101
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Huang S, Ma C, Li C, Min C, Du P, Xia Y, Yang C, Huang Q. Facile Synthesis, Characterization of Poly-2-mercapto-1,3,4-thiadiazole Nanoparticles for Rapid Removal of Mercury and Silver Ions from Aqueous Solutions. Polymers (Basel) 2018; 10:E150. [PMID: 30966186 PMCID: PMC6415195 DOI: 10.3390/polym10020150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Revised: 01/31/2018] [Accepted: 02/01/2018] [Indexed: 11/16/2022] Open
Abstract
Industrial pollution by heavy metal ions such as Hg2+ and Ag⁺ is a universal problem owing to the toxicity of heavy metals. In this study, a novel nano-adsorbent, i.e., poly-2-mercapto-1,3,4-thiadiazole (PTT), was synthesized and used to selectively adsorb mercury and silver ions from aqueous solutions. PTT nanoparticles were synthesized via chemical oxidative dehydrogenation polymerization under mild conditions. Oxidant species, medium, monomer concentration, oxidant/monomer molar ratio, and polymerization temperature were optimized to obtain optimum yields. The molecular structure and morphology of the nanoparticles were analyzed by ultraviolet-visible (UV-Vis), Fourier transform infrared (FT-IR), matrix-assisted laser desorption/ionization/time-of-flight (MALDI/TOF) mass and X-ray photoelectron (XPS) spectroscopies, wide-angle X-ray diffraction (WAXD), theoretical calculations and transmission electron microscopy (TEM), respectively. It was found that the polymerization of 2-mercapto-1,3,4-thiodiazole occurs through head-to-tail coupling between the S(2) and C(5) positions. The PTT nanoparticles having a peculiar synergic combination of four kinds of active groups, S⁻, ⁻SH, N⁻N, and =N⁻ with a small particle size of 30⁻200 nm exhibit ultrarapid initial adsorption rates of 1500 mg(Hg)·g-1·h-1 and 5364 mg(Ag)·g-1·h-1 and high adsorption capacities of up to 186.9 mg(Hg)·g-1 and 193.1 mg(Ag)·g-1, becoming ultrafast chelate nanosorbents with high adsorption capacities. Kinetic study indicates that the adsorption of Hg2+ and Ag⁺ follows the pseudo-second-order model, suggesting a chemical adsorption as the rate-limiting step during the adsorption process. The Hg2+ and Ag⁺-loaded PTT nanoparticles could be effectively regenerated with 0.1 mol·L-1 EDTA or 1 mol·L-1 HNO₃ without significantly losing their adsorption capacities even after five adsorption⁻desorption cycles. With these impressive properties, PTT nanoparticles are very promising materials in the fields of water-treatment and precious metals recovery.
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Affiliation(s)
- Shaojun Huang
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China.
| | - Chengzhang Ma
- School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
| | - Chao Li
- School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
| | - Chungang Min
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China.
| | - Ping Du
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China.
| | - Yi Xia
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China.
| | - Chaofen Yang
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China.
| | - Qiuling Huang
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China.
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102
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Surface chemical characterization of deactivated low-level mercury catalysts for acetylene hydrochlorination. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2017.07.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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103
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Wlodarczyk D, Méricq JP, Soussan L, Bouyer D, Faur C. Enzymatic gelation to prepare chitosan gels: Study of gelation kinetics and identification of limiting parameters for controlled gel morphology. Int J Biol Macromol 2018; 107:1175-1183. [DOI: 10.1016/j.ijbiomac.2017.09.097] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 09/14/2017] [Accepted: 09/23/2017] [Indexed: 11/30/2022]
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104
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Bösiger P, Tegl G, Richard IM, Le Gat L, Huber L, Stagl V, Mensah A, Guebitz GM, Rossi RM, Fortunato G. Enzyme functionalized electrospun chitosan mats for antimicrobial treatment. Carbohydr Polym 2018; 181:551-559. [DOI: 10.1016/j.carbpol.2017.12.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 10/21/2017] [Accepted: 12/03/2017] [Indexed: 02/01/2023]
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105
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Taketa TB, Dos Santos DM, Fiamingo A, Vaz JM, Beppu MM, Campana-Filho SP, Cohen RE, Rubner MF. Investigation of the Internal Chemical Composition of Chitosan-Based LbL Films by Depth-Profiling X-ray Photoelectron Spectroscopy (XPS) Analysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:1429-1440. [PMID: 29307187 DOI: 10.1021/acs.langmuir.7b04104] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Chitosan-based thin films were assembled using the layer-by-layer technique, and the axial composition was accessed using X-ray photoelectron spectroscopy with depth profiling. Chitosan (CHI) samples possessing different degrees of acetylation ([Formula: see text]) and molecular weight ([Formula: see text]) produced via the ultrasound-assisted deacetylation reaction were used in this study along with two different polyanions, namely, sodium polystyrenesulfonate (PSS) and carboxymethylcellulose (CMC). When chitosan, a positively charged polymer in aqueous acid medium, was combined with a strong polyanion (PSS), the total positive charge of chitosan, directly related to its [Formula: see text], was the key factor affecting the film formation. However, for CMC/CHI films, the pH of the medium and [Formula: see text] of chitosan strongly affected the film structure and composition. Consequently, the structure and the axial composition of chitosan-based films can be finely adjusted by choosing the polyanion and defining the chitosan to be used according to its DA and [Formula: see text] for the desired application, as demonstrated by the antibacterial tests.
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Affiliation(s)
- Thiago B Taketa
- School of Chemical Engineering, University of Campinas , 13083-852 SP, Campinas, Brazil
| | - Danilo M Dos Santos
- São Carlos Institute of Chemistry, University of São Paulo , 13010-111 SP, São Paulo, Brazil
| | - Anderson Fiamingo
- São Carlos Institute of Chemistry, University of São Paulo , 13010-111 SP, São Paulo, Brazil
| | - Juliana M Vaz
- School of Chemical Engineering, University of Campinas , 13083-852 SP, Campinas, Brazil
| | - Marisa M Beppu
- School of Chemical Engineering, University of Campinas , 13083-852 SP, Campinas, Brazil
| | - Sérgio P Campana-Filho
- São Carlos Institute of Chemistry, University of São Paulo , 13010-111 SP, São Paulo, Brazil
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106
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de Sousa M, Martins CHZ, Franqui LS, Fonseca LC, Delite FS, Lanzoni EM, Martinez DST, Alves OL. Covalent functionalization of graphene oxide with d-mannose: evaluating the hemolytic effect and protein corona formation. J Mater Chem B 2018; 6:2803-2812. [DOI: 10.1039/c7tb02997g] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Graphene oxide mannosylation impacts on RBCs toxicity and plasma protein interactions.
