生态环境学报2017，Vol.26Issue(7)：1210-1215,6.DOI:10.16258/j.cnki.1674-5906.2017.07.017
广东省典型城市污泥中三氯生及其转化产物的分布特征
Distribution Characteristics on Triclosan and its Transformation Products in Typical Municipal Sludge of Guangdong Province
摘要
Abstract
Triclosan (TCS) is widely used in personal care products due to its powerful bactericidal and antibacterial properties, and it has become a global emerging contaminant. In this study, we developed the method for determination of bound residues of TCS, and improved the integrated analysis on environmental occurrence of TCS. Based on the developed method, TCS and methyl triclosan (MTCS) in sludge samples from seven wastewater treatment plants in Guangdong Province were determined by liquid chromatography-tandem mass spectrometry and gas chromatography-tandem mass spectrometry, respectively. Concentration levels of TCS and MTCS, the characteristics of bond residues of TCS in sludge were then discussed. The results indicated that TCS, MTCS and bound-TCS could detected in sludge, and the concentrations ranged from 374.4 to 27978.1 ng?g-1, from 26.2 to 150.3 ng?g-1, and from not detected to 129.1 ng?g-1 on dry weight, respectively. There were significant differences in the levels of TCS and MTCS in different sludge samples, which may be subject to wastewater sources, daily capacity and treatment technology etc. Simultaneously, organic matter could affected the forms of TCS in sludge. The results of MTCS/TCS (0.3%~27.6%) and bound-TCS/free-TCS (0.0%~8.6%) in sludge samples indicated that concentrations of MTCS were higher than that of bound-TCS in the sludge of domestic sewage source, whereas the reversed results were found in the sludge of mixed sewage source. It implied that a competitive mechanism was occurred between methylation and formation of bound residues of TCS. The results of this study can provide support for the understanding of environmental transformation, fate and ecological risk assessment of TCS.关键词
城市污泥/三氯生/甲氧基三氯生/结合态/分布特征Key words
municipal sludge/triclosan (TCS)/methyl triclosan (MTCS)/bound residues/distribution characteristics分类
资源环境引用本文复制引用
朱丽可,程根,宋寒,曾祥英,高淑涛,于志强..广东省典型城市污泥中三氯生及其转化产物的分布特征[J].生态环境学报,2017,26(7):1210-1215,6.基金项目
国家自然科学杰出青年基金项目(41225013) （41225013）
国家自然科学基金项目(41273121) （41273121）
