Preliminary study on temporal trend lag of organic pollutant concentrations in environmental media and its influencing factors

doi:10.3969/j.issn.1000-5641.2018.03.022

Abstract

Abstract: 131 organic chemicals were used, and a level IV EQuilibrium Criterion (EQC) multimedia model was built. The model was applied to simulate temporal trends of organic chemical concentrations in environmental media using four emission scenarios. Results showed that temporal trends of organic chemical concentrations lagged behind their emissions in most cases, and organic chemicals with higher lgK_OW and persistence showed the most obvious lag effect. Correlation analysis showed that persistence was the principal factor influencing the lag time in water, air, and soil; and lgK_OW and persistence were the principal factors in sediment. Prediction formulas for lag time were obtained by regression analysis. If the sediment was a sink of organic chemicals, the lag effect would be distinct.The study can be employed to illustrate the theoretical transfer and transformation of organic chemicals in an environmental system.

Key words: organic pollutant, lag, temporal trend, environmental media, environmental model

CLC Number:

X592

MO Jun-chao, HE Yuan, LIU Gang. Preliminary study on temporal trend lag of organic pollutant concentrations in environmental media and its influencing factors[J]. Journal of East China Normal University(Natural Sc, 2018, 2018(3): 212-221.

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