离子强度对臭葱石结晶和固砷效率的影响研究  

Study on the effect of ionic strength on the crystallization process of scorodite and fixation of arsenic

作　　者：苏瑞 祁宝川 赵丽红[1] 高艳娇[1] SU Rui;QI Bao-chuan;ZHAO Li-hong;GAO Yan-jiao(College of Civil Engineering and Architecture,Liaoning University of Technology,Jinzhou 121001,China;School of Chemistry and Environmental Science,Yili Normal University,Yining 835000,China)

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001 [2]伊犁师范大学化学与环境科学学院,新疆伊宁835000

出　　处：《应用化工》2022年第11期3207-3211,3216,共6页Applied Chemical Industry

基　　金：国家自然科学基金面上项目(42173063);辽宁工业大学博士科研启动基金项目(XB2021013);新疆维吾尔自治区教育厅高校科研计划项目(XJEDU2021Y045);辽宁省教育厅高校基本科研项目(JZL202015406)。

摘　　要：采用臭葱石(FeAsO_(4)·2H_(2)O)沉淀法处理有色冶炼含砷污酸,研究离子强度对污酸除砷效率和臭葱石结晶的影响,并对影响机理进行了阐述。实验表明,污酸离子强度的增加仅会短暂降低砷的去除速率,即使在较高的离子强度下,最终砷的去除效率也可达~98%。XRD、SEM、IR及Raman表明,离子强度的增加仅对臭葱石结晶速率具有降低的趋势,但不影响臭葱石最终的结晶,表明臭葱石法对高离子强度的含砷污酸具有很好的固砷作用。Scorodite(FeAsO_(4)·2H_(2)O) precipitation method is used for the non-ferrous metallurgy arsenic-containing wastewater,a study on the effect of ionic strength on the removal efficiency of arsenic from wastewater and crystallization of scorodite,and the reaction mechanism is explained.The experiments have shown that ionic strength only affects the removal efficiency of As,arsenic removal efficiency of~98%even at higher ionic strength.XRD,SEM,IR and Raman show that ionic strength only decrease the rate of crystallization of scorodite,and does not affect the final crystallization of scorodite.The result show that the scorodite precipitation method has a good arsenic fixation ability for high ionic strength arsenic-containing wastewater.

关 键 词：含砷污酸 臭葱石 固砷 离子强度 

分 类 号：TQ13[化学工程—无机化工] X756[环境科学与工程—环境工程] X52X78