Seminars

SEE Tech Talk Series on Waste Management and Treatment

Date: 15 December 2018 (Saturday)
Time: 09:30 a.m. – 11:45 a.m.
Venue: Tin Ka Ping Lecture Theatre (LT-1), 4/F, Yeung Kin Man Academic Building (YEUNG), City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Language: English

Brief description

SEE has been undertaking cutting-edge research to address urgent energy- and environment-related issues in three categories: (1) sustainable technologies for energy, environment and health, (2) urban atmospheric and aquatic environment and (3) smart and healthy cities. In this SEE Tech Talk Series, three SEE faculty members will present their ongoing research on Waste Management and Treatment.

Abstracts & Speakers

Topic 1 – Energy-efficient Emerging Membrane Technologies for Wastewater Treatment and Resource Recovery
Dr. Alicia AN, Assistant Professor

Abstract
The unprecedented demand for water, energy, and food, coupled with the impact of climate change, has presented serious global challenges. The inextricable linkage among the water-energy-food nexus makes a vibrant research question for many scientists to explore innovative technologies for achieving global sustainable development. Hong Kong is no exception to this challenge and to strengthen the growing city’s water security, a new desalination plant has been commissioned. At the same time, considering the excessive concentration of nutrients in Hong Kong’s wastewater, many studies now focus on the development of new technologies with the potential to recover resource from wastewater.

To meet this challenge, a paradigm shift has occurred from conventional centralized water treatment systems to the implementation of decentralized systems. At present, the solution has been mainly to implement decentralized systems for desalination or industrial wastewater treatment and reuse, predominantly using reverse osmosis (RO) technology. However, there exist sectors in wastewater treatment where the rigid operational requirements posed by RO can be limiting. For these niches, membrane-based water and wastewater treatment/reuse/desalination technologies are gaining recognition for their practical applicability where RO is found to be inefficient. In this talk, Dr. An will introduce energy-efficient emerging membrane technologies for wastewater treatment and resource recovery.

About the Speaker
Dr. An received her PhD in Civil and Environmental Engineering at the Hong Kong University of Science and Technology (HKUST). Her dissertation on sludge minimization mechanism in Oxic-Settling-Anaerobic process in wastewater treatment system was well received and cited. Since 2009, Dr. An has extended her research and education career with Sustainability concept at the University of Tokyo, Japan.  She has conducted several research projects and field work focused on sustainable water management and urban development.

Topic 2 – Data-driven Decision Making for Waste Management and Resource Efficiency: Path to a Circular Economy
Dr. Shauhrat CHOPRA, Assistant Professor

Abstract
In the 2017 Policy Address, the Hong Kong Government committed to combat climate change by reducing carbon emission up to 70% by 2030. The adoption of a circular economy over a traditional linear economy is one of the key routes to achieve a low carbon future that can mitigate Hong Kong’s waste management crisis as well. Despite the inherent benefits of the circular economy, its adoption is low due to the lack of data and tools for improving resource efficiency and waste management. In this talk, Dr Shauhrat S. Chopra will highlight the utility of tools such as Life Cycle Assessment (LCA). In addition to well-established tools like LCA for data-driven decision making, the talk will also showcase the opportunity for the development of novel Information and Communication Technologies (ICT) tools. In particular, blockchain enabled data-driven tools may have the capability to improve trust and transparency in supply-chain networks, platforms for shared and performance economy, stakeholder participation, and governance and management of organizations. For this reason, Dr Chopra will share the potential opportunities and limitations of the blockchain technology for circular economy applications. Finally, the talk will emphasize the significance of data-driven tools and systems analytics to avoid unintended negative consequences of engineering decisions on the environment.

About the Speaker
Dr. Shauhrat CHOPRA obtained his Integrated Masters of Science in Systems Biology from the University of Hyderabad, India in 2011. He received his PhD in Civil and Environmental Engineering from the Swanson School of Engineering at the University of Pittsburgh, USA, in 2015. His doctoral dissertation was focused on resilience of complex systems including economic systems, industrial symbiosis, and critical infrastructure systems at urban and national levels. Before joining the School of Energy and Environment, Shauhrat worked as a Postdoctoral Researcher at the Institute for Environmental Science and Policy, University of Illinois at Chicago, on the U.S. EPA funded LCnano project focused on sustainable design of future transformative nano-enabled products. His data-driven research is focused on designing indicators for sustainability and resilience of the built environment in support of environmental decision-making.

