异化铁还原菌还原分解含As(Ⅴ)水铁矿:矿物生成动力学的制约  

The Reduction and Decomposition of Ferrihydrite Containing As(Ⅴ) by Dissimilatory Iron Reducing Bacteria:The Restriction of Mineral Formation Dynamics

作　　者：殷矫军 汪华明[1] 张鑫[1] 张勋[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《绿色科技》2015年第6期238-241,共4页Journal of Green Science and Technology

摘　　要：指出了砷早已被证明是一种剧毒的致癌物质,砷中毒情况日益严重,三价砷的毒性比五价砷的毒性大将近60倍。水铁矿是一种弱结晶的铁氢氧化物,具有极大的比表面积和高表面活性,可以通过吸附和共沉淀与地表水中的污染物质相互作用,故可利用合成水铁矿来去除废水中的污染物质。以人工合成的水铁矿-砷(Ⅴ)为实验对象,研究了样品在DIRB作用下Fe和As的释放情况,并探究其其物象转移,以期为含砷废水处理提供参考。结果表明:DIRB能够有效溶解水铁矿,并且As含量越多,样品制备时间越长越不利于Fe和As的释放。Arsenic has been proved to be a highly toxic carcinogen and arsenic poisoning becomes more serious day by day. The trivalent arsenic toxicity is almost 60 times of the general toxicity of arsenic. Ferrihydrite is a kind Qf weak crystalline iron hydroxide, which has a great specific surface area and high surface activity. Through adsorption and coprecipitation, it can interact with the surface water＇s pollutant. Therefore, the synthetic ferrihydrite can be used to remove the pollutants in wastewater. Based on the. synthetic ferrihydrite--arsenic （V） as the experimental object, the article studies the release of Fe and As when the sample is under the influence of DIRB~ and explores the image transfer, which aim to provide references for the treatment of wastewater containing arsenic. The results show that the DIRB can effectively dissolve ferrihydnte. In additiong when the content of As is increasi~ and the Sample preparation time is longer, it is adverse to the release of Fe and As.

关 键 词：水铁矿 砷矿物生成动力学 异化铁还原菌 还原分解 

分 类 号：X142[环境科学与工程—环境科学]