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Chen H, Lei L, Li Z, Zhou H, Cheng H, Chen Z, Wang Y, Wang Y. Redundancy and resilience of microbial community under aniline stress during wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 951:175822. [PMID: 39197768 DOI: 10.1016/j.scitotenv.2024.175822] [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: 04/21/2024] [Revised: 08/15/2024] [Accepted: 08/25/2024] [Indexed: 09/01/2024]
Abstract
Aniline is one of the most toxic and widespread organic pollutants. Although biological treatment is cost-effective and generates minimal secondary pollution, microbial communities are significantly affected by high aniline concentrations, which result in low degradation efficiency. However, a comprehensive understanding of the microbial community response to aniline stress is lacking. Here, we performed a cyclic experiment with aniline concentrations (200, 600, 1200, 600, and 200 mg/L) to investigate the ability of microbial communities to recover their performance after exposure to high aniline concentrations. At aniline concentrations up to 600 mg/L, the bioreactor exhibited high aniline removal efficiency (almost 100 %). Comamonas, Zoogloea, and Delftia played crucial roles in removing aniline and microbial beta diversity changed. Additionally, alpha diversity and network complexity decreased with increasing aniline concentration, but these metrics recovered to their original levels when the aniline concentration was returned to 200 mg/L. Homogeneous and heterogeneous selection dominated microbial community assembly. Therefore, according to the observed variations in community structure and the recovery of keystones after aniline stress, microbial community redundancy and resilience are pivotal for ensuring system stability. Overall, this study provides valuable insights into the redundancy and resilience of microbial communities under aniline stress and establishes a scientific basis for managing and evaluating wastewater treatment plants.
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Affiliation(s)
- Hui Chen
- Institute of Zhejiang University - Quzhou, Quzhou 32400, China; Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lecheng Lei
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhongjian Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hongbo Zhou
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Haina Cheng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Zhu Chen
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Yangyang Wang
- National Demonstration Center for Environmental and Planning, College of Geography and Environmental Science, Henan University, Kaifeng 475004, China
| | - Yuguang Wang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China.
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El Mersly L, El Mouchtari EM, Moujahid EM, Briche S, Alaoui Tahiri A, Forano C, Prévot V, Rafqah S. Enhanced photocatalytic activity of hydrozincite-TiO 2 nanocomposite by copper for removal of pharmaceutical pollutant mefenamic acid in aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:24575-24589. [PMID: 36342608 DOI: 10.1007/s11356-022-23832-w] [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: 08/22/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
Nanocomposites based on hydrozincite-TiO2 and copper-doped HZ-xCu-TiO2 (x = 0.1; 0.25; 0.35) were synthesized in a single step using the urea method. The samples were characterized by XRD, FTIR, SEM/TEM, and DRS. The study of adsorption capacity and photocatalytic efficiency of these nanocomposites have been tested on a pharmaceutical pollutant, mefenamic acid (MFA). Kinetic study of removal of MFA indicates that this pollutant was adsorbed on the surface of the synthesized phases, according to Langmuir's model. Such adsorption proved to be well adapted in a kinetic pseudo-second-order model with capacity of 13.08 mg/g for HZ-0.25Cu-TiO2. Subsequently, the kinetics of photocatalytic degradation under UV-visible irradiation was studied according to several parameters, which allowed us to optimize our experimental conditions. The nanocomposite HZ-0.25Cu-TiO2 showed significant removal efficiency of MFA. Elimination rate reached 100% after 20 min under UV-vis irradiation, and 77% after 7 h under visible light irradiation. Repeatability tests have shown that this nanocomposite is extremely stable after six photocatalytic cycles. By-products of MFA were detected by LC/MS. These photoproducts was produced by three types of reactions of hydroxylation: cyclization and cleavage of the aromatic ring. MFA underwent complete mineralization after 22 h of irradiation in the presence of the HZ-0.25Cu-TiO2.
