中国苯的淡水水质基准研究

Freshwater quality criteria for benzene in China.

基于中国的水生生物区系特征,筛选出了33种水生生物的37个急性毒性数据和1个慢性毒性数据,涵盖了浮游植物类、鱼类、昆虫类、软体类和甲壳类。应用物种敏感度分布曲线法推导了适合中国淡水水体的苯的淡水水质基准,并对各类别生物的敏感性进行了分析。结果表明,中国淡水中苯的基准最大浓度为3.09mg.L-1,基准连续浓度为0.618mg.L-1,水中五大类生物对苯的敏感性顺序为:鱼类>甲壳类>昆虫类>软体类>浮游植物类。将中国各大水体中的苯浓度与推导出的基准值进行比较,结果发现,苯浓度尚未对中国水生态系统构成威胁,对水生生物的潜在风险不大。

Based on the characteristics of aquatic biota in China,37 acute toxic data and 1 chronic toxic data for 33 species of aquatic organisms,covering phytoplankton,fish,insect,crustacean,and mollusk,were screened.Benzene water criteria applying to Chinese fresh waters was derived using the species sensitivity distrubution method.The derived criteria maximum concentration and criteria continuous concentration for benzene in China fresh water were 3.09 and 0.618 mg·L-1,respectively,and the species sensitivity to the benzene followed the order of fish crustacean insect mollusk phytoplankton.A comparison of the benzene concentrations in China main water bodies and our derived criteria showed that the benzene concentration in China fresh water didn＇t threaten the China aquatic ecosystems yet,and had little potential risk to China aquatic organisms.