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来自无土壤水培园艺的废弃基质作为金属污染土壤的潜在修改

Joana Gonçalves¹, Ana Araújo¹, Tatiana Pedron¹

¹CIQUP/IMS, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal.

|August 18, 2024

概括

废弃的子和松树皮有效地固定污染土壤中的有毒金属,为环境修复和降低土壤毒性提供可持续和成本效益的解决方案.

科学领域:

环境科学环境科学
土壤科学土壤科学
整治技术的整治技术

背景情况:

由于金属的毒性,土壤中的金属污染对环境和公共卫生构成重大风险.
可持续和有效的修复策略对于降低土壤中的金属流动性和生物可用性至关重要.

研究的目的:

为了评估废弃的水培基质 (子和子/松树皮混合物) 在自然污染的土壤中固定各种金属和金属质的有效性.
评估这些基质与传统的土壤添加剂和纳米零价值铁 (nZVI) 对金属固定和土壤毒性的联合作用.

主要方法:

来自葡萄牙矿业地区的土壤样本被子和松树皮混合物 (质量比为5%) 处理.
处理与石灰岩和石膏 (2%质量比) 和纳米零价值铁 (nZVI) (1-3%质量比) 结合在一起.
金属 (Cd, Cr, Ni, Cu, Pb, Hg) 和金属化物 (Sb, As) 的固定百分比在30天的潜伏期后确定. 使用Aliivrio fischeri细菌评估了土壤的毒性.

主要成果:

废弃的基板显示出明显的金属和金属化物固定,在20%至91%之间.
与添加剂和nZVI的组合进一步提高了固定效率.
土壤毒性降低到对Aliivrio fischeri细菌的无毒水平,EC50值从大约6000 mg/L增加到超过10000 mg/L.

结论:

废弃的水培基板是土壤金属修复的可行,经济和环保的选择.
这些材料有效地降低了金属的生物可用性和相关的土壤毒性.
该研究强调了一种可持续的方法来管理使用农业废物产品的金属污染场所.

关键词:

子皮子的子石膏石膏是一种石膏.石灰石灰的使用方法松树皮松树皮松树皮整治整治整治整治顺序提取是指一个序列的提取.有毒性有毒性

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