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通过在易受侵蚀的地区对废弃物进行植物管理,提高土壤生态安全
Wenliang Ju1, Ji Liu2, Wen-Chao Yang3
1National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China; School of Environment, Tsinghua University, Beijing 100084, China.
Journal of hazardous materials
|October 11, 2023
概括
矿山尾矿的植物管理改善了土壤质量和生态安全. 不同的再生植被策略,特别是灌木/草本混合物,通过提高土壤聚合物稳定性和营养含量来降低重金属风险.
科学领域:
- 土壤科学 土壤科学
- 环境科学 环境科学
- 生态恢复 生态恢复
背景情况:
- 复植是脆弱地区土壤质量的关键.
- 不同种类的尾矿植物管理对侵蚀易发地区的土壤质量和生态安全的影响仍未得到充分研究.
- 废弃的尾矿存在土壤退化和重金属污染的风险.
研究的目的:
- 研究不同植物管理策略对土壤水的稳定性,聚合营养和废弃尾矿中重金属污染风险的影响.
- 为了比较各种植被类型下的土壤质量和生态安全,与赤裸的土地相比.
- 了解土壤聚合物特性与重金属污染之间的关系.
主要方法:
- 在洛斯高原进行实地研究,比较不同植物管理 (灌木/草木混合森林,自然草原,植树森林) 和裸露土地下的废弃尾矿.
- 分析土壤聚合物稳定性,包括土壤有机碳 (SOC) 和与谷蛋白相关的土壤蛋白 (GRSP) 含量.
- 使用污染负载指数 (PLI) 和生态风险指数 (RI) 评估重金属污染.
主要成果:
- 植物管理显著改善了土壤聚合物的稳定性,在宏观聚合物中显示出更高的SOC,GRSP,芳香C和C.
- 与天然草原和植被森林相比,灌木/草原混合森林对重金属的PLI和RI较低.
- 在宏观聚合物中,重金属污染风险更高,并且与SOC和GRSP含量呈正相关.
结论:
- 土壤聚合物质量与废弃物中的重金属的行为和命运密切相关.
- 多样化的植物管理策略,特别是混合森林,有效地提高土壤质量并减轻重金属风险.
- 废弃尾矿的复植对于改善土壤质量和确保易受侵蚀的地区的生态安全至关重要.
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