铜铝双金属材料对硝基苯废水的还原降解研究  

Study on the reductive degradation of nitrobenzene wastewater by copper-aluminum bimetallic material

作　　者：任鹏 刘旭 来文艳 葛保鑫 徐畅 来文娟 张大磊[1] 齐元峰 REN Peng;LIU Xu;LAI Wenyan;GE Baoxin;XU Chang;LAI Wenjuan;ZHANG Dalei;QI Yuanfeng(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao Shandong 266525;Weifang Qingzhou Ecological Environment Monitoring Center,Weifang Shandong 261000;Suzhou Genji Technology Co.,Ltd.,Suzhou Jiangsu 215131;Sinochem Environment Equipment Engineering(Jiangsu)Co.,Ltd.,Wuxi Jiangsu 214214)

机构地区：[1]青岛理工大学环境与市政工程学院,山东青岛266525 [2]潍坊市青州生态环境监控中心,山东潍坊261000 [3]苏州根基科技有限公司,江苏苏州215131 [4]中化环境设备工程(江苏)有限公司,江苏无锡214214

出　　处：《环境污染与防治》2024年第2期187-192,共6页Environmental Pollution & Control

基　　金：山东省重点研发计划项目(No.2020CXGC011204)。

摘　　要：以废旧铝箔为原料,采用化学镀铜的方式制备了铜铝双金属材料(Cu@Al^(0))并应用于硝基苯废水的还原降解。采用X射线衍射(XRD)、扫描电子显微镜(SEM)等手段对制备的材料进行表征,系统考察了镀铜率、初始pH、Cu@Al^(0)投加量、硝基苯初始浓度对硝基苯降解效果的影响,最后借助紫外可见吸收光谱(UV-Vis)和气相色谱(GC)进一步揭示了Cu@Al^(0)对硝基苯的还原降解机理。结果表明,金属铜可成功负载在铝箔表面,当铜负载率为3.43%,初始pH=3,Cu@Al^(0)投加量为0.50 g,硝基苯初始质量浓度为100 mg/L,反应时间为20 min时硝基苯的降解率可达88.4%,且Cu@Al^(0)具有良好的循环利用性能。Cu@Al^(0)对硝基苯的降解是从亚硝基苯到羟基苯胺再到苯胺的逐步还原过程,初始pH过高会影响中间产物亚硝苯进一步还原成最终产物苯胺。Copper-aluminum bimetallic material(Cu@Al^(0))was prepared by electroless copper plating on waste aluminum foil.The obtained Cu@Al^(0)was applied to reductive degradation of nitrobenzene wastewater.The prepared material was characterized by XRD and SEM.The effects of copper plating rates,initial pH,material dosage and initial nitrobenzene concentration on nitrobenzene degradation efficiency were systematically investigated.Finally,the reductive degradation mechanism of Cu@Al^(0)for nitrobenzene was further revealed by UV-Vis and GC instrumental analysis methods.The results showed that copper was successfully loaded on the surface of the aluminium foil.When the copper loading rate of Cu@Al^(0)was 3.43%,initial pH was 3,material dosage was 0.50 g,initial mass concentration of nitrobenzene was 100 mg/L,nitrobenzene degration rate could reach 88.4%after 20 min of reaction.The degradation of nitrobenzene by Cu@Al^(0)was a stepwise reduction process from nitrosobenzene to hydroxyaniline and finally to aniline.An increase of the initial pH affected the reduction process of intermediate product nitrosobenzene to the final product aniline.

关 键 词：铜铝双金属材料 硝基苯废水 还原机理 

分 类 号：X703[环境科学与工程—环境工程]