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Patel Y, Gupte A. Accelerated biodecolorization and detoxification of synthetic textile dye Acid Maroon V by bacterial consortium under redox mediator system. 3 Biotech 2023; 13:51. [PMID: 36685318 PMCID: PMC9845506 DOI: 10.1007/s13205-023-03466-6] [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: 08/23/2022] [Accepted: 01/03/2023] [Indexed: 01/18/2023] Open
Abstract
The treatment of textile industrial wastewater is an important concern owing to its negative impact on the biosphere. The present study highlighted dye decolorization potential of bacterial consortium EDPA containing Enterobacter dissolvens AGYP1 and Pseudomonas aeruginosa AGYP2 in the presence of redox mediators. Rapid decolorization of Acid Maroon V (100 mg l-1) was achieved in the presence of lawsone compared to other redox mediators. The dye decolorization was best fitted with first order kinetics with higher reaction kinetics (k1 = 0.328 h-1) and regression coefficient (R2 = 0.979). The removal of dye by the consortium was 1.47 times faster in 8 h with 0.01 mM lawsone. The consortium EDPA was able to decolorize 1200 mg l-1 concentration of dye with apparent R max , K m and R max /K m values 1000 mg l-1 h-1, 5000 mg l-1 and 0.2 h-1, respectively. The lawsone-mediated system could decolorize the dye 80.44% in 10 h at the end of 11 dye spiking cycle. The superior biodecolorization of 14 different textile dyes was obtained in the presence of lawsone-mediated system. The intracellular enzyme activities of azoreductase, NADH-DCIP reductase, laccase, manganese peroxidase and lignin peroxidase increased significantly. The sequential microaerophilic-aerobic incubation resulted into 89.31% reduction of total aromatic amines. The microbial toxicity, phytotoxicity and genotoxicity measurements revealed biotransformation of toxic nature of dye Acid Maroon V into non-toxic metabolites by the action of consortium EDPA, and thus its suitability for biotreatment of dye containing industrial effluents. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-023-03466-6.
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Affiliation(s)
- Yogesh Patel
- Department of Microbiology, College of Basic Science and Humanities (CBSH), Sardarkrushinagar Dantiwada Agricultural University (SDAU), Sardarkrushinagar, 385506 Gujarat India
| | - Akshaya Gupte
- Department of Microbiology, Natubhai V. Patel College of Pure and Applied Sciences, Vallabh Vidyanagar, 388120 Anand, Gujarat India
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Immobilization of Horseradish Peroxidase on Magnetite-Alginate Beads to Enable Effective Strong Binding and Enzyme Recycling during Anthraquinone Dyes’ Degradation. Polymers (Basel) 2022; 14:polym14132614. [PMID: 35808660 PMCID: PMC9269335 DOI: 10.3390/polym14132614] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/14/2022] [Accepted: 06/14/2022] [Indexed: 02/06/2023] Open
Abstract
The aim of this study was to investigate covalent immobilization of horseradish peroxidase (HRP) on magnetic nanoparticles (Mag) encapsulated in calcium alginate beads (MABs) for color degradation, combining easy and fast removal of biocatalyst from the reaction mixture due to its magnetic properties and strong binding due to surface alginate functional groups. MABs obtained by extrusion techniques were analyzed by optical microscopy, FEG-SEM and characterized regarding mechanical properties, magnetization and HRP binding. HRP with initial concentration of 10 mg/gcarrier was successfully covalently bonded on MABs (diameter ~1 mm, magnetite/alginate ratio 1:4), with protein loading of 8.9 mg/gcarrier, immobilization yield 96.9% and activity 32.8 U/g. Immobilized HRP on MABs (HRP-MABs) was then used to catalyze degradation of two anthraquinonic dyes, Acid Blue 225 (AB225) and Acid Violet 109 (AV109), as models for wastewater pollutants. HRP-MABs decolorized 77.3% and 76.1% of AV109 and AB225, respectively after 15 min under optimal conditions (0.097 mM H2O2, 200 mg of HRP-MABs (8.9 mg/gcarrier), 0.08 and 0.1 g/mg beads/dye ratio for AV109 and AB225, respectively). Biocatalyst was used for 7 repeated cycles retaining 75% and 51% of initial activity for AB225 and AV109, respectively, showing potential for use in large scale applications for colored wastewater treatment.
