氧化还原活性共火解碳增强了电子转移,并减轻了污染土壤中石油碳化合物的危害
Chengze Yu1, Haipeng Huang2, Ran Song3
1College of Management and Economics, Tianjin University, Tianjin 300072, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, Singapore 117575, Singapore.
Journal of hazardous materials
|March 12, 2026
概括
合氧化碳 (CPC) 通过增强氧化还原介导生物降解,有效地修复了被石油污染的土壤. 这种可持续的方法改善了土壤的健康状况,并减少了碳化合物的毒性.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 生物修复是一种生物修复.
背景情况:
- 石油碳化合物污染由于疏水性和毒性而带来重大环境风险.
- 传统的整治方法经常面临效率和可持续性的挑战.
- 了解氧化还原介导生物降解对于有效的土壤整治至关重要.
研究的目的:
- 评估从油污泥和生物质中提取的氧化还原活性共溶性碳 (CPC) 的有效性,用于修复受石油污染的土壤.
- 调查由CPC促进的潜在的氧化还原介导生物降解机制.
- 评估CPC对土壤物理化学性质,酶活动和微生物群落的影响.
主要方法:
- 从油性污泥和生物质中制备氧化还原活性共火解碳 (CPC).
- 在不同剂量的CPC应用于石油污染的土壤.
- 分析总石油碳化合物 (TPHs) 和多环芳 (PAHs) 的去除.
- 评估土壤的物理化学特性,氧化降解潜力 (ORP) 和酶活性 (多氧化酶,CYP450).
- 微生物社区分析和结构方程建模以阐明降解途径.
主要成果:
- 最佳CPC剂量 (3%) 实现了93.07%的TPHs去除,在180天后,烯 (89.03%) 和烯 (72.45%) 显著减少.
- CPC修正案改善了土壤有机物,多孔性和ORP,提高了污染物的生物可用性和氧化还原条件.
- CPC增强了溶解有机物的电子传递能力,增加了氧化酶活动,并丰富了关键的碳化合物降解细菌 (Microvirga,Brevibacillus,Sphingomonas).
结论:
- 合氧化碳作为有效的氧化还原媒介,促进污染土壤中石油碳化合物的生物降解.
- 通过氧化还原介导的电子运输,CPC增强了土壤的物理化学特性和微生物代谢.
- 本研究将CPC作为一种可持续和有效的策略,用于减轻土壤生态系统中的石油污染.
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