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Application of urease-producing microbial community in seawater to dust suppression in desert.
- Source :
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Environmental research [Environ Res] 2023 Feb 15; Vol. 219, pp. 115121. Date of Electronic Publication: 2022 Dec 20. - Publication Year :
- 2023
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Abstract
- In order to solve the dust problem caused by sandstorms, this paper aims to propose a new method of enriching urease-producing microbial communities in seawater in a non-sterile environment. Besides, the difference of dust suppression performance of enriched microorganisms under different pH conditions was also explored to adapt the dust. The Fourier-transform infrared spectrometry (FTIR) and Scanning electron microscopy (SEM) confirmed the formation of CaCO <subscript>3</subscript> . The X-ray diffraction (XRD) further showed that the crystal forms of CaCO <subscript>3</subscript> were calcite and vaterite. When urease activity was equivalent, the alkaline environment was conducive to the transformation of CaCO <subscript>3</subscript> to more stable calcite. The mineralization rate at pH = 10 reached the maximum value on the 7 <superscript>th</superscript> day, which was 97.49 ± 1.73%. Moreover, microbial community analysis results showed that the relative abundance of microbial community structure was different under different pH enrichment. Besides, the relative abundance of Sporosarcina, a representative genus of urease-producing microbial community, increased with the increase of pH under culture conditions, which consistent with the mineralization performance results. In addition, the genus level species network diagram also showed that in the microbial community, Sporosarcina was negatively correlated with another urease-producing genus Bacillus, and had a reciprocal relationship with Atopostipes, which means that the urease-producing microbial community was structurally stable. The enrichment of urease-producing microbial communities in seawater will provide empirical support for the large-scale engineering application of MICP technology in preventing and controlling sandstorms in deserts.<br />Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2022 Elsevier Inc. All rights reserved.)
- Subjects :
- Calcium Carbonate chemistry
X-Ray Diffraction
Seawater
Urease
Sporosarcina
Subjects
Details
- Language :
- English
- ISSN :
- 1096-0953
- Volume :
- 219
- Database :
- MEDLINE
- Journal :
- Environmental research
- Publication Type :
- Academic Journal
- Accession number :
- 36549485
- Full Text :
- https://doi.org/10.1016/j.envres.2022.115121