纳米二氧化钛与砷在藻-大型蚤食物链中的相互作用机制

项目名称： 纳米二氧化钛与砷在藻-大型蚤食物链中的相互作用机制

项目编号： No.41271484

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 罗专溪

作者单位： 中国科学院城市环境研究所

项目金额： 75万元

中文摘要： 纳米TiO2的风险研究是当前纳米材料健康与安全新兴研究的热点之一，也是目前国家纳米科技科学发展亟待解决的重要科学问题。迄今纳米TiO2与其它污染物在食物链中的相互作用研究极近空白，缺乏了解二者互作时如何影响污染物的生物有效性、累积和传递的作用机制。藻-大型蚤作为水生态系统的重要组成部分，砷在该食物链中的吸收累积及转化研究具有重要理论作用和实际价值。本项目围绕纳米材料与其它污染物相互作用的重要科学问题，多学科交叉，拟系统研究纳米TiO2与砷互作时藻、大型蚤的胁迫响应、藻-大型蚤食物链中砷、纳米TiO2含量、砷形态等变异特性，探明纳米TiO2对藻-大型蚤食物链中砷累积动力学的影响规律，查清纳米TiO2与砷互作时对藻和大型蚤的胁迫作用，揭示纳米TiO2与砷在藻-大型蚤食物链中的相互作用机制，促进对纳米TiO2与其它污染物相互作用规律的理解，提升纳米材料在环境中的健康与风险的认识。

中文关键词： 纳米颗粒；砷；生物有效性；形态分析；食物链

英文摘要： Nanotechnology is advancing rapidly and could soon become a trillion-dollar industry. Subsequently, release of substantial amount of engineered nanoparticles (ENPs) into the environment is inevitable. Understanding the safety, environmental and human health implications of nanotechnology-based products is of worldwide importance. Titanium dioxide nanoparticles (nano-TiO2) have attracted considerable attention because of their unique properties and widespread uses in suncreens, toothpastes, surface coatings, and water treatments. Currently, researches on the risk of nano-TiO2 are one of the critical topics about the health and safety of nanomaterials, and also are urgently significant issues during the scientific development of nanotechnology in our country and other worlds. However, little information, so far, is available for the interaction of nano-TiO2 with other pollutants in food chains. As a result, it is extremely unclear that the effects of the interaction on the bioavailability, bioaccumulation and transfer of other pollutants and its related mechanisms. The lack of this special researches needs to be make up due to the potential risk of nano-TiO2 in aquatic environment. Algae-dephnia is one of important food chains in aquatic environment, in which researches on the uptake, bioaccumulation and transfer

英文关键词： nanoparticle；Arsenic；Bioavailability；speciation analysis；food chain