Topic 3 – Extraction of Molecular Hydrogen from Wastewater
Dr. Yun Hau NG, Associate Professor

Abstract
Molecular hydrogen (H2) is a clean energy carrier with high energy density. It is also a chemical reagent for petroleum refining as well as ammonia production. Currently, major production way is based on fossil fuel transformation, including the steam reformation of methane. Water splitting is another popular potential way in producing H2 with low or zero carbon footprint but water decomposition is a thermodynamically challenging reaction. Wastewater containing organic pollutants such as pharmaceutical wastewater, leachate, and industrial process water, on the other hand, can be potentially used to produce H2 with reduced energy requirement during the oxidative removal of such organic carbon inherently present in the water stream. In this presentation, we examine a few potential methods to simultaneously oxidise the organic component (pollutant) in the water and reduce the proton to liberate molecular H2. In particular, electrocatalysis, photocatalysis and photoelectrocatalysis would be discussed. Challenges encountered in this waste-to-energy conversion process will be shared in the talk.

About the Speaker
Dr. Yun Hau NG received his B. Sc. (Industrial Chemistry) from the Universiti Teknologi Malaysia in 2003 and his Ph.D from Osaka University (under supervision of Prof. Michio Matsumura) in 2009. After a brief research stay at the Radiation Laboratory, the University of Notre Dame (Prof. Prashant Kamat's group), he joined the Australian Research Council (ARC) Centre of Excellence for Functional Nanomaterials at the University of New South Wales (UNSW) with the Australian Postdoctoral Fellowship (APD) in 2011. In 2014, he took up a lecturer position at the School of Chemical Engineering, UNSW and was promoted to a tenured Senior Lecturer in 2016.

Dr. Ng’s research is focused on the development of novel photoactive semiconductors system (particles and thin films) for sunlight energy-to-chemicals conversion and storage. Focusing on these topics, he has secured more than AUD$3 million research funding in the last 7 years from various sources including the Australian Research Council. As of April 2018, he has published more than 100 peer-reviewed journal articles including well-recognised journals such as Chem. Rev., Adv. Mater., Adv. Energy Mater., JACS, Energy Environ. Sci, Nano Energy, Small and Chem. Mater. Dr. Ng is currently serving as Editorial Board Member for Scientific Reports and Frontiers in Energy Research. He has also served as a Guest Editor in special issues for Catal. Today (Elsevier), ChemPlusChem (Wiley), Particle and Particle Systems Characterizations (Wiley), and Energies (MDPI).

Dr. Ng has received The Distinguished Lectureship Award from the Chemical Society of Japan in 2018. He was previously named the Honda-Fujishima Prize winner in 2013 as the first non-Japanese recipient, in recognition of his work in the area of photo-driven water splitting. He is also an Emerging Investigator in Energy Materials selected by RSC J. Mater. Chem. A in 2016.

Rundown

09:15 – 09:30 Registration
09:30 – 09:35 Opening Remark
Dr. Denis YU, Associate Professor
Presentations
09:35 – 10:05 Energy-efficient Emerging Membrane Technologies for Wastewater Treatment and Resource Recovery
Dr. Alicia AN, Assistant Professor
10:05 – 10:35 Data-driven Decision Making for Waste Management and Resource Efficiency: Path to a Circular Economy
Dr. Shauhrat CHOPRA, Assistant Professor
10:35 – 10:45 Tea Break
10:45 – 11:15 Extraction of Molecular Hydrogen from Wastewater
Dr. Yun Hau NG, Associate Professor
10:35 – 10:45 Q&A Session

11:45

End of Event

Note: Attendance certificates will be issued to attendees at the end of the event.

Registration: http://cap.cityu.edu.hk/studentlan/postDetail.aspx?id=Y15w1820r183411C867420

Enquiry: Please contact Miss Vivian KONG via e-mail: kong.vivian@cityu.edu.hk or tel: 3442 4426.

~All are Welcome~

 

Two-Day Intensive Workshop for 'Membrane-based Sustainable Water Treatment'

Date: 20 - 21 December 2018
Venue: LT 4, 4/F, Yeung Kin Man Academic Building (YEUNG), City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong

Please click here for details.

