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Della-Negra O, Camotti Bastos M, Bru-Adan V, Santa-Catalina G, Ait-Mouheb N, Chiron S, Heran M, Wéry N, Patureau D. Role of endogenous soil microorganisms in controlling antimicrobial resistance after the exposure to treated wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 931:172977. [PMID: 38703836 DOI: 10.1016/j.scitotenv.2024.172977] [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: 11/23/2023] [Revised: 05/01/2024] [Accepted: 05/02/2024] [Indexed: 05/06/2024]
Abstract
The reuse of treated wastewater (TWW) for irrigation appears to be a relevant solution to the challenges of growing water demand and scarcity. However, TWW contains not only micro-pollutants including pharmaceutical residues but also antibiotic resistant bacteria. The reuse of TWW could contribute to the dissemination of antimicrobial resistance in the environment. The purpose of this study was to assess if exogenous bacteria from irrigation waters (TWW or tap water-TP) affect endogenous soil microbial communities (from 2 soils with distinct irrigation history) and key antibiotic resistance gene sul1 and mobile genetic elements intl1 and IS613. Experiments were conducted in microcosms, irrigated in one-shot, and monitored for three months. Results showed that TP or TWW exposure induced a dynamic response of soil microbial communities but with no significant increase of resistance and mobile gene abundances. However, no significant differences were observed between the two water types in the current experimental design. Despite this, the 16S rDNA analysis of the two soils irrigated for two years either with tap water or TWW resulted in soil microbial community differentiation and the identification of biomarkers from Xanthomonadaceae and Planctomycetes families for soils irrigated with TWW. Low-diversity soils were more sensitive to the addition of TWW. Indeed, TWW exposure stimulated the growth of bacterial genera known to be pathogenic, correlating with a sharp increase in the copy number of selected resistance genes (up to 3 logs). These low-diversity soils could thus enable the establishment of exogenous bacteria from TWW which was not observed with native soils. In particular, the emergence of Planctomyces, previously suggested as a biomarker of soil irrigated by TWW, was here demonstrated. Finally, this study showed that water input frequency, initial soil microbial diversity and soil history drive changes within soil endogenous communities and the antibiotic resistance gene pool.
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Affiliation(s)
- Oriane Della-Negra
- INRAE, University of Montpellier, LBE, Av. des Étangs, 11100 Narbonne, France; UMR HydroSciences Montpellier, University of Montpellier, IRD, CNRS, 15 Av. Charles Flahault, 34093 Montpellier cedex 5, France.
| | - Marília Camotti Bastos
- INRAE, University of Montpellier, LBE, Av. des Étangs, 11100 Narbonne, France; UMR HydroSciences Montpellier, University of Montpellier, IRD, CNRS, 15 Av. Charles Flahault, 34093 Montpellier cedex 5, France
| | - Valérie Bru-Adan
- INRAE, University of Montpellier, LBE, Av. des Étangs, 11100 Narbonne, France
| | | | - Nassim Ait-Mouheb
- INRAE, University of Montpellier, UMR GEAU, 361 rue Jean-François Breton, 34196 Montpellier, France
| | - Serge Chiron
- UMR HydroSciences Montpellier, University of Montpellier, IRD, CNRS, 15 Av. Charles Flahault, 34093 Montpellier cedex 5, France
| | - Marc Heran
- IEM, University of Montpellier, Montpellier, France
| | - Nathalie Wéry
- INRAE, University of Montpellier, LBE, Av. des Étangs, 11100 Narbonne, France
| | - Dominique Patureau
- INRAE, University of Montpellier, LBE, Av. des Étangs, 11100 Narbonne, France
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Huang H, Shi Y, Gong Z, Wang J, Zheng L, Gao S. Revealing the characteristics of biofilms on different polypropylene plastic products: Comparison between disposable masks and takeaway boxes. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133400. [PMID: 38198871 DOI: 10.1016/j.jhazmat.2023.133400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 12/26/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024]
Abstract
The increasingly severe plastic pollution issue was intensified by the enormous plastic emissions into ecosystems during the Covid-19 pandemic. Plastic wastes entering the environment were swiftly exposed to microorganisms and colonized by biofilms, and the plastic-biofilm combined effects further influenced the ecosystem. However, the non-woven structure of disposable masks discarded carelessly during the COVID-19 pandemic was different from those of plastics with flat surface. To reveal the potential effects of plastic structure on colonized biofilms, white disposable surgical masks (DM) and transparent takeaway boxes (TB), both made of polyethylene, were selected for the incubation of organic conditioning films and biofilms. The results indicated that the non-woven structure of disposable mask was destroyed by the influence of water infiltration and biofilm colonization. The influence of surface structure on conditioning films led to a relatively higher proportion of tryptophan-like substances on DM than those on TB samples. Therefore, biofilms with significantly higher microbial biomass and carbon metabolic capacity were formed on DM than those on TB samples owing to the combined effects of their differences in surface structure and conditioning films. Moreover, abundant functional microorganisms associated with stress tolerance, carbon metabolism and biofilm formation were observed in biofilms on disposable mask. Combining with the results of partial least squares regression analysis, the selective colonization of functional microorganisms on disposable masks with uneven surface longitudinal fluctuation was revealed. Although the predicted functions of biofilms on disposable masks and takeaway boxes showed more similarity to each other than to those of free-living aquatic microorganisms owing to the existence of the plastisphere, biofilms on disposable masks may potentially trigger environmental risks different from those of takeaway boxes by unique carbon metabolism and abundant biomass.
