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Paul Chen
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National University of Singapore, Singapore |
Title :
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Design and testing of nano-particle embedded affinity membranes for chemical and environmental applications
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Abstract : |
Due to industrialization, both surface and ground-water has been heavily contaminated. Nano particles have their unique physical and chemical properties and are found to be powerful in water treatment. In this talk, the approaches for fabrication of nano particles will be first presented. Several materials such as adsorbents and membranes can be further used in association of the nano particles in order that the separation of nano particles after use can become easier. A series of research works will be presented to illustrate the application of the technology in water treatment. In particular, the treatment of toxic substances such as arsenic and fluoride will be discussed in details. It has been demonstrated that the materials outperform the commercially available adsorbents, ion exchange resin and membranes. pH plays an important role in the treatment. The presence of competing substances such as heavy metal, anions and organic matters seems to have less effect on the treatment. Several mathematical models have been developed to illustrate the removal mechanisms.Such important issues as toxicity study of nano particles and industrial-scale application of the technology will be presented. Finally, it is demonstrated that the said materials can be recycled and reused through low-cost engineering measures, by which makes the technology more sustainable for water treatment. |
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Biography : |
Dr J. Paul Chen has been with the environmental engineering program in the National University of Singapore since 1998. His research interests are physicochemical treatment of water and wastewater and modeling. He has published three books, more than 100 journal papers and book chapters with citation of nearly 3000 and H-index of 30 (ISI). He holds seven patents in the areas of adsorption technologies and ballast water management systems. He has received various honors and awards, including Guest Professor of the Hua Zhong University of Science and Technology, and Shandong University of China, and Distinguished Overseas Chinese Young Scholar of National Natural Science Foundation of China. He has been recognized as an author of highly cited papers (Chemistry and Engineering) of ISI Web of Knowledge. Professor Chen received his MEng degree from the Tsinghua University of Beijing and his PhD degree from the Georgia Institute of Technology of Atlanta, Georgia. |
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