~All are Welcome~

 

Ocean storms and its representation in climate models: the role of energy and the counter-intuitive impacts of energy dissipation

Dr. Julian Mak

Postdoctoral Research Associate, Department of Physics, University of Oxford

Date: 10 December 2018 (Monday)
Time: 10:00 a.m. – 11:00 a.m.
Venue: B5-309, 5/F, Yeung Kin Man Academic Building (YEUNG), City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

Abstract

The representation of ocean mesoscale eddies (analogous to mid-latitude atmospheric storms) presents a formidable theoretical and computational challenge in ocean global circulation models. At present ocean mesoscale eddies are often not explicitly resolved in models (including those involved contributing to the IPCC reports through the CMIP exercises) due to computation cost, at least not over the high latitudes and the Southern Ocean, and eddy effects are often parameterised. Increasingly however the emergent ocean climatology and its sensitivity between eddy resolving and eddy parameterising models have been found to diverge, in turn impacting model properties such as ocean ventilation time scales, heat content, and so forth. A new geometrically informed, energetically constrained parameterisation is presented, which predicts and demonstrates eddy saturation and degrees of eddy compensation, and in turn on ocean heat content. The rather counter-intuitive role of eddy energy dissipation in setting global ocean stratification and ocean heat content is discussed.

About the Speaker

Dr Julian Mak is currently a postdoctoral research associate at the Department of Physics (Atmospheric, Oceanic and Planetary Physics sub-department) at the University of Oxford, under the UK NERC grant GEOMETRIC held by Prof. David Marshall. Previously he was a postdoctoral research associate at the School of Mathematics at the University of Edinburgh in the UK and at the Department of Geosciences at Tel Aviv University in Israel. He completed his PhD in applied mathematics at the University of Leeds and MMath at Durham University. His research, motivated by rotating stratified turbulence and its role in shaping the Earth's climate, revolves around using computational and mathematical techniques to tackle problems in fluid dynamics..

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 7359 (Tel.)

~All are Welcome~

 

Mini Symposium on Aerosols and Mass Spectrometry

Date: 21 November 2018 (Wednesday)
Time: 09:20 am to 11:50 am
Venue: Room 1410, First Floor, Li Dak Sum Yip Yio Chin Academic Building, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
(Location: https://www6.cityu.edu.hk/wayfinder/en/Building/LI/)
Language: English
Registration: Please register HERE
Organizer:

School of Energy and Environment
City University of Hong Kong

Programme Rundown

Time

Details

9:20am to 9:50am

How we can assess the biological and health effects of aged combustion emissions
Prof. Dr. Ralf Zimmermann, Professor, Institute of Chemistry, University of Rostock

9:50am to 10:20am

Indoor photochemistry
Prof. Dr. Sasho Gligorovski, Research Professor, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences

10:20am to 10:40am

SESI-HRMS and its application in breath analysis
Dr. Amy Li, Associate Professor, Institute of Mass Spectrometry and Atmospheric Environment, Jinan University

10:40am to 10:50am

Break

10:50am to 11:10am

Tracking precursor-origins of ambient secondary organic aerosols using molecular markers
Prof. Jianzhen Yu, Professor, Department of Chemistry, Hong Kong University of Science and Technology

11:10am to 11:30am

Real-time measurements of gas-phase organic acids using chemical ionization mass spectrometry
Dr. Theodora Nah, Assistant Professor, School of Energy and Environment, City University of Hong Kong

11:30am to 11:50am

Formation of secondary organic aerosols from cooking emissions
Prof. Chak K. Chan, Dean and Chair Professor of Atmospheric Environment, School of Energy and Environment, City University of Hong Kong

11:50am

End of Event

Enquiry: theodora.nah@cityu.edu.hk (email)

Please note that the registration is on a first-come-first-served basis.

~All are Welcome~

 

Colloquium— Where Do We Go From Here: The Vision Of A Social Entrepreneur On Climate Change

Mr. CHONG Chan-yau

Co-founder and Chairman
CarbonCare Asia Limited

Date: 21 November 2018 (Wednesday)
Time: 6:00 p.m. – 7:00 p.m.
* Light Refreshments will be served starting from 5:30 p.m.
Venue: G4-302, 4/F, Yeung Kin Man Academic Building (YEUNG), City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

Abstract

Mr. Chong Chan-yau, co-founder and Chairman of Carboncare Asia reflects on the global and local effort in response to climate change. He will shared the challenges and successes of running a social enterprise in promoting changes in business practices.  Mr. Chong will also share his vision on the prospects of a sustainable future!

