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Marinas IC, Ignat L, Maurușa IE, Gaboreanu MD, Adina C, Popa M, Chifiriuc MC, Angheloiu M, Georgescu M, Iacobescu A, Pircalabioru GG, Stan M, Pinteala M. Insights into the physico-chemical and biological characterization of sodium lignosulfonate - silver nanosystems designed for wound management. Heliyon 2024; 10:e26047. [PMID: 38384565 PMCID: PMC10878957 DOI: 10.1016/j.heliyon.2024.e26047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 02/06/2024] [Accepted: 02/07/2024] [Indexed: 02/23/2024] Open
Abstract
Chronic wounds represent one of the complications that might occur from the disruption of wound healing process. Recently, there has been a rise in interest in employing nanotechnology to develop novel strategies for accelerating wound healing. The aim of the present study was to use a green synthesis method to obtain AgNPs/NaLS systems useful for wounds management and perform an in-depth investigation of their behavior during and post-synthesis as well as of their biological properties. The colloids obtained from silver nanoparticles (AgNPs) and commercial sodium lignosulfonate (NaLS) in a single-pot aqueous procedure have been fully characterized by UV-Vis, FT-IR, DLS, TEM, XRD, and XPS to evaluate the synthesis efficiency and to provide new insights in the process of AgNPs formation and NaLS behavior in aqueous solutions. The effects of various concentrations of NaLS (0-16 mg/mL) and AgNO3 (0-20 mM) and of two different temperatures on AgNPs formation have been analyzed. Although the room temperature is feasible for AgNPs synthesis, the short mixing at 70 °C significantly increases the speed of nanoparticle formation and storage stability. In all experimental conditions AgNPs of 20-40 nm in size have been obtained. The antimicrobial activity assessed quantitatively on clinical and reference bacterial strains, both in suspension and biofilm growth state, revealed a broad antimicrobial spectrum, the most intensive inhibitory effect being noticed against Pseudomonas aeruginosa and Escherichia coli strains. The AgNP/NaLS enhanced the NO extracellular release, potentially contributing to the microbicidal and anti-adherence activity by protein oxidation. Both AgNP/NaLS and NaLS were non-hemolytic (hemolytic index<5%, 2.26 ± 0.13% hemolysis) and biocompatible (102.17 ± 3.43 % HaCaT cells viability). The presence of AgNPs increased the antioxidative activity and induced a significant cytotoxicity on non-melanoma skin cancer cells (62.86 ± 8.27% Cal-27 cells viability). Taken together, all these features suggest the multivalent potential of these colloids for the development of novel strategies for wound management, acting by preventing infection-associated complications and supporting the tissue regeneration.
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Affiliation(s)
- Ioana C. Marinas
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050095, Bucharest, Romania
- Research and Development Department of SC Sanimed International Impex SRL, 6 Bucharest -Giurgiu Street, 087040, Giurgiu, Romania
| | - Leonard Ignat
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley 41A, Iasi, 700487, Romania
| | - Ignat E. Maurușa
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley 41A, Iasi, 700487, Romania
| | - Madalina D. Gaboreanu
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050095, Bucharest, Romania
- Faculty of Biology, Department of Botany and Microbiology, University of Bucharest, 1-3 Portocalelor Street, 060101, Bucharest, Romania
| | - Coroabă Adina
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley 41A, Iasi, 700487, Romania
| | - Marcela Popa
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050095, Bucharest, Romania
- Faculty of Biology, Department of Botany and Microbiology, University of Bucharest, 1-3 Portocalelor Street, 060101, Bucharest, Romania
| | - Mariana C. Chifiriuc
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050095, Bucharest, Romania
- Faculty of Biology, Department of Botany and Microbiology, University of Bucharest, 1-3 Portocalelor Street, 060101, Bucharest, Romania
- Romanian Academy of Scientists, 54 Spl. Independentei St., District 5, 50085, Bucharest, Romania
- The Romanian Academy, 25, Calea Victoriei, Sector 1, District 1, 010071, Bucharest, Romania
| | - Marian Angheloiu
