\r牛志广¹，张玉彬¹，吕志伟¹，张 颖²

AuthorsHTML:\r牛志广¹，张玉彬¹，吕志伟¹，张 颖²

AuthorsListE:\rNiu Zhiguang ¹，Zhang Yubin ¹，Lü Zhiwei¹，Zhang Ying ²

AuthorsHTMLE:\rNiu Zhiguang ¹，Zhang Yubin ¹，Lü Zhiwei¹，Zhang Ying ²

Unit:\r1. 天津大学海洋科学与技术学院，天津 300072；
2. 南开大学环境科学与工程学院，天津 300071


Unit_EngLish:\r1. School of Marine Science and Technology，Tianjin University，Tianjin 300072，China；
2. College of Environmental Science and Engineering，Nankai University，Tianjin 300071，China

Abstract_Chinese:\r三氯生(triclosan，TCS)是一种典型的药品与个人护理品(pharmaceuticals and personal care products，PPCPs)类物质，因其高效广谱性，常作为多种杀菌消毒剂的主要成分．TCS 对于人体及部分水生生物在不同层次上的毒性已经得到证实，且由于其具有较强的亲脂性，很容易在生物体中蓄积，而通过食物链的富集放大作用，在食物链较高等级的生物体内有可能达到相当的浓度．目前还没有国家对水体中的TCS 设置浓度阈值，近年来，我国TCS 的使用量巨大，且有逐年上升的趋势，并且由于处理不彻底，最终有相当浓度的TCS 进入水体环境之中，具有潜在的生态风险．因此，为了解TCS 对水环境的生态学影响，本研究对渤海湾近岸海域17 个典型位点的污染状况进行了监测，构建了TCS在不同水环境中的物种敏感性分布(species sensitivity distribution，SSD)模型，以此为基础推导了TCS的水质基准(water quality criteria，WQC)，并用商值法评价了不同水质基准条件下，TCS对渤海湾近岸海域的生态风险．通过推导得到TCS 的淡水急性、淡水慢性和海水慢性水质基准分别为216 ng/L、50 ng/L 和384 ng/L；17 个典型位点的TCS 浓度范围为ND～81.2 ng/L，检出率超过80%；生态风险评价结果显示，风险商(risk quotient，RQ)的变化范围为0～1.62．以淡水急性、淡水慢性、海水慢性水质基准为基础进行计算，17 处采样点中处于中高风险的比例分别为47.06%、82.35%、11.76%．

Abstract_English:\rTriclosan (TCS)，commonly found in pharmaceuticals and personal care products (PPCPs)，is often the main component of several disinfectants owing to its broad spectrum. The toxicity of TCS to the human body and certain aquatic organisms at different levels has been confirmed. Given its strong lipophilicity，TCS easily accumulates in organisms，and through the enrichment and amplification of the food chain，a considerable concentration of TCS can be introduced into higher-level organisms. Currently，no national threshold is available for TCS concentration in water. Owing to the substantial usage of TCS and its incomplete treatment in China，a considerable concentration of TCS eventually enters the aquatic environment，resulting in potential ecological risks. To understand the ecological impacts of TCS on the aquatic environment，the pollution at 17 typical sites in the coastal waters of Bohai Bay was monitored in this study. A species sensitivity distribution (SSD)model of TCS in different aquatic environments was constructed，and water quality criteria(WQC) were deduced. The ecological risk of TCS to the coastal waters of Bohai Bay was evaluated via the quotient value method under different water quality conditions. The water quality criteria for acute freshwater，chronic freshwater，and chronic seawater of TCS concentration were 216 ng/L，50 ng/L，and 384 ng/L，respectively. The concentration at the 17 typical sites was ND—81.2 ng/L，and the detection rate was over 80%. The results also showed that the risk quotient (RQ)ranged from 0 to 1.62. Based on the water quality criteria of acute freshwater，chronic freshwater，and chronic seawater，the proportions of the 17 sampling sites in the medium-to-high risk were 47.06%，82.35%，and 11.76%，respectively.

Keyword_Chinese:三氯生；物种敏感性分布；水质基准；生态风险

Keywords_English:triclosan；species sensitivity distribution；water quality criteria；ecological risk


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