About the Speaker

Mr. Chong Chan-yau is the Co-Founder and Chairman of CarbonCare Asia Ltd, a leading consultant in ESG services.  He also co-founded Climate Change InnoLab, an NGO promoting innovation and social entrepreneurship.  Mr. Chong has led delegations to the World Summit on Sustainable Development in Johannesburg 2002, UN summits on climate change including COP21 in Paris. Mr. Chong is active in disability rights and various social services. For his community service, Mr. Chong has been awarded Ten Outstanding Young Persons’ Award, MBE, and Honorary Fellowship by The University of Hong Kong.

Registration

The Colloquium is open to all. SEE students are required to register via AIMS in just a few steps: Go to AIMS, select “Student Services”, then select “Central Repository on Student Development Activities System” and search the activity name “SEE Colloquium: The Vision Of A Social Entrepreneur On Climate Change” or the activity code “E2-2018-1703”.

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 2414 (Tel.)

~All are Welcome~

 

TINY ORGANISMS, BIG IMPACT: FROM MICROBES TO HOLISTIC TECHNOLOGIES FOR SUSTAINABLE WASTE MANAGEMENT AND UP-CYCLING

Dr. Amy Tan

Research Fellow
Department of Civil and Environmental Engineering
The Hong Kong Polytechnic University

Date: 5 November 2018 (Monday)
Time: 11:00 a.m. – 11:50 a.m.
Venue: B5-307, 5/F, Yeung Kin Man Academic Building (YEUNG), City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

Abstract

Global challenges related to water, energy, resources, and environment pollution have become unrelenting with increasing global population and people moving from simple subsistence living to advanced industrial economies. Biotechnology is one of the key technologies for the management and up-cycling of organic wastes including wastewater and some industrial effluents. When biotechnology is coupled to other forms of technology, the types of treatable waste stream and resources/energy recovered become manifold, presenting holistic solutions to address current environmental issues.

At the core of biotechnology is the tiny microbe, which represents the simplest functional unit of life on Earth. Yet, the underlying microbiome, metabolism, including microbial synergy and competition of many widely-applied biotechnologies, are largely considered a black box. Through unravelling this intricate web of intra- and intercellular mechanisms, we could better exploit microbes' specialized functions for the development of sustainable and green technologies.

This presentation will describe how a multi-pronged and cross-disciplinary approach, comprising of thermodynamics, meta-omics, and engineering design, can be employed to study, prototype and advance waste-to-energy and waste-to-resource technologies. Specifically, new research directions and findings pertaining to anaerobic digestion for energy formation and microbial biopolymer polyhydroxyalkanoate (PHA) production will be presented. The translation of these scientific findings into practical applications and how these biotechnologies can be interfaced with other non-biological technologies to create waste management solutions would also be discussed and demonstrated.

About the Speaker

Amy Tan is a Research Fellow at the Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University (PolyU). She also serves as a guest lecturer for undergraduate and postgraduate modules related to water and wastewater treatment. She received her PhD degree in Civil and Environmental Engineering from Nanyang Technological University (NTU), Singapore.

Her research focuses on waste-to-energy and waste-to-resource (bio)technologies aimed at sustainable organic waste management and waste up-cycling (bio-energy and high-value bio-products). She is particularly interested in the underlying microbiome, metabolic mechanisms, and the exploitation of this knowledge to address existing environmental and industrial problems. She is also experienced in interfacing biotechnologies with non-biological technologies to create holistic waste-to-energy and waste-to-resource solutions. Currently, she is the Project Manager of one such project, spearheading PolyU’s first Wastewater-to-Energy research pilot plant at Stonecutters Island Sewage Treatment Works.

To date, she has published 15 research papers in peer-reviewed journals including Water Research, Critical Reviews in Environmental Science and Waste Management. One of her papers, “Start a research on biopolymer polyhydroxyalkanoate (PHA): a review”, ranks among the top 15 most cited articles in the journal Polymers. For her excellence in research and teaching, she has received The Hong Kong Institution of Engineers Outstanding Paper Award for Young Engineers/Researchers and The Singapore Ministry of Education Youth Science Conference Outstanding Mentor Award.

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 7359 (Tel.)