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Affiliation(s)
- Lekbira El Mersly
- Laboratoire de Chimie Analytique et Moléculaire, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco
| | - El Mountassir El Mouchtari
- Laboratoire de Chimie Analytique et Moléculaire, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco
| | - El Mostafa Moujahid
- Laboratoire Physico-Chimie Des Matériaux, Faculté Des Sciences, Université Chouaib Doukkali, EL Jadida, Morocco
| | - Samir Briche
- Département Stockage de L'Energie Et Revêtements Multifonctionnels (SERM), MAScIR Foundation, Rabat, Morocco
| | - Abdelaaziz Alaoui Tahiri
- Laboratoire de Chimie Analytique et Moléculaire, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco
| | - Claude Forano
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, ICCF, 63000, Clermont-Ferrand, France
| | - Vanessa Prévot
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, ICCF, 63000, Clermont-Ferrand, France
| | - Salah Rafqah
- Laboratoire de Chimie Analytique et Moléculaire, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco.
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Kinetics and Mechanism of Aniline and Chloroanilines Degradation Photocatalyzed by Halloysite-TiO2 and Halloysite-Fe2O3 Nanocomposites. Catalysts 2021. [DOI: 10.3390/catal11121548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The kinetics of photocatalytic degradation of aniline, 2-chloroaniline, and 2,6-dichloroaniline in the presence of halloysite-TiO2 and halloysite-Fe2O3 nanocomposites, halloysite containing naturally dispersed TiO2, Fe2O3, commercial TiO2, P25, and α-Fe2O3 photocatalysts, were investigated with two approaches: the Langmuir–Hinshelwood and first-order equations. Adsorption equilibrium constants and adsorption enthalpies, photodegradation rate constants, and activation energies for photocatalytic degradation were calculated for all studied amines photodegradation. The photodegradation mechanism was proposed according to organic intermediates identified by mass spectrometry and electrophoresis methods. Based on experimental results, it can be concluded that after 300 min of irradiation, aniline, 2-chloro-, and 2,6-dichloroaniline were completely degraded in the presence of used photocatalysts. Research results allowed us to conclude that higher adsorption capacity and immobilization of TiO2 and Fe2O3 on the halloysite surface in the case of halloysite-TiO2 and halloysite-Fe2O3 nanocomposites significantly increases photocatalytic activity of these materials in comparison to the commercial photocatalyst: TiO2, Fe2O3, and P25.
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Briche S, Derqaoui M, Belaiche M, El Mouchtari EM, Wong-Wah-Chung P, Rafqah S. Nanocomposite material from TiO 2 and activated carbon for the removal of pharmaceutical product sulfamethazine by combined adsorption/photocatalysis in aqueous media. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:25523-25534. [PMID: 32347507 DOI: 10.1007/s11356-020-08939-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 04/17/2020] [Indexed: 05/27/2023]
Abstract
This work was dedicated to the elaboration of new composite materials based on activated carbon and titanium oxide as an ecological solution for the cleaning of water contaminated with pharmaceutical pollutants. Such new composite materials allowed the combining of adsorption and photocatalytic process, which allows a cleaning process that is low cost making them promising materials. The functionalization of the surface of activated carbon (AC) by TiO2 nanoparticles forms the core of the nanocomposite material. This was accomplished using sol-gel process with molar ratios Rn (nTi/nAC) in the range of 1/10 to 7/10 followed by a calcination step (400 °C, N2, 2 h). Using various characterization techniques, AC surface functionalization was confirmed and the formation of a TiO2 coating on the AC was noticed with TiO2 under its unique anatase crystallographic form. The study of adsorption and photocatalytic degradation of the sulfamethazine antibiotic demonstrated that the most photoactive nanocomposite corresponds to the one with Rn = 0.5. Freundlich model was proved to be a perfect fit with the experimental results stating that the adsorption is of multilayer nature on the surface of the adsorbent and with interactions between the pollutants adsorbed on its surface. The photocatalytic degradation of the remaining pharmaceutical pollutant in the solution was evidenced and essentially occurred through the involvement of hydroxyl radicals formed by the excitation of the photocatalyst. The formation of the photoproducts analyzed by the LC/MS technique implies the splitting of the sulfonamide bridge, and by the hydroxylation of the aromatic ring and the pyrimidine group.
