关于矿区中复合污染物被矿尾矿中的缩硫酸盐降解细菌固定化的研究
Xuezhe Zhu1,2,3,4,5,6, Yupin Zhou7,8, Mingjiang Zhang1,3,4,5,6
1National Engineering Research Center for Environment-friendly Metallurgy in Producing Premium Non-ferrous Metals, China GRINM Group Co., Ltd., Beijing, China.
Frontiers in microbiology
|December 11, 2025
概括
减少硫酸盐的细菌有效地使矿开采中的污染物像Sb,As,Pb,Cd,Cu和Zn. 该方法为修复矿业影响环境中的复杂复合物污染提供了一个有希望的解决方案.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 地质化学 地质化学
背景情况:
- 矿开采区面临着由共存的阴离子金属 (Sb,As) 和阴离子重金属 (Pb,Cd,Cu,Zn) 造成的复杂污染.
- 对于这些复合污染物而言,有效的整治策略对于环境保护至关重要.
研究的目的:
- 研究使用缩硫酸盐降解细菌 (SRB) 来固定矿区的复合污染物.
- 优化SRB活动的营养条件,并评估它们在修复模拟废水和实际尾矿方面的效率.
主要方法:
- 使用修改后门介质从尾矿中提升本土SRB的丰富.
- 优化营养素 (碳,,来源) 以增强SRB活动.
- 在模拟的采矿废水和尾矿中应用富化SRB,然后对固定产品进行表征 (SEM-EDS,XRD,FT-IR).
主要成果:
- 丰富的SRB社区由*Clostridium*属主导.
- 确定了最佳营养度,以增强SRB活动和Fe2+固定 (>90%).
- 在模拟废水中,Sb (97.9%),As (82.8%),Pb (91.7%),Cd (99.7%),Cu (99.5%) 和Zn (99.8%) 的高固定率得到实现.
- 固定产品包括金属硫化物,碳酸盐,氧化物和微生物EPS.
- 在废弃物中,Zn修复是有效的,而Sb和As的再溶解通过降低硫酸盐度而减少.
结论:
- 目标缩SRB有效地固定了矿废水中的各种污染物.
- 微生物细胞外聚合物和生物组织在固定过程中发挥作用.
- 基于SRB的修复显示了管理复杂的金属化物和重金属污染的潜力,需要根据特定的尾矿条件 (例如硫酸盐水平) 进行调整.
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