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Hu J, Yang P, Mei K, Chen J, Yang F, Wu M, Yu J, Chen J, Zheng J. Biodegradation of 3-methylpyridine by an isolated strain, Gordonia rubripertincta ZJJ. BIORESOURCE TECHNOLOGY 2024; 412:131303. [PMID: 39214183 DOI: 10.1016/j.biortech.2024.131303] [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: 05/11/2024] [Revised: 08/08/2024] [Accepted: 08/15/2024] [Indexed: 09/04/2024]
Abstract
Methylpyridines are a class of highly toxic pyridine derivatives. In this study, a novel degrading bacterium was isolated for 3-methylpyridine (3-MP) degradation (Gordonia rubripertincta ZJJ, GenBank accession NO. OP430847.1; CCTCC M 2022975). The maximum specific degradation rate, half-saturation constant and inhibition constant were fitted to be 0.48 h-1, 88.3 mg L-1 and 924.0 mg L-1, respectively. During 3-MP biodegradation, the lost total organic carbon was transformed into CO2 (67.4 %) and biomass (32.6 %), and ammonia nitrogen was almost the sole inorganic species with a conversion rate of 36.3 %. Three metabolic pathways were possibly involved in 3-MP degradation: I) methyl oxidation followed by ring hydroxylation and hydrogenation; II) rupture of C=C and C-N bonds after ring reduction; III) initial ring hydroxylation. The study not only provides a novel strain for the high-efficient degradation of 3-MP, but also contributes to an in-depth understanding of 3-MP biotransformation.
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Affiliation(s)
- Jun Hu
- College of Environment, Zhejiang University of Technology, 18 Chao-wang Road, Hangzhou 310014, China; Innovation Research Center for Advanced Environmental Technology, Eco-industrial Innovation Institute ZJUT, 2 Rong-chang East Road, Quzhou 324400, China
| | - Peiyao Yang
- College of Environment, Zhejiang University of Technology, 18 Chao-wang Road, Hangzhou 310014, China
| | - Kun Mei
- Ningbo Huayan Energy Efficiency Environmental Protection Safety Design and Research Co., Ltd., 123 Bao-shan Road, Ningbo 315800, China
| | - Jiang Chen
- Ningbo Huayan Energy Efficiency Environmental Protection Safety Design and Research Co., Ltd., 123 Bao-shan Road, Ningbo 315800, China
| | - Feng Yang
- Innovation Research Center for Advanced Environmental Technology, Eco-industrial Innovation Institute ZJUT, 2 Rong-chang East Road, Quzhou 324400, China
| | - Meng Wu
- College of Environment, Zhejiang University of Technology, 18 Chao-wang Road, Hangzhou 310014, China
| | - Jianming Yu
- College of Environment, Zhejiang University of Technology, 18 Chao-wang Road, Hangzhou 310014, China.
| | - Jianmeng Chen
- College of Environment, Zhejiang University of Technology, 18 Chao-wang Road, Hangzhou 310014, China
| | - Jiajun Zheng
- College of Environment, Zhejiang University of Technology, 18 Chao-wang Road, Hangzhou 310014, China
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Xie Y, Feng NX, Huang L, Wu M, Li CX, Zhang F, Huang Y, Cai QY, Xiang L, Li YW, Zhao HM, Mo CH. Improving key gene expression and di-n-butyl phthalate (DBP) degrading ability in a novel Pseudochrobactrum sp. XF203 by ribosome engineering. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174207. [PMID: 38914327 DOI: 10.1016/j.scitotenv.2024.174207] [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: 04/30/2024] [Revised: 06/20/2024] [Accepted: 06/21/2024] [Indexed: 06/26/2024]
Abstract
Di-n-butyl phthalate (DBP) is one of the important phthalates detected commonly in soils and crops, posing serious threat to human health. Pseudochrobactrum sp. XF203 (XF203), a new strain related with DBP biodegradation, was first identified from a natural habitat lacking human disturbance. Genomic analysis coupled with gene expression comparison assay revealed this strain harbors the key aromatic ring-cleaving gene catE203 (encoding catechol 2,3-dioxygenase/C23O) involved DBP biodegradation. Following intermediates identification and enzymatic analysis also indicated a C23O dependent DBP lysis pathway in XF203. The gene directed ribosome engineering was operated and to generate a desirable mutant strain XF203R with highest catE203 gene expression level and strong DBP degrading ability. The X203R removed DBP in soil jointly by reassembling bacterial community. These results demonstrate a great value of XF203R for the practical DBP bioremediation application, highlighting the important role of the key gene-directed ribosome engineering in mining multi-pollutants degrading bacteria from natural habitats where various functional genes are well conserved.
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Affiliation(s)
- Yunchang Xie
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China; Jiangxi Key Laboratory of Organic Chemistry, Institute of Organic Functional Molecules, Jiangxi Science and Technology Normal University, Nanchang 330013, Jiangxi, China
| | - Nai-Xian Feng
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Li Huang
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Miaoer Wu
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China
| | - Cheng-Xuan Li
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Fantao Zhang
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China
| | - Yunhong Huang
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China
| | - Quan-Ying Cai
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Lei Xiang
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yan-Wen Li
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Hai-Ming Zhao
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ce-Hui Mo
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
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Shah BA, Malhotra H, Papade SE, Dhamale T, Ingale OP, Kasarlawar ST, Phale PS. Microbial degradation of contaminants of emerging concern: metabolic, genetic and omics insights for enhanced bioremediation. Front Bioeng Biotechnol 2024; 12:1470522. [PMID: 39364263 PMCID: PMC11446756 DOI: 10.3389/fbioe.2024.1470522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2024] [Accepted: 09/05/2024] [Indexed: 10/05/2024] Open
Abstract
The perpetual release of natural/synthetic pollutants into the environment poses major risks to ecological balance and human health. Amongst these, contaminants of emerging concern (CECs) are characterized by their recent introduction/detection in various niches, thereby causing significant hazards and necessitating their removal. Pharmaceuticals, plasticizers, cyanotoxins and emerging pesticides are major groups of CECs that are highly toxic and found to occur in various compartments of the biosphere. The sources of these compounds can be multipartite including industrial discharge, improper disposal, excretion of unmetabolized residues, eutrophication etc., while their fate and persistence are determined by factors such as physico-chemical properties, environmental conditions, biodegradability and hydrological factors. The resultant exposure of these compounds to microbiota has imposed a selection pressure and resulted in evolution of metabolic pathways for their biotransformation and/or utilization as sole source of carbon and energy. Such microbial degradation phenotype can be exploited to clean-up CECs from the environment, offering a cost-effective and eco-friendly alternative to abiotic methods of removal, thereby mitigating their toxicity. However, efficient bioprocess development for bioremediation strategies requires extensive understanding of individual components such as pathway gene clusters, proteins/enzymes, metabolites and associated regulatory mechanisms. "Omics" and "Meta-omics" techniques aid in providing crucial insights into the complex interactions and functions of these components as well as microbial community, enabling more effective and targeted bioremediation. Aside from natural isolates, metabolic engineering approaches employ the application of genetic engineering to enhance metabolic diversity and degradation rates. The integration of omics data will further aid in developing systemic-level bioremediation and metabolic engineering strategies, thereby optimising the clean-up process. This review describes bacterial catabolic pathways, genetics, and application of omics and metabolic engineering for bioremediation of four major groups of CECs: pharmaceuticals, plasticizers, cyanotoxins, and emerging pesticides.
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Affiliation(s)
| | | | | | | | | | | | - Prashant S. Phale
- Department of Biosciences and Bioengineering, Indian Institute of Technology-Bombay, Mumbai, India
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Pereyra-Camacho MA, Balderas-Hernández VE, Barba-de la Rosa AP, De Leon-Rodriguez A. Whole-cell biocatalysis for phthalate esters biodegradation in wastewater by a saline soil bacteria SSB-consortium. CHEMOSPHERE 2024; 364:143243. [PMID: 39233295 DOI: 10.1016/j.chemosphere.2024.143243] [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: 03/14/2024] [Revised: 08/22/2024] [Accepted: 08/31/2024] [Indexed: 09/06/2024]
Abstract
Phthalic acid esters (PAE) are widely used as plasticizers and have been classified as ubiquitous environmental contaminants of primary concern. PAE have accumulated intensively in surface water, groundwater, and wastewaters; thus, PAE degradation is essential. In the present study, the ability of a saline soil bacteria (SSB)-consortium to degrade synthetic wastewater-phthalates with alkyl chains of different lengths, such as diethyl phthalate (DEP), di-n-butyl phthalate (DBP), benzyl butyl phthalate (BBP), and di (2-ethylhexyl) phthalate (DEHP) was characterized. A central composite design-response surface methodology was applied to optimize the degradation of each phthalate, where the independent variables were temperature (21-41 °C), pH (5.3-8.6) and PAE concentration (79.5-920.4 mg L-1), and Gas Chromatography-Mass Spectrometry was used to identify the metabolites generated during phthalate degradation. Optimal conditions were 31 °C, pH 7.0, and an initial PAE concentration of 500 mg L-1, where the SSB-consortium removed 84.9%, 98.47%, 99.09% and 98.25% of initial DEP, DBP, BBP, and DEHP, respectively, in 168h. A first-order kinetic model explained - the biodegradation progression, while the half-life of PAE degradation ranged from 12.8 to 29.8 h. Genera distribution of the SSB-consortium was determined by bacterial meta-taxonomic analysis. Serratia, Methylobacillus, Acrhomobacter, and Pseudomonas were the predominant genera; however, the type of phthalate directly affected their distribution. Scanning electron microscopy analysis showed that high concentrations (1000 mg L-1) of phthalates induced morphological alterations in the bacterial SSB-consortium. The metabolite profiling showed that DEP, DBP, BBP, and DEHP could be fully metabolized through the de-esterification and β-oxidation pathways. Therefore, the SSB-consortium can be considered a potential candidate for bioremediation of complex phthalate-contaminated water resources.
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Affiliation(s)
- Marco A Pereyra-Camacho
- IPICyT, Instituto Potosino de Investigación Científica y Tecnológica A.C. Camino a la Presa San José No. 2055, Lomas 4a sección, San Luis Potosí, San Luis Potosí, 78216 Mexico
| | - Victor E Balderas-Hernández
- IPICyT, Instituto Potosino de Investigación Científica y Tecnológica A.C. Camino a la Presa San José No. 2055, Lomas 4a sección, San Luis Potosí, San Luis Potosí, 78216 Mexico
| | - Ana P Barba-de la Rosa
- IPICyT, Instituto Potosino de Investigación Científica y Tecnológica A.C. Camino a la Presa San José No. 2055, Lomas 4a sección, San Luis Potosí, San Luis Potosí, 78216 Mexico
| | - Antonio De Leon-Rodriguez
- IPICyT, Instituto Potosino de Investigación Científica y Tecnológica A.C. Camino a la Presa San José No. 2055, Lomas 4a sección, San Luis Potosí, San Luis Potosí, 78216 Mexico.
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Hou Z, Pan H, Gu M, Chen X, Ying T, Qiao P, Cao J, Wang H, Hu T, Zheng L, Zhong W. Simultaneously degradation of various phthalate esters by Rhodococcus sp. AH-ZY2: Strain, omics and enzymatic study. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134776. [PMID: 38852255 DOI: 10.1016/j.jhazmat.2024.134776] [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: 03/14/2024] [Revised: 05/14/2024] [Accepted: 05/29/2024] [Indexed: 06/11/2024]
Abstract
Phthalate esters (PAEs) are widely used as plasticizers and cause serious complex pollution problem in environment. Thus, strains with efficient ability to simultaneously degrade various PAEs are required. In this study, a newly isolated strain Rhodococcus sp. AH-ZY2 can degrade 500 mg/L Di-n-octyl phthalate completely within 16 h and other 500 mg/L PAEs almost completely within 48 h at 37 °C, 180 rpm, and 2 % (v/v) inoculum size of cultures with a OD600 of 0.8. OD600 = 0.8, 2 % (v/v). Twenty genes in its genome were annotated as potential esterase and four of them (3963, 4547, 5294 and 5359) were heterogeneously expressed and characterized. Esterase 3963 and 4547 is a type I PAEs esterase that hydrolyzes PAEs to phthalate monoesters. Esterase 5294 is a type II PAEs esterase that hydrolyzes phthalate monoesters to phthalate acid (PA). Esterase 5359 is a type III PAEs esterase that simultaneously degrades various PAEs to PA. Molecular docking results of 5359 suggested that the size and indiscriminate binding feature of spacious substrate binding pocket may contribute to its substrate versatility. AH-ZY2 is a potential strain for efficient remediation of PAEs complex pollution in environment. It is first to report an esterase that can efficiently degrade mixed various PAEs.
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Affiliation(s)
- Zhengyu Hou
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Hejuan Pan
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Mengjie Gu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiaowang Chen
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Tongtong Ying
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Pei Qiao
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Junwei Cao
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Haixia Wang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Tong Hu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Lianbao Zheng
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Weihong Zhong
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China.