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Affiliation(s)
- Samir Briche
- Département Stockage de l'Energie et Revêtements Multifonctionnels (SERM), Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Rue Mohamed El Jazouli, Madinat Al Irfane, 10100, Rabat, Morocco
| | - Mohammed Derqaoui
- Département Stockage de l'Energie et Revêtements Multifonctionnels (SERM), Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Rue Mohamed El Jazouli, Madinat Al Irfane, 10100, Rabat, Morocco
- Laboratoire de Chimie Analytique et Moléculaire (LCAM), Département de Chimie, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco
| | - Mohammed Belaiche
- Département Stockage de l'Energie et Revêtements Multifonctionnels (SERM), Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Rue Mohamed El Jazouli, Madinat Al Irfane, 10100, Rabat, Morocco
| | - El Mountassir El Mouchtari
- Laboratoire de Chimie Analytique et Moléculaire (LCAM), Département de Chimie, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco
| | - Pascal Wong-Wah-Chung
- Aix Marseille Université, CNRS, LCE, UMR 7376, 13545, Aix en Provence Cedex 4, France
| | - Salah Rafqah
- Laboratoire de Chimie Analytique et Moléculaire (LCAM), Département de Chimie, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco.
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Hu D, Zhao Y, Wang H, Min H, Cui Y, Luo K, Zhang L, Liu W, Zhang Y. Multiple draft tubes airlift loop membrane bioreactor as an efficient system for acidic 7-amino cephalosporanic acid (7-ACA) wastewater treatment. BIORESOURCE TECHNOLOGY 2020; 304:123014. [PMID: 32088628 DOI: 10.1016/j.biortech.2020.123014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 02/08/2020] [Accepted: 02/11/2020] [Indexed: 06/10/2023]
Abstract
In this study, a lab-scale multiple draft tubes airlift loop membrane bioreactor (Mt-ALMBR) was used for treating acidic 7-amino cephalosporanic acid (7-ACA) wastewater under different pHs (3.54-6.20) and hydraulic retention time (HRT) (48 h, 36 h, 24 h and 16 h). During about 200 days operation, under HRT of 48 h and pH condition about 6.0, the optimum average COD and BOD5 removal rates were reach to 84.4 ± 2.1% and 94.9 ± 0.8%, and the highest 7-ACA removal rate also observed as 77.6%. Biodegradation, membrane rejection, hydrolysis and sludge adsorption were the four main pathways of 7-ACA removal. With the increase of pH, biodegradation, membrane rejection and hydrolysis had significant positive impacts on 7-ACA removal, while adsorption had a negative impact. Moreover, mathematical models for 7-ACA removal rate and pH were calculated to guide the operation of Mt-ALMBR. Biodegradation was the main pathway to remove 7-ACA when pH was >4.17.
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Affiliation(s)
- Dongxue Hu
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, PR China; College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, PR China
| | - Yuanyi Zhao
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, PR China; College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, PR China
| | - Hongcheng Wang
- School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, PR China.
| | - Hongchao Min
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, PR China; College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, PR China
| | - Yubo Cui
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, PR China; College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, PR China
| | - Kongyan Luo
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, PR China; College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, PR China
| | - Lufeng Zhang
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, PR China; College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, PR China
| | - Wenyu Liu
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, PR China; College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, PR China
| | - Ying Zhang
- School of Resources and Environmental Science, Northeast Agricultural University, 59 Mucai Street, HarBin 150030, PR China
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El Mouchtari EM, Daou C, Rafqah S, Najjar F, Anane H, Piram A, Hamade A, Briche S, Wong-Wah-Chung P. TiO2 and activated carbon of Argania Spinosa tree nutshells composites for the adsorption photocatalysis removal of pharmaceuticals from aqueous solution. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112183] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Tu D, Liao H, Deng Q, Liu X, Shang R, Zhang X. Renewable Biomass‐Derived Hierarchically Porous Carbonaceous Sponge (CS)/g‐C
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Composites as Adsorption and Photocatalytic Materials. ChemistrySelect 2019. [DOI: 10.1002/slct.201803767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dan Tu
- School of materials science and engineeringSouthwest University of Science and Technology Mianyang 621010 China
| | - Huiwei Liao
- School of materials science and engineeringSouthwest University of Science and Technology Mianyang 621010 China
| | - Qiulin Deng
- School of materials science and engineeringSouthwest University of Science and Technology Mianyang 621010 China
- Jiangsu Provincial Key Laboratory of PalygorskiteScience and Applied TechnologyHuaiyin Institute of Technology Huaian 223003 China
