摘要
通过三维(3D)电化学电催化降解1,4-二氧六环,以去除率为指标,对电压、电解质浓度、粒子投加量3个工艺参数进行优化,并推测该工艺降解1,4-二氧六环的主要反应机理。结果表明,工艺优化后的3D电化学体系提高1,4-二氧六环去除率,最高为84.87%,其去除1,4-二氧六环的最佳工艺条件为:电压10 V,粒子投加量20 g,电解质浓度0.015 mol·L^(-1);相较于二维(2D)电化学体系,3D电化学电催化的去除率提高了60.39%。此外,pH值对1,4-二氧六环去除效果的影响不明显。在3D电化学电催化过程中,羟基自由基(·OH)和过氧自由基(·O_(2)^(-))可能发挥重要作用,1,4-二氧六环通过开环、分解一系列连锁反应生成小分子酸,最终矿化成CO_(2)和H_(2)O。
Voltage,electrolyte concentration and particle dosage were optimized for degradation of 1,4-dioxane by three-dimensional(3D)electrochemical electrocatalysis,and its main reaction mechanism estimated.The results show that the optimized 3D electrochemical system can improve the removal rate of 1,4-dioxane up to 84.87%,with the optimal process conditions of voltage at 10 V,particle dosage at 20 g and electrolyte concentration at 0.015 mol·L^(-1).This removal rate measures an increase of 60.39%compared with 2D electrochemical system.The effect of pH value on the removal effect of 1,4-dioxane was not obvious.In the 3D electrochemical electrocatalysis process,Hydroxyl radicals(·OH)and peroxyradicals(·O_(2)^(-))may play important roles.1,4-dioxane generates small acid molecules through a chain reaction of ring opening and decomposition,and finally mineralizes into CO_(2) and H_(2)O.
作者
王瑞
代智能
张文琪
傅海莹
何小松
WANG Rui;DAI Zhineng;ZHANG Wenqi;FU Haiying;HE Xiaosong(School of Environmental Science and Engineering,Xiamen University of Technology,Xiamen 361024,China;Chinese Academy of Environmental Sciences,Beijing 100012,China)
出处
《厦门理工学院学报》
2024年第3期81-87,共7页
Journal of Xiamen University of Technology
关键词
1
4-二氧六环
三维电化学
电催化
工艺优化
反应机理
1,4-dioxane
three-dimensional electrochemistry
electrocatalysis
process optimization
reaction mechanism
