应用生物配体模型研究湘江水体中铜的生物有效性Study on Bioavailability of Cu to Medaka in Xiangjiang with Biotic Ligand Model
王春艳;陈浩;郑丙辉;安立会;
摘要(Abstract):
为评估湘江水体中铜的生物有效性,通过铜对青鳉的急性毒性实验确定铜对青鳉的半致死浓度(LC50),然后利用生物配体模型(Biotic Ligand Model,BLM)确定青鳉的累积半致死浓度(LA50)。同时对湘江水样的预测结果表明,铜对青鳉的LA50为12.43 nmol·gw-1;BLM预测的与实验观测的LC50差异倍数小于2,表明BLM预测结果比较准确。在此基础上预测铜对青鳉LC50预测范围为344.70~761.96μg·L-1。湘江各点水质最终急性值(FAV)相差不大(11.04~14.25μg·L-1),但水中溶解态铜含量相差较大(0.29~10.48μg·L-1),同时毒性单位值(TU)相差较大(0.06~1.48μg·L-1),其中最小值在舂陵水入湘江下游采样断面,最大值在株洲断面。在全部调查断面中,只有株洲断面TU大于1(1.48),说明株洲断面水中铜含量超过了该断面水中BLM确定的水质基准的1.48倍。
关键词(KeyWords): 生物配体模型(BLM);湘江;铜;半致死浓度(LC50);青鳉
基金项目(Foundation): 国家水体污染控制与治理科技重大专项(2009ZX07528)
作者(Author): 王春艳;陈浩;郑丙辉;安立会;
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DOI:
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