摘要
采用溶胶-凝胶法制备了Fe_(3)O_(4)、CoFe_(2)O_(4)、CuFe_(2)O_(4)、NiFe_(2)O_(4)、MnFe_(2)O_(4)等5种尖晶石磁性颗粒,并研究了其作为催化剂非均相Fenton氧化柠檬酸镍的效果。结果表明CoFe_(2)O_(4)的催化活性明显高于其他4种磁性颗粒,且具有较好的循环稳定性。以CoFe_(2)O_(4)为催化剂,研究了非均相Fenton反应的最佳条件。对于含0.5 mmol/L柠檬酸镍的废水,在初始pH为3、催化剂投加量为0.3 g/L、30 mmol/L H_(2)O_(2)分3批次平均投加的情况下,柠檬酸镍的去除率可达97%,进一步加碱沉淀可去除废水中99%以上的镍。
Five kinds of spinel magnetic particles i.e.Fe_(3)O_(4),CoFe_(2)O_(4),CuFe_(2)O_(4),NiFe_(2)O_(4),and MnFe_(2)O_(4) were prepared by sol-gel method,and their use as a catalyst for heterogeneous Fenton oxidation of nickel citrate was studied.The results showed that the catalytic activity of CoFe_(2)O_(4) was much higher than the other 4 kinds of magnetic particles,and CoFe_(2)O_(4) also had good reusability.The optimal conditions of heterogeneous Fenton oxidation for nickel citrate with a concentration of 0.5 mmol/L when using CoFe_(2)O_(4) as catalyst were studied.The removal efficiency of nickel citrate reached up to 97% by dosing 10 mmol/L of H_(2)O_(2) for 3 times in the presence of 0.3 g/L of catalyst at an initial pH of 3,and more than 99%of nickel was removed by further precipitation with alkali.
作者
贺框
黄凯华
胡小英
任艳玲
张明杨
杜建伟
温勇
HE Kuang;HUANG Kaihua;HU Xiaoying;REN Yanling;ZHANG Mingyang;DU Jianwei;WEN Yong(South China Institute of Environmental Sciences,Guangzhou 510655,China)
出处
《电镀与涂饰》
CAS
北大核心
2022年第21期1552-1557,共6页
Electroplating & Finishing
基金
国家重点研发计划(2018YFC1800306)
生态环境部华南环境科学研究所生态环境修复技术研究中心青年创新基金项目(hx-201209-002)
关键词
尖晶石磁性颗粒
非均相体系
柠檬酸镍
芬顿氧化
废水处理
magnetic spinel particle
heterogeneous system
nickel citrate
Fenton oxidation
wastewater treatment
