现代地质2013，Vol.27Issue(2)：435-439,5.
溶解氧对零价铁去除水中六价铬的影响
Effects of Dissolved Oxygen on Removal of Cr (Ⅵ) by Zero-valent Iron
摘要
Abstract
Nanoscale zero-valent iron ( nZVI) is a kind of effective material for remediation of polluted soil and water. It can be used to remove hexavalent chromium, Cr ( VI) , which is toxic and easily mobile in the environment. In recent years, many researches have studied impacts of temperature, pH value, initial concentration, etc. in the systems, while dissolved oxygen (DO) is seldom to discuss. Herein, we compared zero-valent iron (ZVI) and nZVI for Cr ( VI) removal in the presence or absence of oxygen in water. We focused on the effect of DO on removal of Cr( VI) by nZVI. The short-term batch experiment showed that nZVI is significantly more effective in removing Cr ( VI) than ZVI due to large specific surface area and high activity of nano particles. Oxygen enhances Cr( VI) removal in water by nZVI in that more production of Fe 2+ , goethite, magnetite, etc. can be useful in this process and iron oxides can easily adsorb Cr( VI) on the surface of nZVI in the presence of oxygen.关键词
纳米零价铁/溶解氧/六价铬/吸附Key words
nanoscale zero-valent iron/ dissolved oxygen/ Cr( VI) / adsorption分类
天文与地球科学引用本文复制引用
曹茜,陈家玮..溶解氧对零价铁去除水中六价铬的影响[J].现代地质,2013,27(2):435-439,5.基金项目
中国地质调查局项目(1212011120288) （1212011120288）
中央高校基本科研业务费专项(2012123,2010ZD14) （2012123,2010ZD14）
国家"水体污染控制与治理"科技重大专项(2009ZX07424-002). （2009ZX07424-002）
