高级氧化技术对化工污染场地土壤中DEHP的修复效果
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摘要
通过模拟修复试验,采用高级氧化技术对化工污染场地中的邻苯二甲酸二(2-乙基己基)酯(DEHP)的去除效果进行了研究。结果表明:对于较高初始浓度的DEHP污染土壤,在活化过硫酸钠试剂投加比为5%、水土比为1∶10的条件下对土壤中DEHP的去除效果最好,其去除率为99.6%,Fenton试剂对土壤中DEHP的最高去除率为64.8%;对于较低初始浓度的DEHP污染土壤,在Fenton试剂投加比为4%、水土比为1∶10的条件下对土壤中DEHP的去除效果最好,其去除率为93.9%;但随着氧化试剂投加比例的提升,土壤中DEHP的去除率有所降低。
This paper applies the advanced oxidation processes to studying the removal rate of diethylhexyl phthalate(DEHP)from contaminated soils at the industrial chemical plant site with the use of simulating device.The experimental results show that the removal rate of DEHP in the soil of higher initial concentration reaches the highest at 99.6% when the dosage of activated sodium persulfate is 5%and the water/soil ratio is 1∶10,while the highest removal rate is 64.8% when using the Fenton's reagents.The removal rate of DEHP in the soil of lower initial concentration reaches the highest at 93.9% when the dosage of Fenton's reagents is 4%and the water/soil ratio is 1∶10,and with the oxidant dosage increases,the removal rate of DEHP decreases.
This paper applies the advanced oxidation processes to studying the removal rate of diethylhexyl phthalate(DEHP)from contaminated soils at the industrial chemical plant site with the use of simulating device.The experimental results show that the removal rate of DEHP in the soil of higher initial concentration reaches the highest at 99.6% when the dosage of activated sodium persulfate is 5%and the water/soil ratio is 1∶10,while the highest removal rate is 64.8% when using the Fenton's reagents.The removal rate of DEHP in the soil of lower initial concentration reaches the highest at 93.9% when the dosage of Fenton's reagents is 4%and the water/soil ratio is 1∶10,and with the oxidant dosage increases,the removal rate of DEHP decreases.
引文
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[9]范荣桂,黄大青,方辽卫,等.高级氧化技术在纺织印染废水处理中的应用[J].安全与环境工程,2011,18(2):40-44.
[10]Liang C J,Bruell C J,Marley M C,et al.Thermally activated persulfate oxidation of trichloroethylene(TCE)and 1,1,1-trichloroethane(TCA)in aqueous systems and soil slurries[J].Soil and Sediment Contamination,2003,12(2):207-228
[11]Chen G,Hoag G E,Chedda P,et al.The mechanism and applicability of in situ oxidation of trichloroethylene with Fenton's reagent[J].Journal of Hazardous Materials,2001,87(1/2/3):171-186.
[2]Hao Y,Zheng G,Li Q,et al.Combined Toxic Effects of DBP and DEHP on Sperm in Male Mice[M]//Informatics and Management Science.London:Springer,2013:729-734.
[3]Zolfaghari M,Drogui P,Seyhi B,et al.Occurrence,fate and effects of Di(2-ethylhexyl)phthalate in wastewater treatment plants:A review[J].Environmental Pollution,2014,194(7):281-293.
[4]Parks L G,Ostby J S,Lambright C R,et al.The plasticizer diethylhexyl phthalate induces malformations by decreasing fetal testosterone synthesis during sexual differentiation in the male rat[J].Toxicological Sciences,2000,58(2):339-349.
[5]Yu O Y,Chung J W,Kwak S Y.Reduced migration from flexible poly(vinyl chloride)of a plasticizer containing beta-cyclodextrin derivative[J].Environmental Science&Technology,2008,42(19):7522-7527.
[6]Net S,Delmont A,SempéréR,et al.Reliable quantification of phthalates in environmental matrices(air,water,sludge,sediment and soil)[J].Science of the Total Environment,2015,515/516:162-180.
[7]Ranc B,Faure P,Croze V,et al.Selection of oxidant doses for in situ chemical oxidation of soils contaminated by polycyclic aromatic hydrocarbons(PAHs)[J].Journal of Hazardous Materials,2016,312:280-297.
[8]Glaze W H,Kang J,Chapin D H.The chemistry of water treatment processes involving ozone,hydrogen peroxide and ultraviolet radiation[J].Ozone Science&Engineering,1987,9(4):335-352.
[9]范荣桂,黄大青,方辽卫,等.高级氧化技术在纺织印染废水处理中的应用[J].安全与环境工程,2011,18(2):40-44.
[10]Liang C J,Bruell C J,Marley M C,et al.Thermally activated persulfate oxidation of trichloroethylene(TCE)and 1,1,1-trichloroethane(TCA)in aqueous systems and soil slurries[J].Soil and Sediment Contamination,2003,12(2):207-228
[11]Chen G,Hoag G E,Chedda P,et al.The mechanism and applicability of in situ oxidation of trichloroethylene with Fenton's reagent[J].Journal of Hazardous Materials,2001,87(1/2/3):171-186.