中国不同pH值条件下锌对本地淡水生物的急性毒性及有害浓度
Acute Toxicity and Hazardous Concentrations of Zinc to Native Freshwater Organisms Under Different pH Values in China.
作者信息
Li X F, Wang P F, Feng C L, Liu D Q, Chen J K, Wu F C
机构信息
College of Environment, Hohai University, Nanjing, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China.
出版信息
Bull Environ Contam Toxicol. 2019 Jul;103(1):120-126. doi: 10.1007/s00128-018-2441-2. Epub 2018 Sep 24.
Zinc bioavailability to aquatic organisms varies greatly under different pH values. In the present study, five native species in China and four common international test species were selected to investigate the influence of changing pH on acute zinc toxicity. The results showed that the higher trophic levels exhibited increasing sensitivity to zinc as pH decreased. However, when the pH value was between 8 and 11, the acute toxicity of zinc was relatively constant. In addition, by using a species-sensitivity distribution (SSD) method, the short-term hazardous concentrations of zinc at different pH values (based on the 5th percentiles of the pH-specific SSDs) were determined to be 17.26 µg/L (pH 4), 48.31 µg/L (pH 5), 80.34 µg/L (pH 6) and 230.6 µg/L (pH 7), respectively. The present study provides useful information for deriving water quality criteria and assessing the risks of metals in the near future.
锌对水生生物的生物有效性在不同pH值下差异很大。在本研究中，选择了中国的五种本土物种和四种常见的国际测试物种，以研究pH值变化对锌急性毒性的影响。结果表明，随着pH值降低，营养级越高对锌的敏感性越高。然而，当pH值在8至11之间时，锌的急性毒性相对稳定。此外，通过使用物种敏感度分布（SSD）方法，确定了不同pH值下锌的短期有害浓度（基于特定pH值的SSD的第5百分位数）分别为17.26μg/L（pH 4）、48.31μg/L（pH 5）、80.34μg/L（pH 6）和230.6μg/L（pH 7）。本研究为推导水质标准和评估近期金属风险提供了有用信息。
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