在稳定和固化之前和之后,金属污染土壤的健康状况的变化
Songhee Kim1, Jaeyoung Choi2, Seung-Woo Jeong1
1Department of Environmental Engineering, Kunsan National University, Gunsan, 54150, Republic of Korea.
Environmental pollution (Barking, Essex : 1987)
|June 2, 2023
概括
土壤稳定修复金属污染,但可能损害土壤健康. 大多数经过测试的稳定剂,特别是水泥和石灰,显著降低了土壤健康指标,使得经过处理的土壤在没有进一步管理的情况下不适合农业.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 整治技术 整治技术
背景情况:
- 土壤稳定是一种常见的方法,通过降低重金属的可溶性和流动性来修复金属污染的土壤.
- 各种稳定剂的应用可以改变土壤的特性,可能会影响土壤的整体健康.
研究的目的:
- 评估五种不同的稳定剂 (酸性矿山排水泥,煤矿排水泥,钢铁渣,石灰和水泥) 对金属污染土壤健康的影响.
- 用全面的土壤健康指数 (SHI) 评估土壤生产力,稳定性和生物多样性的变化.
主要方法:
- 在用五种稳定剂处理之前和之后,对金属污染的土壤进行了土壤健康评估.
- 测量了物理,化学和生物指标,以计算土壤功能SHI和总SHI.
- 对控制,受污染和稳定土壤样本进行了SHI值的比较分析.
主要成果:
- 最初受到重金属污染的土壤具有"正常"的SHI,但大多数稳定土壤在处理后显示出"糟糕"或"非常差"的SHI.
- 煤矿排水污泥和钢稳定剂导致处理土壤中最高的SHI,而水泥和石灰显示最低.
- 稳定剂的应用导致了土壤性质的显著变化,化离子可能进一步恶化土壤健康.
结论:
- 应用常见的土壤稳定剂可能会对土壤健康产生负面影响,使得处理过的土壤不适合农业使用.
- 水泥和石灰对土壤健康尤其有害,这表明需要仔细选择稳定剂.
- 在考虑农业使用稳定土壤之前,建议采取进一步的研究和管理策略,例如用干净的土壤覆盖或扩展监测.
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