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Affiliation(s)
- Marcelo de Sousa
- Laboratory of Solid State Chemistry
- Institute of Chemistry
- University of Campinas
- Brazil
| | - Carlos H. Z. Martins
- Laboratory of Solid State Chemistry
- Institute of Chemistry
- University of Campinas
- Brazil
| | - Lidiane S. Franqui
- Brazilian Nanotechnology National Laboratory (LNNano)
- Brazilian Center for Research in Energy and Materials (CNPEM)
- Campinas
- Brazil
- School of Technology
| | - Leandro C. Fonseca
- Laboratory of Solid State Chemistry
- Institute of Chemistry
- University of Campinas
- Brazil
| | | | - Evandro M. Lanzoni
- Brazilian Nanotechnology National Laboratory (LNNano)
- Brazilian Center for Research in Energy and Materials (CNPEM)
- Campinas
- Brazil
| | - Diego Stéfani T. Martinez
- Laboratory of Solid State Chemistry
- Institute of Chemistry
- University of Campinas
- Brazil
- Brazilian Nanotechnology National Laboratory (LNNano)
| | - Oswaldo L. Alves
- Laboratory of Solid State Chemistry
- Institute of Chemistry
- University of Campinas
- Brazil
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107
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Zhao C, Yan Q, Wang S, Dong P, Zhang L. Regenerable g-C3N4–chitosan beads with enhanced photocatalytic activity and stability. RSC Adv 2018; 8:27516-27524. [PMID: 35540016 PMCID: PMC9083882 DOI: 10.1039/c8ra04293d] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 07/25/2018] [Indexed: 01/19/2023] Open
Abstract
In this study, a series of regenerable graphitic carbon nitride–chitosan (g-C3N4–CS) beads were successfully synthesized via the blend crosslinking method. The prepared beads were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The structural characterization results indicate that the g-C3N4 granules were uniformly distributed on the surface of the chitosan matrix, and the structures of g-C3N4 and CS are maintained. In addition, the prepared g-C3N4–CS beads exhibited efficient MB degradation and stability. The optimum photocatalytic activity of our synthesized g-C3N4–CS beads was higher than that of the bulk g-C3N4 by a factor of 1.78 for MB. The improved photocatalytic activity was predominantly attributed to the synergistic effect between in situ adsorption and photocatalytic degradation. In addition, the reacted g-C3N4–CS beads can be regenerated by merely adding sodium hydroxide and hydrogen peroxide. Additionally, the regenerated g-C3N4–CS beads exhibit excellent stability after four runs, while the mass loss is less than 10%. This work might provide guidance for the design and fabrication of easily regenerated g-C3N4-based photocatalysts for environmental purification. In this study, a series of regenerable graphitic carbon nitride–chitosan (g-C3N4–CS) beads were successfully synthesized via the blend crosslinking method.![]()
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Affiliation(s)
- Chaocheng Zhao
- State Key Laboratory of Petroleum Pollution Control
- China University of Petroleum (East China)
- Qingdao
- PR China
| | - Qingyun Yan
- State Key Laboratory of Petroleum Pollution Control
- China University of Petroleum (East China)
- Qingdao
- PR China
| | - Shuaijun Wang
- State Key Laboratory of Petroleum Pollution Control
- China University of Petroleum (East China)
- Qingdao
- PR China
| | - Pei Dong
- State Key Laboratory of Petroleum Pollution Control
- China University of Petroleum (East China)
- Qingdao
- PR China
| | - Liang Zhang
- State Key Laboratory of Petroleum Pollution Control
- China University of Petroleum (East China)
- Qingdao
- PR China
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108
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Highly Productive Synthesis, Characterization, and Fluorescence and Heavy Metal Ion Adsorption Properties of Poly(2,5-dimercapto-1,3,4-thiadiazole) Nanosheets. Polymers (Basel) 2017; 10:polym10010024. [PMID: 30966062 PMCID: PMC6414834 DOI: 10.3390/polym10010024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 12/14/2017] [Accepted: 12/22/2017] [Indexed: 11/17/2022] Open
Abstract
Poly(2,5-dimercapto-1,3,4-thiadiazole) (PBT) nanosheets were synthesized by chemical oxidative synthesis under mild conditions. The media, oxidant species, monomer concentrations, oxidant/monomer molar ratio, and temperature were optimized to achieve higher yields and better performance. The molecular structure, morphology, and properties of the nanosheets were analyzed by Fourier transform infrared (FT-IR), ultraviolet-visible (UV-Vis), and fluorescence spectroscopies, wide-angle X-ray diffraction (WAXD), matrix-assisted laser desorption/ionization/time-of-flight (MALDI-TOF) mass spectrometry, X-ray photoelectron spectroscopy (XPS), scanning electronic microscopy (SEM), transmission electron microscopy (TEM), and simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC). It was found that the polymerization of 2,5-dimercapto-1,3,4-thiadiazole occurs via dehydrogenation coupling between two mercapto groups to form the ⁻S⁻S⁻ bond. PBTs show the highest polymerization yield of up to 98.47% and form uniform nanosheets with a thickness of 89~367 nm. poly(2,5-dimercapto-1,3,4-thiadiazole) polymers (PBTs) exhibit good chemical resistance, high thermostability, interesting blue-light emitting fluorescence, and wonderful heavy metal ion adsorption properties. Particularly, the PBT nanosheets having a unique synergic combination of three kinds of active ⁻S⁻, ⁻SH, and =N⁻ groups with a moderate specific area of 15.85 m² g-1 exhibit an ultra-rapid initial adsorption rate of 10,653 mg g-1 h-1 and an ultrahigh adsorption capacity of up to 680.01 mg g-1 for mercury ion, becoming ultrafast chelate nanosorbents with a high adsorption capacity. With these impressive properties, PBT nanosheets are very promising materials in the fields of water treatment, sensors, and electrodes.
