Fe-CGS有效地抑制了土壤中和的动态迁移和转化
Hongliang Yin1,2, Changzhi Zhou2, Junhuan Wang2
1School of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China.
Toxics
|April 26, 2024
概括
铁改煤气化废渣 (Fe-CGS) 在极端降雨的情况下有效稳定污染土壤中的 (Cd) 和 (As). 铁-CGS将重金属转化为稳定的形式,降低其生物可用性和迁移.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 地质化学 地质化学
背景情况:
- 铁改性煤气化废渣 (Fe-CGS) 在水生环境中的重金属整治方面显示出前景.
- 复合物污染土壤中 (Cd) 和 (As) 的长期稳定,特别是在极端环境中,需要进一步研究.
研究的目的:
- 评估Fe-CGS在模拟极端降雨的情况下在酸性和性土壤中稳定Cd和As的长期有效性.
- 阐明受Fe-CGS添加影响的Cd和As的固定机制和生物可用性变化.
主要方法:
- 在用Fe-CGS修改的酸性 (JLG) 和性 (QD) 土壤上进行了模拟的长时间大雨漏实验.
- 采用多种提取技术来分析Cd和As的化学特异和生物可用性.
- 使用连续提取来追踪Cd和As物种随时间的变化.
主要成果:
- Fe-CGS显著降低了JLG土壤液中的Cd和As度,并降低了它们的生物可用性.
- 在QD土壤中,Fe-CGS显著降低了As度和可用性,对Cd度的影响较小,但可用性降低.
- Fe-CGS促进了Cd转化为更稳定的形式 (可氧化和酸溶性) 和As转化为无形的铁氧化物结合和残留形式.
结论:
- Fe-CGS有效地提高了土壤的pH值,并阻止了Cd和As在极端降雨下漏的迁移.
- 该材料通过将它们转化为更稳定的化学形式来增强Cd和As的长期稳定性.
- 在污染土壤中,Fe-CGS在降低重金属生物利用率和流动性方面表现出令人满意的表现.
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