Sustainable Use, Management and Reclamation of Soil and Water Research Group, Universidad Politécnica de Cartagena, Paseo Alfonso XIII 48, 30203, Cartagena, Spain.
Sustainable Use, Management and Reclamation of Soil and Water Research Group, Universidad Politécnica de Cartagena, Paseo Alfonso XIII 48, 30203, Cartagena, Spain.
J Environ Manage. 2018 Apr 15;212:292-300. doi: 10.1016/j.jenvman.2018.02.010. Epub 2018 Feb 22.
The objectives of this study were to determine the metals and arsenic transfer from mining ponds to agricultural and forest soils, and identify the dynamic of metal(loid)s in the soil-plant system for a native plant species (Ballota hirsuta) in two old mining districts: La Unión and Mazarrón (Spain). Soils and plants from mining ponds and natural and agricultural areas were collected and analyzed for soil properties, and chemical partitioning of Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn and As. Results showed that mine, forest and agricultural soils were contaminated by As, Cd, Cu, Pb, and Zn. Chemical partitioning revealed higher mobility of metals in mining ponds than natural and agricultural soils except for Fe and As which were mostly bound to soil matrix due to the mineralogical compositions of soils. The accumulation of metal(loid)s in B. hirsuta in La Unión decreased as Fe > As > Cr > Ni > Cu > Zn > Cd > Mn > Co > Pb while in Mazarrón was As > Fe > Cr > Pb > Cu > Ni > Co > Mn > Zn > Cd, showing that B. hirsuta has high ability to bio-accumulate Fe, As, Cr, Cu and Ni; and Pb (in Mazarrón), transferring a significant concentration of theses metal(loid)s, except Pb, to edible parts without exceeding the toxicity limits for animals. Therefore, B. hirsuta could be useful as phytoextractor species for Cr, Cu, As and Ni, while it can be used as phytostabilizer species for Zn, Co, Pb and Cd.
本研究的目的是确定从采矿池塘向农业和森林土壤转移的金属和砷，并确定两种旧矿区（拉联合和马扎隆）中本地植物物种（绒毛龙舌兰）土壤-植物系统中金属（类）的动态。从采矿池塘、自然和农业区采集土壤和植物，分析土壤特性以及 Cd、Co、Cr、Cu、Fe、Mn、Ni、Pb、Zn 和 As 的化学分配。结果表明，矿山、森林和农业土壤受到 As、Cd、Cu、Pb 和 Zn 的污染。化学分配表明，除 Fe 和 As 外，采矿池塘中的金属比自然和农业土壤更具迁移性，这是由于土壤的矿物组成导致金属主要与土壤基质结合。在拉联合，B. hirsuta 中金属（类）的积累顺序为 Fe > As > Cr > Ni > Cu > Zn > Cd > Mn > Co > Pb，而在马扎隆则为 As > Fe > Cr > Pb > Cu > Ni > Co > Mn > Zn > Cd，表明 B. hirsuta 具有高生物积累 Fe、As、Cr、Cu 和 Ni 的能力；以及 Pb（在马扎隆），除 Pb 外，将这些金属（类）的显著浓度转移到可食用部分而不超过动物的毒性限值。因此，B. hirsuta 可以作为 Cr、Cu、As 和 Ni 的植物提取剂，而可以作为 Zn、Co、Pb 和 Cd 的植物稳定剂。
