硼掺杂金刚石薄膜电化学氧化处理对硝基苯酚  

Electrochemical oxidation of p-nitrophenol on boron-doped diamond film electrode

作　　者：江晶[1] 崔兆伦 张楚燕 黄楠[2,3] JIANG Jing;CUI Zhaolun;ZHANG Chuyan;HUANG Nan(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China;Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]中国科学院金属研究所沈阳材料国家研究中心,辽宁沈阳110016 [3]中国科学技术大学材料科学与工程学院,辽宁沈阳110016

出　　处：《工业水处理》2025年第3期157-164,共8页Industrial Water Treatment

基　　金：辽宁省“揭榜挂帅”科技攻关项目(2021JH1/10400031);辽宁省中试基地中试验证类项目(2022JH24/10200033)。

摘　　要：对硝基苯酚废水具有高化学需氧量(COD)、生物危害性和难降解性等特点,采用传统方法难以高效处理。利用硼掺杂金刚石(BDD)薄膜电化学氧化法降解对硝基苯酚。考察了电流密度、溶液流量和对硝基苯酚初始质量浓度对对硝基苯酚降解效果的影响,发现随着电流密度、溶液流量增大,对硝基苯酚去除率增加;而随着对硝基苯酚初始质量浓度增加,对硝基苯酚去除率反而减小。利用叔丁醇和甲醇作猝灭剂验证羟基自由基(·OH)和硫酸根自由基(SO_(4)·-)的活性作用,发现添加叔丁醇和甲醇猝灭剂后,对硝基苯酚去除率从99.5%下降至76.2%和56.2%。利用液相色谱-质谱联用仪(LC-MS)对不同初始质量浓度对硝基苯酚降解过程的中间产物进行了检测,确定降解路径主要由·OH取代硝基并加成直至不稳定裂环。通过检测对硝基苯酚降解过程中COD的变化,计算电流效率和能耗,分析BDD薄膜电极电化学氧化处理对硝基苯酚的经济性,并提出未来的研究方向。p-nitrophenol wastewater is characterized by high chemical oxygen demand(COD),biological hazard and refractory degradation,which is difficult to be treated efficiently using traditional methods.In this paper,the borondoped diamond(BDD)thin film electrode was employed for the degradation of p-nitrophenol.The effects of current density,flow rate and initial concentration of p-nitrophenol on the degradation of p-nitrophenol were investigated.It indicated that the degradation efficiency increased with higher current density and higher flow rate,but decreased with the increase of initial concentration.Methanol and tert-butanol were used as quenchers to verify the activity of hydroxyl radicals and sulfate radicals.After adding quenchers,the removal rate of p-nitrophenol dropped from 99.5%to 76.2%and 56.2%.Liquid chromatography-mass spectrometry(LC-MS)was conducted to detect the intermediate products of the degradation process with different initial concentrations of p-nitrophenol.The identified degradation pathways consisted of the substitution of hydroxyl radicals for nitro and addition to the benzene ring until the ring splitting.The economics of electrochemical oxidation on BDD electrode were analyzed by calculating current efficiency and energy consumption from detecting COD value,and the ways for future research were proposed.

关 键 词：硼掺杂金刚石 电化学 水处理 对硝基苯酚 

分 类 号：X703.1[环境科学与工程—环境工程]