不锈钢丝刷电极电解还原硝基苯废水  

Reduction of Nitrobenzene Wastewater by Electrolysis Using Stainless Steel Brush as Cathode

作　　者：陈凌峰[1] 谭巧巧 朱梅萍[1] 李玉红[1] 

机构地区：[1]常熟理工学院化学与材料工程学院,江苏常熟215500

出　　处：《常熟理工学院学报》2014年第2期56-61,共6页Journal of Changshu Institute of Technology

基　　金：常熟理工学院本科毕业设计(论文)重点资助课题"不锈钢丝电极电解处理硝基苯废水机理研究"

摘　　要：研究了以石墨电极作阳极、不锈钢丝刷为阴极、Na2SO4为电解质,采用不同电解电压(20 V、5 V)对模拟硝基苯(NB)废水进行电解.测量了不同电解时间溶液的紫外光谱,结果表明:20 V电压时,硝基苯被还原为苯胺(AN);而5 V电压时,产物除苯胺外,可能还有马来酸、对氨基苯酚、对苯二酚等.对20 V电解电压的体系,采用双波长等吸收消除干扰法求解出不同电解时间混合体系中硝基苯和苯胺各自的含量;而对5 V的电解体系,采用萘乙二胺偶氮光度法来测定电解处理后废水中苯胺和硝基苯的含量.结果显示,随着电解电压的下降,除产物成分变化外,硝基苯转化率、最大转化率需要的时间也发生变化.This paper investigates the reduction of nitrobenzene wastewater by electrolysis using graphite as an-ode, stainless steel brush as cathode, and Na2SO4 as electrolyte. The electrolytic voltage is set at 20 V and 5 V, respectively. The UV spectra of the result solution show that, when the voltage is 20 V, nitrobenzene is reduced to aniline, whereas when the voltage is 5 V, the products may have maleic acid, p-aminophenol and hydroqui-none. The concentration of nitrobenzene and aniline in the 20 V-electrolytic system is resolved from the UV spectra using dual-wavelength equal-absorbance UV method. However, the concentration in the 5 V-electrolytic system is determined by spectrophotometry with N-（1-Naphthyl）-ethylenediamine. It is shown that the conver-sion rate of nitrobenzene and the time needed for achieving the highest conversion rate, as well as the product, change with the decreasing of the electrolytic voltage.

关 键 词：硝基苯 电解 双波长等吸收紫外光谱法 萘乙二胺偶氮光度法 

分 类 号：X131[环境科学与工程—环境科学] X132