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Oztekin A, Almaz Z, Onlu S. Production and purification of peroxidases from callus cultures of white and red cabbage for enzymatic decolourization of reactive blue 19 and acid blue 25 dyes. BIOCATAL BIOTRANSFOR 2021. [DOI: 10.1080/10242422.2021.1906659] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Aykut Oztekin
- Department of Medical Services and Techniques, Vocational School of Health Services, Agri Ibrahim Cecen University, Agri, Turkey
| | - Zuleyha Almaz
- Molecular Biology and Genetics Department, Faculty of Science and Literature, Mus Alparslan University, Mus, Turkey
| | - Seyma Onlu
- Molecular Biology and Genetics Department, Faculty of Science and Literature, Mus Alparslan University, Mus, Turkey
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Aksoy M, Öztekin A. Using of group-based selected flavonoids as alternative inhibitors for potato polyphenol oxidase. J Food Biochem 2021; 45:e13700. [PMID: 33687091 DOI: 10.1111/jfbc.13700] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 11/30/2022]
Abstract
One of the main problems encountered after fresh-cutting of foods is enzymatic browning causing changes in the texture, taste, and color. The variety of physical and chemical-based antibrowning methods was applied to extend the shelf life of these products. Accordingly, methods using natural compounds are of great importance for health. In this study, it was aimed to prevent enzymatic browning in potato (Solanum tuberosum L. cv. Marfona) by limiting the polyphenol oxidase (PPO) activity with selected flavonoids. First of all, we purified the potato PPO (pPPO) by single-step affinity chromatography. Sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and native PAGE were applied on pPPO. Then, the inhibition effects of 7-hydroxyflavone, 7-hydroxy-4'-nitroisoflavone, myricetin, luteolin, 7-methoxyflavone, 6-fluoroflavone, diosmetin, rutin, and diosmin on purified PPO enzyme were investigated. Kinetic assays indicated that myricetin was a remarkable inhibitor with the Ki value of 5 µM on pPPO. PRACTICAL APPLICATIONS: Potatoes are one of the important diet in many countries. In the processing of potatoes, enzymatic oxidation catalyzed by polyphenol oxidases (PPOs) is lead to losing its taste, flavor, and color. In this current paper, group-based selected flavonoids were proposed as alternative inhibitors of potato PPO enzyme. These flavonoids allowing to limit the PPO activity are commercially available, and they can be potential candidates to be used as antibrowning agents during potato processing.
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Affiliation(s)
- Mine Aksoy
- Faculty of Science, Department of Chemistry, Atatürk University, Erzurum, Turkey
| | - Aykut Öztekin
- Medical Services and Techniques Department, Vocational School of Health Services, Agri Ibrahim Cecen University, Agri, Turkey
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Chao HJ, Xue D, Jiang W, Li D, Hu Z, Kang J, Liu D. A low-voltage pulse electrolysis method for the degradation of anthraquinone and azo dyes in chloride medium by anodic oxidation on Ti/IrO 2 -RuO 2 -SnO 2 electrodes. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2020; 92:779-788. [PMID: 31697421 DOI: 10.1002/wer.1270] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/31/2019] [Accepted: 11/01/2019] [Indexed: 06/10/2023]
Abstract
Wastewater produced by the textile industry containing azo dyes and anthraquinone dyes is significant source of pollution to the environment and is toxic for aquatic life. To overcome the high-energy cost of traditional electrochemical oxidation, a custom-built power supply device for the degradation of anthraquinone and azo dyes by low voltage of 15.0-20.0 V pulsed discharge was investigated. Titanium coated with mixed oxide (Ti/IrO2 -RuO2 -SnO2 ) plates and pure titanium plates were used as the anode and cathode, respectively, for the generation of chlorine in the dye solution. For the anthraquinone dye Reactive Blue 19, 60.0% of the chemical oxygen demand (COD) and 22.0% of the total organic carbon (TOC) were removed using this system. A comparison of the direct current electrolysis and pulsed discharge revealed that using the pulsed discharge method reduced the energy cost by 68.6%. UV-visible, LC-MS, and GC-MS were used to identify the intermediate compounds formed during the degradation of Reactive Blue 19. The results indicate that in the process of oxidation by chlorine/hypochlorite, the chromophore group was first oxidized to -NH2 , followed by decolorization via chlorination of the aromatic rings. The results confirm that low-voltage pulse electrolysis can be used for the degradation of industrial dyes in waste effluents. PRACTITIONER POINTS: Low-voltage pulse electrolysis can be used for the degradation of industrial dyes and/or dyes in waste effluents. For anionic dye Reactive Blue 19, 60.0% of COD and 22.0% of TOC were removed using low-voltage (20.0 V) pulse electrolysis. The pulsed discharge method reduced the energy cost of this degradation process by 68.6% compared with direct current electrolysis. The intermediate compounds formed during the degradation of Reactive Blue 19 were confirmed by UV-visible spectroscopy, LC-MS, and GC-MS.
