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Demirbas A, Karsli B, Ocsoy I. Facile Synthesis of Hybrid Nanoflowers Using Glycine and Phenylalanine and Investigation of Their Catalytic Activity. Chem Biodivers 2023; 20:e202300743. [PMID: 37438322 DOI: 10.1002/cbdv.202300743] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/08/2023] [Accepted: 07/09/2023] [Indexed: 07/14/2023]
Abstract
In the context of the proposed work, two different amino acids (Glycine, Phenylalanine) have interacted with copper ions in a phosphate buffer (PBS) in place of enzymes. This interaction resulted in the nucleation of copper phosphate crystals and the formation of flower-shaped amino acid-copper hybrid nanostructures (AA-hNFs), which grew through self-assembly. While Cu (II) ions in the structure of AA-hNFs were used as Fenton's agent for the catalytic activity. SEM, energy dispersive X-ray spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy measurements were used to define the AA-hNFs' characterisation. The peroxidase-like activities of AA-hNFs were investigated by UV/VIS spectrophotometer. Metal nanoparticles have peroxidase-like activity. A class of enzymes known as peroxidases is able to catalyze the conversion of hydrogen peroxide into hydroxyl radicals. These radicals also take part in electron transfers with substrates, which results in color during oxidation. When cupric oxide nanoparticles are added to the peroxidase substrate while H2 O2 is present, a blue color product with a maximum absorbance at=652 nm can result, demonstrating the catalytic activity of a peroxidase. The morphology and composition of AA-hNFs were carefully characterized and the synthesized parameters were optimized systematically. Results showed that the nanoparticles were dispersed with an average diameter of 7-9 μm and indicated a uniform flower shape. The results of the investigation are anticipated to significantly advance a number of technical and scientific sectors.
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Affiliation(s)
- Ayse Demirbas
- Department of Seafood Processing Technology, Faculty of Fisheries, Recep Tayyip Erdogan University, Rize, Turkey
| | - Baris Karsli
- Department of Seafood Processing Technology, Faculty of Fisheries, Recep Tayyip Erdogan University, Rize, Turkey
| | - Ismail Ocsoy
- Department of Analytical Chemistry, Faculty of Pharmacy, Erciyes University, 38039, Kayseri, Turkey
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Dauda MY, Erkurt EA. Investigation of reactive Blue 19 biodegradation and byproducts toxicity assessment using crude laccase extract from Trametes versicolor. JOURNAL OF HAZARDOUS MATERIALS 2020; 393:121555. [PMID: 32143156 DOI: 10.1016/j.jhazmat.2019.121555] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 10/18/2019] [Accepted: 10/26/2019] [Indexed: 06/10/2023]
Abstract
Crude laccase potency on biodegradation and detoxification of Reactive blue 19 (RB-19) were demonstrated, along with prediction of degradation mechanisms, pathways and byproducts analysis. Trametes versicolor, cultured on pampas grass inflorescence (Cortaderia selloana), yielded the best crude laccase activity (15.36 U/g). 10 U CLE activities demonstrated a biodegradation yield (85%) in 210 min, at pH 4, 50 °C and 200 mg/L RB-19 concentrations. Evolution of a brown color that absorbed maximally at 478 nm was observed during biodegradation. Two methods were adopted for byproducts extraction, three methods for toxicity analysis and four models for kinetic parameters (Km and Vmax) determination. 2-ethylanthracene, 2-hydroxycyclohexa-2,4-dien-1-one, 2(4-methylphenyl)-ethan-1-amine, 1-[6-hydroperoxy-4,5-bis(sulfooxy)oxan-3-yl]triaza-1,2-dien-2-ium, naphthalene-2,7-disulfonic acid and N-[(5-oxooxolan-2-yl)methyl]acetamide were detected as toxic byproducts. Brown color evolution was due to 1,1,1-triethyl-3-(methoxycarbonyl)-2,2-dioxo-2λ6-diazathian-1-ium (methoxycarbonyl sulfanyl-triethylammonium hydroxide) inner salt. Increase in color density (light to dark brown) was a function of byproduct(s) biodegradation and polymerization. RB-19 and byproduct acute toxicities were decreased significantly (98% - 6.91%). Kinetic parameters Km (18.05 mg/L) and Vmax (0.31 mg/L. min-1) from the four kinetic models demonstrated higher affinity of CLE to RB-19. CLE yielded a catalytic activity (Vmax/Km =0.017 min-1) demonstrating the flexibility of CLE active site to RB-19 binding over commercial laccase.
