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[Enrichment and Release of Uranium During Weathering of Sedimentary Rocks in Wujiang Catchments]

[Enrichment and Release of Uranium During Weathering of Sedimentary Rocks in Wujiang Catchments]

Zhao-Liang Song, Cong-Qiang Liu, Gui-Lin Han, Zhong-Liang Wang, Cheng Yang, Zhan-Min Liu

Huan Jing Ke Xue. 2006 Nov;27(11):2273-8.

PMID: 17326439

Abstract:

Thirteen weathering profiles of typical rocks such as limestone, dolomitic limestone, dolomite, sillcalite, black shale and purple sandrock from Wujiang catchments were selected for discussing enrichment and release behavior of uranium (U) during rock weathering, and studying its impact on riverine U distribution in the catchments during weathering of these rocks with methods of correlation analysis and mass balance calculation. The purpose of this study is to improve our understanding on biogechemical cycling of U and set a basis for catchment protection against U pollution. The results show that the enrichment extent of U in soils from the Wujiang catchments is usually higher than that of upper continental crust (UCC), China soil (CS) and world soil (WS). The ability of enrichment and release of U is partly controlled by content of U in bedrocks, contents and adsorption ability of clay minerals and Fe-oxides/hydroxides in weathering profiles. Our study also reveals that release of U mainly from weathering of limestone and partly from weathering of dolomite and clastic rocks exerts an important control on riverine U distribution.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AS2121331	Uranium - WS			Price

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