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Affiliation(s)
- Hong-Jun Chao
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, China
| | - Dan Xue
- Department of Environmental Engineering, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
- GanSu Jingwei Environmental Engineering Technology Co,Ltd., Lanzhou, China
| | - Wei Jiang
- Department of Municipal Engineering, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Daosheng Li
- Department of Environmental Engineering, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Zhiquan Hu
- Department of Environmental Engineering, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Jianxiong Kang
- Department of Environmental Engineering, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Dongqi Liu
- Department of Environmental Engineering, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
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Maleš L, Fakin D, Bračič M, Gorgieva S. Efficiency of Differently Processed Membranes Based on Cellulose as Cationic Dye Adsorbents. NANOMATERIALS 2020; 10:nano10040642. [PMID: 32235489 PMCID: PMC7221949 DOI: 10.3390/nano10040642] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 03/24/2020] [Accepted: 03/26/2020] [Indexed: 01/16/2023]
Abstract
In order to minimize the pollution caused by the reuse of textile dyes, technologies and materials have been developed that purify waste water in an efficient and cost-effective manner before it is discharged into a water body. In this context, the presented research investigates the potential of two types of fully cellulose-based membranes as adsorbents for cationic dyes used in the textile industry. The first type combines cellulose nanofibrils (CNFs) and carboxymethylated cellulose (CMC) using the solvent casting process and an esterification coupling reaction, while the second type uses commercial bacterial cellulose (BC) in a native and sodium periodate-treated form (BCox). The corresponding membranes were comprehensively evaluated by means of Fourier Transform Infrared (FTIR) Spectroscopy. Results confirm the esterification process within the CNF/CMC membranes, as well as BC oxidation after periodate treatment, as shown by bands at 1726.2 cm−1 and 895 cm−1, respectively. The Potentiometric Titration shows the highest total negative charge of 1.07 mmol/g for 4CNF/4CMC, which is assigned to the presence of COO− within CMC polymers, and lowest (0.21 mmol/g) for BCox. The Contact Angle Goniometry data confirm the hydrophilicity of all membranes, and the angle increased from 0 ° (in pure BC) to 34.5 ° in CMC-rich and to 31.4 ° in BCox membranes due to the presence of CH2COO− and CHO groups, respectively. Confocal Fluorescent Microscopy (CFM) demonstrated the highest µ-roughness in 4CNF/4CMC, while Scanning Electron Microscopy (SEM) depicted diverse morphological features between the membranes, from ultrafine nanofiber networks (in BC and BCox) to larger fiber bundles connected within the polymer phase in CNF/CMC membranes. The adsorption experiment followed by UV–VIS spectroscopy, showed ~100% dye removal efficiency in both CNF/CMC-based membranes, while BC and BCox adsorbed only 24.3% and 23.6%, respectively, when anthraquinone dye was used. Azo dye was only adsorbed with an efficiency of 7–9% on CMC/CNF-based membranes, compared with 5.57% on BC and 7.33% on BCox membranes. The adsorption efficiency at equilibrium was highest for BC (1228 mg/g) and lowest for 7CNF/1CMC (419.24 mg/g) during anthraquinone dye adsorption. In the case of azo dye, the BCox was most effective, with 445.7 mg/g. Applicability of a pseudo second-order model was confirmed for both dyes and all membranes, except for BCox in combination with azo dye, showing the fastest adsorption rate in the case of the 7CNF/1CMC membrane.
