2种氨基多羧酸改良光-Fenton体系降解2,4-二氯苯酚  

Two Kinds of Aminopolycarboxylic Acids Modified Photo-Fenton System for 2,4-Dichlorophenol Degradation

作　　者：黄影 徐梓淞 罗伟 黄闻宇 王双飞 杨崎峰[2] HUANG Ying;XU Zisong;LUO Wei;HUANG Wenyu;WANG Shuangfei;YANG Qifeng(College of Resources,Environment and Materials,Guangxi University,530004;Guangxi Bossco Environmental Protection Technology Co.,Ltd,530007;College of Light Industry and Food Engineering,Guangxi University,530004:Nanning,China)

机构地区：[1]广西大学资源环境与材料学院,530004 [2]广西博世科环保科技有限公司,530007 [3]广西大学轻工与食品工程学院,广西南宁530004

出　　处：《水处理技术》2021年第12期56-60,共5页Technology of Water Treatment

基　　金：国家自然基金资助项目(21367003);广西科技研究项目(AA17202032);广西清洁化制浆造纸与污染控制重点实验室开放基金(KF201724)。

摘　　要：研究中性条件下,2种氨基多羧酸(APCAs),乙二胺-N,N’-二琥珀酸(EDDS)和氨三乙酸(NTA)改良光-Fenton体系对2,4-二氯苯酚(2,4-DCP)的降解。考察Fe(Ⅲ)和EDDS/NTA的络合比、Fe(Ⅲ)-EDDS/NTA配合物浓度、H;O;浓度及初始pH对2,4-DCP降解的影响。结果表明,中性条件下,Fe(Ⅲ)和EDDS/NTA以摩尔比1:1络合,Fe(Ⅲ)-EDDS/NTA配合物浓度为0.1 mmol/L,H;O;浓度为1.0 mmol/L时,2,4-DCP几乎完全降解。并且,2,4-DCP在中性和碱性条件下仍有显著的降解效果。HO;是降解的主要活性物种。EDDS和NTA能够提高光-Fenton体系的降解效率,一定程度上拓宽pH的适用范围。Two kinds of aminopolycarboxylic acid(APCAs),such as ethylenediamine-N,N'-disuccinic acid(EDDS),and nitrilotriacetic acid(NTA)modified photo-Fenton system was studied to degrade 2,4-dichlorophenol(2,4-DCP)under the condition of neutral.The effects of the complex ratio of Fe(III)and EDDS/NTA,Fe(III)-EDDS/NTA complexes concentration,H_(2) O_(2) concentration,and the initial pH on 2,4-DCP degradation were investigated.The results showed that the 2,4-DCP was almost completed degradation in the two systems of EDDS and NTA under the molar ratio of Fe(III)/EDDS/NTA was 1:1,Fe(III)-EDDS/NTA complexes concentration was 0.1 mmol/L,and concentration of H_(2)O_(2) was 1.0 mmol/L at the neutral conditions.In addition,the 2,4-DCP had a significant degradation effect under neutral and alkaline conditions,and the HO•radicals are the main active species after degradation.The EDDS and NTA can improve the degradation efficiency of the photo-Fenton system,and broaden the application range of pH to a certain extent.

关 键 词：氨基多羧酸 Fe(Ⅲ)-EDDS/NTA 光-Fenton 2 4-二氯苯酚 降解 

分 类 号：X703.1[环境科学与工程—环境工程]