摘要
铜是生命体必需的一种微量元素,当铜的浓度超过一定范围时,又会对机体产生一定的毒害作用。为了有效控制铜给水生生物带来的不利影响,亟需开展铜的水质基准研究工作。以我国淡水生态系统为保护对象,收集和筛选了淡水水体中的生物物种和相应的毒性数据。用评价因子法、毒性百分数排序法和物种敏感度分布法分别推导了我国铜的淡水生物水质基准。结果表明,用评价因子法得出的铜的基准值为2.00μg·L-1;用毒性百分数排序法得出的铜的基准最大浓度和基准连续浓度分别为9.10和5.63μg·L-1;用物种敏感度分布法得出的保护95%物种的铜的短期危险浓度和长期危险浓度分别为30.00和9.44μg·L-1。3种方法得到的铜的水质基准值存在一定的差异性。通过比较分析,推荐采用物种敏感度分布法作为铜的基准推导的首选方法。研究结果对我国水质基准的制定具有一定的参考价值。
Copper （Cu） is an essential trace element in life bodies. When the dose of Cu exceeds a certain content, it may cause adverse effects on the organisms. In order to effectively control the adverse effects of Cu on aquatic life in Chinese freshwaters, it is urgent to derive aquatic life freshwater quality criteria of Cu. For the purpose of protection of freshwater ecosystem in China, the freshwater species and the relative toxicity data were collected and screened. Then three common methods including assessment factor method, toxicity percentile rank method and species sensitivity dis- tribution method were used to derive aquatic life ambient freshwater quality criteria of Cu. The result showed that, the freshwater quality criteria of Cu was derived to be 2.00 txg＂ L l using assessment factor method; the derived criteria maximum concentration （CMC） and criteria continuous concentration （CCC） were 9.10 and 5.63 p.g. L1, respectively, using toxicity percentile rank method; the short term hazardous concentration and long term hazardous concentration to protect 95% species were derived to be 30.00 and 9.44 p^g. L 1, respectively, using species sensitivity distr^ution method. Based on the above, some difference existed in the criteria values derived by different methods. After the ex- tensive comparison, the species sensitivity distr^ution method was recommended as the primary method for derivingcriteria of Cu. This study might provide data support for deriving water quality criteria for protecting aquatic biota in China.
出处
《生态毒理学报》
CAS
CSCD
2011年第6期617-628,共12页
Asian Journal of Ecotoxicology
基金
国家重点基础研究发展计划"湖泊水环境质量演变与水环境基准"(973项目)(No.2008CB418200)
关键词
铜
水质基准
评价因子法
毒性百分数排序法
物种敏感度分布法
Cu
aquatic quality criteria
assessment factor method
toxicity percentile rank method
species sensitivitydistr^ution method