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109
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Xie R, Jin Y, Chen Y, Jiang W. The importance of surface functional groups in the adsorption of copper onto walnut shell derived activated carbon. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:3022-3034. [PMID: 29210688 DOI: 10.2166/wst.2017.471] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this study, activated carbon (AC) was prepared from walnut shell using chemical activation. The surface chemistry of the prepared AC was modified by introducing or blocking certain functional groups, and the role of the different functional groups involved in the copper uptake was investigated. The structural and chemical heterogeneity of the produced carbons are characterized by Fourier transform infrared spectrometry, X-ray photoelectron spectroscopy, Boehm titration method and N2/77 K adsorption isotherm analysis. The equilibrium and the kinetics of copper adsorption onto AC were studied. The results demonstrated that the functional groups on AC played an important role in copper uptake. Among various surface functional groups, the oxygen-containing group was found to play a critical role in the copper uptake, and oxidation is the most effective way to improve Cu (II) adsorption onto AC. Ion-exchange was identified to be the dominant mechanism in the copper uptake by AC. Some other types of interactions, like complexation, were also proven to be involved in the adsorption process, while physical force was found to play a small role in the copper uptake. The regeneration of copper-loaded AC and the recovery of copper were also studied to evaluate the reusability of the oxidized AC.
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Affiliation(s)
- Ruzhen Xie
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Yan Jin
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Yao Chen
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Wenju Jiang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail: ; National Engineering Research Center for Flue Gas Desulfurization, Chengdu 610065, China
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110
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1,5 diphenyl carbazide immobilized cross-linked chitosan films: An integrated approach towards enhanced removal of Cr(VI). J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.09.122] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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111
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Sennour R, Shiao TC, Arus VA, Tahir MN, Bouazizi N, Roy R, Azzouz A. Cu 0-Loaded organo-montmorillonite with improved affinity towards hydrogen: an insight into matrix-metal and non-contact hydrogen-metal interactions. Phys Chem Chem Phys 2017; 19:29333-29343. [PMID: 29075707 DOI: 10.1039/c7cp04784c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Copper-loaded organo-montmorillonite showed improved affinity towards hydrogen under ambient conditions. Clay ion exchange with a propargyl-ended cation followed by thiol-yne coupling with thioglycerol resulted in a porous structure with a 6 fold higher specific surface area, which dramatically decreased after copper incorporation. X-ray diffraction and photoelectron spectrometry, nuclear magnetic resonance (1H and 13C) and CO2-thermal programmed desorption revealed strong sulfur:Cu0 and oxygen:Cu0 interactions. This was explained in terms of structure compaction that 'traps' Cu0 nanoparticles (CuNPs) and reduces their mobility. Transmission electron microscopy showed predominant 1.0-1.5 nm CuNPs. Hydrogen capture appears to involve predominantly physical interaction, since differential scanning calorimetry measurements gave low desorption heat and almost complete gas release between 20 °C and 75 °C. Possible hydrogen condensation within the compacted structure should hinder gas diffusion inside CuNPs and prevent chemisorption. These results allow safe hydrogen storage with easy gas release to be envisaged even at room temperature under vacuum. The reversible capture of hydrogen can be even more attractive when using natural inorganic supports and commercial plant-derived dendrimers judiciously functionalized, even at the expense of porosity.
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Affiliation(s)
- Radia Sennour
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, QC, Canada H3C 3P8.
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112
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Yang HC, Gong JL, Zeng GM, Zhang P, Zhang J, Liu HY, Huan SY. Polyurethane foam membranes filled with humic acid-chitosan crosslinked gels for selective and simultaneous removal of dyes. J Colloid Interface Sci 2017; 505:67-78. [DOI: 10.1016/j.jcis.2017.05.075] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 05/22/2017] [Accepted: 05/23/2017] [Indexed: 10/19/2022]
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113
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Dong L, Wen C, Junxia Y, Yigang D. Synthesis of carboxyl-introduced chitosan with C 2 amine groups protected and its use in copper (II) removal. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:2095-2105. [PMID: 29068339 DOI: 10.2166/wst.2017.377] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A route for the formation of carboxyl-introduced chitosan (CI-CS) with C2 amine groups protected (CIAP-CS) was investigated to improve copper (II) adsorption. First, the C2 amine groups of the chitosan (CS) were protected via a Schiff-base reaction by benzaldehyde. Then the product was obtained by the introduction of pyromellitic dianhydride to the C6 hydroxyl groups on CS via epichlorohydrin. The last product was obtained by removing the Schiff base with dilute hydrochloride solution. CI-CS without C2 amine groups protected was directly synthesized as well. The adsorbents were characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD) and X-ray photoelectron spectrometer (XPS). The adsorption properties for copper (II) were investigated. FTIR spectroscopy and XPS clearly showed that most of the amine groups in CS were converted to -N = CH2 groups after the benzaldehyde treatment and that no cross-linking reactions with CS were involved; the HCl treatment after the cross-linking reaction effectively released nitrogen atoms protected into the form of the primary amine again. The results confirm that the CIAP-CS cross-linked with the new method had significantly greater adsorption capacities than the CI-CS cross-linked directly with CS. Mechanism study revealed that the increased adsorption performance is attributed to the large number of primary carboxyl and amine groups available on the surfaces of the CIAP-CS. The adsorption mechanism is based on ion exchange and chelating action, and the adsorption process is mainly chemisorption.
