CCEA 2019
Keynote Speakers


Keynote Speaker I

Prof. Yuegang Zuo


Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, USA


Yuegang Zuo is currently a Full Professor in analytical and environmental chemistry and Director of Graduate Programs at Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth. He is also a Full Professor in marine chemistry at the School of Marine Science and Technology, University of Massachusetts. He received his B.S. degree in chemistry from Wuhan University in 1982, his M.S. degree in environmental chemistry from the Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, in 1984, and his Ph.D. in environmental science from Swiss Federal Institute of Technology Zurich in 1992. Most of his recent research has focused on separation, identification and quantification of endocrine disrupting pollutants and phenolic antioxidants in plants and seafood as well as in the related environments and examine their occurrence, sources, distribution, transportation and fate in the biochemsphere.  He has published over 70 scientific papers in prestige journals such as Science, and Environmental Science and Technology.

Speech Title: Absorption of Estrogenic Pollutants onto Microfiltration Membranes

Abstract: Estrogenic pollutants, like 17α-Ethinylestradiol (EE2), a compound with high endocrine-disrupting potency and high resistance to biodegradation in the aqueous environment, attracts increasing concern in the past decade. As a consequence, the elimination of EE2 is becoming a hot topic in recent researches (Zuo, Zhang & Deng, Chemosphere, 2006, 63, 1583-1590; Yong et al., Sci. Total Environ. 2013, 463-464, 802-809; Zuo, Zhang & Zhou, Environ. Sci.: Processes & Impacts 2013, 15, 1529-1535; Albalawi & Zuo, International J. Chem. Engineering & Applications, 2018, 9, 71-75). In this work, adsorption of EE2 was comparatively assessed on four types of microfiltration membranes at different pH, salinity, methanol content and concentrations of EE2 in feed solutions. Adsorption experiments performed in aqueous solution at different pH values showed that adsorption of EE2 by nylon membrane drops drastically along with the dissociation of EE2 with pH increasing from 9 to 11. Series of experiments on salinity (1.75-35g/L NaCl) effect were also performed at constant pH value, and the results indicated that adsorption of EE2 on nylon membrane increased with increasing salinity. Then, simulated brackish water prepared from a sequence of diluted seawater was employed to study the adsorption of EE2 in brackish water. The consequence matched with that of previous salinity effect study. Presence of methanol in feed solution significantly reduced nylon membrane adsorption of EE2.


Keynote Speaker II

Assoc. Prof. Chi-wai KAN


Institute of Textiles and Clothing, The Hong Kong Polytechnic University, 
Hung Hom, Kowloon, Hong Kong


Dr. Kan graduated from Hong Kong Polytechnic with a BSc in Textile Chemistry. He gained his PhD degree from the Hong Kong Polytechnic University. He had worked in private and public sectors in the area of textile evaluation and safety and health management for more than five years before joining the Institute. His main duties in the Institute are in the area of teaching colouration and finishing. Dr. Kan's research interests are also in the area of colouration and finishing.
Dr. Kan holds the professional qualification of Chartered Colourist, Chartered Textile Technologist and Chartered Safety and Health Practitioner; also Fellowship of the Society of Dyers and Colourists and Textile Institute, U.K. In addition, Dr. Kan is a member of Royal Society of Chemistry, Institution of Occupational Safety and Health and Hong Kong Institution of Textile and Apparel.
BSc (Hons) in Textile Chemistry, The Hong Kong Polytechnic University, 1994
PhD in Textile Chemistry, The Hong Kong Polytechnic University, 1998
MSc in Total Quality Management and Business Excellence, Sheffield Hallam University, 2002

Speech Title: Non-aqueous Dyeing of Cotton with Reactive Dyes

Abstract: Dyeing with reactive dyes is generally performed in water-based dye bath. Waste aqueous effluent containing dye residues and concentrated electrolytes causes serious environmental problems. Sustainable water-free process for cotton dyeing using anionic surfactant as building as dye carrier. In recent years, new concepts in the dyeing technology that avoid using water and salt-free process, namely non-aqueous dyeing technology, are being investigated and evaluated.
The dyeability of cotton fabrics with reactive dye, in less water and salt free condition was investigated using reverse-micellar approach comprising of nonionic surfactant. The reactive dye was satisfactorily encapsulated in the reverse micelle under the optimised process parameters as measured by the colour yield. Dyeability of cotton fibre with reactive dye from the reverse micellar solution was improved even in a salt free condition. Experimental results revealed that dyeability in the proposed less water and salt free dyeing process is better than that in conventional water-based dyeing process.


Plenary Speaker I

Assoc. Prof. Yiwei Deng


Department of Natural Sciences, University of Michigan – Dearborn, USA


Dr. Yiwei Deng is an associate professor in the Department of Natural Sciences at the University of Michigan-Dearborn. She received her B.S. degree in chemistry from Wuhan University in 1982, her M.S. degree in environmental chemistry from the Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, in 1985, and her Ph.D. in environmental science from Swiss Federal Institute of Technology Zurich in 1992. Her research interests are in the areas of analytical chemistry and environmental chemistry. Her research work focus on development of analytical methods for environmental applications, and study sources, transformation and fate of pollutants (i.e., heavy metals, parabens, polycyclic aromatic hydrocarbons, petroleum hydrocarbons, etc.) in aquatic and atmospheric environments.


Plenary Speaker II

Associate Prof. Takaaki Wajima


Chiba University, Japan


Assoc. Prof. Wajima was born in February 1976 in Saga Prefecture, Japan. He has been an Associate Professor in the Department of Urban Environment Systems, Graduate School of Engineering, Chiba University, Japan, since 2013. He received his bachelor’s degree and master’s degree in resource engineering from Kyoto University, Japan, in 1998 and 2000, respectively, and his PhD in environmental mineralogy and technology from Kyoto University, Japan, in 2004. His main PhD research theme was “microporous materials synthesized from paper sludge ash at low temperature, and their chemical mineralogy.” In 2004, he moved to the Institute of Ocean Energy at Saga University to work as a postdoctoral researcher, and from 2007 to 2013 he was an Assistant Professor at Akita University, Japan. His main research interests are waste recycling, resource recovery, and environmental purification.




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