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Affiliation(s)
- Mustapha Yakubu Dauda
- Cyprus International University, Department of Environmental Engineering, Haspolat - Nicosia, Turkish Republic of Northern Cyprus via Mersin 10, Turkey; Cyprus International University, Environmental Research Center, Haspolat - Nicosia, Turkish Republic of Northern Cyprus via Mersin 10, Turkey
| | - Emrah Ahmet Erkurt
- Cyprus International University, Department of Environmental Engineering, Haspolat - Nicosia, Turkish Republic of Northern Cyprus via Mersin 10, Turkey; Cyprus International University, Environmental Research Center, Haspolat - Nicosia, Turkish Republic of Northern Cyprus via Mersin 10, Turkey.
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Altinkaynak C, Tavlasoglu S, Kalin R, Sadeghian N, Ozdemir H, Ocsoy I, Özdemir N. A hierarchical assembly of flower-like hybrid Turkish black radish peroxidase-Cu 2+ nanobiocatalyst and its effective use in dye decolorization. CHEMOSPHERE 2017; 182:122-128. [PMID: 28494355 DOI: 10.1016/j.chemosphere.2017.05.012] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Revised: 04/30/2017] [Accepted: 05/02/2017] [Indexed: 06/07/2023]
Abstract
Effective dye decolorization in wastewater still shows a big challenge. Although the biological methods, especially using enzymes, offer alternative and effective process for dye degradation and overcome the limitations of chemical and physical methods such as the instability, lack of reusability and high cost of free enzymes strictly, which limit their use in many scientific and technical applications. Enzymes rapidly lose their activities in aqueous solutions and against environmental changes due to their very susceptibility and unfavorable conformations. Herein, we report preparation of the enzyme-inorganic hybrid nanostructures with flower-like shape consisting of Turkish black radish peroxidase and Cu2+ metal ions using an encouraging enzyme immobilization approach. The peroxidase-Cu2+ hybrid nanoflowers (NFs) exhibited enhanced stability and activity towards various pH values and provided excellent dye decolorization efficiency for Victoria blue (VB) dye with more than 90% within 1 h. The NFs were also repeatedly used in efficient and caused 77% VB decolorization efficiency even at tenth cycles. However, to the best of our knowledge, for the first time, we prepared peroxidase enzyme isolated from Turkish black radish incorporated NFs and used them for dye decolorization. We believe that the NFs can be promising materials for dye decolorization in real wastewater treatment.
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Affiliation(s)
- Cevahir Altinkaynak
- Department of Analytical Chemistry, Faculty of Pharmacy, Erciyes University, 38039, Kayseri, Turkey; Nanotechnology Research Center, Erciyes University, Kayseri, 38039, Turkey
| | - Sureyya Tavlasoglu
- Department of Chemistry, Faculty of Science, Erciyes University, Kayseri, 38039, Turkey
| | - Ramazan Kalin
- Department of Basic Sciences, Faculty of Science, Erzurum Technical University, Erzurum, Turkey; Department of Chemistry, Faculty of Science, Ataturk University, Erzurum, 25030, Turkey
| | - Nastaran Sadeghian
- Department of Chemistry, Faculty of Science, Ataturk University, Erzurum, 25030, Turkey
| | - Hasan Ozdemir
- Department of Chemistry, Faculty of Science, Ataturk University, Erzurum, 25030, Turkey
| | - Ismail Ocsoy
- Department of Analytical Chemistry, Faculty of Pharmacy, Erciyes University, 38039, Kayseri, Turkey; Nanotechnology Research Center, Erciyes University, Kayseri, 38039, Turkey.
| | - Nalan Özdemir
- Department of Chemistry, Faculty of Science, Erciyes University, Kayseri, 38039, Turkey.