| | - Xiang Liu
- School of materials science and engineeringSouthwest University of Science and Technology Mianyang 621010 China
| | - Ronggang Shang
- School of materials science and engineeringSouthwest University of Science and Technology Mianyang 621010 China
| | - Xiaoyong Zhang
- School of materials science and engineeringSouthwest University of Science and Technology Mianyang 621010 China
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Liu S, Dai W, Zhang L, Cheng M, Du Y, Zhu Q. Structure and vibrations of 2-fluoro-N-methylaniline in the S0, S1 and D0 states: REMPI and MATI spectroscopy and theoretical calculations. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.05.101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Photocatalytic degradation of Aniline from aqueous solutions under sunlight illumination using immobilized Cr:ZnO nanoparticles. Sci Rep 2017; 7:1473. [PMID: 28469186 PMCID: PMC5431250 DOI: 10.1038/s41598-017-01461-5] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 03/28/2017] [Indexed: 11/16/2022] Open
Abstract
The present study aimed at synthesizing chromium doped zinc oxide nanoparticles (Cr:ZnO NPs) under mild hydrothermal conditions (temperature ~100 °C, p = autogenous and time ~12 hr). Chromium oxide and n-butylamine were used as dopant and surface modifier, respectively. The characteristics of the synthesized nanoparticles were determined through conducting specialized experiments including powder XRD, FTIR, SEM, EDX, and UV-VIS spectroscopy. Then, the Cr:ZnO NPs were immobilized on a sandblasted glass through thermal method. The photocatalytic degradation of aniline was conducted in a continuous reactor with a volume of 1.5 liters. Before and after photocatalytic degradation, the immobilized Cr:ZnO NPs were characterized for SEM and EDX to determine the degree of stability of immobilized nanoparticles as well as the influence of the current applied on them. The photodegradation operational parameters investigated were aniline initial concentration (150, 200, and 250 mg/L), pH (5, 7, 6, and 12), and reaction time (2, 4, and 6 hours) under sunlight illumination. The characterization results indicated high purity of the Cr:ZnO NPs and no change in morphology or composition even after the immobilization and photo-oxidation process. Finally, it was found that the optimum conditions for 93% removal of aniline under sunlight illumination was about 6 hours retention time at pH 9.
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Liang Z, Shi W, Zhao Z, Sun T, Cui F. Enhanced removal and adsorption characters of aniline by the inorganically modified mesoporous silica nano-spheres. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.10.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zavareh S, Avanes A, Beiramyan P. Effective and selective removal of aromatic amines from water by Cu2+-treated chitosan/alumina nanocomposite. ADSORPT SCI TECHNOL 2016. [DOI: 10.1177/0263617416674216] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- Siamak Zavareh
- Department of Applied Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran
| | - Armen Avanes
- Department of Applied Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran
| | - Parizad Beiramyan
- Department of Material Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran
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Bafana A, Kumar G, Kashyap SM, Kanade GS, Shinde VM. Dynamics of effluent treatment plant during commissioning of activated sludge process unit. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:3538-3546. [PMID: 25249053 DOI: 10.1007/s11356-014-3597-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Accepted: 09/11/2014] [Indexed: 06/03/2023]
Abstract
Industrial effluent treatment plants (ETPs) are very important in protecting the environment and different life forms from harmful industrial waste. Hence, the efficiency of ETPs must be regularly monitored, particularly after major repair or replacement work. Present study evaluated the performance of an ETP over a period of 4 months, during which aeration tank (T1) of the activated sludge unit was replaced with a new one (T2). System had to be maintained operational during this transition, which warranted close monitoring of the system performance due to the daily load of hazardous industrial wastewater. Analysis showed that the raw wastewater was highly variable in composition and contained many hazardous organic and inorganic pollutants, such as heavy metals, bisphenol A and cyanoacetylurea. It showed significant toxicity against HepG2 cells in vitro. However, the ETP was found to successfully treat and detoxify the wastewater. Denaturing gradient gel electrophoresis (DGGE) analysis showed large temporal fluctuations in the ETP microbial community, which is consistent with the variable composition of wastewater. It indicated that functional stability of the ETP was not associated with stability of the microbial community, probably due to high microbial biodiversity and consequently high functional redundancy. In conclusion, the CETP showed consistent level of detoxification and microbial community dynamics after switching to T2, indicating successful development, acclimatization and commissioning of T2.
