摘要
利用氨基酸双子表面活性剂N,N′-双月桂酰基乙二胺二丙酸钠(DLMC)及其复配体系来提高四氯乙烯(PCE)在地下水中的溶解性,强化去除效果.测定了DLMC的初级生物降解性并将其与短链醇(异丙醇IPA,乙醇)和传统表面活性剂十二烷基硫酸钠(SDS),辛基苯基聚氧乙烯醚(TX-100)和聚氧乙烯脱水山梨醇单油酸酯(Tween80)复配.结果表明,DLMC的生物降解度超过99%,具备良好的生物降解性;筛选出DLMC-IPA(1:4)和DLMC-Tween80(1:1)两个PCE污染柱冲洗剂配方,40g/L作用浓度下其增溶浓度分别为18329,16906mg/L;DLMC-Tween80(1:1)对PCE污染柱的冲洗效果最好,冲洗效率为9.87(g PCE/L冲洗液),较DLMC单体系提升16%.
The amino acid gemini surfactant N,N’-dilauroyl ethylenediamine sodium dipropionate(DLMC)and its co-mixed system were used to improve the solubility of perchloroethylene(PCE)in groundwater and to enhance the removal effect.The primary biodegradability of DLMC was determined and it was co-mixed with short-chain alcohols(isopropyl alcohol,ethanol)and traditional surfactants including sodium dodecyl sulfate(SDS),octylphenyl polyoxyethylene ether(TX-100)and polyoxyethylene dehydrated sorbitan monooleate(Tween80).The results showed that the biodegradability of DLMC was over 99%,possessing good biodegradability.Two formulations of DLMC-IPA(1:4)and DLMC-Tween80(1:1)were selected for PCE-contaminated column flushing and their solubilizing concentrations were 18329 and 16906mg/L at 40g/L,respectively.DLMC-Tween80(1:1)showed the best flushing effect on PCE-contaminated columns with a flushing efficiency of 9.87g PCE per liter of flushing solution,which was 16%higher than that of single DLMC system.
作者
赵寒
董军
夏添
梁雪
李文德
ZHAO Han;DONG Jun;XIA Tian;LIANG Xue;LI Wen-de(College of New Energy Resource and Environment,Jilin University,Changchun 130021,China;Key Laboratory of Groundwater Resources and Environment(Jilin University),Ministry of Education,Changchun 130021,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2021年第4期1634-1641,共8页
China Environmental Science
基金
国家重点研发计划(2018YFC1802503)
国家自然科学基金资助项目(42077167)。
关键词
氨基酸
双子表面活性剂
增溶
四氯乙烯
amino acid
gemini surfactants
solubilization
perchloroethylene
