Spatial and temporal evaluations of estrogenic activity in tap water served by a water plant in Wuhan, China

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• 作者：Qiang Zeng^a ; ^b ; Wen-Cheng Cao^a ; ^b ; Liang Xu^a ; ^b ; Yong-Zhe Chen^a ; ^b ; Luo-Jia Yun^b ; ^c ; Ai-Lin Liu^a ; ^b ; Jing Zhang^d ; ^{fyebzj@163.com} ; Wen-Qing Lu^a ; ^b ; ^{luwq@mails.tjmu.edu.cn} ; ^{liual2003@yahoo.com.cn}
• 关键词：Estrogenic activities ; Recombinant yeast assay ; Tap water ; Exogenous metabolic activation system
• 刊名：Ecotoxicology and Environmental Safety
• 出版年：2013
• 出版时间：1 May, 2013
• 年：2013
• 卷：91
• 期：Complete
• 页码：198-203
• 全文大小：467 K

文摘

This study aimed to evaluate the spatial and temporal characteristics of estrogenic activities in tap water served by a water plant in Wuhan, China. Tap water samples were monthly collected from the three sampling sites with different distances of distribution network from the plant during April 2010-March 2011: Min (less than 0.1 km), Mid (approximately 4 km) and Max (approximately 8 km). Estrogenic activities of solid phase-extracted tap waters were measured by using recombinant yeast assay incorporated with and without exogenous metabolic activation system (rat liver S9 fractions) and expressed as 17¦Â-estradiol equivalents (EEQ). Pro-estrogenic and estrogenic activity in tap water ranged from 151.4 to 1395.6 pg EEQ/L and 35.2 to 1511 pg EEQ/L, respectively. Average pro-estrogenic activity (680.3 pg EEQ/L) was significantly higher than estrogenic activity (412.8 pg EEQ/L) throughout the whole year. The pro-estrogenic activity significantly increased with the extending of distribution network, and was also statistically correlated with water temperature and pH. However, pro-estrogenic and estrogenic activity was not altered across four seasons. Our results suggest that the pro-estrogenic and estrogenic chemicals are present in tap water served by the water plant.