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Arabaci G, Usluoglu A. The enzymatic decolorization of textile dyes by the immobilized polyphenol oxidase from quince leaves. ScientificWorldJournal 2014; 2014:685975. [PMID: 24587743 PMCID: PMC3918733 DOI: 10.1155/2014/685975] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 11/04/2013] [Indexed: 12/04/2022] Open
Abstract
Water pollution due to release of industrial wastewater has already become a serious problem in almost every industry using dyes to color its products. In this work, polyphenol oxidase enzyme from quince (Cydonia Oblonga) leaves immobilized on calcium alginate beads was used for the successful and effective decolorization of textile industrial effluent. Polyphenol oxidase (PPO) enzyme was extracted from quince (Cydonia Oblonga) leaves and immobilized on calcium alginate beads. The kinetic properties of free and immobilized PPO were determined. Quince leaf PPO enzyme stability was increased after immobilization. The immobilized and free enzymes were employed for the decolorization of textile dyes. The dye solutions were prepared in the concentration of 100 mg/L in distilled water and incubated with free and immobilized quince (Cydonia Oblonga) leaf PPO for one hour. The percent decolorization was calculated by taking untreated dye solution. Immobilized PPO was significantly more effective in decolorizing the dyes as compared to free enzyme. Our results showed that the immobilized quince leaf PPO enzyme could be efficiently used for the removal of synthetic dyes from industrial effluents.
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Affiliation(s)
- Gulnur Arabaci
- Department of Chemistry, Faculty of Science and Arts, Sakarya University, Serdivan, 54187 Sakarya, Turkey
| | - Ayse Usluoglu
- Department of Chemistry, Faculty of Science and Arts, Sakarya University, Serdivan, 54187 Sakarya, Turkey
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Adsorption with biodegradation for decolorization of reactive black 5 by Funalia trogii 200800 on a fly ash-chitosan medium in a fluidized bed bioreactor-kinetic model and reactor performance. Biodegradation 2012; 24:137-52. [DOI: 10.1007/s10532-012-9565-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Accepted: 06/11/2012] [Indexed: 10/28/2022]
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da Silva MR, de Sá LRV, Russo C, Scio E, Ferreira-Leitão VS. The Use of HRP in Decolorization of Reactive Dyes and Toxicological Evaluation of Their Products. Enzyme Res 2011; 2010:703824. [PMID: 21318147 PMCID: PMC3034966 DOI: 10.4061/2010/703824] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Revised: 12/09/2010] [Accepted: 12/23/2010] [Indexed: 11/30/2022] Open
Abstract
This work studied the potential use of horseradish peroxidase (HRP) in the decolorization of the following textile dyes: Drimarene Blue X-3LR (DMBLR), Drimarene Blue X-BLN (DMBBLN), Drimarene Rubinol X-3LR (DMR), and Drimarene Blue CL-R (RBBR). Dyes were individually tested in the reaction media containing 120 mg·L−1, considering the following parameters: temperature (20–45°C), H2O2 concentration (0–4.44 mmol·L−1), and reaction time (5 minutes, 1 and 24 h). The following conditions: 35°C, 0.55 mmol·L−1, and 1h, provided the best set of results of color removal for DMBLR (99%), DMBBLN (77%), DMR (94%), and RBBR (97%). It should be mentioned that only 5 minutes of reaction was enough to obtain 96% of decolorization for DMBLR and RBBR. After the decolorization reactions of DMBLR, DMR, and RBBR, it was possible to observe the reduction of Artemia salina mortality and the no significant increase in toxicity for the products generated from DMBBLN.
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Affiliation(s)
- Michelle Reis da Silva
- Biocatalysis Laboratory, Catalysis Division, National Institute of Technology, Ministry of Science and Technology, Avenue Venezuela 82, Sala 302, 20081-312 Rio de Janeiro, RJ, Brazil
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Teixeira RSS, Pereira PM, Ferreira-Leitão VS. Extraction and Application of Laccases from Shimeji Mushrooms (Pleurotus ostreatus) Residues in Decolourisation of Reactive Dyes and a Comparative Study Using Commercial Laccase from Aspergillus oryzae. Enzyme Res 2010; 2010:905896. [PMID: 21052547 PMCID: PMC2968717 DOI: 10.4061/2010/905896] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 09/10/2010] [Accepted: 10/05/2010] [Indexed: 11/20/2022] Open
Abstract
Oxidases are able to degrade organic pollutants; however, high costs associated with biocatalysts production still hinder their use in environmental biocatalysis. Our study compared the action of a commercial laccase from Aspergillus oryzae and a rich extract from Pleurotus ostreatus cultivation residues in decolourisation of reactive dyes: Drimaren Blue X-3LR (DMBLR), Drimaren Blue X-BLN (DMBBLN), Drimaren Rubinol X-3LR (DMR), and Drimaren Blue C-R (RBBR). The colour removal was evaluated by considering dye concentration, reaction time, absence or presence of the mediator ABTS (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), and the source of laccase. The presence of ABTS was essential for decolourisation of DMR (80–90%, 1 h) and RBBR (80–90%, 24 h) with both laccases. The use of ABTS was not necessary in reactions containing DMBLR (85–97%, 1 h) and DMBBLN (63–84%, 24 h). The decolourisation of DMBBLN by commercial laccase showed levels near 60% while the crude extract presented 80% in 24 h.
