石油烃污染土壤活性碳增强微波热修复及菌剂深度降解试验研究  

Study on activated carbon enhanced microwave thermal remediation and deep degradation of microbial agent in petroleum contaminated soil

作　　者：陈维墉 胡林潮 朱雷鸣 贺晓江 陈婕 张文艺 CHEN Weiyong;HU Linchao;ZHU Leiming;HE Xiaojiang;CHEN Jie;ZHANG Wenyi(School of Environmental and Safety Engineering,Changzhou University,Changzhou 213164,Jiangsu,P.R.China;Sinopec Guangzhou Engineering Co.,Ltd,Guangzhou 510620,P.R.China)

机构地区：[1]常州大学环境与安全工程学院,江苏常州213164 [2]中石化广州工程有限公司,广州510000

出　　处：《土木与环境工程学报（中英文）》2021年第4期195-201,共7页Journal of Civil and Environmental Engineering

基　　金：中国石油化工股份有限公司科技计划(319005-7);江苏省研究生科研与实践创新计划(SJCX19_0644)。

摘　　要：利用活性碳增强微波热效应对某石油化工厂区石油烃污染土壤进行修复研究,在微波处理最佳条件下,考察场地石油烃污染土壤的处理效果,通过三维荧光(3D-EEM)和气相色谱(GC)分析了石油烃污染物的组分和去除特性,并采用菌剂强化法对修复后的土壤进行深度生物降解试验。结果表明:活性碳增强微波热修复技术对石油烃污染土壤具有较好的去除效果,在微波功率700 W、辐照15 min、土壤含水率10%、添加5%活性碳的试验条件下,可将土壤中的石油烃含量由5700 mg/kg降至2800 mg/kg,去除率达50.9%;GC分析表明:土壤中污染组分主要为TPH(C 6—C 9)、TPH(C 15—C 28)和TPH(C 29—C 36),经微波热修复后,土壤中TPH(C 15—C 28)去除率较高,达到70.4%;3D-EEM解析表明:微波热消解对土壤中三环芳烃及其同系物去除效果较好;对微波热修复后的土壤进行工程菌剂深度生物降解14 d后,污染土壤中石油烃含量降至716.8 mg/kg,去除率提升至74.4%,达到《土壤环境质量建设用地土壤污染风险管控标准(试行)》(GB 36600—2018)中的第一类用地筛选值。The remediation of petroleum hydrocarbon contaminated soil was studied by using activated carbon enhanced microwave thermal effect technology in a petrochemical plant.Under the best condition of microwave treatment,the treatment effect of petroleum hydrocarbon contaminated soil was investigated in the site.The components and removal characteristics of petroleum pollutants were analyzed by 3D-EEM(three-dimensional fluorescence)and GC(gas chromatography),and the deep biodegradation test of the repaired soil was carried out by the bacterial strengthening method.The results showed that the activated carbon enhanced microwave thermal remediation technology had a better removal effect on petroleum hydrocarbon contaminated soil.Under the experimental conditions of microwave power of 700 W,irradiation for 15min,soil moisture content of 10%and addition of 5%activated carbon,the content of petroleum hydrocarbon in the soil could be reduced from 5700 mg/kg to 2800 mg/kg,and the removal rate reached 50.9%;GC analysis showed that the main pollutants in the soil were TPH(C 6—C 9),TPH(C 15—C 28)and TPH(C 29—C 36),and after the microwave thermal remediation,the removal rate of TPH(C 15—C 28)in the soil was higher,reaching 70.4%;Based on 3D-EEM analysis,the results showed that the microwave thermal remediation had a better effect on removing tricyclic aromatic compounds and their homologues in the soil.The deep biodegradation of the engineered bacterial agent was carried out on the soil after microwave thermal remediation,the results showed that after 14 days of degradation,the content of petroleum hydrocarbon in the contaminated soil decreased to 716.8 mg/kg,and the removal rate increased to 74.4%,which reached the first class of land selection value in standard for Soil Environmental Quality Standards for Soil Pollution Risk Control of Construction Land(Trial)(GB 36600—2018).

关 键 词：石油烃 污染土壤 微波热修复 石油降解菌 

分 类 号：X53[环境科学与工程—环境工程]