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Affiliation(s)
- Liu Dong
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
| | - Cheng Wen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China
| | - Yu Junxia
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China
| | - Ding Yigang
- Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China E-mail:
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114
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Majumder R, Sheikh L, Naskar A, Vineeta, Mukherjee M, Tripathy S. Depletion of Cr(VI) from aqueous solution by heat dried biomass of a newly isolated fungus Arthrinium malaysianum: A mechanistic approach. Sci Rep 2017; 7:11254. [PMID: 28900147 PMCID: PMC5595784 DOI: 10.1038/s41598-017-10160-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 07/27/2017] [Indexed: 11/09/2022] Open
Abstract
For the first time, the heat dried biomass of a newly isolated fungus Arthrinium malaysianum was studied for the toxic Cr(VI) adsorption, involving more than one mechanism like physisorption, chemisorption, oxidation-reduction and chelation. The process was best explained by the pseudo-second order kinetic model and Redlich-Peterson isotherm with maximum predicted biosorption capacity (Qm) of 100.69 mg g−1. Film-diffusion was the rate-controlling step and the adsorption was spontaneous, endothermic and entropy-driven. The mode of interactions between Cr(VI) ions and fungal biomass were investigated by several methods [Fourier Transform-Infrared Spectroscopy (FT-IR), X-ray Diffraction (XRD) and Energy-Dispersive X-ray spectroscopy (EDX)]. X-ray Photoelectron Spectroscopy (XPS) studies confirmed significant reduction of Cr(VI) into non-toxic Cr(III) species. Further, a modified methodology of Atomic Force Microscopy was successfully attempted to visualize the mycelial ultra-structure change after chromium adsorption. The influence of pH, biomass dose and contact time on Cr(VI) depletion were evaluated by Response Surface Model (RSM). FESEM-EDX analysis also exhibited arsenic (As) and lead (Pb) peaks on fungus surface upon treating with synthetic solutions of NaAsO2 and Pb(NO3)2 respectively. Additionally, the biomass could also remove chromium from industrial effluents, suggesting the fungal biomass as a promising adsorbent for toxic metals removal.
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Affiliation(s)
- Rajib Majumder
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, Kolkata, 700032, India
| | - Lubna Sheikh
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, Kolkata, 700032, India
| | - Animesh Naskar
- Department of Food Technology and Biochemical Engineering, Jadavpur University, Kolkata, 700032, India
| | - Vineeta
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, Kolkata, 700032, India
| | - Manabendra Mukherjee
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, Kolkata, 700064, India
| | - Sucheta Tripathy
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, Kolkata, 700032, India.
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115
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Mitra D, Li M, Kang ET, Neoh KG. Transparent Copper-Loaded Chitosan/Silica Antibacterial Coatings with Long-Term Efficacy. ACS APPLIED MATERIALS & INTERFACES 2017; 9:29515-29525. [PMID: 28792197 DOI: 10.1021/acsami.7b07700] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Bacteria-contaminated inanimate surfaces within hospitals and clinics result in transmission of pathogens via direct or indirect contact, leading to increased risk of healthcare-associated infections (HAI). The use of antibacterial coatings is a potential way of reducing the bacterial burden, but many surfaces such as instrument panels and monitors necessitate the coatings to be transparent while being highly antibacterial. In this work, silica nanoparticles (SiO2 NPs) were first grown over a layer of acrylated quaternized chitosan (AQCS) covalently immobilized on commercially available transparent poly(vinyl fluoride) (PVF) films. The SiO2 NPs then served as nanoreservoirs for adsorption of copper ions. The coated PVF films were transparent and reduced viable bacterial count by ∼99% and 100%, when incubated with a bacteria-loaded droplet for 60 and 120 min, respectively. The killing efficacy of these coatings, after wiping 100 times, with a deionized water-wetted cloth was reduced slightly to 97-98%. The stability of these coatings can be further improved with the deposition of another layer of cationic quaternized chitosan (QCS) over the negatively charged SiO2 NP layer, wherein the coatings maintained ∼99% killing efficacy even after 100 wipes. These coatings showed no significant toxicity to mammalian cells and, hence, can potentially be used in a clinical setting for reducing HAI.
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Affiliation(s)
- Debirupa Mitra
- Department of Chemical and Biomolecular Engineering, National University of Singapore , Kent Ridge, Singapore 117576
| | - Min Li
- Department of Chemical and Biomolecular Engineering, National University of Singapore , Kent Ridge, Singapore 117576
| | - En-Tang Kang
- Department of Chemical and Biomolecular Engineering, National University of Singapore , Kent Ridge, Singapore 117576
| | - Koon Gee Neoh
- Department of Chemical and Biomolecular Engineering, National University of Singapore , Kent Ridge, Singapore 117576
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116
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Wang G, Wang S, Sun W, Sun Z, Zheng S. Oxygen functionalized carbon nanocomposite derived from natural illite as adsorbent for removal of cationic and anionic dyes. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2017.05.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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117
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Wang B, Zhao L, Zhu W, Fang L, Ren F. Mussel-inspired nano-multilayered coating on magnesium alloys for enhanced corrosion resistance and antibacterial property. Colloids Surf B Biointerfaces 2017. [PMID: 28645044 DOI: 10.1016/j.colsurfb.2017.06.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Magnesium alloys are promising candidates for load-bearing orthopedic implants due to their biodegradability and mechanical resemblance to natural bone tissue. However, the high degradation rate and the risk of implant-associated infections pose grand challenges for their clinical applications. Herein, we developed a nano-multilayered coating strategy through polydopamine and chitosan assisted layer-by-layer assembly of osteoinductive carbonated apatite and antibacterial sliver nanoparticles on the surface of AZ31 magnesium alloys. The fabricated nano-multilayered coating can not only obviously enhance the corrosion resistance but also significantly increase the antibacterial activity and demonstrate better biocompatility of magnesium alloys.
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Affiliation(s)
- Bi Wang
- Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen, Guangdong 518055, China
| | - Liang Zhao
- Department of Polymer Science and Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Weiwei Zhu
- Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen, Guangdong 518055, China
| | - Liming Fang
- Department of Polymer Science and Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Fuzeng Ren
- Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen, Guangdong 518055, China.
