Pollution, fractionation and potential risks of V and Cd in soils from stone coal mines in Heshan region, Yiyang City

IF 2.8 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Environmental Earth Sciences Pub Date : 2024-11-07 DOI:10.1007/s12665-024-11927-1

Zulv Huang, Hui Fu, Guifang Lai, Yaye Mo, Shiyan Zeng, Xiaohong Zhou, Yi Huang, Shengdong Tao

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Abstract

This study investigates the mineral and soil characteristics of stone coal mine in southern China, focusing on metal pollution, chemical fractions, and associated risks. The research highlights significant enrichment of vanadium (V) and cadmium (Cd) in the stone coal. V is predominantly found in aluminosilicate minerals (83.7%), while Cd is exclusively associated with sulfide minerals (100%). In comparison to contaminated site soil, the form of V in paddy soil may change due to alternating dry and wet farming conditions, resulting in an increased proportion of reducible and oxidizing states. Additionally, Cd is released through sulfide weathering and migrates to deeper soils via acidic weathering solutions, posing high biological toxicity and mobility. Principal Component Analysis indicates that metal accumulation in the mining area is closely linked to natural geological factors, mining activities, and agricultural practices. The Geo-Accumulation Index (I_geo) and high hazard quotients (HQ) demonstrate severe cadmium pollution in the NB mine area (I_geo = 4.75) and potential non-carcinogenic risks from V for children (HQ > 1). These findings are crucial for ecological restoration efforts, promoting sustainable agricultural practices, and enhancing public health in areas impacted by mining activities.

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益阳市赫山区石煤矿区土壤中钒和镉的污染、分馏及潜在风险

本研究调查了中国南方石煤矿的矿物和土壤特性，重点是金属污染、化学成分和相关风险。研究结果表明，石煤中的钒（V）和镉（Cd）明显富集。钒主要存在于铝硅酸盐矿物中（83.7%），而镉则只与硫化物矿物有关（100%）。与受污染场地的土壤相比，稻田土壤中钒的形态可能会因干湿交替的耕作条件而发生变化，导致还原态和氧化态的比例增加。此外，镉通过硫化物风化释放，并通过酸性风化溶液迁移到深层土壤中，具有较高的生物毒性和迁移性。主成分分析表明，矿区的金属积累与自然地质因素、采矿活动和农业实践密切相关。地质累积指数（Igeo）和高危害商数（HQ）表明，NB 矿区镉污染严重（Igeo = 4.75），对儿童有潜在的非致癌风险（HQ > 1）。这些发现对于受采矿活动影响地区的生态恢复工作、促进可持续农业实践和提高公众健康水平至关重要。

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来源期刊

Environmental Earth Sciences 环境科学-地球科学综合

CiteScore

5.10

自引率

3.60%

发文量

494

审稿时长

8.3 months

期刊介绍： Environmental Earth Sciences is an international multidisciplinary journal concerned with all aspects of interaction between humans, natural resources, ecosystems, special climates or unique geographic zones, and the earth: Water and soil contamination caused by waste management and disposal practices Environmental problems associated with transportation by land, air, or water Geological processes that may impact biosystems or humans Man-made or naturally occurring geological or hydrological hazards Environmental problems associated with the recovery of materials from the earth Environmental problems caused by extraction of minerals, coal, and ores, as well as oil and gas, water and alternative energy sources Environmental impacts of exploration and recultivation – Environmental impacts of hazardous materials Management of environmental data and information in data banks and information systems Dissemination of knowledge on techniques, methods, approaches and experiences to improve and remediate the environment In pursuit of these topics, the geoscientific disciplines are invited to contribute their knowledge and experience. Major disciplines include: hydrogeology, hydrochemistry, geochemistry, geophysics, engineering geology, remediation science, natural resources management, environmental climatology and biota, environmental geography, soil science and geomicrobiology.