丁婷婷;杜士林;王宏亮;张亚辉;王一喆;何连生;

• 1:中国环境科学研究院环境分析测试技术中心
• 2:桂林理工大学环境科学与工程学院

摘要(Abstract)：

沙颍河流域是淮河流域上游污染问题突出、污染贡献大的流域之一。针对沙颍河流域缺乏对硝基苯水生生物水质基准深入研究的问题,选择了硝基苯开展沙颍流域本土生物毒性试验,推导了沙颍河流域硝基苯的水质基准,并对沙颍河流域硝基苯实际暴露浓度进行了生态风险评估。结果表明,硝基苯对秀丽白虾、霍甫水丝蚓、黄颡鱼和河蚬96 h半数致死浓度(96h-LC50)分别为45.436、178.299、17.397和119.069 mg·L~(-1);秀丽白虾和黄颡鱼28 d无可观测效应浓度(NOEC)分别为2.858mg·L~(-1)和3.429 mg·L~(-1); 28 d最低可见效应浓度(LOEC)分别为5.144 mg·L~(-1)和6.173 mg·L~(-1);黄颡鱼28 d的20%效应浓度(EC20)为4.538 mg·L~(-1)。采用物种敏感度排序法(SSR)获得沙颍河流域硝基苯急性基准值(CMC)和慢性基准值(CCC)分别为0.007 mg·L~(-1)和0.002 mg·L~(-1)。使用层级风险评估方法(商值法、安全阈值法和联合概率曲线法)对沙颍河流域地表水的硝基苯进行了风险评估,3种方法风险评估结果一致,沙颍河水体中硝基苯对沙颍河水生生物基本没有风险。研究结果为构建沙颍河硝基苯的水质基准以及管理提供参考。

关键词(KeyWords)： 硝基苯;沙颍河流域;水质基准;生态风险评估

Abstract:

Keywords:

基金项目(Foundation): 国家水体污染控制与治理科技重大专项(2017ZX07602-003)

作者(Author): 丁婷婷;杜士林;王宏亮;张亚辉;王一喆;何连生;

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DOI:

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