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在堆肥过程中通过CaO₂和Fe₃O₄改善了化和Cr(VI) 固定

Li Chen¹, Zhigang Yi¹, Yaoning Chen¹

¹College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.

Bioresource technology

|September 12, 2024

概括

氧化铁纳米材料和过氧化通过在堆肥过程中促进湿化和减少六价 (Cr(VI)) 来增强土壤修复. 这种方法还丰富了有益的细菌,以有效减少CrVI.

科学领域:

环境科学环境科学
土壤科学土壤科学
纳米技术纳米技术

背景情况:

六价 (Cr(VI)) 的污染对环境构成重大风险.
堆肥是一种可行的有机废物管理和土壤整治方法.
在堆肥过程中制定有效的策略来增强Cr(VI) 固定和减少是至关重要的.

研究的目的:

研究氧化铁纳米材料 (Fe3O4 NMs) 和过氧化 (CaO2) 对化和CrVI修复的作用.
评估Fe3O4 NMs和CaO2在Cr(VI) 固定和减少在油茶Camellia粉和Cr污染土壤的堆肥过程中的综合影响.

主要方法:

用Fe3O4 NMs和CaO2.2修改过的Cr污染土壤和油茶Camellia粉的堆肥.
构建和分析一个类似芬顿的反应系统.
刺激-发射矩阵-平行因子 (EEM-PARAFAC) 分析用于酸表征.
测量残留的Cr和Cr (VI) 度.
微生物社区分析,重点关注降低Cr (VI) 的细菌.

主要成果:

Fe3O4 NMs和CaO2有效地启动了类似芬顿的反应,加速了化和增加了酸生成.
在60天的治疗后,观察到Cr-VI显著减少16.36%,RES-Cr增加5.91%.
添加Fe3O4 NMs和CaO2促进了关键的Cr(VI) 降解细菌的丰富,包括Bacillus,Pseudomonas和Psychrobacter.

结论:

在堆肥过程中,Fe3O4 NMs和CaO2是有效的修改剂,可以增强Cr (VI) 修复.
这些修订引发的芬顿式反应在化和CrVI减少中起着关键作用.
这项研究提供了一种新的方法和理论基础,通过堆肥来纠正Cr (VI) 污染.

关键词:

在CaO(2) 中.堆肥化堆肥化堆肥化这就是Cr (VI) 的意思.像芬顿这样的东西.油茶 - - 卡梅利亚花

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