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Wang L, Li Z, Li M, Chen Y, Zhang Y, Bao W, Wang X, Qi Z, Zhang W, Tao Y. Mechanisms of synthetic bacterial flora YJ-1 to enhance cucumber resistance under combined phthalate-disease stresses. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 365:121564. [PMID: 38944953 DOI: 10.1016/j.jenvman.2024.121564] [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: 05/29/2024] [Revised: 06/15/2024] [Accepted: 06/18/2024] [Indexed: 07/02/2024]
Abstract
Biotic and abiotic stresses have emerged as major constraints to agricultural production, causing irreversible adverse impacts on agricultural production systems and thus posing a threat to food security. In this study, a new strain of Bacillus subtilis DNYB-S1 was isolated from soil contaminated with Fusarium wilt. It was found that artificially synthetic flora (YJ-1) [Enterobacter sp. DNB-S2 and Rhodococcus pyridinovorans DNHP-S2, DNYB-S1] could effectively mitigate both biotic (Fusarium wilt) and abiotic (phthalates) sources of stresses, with the inhibition rate of YJ-1 resistant to wilt being 71.25% and synergistic degradation of 500 mg/L PAEs was 91.23%. The adaptive difference of YJ-1 was 0.59 and the ecological niche overlap value was -0.05 as determined by Lotka-Volterra modeling. These results indicate that YJ-1 has good ecological stability. The major degradation intermediates included 2-ethylhexyl benzoate (EHBA), phthalic acid (PA), diisobutyl phthalate (DIBP), and butyl benzoate, suggesting that YJ-1 can provide a more efficient pathway for PAEs degradation. In addition, there was metabolic mutualism among the strains that will selectively utilize the provided carbon source (some metabolites of PAEs) for growth. The pot experiment showed that YJ-1 with cucumber reduced the incidence of cucumber wilt by 45.31%. YJ-1 could reduce the concentration of PAEs (DBP: DEHP = 1:1) in soil species from 30 mg/kg to 4.26 mg/kg within 35 d, with a degradation efficiency of 85.81%. Meanwhile, the concentration of PAEs in cucumber was reduced to 0.01 mg/kg, indicating that YJ-1 is directly involved in the degradation of soil PAEs and the enhancement of plant immunity. In conclusion, this study provides a new perspective for the development of customized microbiomes for phytoremediation under combined biotic-abiotic stresses in agricultural production processes.
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Affiliation(s)
- Lei Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, PR China
| | - Zhe Li
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, PR China
| | - MingZe Li
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, PR China
| | - YuXin Chen
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, PR China
| | - Ying Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, PR China.
| | - WenJing Bao
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, PR China
| | - XiaoDong Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, PR China
| | - ZeWei Qi
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, PR China
| | - WenQian Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, PR China
| | - Yue Tao
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, PR China
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Tao HY, Shi J, Zhang J, Ge H, Liu X, Li XY. Phthalic acid esters: Are they a big concern for rivers flowing into reservoir with ecological facilities? WATER RESEARCH 2024; 258:121785. [PMID: 38761595 DOI: 10.1016/j.watres.2024.121785] [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: 12/15/2023] [Revised: 04/19/2024] [Accepted: 05/13/2024] [Indexed: 05/20/2024]
Abstract
The city-river-reservoir system is an important system for safeguarding drinking water. Phthalic acid esters (PAEs) are emerging contaminants in drinking water sources that are gaining attention, and they could pose risks to human health and aquatic organisms. In this study, field studies that lasted four years were conducted to analyze the concentrations, spatial-temporal distribution, and removal effects of six PAEs. The total concentrations of the Σ6PAEs in the water and sediment samples were 0.2-7.4 μg L-1 (mean: 1.3 μg L-1) and 9.2-9594.1 ng g-1 (mean: 847.5 ng g-1), respectively. Di-n-butyl phthalate (DBP) and, bis(2-ethylhexyl) phthalate (DEHP) were the predominant congeners, accounting for 57.2 % in the water samples and 94.1 % in the sediment samples. The urban area contributed 72 % of the PAEs in the system. A significant removal effect of PAEs was observed in the wetland, with a removal rate of 40.2 %. The partitioning of PAEs between the water and sediment was attributed to the removal of dimethyl phthalate and diethyl phthalate that occurred during the water phase, while the removal of DBP and DEHP primarily occurred during the sediment phase. The ecological risk calculation based on the sensitivity distribution model indicated that DBP (HQwater = 0.19, HQsediment = 0.46) and DEHP (HQwater = 0.20, HQsediment = 0.13) possessed moderate risks according to some water and sediment samples. The ecological projects were verified to be effective engineering strategies to reduce ecological risk in the drinking water source.
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Affiliation(s)
- Huan-Yu Tao
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Environmental Engineering Research Centre, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
| | - Jianghong Shi
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Jiawei Zhang
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Environmental Engineering Research Centre, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China; Institute of Strategic Planning, Chinese Academy of Environmental Planning, Ministry of Ecology and Environment, Beijing 100041, China
| | - Hui Ge
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xiaowei Liu
- School of Biology, Food and Environment, Hefei University, Hefei 230601, China
| | - Xiao-Yan Li
- Environmental Engineering Research Centre, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China.
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Sun X, Zhang X, Li Z, Wang T, Zeng J, Liu Y, Li Z, Li L. Efficient remediation of di-(2-ethylhexyl) phthalate and plant-growth promotion with the application of a phosphate-solubilizing compound microbial agent. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171904. [PMID: 38527548 DOI: 10.1016/j.scitotenv.2024.171904] [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: 01/09/2024] [Revised: 03/18/2024] [Accepted: 03/20/2024] [Indexed: 03/27/2024]
Abstract
The ecotoxic endocrine-disrupting chemical di-(2-ethylhexyl) phthalate (DEHP) is ubiquitous in agricultural soil, posing a serious threat to human health. Here, we report efficient soil-borne DEHP degradation and plant growth promotion by a microbial organic fertilizer GK-PPB prepared by combining a recycled garden waste-kitchen waste compost product with ternary compound microbial agent PPB-MA, composed of Penicillium oxalic MB08F, Pseudomonas simiae MB751, and Bacillus tequilensis MB05B. The combination of MB08F and MB751 provided synergistic phosphorus solubilization, and MB05B enhanced the DEHP degradation capacity of MB08F via bioemulsification. Under optimal conditions (25.70 °C and pH 7.62), PPB-MA achieved a 96.81 % degradation percentage for 1000 mg L-1 DEHP within 5 days. The degradation curve followed first-order kinetics with a half-life of 18.24 to 24.76 h. A complete mineralization pathway was constructed after identifying the degradation intermediates of 2H-labeled DEHP. Evaluation in Caenorhabditis elegans N2 showed that PPB-MA eliminated the ecological toxicity of DEHP. A pakchoi (Brassica chinensis L.) pot experiment demonstrated that GK-PPB promoted phosphorus solubilization and plant growth, reduced soil DEHP residue, and decreased DEHP accumulation in pakchoi, suggesting its potential practical utility in environmentally responsible and safe cultivation of vegetables.
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Affiliation(s)
- Xiaowen Sun
- National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xue Zhang
- National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhi Li
- National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Tan Wang
- National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jie Zeng
- National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yongxuan Liu
- National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhe Li
- National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Lin Li
- National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
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9
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Wang J, Liu C, Cao Q, Li Y, Chen L, Qin Y, Wang T, Wang C. Enhanced biodegradation of microplastic and phthalic acid ester plasticizer: The role of gut microorganisms in black soldier fly larvae. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171674. [PMID: 38479533 DOI: 10.1016/j.scitotenv.2024.171674] [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: 01/04/2024] [Revised: 02/23/2024] [Accepted: 03/10/2024] [Indexed: 03/17/2024]
Abstract
Hermetia illucens larvae are recognized for their ability to mitigate or eliminate contaminants by biodegradation. However, the biodegradation characteristics of microplastics and phthalic acid esters plasticizers, as well as the role of larval gut microorganisms, have remained largely unrevealed. Here, the degradation kinetics of plasticizers, and biodegradation characteristics of microplastics were examined. The role of larval gut microorganisms was investigated. For larval development, microplastics slowed larval growth significantly (P < 0.01), but the effect of plasticizer was not significant. The degradation kinetics of plasticizers were enhanced, resulting in an 8.11 to 20.41-fold decrease in degradation half-life and a 3.34 to 3.82-fold increase in final degradation efficiencies, compared to degradation without larval participation. The depolymerization and biodeterioration of microplastics were conspicuously evident, primarily through a weight loss of 17.63 %-25.52 %, variation of chemical composition and structure, bio-oxidation and bioerosion of microplastic surface. The synergistic effect driven by larval gut microorganisms, each with various functions, facilitated the biodegradation. Specifically, Ignatzschineria, Paenalcaligenes, Moheibacter, Morganella, Dysgonomonas, Stenotrophomonas, Bacteroides, Sphingobacterium, etc., appeared to be the key contributors, owing to their xenobiotic biodegradation and metabolism functions. These findings offered a new perspective on the potential for microplastics and plasticizers biodegradation, assisted by larval gut microbiota.
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Affiliation(s)
- Jiaqing Wang
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
| | - Cuncheng Liu
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China; Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China.
| | - Qingcheng Cao
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
| | - Yun Li
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
| | - Li Chen
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
| | - Yuanhang Qin
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
| | - Tielin Wang
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
| | - Cunwen Wang
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China.
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10
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Li X, Jiang N, Zhang J, Yao X, Liu W, Wang Q, Ding J, Hu Z, Zhu L, Wang J, Wang J. Soil health hazards of di(2-ethylhexyl) phthalate: New perspectives on earthworms from different ecological niches DNA damage, gut microbial disruption and soil enzyme changes. JOURNAL OF HAZARDOUS MATERIALS 2024; 467:133700. [PMID: 38325098 DOI: 10.1016/j.jhazmat.2024.133700] [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: 10/14/2023] [Revised: 01/20/2024] [Accepted: 01/31/2024] [Indexed: 02/09/2024]
Abstract
Di(2-ethylhexyl) phthalate (DEHP) is perceived an emerging threat to terrestrial ecosystem, however, clear and accurate studies to fully understander ecotoxicity and underlying mechanisms of DEHP on the soil fauna remain poorly understood. Therefore, this study conducted a microcosm experiment of two earthworm ecotypes to investigate the ecological hazards of DHEP from multiple perspectives. The results showed that DEHP significantly increased the 8-hydroxy-deoxyguanosine (8-OHdG) content both in Eisenia foetida (13.76-133.0%) and Metaphire guillelmi (11.01-49.12%), leading to intracellular DNA damage. Meanwhile, DEHP negatively affected the expression of functional genes (ATP-6, NADH1, COX), which may be detrimental to mitochondrial respiration and oxidative stress at the gene level. The two earthworm guts shared analogous dominant bacteria however, the incorporation of DEHP drastically suppressed the homogeneity and diversity of the gut microbes, which further disrupted the homeostasis of the gut microbial ecological network. The keystone species in the gut of E. foetida decreased under DEHP stress but increased in the gut of M. guillelmi. Moreover, DEHP presented detrimental effects on soil enzyme activity, which is mainly associated with pollutant levels and earthworm activity. Collectively, the findings expand the understanding of soil ecological health and reveal the underlying mechanisms of the potential exposure risk to DEHP.
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Affiliation(s)
- Xianxu Li
- College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271000, PR China
| | - Nan Jiang
- College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271000, PR China; College of Natural Resources and Environment, Northwest A& F University, Yangling 712000, PR China
| | - Juan Zhang
- Shandong Institute for Product Quality Inspection, Jin'an 250100, PR China
| | - Xiangfeng Yao
- College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271000, PR China
| | - Wenrong Liu
- College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271000, PR China
| | - Qian Wang
- College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271000, PR China
| | - Jia Ding
- College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271000, PR China
| | - Zhuran Hu
- Shandong Green and Blue Bio-technology Co. Ltd, Tai'an 271000, PR China
| | - Lusheng Zhu
- College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271000, PR China
| | - Jinhua Wang
- College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271000, PR China
| | - Jun Wang
- College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271000, PR China.
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11
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Xu Y, Sun Y, Lei M, Hou J. Phthalates contamination in sediments: A review of sources, influencing factors, benthic toxicity, and removal strategies. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 344:123389. [PMID: 38246215 DOI: 10.1016/j.envpol.2024.123389] [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: 08/28/2023] [Revised: 11/18/2023] [Accepted: 01/16/2024] [Indexed: 01/23/2024]
Abstract
Sediments provide habitat and food for benthos, and phthalates (PAEs) have been detected in numerous river and marine sediments as a widely used plastic additive. PAEs in sediments is not only toxic to benthos, but also poses a threat to pelagic fish and human health through the food chain, so it is essential to comprehensively assess the contamination of sediments with PAEs. This paper presents a critical evaluation of PAEs in sediments, which is embodied in the analysis of the sources of PAEs in sediments from multiple perspectives. Biological production is indispensable, while artificial synthesis is the most dominant, thus the focus was on analyzing the industrial and commercial sources of synthetic PAEs. In addition, since the content of PAEs in sediments varies, some factors affecting the content of PAEs in sediments are summarized, such as the properties of PAEs, the properties of plastics, and environmental factors (sediments properties and hydrodynamic conditions). As endocrine disruptors, PAEs can produce toxicity to its direct contacts. Therefore, the effects of PAEs on benthos immunity, endocrinology, reproduction, development, and metabolism were comprehensively analyzed. In addition, we found that reciprocal inhibition and activation of the systems lead to genotoxicity and apoptosis. Finally, the paper discusses the feasible measures to control PAEs in wastewater and leachate from the perspective of source control, and summarizes the in-situ treatment measures for PAEs contamination in sediments. This paper provides a comprehensive review of PAEs contamination in sediments, toxic effects and removal strategies, and provides an important reference for reducing the contamination and toxicity of PAEs to benthos.
