Fe^(2+)活化过硫酸盐氧化降解水和泥浆中PAHs(芘)的研究  

Study on Degradation of PAHs(pyrene) in the Water and Mud by Persulfate Activated with Fe^(2+)

作　　者：陈辉[1,2] 肖杰[1,2] 万正茂[1,2] 张斌[1,2] 邹卉[1,2] 黄剑波[1,2] 王旻[1,2] 戴敏[1,2] 李晓璇[1,2] 

机构地区：[1]中新苏州工业园区清城环境发展有限公司,江苏苏州215021 [2]清华大学-苏州工业园区环境科学技术研发基地,江苏苏州215021

出　　处：《工业安全与环保》2017年第2期1-4,10,共5页Industrial Safety and Environmental Protection

基　　金：国家科技支撑计划项目(2014BAC02B02-05)

摘　　要：采用Fe(Ⅱ)活化过硫酸盐,产生强氧化性硫酸根自由基(·SO_4^-),探讨不同过硫酸盐、硫酸亚铁、柠檬酸溶液的初始浓度及pH值对水相中芘降解率的影响,从而得到水相中芘降解的最佳配比,同时据此配比进行土壤中芘的降解实验。结果表明,水相中柠檬酸浓度∶Fe^(2+)浓度∶过硫酸盐浓度∶芘的摩尔浓度比为20∶200∶400∶1时,过硫酸盐降解芘达到最佳效果。pH在5~10范围内,弱酸和中性条件比碱性条件更加利于Fe^(2+)活化过硫酸盐氧化多环芳烃。Fe（Ⅱ）activation persulfate is used to produce strong oxidizing sulfate radicals（·SO4-）,to explore the effects of different initial concentration of lead sulfate,ferrous sulfate,citric acid and pH value of water phase on pyrene degradation rate,so as to obtain the optimal formula of pyrene degradation.At the same time,the degradation experiments of pyrene in soil is conducted according to the ratio.The results show that when concentration of citric acid∶Fe2＋∶persulfate∶pyrene in molar ratio is 20∶200∶400∶1,persulfate degradation of pyrene achieves the best results.At a range of 510of pH,persulfate oxidate PAHs with Fe2＋ activation is more conductive in weak acidic and neutral condition than alkaline condition.

关 键 词：Fe2+ 活化过硫酸盐 氧化降解 PAHS 芘 

分 类 号：X703[环境科学与工程—环境工程]