漂珠负载纳米铁镍去除水中2,4-DCP的试验研究  

Study on the removal of 2,4-dichlorophenol in water by cenosphere of fly ash loaded with nZVI/Ni nanoparticles

作　　者：杨文静 张永祥[1] 林钰辉 李雅君 YANG Wen-jing;ZHANG Yong-xiang;LIN Yu-hui;LI Ya-jun(Beijing Key Laboratory of Water Quality Science and Water Environment Recovery,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124

出　　处：《应用化工》2023年第1期28-33,共6页Applied Chemical Industry

基　　金：国家重点研发计划(2016YFC0401404)。

摘　　要：利用碱水热处理的粉煤灰漂珠,通过超声辅助液相还原法制备了漂珠负载纳米铁镍(CFA-nZVI/Ni)并进行表征。同时探究了2,4-DCP初始浓度、pH值、反应温度、材料投加量等因素对2,4-DCP去除的影响并考察复合材料的易回收能力。结果表明,纳米铁镍成功负载于漂珠表面且分散性良好,并且复合材料具备漂浮性,可减少回收纳米材料的难度;CFA-nZVI/Ni增强了nZVI/Ni对2,4-DCP的去除能力,当2,4-DCP初始浓度为20 mg/L,初始pH值为6,温度为25℃,材料投加量为3.0 g/L时,2,4-DCP可在180 min内完全去除;反应过程符合修正的一级反应动力学方程。With the use of alkali-hydrothermally treated cenosphere of fly ash, CFA-loaded iron-nickel bimetal nanoparticles(CFA-nZVI/Ni)were prepared through ultrasound-assisted liquid-phase reduction and the material was characterized.The effects of initial 2,4-DCP concentration, pH, reaction temperature and material dosage on the removal of 2,4-DCP were investigated and the easy recyclability of the composite material were examined.The results showed that nZVI/Ni were successfully loaded on the surface of CFA with good dispersion, and the composite materials had floating properties that made it less difficult to recycle nanomaterials.CFA-nZVI/Ni Enhanced the ability of nZVI/Ni to remove 2,4-DCP.When the initial concentration of 2,4-DCP was 20 mg/L,the initial pH was 6,the temperature was 25 ℃ and the material was dosed at 3.0 g/L,2,4-DCP was completely removed within 180 min.The reaction process conforms to the modified first order reaction kinetic equation.

关 键 词：漂珠 纳米双金属 铁镍 2 4-二氯酚 

分 类 号：TQ027.36[化学工程] X523[环境科学与工程—环境工程]