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118
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Pourkarim S, Ostovar F, Mahdavianpour M, Moslemzadeh M. Adsorption of chromium(VI) from aqueous solution by Artist’s Bracket fungi. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1299179] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Saeed Pourkarim
- School of Health, Guilan University of Medical Sciences, Rasht, Iran
| | - Fariba Ostovar
- Department of Analytical Chemistry, Environmental Research Institute, Rasht, Iran
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119
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Velmurugan M, Chen SM. Synthesis and Characterization of Porous MnCo 2O 4 for Electrochemical Determination of Cadmium ions in Water Samples. Sci Rep 2017; 7:653. [PMID: 28381862 PMCID: PMC5429597 DOI: 10.1038/s41598-017-00748-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 03/09/2017] [Indexed: 12/01/2022] Open
Abstract
To utilize the maximum activity of nanomaterials, it was specifically synthesized by appropriate physicochemical properties. In that aspect, we have described the synthesis of porous MnCo2O4 by simple chemical route and applied for the selective detection of cadmium (Cd (II)). The as-prepared porous MnCo2O4 was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) adsorption isotherm, X-ray diffraction pattern analysis (XRD), Fourier transform infra-red spectroscopy (FT-IR), energy dispersive X-ray (EDX) and electrochemical techniques. The porous MnCo2O4 exhibited an excellent electrochemical behaviour and good analytical response towards the determination of Cd (II). Those analytical factors such as pH, deposition potential and deposition time are optimized by using differential pulse anodic stripping voltammetry (DPASV). A wide linear concentration range from 2.3 to 120 µg L-1, limit of detection (LOD) of 0.72 µg L-1 and the limit of quantification (LOQ) of 0.91 µg L-1 were achieved for determination of Cd (II). The selectivity of the developed sensor was explored in the presence of co-interfering ions. Also our sensor exhibits a good stability, reproducibility and repeatability. In addition, the practicability of proposed sensor was evaluated for the detection of Cd (II) in real water samples.
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Affiliation(s)
- Murugan Velmurugan
- National Taipei University of Technology, Taipei, 106, Taiwan, Republic of China
| | - Shen-Ming Chen
- National Taipei University of Technology, Taipei, 106, Taiwan, Republic of China.
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120
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de S. Gama M, Luna FMT, Albarelli JQ, Beppu MM, Vieira RS. Adsorption of copper on glass beads coated with chitosan: Stirred batch and fixed bed analysis. CAN J CHEM ENG 2017. [DOI: 10.1002/cjce.22813] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Marlon de S. Gama
- Universidade Federal do Ceará Depto. de Engenharia Química; Grupo de Pesquisa em Separações por Adsorção Campus do Pici, Bl. 709; Fortaleza CE 60.455-900 Brazil
| | - F. Murilo T. Luna
- Universidade Federal do Ceará Depto. de Engenharia Química; Grupo de Pesquisa em Separações por Adsorção Campus do Pici, Bl. 709; Fortaleza CE 60.455-900 Brazil
| | - Juliana Q. Albarelli
- Universidade Estadual de Campinas Faculdade de Engenharia Química; Av. Albert Einstein, 500; Campinas SP 13.083-852 Brazil
| | - Marisa M. Beppu
- Universidade Estadual de Campinas Faculdade de Engenharia Química; Av. Albert Einstein, 500; Campinas SP 13.083-852 Brazil
| | - Rodrigo S. Vieira
- Universidade Estadual de Campinas Faculdade de Engenharia Química; Av. Albert Einstein, 500; Campinas SP 13.083-852 Brazil
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121
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Liu B, Wang C, Liu D, He N, Deng X. Hg tolerance and biouptake of an isolated pigmentation yeast Rhodotorula mucilaginosa. PLoS One 2017; 12:e0172984. [PMID: 28253367 PMCID: PMC5333980 DOI: 10.1371/journal.pone.0172984] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 02/13/2017] [Indexed: 11/18/2022] Open
Abstract
A pigmented yeast R1 with strong tolerance to Hg2+ was isolated. Phylogenetic identification based on the analysis of 26S rDNA and ITS revealed R1 is a Rhodotorula mucilaginosa species. R1 was able to grow in the presence of 80 mg/L Hg2+, but the lag phase was much prolonged compared to its growth in the absence of Hg2+. The maximum Hg2+ binding capacity of R1 was 69.9 mg/g, and dead cells could bind 15% more Hg2+ than living cells. Presence of organic substances drastically reduced bioavailability of Hg2+ and subsequently decreased Hg2+ removal ratio from aqueous solution, but this adverse effect could be remarkably alleviated by the simultaneous process of cell propagation and Hg2+ biouptake with actively growing R1. Furthermore, among the functional groups involved in Hg2+ binding, carboxyl group contributed the most, followed by amino & hydroxyl group and phosphate group. XPS analysis disclosed the mercury species bound on yeast cells was HgCl2 rather than HgO or Hg0.
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Affiliation(s)
- Bing Liu
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen, China
| | - Chaogang Wang
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen, China
| | - Danxia Liu
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen, China
| | - Ning He
- Department of Chemical/Biochemical Engineering, Xiamen University, Xiamen, China
| | - Xu Deng
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen, China
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122
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Chang Y, Shen C, Li PY, Fang L, Tong ZZ, Min M, Xiong CH. Optimization of polyacrylonitrile–cysteine resin synthesis and its selective removal of Cu(II) in aqueous solutions. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2016.08.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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123
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Frantz TS, Silveira N, Quadro MS, Andreazza R, Barcelos AA, Cadaval TRS, Pinto LAA. Cu(II) adsorption from copper mine water by chitosan films and the matrix effects. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:5908-5917. [PMID: 28064395 DOI: 10.1007/s11356-016-8344-z] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Accepted: 12/26/2016] [Indexed: 06/06/2023]
Abstract
Adsorption of copper ions onto chitosan films was studied, and the matrix effect was evaluated using a synthetic solution and a real effluent from closed copper mine. Chitosan films were prepared by casting technique and characterized. The adsorption study was carried out by equilibrium isotherms, thermodynamics, and kinetics. The thermodynamic parameters indicated that the copper adsorption onto chitosan film was favorable, spontaneous, and exothermic, suggesting an increased randomness at the solid/solution interface. The matrix effect was evaluated in kinetic assays, where a synthetic solution and a real system were carried out at different stirring rates. The highest values of adsorption capacity reached in all stirring rates were about 20% lower in the real effluent, and this reduction in the competitiveness was due to the presence of other ions in the matrix of the real effluent. The maximum adsorption capacity of copper ions onto chitosan films for the synthetic solution was of 450 mg g-1, and the removal percentage was in the range from 78 to 96%, and these values for the real effluent were of 360 mg g-1 and removal ranging from 62 to 76%. The mapping done of ions present in the water adsorbed of the mine in the films showed that the same was homogeneously distributed in the films' surfaces.