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Affiliation(s)
- Laura Maleš
- Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, Smetanova ul. 17, 2000 Maribor, Slovenia; (L.M.); (D.F.); (M.B.)
| | - Darinka Fakin
- Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, Smetanova ul. 17, 2000 Maribor, Slovenia; (L.M.); (D.F.); (M.B.)
| | - Matej Bračič
- Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, Smetanova ul. 17, 2000 Maribor, Slovenia; (L.M.); (D.F.); (M.B.)
| | - Selestina Gorgieva
- Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, Smetanova ul. 17, 2000 Maribor, Slovenia; (L.M.); (D.F.); (M.B.)
- Institute of Automation, Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, 2000 Maribor, Slovenia
- Correspondence: ; Tel.: +38-6222-07924; Fax: +38-6222-07990
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Çifçi Dİ, Atav R, Güneş Y, Güneş E. Determination of the color removal efficiency of laccase enzyme depending on dye class and chromophore. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 80:134-143. [PMID: 31461430 DOI: 10.2166/wst.2019.255] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The aim of this article was to clarify which type of dye chromophores could be decolorized efficiently with the use of laccase enzyme. For this purpose, enzymatic degradation of different type of dye classes (4 reactive, 2 acid and 1 basic dye) having various chromophore groups was investigated by using commercial laccase from Cerrena unicolor. It was observed that the chromophore structure of dye is very important on enzymatic color removal efficiency. According to the experimental results, it was found that color removal efficiencies (20 mg/L initial dye) were 98.7% for RB220 (0.1 g/L enzyme after 6 h), 95.1% for RB19 (0.1 g/L enzyme after 48 h), 90.8% for AR42 (0.1 g/L enzyme after 48 h) while they were 60.9% for AR114 (0.25 g/L enzyme), 58.6% for RB21 (0.5 g/L enzyme), 39.7% for RR239 (0.25 g/L enzyme) even after seven days. As a result, it can be said that the highest decolorization rate was achieved for the reactive dye having formazan copper complex (RB220) chromophore. On the other hand, the enzymatic degradation of basic dye (BB9) was found to be rather difficult compared to the acid and reactive dyes used in this study and the maximum color removal was 42.8% after seven days.
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Affiliation(s)
- Deniz İzlen Çifçi
- Department of Environmental Engineering, Namık Kemal University, Çorlu-Tekirdağ, Turkey E-mail:
| | - Rıza Atav
- Department of Textile Engineering, Namık Kemal University, Çorlu-Tekirdağ, Turkey
| | - Yalçın Güneş
- Department of Environmental Engineering, Namık Kemal University, Çorlu-Tekirdağ, Turkey E-mail:
| | - Elçin Güneş
- Department of Environmental Engineering, Namık Kemal University, Çorlu-Tekirdağ, Turkey E-mail:
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Alneyadi AH, Rauf MA, Ashraf SS. Oxidoreductases for the remediation of organic pollutants in water - a critical review. Crit Rev Biotechnol 2018; 38:971-988. [PMID: 29385838 DOI: 10.1080/07388551.2017.1423275] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Water contamination by various recalcitrant organic aromatic compounds is an emerging environmental issue that is increasingly attracting the attention of environmental scientists. A great majority of these recalcitrant pollutants are industrial wastes, textile dyes, pharmaceuticals, hormones, and personal care products that are discharged into wastewater. Not surprisingly, various chemical, physical, and biological strategies have been proposed and developed to remove and/or degrade these pollutants from contaminated water bodies. Biological approaches, specifically using oxidoreductase enzymes (such as peroxidases and laccases) for pollutant degradation are a relatively new and a promising research area that has potential advantages over other methods due to their higher efficiency and the ease of handling. This review focuses on the application of different classes of oxidoreductase enzymes to degrade various classes of organic pollutants. In addition to classifying these enzymes based on structural differences, the major factors that can affect their remediation ability, such as the class of peroxidases employed, pH, molecular structure of the pollutant, temperature, and the presence of redox mediators are also examined and discussed. Interestingly, a literature survey combined with our unpublished data suggests that "peroxidases" are a very heterogeneous and diverse family of enzymes and have different pH profiles, temperature optima, thermal stabilities, requirements for redox mediators, and substrate specificities as well as varying detoxification abilities. Additionally, remediation of real-life polluted samples by oxidoreductases is also highlighted as well as a critical look at current challenges and future perspectives.