- Research and Development Department of SC Sanimed International Impex SRL, 6 Bucharest -Giurgiu Street, 087040, Giurgiu, Romania
| | - Mihaela Georgescu
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050095, Bucharest, Romania
| | - Alexandra Iacobescu
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley 41A, Iasi, 700487, Romania
| | - Gratiela Gradisteanu Pircalabioru
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050095, Bucharest, Romania
- Faculty of Biology, Department of Botany and Microbiology, University of Bucharest, 1-3 Portocalelor Street, 060101, Bucharest, Romania
| | - Miruna Stan
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050095, Bucharest, Romania
- Faculty of Biology, Department of Biochemistry and Molecular Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095, Bucharest, Romania
| | - Mariana Pinteala
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley 41A, Iasi, 700487, Romania
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Zhang N, Wang S, Gibril ME, Kong F. The copolymer of polyvinyl acetate containing lignin-vinyl acetate monomer: Synthesis and characterization. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2019.109411] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Rodríguez-Escribano D, de Salas F, Pardo I, Camarero S. High-Throughput Screening Assay for Laccase Engineering toward Lignosulfonate Valorization. Int J Mol Sci 2017; 18:E1793. [PMID: 28820431 PMCID: PMC5578181 DOI: 10.3390/ijms18081793] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 08/09/2017] [Accepted: 08/11/2017] [Indexed: 11/17/2022] Open
Abstract
Lignin valorization is a pending issue for the integrated conversion of lignocellulose in consumer goods. Lignosulfonates (LS) are the main technical lignins commercialized today. However, their molecular weight should be enlarged to meet application requirements as additives or dispersing agents. Oxidation of lignosulfonates with fungal oxidoreductases, such as laccases, can increase the molecular weight of lignosulfonates by the cross-linking of lignin phenols. To advance in this direction, we describe here the development of a high-throughput screening (HTS) assay for the directed evolution of laccases, with lignosulfonate as substrate and the Folin-Ciocalteau reagent (FCR), to detect the decrease in phenolic content produced upon polymerization of lignosulfonate by the enzyme. Once the reaction conditions were adjusted to the 96-well-plate format, the enzyme for validating the assay was selected from a battery of high-redox-potential laccase variants functionally expressed in S. cerevisiae (the preferred host for the directed evolution of fungal oxidoreductases). The colorimetric response (absorbance at 760 nm) correlated with laccase activity secreted by the yeast. The HTS assay was reproducible (coefficient of variation (CV) = 15%) and sensitive enough to detect subtle differences in activity among yeast clones expressing a laccase mutant library obtained by error-prone PCR (epPCR). The method is therefore feasible for screening thousands of clones during the precise engineering of laccases toward valorization of lignosulfonates.
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Affiliation(s)
| | - Felipe de Salas
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain.
| | - Isabel Pardo
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain.
- National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA.
| | - Susana Camarero
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain.
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Su J, Fu J, Wang Q, Silva C, Cavaco-Paulo A. Laccase: a green catalyst for the biosynthesis of poly-phenols. Crit Rev Biotechnol 2017; 38:294-307. [PMID: 28738694 DOI: 10.1080/07388551.2017.1354353] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Laccases (benzene diol: oxidoreductases, EC 1.10.3.2) are able to catalyze the oxidation of various compounds containing phenolic and aniline structures using dissolved oxygen in water. Laccase structural features and catalytic mechanisms focused on the polymerization of aromatic compounds are reported. A description about the most recent research on the biosynthesis of chemicals and polymers is made. Selected applications of this technology are considered as well as the advantages, shortcomings and future needs related with the use of laccases.
