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講者：林郁真教授
演講題目：The Occurrence and Phototransformation of Pharmaceuticals in Aqueous Environments in Taiwan
演講時間：3/14（五）15:30~17:20
演講地點：普通館 101
主持人：吳嘉文教授
Dr. Angela Yu-Chen Lin
Email: yuchenlin@ntu.edu.tw
Website: http://homepage.ntu.edu.tw/~yuchenlin/
Dr. Angela Yu-Chen Lin is an Associate Professor in the Graduate Institute of Environmental Engineering at National Taiwan University. She received her B.S. degree from Caltech in 1999, and M.S. and Ph.D. degrees in Environmental Engineering from Stanford University in 2005. She worked at Kennedy/Jenks Consultants for a year before joining National Taiwan University faculty in 2006. Dr. Lin’s research and teaching interests are in the area of environmental photochemistry, analytical chemistry, fate (natural attenuation) and transport of contaminants in aqueous environments, water recycling and water/wastewater treatment technology. Dr. Lin has more than thirteen years of research experience on the occurrence and fate of emerging contaminants such as pharmaceuticals and personal care products, endocrine disruptors and perfluorinated chemicals. She has published more than sixty highly cited peer-reviewed professional papers on the above topics. She was awarded the Young Scholar Academic Research Award in 2013 (Dr. Ta-You Wu Memorial Award), the most prestigious research award from National Science Council in Taiwan.
藥物於台灣環境水體之流佈與自然光降解宿命
The Occurrence and Phototransformation of Pharmaceuticals in
Aqueous Environments in Taiwan
林郁真(Angela Yu-Chen Lin)
台灣大學環境工程學研究所(yuchenlin@ntu.edu.tw)
Abstract
Water scarcity has long been an issue, forcing us to rely increasingly on degraded water sources such as recycled wastewaters for drinking water. Water resources are prone to pollution through natural and anthropogenic contaminations, resulting in death and disease worldwide. A major source of water pollution is the treated, undertreated and untreated wastewaters released from wastewater treatment plants (WWTPs). In Taiwan, hospitals and sewage treatment plants also release their effluents into neighboring waterways. Therefore, all pollutants not completely removed during the treatment process are released and enter the receiving water bodies. Among these are pharmaceuticals that have raised significant concerns in the twenty-first century.
Pharmaceuticals undergo various natural attenuation process in environmental waters, including biotic (biodegradation, bioaccumulation) and abiotic (hydrolysis, photolysis, sorption, oxidation) degradation. Among these elimination processes, sunlight-mediated photodegradation may occur via direct and indirect pathways and have reported to significantly reduce the predicted environmental concentrations of various pharmaceuticals. Direct photolysis occurs through light absorption by the chemical itself and leads to chemical bond cleavage. Indirect photolysis involves light absorption by dissolved organic matter (DOM), nitrates, nitrites and bicarbonate in the aqueous environments, producing reactive species that react with target pharmaceuticals.
Over hundreds of commonly used pharmaceuticals (antibiotics, estrogens, NSAIDs, lipid-regulators, controlled substances, etc) were investigated and many were identified in the effluents of hospitals/WWTPs/drug production facilities/animal husbandries, rivers, reservoirs and even groundwater systems in Taiwan. Once pharmaceuticals are released into waterways, it is important to fully understand their phototransformation potential, their fate, in the natural water bodies to predict the overall risk for exposure to these compounds.
Keywords: Pharmaceuticals, Photodegradation, Natural Attenuation, Occurrence
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