Abstract：
Pyrite is a typical sulfide mineral which contains various potentially toxic metal(loid)s (PTMs). The pyrite smelting and subsequent industrial utilization activities usually release numerous amounts of PTMs into nearby ecosystem, which may be enriched in the nearby farmland soils and crops, leading to hidden but irreversible harm to human health via the food chain. Herein, the distribution pattern, source apportionment, and potential health risks of Pb, Zn, Cu, Cd and multiple seldom monitored PTMs (Ag, Bi, Sb, Sr, Th, U, W, and V) in the paddy soils and different organs of the rice plants from ten various sites in a typical industrial zone were investigated, where pyrite ores were used for the production of sulfuric acid and subsequent cement over several decades. The results showed that the contents of Cd, Pb and Zn in studied paddy soils generally exceeded the maximum permissible level (MPL) in China, and the contents of Sb and V were approaching the MPL. Moreover, the rice is easier to bioaccumulate Cd, Cu, and Zn than the other studied elements. The hazard quotient (HQ) calculations indicate that the rice containing such multiple elements may cause a high potential non-carcinogenic and carcinogenic health risk for residents, particularly for the senior group. The Pb isotope tracing method combined with PCA (principal component analysis) further uncovered that the pyrite industrial utilization contributed 18.58-55.41 % to the highly enriched PTMs in paddy soils. All these findings indicate that the paddy soil system has been contaminated by the pyrite industrial activities and certain distances or areas should be rigidly forbidden from rice cultivation in the proximity of the pyrite smelting and related industrial sites.
摘要：
黄铁矿是一种典型的硫化物矿物，含有各种潜在的有毒金属（类）（PTM）。黄铁矿冶炼和随后的工业利用活动通常会将大量的PTM释放到附近的生态系统中。它们可能富含附近农田的土壤和作物，通过食物链对人类健康造成隐藏但不可逆转的危害。在这里，分布模式，来源分配，铅的潜在健康风险，Zn,Cu,Cd和多个很少监测的PTM(Ag，Bi,Sb,Sr,Th,U,W,和V）在典型工业区十个不同地点的稻田土壤和水稻植物的不同器官中进行了调查，在那里，黄铁矿用于生产硫酸和随后的水泥几十年。结果表明,研究的稻田土壤中的Pb和Zn普遍超过了中国的最大允许水平（MPL），Sb和V的含量接近MPL。此外，水稻更容易生物积累Cd，Cu,和锌比其他研究的元素。危险商（HQ）计算表明，含有这种多种元素的大米可能对居民造成很高的潜在非致癌和致癌健康风险，特别是对于高级集团。Pb同位素示踪法结合PCA（主成分分析）进一步发现，黄铁矿的工业利用对水稻土中高富集PTM的贡献为18.58-55.41％。所有这些发现都表明，稻田土壤系统已受到黄铁矿工业活动的污染，应严格禁止在黄铁矿冶炼和相关工业场所附近种植水稻。