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Affiliation(s)
| | - Muhammad A Rauf
- b Department of Chemistry , College of Science, UAE University , Al-Ain , UAE
| | - S Salman Ashraf
- b Department of Chemistry , College of Science, UAE University , Al-Ain , UAE
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Torres-Farradá G, Manzano León AM, Rineau F, Ledo Alonso LL, Sánchez-López MI, Thijs S, Colpaert J, Ramos-Leal M, Guerra G, Vangronsveld J. Diversity of Ligninolytic Enzymes and Their Genes in Strains of the Genus Ganoderma: Applicable for Biodegradation of Xenobiotic Compounds? Front Microbiol 2017; 8:898. [PMID: 28588565 PMCID: PMC5440474 DOI: 10.3389/fmicb.2017.00898] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 05/03/2017] [Indexed: 11/13/2022] Open
Abstract
White-rot fungi (WRF) and their ligninolytic enzymes (laccases and peroxidases) are considered promising biotechnological tools to remove lignin related Persistent Organic Pollutants from industrial wastewaters and contaminated ecosystems. A high diversity of the genus Ganoderma has been reported in Cuba; in spite of this, the diversity of ligninolytic enzymes and their genes remained unexplored. In this study, 13 native WRF strains were isolated from decayed wood in urban ecosystems in Havana (Cuba). All strains were identified as Ganoderma sp. using a multiplex polymerase chain reaction (PCR)-method based on ITS sequences. All Ganoderma sp. strains produced laccase enzymes at higher levels than non-specific peroxidases. Native-PAGE of extracellular enzymatic extracts revealed a high diversity of laccase isozymes patterns between the strains, suggesting the presence of different amino acid sequences in the laccase enzymes produced by these Ganoderma strains. We determined the diversity of genes encoding laccases and peroxidases using a PCR and cloning approach with basidiomycete-specific primers. Between two and five laccase genes were detected in each strain. In contrast, only one gene encoding manganese peroxidase or versatile peroxidase was detected in each strain. The translated laccases and peroxidases amino acid sequences have not been described before. Extracellular crude enzymatic extracts produced by the Ganoderma UH strains, were able to degrade model chromophoric compounds such as anthraquinone and azo dyes. These findings hold promises for the development of a practical application for the treatment of textile industry wastewaters and also for bioremediation of polluted ecosystems by well-adapted native WRF strains.
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Affiliation(s)
- Giselle Torres-Farradá
- Laboratory of Biotechnology, Department of Microbiology and Virology, Faculty of Biology, University of HavanaHavana, Cuba
| | - Ana M Manzano León
- Department of Phytopathology, Research Institute for Tropical Fruit TreesHavana, Cuba
| | - François Rineau
- Environmental Biology, Centre for Environmental Sciences, Hasselt UniversityHasselt, Belgium
| | - Lucía L Ledo Alonso
- Laboratory of Biotechnology, Department of Microbiology and Virology, Faculty of Biology, University of HavanaHavana, Cuba
| | - María I Sánchez-López
- Laboratory of Biotechnology, Department of Microbiology and Virology, Faculty of Biology, University of HavanaHavana, Cuba
| | - Sofie Thijs
- Environmental Biology, Centre for Environmental Sciences, Hasselt UniversityHasselt, Belgium
| | - Jan Colpaert
- Environmental Biology, Centre for Environmental Sciences, Hasselt UniversityHasselt, Belgium
| | - Miguel Ramos-Leal
- Department of Phytopathology, Research Institute for Tropical Fruit TreesHavana, Cuba
| | - Gilda Guerra
- Laboratory of Biotechnology, Department of Microbiology and Virology, Faculty of Biology, University of HavanaHavana, Cuba
| | - Jaco Vangronsveld
- Environmental Biology, Centre for Environmental Sciences, Hasselt UniversityHasselt, Belgium
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Abiri F, Fallah N, Bonakdarpour B. Sequential anaerobic-aerobic biological treatment of colored wastewaters: case study of a textile dyeing factory wastewater. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 75:1261-1269. [PMID: 28333043 DOI: 10.2166/wst.2016.531] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In the present study the feasibility of the use of a bacterial batch sequential anaerobic-aerobic process, in which activated sludge was used in both parts of the process, for pretreatment of wastewater generated by a textile dyeing factory has been considered. Activated sludge used in the process was obtained from a municipal wastewater treatment plant and adapted to real dyeing wastewater using either an anaerobic-only or an anaerobic-aerobic process over a period of 90 days. The use of activated sludge adapted using the anaerobic-aerobic process resulted in a higher overall decolorization efficiency compared to that achieved with activated sludge adapted using the anaerobic-only cycles. Anaerobic and aerobic periods of around 34 and 22 hours respectively resulted in an effluent with chemical oxygen demand (COD) and color content which met the standards for discharge into the centralized wastewater treatment plant of the industrial estate in which the dyeing factory was situated. Neutralization of the real dyeing wastewater and addition of carbon source to it, both of which results in significant increase in the cost of the bacterial treatment process, was not found to be necessary to achieve the required discharge standards.