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Affiliation(s)
- Tuanny S Frantz
- School of Chemistry and Food, Federal University of Rio Grande (FURG), FURG, km 8 Itália Avenue, Carreiros District, Rio Grande, RS, Brazil
| | - Nauro Silveira
- School of Chemistry and Food, Federal University of Rio Grande (FURG), FURG, km 8 Itália Avenue, Carreiros District, Rio Grande, RS, Brazil
| | - Maurízio S Quadro
- Engineering Department, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil
| | - Robson Andreazza
- Engineering Department, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil
| | - Amauri A Barcelos
- Engineering Department, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil
| | - Tito R S Cadaval
- School of Chemistry and Food, Federal University of Rio Grande (FURG), FURG, km 8 Itália Avenue, Carreiros District, Rio Grande, RS, Brazil
| | - Luiz A A Pinto
- School of Chemistry and Food, Federal University of Rio Grande (FURG), FURG, km 8 Itália Avenue, Carreiros District, Rio Grande, RS, Brazil.
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124
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Xu B, Zheng C, Zheng H, Wang Y, Zhao C, Zhao C, Zhang S. Polymer-grafted magnetic microspheres for enhanced removal of methylene blue from aqueous solutions. RSC Adv 2017. [DOI: 10.1039/c7ra06810g] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chitosan/magnetite composite microspheres were grafted with polymer by graft polymerization of 2-acrylamido-2-methylpropane sulfonic acid and acrylic acid onto their surface and then applied for the removal of methylene blue from aqueous solutions.
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Affiliation(s)
- Bincheng Xu
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- State Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Chaofan Zheng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- State Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Huaili Zheng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- State Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Yili Wang
- College of Environmental Science and Engineering
- Research Center for Water Pollution Source Control and Eco-remediation
- Beijing Forestry University
- Beijing 100083
- China
| | - Chun Zhao
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- State Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Chuanliang Zhao
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- State Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Shixin Zhang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- State Ministry of Education
- Chongqing University
- Chongqing 400045
- China
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125
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Yuan W, Zhang C, Wei H, Wang Q, Li K. In situ synthesis and immobilization of a Cu(ii)–pyridyl complex on silica microspheres as a novel Fenton-like catalyst for RhB degradation at near-neutral pH. RSC Adv 2017. [DOI: 10.1039/c7ra02916k] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A Cu(ii)–pyridyl complex was in situ synthesized and immobilized onto silica microspheres as a highly effective Fenton-like catalyst at near-neutral pH.
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Affiliation(s)
- Wenhua Yuan
- College of Chemistry & Material Science
- Key Laboratory of Synthetic and Natural Function Molecule Chemistry
- Ministry of Education
- Northwest University
- Xi'an 710127
| | - Chaoying Zhang
- College of Chemistry & Material Science
- Key Laboratory of Synthetic and Natural Function Molecule Chemistry
- Ministry of Education
- Northwest University
- Xi'an 710127
| | - Hong Wei
- State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Areas
- Xi'an University of Technology
- Xi'an 710048
- PR China
| | - Qinqin Wang
- College of Chemistry & Material Science
- Key Laboratory of Synthetic and Natural Function Molecule Chemistry
- Ministry of Education
- Northwest University
- Xi'an 710127
| | - Kebin Li
- College of Chemistry & Material Science
- Key Laboratory of Synthetic and Natural Function Molecule Chemistry
- Ministry of Education
- Northwest University
- Xi'an 710127
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126
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Dubey R, Bajpai J, Bajpai A. Chitosan-alginate nanoparticles (CANPs) as potential nanosorbent for removal of Hg (II) ions. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.enmm.2016.06.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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127
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Hybrid chitosan/polyaniline-polypyrrole biomaterial for enhanced adsorption and antimicrobial activity. J Colloid Interface Sci 2016; 490:488-496. [PMID: 27918986 DOI: 10.1016/j.jcis.2016.11.082] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/20/2016] [Accepted: 11/23/2016] [Indexed: 02/03/2023]
Abstract
In this work, chitosan (CS) functionalized polyaniline-polypyrrole (Pani-Ppy) copolymer (CS/Pani-Ppy) was synthesized applying a facile one pot method for the enhanced adsorption of Zn(II) and antimicrobial activity for E. coli and E. agglomerans. The synthesized materials were characterized using scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform inferred spectroscopy and X-ray photoelectron spectroscopy. The adsorption of the Zn(II) on the synthesized materials was highly dependent on the pH of the solution, the initial metal ion concentration, and temperature. The adsorption of Zn(II) on the studied materials was as follows: CS/Pani-Ppy>Pani-Ppy>Ppy>Pani>CS. The results reveal that adsorption of Zn(II) follows the Langmuir adsorption isotherm, and that chemisorption occurs through pendant and bridging interactions, with active adsorbent sites. Thermodynamic results show the adsorption is spontaneous and exothermic in nature. The synthesized materials show excellent antimicrobial activity against E. coli and E. agglomerans bacterial organisms, and an approximately 100% decline in the viability of both strains was observed with CS/Pani-Ppy and Pani-Ppy. The order of antimicrobial activity for the synthesized materials was as follows: CS/Ppy-Pani>Ppy-Pani>Ppy>Pani>CS. The results show that the greater activity of CS/Ppy-Pani resulted from the electrostatic interaction between positively charged amine groups and negatively charged bacteria.
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128
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Superb adsorption capacity and mechanism of poly(1-amino-5-chloroanthraquinone) nanofibrils for lead and trivalent chromium ions. REACT FUNCT POLYM 2016. [DOI: 10.1016/j.reactfunctpolym.2016.07.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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129
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Mohan A, Neeroli Kizhakayil R. Graphene-Rhodamine Nanoprobe for Colorimetric and Fluorimetric Hg(2+) Ion Assay. ACS APPLIED MATERIALS & INTERFACES 2016; 8:14125-14132. [PMID: 27195915 DOI: 10.1021/acsami.6b03904] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This article reveals the first ever prospective application of Graphene-Rhodamine array (GRH) as a colorimetric and fluorimetric sensor for Hg(2+) ions. The duality of Graphene to undergo π-π and dispersive interactions with Rhodamine as well as to act as a selective adsorbent for Hg(2+) is conceptualized in this study. These interactions lead to decrease in absorbance of the dye in the presence of graphene, which is restored when kept in contact with Hg(2+) ions. The feasibility of the mechanism has been proved using EDTA as the coordinating ligand. It is noteworthy that all the optical variations occurred in the visible scale of the electromagnetic spectrum. The GRH array exhibited higher sensitivity toward the target ion with a limit of detection of 2 ppb. A perfect linear variation of absorbance at 554 nm with Hg(2+) concentration was observed in 0-1000 nM range, enabling the use of the system as a quantitative sensor for the test ion. The commendable selectivity of the array toward Hg(2+) ion has been investigated by observing the optical response in the presence of other environmentally relevant metal ions. A reversible turn off and turn on INHIBIT logic gate has been proposed which extends the scope of the designed array for the development of automated chemical systems. The fluorescence resonance energy transfer (FRET) ability of graphene paves the backbone for the fluorimetric detection. Fluorimetric strategy yielded a much lower limit of detection of 380 ppt using this probe, which makes a significant advance in trace detection of Hg(2+) ions.