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Affiliation(s)
- Amit Bafana
- CSIR-NEERI (National Environmental Engineering Research Institute), Environmental Health Division, Nagpur, 440 020, India,
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Atac A, Karaca C, Gunnaz S, Karabacak M. Vibrational (FT-IR and FT-Raman), electronic (UV-Vis), NMR (1H and 13C) spectra and reactivity analyses of 4,5-dimethyl-o-phenylenediamine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 130:516-525. [PMID: 24813280 DOI: 10.1016/j.saa.2014.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 03/26/2014] [Accepted: 04/04/2014] [Indexed: 06/03/2023]
Abstract
The structure of 4,5-dimethyl-o-phenylenediamine (C8H12N2, DMPDA) was investigated on the basis of spectroscopic data and theoretical calculations. The sterochemical structure was determined by FT-IR, FT-Raman, UV, 1H and 13C NMR spectra. An experimental study and a theoretical analysis were associated by using the B3LYP method with Gaussian09 package program. FT-IR and FT-Raman spectra were recorded in the region of 4000-400 cm(-1) and 4000-10 cm(-1), respectively. The vibrational spectra were calculated by DFT method and the fundamental vibrations were assigned on the basis of the total energy distribution (TED), calculated with scaled quantum mechanics (SQM) method with Parallel Quantum Solutions (PQS) program. The UV absorption spectrum of the compound that dissolved in ethanol solution were recorded in the range of 190-400 nm. Total density of state (TDOS) and partial density of state (PDOS) of the DMPDA in terms of HOMOs and LUMOs were calculated and analyzed. Chemical shifts were reported in ppm relative to tetramethylsilane (TMS) for 1H and 13C NMR spectra. The compound was dissolved in dimethyl sulfoxide (DMSO). Also, 1H and 13C chemical shifts calculated using the gauge independent atomic orbital (GIAO) method. Mullikan atomic charges and other thermo-dynamical parameters were investigated with the help of B3LYP (DFT) method using 6-311++G** basis set. On the basis of the thermodynamic properties of the title compound at different temperatures have been carried out, revealing the correlations between heat capacity (C), entropy (S), enthalpy changes (H) and temperatures. The optimized bond lengths, bond angles, chemical shifts and vibrational wavenumbers showed the best agreement with the experimental results.
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Affiliation(s)
- Ahmet Atac
- Department of Physics, Celal Bayar University, Manisa, Turkey
| | - Caglar Karaca
- Department of Physics, Celal Bayar University, Manisa, Turkey
| | - Salih Gunnaz
- Department of Chemistry, Ege University, Izmir, Turkey
| | - Mehmet Karabacak
- Department of Mechatronics Engineering, H.F.T. Technology Faculty, Celal Bayar University, Turgutlu, Manisa, Turkey.
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Kakavandi B, Jonidi A, Rezaei R, Nasseri S, Ameri A, Esrafily A. Synthesis and properties of Fe3O4-activated carbon magnetic nanoparticles for removal of aniline from aqueous solution: equilibrium, kinetic and thermodynamic studies. IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2013; 10:19. [PMID: 23414171 PMCID: PMC3606349 DOI: 10.1186/1735-2746-10-19] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 01/13/2013] [Indexed: 11/30/2022]
Abstract
In this study, powder activated carbon (PAC) and magnetic nanoparticles of iron (III) oxide were used for synthesis of Fe3O4-activated carbon magnetic nanoparticles (AC-Fe3O4 MNPs) as an adsorbent for the removal of aniline. The characteristics of adsorbent were evaluated by SEM, TEM, XRD and BET. Also, the impact of different parameters such as pH, contact time, adsorbent dosage, aniline initials concentration and solution temperature were studied. The experimental data investigated by Langmuir and Freundlich adsorption isotherms and two models kinetically of pseudo first-order and pseudo second-order. The results indicated that the adsorption followed Langmuir and pseudo second-order models with correlation r2 > 0.98 and r2 > 0.99, respectively. The equilibrium time was obtained after 5 h. According to Langmuir model, the maximum adsorption capacity was 90.91 mg/g at pH = 6, and 20°C. The thermodynamic parameters indicated that adsorption of aniline on magnetic activated carbon was exothermic and spontaneous. This synthesized AC-Fe3O4 MNPs due to have advantages such as easy and rapid separation from solution could be applied as an adsorbent effective for removal of pollutants such as aniline from water and wastewater.
