UV/Fenton法处理EDTA-Cu-Ni络合废水  

Treatment of EDTA-Cu-Ni wastewater by UV/Fenton method

作　　者：王开峰[1,2] 彭娜[1] 李鑫[1] 严植准 李秀霞[1] 卢桂宁[2,3] WANG Kaifeng PENG Na ＊ LI Xin YAN Zhizhun LI Xiuxia LU Guining(Faeuhy of Chemistry and Environment, Jiaying University, Meizhon 514015, China School of Environmental and Energy, South China University of Technology, Guangzhou 510006, China The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China)

机构地区：[1]嘉应学院化学与环境学院,梅州514015 [2]华南理工大学环境与能源学院,广州510006 [3]工业聚集区污染控制与生态修复教育部重点实验室,广州510006

出　　处：《环境工程学报》2016年第11期6524-6528,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21377031);广东省自然科学基金资助项目(2014A030313620;S2013010013723);广东省科技计划项目(2014A020216050);广东省人文社科省市共建重点研究基地项目(13KYKT03)

摘　　要：为了探索络合态重金属废水的处理方法,采用UV/Fenton氧化技术处理EDTA-Cu-Ni模拟废水,主要研究了Fe^(2+)投加量、H_2O_2投加量、初始pH和UV光照时间等因素对COD、Cu^(2+)和Ni^(2+)去除效果的影响及机理。结果表明,随着Fe^(2+)和H_2O_2投加量以及初始pH的升高,COD、Ni^(2+)的去除率先升后降,Cu^(2+)的去除率则在升高后趋于稳定;随着UV光照时间的增加,COD、Cu^(2+)、Ni^(2+)去除效率均呈上升趋势并逐渐达到平衡。结合成本和效率考虑,得出最佳处理条件为:Fe^(2+)投加量为10 mmol·L-1,H_2O_2投药量为600 mmol·L^(-1),反应初始pH为3.0,UV光照时间为120 min。在UV/Fenton体系中,UV光照能增强Fenton反应的去除效率,异丙醇对反应的抑制说明羟基自由基在处理过程中是重要的活性物种。To explore novel methods for the treatment ofcomplex heavy metal wastewater,the UV / Fenton oxidation was investigated for the removal of EDTA-Cu-Nifrom simulated wastewater. The effects of Fe^（2＋）dosage,H_2O_2 dosage,initial pH,and UV exposure timeon the removal of chemical oxygen demand（ COD）,Cu^（2＋）,and Ni^（2＋）were investigated. COD and Ni^（2＋）removal rates increased with an increase in Fe^（2＋）dosage,H_2O_2 dosage,andinitial pH,while that of Cu^（2＋）increased initially and then became stable. Similarly,with increasing UV exposure time,the removal rates of COD,Cu^（2＋）,and Ni^（2＋）increasedbefore becoming stable. Considering the treatment cost and removal efficiency,the optimal conditionsproposed were as follows： Fe^（2＋）dosage = 10 mmol·L-1,H_2O_2 dosage = 600 mmol·L-1,initial pH = 3. 0,and UV exposure time = 120 min. In addition,in the UV/Fenton system,UV exposure enhanced the removal efficiency of the Fenton reaction. Furthermore,reaction inhibitionby isopropanol suggested that the hydroxyl radical was the main reactive species in thistreatment process.

关 键 词：UV/FENTON 络合态重金属 羟基自由基 

分 类 号：X703.1[环境科学与工程—环境工程]