Biocrusts significantly affect the bioavailability and ecological risk of heavy metals in gold mine tailings
文献类型：期刊论文
| 作者 | Fan, Jin2; Bu, Chongfeng2,4; Qi, Yangzhou1; Zhou, Wenjuan2; Wang, Chun2; Wei, Yingxin2; Siddique, Kadambot H. M.3 |
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2023-08-17 |
| 页码 | 15 |
| ISSN号 | 0032-079X |
| 关键词 | Biocrust Heavy metal speciation Bioavailability Ecological risk Gold mine tailings |
| DOI | 10.1007/s11104-023-06218-w |
| 通讯作者 | Bu, Chongfeng(buchongfeng@163.com) |
| 英文摘要 | Aims Biocrusts are important living covers in ecologically fragile regions that intercept metals entering the soil and indicate heavy metal contamination. This study explored the potential of biocrusts as a novel approach for remediating heavy metal pollution in mining areas. We also investigated the capacity of biocrusts to enrich or degrade heavy metals in gold mine tailings and analyzed the migration, transformation mechanisms, and potential toxic effects of heavy metals in the underlying biocrusts. Methods We used the BCR sequential extraction procedure to analyze the speciation of heavy metals in the underlying biocrust layer (moss crusts, mixed crusts (moss + algal), and algal crusts). The risk assessment code (RAC) and potential ecological risk index (Er) were used to evaluate the impact of biocrusts on the ecological risk assessment of heavy metals in soil. Results The results showed that (1) well-developed biocrusts had a strong ability to enrich heavy metals, with these metals accumulating at the surface; (2) biocrust growth facilitated the conversion of heavy metals from an inert state to an active form in the underlying layer, enhancing their bioavailability; (3) Spearman's correlation and redundancy analysis (RDA) revealed the total amount of heavy metals as the primary factor driving the translocation of soil heavy metals, with soil pH, cationic exchange capacity (CEC) and organic matter content (SOM) exerting varying influences; (4) the comprehensive potential ecological risk index indicated that heavy metals in gold tailings at the strong risk levels, mainly due to arsenic exceeded the standard (similar to 7 x background values). However, biocrusts reduced the Er of heavy metals in the underlying layer. The RAC results indicated low mobility and bioavailability of heavy metals in the underlying layer, associated with low ecological risk. Conclusions As the 'skin' of soil, biocrusts could protect soil from heavy metal contamination. Despite enhancing heavy metal bioavailability, their enrichment effect was much greater than their activation effect. As a result, biocrusts hold great promise for remediating heavy metal pollution in degraded ecosystems. Further exploration of the influencing mechanism of biocrusts on heavy metals will help validate their use in mine restoration processes. |
| WOS关键词 | BIOLOGICAL SOIL CRUSTS ; CHEMICAL-FRACTIONS ; CONTAMINATED SOILS ; SPECIATION ; REMEDIATION ; SEDIMENTS ; SURFACE ; DESERT ; PLANT ; POLLUTION |
| 资助项目 | National Scientific Foundation of China[41971131] ; National Key Research and Development Program of China[2016YFE0203400] ; National Key Research and Development Program of China[2017YFC0504703] ; Qinchuangyuan West (Xianyang) Science and Technology Venture Bay[2022?-?747] |
| WOS研究方向 | Agriculture ; Plant Sciences |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:001048620500001 |
| 资助机构 | National Scientific Foundation of China ; National Key Research and Development Program of China ; Qinchuangyuan West (Xianyang) Science and Technology Venture Bay |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/196200]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Bu, Chongfeng |
| 作者单位 | 1.Zhouzhi Cty Heihe Reservoir Resettlement Leading G, Zhouzhi 710400, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Univ Western Australia, UWA Inst Agr, Sch Agr & Environm, Perth, WA, Australia 4.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Jin,Bu, Chongfeng,Qi, Yangzhou,et al. Biocrusts significantly affect the bioavailability and ecological risk of heavy metals in gold mine tailings[J]. PLANT AND SOIL,2023:15. |
| APA | Fan, Jin.,Bu, Chongfeng.,Qi, Yangzhou.,Zhou, Wenjuan.,Wang, Chun.,...&Siddique, Kadambot H. M..(2023).Biocrusts significantly affect the bioavailability and ecological risk of heavy metals in gold mine tailings.PLANT AND SOIL,15. |
| MLA | Fan, Jin,et al."Biocrusts significantly affect the bioavailability and ecological risk of heavy metals in gold mine tailings".PLANT AND SOIL (2023):15. |
入库方式： OAI收割
来源：地理科学与资源研究所
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