零价铁法处理含EDTA-Cu(Ⅱ)废水  

Removal of EDTA-Cu( Ⅱ) from Water by Zero-valent Iron

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作  者:林龙利 LIN Longli(College of Chemical Engineering, Guizhou University of Engineering Science Bijie, Guizhou 551700)

机构地区:[1]贵州工程应用技术学院化学工程学院,贵州毕节551700

出  处:《工业安全与环保》2017年第1期21-23,共3页Industrial Safety and Environmental Protection

基  金:贵州省普通高等学校煤化工过程装备与控制创新团队(黔教合人才团队字[2015]73);贵州省科技合作计划项目(黔科合LH字[2016]7056号);毕节学院高层次人才科学研究项目(院科合字G2013005号)

摘  要:为了探索含络合铜电镀废水的处理新方法,以废铁屑为材料,研究其去除EDTA-Cu(Ⅱ)的有效性和作用机制。对铁屑进行XRD表征的结果表明,铁屑中含有零价铁和少量碳,实验发现,铁屑对Cu(Ⅱ)和EDTA能同步去除,90 min的去除率分别达到93.51%,52.55%,且降低了体系的生物毒性,提高了生物降解性。对反应机制进行探讨,结果表明铁屑以直接还原、沉淀吸附和微电解作用实现对EDTA-Cu(Ⅱ)的有效去除。In order to explore the new method in treatment of electroplating wastewater containing copper complex,the effectiveness of degradation EDTA-Cu( Ⅱ) by using zero-valent iron( Fe^0) was studied,as well as its mechanism and products toxicity. Firstly,iron scraps were characterized by means of x-ray diffractometer( XRD),indicating the majority substance in the iron scraps was zero-valent iron,whereas with a small amount of zero-valent carbon( C^0). In addition,the effectiveness of iron scraps on degradation EDTA-Cu( Ⅱ) was investigated. Results showed that the bioavailability of acenaphthene changes constantly and iron scraps removed Cu(Ⅱ) and EDTA simultaneously,reaching 93. 51% and 52. 55% respectively in 90 minutes. Besides,the biological toxicity was reduced and the biodegradability improved at the same time. Finally,the study of mechanism showed that copper complex dissociates into free Cu^(2 +),then removed by iron scraps through direct reduction,precipitation adsorption and micro electrolysis. The results proved that iron scraps was an effective approach for the removal of chelated copper from waster.

关 键 词:零价铁 络合铜 发光菌 生物毒性 

分 类 号:X781.1[环境科学与工程—环境工程]

 

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