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Xu C, Zhao X, Duan H, Gu W, Zhang D, Wang R, Lu X. Synergistic enzymatic mechanism of lepidolite leaching enhanced by a mixture of Bacillus mucilaginosus and Bacillus circulans. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 947:174711. [PMID: 38997041 DOI: 10.1016/j.scitotenv.2024.174711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 06/29/2024] [Accepted: 07/09/2024] [Indexed: 07/14/2024]
Abstract
Numerous studies have demonstrated that the co-leaching of ores by different silicate bacteria significantly improves the performance of bioleaching systems. Nevertheless, the mechanism of different silicate bacteria synergistically or complementarily enhanced the leaching process of lithium-containing silicate remains unclear. This study discussed the leaching impact of the combined presence of two metabolically distinct silicate bacteria on lepidolite, with the aim of comprehending the synergistic effect resulting from the presence of Bacillus mucilaginosus and Bacillus circulans in the leaching process. The results indicated that the polysaccharides and proteins secreted by bacteria-containing functional groups such as -OH and -COOH, which played an important role in the complex decomposition of ores. Organic acids played the role of acid etching and complexation. Bacillus mucilaginosus and Bacillus circulans exhibited low individual leaching efficiency, primarily due to their weak organic acid secretion. Moreover, the prolific polysaccharide production by Bacillus mucilaginosus led to bacterial aggregation, diminishing contact capability with minerals. Bacillus circulans decomposed the excessive polysaccharides produced by Bacillus mucilaginosus through enzymatic hydrolysis in the co-bioleaching process, providing later nutrient supply for both strains. The symbiosis of the two strains enhanced the synthesis and metabolic capabilities of both strains, resulting in increased organic acid secretion. In addition, protein and humic acid production by Bacillus mucilaginosus intensified, collectively enhancing the leaching efficiency. These findings suggested that the primary metabolic products secreted by different bacterial strains in the leaching process differ. The improvement in bioleaching efficiency during co-leaching was attributed to their effective synergistic metabolism. This work contributes to the construction of an efficient engineering microbial community to improve the efficiency of silicate mineral leaching, and reveals the feasibility of microbial co-culture to improve bioleaching.
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Affiliation(s)
- Chao Xu
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, PR China
| | - Xingqing Zhao
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, PR China.
| | - Huaiyu Duan
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, PR China
| | - Wei Gu
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, PR China
| | - Du Zhang
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, PR China
| | - Rucheng Wang
- State Key Laboratory for Mineral Deposit Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, PR China
| | - Xiancai Lu
- State Key Laboratory for Mineral Deposit Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, PR China
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Al-Asbahi MGSS, Al-Ofiry BA, Saad FAA, Alnehia A, Al-Gunaid MQA. Silver nanoparticles biosynthesis using mixture of Lactobacillus sp. and Bacillus sp. growth and their antibacterial activity. Sci Rep 2024; 14:10224. [PMID: 38702368 PMCID: PMC11068879 DOI: 10.1038/s41598-024-59936-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 04/16/2024] [Indexed: 05/06/2024] Open
Abstract
The biosynthesis of nanoparticles offers numerous advantages, including ease of production, cost-effectiveness, and environmental friendliness. In our research, we focused on the bioformation of silver nanoparticles (AgNPs) using a combination of Lactobacillus sp. and Bacillus sp. growth. These AgNPs were then evaluated for their biological activities against multidrug-resistant bacteria. Our study involved the isolation of Bacillus sp. from soil samples and Lactobacillus sp. from raw milk in Dhamar Governorate, Yemen. The synthesized AgNPs were characterized using various techniques such as UV-visible spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The antibacterial properties of the AgNPs were assessed using the modified Kirby Bauer disk diffusion method against multidrug-resistant strains of Staphylococcus aureus and Pseudomonas aeruginosa. Our results demonstrated that the use of a bacterial mixture for biosynthesis led to faster and more effective production of AgNPs compared to using a single bacterium. The UV-visible spectra showed characteristic peaks indicative of silver nanoparticles, while XRD analysis confirmed the crystalline nature of the synthesized particles. FTIR results suggested the presence of capping proteins that contribute to the synthesis and stability of AgNPs. Furthermore, TEM images revealed the size and morphology of the AgNPs, which exhibited spherical shapes with sizes ranging from 4.65 to 22.8 nm. Notably, the antibacterial activity of the AgNPs was found to be more pronounced against Staphylococcus aureus than Pseudomonas aeruginosa, indicating the potential of these nanoparticles as effective antimicrobial agents. Overall, our study highlights the promising antibacterial properties of AgNPs synthesized by a mixture of Lactobacillus sp. and Bacillus sp. growth. Further research is warranted to explore the potential of utilizing different bacterial combinations for enhanced nanoparticle synthesis.
