天然水环境中纳米银的来源、分析与转化

doi:10.13287/j.1001-9332.201706.011

摘要/Abstract

摘要： 纳米银(AgNPs)作为当前应用最广的金属纳米材料之一,可通过各种途径进入水土环境,对水生生物产生毒性,从而破坏水体生态环境.天然水体成分复杂,纳米银具有纳米材料特殊的理化性质,使得其在水体中的转化过程变得尤为复杂,因此理解纳米银在水环境中的转化与归趋,对于水质管理与生态环境保护极其重要.现代科技的发展为更好地研究纳米银在进入环境中后的溶解、聚凝等一系列转化过程提供了可能.本文概述了环境中纳米银的来源和环境风险,分析了pH、溶解氧、离子强度等环境因素及粒径、涂层等自身因素对其在水体环境中转化的影响,并归纳了对纳米银的粒径、电位及形貌等分析的主要技术手段.最后指出了当前研究中存在的主要不足,并对今后的研究方向进行了展望.

Abstract: Silver nanoparticles (AgNPs) as one of the most widely used metal nanomaterials can enter soil and water environment via various pathways, exert toxicity on water-borne organisms and deteriorate the aquatic eco-environment. With complex composition of natural water, the physicochemical property of AgNPs as nano materials makes their transformation process more complicated in water system. Therefore, understanding of the fate and transport of AgNPs in aqueous environment is extremely important for water quality management and protection of the eco-environment. Deve-lopment of modern science and technology has made it possible to study the process of the dissolution of AgNPs in environment. This paper summarized the source and risk of AgNPs in environment, analyzed impacts of environmental factors such as pH, dissolved oxygen, ionic strength and intrinsic factors of AgNPs such as particle size and coating on the AgNPs transformation in water environment, and summarized the main analytical techniques for the AgNPs size, potential and morphology. Finally, this paper pointed out the major research gaps in the current research and provided prospective for the future research.

杨悦锁, 王晨, 袁雪梅, 安长伟, 杨新瑶. 天然水环境中纳米银的来源、分析与转化[J]. 应用生态学报, 2017, 28(6): 2073-2082.

YANG Yue-suo, WANG Chen,YUAN Xue-mei, AN Chang-wei, YANG Xin-yao. Silver nanoparticles in natural water environment: Source, analysis and transformation[J]. Chinese Journal of Applied Ecology, 2017, 28(6): 2073-2082.

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