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Affiliation(s)
- Hexinyue Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Yanqi Shi
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Zhimin Gong
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Jiahao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Lezhou Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, People's Republic of China.
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Lei J, Qi R, Tumrani SH, Dong L, Jia H, Lei P, Yang Y, Feng C. Selective stepwise adsorption for enhanced removal of multi-component dissolved organic chemicals from petrochemical wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169600. [PMID: 38151126 DOI: 10.1016/j.scitotenv.2023.169600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/28/2023] [Accepted: 12/20/2023] [Indexed: 12/29/2023]
Abstract
The coexistence of multi-component dissolved organic chemicals causes tremendous challenge in purifying petrochemical wastewater, and stepwise selective adsorption holds the most promise for enhanced treatments. This study is designed to enhance the removal of multiple dissolved organic chemicals by stepwise adsorption. Special attention is given to the selective removal mechanisms for the major pollutant N,N-dimethylformamide (DMF), the sensitive pollutant fluorescent dissolved organic matter (FDOM) and other components. The results indicated that the combination of coal activated carbon and aluminum silica gel produced a synergistic effect and broke the limitation of removing only certain pollutants. Combined removal rates of 80.5 % for the dissolved organic carbon and 86.7 % for the biotoxicity in petrochemical wastewater were obtained with the enhanced two-step adsorption. The adsorption performance of both adsorbents remained stable even after five cycles. The selective adsorption mechanism revealed that hydrophobic organics such as DMF was adsorbed by the macropores of coal activated carbon, while the FDOM was eliminated by π-π stacking, electrostatic interaction and hydrophobic interaction. The hydrophilic organics were removed by the mesopores of aluminum silica gel, the silica hydroxyl groups and hydrophilic interaction. This study provides a comprehensive understanding of the selective adsorption mechanism and enhanced stepwise removal of multiple pollutants in petrochemical wastewater, which will guide the deep treatment of complex wastewater.
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Affiliation(s)
- Jinming Lei
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, PR China; The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Ruifang Qi
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, PR China; College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, PR China
| | - Sadam Hussain Tumrani
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, PR China
| | - Lili Dong
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, PR China
| | - Huixian Jia
- Shanxi Xinhua Chemical Defense Equipment Research Institute Co., Ltd., Taiyuan 030008, PR China
| | - Peng Lei
- Shanxi Xinhua Chemical Defense Equipment Research Institute Co., Ltd., Taiyuan 030008, PR China
| | - Yu Yang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, PR China
| | - Chenghong Feng
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, PR China; The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, PR China.
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Yan B, Jiang L, Zhou H, Okokon Atakpa E, Bo K, Li P, Xie Q, Li Y, Zhang C. Performance and microbial community analysis of combined bioreactors in treating high-salinity hydraulic fracturing flowback and produced water. BIORESOURCE TECHNOLOGY 2023; 386:129469. [PMID: 37451509 DOI: 10.1016/j.biortech.2023.129469] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 07/02/2023] [Accepted: 07/05/2023] [Indexed: 07/18/2023]
Abstract
The anoxic/oxic systems are a widely used biological strategy for wastewater treatment. However, little is known about the performance and microbial community correlation of different combined bioreactors in the treatment of high-COD and high-salinity hydraulic fracturing flowback and produced water (HF-FPW). In this study, the performance of Up-flow anaerobic sludge bed-bio-contact oxidation reactor (UASB-BCOR) and Fixed-bed baffled reactor (FBR-BCOR) in treating HF-FPW was investigated and compared. The results suggested the FBR-BCOR could efficiently remove COD, SS, NH4+-N, and oil pollutants, and it exhibited better resistance to the negative interference of hydraulic shock load on it. Besides, the correlation analysis first disclosed the key functional genera during the degradation process, including Ignavibacterium, Ellin6067, and Zixibacteria. Moreover, network analysis revealed that the difference of microbial co-occurrence network structure is the main driving factor for the difference of bioreactor processing capacity. This work demonstrates the feasibility and potential of FBR-BCOR in treating HF-FPW.
