金刚石与磨料磨具工程2025，Vol.45Issue(6)：769-778,10.DOI:10.13394/j.cnki.jgszz.2024.0185
WC-Co/BDD电极在染料废水降解脱色中的应用
Study of degradation and decolorization of dye wastewater by WC-Co/BDD electrode
摘要
Abstract
Objectives:The objective of this study is to investigate the degradation and decolorization efficiency of four target pollutants-reactive red X-3B,alizarin red,methylene blue,and malachite green-using boron-doped dia-mond(BDD)electrodes synthesized on WC-Co substrates.Specifically,the study aims to optimize operational condi-tions,including voltage,electrolyte type and concentration,and pH,for effective treatment of dye-contaminated wastewater.The goal is to assess the performance of WC-Co/BDD electrodes in terms of decolorization,mineralization(via COD removal),and their comparative efficiency in treating different dyes.Methods:BDD films are synthesized on WC-Co substrates through a hot filament chemical vapor deposition(HFCVD)method,combined with a dynamic boron doping process.The physical properties of the films are characterized using field emission scanning electron micro-scopy(FE-SEM)and Raman spectroscopy.The degradation and decolorization of four dye pollutants(reactive red X-3B,alizarin red,methylene blue,and malachite green)are investigated under varying operational parameters,including voltage(4-8 V),supporting electrolyte type(Na2SO4 and NaCl)and its concentration(0-12 g/L),and pH(2-13).The treated water samples are analyzed using UV-visible spectrophotometry and a multi-parameter water quality analyzer to measure decolorization and mineralization efficiency(COD removal).Results:The results indicates that the optimal voltage for the degradation of all four dye solutions ranged from 6-7 V.While using NaCl as the supporting electrolyte resulted in faster treatment efficiency,it also produces environmentally harmful chlorinated by-products.In contrast,Na2SO4 provides greater stability and is more environmentally friendly as an electrolyte for the four dye wastewater samples.Furthermore,the ideal concentration of Na2SO4 and the optimal pH varies depending on the molecular struc-ture of each dye.Specifically,the optimal Na2SO4 concentrations are found to be 4-8 g/L for reactive red X-3B,4 g/L for alizarin red,8 g/L for methylene blue,and 2 g/L for malachite green.The optimal pH values are determined to be 2 for reactive red X-3B,5 for alizarin red,and 7 for both methylene blue and malachite green,respectively.At the optim-ized conditions for each dye,repeated degradation experiments demonstrate that at a charge of 4 Ah/L,the COD remov-al rates are over 97%for reactive red X-3B,methylene blue,and malachite green.Alizarin red shows higher oxidation resistance,with a COD removal rate of approximately 70%.Conclusions:The degradation difficulty order for the dyes is found to be:reactive red X-3B<malachite green<methylene blue<alizarin red.Also,the study confirms that WC-Co/BDD electrodes can effectively degrade and mineralize dye pollutants,demonstrating performance comparable to BDD electrodes based on the conventional substrates.关键词
硼掺杂金刚石电极/硬质合金/染料废水/化学需氧量/电压/电解质Key words
boron-doped diamond(BDD)electrode/cemented carbide/dye wastewater/chemical oxygen demand/voltage/electrolyte分类
化学化工引用本文复制引用
张韬,李英之,刘浩伍,邹西壮,薛喆..WC-Co/BDD电极在染料废水降解脱色中的应用[J].金刚石与磨料磨具工程,2025,45(6):769-778,10.基金项目
江苏省高等学校自然科学研究重大项目 （）
江苏省自然科学基金(BK20201142) （BK20201142）
江苏省青蓝工程学术带头人. （）
