三维电极系统电化学氧化三唑酮  

Electro-chemical Oxidation of Aqueous Triadimefon by Three-dimensional Electrode System

作　　者：张明贤 魏琛[1] 盛贵尚[1] 田宇 ZHANG Ming-xian;WEI Chen;SHENG Gui-shang;TIAN Yu(College of Civil Engineering, Guizhou University, Guiyang 550025, China)

机构地区：[1]贵州大学土木工程学院,贵州贵阳550025

出　　处：《广州化学》2019年第2期32-38,共7页Guangzhou Chemistry

基　　金：土木工程一流学科(QYNYL[2017]0013);贵州省科技计划项目(黔科合SY字[2014]3045号;黔科合基础[2018]1125号);贵州大学引进人才项目(贵大人基合字[2015]18号)

摘　　要：以三唑酮(TDF)为目标污染物,以钛基钌铱电极和不锈钢板作阳极、阴极,颗粒活性炭(GAC)为粒子电极构建三维电极系统,通过搅拌实现粒子电极呈流化状态。研究电流密度、TDF初始浓度、GAC投加量、初始pH对三维电极系统的TDF去除效率的影响。研究结果表明:增大电流密度有助于提高TDF去除效率;TDF去除率随初始pH的增大呈现逐渐增大的趋势,碱性条件有助于TDF的去除;当GAC投加量为1～4 g/L时,增大GAC投加量有助于TDF的降解;增大TDF初始浓度会导致去除率的降低。当TDF初始浓度为200μg/L、电流密度为8m A/cm2、初始pH=11、GAC投加量为4 g/L时,电化学氧化10 min时TDF去除率达到99.95%。三维电极系统的传质效率高于二维电极系统,三维电极电化学氧化系统是一种适用于降解TDF的高级氧化技术。A three-dimensional electrode system was built to treat triadimefon(TDF), which was consisted of Ruthenium-Iridium coated Titanium as anode, stainless steel plate as cathode and granular activated carbon(GAC)as particle electrode. GAC was kept in fluidized state by stirring. Effects of applied current density, initial TDF concentration, GAC dosage, and initial pH on removal rate of TDF were investigated. Experimental results indicated that the increment of current density improved removal rate of TDF. The removal rate of TDF increased with the raise of initial pH, and alkaline condition favored the TDF degradation. When the GAC dosage varied from 1 g/L to 4 g/L, the removal rate of TDF was at high level when GAC dosage was higher. However, the increment of TDF concentration was lead to the drop of TDF removal rate. After the electrolysis of 10 minutes,removal rate of TDF was reached to 99.95% in the condition that initial TDF concentration of 200 μg/L, current density of 8 mA/cm^2, pH of 11, GAC dosage of 4 g/L. The mass transfer efficiency of three-dimensional electrode system is higher than two-dimensional electrode system. Three-dimensional electrode system is a kind of advanced oxidation technology to degrade aqueous TDF.

关 键 词：三维电极系统 电化学氧化 三唑酮 流化状态 

分 类 号：X703.1[环境科学与工程—环境工程]