Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, 311300, China.
Jiande Agricultural Technology Extension Center, Hangzhou, 311600, China.
Sci Rep. 2020 Dec 17;10(1):22232. doi: 10.1038/s41598-020-79203-3.
Isotopic ratios were used to identify the source of Lead (Pb) contamination in rural soils from Southeast China. Enrichment of Pb in surface soils was detected from three sampling locations, with the Pb/Pb ratio indicating recent anthropogenic input. The Pb/Pb ratio from deeper soil profiles reflected the ratio from parent basalt. Mass fractions of anthropogenic-derived Pb for soil samples in the upper profiles was as high as 50%, implying that surface soils in the current study were impacted by anthropogenic activity. The Pb/Pb and PbPb ratios were similar to anthropogenic sources including the combustion of coal, which has been common practice in the region for 2500 years. Considering the relatively short history of petroleum use in this area and the rural location of soils, anthropogenic Pb source from coal burning was considered to be the main cause of lead pollution.
同位素比值被用来鉴定中国东南部农村土壤中铅（Pb）污染的来源。在三个采样点检测到表层土壤中 Pb 的富集，Pb/Pb 比值表明存在近期人为输入。较深土壤剖面中的 Pb/Pb 比值反映了原始玄武岩的比值。上层土壤样品中人为衍生 Pb 的质量分数高达 50%，这意味着本研究中的表层土壤受到了人为活动的影响。Pb/Pb 和 Pb/Pb 比值与包括煤燃烧在内的人为污染源相似，这在该地区已经有 2500 年的历史了。考虑到该地区石油使用的历史相对较短，以及土壤所处的农村位置，认为煤燃烧产生的人为 Pb 源是导致铅污染的主要原因。
