LABORATORY MEASUREMENTS OF THE STRONTIUM DISTRIBUTION COEFFICIENT KDSR FOR SEDIMENTS FROM A SHALLOW SAND AQUIFER

被引：22

作者：

PATTERSON, RJ ^{[1
]}

SPOEL, T ^{[1
]}

机构：

[1] QUEENS UNIV, DEPT GEOL SCI, KINGSTON K7L 3N6, ONTARIO, CANADA

来源：

WATER RESOURCES RESEARCH | 1981年 / 17卷 / 03期

关键词：

D O I：

10.1029/WR017i003p00513

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A batch method was modified and improved for measuring Sr distribution coefficients KdSr for sediments from the shallow aquifer at Chalk River [Ontario, Canada]. An average measured KdSr value of 10 ml/g for whole aquifer sediments compared favorably with a field value of 7 ml/g; this was determined by using the retardation equation with an average KdSr of 10 ml/g based on analytical results for aquifer sediments and on coexisting groundwaters from a portion of the flow system that was contaminated with 90Sr. Measurements of KdSr for mineralogically pure segregates indicated that vermiculite, an alteration product of biotite, was the most effective adsorbent phase. KdSr results for grain size fractions suggested that the distribution of minerals with respect to grain size may strongly influence the KdSr of the whole sediment. Relationships between KdSr and exchangeable Ca on the sediments, and competing cation concentrations in the test solution indicated that electrostatic forces primarily controlled the sorption of Sr.

引用

页码：513 / 520

页数：8

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