应用了第一个基于微的微生物诱导的自我愈合碳酸材料,以防止Pb离子的迁移
Zhong-Fei Xue1, Wen-Chieh Cheng1, Lin Wang1
1School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering (XAUAT), Xi'an, 710055, China.
Environmental research
|October 20, 2023
概括
基于微囊的自我愈合材料有效地使 (Pb) 固定,即使在恶劣的pH条件下也可以防止迁移. 这种创新方法显著提高了污染环境中的重金属修复.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 微生物学 微生物学
背景情况:
- (Pb) 积累给环境和健康带来了风险.
- 微生物诱导碳酸盐沉 (MICP) 用于Pb固定,但在恶劣的pH值下不稳定.
- 不稳定性可能导致Pb2+迁移,需要改进补救策略.
研究的目的:
- 开发和评估基于微囊的微生物诱导的自愈碳酸 (MICC) 材料,以防止Pb迁移.
- 评估MICC材料在酸性条件下的稳定性和有效性.
- 为了研究矿物成分和微生物成分参与Pb固定.
主要方法:
- 使用酵母提取物,NH4Cl和Mn2+优化了细菌分泌条件.
- 使用微囊来保护细菌子在发芽和酸暴露期间.
- 使用微分析和FTIR分析矿物沉物 (石,石,石) 和细胞外聚合物质 (EPSs).
- 量化 Pb 固定效率,有或没有 MICC 材料.
主要成果:
- 在最佳条件下实现了95.8%的分泌率.
- 微囊保护细菌子免受酸性处理,确保生长和繁殖.
- 证实了石,石,石和EPSs参与结合Pb2+和Ca2+的存在.
- 使用MICC材料实现了90%以上的Pb固定效率,而未使用MICC材料的效率低于5%.
结论:
- 基于微囊的自我愈合的MICC材料为Pb固定提供了稳定有效的解决方案.
- 这些材料防止Pb迁移,即使在恶劣的pH条件下,传统的MICP也会失败.
- 该研究强调了这项技术在具有挑战性的环境中强大的重金属整治方面的潜力.
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