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Affiliation(s)
- Jing Su
- a Key laboratory of Science and Technology of Eco-Textile, Ministry of Education , Jiangnan University , Wuxi , Jiangsu , China
| | - Jiajia Fu
- a Key laboratory of Science and Technology of Eco-Textile, Ministry of Education , Jiangnan University , Wuxi , Jiangsu , China
| | - Qiang Wang
- a Key laboratory of Science and Technology of Eco-Textile, Ministry of Education , Jiangnan University , Wuxi , Jiangsu , China
| | - Carla Silva
- b Centre of Biological Engineering (CEB) , University of Minho , Braga , Portugal
| | - Artur Cavaco-Paulo
- a Key laboratory of Science and Technology of Eco-Textile, Ministry of Education , Jiangnan University , Wuxi , Jiangsu , China.,b Centre of Biological Engineering (CEB) , University of Minho , Braga , Portugal
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Hussain A, Zia KM, Tabasum S, Noreen A, Ali M, Iqbal R, Zuber M. Blends and composites of exopolysaccharides; properties and applications: A review. Int J Biol Macromol 2017; 94:10-27. [DOI: 10.1016/j.ijbiomac.2016.09.104] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Revised: 09/23/2016] [Accepted: 09/29/2016] [Indexed: 01/21/2023]
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Wu H, Noro J, Wang Q, Fan X, Silva C, Cavaco-Paulo A. Jute hydrophobization via laccase-catalyzed grafting of fluorophenol and fluoroamine. RSC Adv 2016. [DOI: 10.1039/c6ra17687a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The figure mechanism of the 4-[4-(trifluoromethyl)phenoxy]phenol (TFMPP) and 1H,1H-perfluorononylamine (PFNL) grafting onto the lignins of jute fabrics.
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Affiliation(s)
- Huimin Wu
- Key Laboratory of Science and Technology of Eco-Textiles
- Ministry of Education
- Jiangnan University
- Wuxi 214122
- PR China
| | - Jennifer Noro
- Centre of Biological Engineering
- University of Minho
- Braga
- Portugal
| | - Qiang Wang
- Key Laboratory of Science and Technology of Eco-Textiles
- Ministry of Education
- Jiangnan University
- Wuxi 214122
- PR China
| | - Xuerong Fan
- Key Laboratory of Science and Technology of Eco-Textiles
- Ministry of Education
- Jiangnan University
- Wuxi 214122
- PR China
| | - Carla Silva
- Centre of Biological Engineering
- University of Minho
- Braga
- Portugal
| | - Artur Cavaco-Paulo
- Centre of Biological Engineering
- University of Minho
- Braga
- Portugal
- International Joint Research Laboratory for Textile and Fiber Bioprocesses
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Zhang Y, Dong A, Fan X, Wang Q, Zhang Y, Yu Y, Cavaco-Paulo A. Laccase-catalyzed synthesis of conducting polyaniline-lignosulfonate composite. J Appl Polym Sci 2015. [DOI: 10.1002/app.42941] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ya Zhang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education; Jiangnan University; Wuxi Jiangsu 214122 China
| | - Aixue Dong
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education; Jiangnan University; Wuxi Jiangsu 214122 China
| | - Xuerong Fan
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education; Jiangnan University; Wuxi Jiangsu 214122 China
| | - Qiang Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education; Jiangnan University; Wuxi Jiangsu 214122 China
- International Joint Research Laboratory for Textile and Fibre Bioprocesses; Jiangnan University; Wuxi Jiangsu 214122 China
| | - Ying Zhang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education; Jiangnan University; Wuxi Jiangsu 214122 China
| | - Yuanyuan Yu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education; Jiangnan University; Wuxi Jiangsu 214122 China
| | - Artur Cavaco-Paulo
- International Joint Research Laboratory for Textile and Fibre Bioprocesses; Jiangnan University; Wuxi Jiangsu 214122 China
- Department of Biological Engineering; University of Minho, Campus De Gualtar; Braga 4710-057 Portugal
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Imami A, Riemer S, Schulze M, Amelung F, Gorshkov V, Rühl M, Ammenn J, Zorn H. Depolymerization of lignosulfonates by submerged cultures of the basidiomycete Irpex consors and cloning of a putative versatile peroxidase. Enzyme Microb Technol 2015; 81:8-15. [PMID: 26453467 DOI: 10.1016/j.enzmictec.2015.07.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/15/2015] [Accepted: 07/24/2015] [Indexed: 11/28/2022]
Abstract
Lignosulfonates are abundantly available byproducts of the paper and pulping industry, and they therefore represent a promising feedstock for new sustainable processes. For industrial applications of lignosulfonates, their molecular weight distribution is a critical factor. In order to decrease the average molecular weight of lignosulfonates, Seventeen basidiomycetes were screened for their capability to depolymerize lignosulfonates from spent sulfite liquor (SSL) in surface and liquid cultures. Five basidiomycetes polymerized the lignosulfonates under the selected conditions. Only Irpex consors was found to efficiently degrade calcium lignosulfonates when SSL (0.5%, w/w) was used as the sole carbon and nitrogen source. The average molecular weight of the lignosulfonates was reduced from ∼26 to ∼4 kDa as determined by size exclusion chromatography (SEC) within two weeks. Various extracellular enzyme activities of I. consors were determined over the culture period. High peroxidase activities were correlating with a high degradation rate and the culture was harvested at the day of highest peroxidase activity. A putative versatile peroxidase was isolated by fast protein liquid chromatography (FPLC) and its encoding cDNA was cloned.
