论文部分内容阅读
在海洋环境风险评价及环境标准与基准的制定中,由于海水生物毒性数据的欠缺,通常引入淡水数据加以补充,以此推导海水的预测无效应浓度(PNEC),但该方法所推导PNEC的“失真”程度目前尚未完全清晰。本研究选取了Pb、Cd、马拉硫磷和狄氏剂四种典型化合物,应用SSD模型方法比较分析了分别基于淡水生物和海水生物以及二者一并使用推导的PNEC值之间的差异性和相关性。结果发现:淡水生物与海水生物对各化合物响应的敏感性具有一定的差异。对于重金属,淡水物种可能对其胁迫更具敏感性,将淡水数据与海水数据一并使用所获得PNEC可有效的保护海洋生物;对于有机磷和有机氯农药,海水生物通常更具敏感性,淡水数据的介入和应用可能会对部分海洋生物造成部分“欠保护”现象,但总体上,淡水HC5与海水HC5二者相差不大,可通过适当的安全因子加以校正。
In the assessment of marine environmental risk and the establishment of environmental standards and standards, PNEC was deduced due to the lack of data on the biological toxicity of marine water and freshwater data were usually introduced. However, The degree of “distortion” is not yet completely clear. In this study, four typical compounds of Pb, Cd, malathion and dieldrin were selected. The differences between the PNEC values deduced from the combined use of freshwater organisms and seawater organisms and the combination of the two, respectively, were analyzed using the SSD model method And relevance. The results showed that there was a certain difference in the sensitivity of freshwater and marine organisms to the response of each compound. For heavy metals, freshwater species may be more susceptible to their stress. PNEC, a combination of freshwater data and seawater data, is effective for the protection of marine life; for organophosphorus and organochlorine pesticides, marine life is generally more sensitive to freshwater Intervention and application of data may result in partial “under-protection” of some marine organisms, but overall, freshwater HC5 and seawater HC5 are similar and can be corrected with appropriate safety factors.