~All are Welcome~

 

Mutagenesis-based Evolutionary Engineering for Microbial Biobreeding Aiming at Application in Open Systems

Prof. Xin-Hui XING

Professor and Deputy Director
MOE Key Laboratory of Industrial Biocatalysis
Department of Chemical Engineering
Center for Synthetic and Systems Biology
Tsinghua University, Beijing

Date: 7 November 2018 (Wednesday)
Time: 10:00 a.m. – 11:00 a.m.
Venue: Room 2100, 2/F, Li Dak Sum Yip Yio Chin Academic Building, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

Abstract

Development of rapid and powerful mutagenesis and high throughput adaptive evolution tools is of importance for breeding of microbes aiming at application in environmental and industrial biotechnology. ARTP (atmospheric and room temperature plasma) mutagenesis system developed by our group can directly cause complex and diverse genome mutation including chain break and bases mutation via a unique mechanism. ARTP has the strongest DNA damage, and the highest mutation rate among the physical and chemical mutagenesis methods. Mechanistic study and practical application demonstrated that ARTP mutagenesis is a powerful tool for microbial evolution engineering to create diverse phenotypes. For developing an integrated platform capable of combing ARTP mutagenesis and high throughput adaptive evolution, we further developed a microdroplet-based microbial culture (MMC) system which can be operated automatically with high throughput culture on microchips, good repeatability, online detection of growth states, reprogrammable software, automatic addition of gradient chemical factors. The ARTP mutagenesis together with MMC system is an enabling platform for breeding of diverse microbes, especially aiming at application in open systems, such as environmental biotechnology and bioenergy, which require non-GM microorganisms.

About the Speaker

Prof. Xin-Hui XING received his B.S. from South China University of Technology in 1985, and Ph.D. from Tokyo Institute of Technology in 1992. He had been Assistant Professor at Tokyo Institute of Technology from 1992 to 1998, and Associate Professor at Yokohama National University from 1998 to2001. He was selected as a full professor by the 100-Telent Scholar Program of Tsinghua University in 2000 and joined Department of Chemical Engineering since then. He was appointed as the director of Institute of Biochemical Engineering in 2002, and deputy director of MOE Key Laboratory of Industrial Biocatalysis in 2011. He had been the vice department chairman from 2009 to 2018. His research field covers biobreeding technology and instrumentation, high throughput technology, enzyme engineering, environmental biotechnology and bioenergy. He serves as the editor of Journal of Bioscience and Bioengineering, associate editor of Biochemical Engineering Journal, and editorial board of several domestic and international journals.

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 2414 (Tel.)

~All are Welcome~

 

Harnessing direct electricity from wastewater through solar-wastewater fuel cell

Dr. Wey Yang Teoh

Senior Visiting Fellow
School of Chemical Engineering
The University of New South Wales

Date: 13 November 2018 (Tuesday)
Time: 11:00 a.m. – 11:50 a.m.
Venue: B5-210, 5/F, Yeung Kin Man Academic Building (YEUNG), City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

Abstract

The solar-wastewater fuel cell (SWFC) is an emerging technology capable of harnessing direct electricity from the process of wastewater remediation (Fig. 1). The technology has great potential in many different aspects depending on its target applications: From reducing the carbon footprints in urban wastewater treatment plants, capitalizing on the otherwise unusable residual biomass wastestreams, to serving as a low-cost, decentralized electricity generation unit for the most remote locations. One of the early challenges facing SWFC lies in its adaptation to wastewater environments, and in particular, the prediction of performance in an environment comprising of a large cocktail of organic substrates. By carefully examining the physical and electrochemical interactions of different organic substrates with the electrode surface, we found that strong adsorbates and direct hole scavengers (e.g., carboxylic acids), generated higher photocurrents compared to hydroxyl radical scavengers (e.g., alcohols). Simple and short-chained molecules are the most efficient as a result of their fast degradation kinetics. Based on this, we derived for the first time, a theoretical model that accurately predicts the photocurrent generated from any arbitrary mixture and concentrations of organic substrates. Because the open-circuit voltage of the SWFCs is dependent on the Fermi level of the photoanode, this was maximized through the selection of materials used in the construction of photoanodes. Lastly, we show the long-term performance of the SWFCs in the treatment of actual wastewater collected from different sewage treatment plants.

