Analysis of limestone mine dust curing based on microbially induced calcium carbonate precipitation and its mechanism

被引：3

作者：

Li, Xilin ^{[1
]}

Huang, Fazhi ^{[1
]}

Sun, Qi ^{[1
]}

Ling, Hao ^{[1
]}

Liu, Jijia ^{[1
]}

An, Yanli ^{[1
]}

Liu, Ling ^{[1
]}

机构：

[1] Liaoning Tech Univ, Sch Civil Engn, 88 Yulong Rd, Fuxin 123000, Liaoning, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2024年 / 12卷 / 05期

关键词：

Microbial dust suppressant; Microbially induced carbonate precipitation; (MICP); Limestone mine dust suppression; Glycerol; Urease; SUPPRESSION; CEMENTATION; SURFACTANT;

D O I：

10.1016/j.jece.2024.114041

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To address dust pollution in a limestone mining area, we successfully prepared an efficient glycerol-microbial dust suppressant using Sporosarcina pasteurii XL-1 and glycerol via microbially induced carbonate precipitation. The results revealed that glycerol not only improved the wettability of the dust suppressant but also promoted bacterial growth. The dust suppressant exhibited excellent surface tension, water retention, and wind erosion resistance under the conditions of mineralizing bacteria incubation for 24 h, 0.8 mol/L cementing fluid, and 1 % glycerol concentration. Microscopy revealed that calcite crystals formed in the treated dust, which effectively connected the dust particles and formed a stable CaCO3-dust cementation layer, enhancing the dust suppression effect. The results not only revealed that adding glycerol can improve the effectiveness of dust suppressants but also demonstrated that MICP is a promising technique for limestone mine dust management.

引用

页数：12

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