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Affiliation(s)
- Yanli Xu
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China.
| | - Yuqiong Sun
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China.
| | - Ming Lei
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China.
| | - Jing Hou
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China.
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12
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Ghafghazi L, Taghavi L, Rasekh B, Farahani H, Hassani AH. Application of compost assisted by Fe 3O 4 nanoparticles in di (2-ethylhexyl) phthalate-contaminated soil remediation: Biostimulation strategy, Soil responses, and RSM/CCD Optimization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168029. [PMID: 37898188 DOI: 10.1016/j.scitotenv.2023.168029] [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: 08/17/2023] [Revised: 10/01/2023] [Accepted: 10/20/2023] [Indexed: 10/30/2023]
Abstract
Globally, contamination of agricultural soils by phthalate esters (PAEs) caused by direct consumption of plastic mulch films has been confirmed. The most widely used plasticizer is di (2-ethylhexyl) phthalate (DEHP), which is a more recalcitrant endocrine-disrupting chemical (EDC). Because of its low solubility and hydrophobicity, it remains in the soil longer, causes bioaccumulation in agricultural products, and has negative repercussions for food safety. In this study, the performance of kitchen organic waste compost assisted by Fe3O4 nanoparticles in DEHP removal efficiency (%) and soil C:N ratio (two responses) was optimized using Response Surface Methodology (RSM) based on Central Composite Design (CCD) in Design-Expert software (11.0.3.0). Under optimum conditions, a DEHP concentration of 10 mg·kg-1 (dw soil), a retention time of 35 days, an NPs dose of 0.99 g·kg-1 (media), a removal efficiency of 91.6 %, and a soil C:N ratio of 10.5 with a desirability of 0.963 were determined. A quadratic model (P-value <0.0001, adjusted R2 = 0.974 (Y1), 0.943 (Y2)) was used to predict the variables and their interactions. The agricultural soil responses in the treatments amended by compost and Fe3O4 NPs (SCN) showed a significant increase in SOM, TC, TN, AP, K, and Fe nutrients when compared to the control (P < 0.05). After 35 days, in the SC1N3 treatment (DEHP concentration = 10 mg·kg-1, NPs dose =1.2 g·kg-1), with higher DEHP removal efficiency (89.57 %), the C:N:P ratio was equal to 100: 9.75:0.69, and the total microbial colony count was 3.6 × 109 CFU/ml at pH 7.45. The study found that compost nutrients and Fe-based nanoparticle micronutrients can enhance DEHP degradation by stimulating the soil's native microflora. As a result, the synergistic potential of compost and Fe3O4 nanoparticles can be considered a promising, cost-effective, and agri-environmentally friendly approach in the "assisted bioremediation" strategy of DEHP-contaminated soils.
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Affiliation(s)
- Laleh Ghafghazi
- Department of Environmental Science and Forest, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University (SRBIAU), P. O. Box 14515-775, Tehran, Iran
| | - Lobat Taghavi
- Department of Environmental Science and Forest, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University (SRBIAU), P. O. Box 14515-775, Tehran, Iran.
| | - Behnam Rasekh
- Environment & Biotechnology Division, Research Institute of Petroleum Industry (RIPI), P. O. Box: 14665-137, Tehran, Iran
| | - Hadi Farahani
- Research Institute of Petroleum Industry (RIPI), P. O. Box 1485733111, Tehran, Iran
| | - Amir Hessam Hassani
- Department of Environmental Engineering, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
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13
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Rashmi M, Singh T, Rajput NS, Kulshreshtha S. Biodegradation of di-2-ethylhexyl phthalate by Bacillus firmus MP04 strain: parametric optimization using full factorial design. Biodegradation 2023; 34:567-579. [PMID: 37354272 DOI: 10.1007/s10532-023-10043-4] [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: 05/01/2022] [Accepted: 05/30/2023] [Indexed: 06/26/2023]
Abstract
Di-2-ethylhexyl phthalate (DEHP) is used as a plasticizer in making plastics and released from landfills. This study attempted to degrade DEHP using microbial isolates. Isolates of Bacillus spp. were tested for their efficacy in degrading DEHP. Degradation was assessed using liquid chromatography-mass spectrometry (LC-MS). The most efficient DEHP degradation was achieved by Bacillus firmus MP04, which has been identified as Bacillus firmus MP04. This strain was found to use DEHP as the sole source of carbon without carbon source supplementation. Full factorial design was used to optimize the conditions for DEHP degradation which revealed the suitability of pH 7, 5% salt concentration, 20 to 37 °C temperature, and yeast extract as a nitrogen source. LC-MS elucidated the possible degradation mechanism via benzoic acid formation. However, prolonged incubation formed a typical compound denatonium benzoate due to reactions with other compounds. As maximum degradation was achieved in 4 days, prolonged incubation is not suggested. It can be concluded that new strain Bacillus firmus MP04 is the most efficient strain among all the tested strains for DEHP degradation.
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Affiliation(s)
- Madhavi Rashmi
- Department of Biotechnology, Magadh University, Bodh Gaya, Bihar, India
| | - Tanuja Singh
- Department of Botany, Patliputra University, Patna, Bihar, India
| | - Nitesh Singh Rajput
- Amity School of Engineering and Technology, Amity University Rajasthan, Jaipur, Rajasthan, 303007, India
| | - Shweta Kulshreshtha
- Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur, Rajasthan, 303007, India.
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Guan R, Wang L, Zhao Y, Huang F, Zhang Y, Wang X, Chen Y, Li M, Wang D. The mechanism of DEHP degradation by the combined action of biochar and Arthrobacter sp. JQ-1: Mechanisms insight from bacteria viability, degradation efficiency and changes in extracellular environment. CHEMOSPHERE 2023; 341:140093. [PMID: 37678595 DOI: 10.1016/j.chemosphere.2023.140093] [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: 06/06/2023] [Revised: 08/18/2023] [Accepted: 09/05/2023] [Indexed: 09/09/2023]
Abstract
Di(2-ethylhexyl) phthalate (DEHP) has been widely detected in soil, water, and sediment as a priority control pollutant. Immobilized microorganism technology is gradually mature and applied in production. Biochar prepared from agricultural wastes is an excellent immobilized carrier because of its porous structure and abundant functional groups. Environmental acidification was caused by degrading bacteria Arthrobacter sp. JQ-1 (JQ-1) respiration and acidic metabolites during DEHP degradation, which affected the passage life of microorganisms and the removal efficiency of DEHP. The mechanism of DEHP degradation by the combined action of JQ-1 and corn straw biochar (BC) at 600 °C was investigated, and bacterial viability, microenvironmental changes, and kinetic tests were performed in this research. Compared with biodegradation group alone, the degradation rate of DEHP in 1% biochar unloaded and loaded with JQ-1 increased by 18.3% and 30.9%, and its half-life decreased to 23.90 h and 11.95h, a reduction of 31.37 h. The percentage of detected living JQ-1 increased as biochar content increased when loading capacity was less than 1%. In which, (JQ-1-BC2) group was 4.1% higher than (JQ-1-BC1) group. Biochar has the ability to neutralize acidifying environmental pH due to its alkaline functional groups, including lactone group, -OH, -COO-. 1% biochar loaded with JQ-1 increased the pH of the microenvironment by 0.57 and alkaline phosphatase (AKP) activity by 0.0063 U·mL-1, which promoted the reduction of PA. Study suggested that biochar loaded with JQ-1 could simultaneously adsorb and degrade DEHP during the process of DEHP removal. Biochar could be used as a biological stimulant to increase abundance and metabolism, enhance the utilization of DEHP by JQ-1. Biochar (1% (w/v)) loaded with JQ-1 as DEHP removal material showed good performance. Biochar not only as an immobilized carrier, but also as a biostimulant, providing an effective strategy for the collaborative remediation of PAEs contaminated.
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Affiliation(s)
- Rui Guan
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Lei Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Ying Zhao
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Fuxin Huang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Ying Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Xiaodong Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Yuxin Chen
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Mingze Li
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Didi Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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15
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Liu T, Ning L, Mei C, Li S, Zheng L, Qiao P, Wang H, Hu T, Zhong W. Synthetic bacterial consortia enhanced the degradation of mixed priority phthalate ester pollutants. ENVIRONMENTAL RESEARCH 2023; 235:116666. [PMID: 37453507 DOI: 10.1016/j.envres.2023.116666] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 07/11/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
Dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), butyl benzyl phthalate (BBP), bis(2-ethylhexyl) phthalate (DEHP), and di-n-octyl phthalate (DOP) are hazardous chemicals listed as priority pollutants that disrupt endocrine systems. According to available reports, these six priority phthalate esters (PAEs) are considered the most polluting; however, no studies have been conducted on the efficient remediation of these PAEs. We therefore designed and constructed a synthetic bacterial consortium capable of the simultaneous and efficient degradation of six priority PAEs in minimal inorganic salt medium (MSM) and soil. The consortium comprised Glutamicibacter sp. ZJUTW, which demonstrates priority for degrading short-chain PAEs; Cupriavidus sp. LH1, which degrades phthalic acid (PA) and protocatechuic acid (PCA), intermediates of the PAE biodegradation process; and Gordonia sp. GZ-YC7, which efficiently degrades long-chain priority PAEs, including DEHP and DOP. In MSM containing the six mixed PAEs (250 mg/L each), the ZJUTW + YC + LH1 consortium completely degraded the four short-chain PAEs within 48 h, and DEHP (100%) and DOP (62.5%) within 72 h. In soil containing the six mixed PAEs (DMP, DEP, BBP, and DOP, 400 mg/kg each; DBP and DEHP, 500 mg/kg, each), the ZJUTW + YC + LH1 consortium completely degraded DMP, DEP, BBP, and DBP within 6 days, and 70.84% of DEHP and 66.24% of DOP within 2 weeks. The consortium efficiently degraded the six mixed PAEs in both MSM and soil. We thus believe that this synthetic microbial consortium is a strong candidate for the bioremediation of environments contaminated with mixed PAE pollutants.
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Affiliation(s)
- Tengfei Liu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, China
| | - Lixiao Ning
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, China
| | - Chengyu Mei
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, China
| | - Shuang Li
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, China
| | - Lianbao Zheng
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, China
| | - Pei Qiao
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, China
| | - Haixia Wang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, China
| | - Tong Hu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, China
| | - Weihong Zhong
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, China.
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16
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Fan S, Guo J, Han S, Du H, Wang Z, Fu Y, Han H, Hou X, Wang W. A Novel and Efficient Phthalate Hydrolase from Acinetobacter sp. LUNF3: Molecular Cloning, Characterization and Catalytic Mechanism. Molecules 2023; 28:6738. [PMID: 37764514 PMCID: PMC10537300 DOI: 10.3390/molecules28186738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/14/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023] Open
Abstract
Phthalic acid esters (PAEs), which are widespread environmental contaminants, can be efficiently biodegraded, mediated by enzymes such as hydrolases. Despite great advances in the characterization of PAE hydrolases, which are the most important enzymes in the process of PAE degradation, their molecular catalytic mechanism has rarely been systematically investigated. Acinetobacter sp. LUNF3, which was isolated from contaminated soil in this study, demonstrated excellent PAE degradation at 30 °C and pH 5.0-11.0. After sequencing and annotating the complete genome, the gene dphAN1, encoding a novel putative PAE hydrolase, was identified with the conserved motifs catalytic triad (Ser201-Asp295-His325) and oxyanion hole (H127GGG130). DphAN1 can hydrolyze DEP (diethyl phthalate), DBP (dibutyl phthalate) and BBP (benzyl butyl phthalate). The high activity of DphAN1 was observed under a wide range of temperature (10-40 °C) and pH (6.0-9.0). Moreover, the metal ions (Fe2+, Mn2+, Cr2+ and Fe3+) and surfactant TritonX-100 significantly activated DphAN1, indicating a high adaptability and tolerance of DphAN1 to these chemicals. Molecular docking revealed the catalytic triad, oxyanion hole and other residues involved in binding DBP. The mutation of these residues reduced the activity of DphAN1, confirming their interaction with DBP. These results shed light on the catalytic mechanism of DphAN1 and may contribute to protein structural modification to improve catalytic efficiency in environment remediation.
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Affiliation(s)
- Shuanghu Fan
- College of Life Science, Langfang Normal University, Langfang 065000, China; (S.F.); (S.H.); (H.D.); (Z.W.); (Y.F.); (H.H.)