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Affiliation(s)
- A Imami
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Heinrich-Buff Ring 58, 35392 Giessen, Germany
| | - S Riemer
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Heinrich-Buff Ring 58, 35392 Giessen, Germany
| | - M Schulze
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Heinrich-Buff Ring 58, 35392 Giessen, Germany
| | - F Amelung
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Heinrich-Buff Ring 58, 35392 Giessen, Germany
| | - V Gorshkov
- Institute of Analytical Chemistry, Justus Liebig University Giessen, Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Schubertstraße 60, 35392 Giessen, Germany
| | - M Rühl
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Heinrich-Buff Ring 58, 35392 Giessen, Germany
| | - J Ammenn
- BASF SE, G-EVX/LAD-G100, 67056 Ludwigshafen, Germany
| | - H Zorn
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Heinrich-Buff Ring 58, 35392 Giessen, Germany.
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Jiang F, Hsieh YL. Holocellulose Nanocrystals: Amphiphilicity, Oil/Water Emulsion, and Self-Assembly. Biomacromolecules 2015; 16:1433-41. [DOI: 10.1021/acs.biomac.5b00240] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Feng Jiang
- Fiber and Polymer Science, University of California, Davis, California 95616, United States
| | - You-Lo Hsieh
- Fiber and Polymer Science, University of California, Davis, California 95616, United States
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Sun X, Bai R, Zhang Y, Wang Q, Fan X, Yuan J, Cui L, Wang P. Laccase-Catalyzed Oxidative Polymerization of Phenolic Compounds. Appl Biochem Biotechnol 2013; 171:1673-80. [DOI: 10.1007/s12010-013-0463-0] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Accepted: 08/22/2013] [Indexed: 11/24/2022]
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Madad N, Chebil L, Charbonnel C, Ioannou I, Ghoul M. Enzymatic polymerization of sodium lignosulfonates: effect of catalysts, initial molecular weight, and mediators. CAN J CHEM 2013. [DOI: 10.1139/cjc-2012-0036] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to investigate the effect of different parameters on the enzymatic polymerization of sodium lignosulfonates (SLS) by laccase, compared with the chemical treatment by manganese III. Different initial molecular weights of SLS (commercial SLS (17 800 Da), F1 (4300 Da), F2 (2500 Da), and F3 (2300 Da)) were tested. Size exclusion chromatography (SEC-UV), Fourier transform infrared (FT-IR) and phenolic group determination showed that SLS molecular weight increases depending on the laccase origin, the enzyme, and the substrate concentrations and the initial molecular weight of the SLS fractions. The highest molecular weight (Mw) was obtained by fungal laccases, specifically when using laccase from Trametes versicolor, while no reactivity was observed by plant laccase (laccase from Rhus vernicifera). The largest increase of Mw (108 600 Da) is reached when using SLS (17 800 Da) at 50 g/L and 30 U/mL of laccase from Trametes versicolor. The laccase polymerization of SLS can be improved by the use of a mediator. In this study, 5 mediators were studied for F1 polymerization by laccase from Trametes versicolor: acetosyringone (ASG), violuric acid (VLA), 1-hydroxy-benzotriazole (HBT), acetovanillone (ACV) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). Results of F1 polymerization with mediators showed that only ASG and VLA lead to a higher molecular weight (7500 Da) compared with reactions carried without a mediator (6600 Da).