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Affiliation(s)
- Bozhi Yan
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
| | - Lijia Jiang
- Institute of Marine Biology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China
| | - Hanghai Zhou
- Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
| | - Edidiong Okokon Atakpa
- Institute of Marine Biology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China
| | - Kuiyong Bo
- Xinjiang Keli New Technology Development Co., Ltd., Karamay 834000, Xinjiang, China
| | - Pingyuan Li
- Xinjiang Keli New Technology Development Co., Ltd., Karamay 834000, Xinjiang, China
| | - Qinglin Xie
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
| | - Yanhong Li
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
| | - Chunfang Zhang
- Institute of Marine Biology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China.
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Zhang NC, A D, Chao YQ, Li HY, Li C, Lin QQ, Li YY, Qiu RL. Mechanism of polycyclic aromatic hydrocarbons degradation in the rhizosphere of Phragmites australis: Organic acid co-metabolism, iron-driven, and microbial response. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 327:121608. [PMID: 37044257 DOI: 10.1016/j.envpol.2023.121608] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 04/06/2023] [Accepted: 04/07/2023] [Indexed: 06/19/2023]
Abstract
Microbial co-metabolism is crucial for the efficient biodegradation of polycyclic aromatic hydrocarbons (PAHs); however, their intrinsic mechanisms remain unclear. To explore the co-metabolic degradation of PAHs, root organic acids (ROAs) (phenolic ROAs: caffeic acid [CA] and ferulic acid [FA]; non-phenolic ROAs: oxalic acid [OA]) were exogenously added as co-metabolic substrates under high (HFe) and low (LFe) iron levels in this study. The results demonstrated that more than 90% of PAHs were eliminated from the rhizosphere of Phragmites australis. OA can promote the enrichment of unrelated degrading bacteria and non-specific dioxygenases. FA with a monohydroxy structure can activate hydroxylase; however, it relies on phytosiderophores released by plants (such as OA) to adapt to stress. Therefore, non-specific co-metabolism occurred in these units. The best performance for PAH removal was observed in the HFe-CA unit because: (a) HFe concentrations enriched the Fe-reducing and denitrifying bacteria and promoted the rate-limiting degradation for PAHs as the enzyme cofactor; (b) CA with a dihydroxyl structure enriched the related degrading bacteria, stimulated specific dioxygenase, and activated Fe to concentrate around the rhizosphere simultaneously to perform the specific co-metabolism. Understanding the co-metabolic degradation of PAHs will help improve the efficacy of rhizosphere-mediated remediation.
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Affiliation(s)
- Ni-Chen Zhang
- School of Environmental Science and Engineering, Guangdong Provincial Key Lab for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510006, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Dan A
- Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Yuan-Qing Chao
- School of Environmental Science and Engineering, Guangdong Provincial Key Lab for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510006, China
| | - Hai-Yan Li
- Key Laboratory of Prevention and Control for Aquatic Invasive Alien Species, Ministry of Agriculture and Rural Affairs & Guangdong Provincial Key Laboratory of Aquatic Animal Immunology and Sustainable Aquaculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Charles Li
- Department of Public Health, California State University, East Bay, CA, 94542, USA
| | - Qing-Qi Lin
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Ya-Ying Li
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Rong-Liang Qiu
- School of Environmental Science and Engineering, Guangdong Provincial Key Lab for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510006, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China.