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Affiliation(s)
- Ricardo Sposina S Teixeira
- National Institute of Technology, Ministry of Science and Technology, Avenue Venezuela, 82 Centro, 20081-312 Rio de Janeiro, RJ, Brazil
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Levin L, Melignani E, Ramos AM. Effect of nitrogen sources and vitamins on ligninolytic enzyme production by some white-rot fungi. Dye decolorization by selected culture filtrates. BIORESOURCE TECHNOLOGY 2010; 101:4554-63. [PMID: 20153961 DOI: 10.1016/j.biortech.2010.01.102] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2008] [Revised: 01/19/2010] [Accepted: 01/20/2010] [Indexed: 05/07/2023]
Abstract
The effect of amino acids, complex nitrogen sources and vitamin addition on Trametes trogii, Trametes villosa and Coriolus versicolor var. antarcticus ligninolytic enzyme production, was evaluated. Dye decolorization by their culture filtrates was compared. Glutamic acid followed by peptone, were the best N sources for laccase and manganese peroxidase production. The three fungi produced two laccase isoenzymes (molecular weights from 38 up to 150 kDa); their pattern of production was not affected by medium composition. Although the response was not uniform, vitamin addition sometimes stimulated ligninolytic enzyme production, but never inhibited it. Thiamine induced manganese peroxidase production. T. trogii grown in glutamic acid produced culture filtrates with the highest laccase (188.3 U/ml) and manganese peroxidase activities (4.5 U/ml), rendering the best results in decolorization. These crude filtrates were able to decolorize in half hour (at pH 4.5, 30 degrees C): 13%, 23%, 40%, 46%, 82%, 94% and 95% of Gentian Violet, Xylidine, Congo Red, Malachite Green, Remazol Brilliant Blue R, Indigo Carmine and Anthraquinone Blue, respectively.
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Affiliation(s)
- Laura Levin
- Lab. de Micología Experimental, Dpto. de Biodiversidad y Biología Experimental, Fac. Cs. Exactas y Naturales, PROPLAME - PRHIDEB - CONICET, Universidad de Buenos Aires, C1428EHA Ciudad Universitaria, CABA, Argentina.
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9
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Li X, Jia R, Li P, Ang S. Response surface analysis for enzymatic decolorization of Congo red by manganese peroxidase. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.03.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Li X, Jia R. Decolorization and biosorption for Congo red by system rice hull- Schizophyllum sp. F17 under solid-state condition in a continuous flow packed-bed bioreactor. BIORESOURCE TECHNOLOGY 2008; 99:6885-6892. [PMID: 18328697 DOI: 10.1016/j.biortech.2008.01.049] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2007] [Revised: 01/11/2008] [Accepted: 01/20/2008] [Indexed: 05/26/2023]
Abstract
Synthetic dyes are important chemical pollutants from various industries. This work developed an efficient and relatively simple continuous decolorization system rice hull-Schizophyllum sp. F17 under solid-state condition in a packed-bed bioreactor, for decolorizing Congo red. In the decolorization system, two decolorization mechanisms exist, one is decolorization by Schizophyllum sp. F17, the other is biosorption by rice hull. The decolorization efficiency was greatly affected by dye concentration and hydraulic retention time (HRT), which were quantificationally analyzed and optimized through response surface methodology (RSM). A 2(2) full factorial central composite design (CCD) was performed, and three second order polynomial models were generated to describe the effects of dye concentration and HRT on total decolorization (R2=0.902), decolorization by Schizophyllum sp. F17 (R2=0.866) and biosorption by rice hull (R2=0.890). Response surface contour plots were constructed to show the individual and cumulative effects of dye concentration and HRT, and the optimum values. A maximum total decolorization 89.71% and maximum decolorization by Schizophyllum sp. F17 60.44% was achieved at dye concentration 142.63mg/L, HRT 41h, and dye concentration 110.7mg/L, HRT 29.4h, respectively. Meanwhile, the role of manganese peroxidase (MnP) in the decolorizaion process was investigated. This study proved the feasibility of continuous mode for decolorizing synthetic dyes by white-rot fungi in solid-state fermentation bioreactors.
