Dust suppression performance and dust suppression mechanism of microbial induced struvite precipitation technology

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-12 DOI:10.1016/j.powtec.2025.120905

Peidong Zhao , Xiangming Hu , Yanyun Zhao , Mingyue Wu , Yue Feng , Jingqian Wang , Ziyuan Wu

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引用次数: 0

Abstract

Microbially Induced Calcium Carbonate Precipitation (MICP) is regarded as a promising dust suppression method. However, the MICP bio-cementation process driven by urease releases ammonia, causing adverse environmental effects. This study explores a novel microbial dust suppressant based on microbial-induced struvite precipitation technology. Compared with traditional MICP technology, microbial induced struvite precipitation can convert ammonium ions into environmentally friendly biological struvite. Biological struvite not only plays a role in fixing ammonia, but also plays a role in consolidating dust like carbonate precipitation in MICP. The results indicate that the microbial dust suppressant prepared with a molar ratio of K₂HPO₄·3H₂O to MgCl₂ of 1:2 can fix 69.92 % of ammonia, achieve a wind erosion resistance rate of 99.83 %, and a rain erosion resistance rate of 87.97 %, demonstrating excellent ammonia fixation and dust suppression performance. The microbial dust suppressant produced by this technology can generate struvite and MgCO₃. The formed granular and lamellar mineralization products are embedded between dust particles, effectively filling the pores of coal dust. Molecular dynamics simulations suggest that struvite and magnesium carbonate molecules play a crucial role in the physical adsorption process and energy changes of coal dust molecules. In conclusion, the microbial dust suppressant prepared using microbial-induced struvite technology exhibits excellent dust suppression and ammonia fixation properties. In future research, the applicability of this technology in the field of dust suppression can be enhanced by reducing costs, increasing ammonia fixation rate, and regulating the production of by-product magnesium hydrogen phosphate.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.