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Zhang Y, Tang J, Wang S, Zhou X, Peng C, Zhou H, Wang D, Lin H, Xiang W, Zhang Q, Cai T, Yu X. Mechanism of deltamethrin biodegradation by Brevibacillus parabrevis BCP-09 with proteomic methods. CHEMOSPHERE 2024; 350:141100. [PMID: 38171393 DOI: 10.1016/j.chemosphere.2023.141100] [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: 07/25/2023] [Revised: 11/02/2023] [Accepted: 12/30/2023] [Indexed: 01/05/2024]
Abstract
Ester-containing deltamethrin pesticides are widely used in farmland and have inevitable side effects on the biosphere and human health. Microbia have been used for efficient degradation of deltamethrin, but the related mechanism and enzyme characteristics have not been elucidated. In this study, a species Brevibacillus parabrevis BCP-09 could degrade up to 75 mg L-1 deltamethrin with a degradation efficiency of 95.41%. Proteomic and genomic methods were used to explore its degradation mechanism. Enzymes belonged to hydrolases, oxidases and aromatic compound degrading enzymes were expressed enhanced and might participate in the deltamethrin degradtion. RT-PCR experiment and enzyme activity analysis verified the degradation of deltamethrin by bacterial protein. Additionally, the formation of endospores can help strain BCP-09 resist the toxicity of deltamethrin and enhance its degradation. This study supplies a scientific evidence for the application of Brevibacillus parabrevis BCP-09 in the bioremediation of environmental pollution and enriches the resources of deltamethrin-biodegradable proteins.
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Affiliation(s)
- Yingyue Zhang
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China
| | - Jie Tang
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China; Food Microbiology Key Laboratory of Sichuan Province, Xihua University, Chengdu, 610039, Sichuan, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Xihua University, Chengdu, 610039, China.
| | - Su Wang
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China
| | - Xuerui Zhou
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China
| | - Chuanning Peng
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China
| | - Hu Zhou
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China
| | - Dan Wang
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China
| | - Haoran Lin
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China
| | - Wenliang Xiang
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China; Food Microbiology Key Laboratory of Sichuan Province, Xihua University, Chengdu, 610039, Sichuan, China
| | - Qing Zhang
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China; Food Microbiology Key Laboratory of Sichuan Province, Xihua University, Chengdu, 610039, Sichuan, China
| | - Ting Cai
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China; Food Microbiology Key Laboratory of Sichuan Province, Xihua University, Chengdu, 610039, Sichuan, China
| | - Xuan Yu
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, China; Food Microbiology Key Laboratory of Sichuan Province, Xihua University, Chengdu, 610039, Sichuan, China
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He W, Jiang R, Li S, Zhang M, Zhang T, Zhu X, Wang X. Biodegradation mechanism of chlortetracycline by a novel fungal Aspergillus sp. LS-1. CHEMOSPHERE 2023; 340:139792. [PMID: 37579822 DOI: 10.1016/j.chemosphere.2023.139792] [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: 02/13/2023] [Revised: 06/04/2023] [Accepted: 08/09/2023] [Indexed: 08/16/2023]
Abstract
Chlortetracycline (CTC), a widely used typical tetracycline antibiotic, has raised increasing concerns due to its potential health and environmental risks. Biodegradation is considered an effective method to reduce CTC in environment. In this study, a strain Aspergillus sp. LS-1, which can efficiently degrade CTC, was isolated from CTC-rich activated sludge. Under optimal conditions, the maximum removal efficiency of CTC could reach 95.41%. Temperature was the most significant factor affecting the degradation efficiency of LS-1. The 19 products were identified in the CTC degradation by strain LS-1, and three degradation pathways were proposed. All the degradation pathways for CTC exhibited ring-cleaving, which may accelerate the mineralization of CTC. To gain more comprehensive insights into this strain, we obtained the genome of LS-1, which had high GC content (50.1%) and completeness (99.3%). The gene annotation revealed that LS-1 contains some vital enzymes and resistance genes that may carry functional genes involved in the CTC degradation. In addition, other antibiotic resistance genes were found in the genome of LS-1, indicating that LS-1 has the potential to degrade other antibiotics. This study provides a more theoretical basis for the investigation of CTC degradation by fungi and new insights into the biodegradation of CTC.
