洞察矿物与微生物的相互作用,通过微生物诱导的酸盐沉与各种酸盐矿物质进行的固定
Xiaohui Ma1, Zhi Luo1, Yahui Yu1
1State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China.
Journal of hazardous materials
|September 19, 2025
概括
酸 (HAP) 与溶解细菌 (PSB) 结合,通过形成稳定的沉物,有效地固定 (Cd). 这种矿物微生物方法提高了土壤的健康状况,并降低了Cd在受污染的环境中的生物可用性.
科学领域:
- 环境微生物学 环境微生物学
- 生物地质化学生物地质化学
- 土壤修复土壤的修复.
背景情况:
- 微生物诱导的酸盐沉 (MIPP) 显示了 (Cd) 固定化的潜力.
- 源成分对MIPP效率和土壤微生物对Cd固定反应的影响需要进一步研究.
研究的目的:
- 评估溶性细菌 (PSB) 与不同矿物质 (酸,岩,酸) 的Cd固定能力.
- 了解PSB和矿物质组合对土壤微生物学和Cd生物可用性的影响.
主要方法:
- 一种高Cd耐受性和酸盐溶解的细菌的分离,Pseudomonas sp. ML1. 在ML1. 在ML1.
- 使用酸 (CP),岩 (PR) 和酸 (HAP) 测试ML1的Cd固定效率.
- 固定产品的表征和评估土壤Cd生物可用性,可用的,酶活性和微生物基因丰度.
主要成果:
- 在24小时内,HAP-ML1 (Hydroxyapatite-ML1) 实现了99.90%的Cd去除,明显优于CP-ML1和PR-ML1.
- 稳定的Cd-酸盐沉物 (Ca4.03Cd0.97(PO4) 3OH和 (Ca7.7Cd0.5) ((PO4) 6 ((H2O) 2.4) 由HAP-ML1形成,在pH1.0-9.0.0之间稳定.
- 在土壤中,HAP-ML1降低了Cd的生物可用性,增加了可用的和酸酶活性,并增强了酸盐溶解和Cd抗性基因的丰富性.
结论:
- 氧酸盐与Pseudomonas sp.结合在一起 ML1对Cd固定非常有效,形成稳定的矿产产品.
- HAP-ML1系统积极调节土壤微生物群落,增加与循环和金属抵抗相关的关键功能基因.
- 这种矿物微生物混合方法表明,对Cd污染土壤的修复有很大的潜力.
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