期刊
ENVIRONMENTAL POLLUTION
卷 158, 期 9, 页码 2964-2969出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2010.05.027
关键词
Dioxin; PCB; HOCs; Diffuse pollution; Catchment; Model
资金
- European Commission [ERAC-CT-2003-003219]
- Environment Agency of Sweden
- Environment Agency of England Wales
- Environment Agency of Austria
- Natural Environment Research Council [ceh010010] Funding Source: researchfish
The fate of hydrophobic organic compounds (HOCs) in soils and waters in a northern boreal catchment was explored through the development of a chemical fate model in a well-characterised catchment system dominated by two land types: forest and mire. Input was based solely on atmospheric deposition, dominated by accumulation in the winter snowpack. Release from soils was governed by the HOC concentration in soil, the soil organic carbon fraction and soil-water DOC content. The modelled export of selected HOCs in surface waters ranged between 11 and 250 ng day(-1) during the snow covered period, compared to 200 and 9600 ng/d during snow-melt; highlighting the importance of the snow pack as a source of these chemicals. The predicted levels of HOCs in surface water were in reasonable agreement to a limited set of measured values, although the model tended to over predict concentrations of HOCs for the forested sub-catchment, by over an order of magnitude in the case of hexachlorobenzene and PCB 180. This possibly reflects both the heterogeneity of the forest soils and the complicated and changing hydrology experienced between the different seasons. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据