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Affiliation(s)
- Xudong Li
- School of Life Science, Anhui University, Hefei 230039, PR China
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Srikanlaya M, Kitwechkun W, Watanabe T, Khanongnu C. Decolorization of Orange II by Immobilized Thermotolerant White Rot Fungus Coriolus versicolor RC3 in Packed-Bed Bioreactor. ACTA ACUST UNITED AC 2008. [DOI: 10.3923/biotech.2008.280.286] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Mouso N, Diorio L, Forchiassin F. [Stereum hirsutum (Wild) Pers. action in dye degradation]. Rev Iberoam Micol 2007; 24:294-8. [PMID: 18095763 DOI: 10.1016/s1130-1406(07)70059-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Stereum hirsutum, a white rot fungus, has a good growth in solid state fermentation. This was carried on with wheat bran, soy bran and a mixture of both. Mycelia grown on soy bran showed the highest decolorization activity on Ponceau 2R (xylidine), indigo carmine and malachite green. Optimal relationship between decolorization and detoxification of malachite green was 30 g of fresh weight (mycelia plus substrate) in 500 ml malachite green solution, 42 U/l of laccase was measured in this solution. Decolorization was carried on without the addition either of nutrients or mediators. Conditions for maximal decolorization did not agree with those for maximal ligninolytic enzyme production, but effectiveness of laccase activity on decolorization was evidenced by electrophoretic analysis, that allowed laccase identification and its decolorization activity in gels stained with indigo carmine and malachite green, with ABTS as mediator. Detoxification was assayed using the sensible fungus Phanerochaete chrysosporium.
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Affiliation(s)
- Nora Mouso
- Laboratorio de Micología Experimental, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina.
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Husain Q. Potential applications of the oxidoreductive enzymes in the decolorization and detoxification of textile and other synthetic dyes from polluted water: a review. Crit Rev Biotechnol 2007; 26:201-21. [PMID: 17095432 DOI: 10.1080/07388550600969936] [Citation(s) in RCA: 174] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Recently, the enzymatic approach has attracted much interest in the decolorization/degradation of textile and other industrially important dyes from wastewater as an alternative strategy to conventional chemical, physical and biological treatments, which pose serious limitations. Enzymatic treatment is very useful due to the action of enzymes on pollutants even when they are present in very dilute solutions and recalcitrant to the action of various microbes participating in the degradation of dyes. The potential of the enzymes (peroxidases, manganese peroxidases, lignin peroxidases, laccases, microperoxidase-11, polyphenol oxidases, and azoreductases) has been exploited in the decolorization and degradation of dyes. Some of the recalcitrant dyes were not degraded/decolorized in the presence of such enzymes. The addition of certain redox mediators enhanced the range of substrates and efficiency of degradation of the recalcitrant compounds. Several redox mediators have been reported in the literature, but very few of them are frequently used (e.g., 1-hydroxybenzotriazole, veratryl alcohol, violuric acid, 2-methoxy-phenothiazone). Soluble enzymes cannot be exploited at the large scale due to limitations such as stability and reusability. Therefore, the use of immobilized enzymes has significant advantages over soluble enzymes. In the near future, technology based on the enzymatic treatment of dyes present in the industrial effluents/wastewater will play a vital role. Treatment of wastewater on a large scale will also be possible by using reactors containing immobilized enzymes.
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Affiliation(s)
- Qayyum Husain
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India.
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Khan AA, Husain Q. Potential of plant polyphenol oxidases in the decolorization and removal of textile and non-textile dyes. J Environ Sci (China) 2007; 19:396-402. [PMID: 17915700 DOI: 10.1016/s1001-0742(07)60066-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In this study an effort has been made to use plant polyphenol oxidases; potato (Solanum tuberosum) and brinjal (Solanum melongena), for the treatment of various important dyes used in textile and other industries. The ammonium sulphate fractionated enzyme preparations were used to treat a number of dyes under various experimental conditions. Majority of the treated dyes were maximally decolorized at pH 3.0. Some of the dyes were quickly decolorized whereas others were marginally decolorized. The initial first hour was sufficient for the maximum decolorization of dyes. The rate of decolorization was quite slow on long treatment of dyes. Enhancement in the dye decolorization was noticed on increasing the concentration of enzymes. The complex mixtures of dyes were treated with both preparations of polyphenol oxidases in the buffers of varying pH values. Potato polyphenol oxidase was significantly more effective in decolorizing the dyes to higher extent as compared to the enzyme obtained from brinjal polyphenol oxidase. Decolorization of dyes and their mixtures, followed by the formation of an insoluble precipitate, which could be easily removed simply by centrifugation.