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
- Technical Innovation Center for Utilization of Edible and Medicinal Fungi in Hebei Province, Langfang 065000, China
| | - Jingjing Guo
- School of Chemistry and Materials Science, Langfang Normal University, Langfang 065000, China;
| | - Shaoyan Han
- College of Life Science, Langfang Normal University, Langfang 065000, China; (S.F.); (S.H.); (H.D.); (Z.W.); (Y.F.); (H.H.)
| | - Haina Du
- College of Life Science, Langfang Normal University, Langfang 065000, China; (S.F.); (S.H.); (H.D.); (Z.W.); (Y.F.); (H.H.)
| | - Zimeng Wang
- College of Life Science, Langfang Normal University, Langfang 065000, China; (S.F.); (S.H.); (H.D.); (Z.W.); (Y.F.); (H.H.)
| | - Yajuan Fu
- College of Life Science, Langfang Normal University, Langfang 065000, China; (S.F.); (S.H.); (H.D.); (Z.W.); (Y.F.); (H.H.)
- Technical Innovation Center for Utilization of Edible and Medicinal Fungi in Hebei Province, Langfang 065000, China
| | - Hui Han
- College of Life Science, Langfang Normal University, Langfang 065000, China; (S.F.); (S.H.); (H.D.); (Z.W.); (Y.F.); (H.H.)
- Technical Innovation Center for Utilization of Edible and Medicinal Fungi in Hebei Province, Langfang 065000, China
| | - Xiaoqiang Hou
- College of Life Science, Langfang Normal University, Langfang 065000, China; (S.F.); (S.H.); (H.D.); (Z.W.); (Y.F.); (H.H.)
- Technical Innovation Center for Utilization of Edible and Medicinal Fungi in Hebei Province, Langfang 065000, China
| | - Weixuan Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
- National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya 572024, China
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17
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Hou D, Zhang L, Li C, Chen L, Zou J. Enhancing the Mn-Removal Efficiency of Acid-Mine Bacterial Consortium: Performance Optimization and Mechanism Study. Microorganisms 2023; 11:2185. [PMID: 37764029 PMCID: PMC10535970 DOI: 10.3390/microorganisms11092185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/21/2023] [Accepted: 08/28/2023] [Indexed: 09/29/2023] Open
Abstract
In this study, an acclimated manganese-oxidizing bacteria (MnOB) consortium, QBS-1, was enriched in an acid mine area; then, it was used to eliminate Mn(Ⅱ) in different types of wastewater. QBS-1 presented excellent Mn removal performance between pH 4.0 and 8.0, and the best Mn-removal efficiency was up to 99.86% after response surface methodology optimization. Unlike other MnOB consortia, the core bacteria of QBS-1 were Stenotrophomonas and Achromobacter, which might play vital roles in Mn removal. Besides that, adsorption, co-precipitation and electrostatic binding by biological manganese oxides could further promote Mn elimination. Finally, the performance of the Mn biofilter demonstrated that QBS-1 was an excellent inoculant, which indicates good potential for removing Mn contamination steadily and efficiently.
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Affiliation(s)
- Dongmei Hou
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China; (L.Z.); (C.L.); (L.C.)
| | | | | | | | - Jianping Zou
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China; (L.Z.); (C.L.); (L.C.)
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18
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Ren L, Weng L, Chen D, Hu H, Jia Y, Zhou JL. Bioremediation of PAEs-contaminated saline soil: The application of a marine bacterial strain isolated from mangrove sediment. MARINE POLLUTION BULLETIN 2023; 192:115071. [PMID: 37236097 DOI: 10.1016/j.marpolbul.2023.115071] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 04/10/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023]
Abstract
Phthalic acid esters (PAEs) are known as the most widely used plasticizer as well as one of the ubiquitously distributed emerging pollutants. Biodegradation and bioremediation via application of PAEs-degrading microbes is promising. In this study, a novel marine microbe, Gordonia hongkongensis RL-LY01, was isolated from mangrove sediment showing high di-(2-ethylhexyl) phthalate (DEHP) degradation capacity. Strain RL-LY01 could degrade a wide range of PAEs and the degradation kinetics of DEHP followed the first-order decay model. Meanwhile, good environmental adaptability, preference to alkaline conditions and good tolerance to salinity and metal ions was shown. Further, metabolic pathway of DEHP in strain RL-LY01 was proposed, with di-ethyl phthalate, phthalic acid, benzoic acid and catechol as intermediates. Additionally, one known mono-alkyl phthalate hydrolase gene (mehpH) was identified. Finally, the excellent performance during bioremediation of artificial DEHP-contaminated saline soil and sediment indicated strain RL-LY01 employs great application potential for the bioremediation of PAE-contaminated environments.
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Affiliation(s)
- Lei Ren
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Liyun Weng
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Danni Chen
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Hanqiao Hu
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Yang Jia
- National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Zhejiang Provincial Key Lab for Subtropical Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou 325035, China.
| | - John L Zhou
- Centre for Green Technology, University of Technology Sydney, 15 Broadway, NSW 2007, Australia
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Bhattacharyya M, Dhar R, Basu S, Das A, Reynolds DM, Dutta TK. Molecular evaluation of the metabolism of estrogenic di(2-ethylhexyl) phthalate in Mycolicibacterium sp. Microb Cell Fact 2023; 22:82. [PMID: 37101185 PMCID: PMC10134610 DOI: 10.1186/s12934-023-02096-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 04/12/2023] [Indexed: 04/28/2023] Open
Abstract
BACKGROUND Di(2-ethylhexyl) phthalate (DEHP) is a widely detected plasticizer and a priority pollutant of utmost concern for its adverse impact on humans, wildlife and the environment. To eliminate such toxic burden, biological processes are the most promising ways to combat rampant environmental insults under eco-friendly conditions. The present study investigated the biochemical and molecular assessment of the catabolic potential of Mycolicibacterium sp. strain MBM in the assimilation of estrogenic DEHP. RESULTS A detailed biochemical study revealed an initial hydrolytic pathway of degradation for DEHP followed by the assimilation of hydrolyzed phthalic acid and 2-ethylhexanol to TCA cycle intermediates. Besides the inducible nature of DEHP-catabolic enzymes, strain MBM can efficiently utilize various low- and high-molecular-weight phthalate diesters and can grow under moderately halotolerant conditions. Whole genome sequence analysis exhibited a genome size of 6.2 Mb with a GC content of 66.51% containing 6,878 coding sequences, including multiple genes, annotated as relevant to the catabolism of phthalic acid esters (PAEs). Substantiating the annotated genes through transcriptome assessment followed by RT-qPCR analysis, the possible roles of upregulated genes/gene clusters in the metabolism of DEHP were revealed, reinforcing the biochemical pathway of degradation at the molecular level. CONCLUSIONS A detailed co-relation of biochemical, genomic, transcriptomic and RT-qPCR analyses highlights the PAE-degrading catabolic machineries in strain MBM. Further, due to functional attributes in the salinity range of both freshwater and seawater, strain MBM may find use as a suitable candidate in the bioremediation of PAEs.
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Affiliation(s)
- Mousumi Bhattacharyya
- Department of Microbiology, Bose Institute, EN-80, Sector V, Salt Lake, Kolkata, West Bengal, 700091, India
| | - Rinita Dhar
- Department of Microbiology, Bose Institute, EN-80, Sector V, Salt Lake, Kolkata, West Bengal, 700091, India
| | - Suman Basu
- Department of Microbiology, Bose Institute, EN-80, Sector V, Salt Lake, Kolkata, West Bengal, 700091, India
| | - Avijit Das
- Department of Microbiology, Bose Institute, EN-80, Sector V, Salt Lake, Kolkata, West Bengal, 700091, India
| | - Darren M Reynolds
- Centre for Research in Biosciences, Department of Applied Sciences, University of the West of England, Bristol, BS16 1QY, UK
| | - Tapan K Dutta
- Department of Microbiology, Bose Institute, EN-80, Sector V, Salt Lake, Kolkata, West Bengal, 700091, India.
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20
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Tran HT, Lin C, Lam SS, Le TH, Hoang HG, Bui XT, Rene ER, Chen PH. Biodegradation of high di-(2-Ethylhexyl) phthalate (DEHP) concentration by food waste composting and its toxicity assessment using seed germination test. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120640. [PMID: 36403881 DOI: 10.1016/j.envpol.2022.120640] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 10/15/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
Di-(2-ethylhexyl) phthalate (DEHP), a plasticizer derived from phthalate ester, is used as an additive in industrial products such as plastics, paints, and medical devices. However, DEHP is known as an endocrine-disrupting chemical, causing cancers and adverse effects on human health. This study evaluated DEHP biodegradation efficiency via food waste composting during 35 days of incubation. At high DEHP concentrations (2167 mg kg-1) in food waste compost mixture, the DEHP biodegradation efficiency was 99% after 35 days. The highest degradation efficiency was recorded at the thermophilic phase (day 3 - day 11) with the biodegradation rate reached 187 mg kg-1 day-1. DEHP was metabolized to dibutyl phthalate (DBP) and dimethyl phthalate (DMP) and would be oxidized to benzyl alcohol (BA) and mineralized into CO2 and water via various metabolisms. Finally, the compost's quality with residual DEHP was evaluated using Brassica chinensis L. seeds via 96 h of germination tests. The compost (at day 35) with a trace amount of DEHP as the end product showed no significant effect on the germination rate of Brassica chinensis L. seeds (88%) compared to that without DEHP (94%), indicating that the compost can be reused as fertilizer in agricultural applications. These results provide an improved understanding of the DEHP biodegradation via food waste composting without bioaugmentation and hence facilitating its green remediation and conversion into value-added products. Nevertheless, further studies are needed on DEHP biodegradation in large-scale food waste composting or industrial applications.
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Affiliation(s)
- Huu-Tuan Tran
- Laboratory of Ecology and Environmental Management, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, 700000, Viet Nam; Faculty of Applied Technology, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, 700000, Viet Nam
| | - Chitsan Lin
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan.
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Henan Province Engineering Research Center for Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Thi Hieu Le
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan
| | - Hong-Giang Hoang
- Faculty of Medicine, Dong Nai Technology University, Bien Hoa, Dong Nai, 76100, Vietnam
| | - Xuan-Thanh Bui
- Key Laboratory of Advanced Waste Treatment Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University Ho Chi Minh (VNU-HCM), Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Vietnam
| | - Eldon R Rene
- Department of Water Supply, Sanitation and Environmental Engineering, IHE Delft Institute for Water Education, Westvest 7, P. O. Box 3015, 2601DA, Delft, the Netherlands
| | - Po Han Chen
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan
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21
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Liu A, Wang W, Chen X, Zheng X, Fu W, Wang G, Ji J, Guan C. Phytoremediation of DEHP and heavy metals co-contaminated soil by rice assisted with a PGPR consortium: Insights into the regulation of ion homeostasis, improvement of photosynthesis and enrichment of beneficial bacteria in rhizosphere soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 314:120303. [PMID: 36181940 DOI: 10.1016/j.envpol.2022.120303] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/20/2022] [Accepted: 09/25/2022] [Indexed: 06/16/2023]
Abstract
The coexistence of di (2-ethylhexyl) phthalate (DEHP), Cd, and Zn poses a serious challenge to soil ecosystems. This study aimed to evaluate the phytoremediation potential of rice assisted with a plant growth promoting rhizobacteria (PGPR) consortium for the remediation of DEHP, Cd, and Zn co-contaminated soil. The consortium consisted of four bacterial strains, all of which exhibited Cd-Zn resistance and DEHP degradability. The results showed that the rice assisted by the bacterial consortium dissipated 86.1% DEHP while removing 76.0% Cd2+ and 92.2% Zn2+ from soil within 30 d. The presence of the PGPR consortium promoted plant growth and improved soil enzymatic activity, which may have helped enhance the removal of DEHP and heavy metals from the soil. Moreover, the application of the consortium modified the bacterial community and increased the relative abundance of bacteria related to DEHP degradation (Sphingomonas, Xanthobacteraceae), heavy metal immobilization (Massilia), and soil nutrient cycling (Nitrospira, Vicinamibacterales), which promoted plant growth and the removal of DEHP and heavy metals from soil. Notably, the DEHP and heavy metal contents in rice decreased substantially during the phytoremediation process. Therefore, the PGPR consortium could be beneficial for enhancing the removal of DEHP and heavy metals from the soil, without inducing the accumulation of these pollutants in rice. In general, this study confirmed that the combined use of rice and the PGPR consortium could remedy DEHP and heavy metal co-contaminated soil economically and ecologically without simultaneously posing risks for rice consumption.
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Affiliation(s)
- Anran Liu
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Wenjing Wang
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Xiancao Chen
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Xiaoyan Zheng
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Wenting Fu
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Gang Wang
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Jing Ji
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Chunfeng Guan
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China.
