Estimates of ambient background concentrations of trace metals in soils for risk assessment

被引：66
作者：
Zhao, F. J. [1 ]
McGrath, S. P.
Merrington, G.
机构：
[1] Agr & Environm Div, Rothamsted Res, Harpenden AL5 2JQ, Herts, England
[2] Environm Agcy, Chem Team, Wallingford OX10 8BD, Oxon, England
来源：
ENVIRONMENTAL POLLUTION | 2007年 / 148卷 / 01期
基金：
英国生物技术与生命科学研究理事会;
关键词：
ambient back round concentration; trace metals; soils; risk assessment;
D O I：
10.1016/j.envpol.2006.10.041
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Site-specific or soil type-specific ambient background concentrations (ABCs) of trace metals in soils are needed for risk assessment. We investigated three different methods for estimating ABCs in soils using a dataset of 5691 soil samples from England and Wales. The concentrations of Co, Cr and Ni were strongly associated with Al and Fe, and multiple regressions explained 62-85% of their variation, and Al and Fe can therefore be used to predict ABCs for these metals. Soil texture had a major influence on the concentrations of Cd, Co, Cr, Cu, Ni and Zn, and the medians were 3-5 fold higher in clayey than in sandy soils. This was used to predict texture- specific ABCs. Lead concentration was higher in acidic peaty soils than in other soils. A probability graph method was used to estimate ABC for Pb in a population of relatively uncontaminated soils. Potential applications of ABCs are discussed. (C) 2006 Elsevier Ltd. All rights reserved.
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收藏
页码：221 / 229
页数：9
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