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Affiliation(s)
- Morad G S S Al-Asbahi
- Department of Biology, Faculty of Sciences, Sana'a University, 12081, Sana'a, Yemen.
| | - Bashir A Al-Ofiry
- Department of Biology, Faculty of Sciences, Sana'a University, 12081, Sana'a, Yemen
| | - Fuad A A Saad
- Department of Biology, Faculty of Applied Sciences, Thamar University, 87246, Dhamar, Yemen
| | - Adnan Alnehia
- Department of Physics, Faculty of Applied Sciences, Thamar University, 87246, Dhamar, Yemen
| | - Murad Q A Al-Gunaid
- Department of Chemistry, Faculty of Education, Thamar University, 87246, Dhamar, Yemen
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Lv Y, Li J, Chen Z, Liu X, Chen B, Zhang M, Ke X, Zhang TC. Effects of different silicate minerals on silicon activation by Ochrobactium sp. T-07-B. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:87393-87401. [PMID: 35809170 DOI: 10.1007/s11356-022-21824-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 11/10/2021] [Indexed: 06/15/2023]
Abstract
As a kind of solid waste with a high silicon content, electrolytic manganese residue (EMR) can be utilized as silicon source by plants through bioleaching processes. EMR contains a variety of silicate minerals. In order to determine the source of available silicon in the bioleaching process of EMR, it is necessary to investigate the influence of silicate minerals in EMR on silicon-activating behavior of specific minerals. In this study, Ochrobactium sp. T-07-B was used to conduct bioleaching experiments on five kinds of silicate minerals with different structures (quartz, muscovite, biotite, olivine, and rhodonite); the growth of Ochrobactium sp. T-07-B, their acid- and polysaccharide-producing capacity, and evolution of surface morphology and structure of the silicate minerals in different systems were determined, so as to explore the silicon-activating capacity of Ochrobactium sp. T-07-B and the selectivity toward different minerals in the bioleaching process. Results showed that the effects of Ochrobactium sp. T-07-B for different silicate minerals were obviously different, and the sequence of silicon-activating efficiency from high to low was as follows: muscovite (65.84 mg·L-1) > biotite (63.84 mg·L-1) > olivine (55.76 mg·L-1) > rhodonite (50.98 mg·L-1) > quartz (23.63 mg·L-1). Results of this study may be of guiding significance for the future research on the silicon-activating behavior of solid waste.
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Affiliation(s)
- Ying Lv
- National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd, Beijing, 100088, China
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- GRINM Resources and Environment Tech. Co., Ltd, Beijing, 101407, China
- General Research Institute for Nonferrous Metals, Beijing, 100088, China
| | - Jia Li
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, China.