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22
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Wang L, Gan D, Gong L, Zhang Y, Wang J, Guan R, Zeng L, Qu J, Dong M, Wang L. Analysis of the performance of the efficient di-(2-ethylhexyl) phthalate-degrading bacterium Rhodococcus pyridinovorans DNHP-S2 and associated catabolic pathways. CHEMOSPHERE 2022; 306:135610. [PMID: 35810862 DOI: 10.1016/j.chemosphere.2022.135610] [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: 01/29/2022] [Revised: 06/17/2022] [Accepted: 07/03/2022] [Indexed: 05/12/2023]
Abstract
The widespread use of plastic has led to the global occurrence of phthalate esters (PAEs) pollution. PAEs can be effectively removed from polluted environments by microbe-mediated degradation. Di-(2-ethylhexyl) phthalate (DEHP) has the highest residual concentration in agricultural soil-contaminated areas compared to other PAEs in most of China. The Rhodococcus pyridinovorans DNHP-S2 microbial isolate identified was found to efficiently degrade DEHP. Within a 72 h period, the bacteria were able to degrade 52.47% and 99.75% of 500 mg L-1 DEHP at 10 °C and 35 °C, respectively. Dimethyl phthalate (DMP) was first identified as an intermediate metabolite of DEHP, which is different from the previously reported DEHP catabolic pathway. Genomic sequencing of DNHP-S2 identified benzoate 1,2-dioxygenase and catechol 2,3/1,2-dioxygenase as potential mediators of DEHP degradation, consistent with the existence of two downstream metabolic pathways governing DEHP degradation. Three targets DEHP metabolism-related enzymes were found to be DEHP-inducible at the mRNA level, and DNHP-S2 was able to mediate the complete degradation of DEHP at lower temperatures, as confirmed via RT-qPCR. DNHP-S2 was also found to readily break down other PAEs including DMP, di-n-butyl phthalate (DBP), di-n-octyl phthalate (DnOP), and n-butyl benzyl phthalate (BBP). Together, these results thus highlight DNHP-S2 as a bacterial strain with great promise as a tool for the remediation of PAE pollution. In addition to providing new germplasm and genetic resources for use in the context of PAE degradation, these results also offer new insight into the potential mechanisms whereby PAEs undergo catabolic degradation, making them well-suited for use in PAE-contaminated environments.
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Affiliation(s)
- Lei Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Deping Gan
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Li Gong
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Ying Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Jingyi Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Rui Guan
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Lingling Zeng
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Jianhua Qu
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Maofeng Dong
- Pesticide Safety Evaluation Research Center, Shanghai Academy of Agricultural Sciences, 2901 Beizhai Road, Minhang District, Shanghai, People's Republic of China
| | - Lei Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China
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23
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Tran HT, Nguyen MK, Hoang HG, Hutchison JM, Vu CT. Composting and green technologies for remediation of phthalate (PAE)-contaminated soil: Current status and future perspectives. CHEMOSPHERE 2022; 307:135989. [PMID: 35988768 PMCID: PMC10052775 DOI: 10.1016/j.chemosphere.2022.135989] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 08/05/2022] [Accepted: 08/06/2022] [Indexed: 05/29/2023]
Abstract
Phthalate esters (PAEs) are hazardous organic compounds that are widely added to plastics to enhance their flexibility, temperature, and acidic tolerance. The increase in global consumption and the corresponding environmental pollution of PAEs has caused broad public concerns. As most PAEs accumulate in soil due to their high hydrophobicity, composting is a robust remediation technology for PAE-contaminated soil (efficiency 25%-100%), where microbial activity plays an important role. This review summarized the roles of the microbial community, biodegradation pathways, and specific enzymes involved in the PAE degradation. Also, other green technologies, including biochar adsorption, bioaugmentation, and phytoremediation, for PAE degradation were also presented, compared, and discussed. Composting combined with these technologies significantly enhanced removal efficiency; yet, the properties and roles of each bacterial strain in the degradation, upscaling, and economic feasibility should be clarified in future research.
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Affiliation(s)
- Huu-Tuan Tran
- Civil, Environmental, and Architectural Engineering Department, University of Kansas, Lawrence, KS, 66045, USA.
| | - Minh-Ky Nguyen
- Program in Maritime Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Faculty of Environment and Natural Resources, Nong Lam University of Ho Chi Minh City, Hamlet 6, Linh Trung Ward, Thu Duc Dist., Ho Chi Minh City 700000, Viet Nam
| | - Hong-Giang Hoang
- Faculty of Medicine, Dong Nai Technology University, Bien Hoa, Dong Nai 76100, Viet Nam
| | - Justin M Hutchison
- Civil, Environmental, and Architectural Engineering Department, University of Kansas, Lawrence, KS, 66045, USA
| | - Chi Thanh Vu
- Civil and Environmental Engineering Department, University of Alabama in Huntsville, Huntsville, AL 35899, USA
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24
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Mondal T, Mondal S, Ghosh SK, Pal P, Soren T, Pandey S, Maiti TK. Phthalates - A family of plasticizers, their health risks, phytotoxic effects, and microbial bioaugmentation approaches. ENVIRONMENTAL RESEARCH 2022; 214:114059. [PMID: 35961545 DOI: 10.1016/j.envres.2022.114059] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/18/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Phthalates are a family of reprotoxicant compounds, predominantly used as a plasticizer to improve the flexibility and longevity of consumable plastic goods. After their use these plastic products find their way to the waste disposal sites where they leach out the hazardous phthalates present within them, into the surrounding environment, contaminating soil, groundwater resources, and the nearby water bodies. Subsequently, phthalates move into the living system through the food chain and exhibit the well-known phenomenon of biological magnification. Phthalates as a primary pollutant have been classified as 1B reprotoxicants and teratogens by different government authorities and they have thus imposed restrictions on their use. Nevertheless, the release of these compounds in the environment is unabated. Bioremediation has been suggested as one of the ways of mitigating this menace, but studies regarding the field applications of phthalate utilizing microbes for this purpose are limited. Through this review, we endeavor to make a deeper understanding of the cause and concern of the problem and to find out a possible solution to it. The review critically emphasizes the various aspects of phthalates toxicity, including their chemical nature, human health risks, phytoaccumulation and entry into the food chain, microbial role in phthalate degradation processes, and future challenges.
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Affiliation(s)
- Tanushree Mondal
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Golapbag, Purba Bardhaman, P. O. -Rajbati, 713104, West Bengal, India.
| | - Sayanta Mondal
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Golapbag, Purba Bardhaman, P. O. -Rajbati, 713104, West Bengal, India.
| | - Sudip Kumar Ghosh
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Golapbag, Purba Bardhaman, P. O. -Rajbati, 713104, West Bengal, India.
| | - Priyanka Pal
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Golapbag, Purba Bardhaman, P. O. -Rajbati, 713104, West Bengal, India.
| | - Tithi Soren
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Golapbag, Purba Bardhaman, P. O. -Rajbati, 713104, West Bengal, India.
| | - Sanjeev Pandey
- Department of Botany, Banwarilal Bhalotia College, Asansol, 713303, West Bengal, India.
| | - Tushar Kanti Maiti
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Golapbag, Purba Bardhaman, P. O. -Rajbati, 713104, West Bengal, India.
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25
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Miral A, Kautsky A, Alves-Carvalho S, Cottret L, Guillerm-Erckelboudt AY, Buguet M, Rouaud I, Tranchimand S, Tomasi S, Bartoli C. Rhizocarpon geographicum Lichen Discloses a Highly Diversified Microbiota Carrying Antibiotic Resistance and Persistent Organic Pollutant Tolerance. Microorganisms 2022; 10:1859. [PMID: 36144461 PMCID: PMC9503503 DOI: 10.3390/microorganisms10091859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/06/2022] [Accepted: 09/14/2022] [Indexed: 11/16/2022] Open
Abstract
As rock inhabitants, lichens are exposed to extreme and fluctuating abiotic conditions associated with poor sources of nutriments. These extreme conditions confer to lichens the unique ability to develop protective mechanisms. Consequently, lichen-associated microbes disclose highly versatile lifestyles and ecological plasticity, enabling them to withstand extreme environments. Because of their ability to grow in poor and extreme habitats, bacteria associated with lichens can tolerate a wide range of pollutants, and they are known to produce antimicrobial compounds. In addition, lichen-associated bacteria have been described to harbor ecological functions crucial for the evolution of the lichen holobiont. Nevertheless, the ecological features of lichen-associated microbes are still underestimated. To explore the untapped ecological diversity of lichen-associated bacteria, we adopted a novel culturomic approach on the crustose lichen Rhizocarpon geographicum. We sampled R. geographicum in French habitats exposed to oil spills, and we combined nine culturing methods with 16S rRNA sequencing to capture the greatest bacterial diversity. A deep functional analysis of the lichen-associated bacterial collection showed the presence of a set of bacterial strains resistant to a wide range of antibiotics and displaying tolerance to Persistent Organic Pollutants (POPs). Our study is a starting point to explore the ecological features of the lichen microbiota.
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Affiliation(s)
- Alice Miral
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226, University of Rennes 1, 35000 Rennes, France
| | - Adam Kautsky
- IGEPP, INRAE, Institut Agro, University of Rennes 1, LIPME, INRAE, 35653 Le Rheu, France
| | - Susete Alves-Carvalho
- IGEPP, INRAE, Institut Agro, University of Rennes 1, LIPME, INRAE, 35653 Le Rheu, France
| | - Ludovic Cottret
- CNRS, Université de Toulouse, 31320 Castanet-Tolosan, France
| | | | - Manon Buguet
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226, University of Rennes 1, 35000 Rennes, France
| | - Isabelle Rouaud
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226, University of Rennes 1, 35000 Rennes, France
| | - Sylvain Tranchimand
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226, University of Rennes 1, 35000 Rennes, France
| | - Sophie Tomasi
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226, University of Rennes 1, 35000 Rennes, France
| | - Claudia Bartoli
- IGEPP, INRAE, Institut Agro, University of Rennes 1, LIPME, INRAE, 35653 Le Rheu, France
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Lv L, Qiu K, Ge S, Jiao Z, Gao C, Fu H, Su R, Liu Z, Wang Y, Wang Y. Neutralization and Improvement of Bauxite Residue by Saline-Alkali Tolerant Bacteria. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11590. [PMID: 36141868 PMCID: PMC9517105 DOI: 10.3390/ijerph191811590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 06/16/2023]
Abstract
The high salt-alkalinity of bauxite residue (BR) hinders plant growth and revegetation of bauxite residue disposal areas (BRDA), which cause serious potential environmental and ecological risks. Bioneutralization is a promising method for improving the properties of BR and plant colonization. In the present study, a strong saline-alkali tolerant bacteria (ZH-1) was isolated from aged BR and identified as Bacillus sp. The medium of ZH-1 was optimized by orthogonal tests, and ZH-1 could decrease the medium pH from 11.8 to 6.01 (agitated culture) and 6.48 (static culture) by secretion of citric acid, oxalic acid and tartaric acid. With the inoculation of ZH-1, the pH of BR decreased from 11.6 to 8.76, and the water-soluble salt in BR increased by 68.11%. ZH-1 also changed the aggregate size distribution of BR, the mechanical-stable aggregates and water-stable aggregates increased by 18.76% and 10.83%, respectively. At the same time, the stability of the aggregates obviously increased and the destruction rate decreased from 94.37% to 73.46%. In addition, the microbial biomass carbon increased from 425 to 2794 mg/kg with the inoculation of ZH-1. Bacterial community analysis revealed that Clostridia, Bacilli, Gammaproteobacteria, Betaproteobacteria and Alphaproteobacteria were the main classes in the naturalized BR, and the inoculation of ZH-1 increased the diversity of bacteria in the BR. Overall, ZH-1 has great potential for neutralization and improvement the properties of BR and may be greatly beneficial for the revegetation of BRDA.
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Affiliation(s)
- Lv Lv
- National Demonstration Center for Environmental and Planning, College of Geography and Environmental Science, Henan University, Kaifeng 475004, China
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Henan University, Ministry of Education, Kaifeng 475004, China
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng 475004, China
| | - Kunyan Qiu
- Henan Key Laboratory for Monitoring and Remediation in Heavy Metal Polluted Soil, Jiyuan 459000, China
| | - Shiji Ge
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng 475004, China
| | - Zhiqiang Jiao
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng 475004, China
| | - Chenyang Gao
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng 475004, China
| | - Haiguang Fu
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng 475004, China
| | - Rongkui Su
- School of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Zhongkai Liu
- Zhengzhou Non-Ferrous Metals Research Institute Co., Ltd. of CHALCO, Zhengzhou 450041, China
| | - Yulong Wang
- National Demonstration Center for Environmental and Planning, College of Geography and Environmental Science, Henan University, Kaifeng 475004, China
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Henan University, Ministry of Education, Kaifeng 475004, China
| | - Yangyang Wang
- National Demonstration Center for Environmental and Planning, College of Geography and Environmental Science, Henan University, Kaifeng 475004, China
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng 475004, China
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27
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Wang Y, Ren Q, Zhan W, Zheng K, Liao Q, Yang Z, Wang Y, Ruan X. Biodegradation of di-n-octyl phthalate by Gordonia sp. Lff and its application in soil. ENVIRONMENTAL TECHNOLOGY 2022; 43:2604-2611. [PMID: 33577396 DOI: 10.1080/09593330.2021.1890839] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 02/06/2021] [Indexed: 06/12/2023]
Abstract
A previous isolated Gordonia sp. (Lff) was used to degrade di-n-octyl phthalate (DOP) contamination in both aqueous solution and soil. The influence of temperature, pH, inoculum size, salt content and initial concentration of DOP on DOP degradation by Lff were analysed. The response of soil bacterial community to DOP and Lff was also analysed by Illumina MiSeq sequence method. Results showed that the optimal temperature, pH, inoculum size and salt content were 35oC, 8.0, 5% and <5%, respectively. Under the optimal condition, more than 91.25% of DOP with different initial concentrations (100-2000 mg/L) could be degraded by Lff. Kinetics analysis indicated that biodegradation of DOP by Lff could be described by first-order kinetics (R2 > 0.917) with the half-life (t1/2) changing irregularly between 0.58 and 0.83 d. In addition, Lff enhanced the removal of DOP in soil and alleviated the toxicity of DOP on soil microorganisms. Furthermore, its influence on soil bacterial community is not obvious. These results suggested that Lff was effective in remediating DOP contamination in different environments.