Fig. 1

Fig. 1. Schematic of the solar-wastewater fuel cell, and the corresponding energy diagram, capable of generating solar electricity whilst treating wastewater.
References
1. Hu, C., Kelm, D., Schreiner, M., Wollborn, T., Mädler, L., Teoh, W.Y., ChemSusChem, 2015, 8, 4005
2. Gong, X., Liu, G., Li, Y., Yu, Y.W.D., Teoh, W.Y., Chem. Mater. 2016, 28, 8082
3. Lv, X., Hu, C., Shang, J., Sit, P.H.-L., Teoh, W.Y., Catal. Today 2018, under review

About the Speaker

Wey Yang TEOH is currently Senior Visiting Fellow (since 2018) at the School of Chemical Engineering, UNSW. Prior to this, he was tenured Associate Professor at the School of Energy and Environment, City University of Hong Kong, where he led the Clean Energy and Nanotechnology (CLEAN) Laboratory. His research is dedicated to the fundamentals of heterogeneous thermal- and photocatalysis, and particularly in solving various Energy and Environmentally-related problems. To do so, he and his group establish new strategies for rational catalysts design based on the photocharge transport, surface molecular catalysis, and photochemical conversions. He serves on the Scientific Board of HeiQ AG, a leading Swiss innovator in textiles.

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 7359 (Tel.)

~All are Welcome~

 

Anion-pillared Hybrid Porous Materials for Gas Separation

Prof. Huabin XING

Prof. Huabin XING

Dean and Professor
College of Chemical and Biological Engineering
Zhejiang University, Hangzhou

Date: 14 November 2018 (Wednesday)
Time: 02:00 p.m. – 03:30 p.m.
Venue: Room 2306, 2/F, Li Dak Sum Yip Yio Chin Academic Building, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

Abstract

That society increasingly depends upon gases as commodities and fuels means that the “age of gas” has dawned, creating with it an urgent demand for designing energy-efficient porous materials to address challenges in gas separations, sensing and storage. However, that there is in general a trade-off between uptake capacity and selectivity of porous materials creates a major barrier toward gas separation/purification through physisorption. In this talk, we will introduce our recent work on gas separation with anion-pillared metal-organic frameworks as adsorbents, including hydrocarbon separations, CO2 capture, and SO2 removal. We reveal that pore chemistry and pore size control in anion-pillared hybrid ultramicroporous materials enables the exploitation of supramolecular chemistry of gases to set new benchmarks for selectivity and that these benchmarks are accompanied by high uptake. The interaction mechanism between gas molecules and hybrid porous materials will be discussed in this talk.

About the Speaker

Prof. Huabin XING received a B.S. in Pharmaceutical Engineering (2000) and a M.S. in Chemical Engineering (2003) from Zhejiang University, and a PhD in Chemical Engineering (2007) from Tsinghua University. He joined the Department of Chemical and Biological Engineering, Zhejiang University, since 2007 as a postdoctoral fellow. In 2014, he has been a full professor of Chemical Engineering at Zhejiang University. In 2013.3-2014.3, he worked as a visiting scientist at the Oak Ridge National Laboratory with Sheng Dai. In 2018, he has been Qiushi Distinguished professor and Dean of College of Chemical and Biological Engineering at Zhejiang University. He was selected as Distinguished Young Scholars of NSFC in 2017, Cheung Kong Young Scholar of the Ministry of Education in 2016, and Top-Notch Young Professionals of China in 2014. He has been selected as the ACS Ind. Eng. Chem. Res. Influential Researchers in 2017 and 2018. He received the First Prize of Zhejiang Provincial Science and Technology Award in 2014, the Youth Science and Technology Award of CPCIF in 2015, and the Houde Bang Young Scientist Award of CIESC in 2016.

His current research interest focuses on the development of functional materials including metal-organic frameworks, ionic liquids, and porous polymers for energy, biological, environmental-related applications, especially for gas separations. He has published over 110 peer-review articles and held 24 patents.

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 2414 (Tel.)

