铜的形态分布与Daphnia magna急性毒性关系  

RELATIONSHIP BETWEEN COPPER SPECIATION AND ACUTE TOXICITY TO DAPHNIA MAGNA

作　　者：刘清[1] 王子健[1] 汤鸿霄[1] 

机构地区：[1]中国科学院生态环境研究中心国家重点环境水化学实验室,北京100085

出　　处：《环境化学》1998年第1期14-18,共5页Environmental Chemistry

摘　　要：本文利用化学平衡模式MINTEQA2研究不同酸度、碱度和有机配体存在下铜的形态分布特点,通过Daphnia magna毒性试验获得形态变化时的毒性变化规律.结果显示:无论是总量(无机形态总量),还是游离态浓度,都不能反映出铜的毒性大小.为此我们提出用活性态浓度来表征铜的毒性大小,较好地解释了不同体系中铜的毒性变化规律.The influences of pH, alkalinity, and EDTA on speciation of copper was modeled with MINTEQA2 software. The influence of copper speciation on toxicity was assayed by Daphnia magna test. The results show that toxicity of copper was attributed to Cu2+,CuOH+,and Cu (OH)2 (aq) ,not to Cu (CO3)2,CuHCO3,and CuEDTA complex. The results from different treatments can be explained by an empirical expression TP= 4.05 + 2. 86 Ig[Cu* ],where TP is toxic probity and [Cu* ] is defined as 'active copper species' ([Cu*]=[Cu2+]+0.75[CuOH+]+0.70[Cu(OH)2(aq)]).

关 键 词：铜 形态分析 生物毒性 水质标准 水质监测 

分 类 号：TG146.11[一般工业技术—材料科学与工程] X832.02[金属学及工艺—金属材料]