十二烷基苯磺酸钠淋洗修复二环己胺与十二烷基苯磺酸钠复合污染土壤的研究
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摘要
为探讨低浓度小剂量表面活性剂淋洗修复有机物与表面活性剂复合污染土壤的可行性,以十二烷基苯磺酸钠(SDBS)和二环己胺(DCHA)为研究对象进行吸附和洗脱等实验。结果表明,土壤对SDBS的吸附量随SDBS浓度升高而呈先线性增加后快速下降的趋势。无论是DCHA污染土壤还是SDBS-DCHA复合污染土壤,随着淋洗液SDBS浓度不断增大,DCHA的洗脱效率快速升高并最终趋于最大值。DCHA单独污染的土壤,SDBS浓度需要达到约2000 mg·L~(-1)才能达到最大洗脱效率,而对于DCHA-SDBS复合污染的土壤,浓度约600 mg·L~(-1)即可达到最佳修复效果。
To study the feasibility of using low concentration and small dose of surfactant to clean soil contaminated by mixed surfactant and organic pollutant, experiments of sorption and desorption/washing were conducted using SDBS and DCHA as representative surfactant and organic pollutant. The results showed that with increasing the concentration of SDBS, its sorption on soil initially increased and then rapidly decreased. The removal of DCHA increased and reached the maximum when SDBS was increased for both single DCHA contaminated or mixed SDBS-DCHA contaminated soil. For single DCHA contaminated soil, it required the SDBS concentration of about 2000 mg·L~(-1) for the maximal removal of DCHA from soil if DCHA was the only contaminant. In comparison, only 600 mg·L~(-1) of SDBC was needed for maximal DCHA removal in mixed SDBS-DCHA contaminated soil.
To study the feasibility of using low concentration and small dose of surfactant to clean soil contaminated by mixed surfactant and organic pollutant, experiments of sorption and desorption/washing were conducted using SDBS and DCHA as representative surfactant and organic pollutant. The results showed that with increasing the concentration of SDBS, its sorption on soil initially increased and then rapidly decreased. The removal of DCHA increased and reached the maximum when SDBS was increased for both single DCHA contaminated or mixed SDBS-DCHA contaminated soil. For single DCHA contaminated soil, it required the SDBS concentration of about 2000 mg·L~(-1) for the maximal removal of DCHA from soil if DCHA was the only contaminant. In comparison, only 600 mg·L~(-1) of SDBC was needed for maximal DCHA removal in mixed SDBS-DCHA contaminated soil.
引文
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[2]孙璐.阴—非离子混合表面活性剂强化黑麦草吸收PAHs[D].杭州:浙江大学,2008.
[3]Mousset E,Oturan M A,Van Hullebusch E D,et al.Soil washing/flushing treatments of organic pollutants enhanced by cyclodextrins and integrated treatments:State of the art[J].Critical Reviews in Environmental Science and Technology,2014,44(7):705-795.
[4]陈宝梁.表面活性剂在土壤有机污染修复中的作用及机理[D].杭州:浙江大学,2004.
[5]Shah A,Shahzad S,Munir A,et al.Micelles as soil and water decontamination agents[J].Chemical Reviews,2016,116(10):6042-6074.
[6]Edwards D A,Luthy R G,Liu Z B.Solubilization of polycyclic aromatic hydrocarbons in micellar nonionic surfactant solutions[J].Environmental Science&Technology,1991,25(1):127-133.
[7]Lamichhane S,Krishna K C B,Sarukkalige R.Surfactant-enhanced remediation of polycyclic aromatic hydrocarbons:A review[J].Journal of Environmental Management,2017,199:46-61.
[8]Reddy D H K,Vijayaraghavan K,Kim J A,et al.Valorisation of post-sorption materials:Opportunities,strategies,and challenges[J].Advances in Colloid and Interface Science,2017,242:35-58.
[9]李登宇,孙丽娜,吴昊.4种表面活性剂及其混合物对p,p'-DDT污染土壤洗脱效果[J].环境工程学报,2017,01:589-593.
[10]Trellu C,Mousset E,Pechaud Y,et al.Removal of hydrophobic organic pollutants from soil washing/flushing solutions:A critical review[J].Journal of Hazardous Materials,2016,306:149-174.
[11]Wei Y F,Liang X J,Lin W J,et al.Clay mineral dependent desorption of pyrene from soils by single and mixed anionic-nonionic surfactants[J].Chemical Engineering Journal,2015,264:807-814.
[12]Mao X H,Jiang R,Xiao W,et al.Use of surfactants for the remediation of contaminated soils:A review[J].Journal of Hazardous Materials,2015,285:419-435.
[13]程洪珍,葛蔚,史衍玺,等.表面活性剂淋滤对土壤中邻苯二甲酸酯纵向迁移的影响[J].环境工程学报,2014,08:3495-3504.
[14]shiguro M,Koopal L K.Surfactant adsorption to soil components and soils[J].Advances in Colloid and Interface Science,2016,231:59-102.
[15]杨坤.表面活性剂对有机污染物在土壤/沉积物上吸附行为的调控机制[D].杭州:浙江大学,2004.
[16]Krafft M P,Riess J G.Selected physicochemical aspects of poly-and perfluoroalkylated substances relevant to performance,environment and sustainability-Part one[J].Chemosphere,2015,129:4-19.