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Affiliation(s)
- Babak Kakavandi
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmad Jonidi
- Faculty of Medical sciences, Faculty of Medical sciences, Tarbiat Modares University, Tehran, Iran
| | - Roshanak Rezaei
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran ; Center for Water Quality Research (CWOR), Intitute for Environmental Research (IER), Tehran, University of Medical Sciences, Tehran, Iran
| | - Simin Nasseri
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran ; Center for Water Quality Research (CWOR), Intitute for Environmental Research (IER), Tehran, University of Medical Sciences, Tehran, Iran
| | - Ahmad Ameri
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Esrafily
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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15
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Chang CS, Yen JH, Chen WC, Wang YS. Soil dissipation of juvenile hormone analog insecticide pyriproxyfen and its effect on the bacterial community. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2012; 47:13-21. [PMID: 22022784 DOI: 10.1080/03601234.2012.601944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This investigation was undertaken to examine the dissipation rate of pyriproxyfen as well as the change in the soil bacterial community. Residues of pyriproxyfen were measured using high performance liquid chromatography (HPLC) and the changes in bacterial community were determined by comparing the 16S rDNA bands on patterns by denaturing gradient gel electrophoresis (DGGE). The dissipation of pyriproxyfen was affected by both the concentration applied and incubation temperature. Lower concentrations (1 mg Kg(-1)) and higher incubation temperatures (30 and 40°C) showed more rapid dissipation rates. The population of microbial community decreased rapidly after incubation with 10 mg Kg(-1) of pyriproxyfen for 91 days, indicating the toxicity of pyriproxyfen toward bacterial communities in a closed soil ecosystem. Lower concentrations of pyriproxyfen showed less toxicity toward the microbial community. From cluster analysis, the structure of the bacterial community showed roughly a 60 % similarity throughout the experiment period in the control experiment, indicating the stability within soil microbiota without chemical agitation. However, the similarity was lower than 50 % both in the one and 10 mg Kg(-1) of insecticide pyriproxyfen spiked experiment, indicating the soil bacterial community changed after the insecticide pyriproxyfen was applied.
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Affiliation(s)
- Ching S Chang
- Department of Agricultural Chemistry, National Taiwan University, Taipei
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16
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Li J, Jin Z, Gu Q. Effect of plant species on the function and structure of the bacterial community in the rhizosphere of lead–zinc mine tailings in Zhejiang, China. Can J Microbiol 2011; 57:569-77. [DOI: 10.1139/w11-054] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To uncover the role played by pioneer plants in the natural succession of vegetation on heavy-metal mine tailings, it is important to explore the sensitive indicator of rhizosphere microbial community performance. We investigated the structure and function of rhizosphere bacterial communities of five pioneer plants growing on lead–zinc mine tailings in Zhejiang, China. Compared with the control, all five pioneer plants differentially affected the structure and function of rhizosphere bacterial communities. The number of bacteria, the activity of β-glucosidase and urease, and species richness indices were the highest in the rhizosphere of Erigeron annuus . The carbon utilization ability and the functional diversity indices were the highest in the rhizosphere of Lysimachia clethroides . There was no significant relationship between the functional or structural diversity indices and the bioavailable heavy-metal content among each species. Clustering analysis and the nonmetric dimensional scaling biplot showed that the rhizosphere bacterial communities of the five pioneer plants were different from those of control, indicating that plant species might be the main driver of microbial community composition on mine tailings. Both L. clethroides and E. annuus might be appropriate candidates for phytoremediation of mine tailings for higher soil microbial community function and species richness in rhizosphere.
