中国东部铅酸电池厂周边土壤中铅生物可利用性的评估
Assessment of lead bioaccessibility in soils around lead battery plants in East China.
作者信息
Jin Zan-Fang, Zhang Zhuo-Jun, Zhang Hui, Liu Cong-Qiang, Li Fei-Li
机构信息
College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou, 310032, China.
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China.
出版信息
Chemosphere. 2015 Jan;119:1247-1254. doi: 10.1016/j.chemosphere.2014.09.100. Epub 2014 Nov 1.
Soil ingestion is an important human exposure pathway for lead (Pb). A modified physiologically based extraction test was applied to 70 soil samples from five battery plants in East China. The mean values for soil pH, soil organic matter, Fe and Mn concentrations ranged from 5.9% to 8.1, 0.37% to 2.2%, 2.78% to 3.75%, and 507-577 mg kg(-1), respectively, while Pb concentrations ranged widely in 14.3-2000 mg kg(-1). The isotopic ratios of 14 soils from one of the five battery plants formed a straight line in the plot of (208)Pb/(206)Pb vs. (207)Pb/(206)Pb, indicating Pb emissions from the lead battery plant as the dominant anthropogenic source within 200 m. Lead bioaccessibility in the soils ranged from 4.1% to 66.9% in the gastric phase and from 0.28% to 9.29% in the gastrointestinal phase. Multiple step regressions identified modes as BAgastric=-106.8+0.627[Pb]+19.1[Fe]+11.3[SOM], and BAgastrointestinal=-2.852+0.078[Pb].
土壤摄入是人类接触铅（Pb）的重要途径。对来自中国东部五个电池厂的70个土壤样本进行了改良的基于生理的提取试验。土壤pH值、土壤有机质、铁和锰浓度的平均值分别为5.9%至8.1、0.37%至2.2%、2.78%至3.75%和507 - 577 mg kg⁻¹，而铅浓度范围广泛，为14.3 - 2000 mg kg⁻¹。五个电池厂之一的14个土壤样本的同位素比值在（²⁰⁸）Pb/（²⁰⁶）Pb对（²⁰⁷）Pb/（²⁰⁶）Pb的图中形成一条直线，表明铅电池厂的铅排放是200米范围内主要的人为来源。土壤中铅的生物可及性在胃相阶段为4.1%至66.9%，在胃肠相阶段为0.28%至9.29%。多元逐步回归确定模型为BAgastric = - 106.8 + 0.627[Pb] + 19.1[Fe] + 11.3[SOM]，以及BAgastrointestinal = - 2.852 + 0.078[Pb]。
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