摘要
水质基准是制定水环境质量标准,以及评价、预测和控制与治理水体污染的重要依据。为了系统分析水体硬度、物种门类和地域条件对水质基准的影响,本研究筛选了6门20科25种水生生物的毒性数据,用毒性百分数排序法推导了中国银的淡水生物水质基准。研究结果表明,银的基准最大浓度(CMC)与水体硬度呈幂函数关系,等式为CMC=0.85×e[0.62ln(水体硬度)-4.28]μg·L-1,基准连续浓度为0.02μg·L-1。中国和美国2个不同生物区系研究都表明低等生物(无脊椎动物)比高等生物(脊椎动物)对银离子的毒性更为敏感。由地域条件引起的生物区系和敏感物种差异及基准推导方法的不同也会影响水质基准值。
Water quality criteria are important basis for the establishment of water quality standards, as well as the assessment, prediction and control of water pollution. In the present study, toxicity data of 25 aquatic species from 20 taxonomic families and 6 phyla were screened with toxicity percentile rank method to obtain the water quality criteria of silver to protect freshwater biota. The results showed that, there was a power function relationship between criteria maxinum concentration （CMC）of silver and water hardness with equation CMC=0.85 ×^[0.62]ln（水体硬度）-4.28]μg· L^-1. The criteria continuous concentration was 0.02 μg· L^-1. Silver ions might show more toxicity to lower trophic level organisms （invertebrate） than higher trophic level organisms （vertebrate） from the toxicity data of local biota in China and USA. The differences of biota and sensitive species caused by the geographical conditions as well as the different criteria derivation method can also affect water quality criteria value.
出处
《生态毒理学报》
CAS
CSCD
北大核心
2015年第1期235-244,共10页
Asian Journal of Ecotoxicology
基金
国家自然科学基金(41173084
21102079)
关键词
银
淡水生物
水质基准
硬度校正
物种门类
生物区系
毒性百分数排序法
silver
freshwater organism
water quality criteria
hardness correction
species categories
biota
toxicity percentile rank method
