Estimates of ambient background concentrations of trace metals in soils for risk assessment
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 A1 and Fe, and multiple regressions explained 62％-85％ of their variation. The concentrations of Al and Fe can be used to predict ABCs for these trace 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 soil 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.
ambient background concentration trace metals soils risk assessment
F. J. Zhao S. P. McGrath G. Merrington
Agriculture and Environment Division, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK Chemicals Team, Environment Agency, Evenlode House, Howbery Park, Wallingford, Oxon, OX10 8BD, UK
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
681-682
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）