我国淡水生物菲水质基准研究

Development of freshwater aquatic life water quality criteria for phenanthrene in China

菲是一种国内外水体中普遍检出的优控多环芳烃,会对水生生物产生有害影响.然而,由于本土物种生态毒理学数据匮乏等问题,关于菲的基准阈值研究鲜有报道.本研究以9种本土水生生物为研究对象,进行了9种水生生物的急性生态毒理学实验及3种慢性生态毒理学实验并推导了菲的基准阈值.此外,基于物种敏感性分布法(species sensitivity distribution,SSD)对本地和非本地物种之间的差异进行了比较,以期探究美国水生生物毒性数据在我国本土基准阈值推导过程中的可行性.结果显示,采用US EPA"指南"推荐的方法对菲本土水生生物急性基准阈值(CMC)和慢性基准阈值(CCC)进行了推导,分别为0.033 mg·L^(-1)和0.012 mg·L^(-1);另外,本土与美国物种敏感性分布不存在显著性差异,这表明存在使用美国水生生物毒性数据来推导我国菲水生生物基准阈值的可能性.

Phenanthrene（PHE） is a priority polycyclic aromatic hydrocarbon（PAH） which is toxic to aquatic organisms.However,there has been no research dealing with water quality criteria（WQC） of PHE due to the shortage of its toxicity data of different taxonomic levels.In the present study,toxicity data were obtained from 9 acute and 3 chronic toxicity tests using 9 Chinese native aquatic lives from different taxonomic levels.Based on these data,the criterion maximum concentration and criterion continuous concentration were developed according to US EPA guidelines,and the values were0.033 mg·L^-1 and 0.012 mg·L^-1,respectively.Furthermore,differences of species sensitivity distributions（SSD） between native and non-native species were compared.Little difference in the sensitivity distribution between native and non-native species was observed,which indicates that using toxicity data of American species directly to derive the water quality criteria of PHE was possible.