所属单位：环境与市政工程学院

发表刊物：Journal of Hazardous Materials

关键字：中文关键字：生物毒性；微量污染物；再生水；开放式储存；生态安全，英文关键字：biotoxicity; trace organic chemicals; reclaimed wa

摘要：The storage of water in a landscape lake can act as a buffer zone between reclaimed water production and reuse, but there is still uncertainty about the variation of water quality and toxic effects during the open-storage process. In this study, long-term sample collection, chemical analyses and biotoxicity assessments were conducted on reclaimed water before and after open storage in a landscape lake. The organic contents, in terms of chemical oxygen demand and total organic carbon, were found to be slightly higher in the lake water than that in the reclaimed water, but substantial reduction of the total concentration of 52 trace organic chemicals was obtained and microorganism toxicity, phytotoxicity, aquatic vertebrate toxicity and genotoxicity, were significantly weakened after open storage. Furthermore, the total risk quotient (RQTotal) decreased from 5.12 (potential ecological risk level) in the reclaimed water to 0.18 (negligible ecological risk level) in the lake water. The removal of chlorpyrifos, dichlorphos and tetracycline was identified as the main reason for biotoxicity reduction after open storage. The seminatural environment of the landscape lake would have provided a favorable condition for the decay of toxic trace organic chemicals so that the stored water turned to be safer for further reuse.

备注：马晓姸

合写作者：王东红,HuuHaoNgo,张秋亚,王永坤,戴迪楠

第一作者：王晓昌,马晓妍

论文类型：期刊论文

卷号：卷：318

期号：期：

页面范围：页：663-670

是否译文：否

发表时间：2016-07-01