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Affiliation(s)
- Amjad Ali Khan
- Department of Biochemistry, Faculty of Life Science, Aligarh Muslim University, Aligarh-202 002, India
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16
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Rodríguez Couto S, Toca Herrera JL. Industrial and biotechnological applications of laccases: A review. Biotechnol Adv 2006; 24:500-13. [PMID: 16716556 DOI: 10.1016/j.biotechadv.2006.04.003] [Citation(s) in RCA: 727] [Impact Index Per Article: 40.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2006] [Revised: 03/29/2006] [Accepted: 04/01/2006] [Indexed: 11/17/2022]
Abstract
Laccases have received much attention from researchers in last decades due to their ability to oxidise both phenolic and non-phenolic lignin related compounds as well as highly recalcitrant environmental pollutants, which makes them very useful for their application to several biotechnological processes. Such applications include the detoxification of industrial effluents, mostly from the paper and pulp, textile and petrochemical industries, use as a tool for medical diagnostics and as a bioremediation agent to clean up herbicides, pesticides and certain explosives in soil. Laccases are also used as cleaning agents for certain water purification systems, as catalysts for the manufacture of anti-cancer drugs and even as ingredients in cosmetics. In addition, their capacity to remove xenobiotic substances and produce polymeric products makes them a useful tool for bioremediation purposes. This paper reviews the applications of laccases within different industrial fields as well as their potential extension to the nanobiotechnology area.
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Affiliation(s)
- Susana Rodríguez Couto
- Department of Chemical Engineering, Rovira i Virgili University, Av. Països Catalans 26, 43007 Tarragona, Spain.
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Unyayar A, Demirbilek M, Turkoglu M, Celik A, Mazmanci MA, Erkurt EA, Unyayar S, Cekic O, Atacag H. Evaluation of cytotoxic and mutagenic effects of Coriolus versicolor and Funalia trogii extracts on mammalian cells. Drug Chem Toxicol 2006; 29:69-83. [PMID: 16455591 DOI: 10.1080/01480540500408655] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
This study examined the in vitro cytotoxic activities of standardized aqueous bioactive extracts prepared from Coriolus versicolor and Funalia trogiiATCC 200800 on HeLa and fibroblast cell lines using a MTT (3-[4,5-dimetiltiazol-2-]-2-5-difeniltetrazolium bromide) cytotoxicity assay. F. trogii and C. versicolor extracts were cytotoxic to both cell lines. At 10 microL treatment level, F. trogii and C. versicolor extracts inhibited proliferation of HeLa cancer cells by 71.5% and 45%, respectively, compared with controls. Toxicity was lower toward normal fibroblasts. In the latter case, treatment at 10 microL level with F. trogii and C. versicolor extracts reduced cell proliferation by 51.3% and 38.7%, respectively. In separate experiments, the mitotic index (MI) obtained with 3 microL treatment level of unheated extracts of the two fungi was comparable to the MI value obtained by treatment with 4 microg/mL MMC (anticancer agent mitomycin-C). A significant induction of sister chromatid exchange (SCE) was observed in normal cultured lymphocytes treated with MMC (4 microg/mL). MMC treatment reduced replication index compared with treatment with unheated F. trogii extract and negative controls (p < 0.001). In contrast to MMC, F. trogii extracts did not affect the proliferation of human lymphocytes compared with controls (p > 0.05). Laccase and peroxidase enzyme activities in F. trogii extract were implicated in their inhibitory effect on cancer cells. F. trogii extract was concluded to have antitumor activity.
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Affiliation(s)
- Ali Unyayar
- Department of Environmental Engineering, Mersin University, Mersin, Turkey.
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Zouari-Mechichi H, Mechichi T, Dhouib A, Sayadi S, Martínez AT, Martínez MJ. Laccase purification and characterization from Trametes trogii isolated in Tunisia: decolorization of textile dyes by the purified enzyme. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2005.11.027] [Citation(s) in RCA: 165] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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