铁基材料对下水道系统中硫化物控制的影响
Dan Yin1, Chengwang Fan1, Shilei Sun1
1State Key Laboratory of Urban-rural Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Water research
|December 26, 2025
概括
铁基材料有效控制下水道硫化 (H2S),通过增强微生物硫的去除和抑制硫酸盐的减少. FeOOH表现出卓越的性能,在10天内保持零H2S排放.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 材料科学 材料科学 材料科学
背景情况:
- 硫化 (H2S) 在下水道基础设施和混凝土结构中引起显著的腐蚀.
- 有效控制H2S对于保持废水系统的完整性和安全性至关重要.
- 铁基材料被探索为减轻H2S的潜在解决方案.
研究的目的:
- 研究不同铁物种 (FeOOH,Fe3O4,Fe2O3,Fe+C) 在控制下水道H2S的有效性.
- 阐明这些铁基材料对硫代谢细菌,基因和酶的影响.
- 了解硫转化的多层次 (物质-微生物-酶) 机制.
主要方法:
- 在下水道环境中评估四种铁基材料的H2S控制性能.
- 研究微生物群体的反应,包括与硫相关的基因和酶活动.
- 模拟生物降解Fe2+离子与硫酸盐降解通路的相互作用.
主要成果:
- 微生物活动提高了铁材料的硫化物 (S2−) 去除能力的17.92倍.
- 铁基材料抑制了硫酸盐 (SO42−) 减少,促进了COD分解,并提供了性.
- FeOOH显示了最高的S2−控制 (405.14毫克S/gFe),零H2S (g) 排放10天,以及显著的FeS形成,与其结构和丰富的减少铁的细菌有关.
- Fe2O3促进了直接的物种间电子转移 (DIET),将电子从SO42−减少转向.
- 由于限制的饮食和缓慢的氧化速率,Fe+C的效率有限.
- 模拟预测Fe2+离子干扰SO42−结合和细胞内SO42−减少酶.
结论:
- 铁基材料,特别是FeOOH,通过微生物增强和抑制硫酸盐减少,有效控制下水道H2S.
- 这些机制涉及材料特性,微生物相互作用 (DIET) 和对硫代谢酶的直接影响.
- 这项研究提供了一个全面的了解,以铁为基础的H2S控制在下水道在多个生物和化学水平.
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