在矿加工残留物 (COPR) 污染的土壤中有效减少和固定CrVI:与典型的还原剂进行比较研究
Rong Xu1, Ya-Nan Wang1, Shupeng Li2
1School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China.
Ecotoxicology and environmental safety
|September 28, 2023
概括
将硫酸铁与厨房废物消化剂相结合,可以有效地修复受污染的土壤中的六价 (Cr(VI)). 这种绿色方法显著降低了Cr (VI) 水平,并增强了微生物的恢复,以长期稳定土壤.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 微生物学 微生物学
背景情况:
- 六价 (Cr(VI)) 对环境构成重大风险.
- 矿加工残留物 (COPR) 是土壤污染的主要来源.
- 有效和可持续的修复策略对于管理Cr (VI) 污染至关重要.
研究的目的:
- 评估铁硫酸盐和厨房废物消化剂在COPR污染的土壤中用于Cr (VI) 整治的联合应用.
- 为了比较这种结合治疗与各种化学还原剂的疗效.
- 研究治疗对微生物群落和Cr (VI) 稳定性的影响.
主要方法:
- 铁硫酸盐和厨房废物消化剂应用于COPR污染的土壤.
- 系统评估Cr (VI) 减少和固定.
- 与单一化学减少剂 (硫酸铁,零价值铁,硫酸,硫酸铁,聚硫酸) 的比较.
- 使用X射线光电子光谱 (XPS) 和微生物社区评估进行分析.
主要成果:
- 铁硫酸盐和消化剂的组合在60天内达到5.07毫克/公斤的Cr (VI) 含量.
- 泄漏中的Cr(VI) 度低于检测限值,符合危险废物标准.
- 该处理显著降低了Cr污染的风险水平,从非常高降低到很低.
- 证实XPS增强了Cr (VI) 的降低和稳定.
- 微生物分析显示,减少Cr (VI) 的细菌数量增加,碳和代谢增强.
结论:
- 铁硫酸盐和厨房废物消化剂的联合使用是一种高效和可持续的方法,用于在COPR污染的土壤中修复CrVI.
- 这种方法比单一化学减少剂具有优势,包括更低的剂量要求和长期修复效果.
- 处理促进有益的土壤微生物的恢复和繁荣,有助于整体土壤健康和CrVI稳定.
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