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Affiliation(s)
- Junmin Li
- Institute of Ecology, Taizhou University, 605 Dongfang Dadao, Linhai 317000, People’s Republic of China
| | - Zexin Jin
- Institute of Ecology, Taizhou University, 605 Dongfang Dadao, Linhai 317000, People’s Republic of China
| | - Qiping Gu
- Institute of Ecology, Taizhou University, 605 Dongfang Dadao, Linhai 317000, People’s Republic of China
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17
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Wu S, Yue Q, Qi Y, Gao B, Han S, Yue M. Preparation of ultra-lightweight sludge ceramics (ULSC) and application for pharmaceutical advanced wastewater treatment in a biological aerobic filter (BAF). BIORESOURCE TECHNOLOGY 2011; 102:2296-2300. [PMID: 21055922 DOI: 10.1016/j.biortech.2010.10.057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Revised: 10/11/2010] [Accepted: 10/13/2010] [Indexed: 05/30/2023]
Abstract
Novel media-ultra-lightweight sludge ceramics (ULSC) employed in an upflow lab-scale biological aerobic filter (BAF) were investigated for pharmaceutical advanced wastewater treatment. The influences of the volume ratio of pharmaceutical wastewater to domestic wastewater (PW/DW), hydraulic retention time (HRT) and air-liquid ratio (A/L) on chemical oxygen demand (CODCr) and ammonium (NH(4)(+)-N) of the effluent were investigated. When PW/DW of 4:1, HRT of 6 h, and A/L of 5:1 were applied, the mean effluent concentration of NH(4)(+)-N was 6.2 mg L(-1), and the maximum CODCr concentration in the effluent was 96 mg L(-1). Both NH(4)(+)-N and CODCr did not exceed the limits of the national discharge standards (NH(4)(+)-N ≤ 15 mg L(-1), CODCr ≤ 100 mg L(-1)). In addition, the BAF system showed a strong capacity of further removal from NH(4)(+)-N of the effluent.
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Affiliation(s)
- Suqing Wu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, China
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18
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Yan H, Yang X, Chen J, Yin C, Xiao C, Chen H. Synergistic removal of aniline by carbon nanotubes and the enzymes of Delftia sp. XYJ6. J Environ Sci (China) 2011; 23:1165-1170. [PMID: 22125910 DOI: 10.1016/s1001-0742(10)60531-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Synergistic removal of aniline by carbon nanotubes and the enzymes of Delftia sp. XYJ6, a newly isolated bacterial strain for biodegrading aniline, was investigated. It showed that biodegradation rate of aniline was increased with the augment of protein concentration in cell-free extract of Delftia sp. XYJ6. The adsorption amount of aniline by multi-walled carbon nanotubes (MWCNTs) was slightly higher than that by single-walled carbon nanotubes (SWCNTs), however the adsorption amount of protein of Delftia sp. XYJ6 by MWCNTs was lower than that by SWCNTs. Much more amount of aniline could be removed by CE of Delftia sp. XYJ6 in the presence of SWCNTs than MWCNTs, which indicated that an efficient reaction between aniline and enzymes of Delftia sp. XYJ6 on the surface of SWCNTs played a key role in the rapid enzymatic biodegradation of aniline. This study is not previously reported and may be useful in basic research and the removal of aniline from wastewater.
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Affiliation(s)
- Hai Yan
- School of Chemical and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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19
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Li J, Jin Z, Yu B. Changes in the structure and diversity of bacterial communities during the process of adaptation to organic wastewater. Can J Microbiol 2010; 56:352-5. [DOI: 10.1139/w10-009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To explore changes in the structure and diversity of activated sludge-derived microbial communities during adaptation to gradual increases in the concentration of wastewater, RAPD–PCR and the combination of PCR amplification of 16S rRNA genes with denaturing gradient gel electrophoresis (DGGE) analysis were used. In bacterial communities exposed to 0%, 5%, 10%, 20%, or 40% wastewater, there were 27, 25, 18, 17 and 16 bands, respectively, based on DGGE data, while there were 69, 83, 97, 86, and 88 bands, respectively, based on RAPD data. The community similarity index among bacterial communities during the process of adaptation to different concentrations of wastewater was different based on DGGE and RAPD data. Based on DGGE and RAPD profiles, the Shannon–Weiner and Simpson’s diversity indices decreased sharply upon exposure to 10% wastewater, indicating that 10% wastewater might be a critical point at which the growth of bacteria could be significantly inhibited and the genotypic diversity could change. This indicated that changes in structure and diversity might have an inhibitory effect on the toxicity of organic matter and that selection and adaptation could play important roles in the changes.
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Affiliation(s)
- Junmin Li
- Institute of Ecology, Taizhou University, Dongfang Road 605, Linhai City, Zheijang Province 317000, P.R. China
| | - Zexin Jin
- Institute of Ecology, Taizhou University, Dongfang Road 605, Linhai City, Zheijang Province 317000, P.R. China
| | - Binbin Yu
- Institute of Ecology, Taizhou University, Dongfang Road 605, Linhai City, Zheijang Province 317000, P.R. China
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