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Ahmad Wadaan M, Baabbad A, Farooq Khan M, Shanmuganathan R, Daniel F. Phytotoxicity and cytotoxicity attributes of immobilized Bacillus cereus treated and untreated textile effluents on Vigna mungo seeds and Artemia franciscana larvae. ENVIRONMENTAL RESEARCH 2023; 231:116111. [PMID: 37178746 DOI: 10.1016/j.envres.2023.116111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 05/07/2023] [Accepted: 05/10/2023] [Indexed: 05/15/2023]
Abstract
The physicochemical attributes of textile effluents collected from secondary treatment stage was investigated in this study and also assess the biosorption potential of membrane immobilized Bacillus cereus and free form of Bacillus cereus on textile effluent through bioreactor model study to find a sustainable solution to manage the textile effluent as vital need. Furthermore, the phytotoxicity and cytotoxicity nature of treated and untreated textile effluents on Vigna mungo and Artemia franciscana larvae under laboratory conditions as a novel approach. The textile effluent physicochemical parameter analysis results showed that the properties such as colour (Hazen unit), pH, turbidity, As, Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Cd, Cl, Cr, Cu, Hg, Ni, Pb, SO42-, and Zn were beyond the acceptable limits. Bacillus cereus immobilized on a polyethylene membrane eliminated greater amounts of dye (25.0 ± 1.3, 56.5 ± 1.8, 57.18 ± 1.5, and 54.34 ± 1.7 Hazen unit from An1, Ae2, Ve3, and So4 respectively) and pollutants (As: 0.9-2.0, Cd: 6-8, Cr: 300-450, Cu: 5-7, Hg: 0.1-0.7, Ni: 8-14, Pb: 4-5, and Zn: 4-8 mg L-1) from textile effluent in a week of biosorption investigation using a bioreactor model (batch type) compared to a free form of B. cereus on textile effluent. The phytotoxicity and cytotoxicity study results revealed that the membrane immobilized B. cereus treated textile effluent exposure showed reduced phytotoxicity and minimal cytotoxicity (including mortality) percentage compared with free form B. cereus treated and untreated textile effluents. These entire results conclude that the membrane immobilized B. cereus may considerably minimize/detoxify the harmful pollutants from the textile effluents. A large scale level biosorption approach need to be performed to validate the maximum pollutants removing potential of this membrane immobilized bacteria species and optimal conditions for effective remediation.
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Affiliation(s)
- Mohammad Ahmad Wadaan
- Bio-Products Research Chair, Department of Zoology, College of Sciences, King Saud University, P.O. Box; 2455, Riyadh, 11451, Saudi Arabia.
| | - Almohannad Baabbad
- Bio-Products Research Chair, Department of Zoology, College of Sciences, King Saud University, P.O. Box; 2455, Riyadh, 11451, Saudi Arabia
| | - Muhammad Farooq Khan
- Bio-Products Research Chair, Department of Zoology, College of Sciences, King Saud University, P.O. Box; 2455, Riyadh, 11451, Saudi Arabia
| | | | - Freedon Daniel
- Department of Mechanical Engineering, SRM Institute of Science and Technology, Ghaziabad, 201204, India.
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Long W, Chen Z, Shi J, Yang S. Efficient Removal of Cr(VI) Ions in Petrochemical Wastewater Using Fe 3O 4@ Saccharomyces cerevisiae Magnetic Nanocomposite. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12183250. [PMID: 36145038 PMCID: PMC9500928 DOI: 10.3390/nano12183250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/08/2022] [Accepted: 09/12/2022] [Indexed: 05/30/2023]
Abstract
Saccharomyces cerevisiae (SC) is a widely available biobased source for function material. In this work, a kind of new efficient magnetic composite adsorbent containing Fe3O4 and SC was prepared successfully and used for the removal of Cr(VI) ions in petrochemical wastewater. The morphology and structure of this magnetic adsorbent were characterized with FT-IR, TG, XRD, VSM, SEM and XPS. The effect of the different factors such as pH, adsorption time, initial Cr(VI) ions concentration and adsorption temperature on the adsorption behavior were investigated. The results showed that 10%-Fe3O4@SC exhibited high removal rate, reutilization and large removal capacity. The corresponding removal capacity and removal rate could reach 128.03 mg/g and 96.02% when the pH value was 2, adsorption time was 180 min, and initial Cr(VI) ions concentration were 80 mg/L at 298 K. The kinetics followed the pseudo-first-order, which indicated that the adsorption behavior of 10%-Fe3O4@SC for Cr(VI) ions belonged to the physical adsorption and chemical adsorption co-existence. The thermodynamic study showed that the adsorption process was spontaneous and exothermic. It still showed better adsorption performance and reutilization after the fifth adsorption-desorption experiment. The possible mechanism of Cr(VI) ions adsorption onto the 10%-Fe3O4@SC magnetic adsorbent has been discussed. Hence, this new adsorbent will be a candidate for industry-level applications in petrochemical wastewater containing Cr(VI) ions.
