干旱区生态环境知识资源中心(Arid): Insight into the influence of pH on the precipitation induced by bacteria

Arid

DOI	10.1111/sum.12779
	Insight into the influence of pH on the precipitation induced by bacteria
	Li, Lixia; Liu, Tianle; Jiang, Guosheng; Fang, Changliang; Zheng, Shaojun; Qu, Bo; Zhu, Yunfei
通讯作者	Liu, TL (corresponding author), China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China.
来源期刊	SOIL USE AND MANAGEMENT
ISSN	0266-0032
EISSN	1475-2743
出版年	2021-11
英文摘要	In recent years, microbial mineralization has aroused great attention in soil remediation. The pH is one of the critical factors that control the microbial mineralization process. However, the interaction mechanism between the environment pH and the mineralization process has not been clarified yet. This paper focused on the growth of bacteria, urease activity and the calcium utilization rate. Besides, we detected the particle size distribution, morphological characteristics and the composition of precipitations formed at different pH. Moreover, we evaluated the triaxial compressive strength of sand columns processed by different pH consolidation solutions. Additionally, the volume fraction of precipitations and its spatial distribution in sand columns were analysed by X-ray CT. The results demonstrated that pH significantly influences the growth of bacteria and urease activity, especially in the bacteria's early growth stage. This paper also indicates that the environmental pH impacts the volume fraction of precipitations, affecting the consolidation properties. We also found a negative correlation between the cohesion and the total volume fraction of precipitations. In contrast, there was a positive correlation between the friction angle and the total volume fraction of precipitations. Moreover, we observed that the precipitations mainly distributed in the pores and throats, increasing the sand particles' roughness. Furthermore, we proposed four cementing models for the spatial relationship between the precipitations and the sand particles, which provides new insight into the consolidation mechanism. This paper guides us to promote this environmentally friendly technology to treat soil liquefaction and desertification.
英文关键词	calcium utilization rate cementing model consolidation property microbial mineralization pH
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000720483900001
WOS关键词	CARBONATE PRECIPITATION ; SOIL
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374610
作者单位	[Li, Lixia; Liu, Tianle; Jiang, Guosheng; Fang, Changliang; Zheng, Shaojun; Qu, Bo; Zhu, Yunfei] China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Li, Lixia,Liu, Tianle,Jiang, Guosheng,et al. Insight into the influence of pH on the precipitation induced by bacteria[J],2021.
APA	Li, Lixia.,Liu, Tianle.,Jiang, Guosheng.,Fang, Changliang.,Zheng, Shaojun.,...&Zhu, Yunfei.(2021).Insight into the influence of pH on the precipitation induced by bacteria.SOIL USE AND MANAGEMENT.
MLA	Li, Lixia,et al."Insight into the influence of pH on the precipitation induced by bacteria".SOIL USE AND MANAGEMENT (2021).