~All are Welcome~

 

The Complexity of photochemical smog

Professor Mattias Hallquist

Full professor in Atmospheric Chemistry
Department of Chemistry and Molecular Biology
University of Gothenburg

Date: 19 October 2018 (Friday)
Time: 4:00 p.m. – 4:50 p.m.
Venue: Y5-304, 5/F, Yeung Kin Man Academic Building (YEUNG), City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

About the Speaker

Professor Mattias Hallquist (MH) is a full professor in atmospheric chemistry, who leads the secondary organic aerosol (SOA) and traffic emission group at UGOT. He is currently coordinating a 5-year multi-project framework (with ca. 2.4 million Euro funding) on Photochemical Smog in China (Research-Policy) supported by the Swedish Research Council. MH has profound expertise in aerosol and atmospheric chemistry. He has previously been Director of UGOT's Atmosphere and Environment graduate school, Director of the Gothenburg Atmospheric Science Centre (2008-2015) and President of the Nordic Society for Aerosol Research (2004-2008). MH is a member of UGOT's Faculty of Science Research Committee. A primary objective of his research is to assist the molecular understanding of key atmospheric processes through use of high-resolution mass spectrometry, mainly involving experiments in flow reactors (G-FROST and Go:PAM) at UGOT and/or large-scale facilities such as the smog chambers at the research center Jülich in Germany. MH's group is currently undertaking air quality research in China, India and Kenya. In addition, MH and co-workers are characterising the emission from in-use individual vehicles with specific focus on secondary formation of particles. All these laboratory studies and field observations provide important inputs to chemical modelling and, hence, crucial scientific foundations for formulating robust climate and air pollution abatement policies.

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 7359 (Tel.)

~All are Welcome~

 

Very-High Resolution (20 m) Flow and Dust Dispersion Modeling: Oceano Dunes, Oceano, CA

Dr. Yuhe HE

Postdoctoral Research Fellow
Department of Biological Sciences, University of Alberta, US

Date: 22 October 2018 (Monday)
Time: 10:00 am - 11:00 am
Venue: G4302, 4/F, Yeung Kin Man Academic Building, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

Abstract

High volume horizontal Hydraulic fracturing (HF) has emerged as a revolutionary method to stimulate the tight shale well, and dramatically increased the unconventional oil and gas production. Once the fracturing pressure released, the stimulated well starts to produce a complex saline mixture, referred as hydraulic fracturing flowback and produced water (HF-FPW). Increasing concerns have been raised regarding the environmental impact of releases of this wastewater to aquatic ecosystems. The toxicity of HF-FPW has not been previously reported, and is complicated by the combined complexity of organic and inorganic constituents in HF fluids and deep formation water. My research focuses on characterizing the chemical and toxicological profiles, and exploring the mechanisms of toxicity of HF-FPW. Targeted and untargeted organic analyses have revealed the HF-FPW contains numerous organics including natural hydrocarbons, additive organics, and potential secondary by-products. Acute and sub-chronic toxicity of HF-FPW was assessed on aquatic invertebrate and fish models. The adverse effects and toxic mechanism of HF-FPW on biotransformation, oxidative stress, endocrine disruption, and embryo development were also evaluated in fish models by using a variety of enzymatic, biochemical, and molecular tools. Overall, this work is the first study to demonstrate the chemical and toxicological complexity of real HF-FPW samples, and has improved our understanding on mechanisms of toxicity of this complex petroleum-associated wastewater and its potential impacts on aquatic ecosystem.

About the Speaker

Dr. Yuhe (Henry) He obtained his B.Sc. and M.Phil. from City University of Hong Kong, and Ph.D. in Toxicology from University of Saskatchewan. He is currently a postdoc fellow at University of Alberta. He is interested in how aquatic organisms respond when exposed to environmental contaminants and stressors. In particular, his research focuses on understanding the mechanism that lead to toxicity in aquatic organisms exposed to various natural and anthropogenic chemical stressors at the molecular and biochemical level. Currently, he is studying the emerging petroleum-associated wastewater issue in North America – the toxicity of hydraulic fracturing flowback and produced water using a variety of molecular and biochemical biomarkers on invertebrate and fish models. His other research interests include environmental toxicity and impact assessment on advance oxidation treatment, nanomaterial, nanopesticide, brominated flame retardants, and other emerging contaminants.

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 4022 (Tel.)

