纳米银在水生态食物链中的迁移和生物放大

项目名称： 纳米银在水生态食物链中的迁移和生物放大

项目编号： No.21307105

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 环境科学、安全科学

项目作者： 陈礼强

作者单位： 云南大学

项目金额： 26万元

中文摘要： 银纳米是世界上产量最大、应用最广的纳米材料，其大量排放将对生态环境构成巨大的潜在威胁。目前对纳米银的生物安全研究多集中在生物个体和细胞水平的毒性效应评估，缺乏对纳米银在生态食物链中迁移行为和生物放大等生态效应的认识。本项目拟以"水蚤-斑马鱼"为简单水生态食物链模型，通过考察水体暴露和食物链传递两条途径分别对纳米银在水蚤和斑马鱼体内各自的积累和迁移情况，分析其在水生态食物链中的生物积累指数（BAF）和生物放大指数（BMF），探讨纳米银在食物链中的迁移行为和积累过程，揭示纳米银在水生态食物链中的积累效应、迁移行为和生物放大效应规律。通过本研究，可判识纳米银在水生态食物链中的生物放大效应，阐明其在食物链中的积累和迁移机制，对揭示纳米银这类潜在新型污染物的环境行为和生态毒性效应机制具有重要理论价值，也可为其它纳米材料生态安全评估提供科学依据。

中文关键词： 纳米银；生态食物链；生物积累；生物放大；毒理机制

英文摘要： Silver nanoparticles (AgNPs) are emerging as one of the fastest growing products and the most widely used nanomaterials in the world. As the result, the potential hazards of AgNPs on the ecological environment is anticipated. Current research on the ecological impacts of silver nanoparticle has focused on the toxic effects at both biological individual level and cell level. Little is known about the biomagnifications and trophic transfer of AgNPs in freshwater food chain, despite the fact that the trophic transfer in freshwater food chain is considered to be a major pathway for AgNPs introduction into the environment. To begin addressing this knowledge gap, we will construct a simple freshwater food chain using the model organisms (Daphnia magna) and zebrafish（Danio rerio）to investigate the potential biomagnifications and trophic transfer of AgNPs. Two possible pathway of AgNPs transport in aquatic ecosystems including direct water column transport and food chain transfer will be investigated, and a group of ecology related indexes such as Bio-accumulation factor (BAF), Bio-magnification factor (BMF) will be measured to disclose the law of biomagnifications and cumulative effects of AgNPs in aquatic organisms, as well as their migration pathway in the simple freshwater food chain. Our study is expected to presen

英文关键词： silver nanoparticle；ecological food chain；bio-accumulation；bio-magnification；nano-toxicity mechanism