PCDDs/PCDFs and PCBs in water samples from the Three Gorge Reservoir |
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Authors: | Chen Ji-an Luo Jiaohua Qiu Zhiqun Xu Chuan Huang Yujing Jin Yi-he Saito Normitsu Yoshida Toshihiro Ozawa Keiichi Cao Jia Shu Weiqun |
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Institution: | School of Military Preventive Medicine, Third Military Medical University, Chongqing 400038, China. |
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Abstract: | The Three Gorge Reservoir (TGR) is the largest reservoir in China and its water quality is an important health concern, we have determined the concentrations of PCDDs/PCDFs and PCBs in the water samples collected at three seasons: August 2004, January 2005 and August 2005. The results showed that the average WHO-TEQ of total dioxins-like compounds (PCDDs/PCDFs+PCBs) was 0.06558 pg l(-1), ranged from 0.0008 to 0.32439 pg l(-1), which are much lower than other reported water sources. The main dioxins (PCDDs/PCDFs) are hepta- and octa-chlorinated dibenzo-p-dioxins (CDDs) and chlorinated dibenzofurans (CDFs). Since the levels of dioxins may change after the last water-store stage, the present study provides important data to compare the water quality in the TGR in the future. |
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