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Microemulsion of Mixed Chlorinated Solvents Using Food Grade (Edible) Surfactants

机译：使用食品级（食用）表面活性剂的混合氯化溶剂的微乳液

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Ground water contamination frequently consists of mixed chlorinated solvents [e.g., tetrachloroethylene (PCE), trichloroethylene (TCE), and trans-1,2-dichloroethylene (DCE)]. In this research, mixtures of the food grade (edible) surfactants bis(2-ethylhexyl) sodium sulfosuccinate (AOT) and sodium mono- and dimethylnaphthalene sulfonate (SMDNS) were used in the formation of middle-phase micro-emulsions for mixed chlorinated solvents. Micro-emulsions of binary (e.g., PCE/TCE, PCE/DCE, DCE/TCE) and ternary (PCE/TCE/DCE) chlorinated solvent systems were evaluated. Several empirical correlations were used for describing and/or predicting the phase behavior of the resulting middle-phase microemulsions (e.g., the ideal mixing rule orthe nonideal regular mixing theory). The ideal mixing rule provided a good approximation for binary and ternary systems, but experimental deviations from the predictions were significant enough to affect the optimal surfactant system. Nonideal regular mixing theory demonstrated much better predictive capabilities than ideal mixing for the binary and ternary systems. The recognition of nonideal mixing behavior and the resulting predictive correlations will be valuable in the design of groundwater remediation scenarios when surfactants are used for remediation of mixed chlorinated solvents.
机译：地下水污染通常由混合的氯化溶剂[例如，四氯乙烯（PCE），三氯乙烯（TCE）和反式1,2-二氯乙烯（DCE）]组成。在这项研究中，食品级（食用）表面活性剂双（2-乙基己基）磺基琥珀酸钠（AOT）与单和二甲基萘磺酸钠（SMDNS）的混合物用于形成混合氯化溶剂的中间相微乳液。评价了二元（例如PCE / TCE，PCE / DCE，DCE / TCE）和三元（PCE / TCE / DCE）氯化溶剂体系的微乳液。几种经验相关性用于描述和/或预测所得中间相微乳液的相行为（例如，理想的混合规则或非理想的规则混合理论）。理想的混合规则为二元和三元系统提供了很好的近似值，但是与预测值的实验偏差足以影响最佳的表面活性剂系统。非理想的规则混合理论显示出比二元和三元系统的理想混合更好的预测能力。当使用表面活性剂修复混合氯化溶剂时，非理想混合行为的识别以及由此产生的预测相关性在地下水修复方案的设计中将是有价值的。

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