| | - Zhenxing Chen
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, China
| | - Xingyu Liu
- National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd, Beijing, 100088, China
- GRINM Resources and Environment Tech. Co., Ltd, Beijing, 101407, China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407, China
| | - Bowei Chen
- National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd, Beijing, 100088, China
- GRINM Resources and Environment Tech. Co., Ltd, Beijing, 101407, China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407, China
| | - Mingjiang Zhang
- National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd, Beijing, 100088, China
- GRINM Resources and Environment Tech. Co., Ltd, Beijing, 101407, China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407, China
| | - Xuan Ke
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, China
| | - Tian C Zhang
- Civil & Environmental Engineering Department, College of Engineering, University of Nebraska-Lincoln, Omaha, NE, 68182, USA
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Zhu X, Gong W, Li W, Bai X, Zhang C. Reclamation of waste coal gangue activated by Stenotrophomonas maltophilia for mine soil improvement: Solubilizing behavior of bacteria on nutrient elements. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 320:115865. [PMID: 35944325 DOI: 10.1016/j.jenvman.2022.115865] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/20/2022] [Accepted: 07/23/2022] [Indexed: 06/15/2023]
Abstract
The coal gangue has occupied the farmland and caused severe pollution to the surrounding environment, which was discharged with vast amount as a by-product of coal mining and washing. A sustainable and ecological microorganism activation method was proposed to disposal coal gangue as mineral fertilizer. A Stenotrophomonas maltophilia YZ1 bacteria was separated and found to be useful in solubilizing nutrient elements in coal gangue. The contents of available P, available K and available Si in the treated coal gangue reached 278.4 mg/kg, 1305.3 mg/kg and 522.7 mg/kg, respectively. The YZ1 bacteria dissolved the minerals of monetite (CaHPO4), muscovite and annite by the organic acids, which were the metabolism product of YZ1 bacteria. The solubilizing mechanisms of phosphate minerals included the release of protic and the chelation of organic acid with calcium. The microbial activation method can provide nutrient elements for soil, which may realize the reclamation of coal gangue in a harmless way.
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Affiliation(s)
- Xiaobo Zhu
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo Henan, 454000, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology Wuhan Hubei, 430081, China; Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Jiaozuo Henan, 454000, China
| | - Wenhui Gong
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo Henan, 454000, China
| | - Wang Li
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo Henan, 454000, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology Wuhan Hubei, 430081, China.
| | - Xueyu Bai
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo Henan, 454000, China
| | - Chuanxiang Zhang
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo Henan, 454000, China; Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Jiaozuo Henan, 454000, China
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Lv Y, Li J, Ye H, Du D, Sun P, Ma M, Zhang TC. Bioleaching of silicon in electrolytic manganese residue (EMR) by Paenibacillus mucilaginosus: Impact of silicate mineral structures. CHEMOSPHERE 2020; 256:127043. [PMID: 32445999 DOI: 10.1016/j.chemosphere.2020.127043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 04/26/2020] [Accepted: 05/09/2020] [Indexed: 06/11/2023]
Abstract
Electrolytic manganese residue (EMR) is characterized by high silicon content, and thus, is an important silicon source. While considerable research has been conducted on bioleaching EMR for silicon recovery, sufficient information is not available on the impact of specific silicate mineral structures in EMR on silicon bioleaching. In the present study, the mineral composition of EMR was determined firstly, and then the leaching effect of Paenibacillus mucilaginosus on these different silicate minerals were investigated by shake flask experiments. Results showed that the silicon in EMR was mainly composed of quartz, sericite, muscovite, biotite, olivine and rhodonite; Paenibacillus mucilaginosus had a significantly different weathering and decomposition effects on different silicate minerals. Among them, sericite, muscovite and biotite with layered structure had the most obvious silicon leaching effect, followed by rhodonite with island structure, while silicon leaching from olivine with chained structure and quartz with frame structure was much more difficult. One can roughly judge the adaptability of bioleaching of silicon in EMR using Paenibacillus mucilaginosus if the main form of silicate minerals in EMR is determined.
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Affiliation(s)
- Ying Lv
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, PR China
| | - Jia Li
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, PR China; School of Forestry & Environmental Studies, Yale University, New Haven, 06511, CT, United States.
| | - Hengpeng Ye
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, PR China
| | - Dongyun Du
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, PR China
| | - Peng Sun
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, PR China
| | - Mengyu Ma
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, PR China
| | - Tian C Zhang
- Civil Engineering Department, University of Nebraska-Lincoln (Omaha Campus), Omaha, NE, 68182, USA
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