环境工程学报2024，Vol.18Issue(1)：79-90,12.DOI:10.12030/j.cjee.202308077
改性Pd/GAC粒子电极吸附-电催化去除2,4,6-三氯苯酚
Adsorption and electrocatalytic degradation of 2,4,6-trichlorophenol by modified Pd/GAC particle electrode
摘要
Abstract
A modified Pd/granular activated carbon(GAC)particle electrode was prepared via sodium borohydride reduction using HNO3(6 mol·L-1)and high-temperature(450 ℃)modified GAC as the carrier.The performance,kinetics and dechlorination mechanism of the electrode on 2,4,6-trichlorophenol(2,4,6-TCP)removal were studied.The results showed that after modification,the specific surface area and pore volume of GAC increased by 1.5 times(560.791 m2·g-1)and 36.02％,respectively,and the maximum adsorption capacity to 2,4,6-TCP correspondingly increased to 199.2 mg·g-1.Under the optimized conditions,the modified particle electrode removed about 94.7％of 2,4,6-trichloropropanol(30 mg·L-1)at a rate constant of 0.014 min-1 in 4 hours.The catalytic activity of Pd was determined as 0.3(min·mmol)-1.The 2,4,6-TCP removal process was elucidated via the analysis of the variation of organic chlorine and inorganic Cl-.The electrocatalytic dechlorination mechanism of the modified particle electrodes was explored from the reduction pathways,direct and indirect reduction contributions.关键词
粒子电极/电催化脱氯/2,4,6-三氯苯酚/反应机理Key words
particle electrode/electrocatalytic dechlorination/2,4,6-trichlorophenol/reaction mechanism分类
资源环境引用本文复制引用
张金珂,梁玉涵,吴玉超,吴晨达,陈吕军,刘宏远,颉亚玮..改性Pd/GAC粒子电极吸附-电催化去除2,4,6-三氯苯酚[J].环境工程学报,2024,18(1):79-90,12.基金项目
国家自然科学基金面上资助项目(52070111 （）
52170093) （）
浙江省自然科学基金资助项目(LY22E080010) （LY22E080010）
