醇水体系制备纳米Pd/Fe颗粒去除水中2,4-DCP  

Removal of 2,4-DCP from water by preparation of nano-Pd/Fe particles by alcohol water system

作　　者：张永祥[1] 白冰 杨文静 郭汶俊 李雅君 ZHANG Yong-xiang;BAI Bing;YANG Wen-jing;GUO Wen-jun;LI Ya-jun(Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering,College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China;Zhengzhou Branch of Tianjin Municipal Engineering Design and Research Institute,Zhengzhou 450000,China)

机构地区：[1]北京工业大学建筑工程学院水质科学与水环境恢复工程北京市重点实验室,北京100124 [2]天津市市政工程设计研究院郑州分院,河南郑州450000

出　　处：《应用化工》2021年第3期565-570,共6页Applied Chemical Industry

基　　金：国家重点研发计划(2016YFC0401404);北京市科委项目(Z16110000451605)。

摘　　要：为了提高纳米铁的活性和分散性,在醇水体系下制备出纳米钯铁(Pd/Fe)双金属颗粒并表征,将制得的纳米Pd/Fe颗粒应用于水中2,4-二氯苯酚(2,4-DCP)的去除,考察了材料投加量、反应温度、初始pH值、2,4-二氯苯酚初始浓度等因素对2,4-DCP去除的影响,分析了2,4-DCP的去除机理并进行动力学拟合。结果表明,在醇水体系中制备纳米铁有利于纳米颗粒的稳定分散;钯的加入将脱氯途径转变为催化加氢,极大改善了2,4-DCP的去除效果;当2,4-DCP初始浓度为20 mg/L、反应温度30℃、纳米Pd/Fe颗粒投加量为2 g/L时,2,4-DCP可在5 h内去除99.9%;反应过程符合修正的一级反应动力学方程。In order to improve the activity and dispersion of nano-iron,nano-palladium-iron bimetallic particles were prepared and characterized in alcohol water system,and the prepared nano-Pd/Fe particles were applied to remove 2,4-dichlorophenol in water.The effects of material addition,reaction temperature,initial pH value,initial concentration of 2,4-dichlorophenol and other factors on 2,4-DCP removal were investigated,and the removal mechanism of 2,4-DCP was analyzed and kinetic fitting was performed.The results show that the preparation of iron nanoparticles in alcohol water system is beneficial to the stable dispersion of nanoparticles.The addition of palladium transformed the dechlorination pathway into catalytic hydrogenation,which greatly improved the removal effect of 2,4-DCP.When the initial concentration of 2,4-DCP was 20 mg/L,the reaction temperature was 30℃,and the dosage of Pd/Fe nanoparticles was 2 g/L,2,4-DCP could be removed 99.9%within 5 h.The reaction process conforms to the modified first order reaction kinetic equation.

关 键 词：2 4-二氯苯酚 醇水体系 钯铁 加氢脱氯 

分 类 号：TQ027.36[化学工程] TQ050.41