氨基酸双子表面活性剂复配增溶PCE性能研究

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Abstract 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.

Key words： amino acid gemini surfactants solubilization perchloroethylene

Received: 04 August 2020

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X703

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	ZHAO Han
	DONG Jun
	XIA Tian
	LIANG Xue
	LI Wen-de

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ZHAO Han,DONG Jun,XIA Tian等. Performance of amino acid gemini surfactant co-mixed systems in solubilization of perchloroethylene[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(4): 1634-1641.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I4/1634

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