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Affiliation(s)
- Fardin Abiri
- Department of Chemical Engineering, Amirkabir University of Technology, 424 Hafez Ave, Tehran, Iran E-mail:
| | - Narges Fallah
- Department of Chemical Engineering, Amirkabir University of Technology, 424 Hafez Ave, Tehran, Iran E-mail:
| | - Babak Bonakdarpour
- Department of Chemical Engineering, Amirkabir University of Technology, 424 Hafez Ave, Tehran, Iran E-mail:
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Immobilization of horseradish peroxidase onto kaolin. Bioprocess Biosyst Eng 2016; 39:461-72. [PMID: 26747440 DOI: 10.1007/s00449-015-1529-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 12/19/2015] [Indexed: 10/22/2022]
Abstract
Kaolin showed as a very perspective carrier for the enzyme immobilization and it was used for the adsorption of horseradish peroxidase (HRP). The effects of the enzyme concentration and pH on the immobilization efficiency were studied in the reaction with pyrogallol and anthraquinone dye C.I. Acid Violet 109 (AV 109). In addition, Fourier transform infrared spectroscopy, scanning electron microscopy and analysis by Brunauer-Emmett-Teller were performed for kaolin, thermally activated kaolin and the immobilized enzyme. It has been shown that 0.1 IU of HRP-kaolin decolorized 87 % of dye solution, under the optimal conditions (pH 5.0, temperature 24 °C, dye concentration 40 mg/L and 0.2 mM of H2O2) within 40 min. The immobilized HRP decolorization follows the Ping Pong Bi-Bi mechanism with dead-end inhibition by the dye. The biocatalyst retained 35 ± 0.9 % of the initial activity after seven cycles of reuse in the decolorization reaction of AV 109 under optimal conditions in a batch reactor. The obtained kinetic parameters and reusability study confirmed improvement in performances of k-HRP compared to free, indicating that k-HRP has a great potential for environmental purposes.
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12
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Yu WB, He QY, Shi HT, Pan Y, Wei X. Water oxidation catalysts and pH sensors based on azo-conjugated iridium/rhodium motifs. Dalton Trans 2014; 43:12221-7. [DOI: 10.1039/c4dt00491d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ionic half-sandwich Ir(iii) and Rh(iii) fragments coordinated by azo compounds exhibit good electrochemical properties, therefore, they can be employed as catalysts in water oxidation. The color of aqueous solutions of these complexes changes from brown to green at pH 12, so they can be used as pH sensors.