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Affiliation(s)
- Wei Long
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Guangdong University of Petrochemical Technology, Maoming 525000, China
- College of Chemistry, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Zhilong Chen
- College of Chemistry, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Jie Shi
- College of Chemistry, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Shilin Yang
- College of Chemistry, Guangdong University of Petrochemical Technology, Maoming 525000, China
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Heterogeneous Activation of Peroxymonosulfate by a Spinel CoAl2O4 Catalyst for the Degradation of Organic Pollutants. Catalysts 2022. [DOI: 10.3390/catal12080847] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Bimetallic catalysts have significantly contributed to the chemical community, especially in environmental science. In this work, a CoAl2O4 spinel bimetal oxide was synthesized by a facile co-precipitation method and used for the degradation of organic pollutants through peroxymonosulfate (PMS) activation. Compared with Co3O4, the as-prepared CoAl2O4 possesses a higher specific surface area and a larger pore volume, which contributes to its becoming increasingly conducive to the degradation of organic pollutants. Under optimal conditions (calcination temperature: 500 °C, catalyst: 0.1 g/L, and PMS: 0.1 g/L), the as-prepared CoAl2O4 catalyst could degrade over 99% of rhodamine B (RhB) at a degradation rate of 0.048 min−1, which is 2.18 times faster than Co3O4 (0.022 min−1). The presence of Cl− could enhance RhB degradation in the CoAl2O4/PMS system, while HCO3− and CO32− inhibit RhB degradation. Furthermore, the considerable reusability and universality of CoAl2O4 were testified. Through quenching tests, 1O2 and SO4•− were identified as the primary reactive species in RhB degradation. The toxicity evaluation verified that the degraded solution exhibited lower biological toxicity than the initial RhB solution. This study provides new prospects in the design of cost-effective and stable cobalt-based catalysts and promotes the application of PMS-based advanced oxidation processes for refractory wastewater treatment.
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Zeng T, Wang L, Zhang X, Song X, Li J, Yang J, Chen S, Zhang J. Characterization of Microbial Communities in Wastewater Treatment Plants Containing Heavy Metals Located in Chemical Industrial Zones. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19116529. [PMID: 35682115 PMCID: PMC9180875 DOI: 10.3390/ijerph19116529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/24/2022] [Accepted: 05/24/2022] [Indexed: 12/24/2022]
Abstract
Water pollution caused by heavy metals (HMs) poses a serious risk to human health and the environment and can increase the risk of diabetes, cancer, and hypertension in particular. In this study, two full-scale wastewater treatment plants (WWTPs) in industrial zones in southern China were selected to analyze the microbial community structure, diversity, similarity, and differentiation in the anoxic/oxic (AO) and anoxic/oxic membrane bioreactor (AO-MBR) units under the stress of HMs. High-throughput sequencing showed that microbial diversity and abundance were higher in the AO process than in the AO-MBR process. In the two WWTPs, the common dominant phyla were Proteobacteria and Bacteroidetes, while the common dominant genera were Gemmatimonadaceae, Anaerolineaceae, Saprospiraceae, and Terrimonas. Manganese (Mn) and zinc (Zn) positively correlated with Saccharimonadales, Nakamurella, Micrococcales, and Microtrichales, whereas copper (Cu) and iron (Fe) positively correlated with Longilinea and Ferruginibacter. Additionally, the relative abundances of Chloroflexi, Patescibacteria, and Firmicutes differed significantly (p < 0.05) between the two processes. These results may provide comprehensive outlooks on the characterization of microbial communities in WWTPs, which could also help to reduce the potential environmental risks of the effluent from WWTPs located in industrial zones.
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Affiliation(s)
- Taotao Zeng
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang 421001, China; (T.Z.); (L.W.); (X.Z.); (X.S.); (J.L.); (J.Y.); (S.C.)
| | - Liangqin Wang
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang 421001, China; (T.Z.); (L.W.); (X.Z.); (X.S.); (J.L.); (J.Y.); (S.C.)
| | - Xiaoling Zhang
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang 421001, China; (T.Z.); (L.W.); (X.Z.); (X.S.); (J.L.); (J.Y.); (S.C.)
| | - Xin Song
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang 421001, China; (T.Z.); (L.W.); (X.Z.); (X.S.); (J.L.); (J.Y.); (S.C.)
| | - Jie Li
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang 421001, China; (T.Z.); (L.W.); (X.Z.); (X.S.); (J.L.); (J.Y.); (S.C.)
| | - Jinhui Yang
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang 421001, China; (T.Z.); (L.W.); (X.Z.); (X.S.); (J.L.); (J.Y.); (S.C.)
| | - Shengbing Chen
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang 421001, China; (T.Z.); (L.W.); (X.Z.); (X.S.); (J.L.); (J.Y.); (S.C.)
| | - Jie Zhang
- State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150090, China
- Correspondence:
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