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Affiliation(s)
- Wenshan He
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Run Jiang
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Siqi Li
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Minglu Zhang
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry,Beijing Technology and Business University,Beijing 100048,China
| | - Tingting Zhang
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xiaobiao Zhu
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Xiaohui Wang
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
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Li Y, Chen H, Wang Y, Yang Z, Zhang H. Efficient biodegradation of chlortetracycline in high concentration from strong-acidity pharmaceutical residue with degrading fungi. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127671. [PMID: 34799176 DOI: 10.1016/j.jhazmat.2021.127671] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 10/04/2021] [Accepted: 10/29/2021] [Indexed: 06/13/2023]
Abstract
Chlortetracycline (CTC) pharmaceutical residue with strong acidity and in high CTC concentration is a hazardous solid waste. There is a huge attention but few studies on whether and how the CTC raw residue (CRR) can be degraded in microbiological way. In this study, three self-screened fungi, LJ245, LJ302 and LJ318, were used and thoroughly investigated to remove CTC, strong acidity and biotoxicity in CRR. The result disclosed that the concentration of CTC decreased rapidly in the first seven days and declined slowly subsequently, and the decreasing curve was similar to "L" shape. the corresponding degradation ratios of three strains were 95.73%, 98.53% and 98.07%, respectively. Meanwhile, numerous intermediates in degradation appeared in early days and gradually reduced, and eventually disappeared once the degradation time was long enough, among which eleven intermediates from CTC were identified. Moreover, the strong acidity of CRR declined dramatically using this biological method along with the CTC being metabolized, the pH value increased from 2.30 to 8.32 in the first 7 days. The toxicity of CRR was significantly reduced by LJ302 with inhibition rate from 96.02% to no inhibition effect to Micrococcus luteus. Therefore, CTC, strong acidity and biotoxicity of CRR could be effectively removed simultaneously through a biodegradation process driven with proposed strains.
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Affiliation(s)
- Yanju Li
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China.
| | - Haibo Chen
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China; Université Paris Saclay, INRAE, AgroParisTech, Micalis Institute, 78350 Jouy en Josas, France
| | - Yuzhou Wang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
| | - Zhengli Yang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Huiyan Zhang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
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Chen YP, Zheng CH, Huang YY, Chen YR. Removal of chlortetracycline from water using spent tea leaves-based biochar as adsorption-enhanced persulfate activator. CHEMOSPHERE 2022; 286:131770. [PMID: 34364234 DOI: 10.1016/j.chemosphere.2021.131770] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/28/2021] [Accepted: 07/31/2021] [Indexed: 06/13/2023]
Abstract
Antibiotic compounds have caused serious environmental concerns. In this study, we developed an effective technology for treatment of chlortetracycline (CTC), a widely used antibiotic compound. A natural heteroatom-doped spent tea leaves-based biochar (STLB) with excellent adsorption and catalytic property was prepared by simple thermal treatment. An adsorption-promoted persulfate-based advanced oxidation process (PS-AOP) using STLB was studied for CTC removal. The results showed that the as-prepared STLB presented favorable adsorption affinity towards CTC with the maximum adsorption capacity of 627 mg g-1. Meanwhile, CTC enriched on the surface of STLB was good for in-situ decomposition of CTC and nearly 97.4 % of CTC was removed within 30 min of pre-adsorption and 60 min of subsequent degradation. The STLB had excellent recyclability and wide pH tolerance range of 3.0-9.0 in combined pre-adsorption and PS-AOP. Reactive oxygen species analysis confirmed that CTC degradation was mainly due to non-radical (singlet oxygen, 1O2) and radicals (SO4- and OH). This study suggests that STLB is a promising adsorption-enhanced PS activator for the treatment of refractory wastewater and also provides a strategy of waste control by spent tea leaves.
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Affiliation(s)
- Yi-Ping Chen
- College of Resources and Environment, Quanzhou Normal University, 398 Donghai Road, Quanzhou, 362000, China.
| | - Chao-Hong Zheng
- College of Resources and Environment, Quanzhou Normal University, 398 Donghai Road, Quanzhou, 362000, China
| | - Yao-Yi Huang
- College of Resources and Environment, Quanzhou Normal University, 398 Donghai Road, Quanzhou, 362000, China
| | - Yi-Ren Chen
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
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