亚铁活化及铁碳强化过硫酸钠氧化法修复模拟机油污染土壤  

Remediation of simulated engine oil contaminated soil by ferrous activated and iron-carbon enhanced sodium persulfate oxidation process

作　　者：高焕方[1] 何炉杰 王东[2] 郑佳[2] 龙海波 李亚玲 GAO Huanfang;HE Lujie;WANG Dong;ZHENG Jia;LONG Haibo;LI Yaling(College of Chemistry and Chemical Engineering,Chongqing University of Technology,Chongqing 400054,China;Chongqing Solid Waste Management Center,Chongqing 401147,China)

机构地区：[1]重庆理工大学化学化工学院,重庆400054 [2]重庆市固体废物管理中心,重庆401147

出　　处：《化工环保》2019年第1期55-59,共5页Environmental Protection of Chemical Industry

基　　金：重庆市社会民生科技创新专项(cstc2015shmszx20005);国家自然科学基金项目(21406023);重庆市教委基金项目(KJ1400901);重庆市基础科学与前沿技术研究专项(cstc2014jcyjA20008)

摘　　要：分别采用传统的Fe^(2+)活化过硫酸钠(Na_2S_2O_8)氧化和铁碳强化Na_2S_2O_8氧化两种方法修复模拟机油污染土壤。实验结果表明:对于传统Fe^(2+)-Na_2S_2O_8体系,在Na_2S_2O_8投加量为3.0%(w)、Fe SO4·7H2O投加量为0.6%(w)的优化条件下,土壤中总石油烃(TPH)的去除率仅为33.12%;而对于Fe^0-C-Na_2S_2O_8体系,在Na_2S_2O_8投加量为1.0%(w)、还原铁粉和活性炭的投加量均为0.1%(w)的优化条件下,土壤中TPH的去除率为42.99%;Fe^0-C-Na_2S_2O_8体系较Fe^(2+)-Na_2S_2O_8体系对土壤具有更好的修复效果,且Na_2S_2O_8的投加量减少了2/3。此外,Fe^0-C-Na_2S_2O_8体系较Fe^(2+)-Na_2S_2O_8体系对土壤pH的影响小,在实际应用中可适当提高铁粉的投加量来减小Na_2S_2O_8对土壤pH的影响。The simulated engine oil contaminated soil was treated by the traditional Fe2+ activated sodium persulfate ( Na2S2O8 ) oxidation process and iron-carbon enhanced Na2S2O8 oxidation process , respectively. The experimental results showed that : The removal rate of total petroleum hydrocarbon ( TPH ) in soil was only 33.12 % by the traditional Fe2+-Na 2 S 2 O 8 system under the optimum conditions of Na2S2O8 amount 3.0 %( w ) and FeSO4 · 7H2O amount 0.6 %( w ), while the removal rate of TPH in soil was 42.99 % by the Fe0-C-Na2S2O8 system under the optimum conditions of Na2S2O8 amount 1.0 %( w ) and both reducing iron powder and activated carbon 0.1 %( w );In addition , the Fe0-C-Na2S2O8 system had less impact on soil pH than the Fe2+-Na2S2O8 system. In practical application , the amount of iron powder could increase advisably to reduce the effect of Na2S2O8 on soil pH.

关 键 词：铁碳 过硫酸钠 亚铁 机油 土壤修复 

分 类 号：X53[环境科学与工程—环境工程]