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通过使用基于金属氧化物的气凝复合材料和生物炭,工程减轻Cd和Pb在共同污染的土壤中的漏

Daryoush Sanaei¹, Mohammad Sarmadi^2,3, Mohammad H Dehghani^4,5

¹Faculty of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran. daryoushsanaei@gmail.com.

Environmental science. Processes & impacts

|November 2, 2023

概括

基于金属氧化物的碳气凝复合材料有效地固定污染土壤中的重金属,如和. 这种新型材料显著减少了金属漏,并通过内部球体复合增强了稳定性.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
土壤科学土壤科学

背景情况:

重金属污染对环境构成重大风险.
基于金属的纳米材料显示出对环境修复的希望.
金属氧化物-碳气凝复合物的有效性在酸性土壤中的重金属固定仍未得到充分研究.

研究的目的:

评估一种基于金属氧化物的新型碳气凝复合材料 (MO-CAg) 在受污染的土壤中固定 (Cd) 和 (Pb) 的性能.
为了比较MO-CAg与子卷纤维生物炭 (CCFB) 和碳气凝 (CAg) 的有效性.
阐明由MO-CAg.负责重金属稳定的机制.

主要方法:

在模拟酸性条件下将MO-CAg,CCFB和CAg应用于多金属污染的土壤.
评估重金属 (Cd和Pb) 的浸出.
对Cd和Pb的地化学分量的分析.
研究金属-土壤相互作用和复杂化机制.

主要成果:

MO-CAg显著减少了Pb出67-75%和Cd出60-65%.
MO-CAg增加了Cd和Pb的残留分数,表明增强了稳定性.
机制包括 (共同) 沉,氧化还原反应和内部球体复合,加强金属氧化物键.

结论:

MO-CAg是一种高效的材料,可以在污染的土壤中固定Cd和Pb,性能优于CAg和CCFB.
这项研究阐明了MO-CAg的高级稳定机制,涉及内部球体复合.
MO-CAg为修复重金属污染环境提供了一个有希望的解决方案,特别是在酸性条件下.

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