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Affiliation(s)
- Yangyang Wang
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng, People's Republic of China
| | - Qiang Ren
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng, People's Republic of China
| | - Wenhao Zhan
- National Key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing, People's Republic of China
| | - Kaixuan Zheng
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng, People's Republic of China
| | - Qi Liao
- School of Metallurgical & Environment, Central South University, Changsha, People's Republic of China
| | - Zhihui Yang
- School of Metallurgical & Environment, Central South University, Changsha, People's Republic of China
| | - Yansong Wang
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
| | - Xinling Ruan
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng, People's Republic of China
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Phthalate Esters Metabolic Strain Gordonia sp. GZ-YC7, a Potential Soil Degrader for High Concentration Di-(2-ethylhexyl) Phthalate. Microorganisms 2022; 10:microorganisms10030641. [PMID: 35336217 PMCID: PMC8955600 DOI: 10.3390/microorganisms10030641] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 03/12/2022] [Accepted: 03/15/2022] [Indexed: 02/01/2023] Open
Abstract
As commonly used chemical plasticizers in plastic products, phthalate esters have become a serious ubiquitous environmental pollutant, such as in soil of plastic film mulch culture. Microbial degradation or transformation was regarded as a suitable strategy to solve the phthalate esters pollution. Thus, a new phthalate esters degrading strain Gordonia sp. GZ-YC7 was isolated in this study, which exhibited the highest di-(2-ethylhexyl) phthalate degradation efficiency under 1000 mg/L and the strongest tolerance to 4000 mg/L. The comparative genomic analysis results showed that there exist diverse esterases for various phthalate esters such as di-(2-ethylhexyl) phthalate and dibutyl phthalate in Gordonia sp. GZ-YC7. This genome characteristic possibly contributes to its broad substrate spectrum, high degrading efficiency, and high tolerance to phthalate esters. Gordonia sp. GZ-YC7 has potential for the bioremediation of phthalate esters in polluted soil environments.
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Wang J, He M, Zeng H, Liu W, Luo X, Ma Y, Chen Z, Jin X. A cytotoxic triterpenoid from a Periplaneta americana-derived, Gordonia hongkongensis WA12-1-1. FEMS Microbiol Lett 2022; 369:6895546. [PMID: 36513328 DOI: 10.1093/femsle/fnac121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 10/14/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022] Open
Abstract
The secondary metabolites produced by microorganisms are a source of novel compounds with antitumor activities. In this study, we isolated biologically active secondary metabolites produced by microorganisms in the intestinal tract of Periplaneta americana. Based on the 16S rRNA gene sequencing, Gordonia hongkongensis WA12-1-1 was identified as the main microorganisms in the intestinal tract of P. americana. The obtained sequence was deposited in the National Center for Biotechnology Information (NCBI) database under the accession number MZ348554. The isolated secondary metabolites were separated and purified by thin layer chromatography, silica gel column chromatography, Sephadex column chromatography, open octadecyl silane column chromatography, high-performance liquid chromatography (HPLC), and semipreparative HPLC. Next, the structure of individual compounds was determined by ultraviolet spectroscopy, nuclear magnetic resonance, and mass spectrometry. A total of 20 compounds were isolated from the secondary metabolites produced by G. hongkongensis WA12-1-1. A total of 12 compounds were obtained from the crude ethyl acetate extract of the culture supernatant and eight from the cellular fraction. Compound 1 was identified as a triterpenoid named gordonterpene and showed cytotoxicity against A549 and HepG2 cell lines. These findings form a basis for further studies on the bioactivity of gordonterpene to tumor cells.
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Affiliation(s)
- Jie Wang
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, 280 Wai Huan Dong Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Guangzhou Higher Education Mega Center, 280 Wai Huan Dong Road, Guangzhou, 510006, China
| | - Mengying He
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, 280 Wai Huan Dong Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Guangzhou Higher Education Mega Center, 280 Wai Huan Dong Road, Guangzhou, 510006, China
| | - Huanxiong Zeng
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, 280 Wai Huan Dong Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Guangzhou Higher Education Mega Center, 280 Wai Huan Dong Road, Guangzhou, 510006, China.,Zhongshan Ophthalmic Center, Sun Yat-sen University, No 54, Xianlie South Road, Yuexiu District, Guangzhou, 510006, China
| | - Wenbin Liu
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, 280 Wai Huan Dong Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Guangzhou Higher Education Mega Center, 280 Wai Huan Dong Road, Guangzhou, 510006, China
| | - Xiongming Luo
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, 280 Wai Huan Dong Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Guangzhou Higher Education Mega Center, 280 Wai Huan Dong Road, Guangzhou, 510006, China
| | - Yan Ma
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, 280 Wai Huan Dong Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Guangzhou Higher Education Mega Center, 280 Wai Huan Dong Road, Guangzhou, 510006, China
| | - Zhiyu Chen
- Bionic Sensing and Intelligence Center, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Avenue, Xili University Town, Nanshan District, Shenzhen, 518055, China.,University of Chinese Academy of Sciences, No.19A, Yuquan Road, Shijingshan District, Beijing, 100049, China
| | - Xiaobao Jin
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, 280 Wai Huan Dong Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Guangzhou Higher Education Mega Center, 280 Wai Huan Dong Road, Guangzhou, 510006, China
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30
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Zhu Q, Xu L, Wang W, Liu W, Liao C, Jiang G. Occurrence, spatial distribution and ecological risk assessment of phthalate esters in water, soil and sediment from Yangtze River Delta, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150966. [PMID: 34656589 DOI: 10.1016/j.scitotenv.2021.150966] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/03/2021] [Accepted: 10/09/2021] [Indexed: 06/13/2023]
Abstract
A total of 96 water, soil, and sediment samples, collected from 32 sampling sites in the Yangtze River Delta (YRD) region, were analyzed for 9 phthalate esters (PAEs). The sum concentrations of 9 PAEs (∑9PAEs) in the water, soil, and sediment samples were 2.23-6.30 μg L-1 (mean: 4.11 μg L-1), 155-1410 μg kg-1 (408 μg kg-1), and 30.1-16,000 μg kg-1 (1200 μg kg-1), respectively. Among the 9 PAEs, di-n-butyl phthalate (DBP), bis(2-ethylhexyl) phthalate (DEHP), and di-isobutyl phthalate (DIBP) are the predominant congeners in the YRD region. DBP was the dominant PAE congener in water, accounting for 50.6% of the Σ9PAEs, while DEHP was the predominant one in soil and sediment (accounting for 69.6% and 83.1% of the Σ9PAEs, respectively). Soil and sediment samples collected from Wuxi city manifested relatively higher PAE concentrations. The partitioning of PAEs between water and sediment was attributed to the fact that low molecular weight PAEs (e.g., dimethyl phthalate (DMP) and diethyl phthalate (DEP)) were dominant in water, medium molecular weight PAEs (e.g., BzBP) were close to the equilibrium between sediment-water, and high molecular weight PAEs (e.g., DEHP) were more prevalent in sediment. The ecological risk assessment of PAEs in the surface water showed that the potential environmental risks followed the order of DEHP > DIBP > DBP > DMP > DEP. Comparatively, DEHP posed high ecological risk to sensitive algae, crustaceans and fish, while DMP and DEP exhibited low risk. In the sediment, DIBP exhibited a high risk to the sensitive fish, whereas DMP, DEP, DBP and DEHP displayed no risk.
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Affiliation(s)
- Qingqing Zhu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Longyao Xu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wanyi Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Science, Northeastern University, Shenyang 110819, China
| | - Wenbin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Institute of Environment and Health, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, Zhejiang 310000, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chunyang Liao
- Institute of Environment and Health, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, Zhejiang 310000, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Institute of Environment and Health, Jianghan University, Wuhan, Hubei 430056, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Institute of Environment and Health, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, Zhejiang 310000, China; Institute of Environment and Health, Jianghan University, Wuhan, Hubei 430056, China; College of Science, Northeastern University, Shenyang 110819, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
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31
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Zhou M, Li Y. Modification of PAE-degrading Esterase(CarEW) for Higher Degradation Efficiency Through Integrated Homology Modeling, Molecular Docking, and Molecular Dynamics Simulation. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-022-1433-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Huang Y, Ren W, Liu H, Wang H, Xu Y, Han Y, Teng Y. Contrasting impacts of drying-rewetting cycles on the dissipation of di-(2-ethylhexyl) phthalate in two typical agricultural soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 792:148433. [PMID: 34146807 DOI: 10.1016/j.scitotenv.2021.148433] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 06/09/2021] [Accepted: 06/09/2021] [Indexed: 06/12/2023]
Abstract
Di-(2-ethylhexyl) phthalate (DEHP) pollution has become a growing problem in farmlands of China. Drying-rewetting (DW) cycle is one of frequent environmental changes that agricultural production is confronted with, and also a convenient and practical agronomic regulation measure. In this study, in order to explore the effects of DW cycles on the dissipation of DEHP and their driving mechanisms in different types of soils, we performed a 45-day microcosm culture experiment with two typical agricultural soils, Lou soil (LS) and Red soil (RS). High-throughput sequencing was applied to study the response of soil microbial communities in the process of DEHP dissipation under DW cycles. The results showed that the DW cycles considerably inhibited the dissipation of DEHP in LS while promoted that in RS. The DW cycles obviously decreased the diversity, the relative abundance of significantly differential bacteria, and the total abundance of potential degrading bacterial groups in LS, whereas have little effect on bacterial community in RS, except at the initial cultivation stage when the corresponding parameters were promoted. The inhibition of the DW cycles on DEHP dissipation in LS was mainly derived from microbial degradation, but the interplay between microbial functions and soil attributes contributed to the promotion of DEHP dissipation in RS under the DW cycles. This comprehensive understanding of the contrasting impacts and underlying driving mechanisms may provide crucial implications for the prevention and control of DEHP pollution in regional soils.
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Affiliation(s)
- Yiwen Huang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; School of Environment and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Wenjie Ren
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Haoran Liu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Huimin Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yongfeng Xu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yujuan Han
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Ying Teng
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
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Ren L, Wang G, Huang Y, Guo J, Li C, Jia Y, Chen S, Zhou JL, Hu H. Phthalic acid esters degradation by a novel marine bacterial strain Mycolicibacterium phocaicum RL-HY01: Characterization, metabolic pathway and bioaugmentation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 791:148303. [PMID: 34118676 DOI: 10.1016/j.scitotenv.2021.148303] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/01/2021] [Accepted: 06/01/2021] [Indexed: 05/12/2023]
Abstract
Phthalic acid esters (PAEs) are one of the most widely used plasticizers and the well-studied environmental pollutants with endocrine disrupting properties. Investigation about PAEs in terrestrial ecosystem has been extensively conducted while the fate of PAEs in marine environment remains underexplored. In this study, a novel di-(2-ethylhexyl) phthalate (DEHP) degrading marine bacterial strain, Mycolicibacterium phocaicum RL-HY01, was isolated and characterized from intertidal sediments. Strain RL-HY01 could utilize a range of PAE plasticizers as sole carbon source for growth. The effects of different environmental factors on the degradation of PAEs were evaluated and the results indicated that strain RL-HY01 could efficiently degrade PAEs under a wide range of pH (5.0 to 9.0), temperature (20 °C to 40 °C) and salinity (below 10%). Specifically, when Tween-80 was added as solubilizing agent, strain RL-HY01 could rapidly degrade DEHP and achieve complete degradation of DEHP (50 mg/L) in 48 h. The kinetics of DEHP degradation by RL-HY01 were well fitted with the modified Gompertz model. The metabolic intermediates of DEHP by strain RL-HY01 were identified by ultra-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) analysis and then the metabolic pathway of DEHP was deduced. DEHP was transformed into di-ethyl phthalate (DEP) via β-oxidation and then DEP was hydrolyzed into phthalic acid (PA) by de-esterification. PA was further transformed into gentisate via salicylic acid and further utilized for cell growth. Bioaugmentation of strain RL-HY01 with marine samples was performed to evaluate its application potential and the results suggested that strain RL-HY01 could accelerate the elimination of DEHP in marine samples. The results have advanced our understanding of the fate of PAEs in marine ecosystem and identified an efficient bioremediation strategy for PAEs-polluted marine sites.