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Affiliation(s)
- Anju Mohan
- Department of Chemistry, University of Calicut , Kerala-673 635, India
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130
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Arus AV, Tahir MN, Sennour R, Shiao TC, Sallam LM, Nistor ID, Roy R, Azzouz A. Cu0and Pd0loaded Organo-Bentonites as Sponge-like Matrices for Hydrogen Reversible Capture at Ambient Conditions. ChemistrySelect 2016. [DOI: 10.1002/slct.201600366] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Alisa V. Arus
- Department of Chemistry Nanoqam; University of Quebec at Montreal; CP. 8888 Succ. Centre-ville Montreal (Qc) H3C3P8 Canada
- Laboratory of Catalysis and Microporous Materials; University V. Alecsandri of Bacau; Calea Marasesti Bacau Romania
| | - M. Nazir Tahir
- Department of Chemistry Nanoqam; University of Quebec at Montreal; CP. 8888 Succ. Centre-ville Montreal (Qc) H3C3P8 Canada
| | - Radia Sennour
- Department of Chemistry Nanoqam; University of Quebec at Montreal; CP. 8888 Succ. Centre-ville Montreal (Qc) H3C3P8 Canada
| | - Tze C. Shiao
- Department of Chemistry Nanoqam; University of Quebec at Montreal; CP. 8888 Succ. Centre-ville Montreal (Qc) H3C3P8 Canada
| | - Lamyaa M. Sallam
- Department of Chemistry Nanoqam; University of Quebec at Montreal; CP. 8888 Succ. Centre-ville Montreal (Qc) H3C3P8 Canada
| | - Ileana D. Nistor
- Laboratory of Catalysis and Microporous Materials; University V. Alecsandri of Bacau; Calea Marasesti Bacau Romania
| | - René Roy
- Department of Chemistry Nanoqam; University of Quebec at Montreal; CP. 8888 Succ. Centre-ville Montreal (Qc) H3C3P8 Canada
| | - Abdelkrim Azzouz
- Department of Chemistry Nanoqam; University of Quebec at Montreal; CP. 8888 Succ. Centre-ville Montreal (Qc) H3C3P8 Canada
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131
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Ramrakhiani L, Ghosh S, Majumdar S. Surface Modification of Naturally Available Biomass for Enhancement of Heavy Metal Removal Efficiency, Upscaling Prospects, and Management Aspects of Spent Biosorbents: A Review. Appl Biochem Biotechnol 2016; 180:41-78. [PMID: 27097928 DOI: 10.1007/s12010-016-2083-y] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 04/10/2016] [Indexed: 11/24/2022]
Abstract
Heavy metal pollution in water emerges as a severe socio-environmental problem originating primarily from the discharge of industrial wastewater. In view of the toxic, non-biodegradable, and persistent nature of most of the heavy metal ions, remediation of such components becomes an absolute necessity. Biosorption is an emerging tool for bioremediation that has gained momentum for employing low-cost biological materials with effective metal binding capacities. Even though biological materials possess excellent metal adsorption abilities, they show poor mechanical strength and low rigidity. Other disadvantages include solid-liquid separation problems, possible biomass swelling, lower efficiency for regeneration or reuse, and frequent development of high pressure drop in the column mode that limits its applications under real conditions. To improve the biosorption efficiency, biomasses need to be modified with a simple technique for selective/multi-metal adsorption. This review is intended to cover discussion on biomass modification for enhanced biosorption efficiency, mechanism studies using various instrumental/analytical techniques, and future direction for research and development including the fate of spent biosorbent. In most of the previously published researches, difficulty of the process in scaling up has not been addressed. The current article outlines the application potential of biosorbents in the development of hybrid technology integrated with membrane processes for water and wastewater treatment in industrial scale.
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Affiliation(s)
- Lata Ramrakhiani
- Ceramic Membrane Division, CSIR-Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata, 700 032, India
| | - Sourja Ghosh
- Ceramic Membrane Division, CSIR-Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata, 700 032, India.
| | - Swachchha Majumdar
- Ceramic Membrane Division, CSIR-Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata, 700 032, India
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132
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Yu JG, Yue BY, Wu XW, Liu Q, Jiao FP, Jiang XY, Chen XQ. Removal of mercury by adsorption: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:5056-5076. [PMID: 26620868 DOI: 10.1007/s11356-015-5880-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 11/24/2015] [Indexed: 06/05/2023]
Abstract
Due to natural and production activities, mercury contamination has become one of the major environmental problems over the world. Mercury contamination is a serious threat to human health. Among the existing technologies available for mercury pollution control, the adsorption process can get excellent separation effects and has been further studied. This review is attempted to cover a wide range of adsorbents that were developed for the removal of mercury from the year 2011. Various adsorbents, including the latest adsorbents, are presented along with highlighting and discussing the key advancements on their preparation, modification technologies, and strategies. By comparing their adsorption capacities, it is evident from the literature survey that some adsorbents have shown excellent potential for the removal of mercury. However, there is still a need to develop novel, efficient adsorbents with low cost, high stability, and easy production and manufacture for practical utility.
