溶解性有机碳组成对生物配体模型预测Cu毒性的影响  

Influence of Dissolved Organic Carbon Composition on Prediction of Copper Toxicity to Medaka by Biotic Ligand Model

作　　者：王春艳[1,2] 陈浩[2] Kuen Benjamin Wu 郑丙辉[2] 安立会[2] 

机构地区：[1]武汉大学资源与环境科学学院,武汉430072 [2]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012 [3]美国HydroQual环境咨询有限公司,美国新泽西07430

出　　处：《生态毒理学报》2013年第4期629-633,共5页Asian Journal of Ecotoxicology

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07528)

摘　　要：为揭示溶解性有机碳(DOC)的组成对生物配体模型(BLM)预测铜的生物毒性准确性的影响,研究了不同浓度黄腐酸(FA)、腐殖酸(HA)和两者不同浓度比例混合物影响铜对青鳉急性毒性。结果表明:在相同水质条件下,黄腐酸或腐殖酸浓度增加时,铜对青鳉的LC50均增加;两者共存时,当腐殖酸质量百分比从10%增至90%时,铜对青鳉的LC50也增加。当天然水中DOC的组成不确定时,可假设HA和FA的组成比例为1∶1,此时BLM预测铜对青鳉的LC50的偏差最小。To study the influence of the composition of dissolved organic carbon （DOC） on predicting the uncertainty of copper toxicity by the biotic ligand model （BLM）, three sets of toxic bioassays were performed to study the influences of humic acid （HA） and fulvic acid （FA） at different concentrations, and various mixtures of both HA and FA on copper acute toxicity to medaka. The results indicated that LC50 of copper to medaka increased with the concentration of HA or FA increasing in same water. As the weight percent of HA added from 10% to 90% when HA and FA in the same water, LC50 of copper to medaka also increased. To natural waters with unknown DOC compositions, when the ratio of HA and FA was assumed to be 1：1, the predicted LC50 by BLM would be optimized.

关 键 词：溶解性有机碳 黄腐酸 腐殖酸 生物配体模型 铜 青鳉 

分 类 号：X171.5[环境科学与工程—环境科学]