~All are Welcome~

 

Silicone Nanofilaments and the DAGS Approach: Turning Natural Products into High-Performance Materials

Prof. Dr. Stefan Seeger

Prof. Dr. Stefan Seeger

University of Zurich, Department of Chemistry

Date: 25 October 2018 (Thursday)
Time: 2:00 p.m. - 3:30 p.m.
Venue: LI-1100, 1/F, Li Dak Sum Yip Yio Chin Academic Building, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

Abstract

Novel nanostructures synthesized by polycondensation reactions of various silane precursors are presented. Our group was the first synthesizing silicone nanofilaments which are very useful for a simple conversion of surfaces, e.g. from hydrophilic into superhydrophobic surfaces. Subsequent reaction schemes lead to all kind of wetting and antiwetting properties including superoleophobic surfaces. Various application fields will be addressed. Due to appropriate adjustment of the reaction conditions it is shown that many other nanostructures can be synthesized, e.g. nano-vessels, discs, nanotubes etc.

Applications, in particular the upgrading of basic natural products into high performance products for construction materials, fabric finishing, and products for pollution removal and degradation are presented.

About the Speaker

Stefan Seeger studied chemistry at University of Heidelberg under Technical University Berlin. In 1992, he earned his PhD degree. He later studied Business administration at FernUniversität Hagen. In 1992 he established a research group for biophysical chemistry at the University of Heidelberg. After working as a postdoctoral student at the University of Lund in Sweden, he returned in 1994 to University of Heidelberg to finish his habilitation in 1997. Later that year, he was appointed as a professor for Biosensors at the University of Regensburg/Germany. In 1999, he was appointed at University of Zurich/Switzerland to a chair for physical chemistry. In 2001, he was appointed as the director of the Institute for Physical Chemistry. Currently he is a member of the board of the new Chemistry Institute at this University. Seeger invented for example the surface sensitive analysis Supercritical Angle Spectroscopy techniques, Silicone Nanofilaments, and the DAGS chemical synthesis approach. He is the founder of technology companies, e.g. Molecular Machines & Industries, the leading provider of single cell isolation technologies.

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 2412 (Tel.)

~All are Welcome~

 

A Quest for Sustainability

Dr. Jeanne NG

Dr. Jeanne NG

Director of CLP Research Institute
Chair of Hong Kong Institute of Qualified Environmental Professionals Limited (HKIQEP)

Date: 31 October 2018 (Wednesday)
Time: 6:00 p.m. – 7:00 p.m.
* Light Refreshments will be served starting from 5:30 p.m.
Venue: P4703, 4/F, Yeung Kin Man Academic Building, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

Abstract

The concept of 'sustainable development' was the foundation of the United Nations Conference on Environment and Development held in Rio de Janeiro in 1992. This event was the beginning of an international movement for Governments around the world to commence devising and implementing action plans and strategies for moving towards a more sustainable pattern of development. Since then, the business sector has slowly been drawn into the world of sustainable development, as have the communities surrounding them. Dr Ng will share her perspectives on how and why the pace of sustainability in Hong Kong has changed drawing from her experience in the environmental and sustainability fields over the past 25 years.

About the Speaker

Dr. Jeanne NG is currently the Director of the CLP Research Institute and Chair of the Hong Kong Institute of Qualified Environmental Professionals Limited (HKIQEP). Dr. Ng holds a BSc in Toxicology from the University of Toronto and a PhD in Environmental Management from the University of Hong Kong. She has extensive experience in the environmental industry and has held senior roles in international environmental / engineering consulting companies prior to joining CLP. She was involved in most of the early Hong Kong governmental air pollution and climate strategy and policy studies and is regarded as one of Hong Kong’s experts in air and greenhouse gas emissions inventories. Dr. Ng is also a frequent guest lecturer on environmental and sustainable development issues at various Hong Kong universities.

Dr. Ng is currently a Board member of a number of organisations including the Julie Ann Wrigley Global Institute of Sustainability at Arizona State University, the International Emissions Trading Association (IETA) and the International Integrated Reporting Council (IIRC). She is also a Stakeholder Council Member of the Global Reporting Initiative (GRI) and is a member of the Prince’s Accounting for Sustainability Project (A4S) Expert Panel. She is also a member of the Project Advisory Panel for Emerging Forms of External Reporting under the International Auditing & Assurance Standards Board (IAASB).

Registration

The Colloquium is open to all. SEE students are required to register via AIMS in just a few steps: Go to AIMS, select “Student Services”, then select “Central Repository on Student Development Activities System” and search the activity name “SEE Colloquium: Environmental Challenges and Opportunities in HK” or the activity code “E2-2018-1662”.

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 2414 (Tel.)

~All are Welcome~

 

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