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Affiliation(s)
- Lei Ren
- Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518108, China; College of Coastal Agricultural Sciences, School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China
| | - Guan Wang
- Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518108, China; College of Coastal Agricultural Sciences, School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China
| | - Yongxiang Huang
- Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518108, China; College of Coastal Agricultural Sciences, School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China
| | - Jianfu Guo
- Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518108, China; College of Coastal Agricultural Sciences, School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China
| | - Chengyong Li
- Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518108, China; College of Coastal Agricultural Sciences, School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China
| | - Yang Jia
- National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Zhejiang Provincial Key Lab for Subtropical Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou 325035, China
| | - Sha Chen
- Hunan Key Laboratory of Biomass Fiber Functional Materials, School of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
| | - John L Zhou
- Centre for Green Technology, University of Technology Sydney, 15 Broadway, NSW 2007, Australia
| | - Hanqiao Hu
- Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518108, China; College of Coastal Agricultural Sciences, School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China.
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Ghodke VM, Punekar NS. Environmental role of aromatic carboxylesterases. Environ Microbiol 2021; 24:2657-2668. [PMID: 34528362 DOI: 10.1111/1462-2920.15774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 01/14/2023]
Abstract
The carboxylesterases (EC 3.1.1.x) are widely distributed and form an important yet diverse group of hydrolases catalysing the ester bond cleavage in a variety of substrates. Besides acting on plant cell wall components like cutin, tannin and feruloyl esters, they are often the first line of defence to metabolize drugs, xenobiotics, pesticides, insecticides and plastic. But for the promiscuity of some carboxylesterases and cutinases, very few enzymes act exclusively on aromatic carboxylic acid esters. Infrequent occurrence of aromatic carboxylesterases suggests that aromatic carboxylesters are inherently more difficult to hydrolyse than the regular carboxylesters because of both steric and polar effects. Naturally occurring aromatic carboxylesters were rare before the anthropogenic activity augmented their environmental presence and diversity. An appraisal of the literature shows that the hydrolysis of aromatic carboxylic esters is a uniquely difficult endeavour and hence deserves special attention. Enzymes to hydrolyse such esters are evolving rapidly in nature. Very few such enzymes are known and they often display much lower catalytic efficiencies. Obviously, the esters of aromatic carboxylic acids, including polyethylene terephthalate waste, pose an environmental challenge. In this review, we highlight the uniqueness of aromatic carboxylesters and then underscore the importance of relevant carboxylesterases.
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Affiliation(s)
- Venkatesh M Ghodke
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Narayan S Punekar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
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Wang Y, Zhan W, Liu Y, Cheng S, Zhang C, Ma J, Chen R. Di- n-octyl phthalate degradation by a halotolerant bacterial consortium LF and its application in soil. ENVIRONMENTAL TECHNOLOGY 2021; 42:2749-2756. [PMID: 31961776 DOI: 10.1080/09593330.2020.1713903] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 01/04/2020] [Indexed: 06/10/2023]
Abstract
Di-n-octyl phthalate (DOP), a plasticizer used in many different industrial products, is a frequently observed pollutant in the environment. Biodegradation by microorganisms is considered to be a realistic choice for the remediation of DOP contamination. In the present research, the halotolerant bacterial consortium (LF) enriched in our previous research was used to degrade DOP. It was found that the optimal conditions for LF to degrade DOP was temperature 30oC, pH 6.0, inoculum size >5%, and salt content <3%. LF could degrade a high concentration of DOP (2000 mg/L) with the removal efficiency of 96.33%. Substrate inhibition analyses indicated that the inhibition constant, maximum specific degradation rate and half-saturation constant were 2544.6 mg/L, 0.7 d-1 and 59.1 mg/L, respectively. Based on the analysis of the gas chromatography-mass spectrometry (GC-MS), the biodegradation pathway for DOP by LF was proposed. Furthermore, LF could degrade DOP in soil (100 mg/kg) with the highest removal efficiency of 89.3%. This study is the first report on DOP biodegradation by bacterial consortium. These results suggest that LF can be used to remediate DOP-contaminated environment.
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Affiliation(s)
- Yangyang Wang
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions (Henan University), Ministry of Education, Kaifeng, Henan, People's Republic of China
- Key Research Institute of Yellow River Civilization and Sustainable Development & Collaborative Innovation Center on Yellow River Civilization of Henan Province, Henan University, Kaifeng, People's Republic of China
| | - Wenhao Zhan
- National Key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing, People's Republic of China
| | - Yidan Liu
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
| | - Shanshan Cheng
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
| | - Chaosheng Zhang
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
| | - Jianhua Ma
- National Demonstration Center for Environmental and Planning, College of Environment & Planning, Henan University, Kaifeng, People's Republic of China
| | - Runhua Chen
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, People's Republic of China
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36
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Wang LY, Gu YY, Zhang ZM, Sun AL, Shi XZ, Chen J, Lu Y. Contaminant occurrence, mobility and ecological risk assessment of phthalate esters in the sediment-water system of the Hangzhou Bay. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 770:144705. [PMID: 33736359 DOI: 10.1016/j.scitotenv.2020.144705] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
The pollution characteristics, spatiotemporal variation, sediment-water partitioning, and potential ecological risk assessment of phthalate esters (PAEs) in the sediment-seawater system of the Hangzhou Bay (HZB) in summer and autumn were researched. The sum of the concentrations of the 10 PAEs in seawater ranges from 7305 ng/L to 22,861 ng/L in summer and from 8100 ng/L to 33,329 ng/L in autumn, with mean values of 15,567 ± 4390 and 17,884 ± 6850 ng/L, respectively. The Σ16PAEs in the sediments are between 118 and 5888 μg/kg and 145 and 4746 μg/kg in summer and autumn, respectively. The level of PAEs in seawater varies with the seasons, but it is relatively stable in the sediments. Di(2-ethylhexyl) phthalate (DEHP), di-n-butyl phthalate (DnBP), and diisobutyl phthalate (DiBP) are the predominant PAE congeners in the HZB. The DnBP and DiBP concentrations in seawater are greater than the DEHP concentration, which is the opposite in the sediments. The sediment-seawater equilibrium distribution study indicates that the PAEs with medium molecular weights, such as DiBP, butyl benzyl phthalate, and DnBP, are near dynamic equilibrium in the sediment-seawater system; PAEs with high molecular weights (e.g., di-n-octyl phthalate and DEHP) tend to transfer from water to the sediments; and PAEs with low molecular weights (e.g., dimethyl phthalate, diethyl phthalate, and diamyl phthalate) tend to spread to seawater. The risk assessment results in seawater indicate that DEHP and DiBP might pose high potential risks to sensitive organisms, and DnBP might exhibit medium ecological risks. In the sediment, DiBP might display a high potential risk to fish, and the potential risk of DEHP is high in several sites.
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Affiliation(s)
- Liu-Yong Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, School of Marine Sciences, Ningbo University, Ningbo 315211, PR China; College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, PR China
| | - Yan-Yu Gu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, School of Marine Sciences, Ningbo University, Ningbo 315211, PR China; College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, PR China
| | - Ze-Ming Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, School of Marine Sciences, Ningbo University, Ningbo 315211, PR China; School of Marine Sciences, Ningbo University, Ningbo 315211, PR China.
| | - Ai-Li Sun
- School of Marine Sciences, Ningbo University, Ningbo 315211, PR China
| | - Xi-Zhi Shi
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, School of Marine Sciences, Ningbo University, Ningbo 315211, PR China; School of Marine Sciences, Ningbo University, Ningbo 315211, PR China.
| | - Jiong Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, School of Marine Sciences, Ningbo University, Ningbo 315211, PR China; School of Marine Sciences, Ningbo University, Ningbo 315211, PR China
| | - Yin Lu
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, PR China
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Das MT, Kumar SS, Ghosh P, Shah G, Malyan SK, Bajar S, Thakur IS, Singh L. Remediation strategies for mitigation of phthalate pollution: Challenges and future perspectives. JOURNAL OF HAZARDOUS MATERIALS 2021; 409:124496. [PMID: 33187797 DOI: 10.1016/j.jhazmat.2020.124496] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/15/2020] [Accepted: 11/04/2020] [Indexed: 05/12/2023]
Abstract
Phthalates are a group of emerging xenobiotic compounds commonly used as plasticizers. In recent times, there has been an increasing concern over the risk of phthalate exposure leading to adverse effects to human health and the environment. Therefore, it is necessary to not only understand the current status of phthalate pollution, their sources, exposure routes and health impacts, but also identify remediation technologies for mitigating phthalate pollution. Present review article aims to inform its readers about the ever increasing data on health burdens posed by phthalates and simultaneously highlights the recent advancements in research to alleviate phthalate contamination from environment. The article enumerates the major phthalates in use today, traces their environmental fate, addresses their growing health hazard concerns and largely focus on to provide an in-depth understanding of the different physical, chemical and biological treatment methods currently being used or under research for alleviating the risk of phthalate pollution, their challenges and the future research perspectives.
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Affiliation(s)
- Mihir Tanay Das
- Department of Environmental Science, Fakir Mohan University, Balasore 756020, Odisha, India
| | - Smita S Kumar
- J.C. Bose University of Science and Technology, YMCA, Faridabad 121006, Haryana, India; Centre for Rural Development and Technology, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Pooja Ghosh
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Goldy Shah
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Sandeep K Malyan
- Institute for Soil, Water, and Environmental Sciences, The Volcani Center, Agricultural Research Organization (ARO), Rishon LeZion 7505101, Israel
| | - Somvir Bajar
- J.C. Bose University of Science and Technology, YMCA, Faridabad 121006, Haryana, India
| | - Indu Shekhar Thakur
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110 067, India
| | - Lakhveer Singh
- Department of Environmental Science, SRM University-AP, Amaravati 522502, Andhra Pradesh, India.
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Feng NX, Feng YX, Liang QF, Chen X, Xiang L, Zhao HM, Liu BL, Cao G, Li YW, Li H, Cai QY, Mo CH, Wong MH. Complete biodegradation of di-n-butyl phthalate (DBP) by a novel Pseudomonas sp. YJB6. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 761:143208. [PMID: 33162130 DOI: 10.1016/j.scitotenv.2020.143208] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/14/2020] [Accepted: 10/16/2020] [Indexed: 05/26/2023]
Abstract
Phthalate acid esters (PAEs) are environmentally ubiquitous and have aroused a worldwide concern due to their threats to environment and human health. Di-n-butyl phthalate (DBP) is one of the most frequently observed PAEs in the environment. In this study, a novel bacterium identified as Pseudomonas sp. YJB6 that isolated from PAEs-contaminated soil was determined to have strong DBP-degrading activity. A complete degradation of DBP in 200 mg/L was achieved within 3 days when YJB6 was cultivated at 31.4 °C with an initial inoculation size of 0.6 (OD600) in basic mineral salts liquid medium (MSM), pH 7.6. The degradation curves of DBP (50-2000 mg/L) fitted well the first-order kinetics model, with a half-life (t1/2) ranging from 0.86 to 1.88 d. The main degradation intermediates were identified as butyl-ethyl phthalate (BEP), mono-butyl phthalate (MBP), phthalic acid (PA) and benzoic acid (BA), indicating a new complex and complete biodegradation pathway presented by YJB6. DBP might be metabolized through de-esterification, β-oxidation, and hydrolysis, followed by entering the Krebs cycle of YJB6 as a final step. Strain YJB6 was successfully immobilized with sodium alginate (SA), polyvinyl alcohol (PVA), and SA-PVA. The immobilization significantly improved the stability and adaptability of the cells thus resulting in high volumetric DBP-degrading rates compared to that of the freely suspended cells. In addition, these immobilized cells can be reused for many cycles with well conserved in DBP-degrading activity. The ideal DBP degrading ability of the free and immobilized YJB6 cells suggests that strain YJB6, especially the SA-PVA+ YJB6 promises great potential to remove hazardous PAEs.
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Affiliation(s)
- Nai-Xian Feng
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yu-Xi Feng
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Qi-Feng Liang
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Xin Chen
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Lei Xiang
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Hai-Ming Zhao
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Bai-Lin Liu
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Gang Cao
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yan-Wen Li
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Hui Li
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Quan-Ying Cai
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ce-Hui Mo
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
| | - Ming Hung Wong
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; Consortium on Health, Environment, Education and Research (CHEER), Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong, China
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Wang P, Gao J, Zhao Y, Zhang M, Zhou S. Biodegradability of di-(2-ethylhexyl) phthalate by a newly isolated bacterium Achromobacter sp. RX. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 755:142476. [PMID: 33035973 DOI: 10.1016/j.scitotenv.2020.142476] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 09/16/2020] [Accepted: 09/17/2020] [Indexed: 05/12/2023]
Abstract
Di-(2-ethylhexyl) phthalate (DEHP) is a chemical plasticizer that has been commonly used in the manufacture of polyvinyl chloride. DEHP is one of the environmental pollution sources. In this study, a gram-negative strain RX bacterium utilizing DEHP as sole carbon source was isolated from activated sludge through screening test. This strain RX was identified as Achromobacter sp. RX based on its morphology, physiological properties and 16S rRNA gene sequence analysis. The results showed that the optimal conditions for the DEHP degradation were 30.0 °C and pH 7.0. The DEHP degradation induced by strain RX demonstrated nitrogen source dependent, while followed a decreasing degradation rate under the source of: NO3- > NH4+ > NO2-. The biodegradability of Achromobacter sp. RX was enhanced with Masson pine seed powder as a co-metabolic substrate and Tween-80 as a solubilizing agent. Meanwhile, the degrading kinetics analysis was performed in the condition of DEHP as sole carbon source. The DEHP degradation curves fitted well with the first-order kinetic model at 50-300 mg/L of DEHP, with the half-life ranging from 13.0 to 16.4 h. During the biodegradation of DEHP, mono-(2-ehtylhexyl) phthalate (MEHP) was firstly generated through de-esterification, followed by the formation of phthalic acid and benzoic acid after further de-esterification of MEHP. Benzoic acid was finally mineralized to CO2 and H2O. The decontamination of DEHP-contaminated soil by Achromobacter sp. RX was investigated using a rotating-drum bioreactor. Evolution of total organic carbon from the contaminated soil showed that 86.4%-91.7% of DEHP was mineralized at pH 7.0 and 30.0 °C within 96 h. Reusability of Achromobacter sp. RX and its lifetime were observed over six consecutive cycles. Thus, Achromobacter sp. RX possessed high DEHP biodegradability, which provided a good potential in dealing with DEHP-contaminated soil.