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Affiliation(s)
- Wei-Bin Yu
- Analysis and Testing Central Facility
- School of Chemistry and Chemical Engineering
- Anhui University of Technology
- Maanshan 243002, P. R. China
| | - Qing-Ya He
- Analysis and Testing Central Facility
- School of Chemistry and Chemical Engineering
- Anhui University of Technology
- Maanshan 243002, P. R. China
| | - Hua-Tian Shi
- Analysis and Testing Central Facility
- School of Chemistry and Chemical Engineering
- Anhui University of Technology
- Maanshan 243002, P. R. China
| | - Yan Pan
- Analysis and Testing Central Facility
- School of Chemistry and Chemical Engineering
- Anhui University of Technology
- Maanshan 243002, P. R. China
| | - Xianwen Wei
- Analysis and Testing Central Facility
- School of Chemistry and Chemical Engineering
- Anhui University of Technology
- Maanshan 243002, P. R. China
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Catalytic activity of soluble versus immobilized cauliflower (Brassica oleracea) bud peroxidase-concanavalin A complex and its application in dye color removal. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2013. [DOI: 10.1016/j.bcab.2013.05.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Solís A, Perea F, Solís M, Manjarrez N, Pérez HI, Cassani J. Discoloration of indigo carmine using aqueous extracts from vegetables and vegetable residues as enzyme sources. BIOMED RESEARCH INTERNATIONAL 2013; 2013:250305. [PMID: 24151588 PMCID: PMC3787548 DOI: 10.1155/2013/250305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 08/14/2013] [Indexed: 11/18/2022]
Abstract
Several vegetables and vegetable residues were used as sources of enzymes capable to discolor indigo carmine (IC), completely or partially. Complete discoloration was achieved with aqueous extracts of green pea seeds and peels of green pea, cucumber, and kohlrabi, as well as spring onion leaves. The source of polyphenol oxidase (PPO), pH, time, and aeration is fundamental for the discoloration process catalyzed by PPO. The PPO present in the aqueous extract of green pea seeds was able to degrade 3,000 ppm of IC at a pH of 7.6 and magnetic stirring at 1,800 rpm in about 36 h. In addition, at 1,800 rpm and a pH of 7.6, this extract discolored 300 ppm of IC in 1:40 h; in the presence of 10% NaCl, the discoloration was complete in 5:50 h, whereas it was completed in 4:30 h with 5% NaCl and 2% laundry soap.
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Affiliation(s)
- A. Solís
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Xochimilco, Calzada del Hueso 1100, Colonia Villa Quietud, 09460 Coyoacán, DF, Mexico
| | - F. Perea
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Xochimilco, Calzada del Hueso 1100, Colonia Villa Quietud, 09460 Coyoacán, DF, Mexico
| | - M. Solís
- Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional, Ex-Hacienda San Juan Molino Carretera Estatal Tecuexcomac-Tepetitla Km 1.5, 90700 Tlax, Mexico
| | - N. Manjarrez
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Xochimilco, Calzada del Hueso 1100, Colonia Villa Quietud, 09460 Coyoacán, DF, Mexico
| | - H. I. Pérez
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Xochimilco, Calzada del Hueso 1100, Colonia Villa Quietud, 09460 Coyoacán, DF, Mexico
| | - J. Cassani
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Xochimilco, Calzada del Hueso 1100, Colonia Villa Quietud, 09460 Coyoacán, DF, Mexico
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Prato-Garcia D, Cervantes FJ, Buitrón G. Azo dye decolorization assisted by chemical and biogenic sulfide. JOURNAL OF HAZARDOUS MATERIALS 2013; 250-251:462-468. [PMID: 23500427 DOI: 10.1016/j.jhazmat.2013.02.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 02/12/2013] [Accepted: 02/13/2013] [Indexed: 06/01/2023]
Abstract
The effectiveness of chemical and biogenic sulfide in decolorizing three sulfonated azo dyes and the robustness of a sulfate-reducing process for simultaneous decolorization and sulfate removal were evaluated. The results demonstrated that decolorization of azo dyes assisted by chemical sulfide and anthraquinone-2,6-disulfonate (AQDS) was effective. In the absence of AQDS, biogenic sulfide was more efficient than chemical sulfide for decolorizing the azo dyes. The performance of sulfate-reducing bacteria in attached-growth sequencing batch reactors suggested the absence of competition between the studied azo dyes and the sulfate-reducing process for the reducing equivalents. Additionally, the presence of chemical reduction by-products had an almost negligible effect on the sulfate removal rate, which was nearly constant (94%) after azo dye injection.
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Affiliation(s)
- Dorian Prato-Garcia
- Laboratory for Research on Advanced Processes for Water Treatment, Unidad Académica Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, Querétaro 76230, Mexico
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Jamal F, Singh S, Qidwai T, Pandey PK, Singh D. Optimization of internal conditions for biocatalytic dye color removal and a comparison of redox mediator's efficiency on partially purified Trichosanthes dioica peroxidase. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2011.09.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Biocatalytic activity of immobilized pointed gourd (Trichosanthes dioica) peroxidase–concanavalin A complex on calcium alginate pectin gel. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2011.09.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Catalytic potential of cauliflower (Brassica oleracea) bud peroxidase in decolorization of synthetic recalcitrant dyes using redox mediator. CATAL COMMUN 2011. [DOI: 10.1016/j.catcom.2011.08.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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