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Affiliation(s)
- Nidal Madad
- Laboratoire d'Ingénierie des Biomolécules, ENSAIA-INPL, Vandoeuvre-les-Nancy, France
| | - Latifa Chebil
- Laboratoire d'Ingénierie des Biomolécules, ENSAIA-INPL, Vandoeuvre-les-Nancy, France
| | - Celine Charbonnel
- Laboratoire d'Ingénierie des Biomolécules, ENSAIA-INPL, Vandoeuvre-les-Nancy, France
| | - Irina Ioannou
- Laboratoire d'Ingénierie des Biomolécules, ENSAIA-INPL, Vandoeuvre-les-Nancy, France
| | - Mohamed Ghoul
- Laboratoire d'Ingénierie des Biomolécules, ENSAIA-INPL, Vandoeuvre-les-Nancy, France
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Raschip IE, Hitruc GE, Vasile C, Popescu MC. Effect of the lignin type on the morphology and thermal properties of the xanthan/lignin hydrogels. Int J Biol Macromol 2012; 54:230-7. [PMID: 23274678 DOI: 10.1016/j.ijbiomac.2012.12.036] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Revised: 12/13/2012] [Accepted: 12/18/2012] [Indexed: 10/27/2022]
Abstract
This paper reports the morphological and thermal characterization of xanthan/lignin hydrogels. It has been emphasized the effect of the lignin type on the hydrogel properties. The hydrogels described here were obtained by chemical crosslinking, in the presence of epichlorohydrine as a cross-linker agent. The obtained materials were analyzed by AFM, TG/DTG, DSC, and FT-IR spectroscopy. It has been established that hydrogels have a porous morphology. The lignin type influences the hydrogel morphology which is either fibrilar as in case of hydrogel containing aspen wood lignin (which has the highest content of COOH groups and lowest content of phenolic OH groups) or smooth surface for other hydrogels. The specific intermolecular interactions are stronger in the case of 70 xanthan (X)/30 aspen wood lignin (AWL) hydrogel. The thermal properties of the hydrogels also depend on lignin type, the lowest thermal stability being found for the hydrogel containing lignin with the highest content of functional groups (AWL).
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Affiliation(s)
- Irina Elena Raschip
- Petru Poni Institute of Macromolecular Chemistry of Romanian Academy, Department of Physical Chemistry of Polymers, 41A Gr. Ghica Voda Alley, Iasi-700487, Romania.
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Fu J, Nyanhongo GS, Gübitz GM, Cavaco-Paulo A, Kim S. Enzymatic colouration with laccase and peroxidases: Recent progress. BIOCATAL BIOTRANSFOR 2012. [DOI: 10.3109/10242422.2012.649563] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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14
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Black Liquor Decolorization by Selected White-Rot Fungi. Appl Biochem Biotechnol 2011; 165:406-15. [DOI: 10.1007/s12010-011-9260-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Accepted: 04/04/2011] [Indexed: 10/18/2022]
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Dulman V, Ignat ME, Bunia I. Decolorization of ammonium lignosulfonate with H(2)O(2)/Cu(II) heterogeneous catalyst. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2011; 46:1366-1375. [PMID: 21942389 DOI: 10.1080/10934529.2011.606701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The potential of ammonium lignosulfonate (ALS) decolorization and degradation in aqueous solution was studied in a heterogeneous system using hydrogen peroxide and a Cu (II)-chelating ion exchanger. This was based on acrylic copolymers functionalized with N,N dimethylamino propylamine (DMAPA) as a catalyst. In order to optimize the efficiency of the system, the influence of such process parameters like H(2)O(2) concentration, pH, contact time, temperature, ALS concentration and catalyst amount were evaluated. The apparent rate constant of decolorization calculated from the absorbance data indicates that the process profiles follow pseudo-first order kinetics. Lignosulfonate degradation was furthermore studied by FTIR spectroscopy, thermogravimetric analysis and determination in phenolic compounds. The catalyst stability and reusability have also been investigated. Our experimental results clearly indicate that, under optimum conditions, the ammonium lignosulfonate solutions exhibit a total bleaching associated with degradation and significant mineralization to CO(2).
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Affiliation(s)
- Viorica Dulman
- Alexandru Ioan Cuza University, Department of Chemistry, Iaşi, România
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