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Affiliation(s)
- Ping Wang
- School of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China; Key Laboratory of Forest Genetics and Biotechnology, Ministry of Education, Nanjing Forestry University, Nanjing 210037, China.
| | - Jingjing Gao
- School of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China; Key Laboratory of Forest Genetics and Biotechnology, Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Yu Zhao
- School of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China; Key Laboratory of Forest Genetics and Biotechnology, Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Min Zhang
- School of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China; Key Laboratory of Forest Genetics and Biotechnology, Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Sijie Zhou
- School of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China; Key Laboratory of Forest Genetics and Biotechnology, Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
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Tran HT, Lin C, Bui XT, Itayama T, Dang BT, Cheruiyot NK, Hoang HG, Vu CT. Bacterial community progression during food waste composting containing high dioctyl terephthalate (DOTP) concentration. CHEMOSPHERE 2021; 265:129064. [PMID: 33248736 DOI: 10.1016/j.chemosphere.2020.129064] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 11/02/2020] [Accepted: 11/17/2020] [Indexed: 06/12/2023]
Abstract
The overall dioctyl terephthalate (DOTP) degradation efficiency during food waste composting was 98%. The thermophilic phases contributed to 76% of the overall degradation efficiency, followed by the maturation phase (22%), then the mesophilic phase (0.7%). The thermophilic phase had the highest specific degradation rate of 0.149 d-1. The progression of the bacterial community during the composting process was investigated to understand DOTP biodegradation. The results showed that the bacterial richness and the alpha diversity of the DOTP composting were similar to a typical composting process, indicating that the high concentration of DOTP did not hinder the thriving and evolution of the bacterial community. Additionally, Firmicutes was the most dominant at the phylum level, followed by Proteobacteria and Bacteroidetes. Bacilli was the most dominant class (70%) in the mesophilic phase, with the abundance decreasing thereafter in the thermophilic and maturation phase. Moreover, Lactobacillus sp. was the dominant species at the beginning of the experiment, which was probably responsible for DOTP biodegradation. The high removal efficiency observed in the maturation phase indicates that degradation occurs in all the composting phases, and that compost can be used to enhance natural attenuation. These findings provide a better understanding of the bacterial communities during biodegradation of DOTP and plasticizers via food waste composting and should facilitate the development of appropriate green bioremediation technologies.
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Affiliation(s)
- Huu Tuan Tran
- College of Maritime, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan
| | - Chitsan Lin
- College of Maritime, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan.
| | - Xuan Thanh Bui
- Key Laboratory of Advanced Waste Treatment Technology, Vietnam National University Ho Chi Minh (VNU-HCM), Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, 700000, Viet Nam.
| | - Tomoaki Itayama
- Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, Japan
| | - Bao Trong Dang
- Ho Chi Minh City University of Technology - HUTECH, Ho Chi Minh City, 700000, Viet Nam
| | - Nicholas Kiprotich Cheruiyot
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan
| | - Hong Giang Hoang
- College of Maritime, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan
| | - Chi Thanh Vu
- Department of Civil and Environmental Engineering, The University of Alabama in Huntsville, AL, 35899, USA
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Zhang H, Lin Z, Liu B, Wang G, Weng L, Zhou J, Hu H, He H, Huang Y, Chen J, Ruth N, Li C, Ren L. Bioremediation of di-(2-ethylhexyl) phthalate contaminated red soil by Gordonia terrae RL-JC02: Characterization, metabolic pathway and kinetics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 733:139138. [PMID: 32446058 DOI: 10.1016/j.scitotenv.2020.139138] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 06/11/2023]
Abstract
Di-(2-ethylhexyl) phthalate (DEHP) is the most widely used plasticizer and a representative endocrine disrupting chemical. The toxicological effects of DEHP on environmental and human health have been widely investigated. In this study, the DEHP-degrading bacterial strain RL-JC02 was isolated from red soil with long-term usage of plastic mulch, and it was identified as Gordonia terrae by 16S rRNA gene analysis coupled with physiological and biochemical characterization. The biodegrading capacity of different phthalic acid esters and related intermediates was investigated as well as the performance of strain RL-JC02 under different environmental conditions, such as temperature, pH, salinity and DEHP concentration. Specifically, strain RL-JC02 showed good tolerance to low pH, with 86.6% of DEHP degraded under the initial pH of 5.0 within 72 h. The metabolic pathway of DEHP was examined by metabolic intermediate identification via a high-performance liquid chromatography coupled with mass spectrometry (HPLC-MS) analysis in which DEHP was hydrolyzed into phthalic acid (PA) and 2-ethylhexanol (2-EH) via mono (2-ethylhexyl) phthalate (MEHP). PA and 2-EH were further utilized through the protocatechuic acid metabolic pathway and β-oxidation via protocatechuic acid and 2-ethylhexanoic acid, respectively. The application potential of strain RL-JC02 was confirmed through the bioremediation of artificial DEHP-contaminated red soil showing 91.8% DEHP degradation by strain RL-JC02 within 30 d. The kinetics analysis of DEHP degradation by strain RL-JC02 in soil demonstrated that the process followed the modified Gompertz model. Meanwhile, the cell concentration monitoring of strain RL-JC02 in soil with absolute quantification polymerase chain reaction (qPCR) suggested that strain RL-JC02 survived well during bioremediation. This study provides sufficient evidence of a robust degrader for the bioremediation of PAE-contaminated red soil.
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Affiliation(s)
- Hongyan Zhang
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Zhong Lin
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China; School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China
| | - Bin Liu
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China; Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518108, China
| | - Guan Wang
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Liyun Weng
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Junliang Zhou
- Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518108, China; School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China
| | - Hanqiao Hu
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Hong He
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Yongxiang Huang
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Jinjun Chen
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Nahurira Ruth
- Faculty of Science, Kabale University, Kabale 317, Uganda
| | - Chengyong Li
- School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China
| | - Lei Ren
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China; Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518108, China.
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Li X, Zhu W, Meng G, Guo R, Wang Y. Phytoremediation of alkaline soils co-contaminated with cadmium and tetracycline antibiotics using the ornamental hyperaccumulators Mirabilis jalapa L. and Tagetes patula L. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:14175-14183. [PMID: 32037495 DOI: 10.1007/s11356-020-07975-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 02/03/2020] [Indexed: 06/10/2023]
Abstract
The co-contamination of farmland soils with heavy metals and antibiotics from the application of livestock and poultry manures poses great threats to human health. Phytoremediation might be a good solution to this problem. A pot culture experiment was conducted to evaluate the remediation capacity of two ornamental hyperaccumulators, namely, Mirabilis jalapa L. and Tagetes patula L., in alkaline soils co-contaminated with cadmium (Cd) and tetracycline antibiotics (TCs). The growth of M. jalapa and T. patula was significantly influenced by the co-contaminated soil. In treatments with TCs alone, the growth of T. patula was promoted (p < 0.05), while that of M. jalapa was inhibited. In the C2T3 treatment with TCs and Cd combined, the biomass of T. patula and M. jalapa decreased by 42.27% and 56.15% in roots and by 22.24% and 32.27% for in shoots, respectively, compared with those in the same treatment without TCs. The addition of TCs increased the accumulation of Cd in treatments with less than 15.0 mg/kg Cd. In M. jalapa, the concentration of Cd increased by 4.64% and 39.69% in roots and by 30.33% and 71.71% in shoots, and that in T. patula increased by 74.66% and 11.03% in roots and by 15.36% and 17.58% in shoots, respectively, in two treatments with TCs compared with those in the treatments with Cd alone. However, the accumulated Cd amounts decreased from 36.25 to 31.91 μg/pot and increased from 201.33 to 229.26 μg/pot in C2T2 for M. jalapa and T. patula, respectively, compared with those in the treatments without TCs. The TC removal efficiencies of all treatments were above 99%, and the residual amounts of TC and OTC were higher than that of CTC. M. jalapa and T. patula are promising hyperaccumulators that can be used for the remediation of alkaline soil co-contaminated with Cd and TCs.
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Affiliation(s)
- Xuhui Li
- National Demonstration Center for Environment and Planning, Henan University, Kaifeng, 475004, China
- Key Laboratory of Environment Change & Water-land Pollution Control, College of Environment and Planning, Henan University, University of Henan Province, Kaifeng, 475004, China
- Henan Engineering Research Centre for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng, 475004, China
| | - Weigang Zhu
- National Demonstration Center for Environment and Planning, Henan University, Kaifeng, 475004, China
| | - Gengjian Meng
- National Demonstration Center for Environment and Planning, Henan University, Kaifeng, 475004, China
| | - Ruichao Guo
- National Demonstration Center for Environment and Planning, Henan University, Kaifeng, 475004, China.
- Key Laboratory of Environment Change & Water-land Pollution Control, College of Environment and Planning, Henan University, University of Henan Province, Kaifeng, 475004, China.
- Henan Engineering Research Centre for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng, 475004, China.
| | - Yulong Wang
- National Demonstration Center for Environment and Planning, Henan University, Kaifeng, 475004, China.
- Key Laboratory of Environment Change & Water-land Pollution Control, College of Environment and Planning, Henan University, University of Henan Province, Kaifeng, 475004, China.
- Henan Engineering Research Centre for Control & Remediation of Soil Heavy Metal Pollution, Henan University, Kaifeng, 475004, China.
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Hong X, Zhao Y, Zhuang R, Liu J, Guo G, Chen J, Yao Y. Bioremediation of tetracycline antibiotics-contaminated soil by bioaugmentation. RSC Adv 2020; 10:33086-33102. [PMID: 35694106 PMCID: PMC9122622 DOI: 10.1039/d0ra04705h] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/16/2020] [Indexed: 12/03/2022] Open
Abstract
Bioaugmentation using specific microbial strains or consortia was deemed to be a useful bioremediation technology for increasing bioremediation efficiency. The present study confirmed the effectiveness and feasibility of bioaugmentation capability of the bacterium BC immobilized on sugarcane bagasse (SCB) for degradation of tetracycline antibiotics (TCAs) in soil. It was found that an inoculation dose of 15% (v/w), 28–43 °C, slightly acidic pH (4.5–6.5), and the addition of oxytetracycline (OTC, from 80 mg kg−1 to 160 mg kg−1) favored the bioaugmentation capability of the bacterium BC, indicating its strong tolerance to high temperature, pH, and high substrate concentrations. Moreover, SCB-immobilized bacterium BC system exhibited strong tolerance to heavy metal ions, such as Pb2+ and Cd2+, and could fit into the simulated soil environment very well. In addition, the bioaugmentation and metabolism of the co-culture with various microbes was a complicated process, and was closely related to various species of bacteria. Finally, in the dual-substrate co-biodegradation system, the presence of TC at low concentrations contributed to substantial biomass growth but simultaneously led to a decline in OTC biodegradation efficiency by the SCB-immobilized bacterium BC. As the total antibiotic concentration was increased, the OTC degradation efficiency decreased gradually, while the TC degradation efficiency still exhibited a slow rise tendency. Moreover, the TC was preferentially consumed and degraded by continuous introduction of OTC into the system during the bioremediation treatment. Therefore, we propose that the SCB-immobilized bacterium BC exhibits great potential in the bioremediation of TCAs-contaminated environments. Bioaugmentation using specific microbial strains or consortia was deemed to be a useful bioremediation technology for increasing bioremediation efficiency.![]()
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Affiliation(s)
- Xiaxiao Hong
- College of Materials and Energy
- South China Agricultural University
- Guangzhou
- PR China
| | - Yuechun Zhao
- College of Materials and Energy
- South China Agricultural University
- Guangzhou
- PR China
| | - Rudong Zhuang
- College of Materials and Energy
- South China Agricultural University
- Guangzhou
- PR China
| | - Jiaying Liu
- College of Materials and Energy
- South China Agricultural University
- Guangzhou
- PR China
| | - Guantian Guo
- College of Materials and Energy
- South China Agricultural University
- Guangzhou
- PR China
| | - Jinman Chen
- College of Materials and Energy
- South China Agricultural University
- Guangzhou
- PR China
| | - Yingming Yao
- College of Materials and Energy
- South China Agricultural University
- Guangzhou
- PR China
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