A QWASI model dependent on temperature is parameterized to describe the long-term fate of persistent organic pollutants(POPs)in the Liao River.The model parameters,namely fugacity capacity,degradation rate,and transfe...A QWASI model dependent on temperature is parameterized to describe the long-term fate of persistent organic pollutants(POPs)in the Liao River.The model parameters,namely fugacity capacity,degradation rate,and transfer coefficient,are profoundly affected by tem-perature.This model is used to simulate the fate of γ-hexachlorocyclohexane(c-HCH)in the lower reaches of the Liao River from 1998 to 2008.Modeling results show that c-HCH fugacity capacities in air,water,and sediment increase as temperature decreases,and the transfer and transformation rate coefficients increase as temperature increases.The varia-tions of transfer and transformation parameter D values depend on fugacity capacities,and transfer and transformation coefficients simultaneously.The performance of the model is evaluated by comparing the predicted and observed concentrations in the water and sediment of the Liao River.The predicted values agree well with the observed value in the order of magnitude,in most cases within the factor of 3.It is believed that the model is appropriate for simulating the long term fate of POPs in the Liao River.展开更多
基金This work was supported by the International Co-operation with Developing Countries of European Commission(INCO-DC Contract No.ERBIC 18CT970166).
文摘A QWASI model dependent on temperature is parameterized to describe the long-term fate of persistent organic pollutants(POPs)in the Liao River.The model parameters,namely fugacity capacity,degradation rate,and transfer coefficient,are profoundly affected by tem-perature.This model is used to simulate the fate of γ-hexachlorocyclohexane(c-HCH)in the lower reaches of the Liao River from 1998 to 2008.Modeling results show that c-HCH fugacity capacities in air,water,and sediment increase as temperature decreases,and the transfer and transformation rate coefficients increase as temperature increases.The varia-tions of transfer and transformation parameter D values depend on fugacity capacities,and transfer and transformation coefficients simultaneously.The performance of the model is evaluated by comparing the predicted and observed concentrations in the water and sediment of the Liao River.The predicted values agree well with the observed value in the order of magnitude,in most cases within the factor of 3.It is believed that the model is appropriate for simulating the long term fate of POPs in the Liao River.
