对被铜和污染的土壤进行自给自足的化整治的可行性和固化机制研究
Shunfu Yang1, Zejing Dong1, Bin Zhu1
1Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, Yunnan, PR China.
Environmental research
|February 21, 2024
概括
使用玉米的自主燃烧 (SSS) 通过改变金属形式而不是含量,有效地修复受污染的土壤中的铜和. 这种方法通过生物炭吸附和化学复合使重金属固定不动.
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:
- 土壤重金属污染对人类健康和生态系统构成重大风险.
- 现场热处理,就像自维持燃烧 (SSS) 一样,对有机污染物是有效的,但受到金属污染土壤中燃料可用性的限制.
研究的目的:
- 调查使用玉米作为燃料修复污染土壤中的铜 (Cu) 和 (Pb) 的SSS的可行性.
- 阐明SSS在土壤中的重金属的修复机制.
主要方法:
- 在重金属污染的土壤中使用玉米作为燃料的SSS的应用.
- 对土壤物理化学性质的分析 (pH,EC,TP,TK,AP,AK,TN,AN,CEC).
- 评估重金属的物种化 (氧化状态,残留形式) 和可性 (TCLP,DTPA提取).
主要成果:
- SSS显著改变了土壤特性,增加了pH,EC,TP,TK,AP和AK,同时减少了TN,AN和CEC.
- Cu的氧化状态增加,Pb的残留状态显著增加.
- 有毒性特征漏程序 (TCLP) 和甲基胺酸 (DTPA) 的Cu和Pb的可提取分数大幅减少.
结论:
- 使用玉米的SSS是一种可行的修复技术,用于污染土壤中的铜和.
- 修复机制涉及改变金属物种和固定,而不是减少金属含量.
- 关键的固定机制包括生物炭吸附,与基组复合,π电子结合和结晶化合物的形成.
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