高速道路沿いの土壌の鉛汚染 : カナダブリティッシュコロンビア州での事例

概要

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The contaminated soils of a highway interchange in BC, Canada were studied to determine the extent of lead-contamination and mobility of lead-contaminated roadside soils. Significant lead accumulations of up to 1628 mg/kg were found in the soils. The batch desorption tests on the samples using pH 5.6 and 4.0 solution indicate the leachate concentrations were below 2 mg/l, which meets the soil standard in the remediation standard of B.C Contaminated sites regulation. The adsorption capacities of the samples subjected to the batch adsorption test ranged from 2500 to 10000 mg of Pb/kg of soil. Given that leaded gasoline was the primary source of Pb contamination, it is unlikely that the sorption capacity of the soil for Pb will be reached in the near future. Soil organic matter percentage in the soil has a significant positive correlation with Pb retention.
社団法人地盤工学会の論文
2004-04-01