Speciation of heavy metals in floodplain and flood sediments: a reconnaissance survey of the Aire Valley, West Yorkshire, Great Britain

被引：74

作者：

Dawson, EJ ^{[1
]}

Macklin, MG ^{[1
]}

机构：

[1] Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, England

来源：

ENVIRONMENTAL GEOCHEMISTRY AND HEALTH | 1998年 / 20卷 / 02期

关键词：

floodplain; speciation; heavy metal; sediments;

D O I：

10.1023/A:1006541724394

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A five-step sequential extraction technique was used to determine the chemical association of heavy metals (Pb, Zn, Cu and Cd), with major sedimentary phases (exchangeable, surface oxide and carbonate, Fe and Mn oxides, organic and residual metal ions), in samples from floodplain and recent flood sediments of the River Aire, West Yorkshire. Analysis indicates that metals Pb and Zn are primarily associated with the Fe and Mn oxides, Cu with the organic fraction and Cd with exchangeable and surface oxide and carbonate metal ions. Knowledge of the chemical speciation of heavy metals in river sediment, despite the procedure's inherent limitations, facilitates an understanding of their bioavailability, storage and remobilisation in floodplain and river channel environments.

引用

页码：67 / 76

页数：10