一项关于提高沙子稳定性和通过干旱地区的细菌处理来最大限度地减少尘埃排放的调查
Huan Tao1, Panpan Jiang2, Jili Qu3
1College of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, Shanghai, 200093, China.
Scientific reports
|August 14, 2025
概括
微生物诱导的碳酸盐沉 (MICP) 有效地稳定了沙漠沙子,大大减少了95%的风侵蚀. 这种环保方法为干旱土地恢复和控制荒漠化提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 地质地质地质地质地质地
- 微生物学 微生物学
背景情况:
- 荒漠化和风力侵蚀在干旱地区构成了重大挑战,需要创新和可持续的稳定技术.
- 传统的方法往往无法提供长期的有效性和环境兼容性,以稳定沙子.
研究的目的:
- 调查微生物诱导碳酸盐沉 (MICP) 在塔克利马坎沙漠沙子稳定中的有效性.
- 评估MICP对沙子承载能力,风侵蚀,地特性和透性的影响.
- 在现场条件下确定MICP的最佳应用协议.
主要方法:
- 在人造沙丘和形沙土上进行了实地试验,使用Sporosarcina pasteurii诱导碳酸沉.
- MICP的治疗包括在不同的喷雾周期频率 (1-8个周期) 中应用细菌和凝固溶液 (尿素,化,营养物质).
- 评估包括承载能力测试,风侵蚀测量,地厚度分析,透性测试和微结构分析 (SEM,XRD,EDS).
主要成果:
- MICP处理显著提高了表面稳定性,达到高达346.67kPa的承载能力,并将风侵蚀降低了95%.
- 处理形成了耐用的CaCO3 (厚度高达21.02毫米),填充了90%以上的粒子间孔,使透率降低到1.2 × 10−4厘米/秒.
- 8个喷雾周期的协议被证明是最佳的,通过干湿周期测试以最小的质量损失 (<2.9%) 证明了弹性.
结论:
- 微生物诱导碳酸盐沉 (MICP) 是一种高效和环保的技术,用于在干旱环境中稳定沙子和控制荒漠化.
- 该研究验证了MICP作为传统方法的可扩展,可持续的替代方案,提供卓越的机械性能和环境兼容性.
- 优化的MICP应用增强了土壤结构和耐用性,在具有挑战性的干旱生态系统中为土地恢复提供了长期可行性.
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