碱性条件下日光／FeEDTA／H_2O_2降解2,4-二氯苯酚的研究  

DEGRADATION OF 2,4-DICHLOROPHENOL IN VIS/FeEDTA/H_2O_2 SYSTEM UNDER BASIC CONDITIONS

作　　者：刘英艳[1] 刘勇弟[1] 

机构地区：[1]华东理工大学环境工程系,上海200237

出　　处：《环境化学》2006年第2期137-140,共4页Environmental Chemistry

摘　　要：采用日光／FeEDTA／H2O2体系降解2,4-二氯苯酚废水,探讨了pH值,H2O2,FeEDTA以及2,4-二氯苯酚初始浓度对2,4-二氯苯酚去除率以及CODCr去除率的影响,发现该体系可在较宽的pH范围 (pH=2-11)降解2,4-二氯苯酚．碱性条件下(pH=9)对250mg·l-1的2,4-二氯苯酚废水,最佳处理条件为:[H2O2]=30mmol·l-1,[FeEDTA]=0．5mmol·l-1,此条件下,反应2h后,2,4-二氯苯酚的去除率高达99％,CODCr去除率达91％．另外,通过对传统Fenton,FeEDTA,草酸铁以及柠檬酸铁四种Fenton体系的对比研究,发现FeEDTA体系在碱性条件下处理2,4-二氯苯酚废水具有明显的优势．The treatment of refractory 2,4-dichlorophenol by VIS/FeEDTA/H2O2 was studied in this paper. The effects of pH, H2O2, FeEDTA and 2,4-dichlorophenol initial concentration on the removal efficiency of 2,4- dichlorophenol and CODCr was investigated. The results show that this system can degrade 2,4-dichlorophenol in a wide range of pH （2-11）. The optimum operation parameters under basic conditions （ pH = 9） are as follows： the suitable dose of H2O2and FeEDTA are 30mmol·l^-1 and 0. 5mmol·l^-1-Zrespectively. When 2,4- DCP＇s initial concentration is 250·l^-1 . Under these conditions, the removal efficiency of 2,4-dichlorophenol and CODCr is up to 99% and 91% respectively after reacting for 2h. The comparison of four different types of Fenton （ VIS/Fe^2＋/H2O2, VIS/FeEDTA/H2O2, VIS/ferrioxalate/H2O2 and VIS/ferricitrate/ H2O2 ） was studied under acid conditions and basic conditions respectively. The results show that the FeEDTA system is superior to others under basic conditions.

关 键 词：FENTON试剂 H2O2 FeEDTA 2 4-二氯苯酚 

分 类 号：X132[环境科学与工程—环境科学]