• 关键词：紫外吸收剂  河流  污染特征  生态风险

• 基金项目：国家自然科学基金（No.41571445）

• 韩雪
• 华北电力大学环境科学与工程学院, 区域能源环境系统优化教育部重点实验室, 北京 102206

• 李广辉
• 招商局生态环保科技有限公司, 重庆 400067

• 钟伏勇
• 华北电力大学环境科学与工程学院, 区域能源环境系统优化教育部重点实验室, 北京 102206

• 唐阵武
• 1. 华北电力大学环境科学与工程学院, 区域能源环境系统优化教育部重点实验室, 北京 102206;2. 中央民族大学生命与环境科学学院, 北京 100081

• 摘要：为了解合肥市注入巢湖的河流中有机紫外吸收剂污染情况，分析了入湖河流水和沉积物中12种有机紫外吸收剂的污染水平及其生态风险.结果表明，水中有机紫外吸收剂总含量为194~587 ng·L^-1，均值为374 ng·L^-1.二苯甲酮（BP）是最主要的有机紫外吸收剂类污染物，平均占紫外吸收剂总含量的50.7%.沉积物中有机紫外吸收剂总含量为9.39~178 ng·g^-1，均值为50.5 ng·g^-1，奥克立林（OC）、BP和2-（2'-羟基-5'-叔辛基苯基）苯并三唑（UV-329）为主要组成.污染来源分析表明，水和沉积物中有机紫外吸收剂主要来源于化妆品和工业品中使用的紫外线吸收剂的排放.基于评价因子法推导了预测无效应浓度（PNEC）值，利用风险商（RQ）法评价了11种有机紫外吸收剂的生态风险.水样中二苯甲酮-3（BP-3）对藻类存在中等风险，约半数的水样中胡莫柳酯（HMS）和OC对藻类也存在中等风险，50%的水样中4-甲氧基肉桂酸-2-乙基己酯（EHMC）对藻类存在低到中等风险，水样中水杨酸-2-乙基己基酯（EHS）对水生生物存在较低风险，BP对黑头呆鱼也存在较低风险，其它有机紫外吸收剂对水生生物基本不存在风险.沉积物中，BP-3、BP分别对藻类、黑头呆鱼存在较低风险；沉积物中9种logK_ow > 5的有机紫外吸收剂均不存在潜在生态风险.

• Abstract：In order to understand the pollution of organic ultraviolet (UV) filters in rivers flowing into Lake Chaohu, Hefei, the concentrations and risks of 12 organic UV filters in water and sediment were investigated. The results showed that the concentration of total organic UV filters in water ranged from 194 to 587 ng·L^-1, with the mean of 374 ng·L^-1. Benzophenone (BP) was the key pollutant of organic UV filters, representing 50.7% of total UV filters observed in water. The concentration of total organic UV filters in sediment ranged from 9.39 to 178 ng·g^-1, with the mean of 50.5 ng·g^-1. Octocrylene (OC), BP and 2-(2'-hydroxy-5'-octylphenyl)-benzotriazole (UV-329) were found as the dominant compounds detected in the sediments. A source assessment indicated that organic UV filters in water and sediment were mainly derived from the discharges of UV filters used in cosmetics and industrial products. Further, the ecological risks were assessed according to the calculated risk quotient (RQ) based on the predicted no effect concentrations (PNEC). In the water, BP-3 might pose moderate risk to algae, homosalate (HMS) and OC also had moderate risks to algae in more than half of water samples, and 2-ethylhexyl 4-methoxycinnamate (EHMC) might pose low to moderate risks to algae in 50% of water samples, Ethylhexyl salicylate (EHS) had low risk to aquatic species in water samples, and BP also had low risk to pimephales promelas in water samples, while other organic UV filters had no ecological risk to aquatic organisms. In the sediment, BP-3 and BP had low risk to algae and pimephales promelas respectively. To nine chemicals in sediments, with logK_ow > 5, had no potential ecological risks to aquatic species.

• Key words：ultraviolet filters  rivers  pollutions  ecological risks

• 
  摘要点击次数： 1093 全文下载次数： 1924