Interfacial Mass Transfer in TrichloroethyleneSurfactants Water Systems: Implications for Remediation Strategies by unknow
Author:unknow
Format: pdf
Tags: The fate of dense non-aqueous phase liquids (DNAPLs) in the environment and the consequential remediation problems have been intensively studied over the last 50 years. However, a scarce literature is present about the mass transfer at the DNAPL/water interface. In this paper, we present a fast method for the evaluation of the mass transfer performance of a surfactant that can easily be employed to support an effective choice for the so-called enhanced remediation strategies. We developed a lab-scale experimental system modelled by means of simple ordinary differential equations to calculate the mass transfer coefficient (K) of trichloroethylene, chosen as representative DNAPL, in the presence and in the absence of two ethoxylated alcohols belonging to the general class of Synperonic surfactants. Our findings revealed that it exists an optimal surfactant concentration range, where K increases up to 40% with respect to pure water., trichloroethylene; kinetic model; mass transfer coefficient; green surfactant; surfactant co-solvent flushing; poly-oxyethylene alcohol
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