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微观沉积-属性关系在微生物诱导的煤尘整合中的微观沉积-属性关系

Qingshan Wang¹, Xiangming Hu¹, Yanyun Zhao²

¹College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China; Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China.

Environmental research

|December 21, 2023

概括

微生物诱导碳酸盐沉 (MICP) 产生了有效的煤灰抑制剂. 与聚合物沉积相比,碳酸的表面沉积提供了优越的耐侵蚀性,增强了煤灰控制应用.

科学领域:

环境科学环境科学
地质技术工程地质技术工程
微生物学微生物学

背景情况:

微生物诱导碳酸盐沉 (MICP) 是一种新的方法,用于控制煤灰,使用生产尿素酶的微生物.
碳酸 (CaCO3) 沉积对于粉尘抑制至关重要,但现场沉积特征及其与侵蚀抵抗的联系尚不清楚.
这种知识差距阻碍了基于MICP的防尘剂的工程应用.

研究的目的:

通过X射线计算机断层扫描 (X-CT) 使用不同的来源观察和量化生物凝固煤尘的微沉积特征.
提出沉积的概念框架,并研究其与侵蚀抵抗的相关性.
为MICP技术在煤炭粉尘抑制中的工程应用提供见解.

主要方法:

利用X射线计算机断层扫描 (X-CT) 技术分析生物凝固煤尘的微沉积.
使用各种源 (化,乳酸,酸) 调查的沉积特征.
量化了沉积特征 (孔径,CaCO3覆盖) 和侵蚀阻力 (值脱落速度) 之间的关系.

主要成果:

化和乳酸诱导的聚合物CaCO3沉积,其特点是体积小,中心聚合,外表松散,以及模糊的毛孔.
酸诱导表面CaCO3沉积,形成内部扩展的大体积,提供高煤尘覆盖率和完整的孔凝固.
表面沉积导致与聚合物沉积相比,值脱离速度增加了17.619.1%,这是由于CaCO3结合的强度.

结论:

在基于MICP的煤灰抑制中,来源的类型显著影响CaCO3沉积模式 (聚合物与表面).
表面沉积提供优越的耐侵蚀性,由于更好的孔隙覆盖和更强的颗粒粘合.
结合多孔性和CaCO3覆盖的双因素模型有效预测侵蚀性,指导实际的MICP应用.

关键词:

扫描 CT 扫描扫描 CT 扫描煤炭灰尘是什么意思煤炭灰尘是什么意思存款的特点存款的特点耐侵蚀性耐侵蚀性耐侵蚀性耐侵蚀性微生物诱导的碳酸盐沉

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