中国主要水体DDT生态风险的初步评价
Preliminary ecological risk assessment of DDT in surface waters of China
查看参考文献57篇
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文摘
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基于中国主要淡水水体DDT的浓度数据及其对水生生物的效应浓度数据的概率分布曲线，采用联合概率法和商值概率分布法对中国主 要淡水水体DDT的生态风险进行初步评价，同时根据SSD曲线计算各类水生生物的HC_5 (Hazardous Concentrations for 5% the species),对各类 水生生物的敏感性进行讨论.结果表明，DDT对无脊椎动物和脊椎动物的HC_5分别为1.90和3.09 μg.L~(-1),无脊椎动物对DDT较为敏感；对鱼 类、昆虫类和甲壳类的HC_5分别为3.24、1.59和2.01 μg.L~(-1),昆虫类对DDT最敏感，鱼类最不敏感.两种概率风险评价结果一致，中国水体 DDT对水生生物的风险较小；不同类别生物的生态风险评价表明，DDT对脊椎动物的风险大于无脊椎动物；DDT对无脊椎动物的风险最大，其 次是甲壳类，对鱼类的风险最小。 |
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其他语种文摘
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Based on the concentrations of DDT in surface waters and the available toxicity data obtained from laboratory studies, the ecological risk of DDT in surface waters of China was assessed using joint probability curves and quotient probability distribution. In addition, the Hazardous Concentrations for 5% of the species (HC_5) were calculated from species sensitivity distribution, and then the sensitivities of different taxonomic groups were discussed. The results indicated that HC_5 were 1.90 and 3.09 μg·L~(-1) for invertebrates and vertebrates, respectively, suggesting higher sensitivity of invertebrates. Additionally, HC_5 were 3.24 μg.L~(-1), 1.59 μg·L~(-1), and 2.01 μg.L~(-1) for fishes, insects and crustaceans, indicating the highest sensitivity of insects and the lowest sensitivity of fishes. The results of probabilistic risk assessments indicated that the ecological risk of DDT to aquatic organisms were low. The ecological risk of DDT to invertebrates was higher than that to vertebrates. The ecological risk of DDT to different taxonomic groups was in the descending order of insects, crustaceans, and fishes. |
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来源
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环境科学学报
,2011,31(11):2545-2555 【核心库】
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关键词
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DDT
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生态风险评价
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概率风险评价
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地址
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1.
中国科学院广州地球化学研究所, 国家环境基准与风险评估国家重点实验室, 广州, 510640
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中国环境科学研究院, 国家环境基准与风险评估国家重点实验室, 北京, 100012
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中国科学院广州地球化学研究所, 广州, 510640
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-2468 |
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学科
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环境质量评价与环境监测 |
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基金
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国家973计划
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国家自然科学基金项目
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文献收藏号
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CSCD:4345652
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