摘要
本研究采用电化学测试和亚甲基蓝(MB)模拟废水处理两种手段评估了填充床电极反应器电催化氧化有机污染物的电极性能.循环伏安(CV)和电化学阻抗谱(EIS)拟合结果表明,填充床体系的电极面积是PbO2/Ti阳极面积的1.54倍(即床层拓展系数λ为0.54),PbO2/Ti阳极(γ)和活性炭复极化粒子电极(β)用于MB氧化的有效电流占比分别为0.63、0.34;采用废水处理结果拟合所得的λ和γ+β为0.54和0.99,所得数值与前者相符,两种方式得以相互验证.对体系能耗和电流效率的回归分析及F检验结果证明了所构建评估策略的准确性,可为填充床体系电极性能评估提供理论与方法支撑.
The electrode performances of a packed-bed electrode reactor(PBER)were evaluated through electrochemical measurements containing cyclic voltammetry(CV)and electrochemical impendence spectra(EIS)and methylene Blue(MB)wastewater treatment.The CV and EIS results implied that the electrode area of the PBER was 1.54 times than that of the PbO2/Ti anode,indicating the bed expansion coefficientλwas 0.54.Furthermore,the effective current ratio of PbO2/Ti anode(γ)and activated carbon particle electrode(β)during the MB oxidation were 0.63 and 0.34,respectively.As a comparison,the values of parametersλand the sum ofγandβobtained from MB oxidation experiments were 0.54 and 0.99,which were in accordance with those of the CV and EIS tests.The accuracy of the proposed methods was further validated by using the energy consumption and current efficiency in MB oxidation via the regressive analysis and F test.This work provided a theoretical and feasible tool for evaluating particle electrode performance of a packed-bed electrode system.
作者
张一弛
汤文静
陈倩文
卓孟宁
王立章
ZHANG Yi-chi;TANG Wen-jing;CHEN Qian-wen;ZHUO Meng-ning;WANG Li-zhang(School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2020年第8期3433-3440,共8页
China Environmental Science
基金
国家自然科学基金资助项目(51978654)
江苏省重点研发计划项目(BE2017640)。
关键词
电催化氧化
亚甲基蓝(MB)
填充床电极反应器
电极性能
评估策略
electrocatalytic oxidation
methylene blue(MB)
packed-bed electrode reactor
electrode performance
assessment strategy