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Abstract To obtain membrane water partition coefficient , Kpew, practical tests and kinetic experiments were conducted using passive sampling technique with three different thickness (76μm,56μm and 25μm) of low-density polyethylene (LDPE) membranes. For organic pollutants with logarithmic of octanol-water partition coefficient, logKow, greater than 2, the prediction model for Kpew has been established considering three key factors of time (t), thickness of film (d) and kinetics. The results shown that the relative error between Kpew from practical tests and prediction model is ±0.03, which proved the precise and reliable of this prediction model. The establishment of prediction model for Kpew could avoid the complicated processes of Kpew practical monitoring, hence the monitoring efficiency of organic pollutants would be improved significantly. Furthermore, the prediction model was applied to monitoring the organic pollutants in river Hun and Dongzhou, of which the results proved the precise and practicability of this prediction model in further. Besides, Kpew of benzene series are firstly proposed, which is considered as a breakthrough for the extension of passive technique with LDPE membranes.
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Received: 15 April 2015
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