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Affiliation(s)
- Jin-Gang Yu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China.
| | - Bao-Yu Yue
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China
| | - Xiong-Wei Wu
- College of Science, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Qi Liu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China
| | - Fei-Peng Jiao
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China
| | - Xin-Yu Jiang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China
| | - Xiao-Qing Chen
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China
- Collaborative Innovation Center of Resource-Conserving and Environment-Friendly Society and Ecological Civilization, Changsha, Hunan, 410083, China
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133
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Biswal A, Minakshi M, Tripathy BC. Probing the electrochemical properties of biopolymer modified EMD nanoflakes through electrodeposition for high performance alkaline batteries. Dalton Trans 2016; 45:5557-67. [PMID: 26912087 DOI: 10.1039/c6dt00287k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the present work, a novel biopolymer approach has been made to electrodeposit manganese dioxide from manganese sulphate in a sulphuric acid bath containing chitosan in the absence and presence of glutaraldehyde as a cross-linking agent. Galvanostatically synthesised electrolytic manganese dioxide (EMD) nanoflakes were used as electrode materials and their electrochemical properties with the influence of biopolymer chitosan were systematically characterized. The structural determination, surface morphology and porosity of nanostructured EMD were evaluated using X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy and nitrogen adsorption-desorption techniques. The results obtained were compared with that of blank EMD (polymer free). The results indicated that the EMD having chitosan cross-linked with glutaraldehyde possesses a reduced particle size and more porous structure than the blank and EMDs synthesized in the presence of chitosan but without glutaraldehyde. The results revealed that chitosan was unable to play any significant role on its own but chitosan in the presence of glutaraldehyde forms a cross-linking structure, which in turn influences the nucleation and growth of the EMDs during electrodeposition. EMDs obtained in the presence of chitosan (1 g dm(-3)) and glutaraldehyde (1% glutaraldehyde) exhibited a reversible and better discharge capacity upon cycling than the blank which showed its typical capacity fading behaviour with cycling. In addition, EMD synthesized in the presence of 1 g dm(-3) chitosan and 2% glutaraldehyde exhibited a superior electrochemical performance than the blank and lower amounts (1%; 1.5%) of glutaraldehyde, showing a stable discharge capacity of 60 mA h g(-1) recorded up to 40 cycles in alkaline KOH electrolyte for a Zn-MnO2 system. Our results demonstrate the potential of using polymer modified EMDs as a new generation of alkaline battery materials. The XPS data show that a surface functional moiety arising from the cross-linked chitosan enhances the electrochemical properties of the Zn-MnO2 system.
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Affiliation(s)
- Avijit Biswal
- School of Engineering and Information Technology, Murdoch University, WA 6150, Australia.
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134
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Ramrakhiani L, Ghosh S, Sarkar S, Majumdar S. Heavy metal biosorption in multi component system on dried activated sludge: investigation of adsorption mechanism by surface characterization. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.matpr.2016.10.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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135
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Fabrication and Characterization of Chitosan Nanoparticle-Incorporated Quaternized Poly(Vinyl Alcohol) Composite Membranes as Solid Electrolytes for Direct Methanol Alkaline Fuel Cells. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2015.11.117] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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136
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Liu SQ, Zhou SS, Chen ZG, Liu CB, Chen F, Wu ZY. An artificial photosynthesis system based on CeO2 as light harvester and N-doped graphene Cu(II) complex as artificial metalloenzyme for CO2 reduction to methanol fuel. CATAL COMMUN 2016. [DOI: 10.1016/j.catcom.2015.10.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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137
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Hadi P, Ning C, Kubicki JD, Mueller K, Fagan JW, Luo Z, Weng L, McKay G. Sustainable development of a surface-functionalized mesoporous aluminosilicate with ultra-high ion exchange efficiency. Inorg Chem Front 2016. [DOI: 10.1039/c5qi00182j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present work employs a facile hydroxylation technique to efficiently functionalize the surface of a waste-derived aluminosilicate for ultra-high heavy metal uptakeviaion exchange.
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Affiliation(s)
- Pejman Hadi
- Chemical and Biomolecular Engineering Department
- Hong Kong University of Science and Technology
- Kowloon
- China
| | - Chao Ning
- Chemical and Biomolecular Engineering Department
- Hong Kong University of Science and Technology
- Kowloon
- China
| | - James D. Kubicki
- Department of Geological Sciences
- University of Texas at El Paso
- El Paso
- USA
| | - Karl Mueller
- Department of Chemistry
- The Pennsylvania State University
- University Park
- USA
- Physical and Computational Sciences Directorate
| | - Jonathan W. Fagan
- Department of Chemistry
- The Pennsylvania State University
- University Park
- USA
| | - Zhengtang Luo
- Chemical and Biomolecular Engineering Department
- Hong Kong University of Science and Technology
- Kowloon
- China
| | - Lutao Weng
- Chemical and Biomolecular Engineering Department
- Hong Kong University of Science and Technology
- Kowloon
- China
- Materials Characterization and Preparation Facility
| | - Gordon McKay
- Chemical and Biomolecular Engineering Department
- Hong Kong University of Science and Technology
- Kowloon
- China
- Division of Sustainable Development
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138
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Huang G, Yuan RX, Peng Y, Chen XF, Zhao SK, Wei SJ, Guo WX, Chen X. Oxygen oxidation of ethylbenzene over manganese porphyrin is promoted by the axial nitrogen coordination in powdered chitosan. RSC Adv 2016. [DOI: 10.1039/c6ra07789g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A less wasteful production method of oxidation ethylbenzene to acetophenone and phenethyl alcohol was adviced. It revealed an important role in tuning catalytic reactivity of metalloporphyrins by the axial ligand for oxidation of hydrocarbon.
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Affiliation(s)
- Guan Huang
- College of Chemistry and Chemical Engineering
- Guangxi University
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development
- Nanning 530004
- China
| | - Ru Xun Yuan
- College of Chemistry and Chemical Engineering
- Guangxi University
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development
- Nanning 530004
- China
| | - Yan Peng
- College of Chemistry and Chemical Engineering
- Guangxi University
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development
- Nanning 530004
- China
| | - Xiang Feng Chen
- College of Chemistry and Chemical Engineering
- Guangxi University
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development
- Nanning 530004
- China
| | - Shu Kai Zhao
- College of Chemistry and Chemical Engineering
- Guangxi University
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development
- Nanning 530004
- China
| | - Su Juan Wei
- College of Chemistry and Chemical Engineering
- Guangxi University
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development
- Nanning 530004
- China
| | - Wen Xin Guo
- College of Chemistry and Chemical Engineering
- Guangxi University
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development
- Nanning 530004
- China
| | - Xi Chen
- College of Chemistry and Chemical Engineering
- Guangxi University
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development
- Nanning 530004
- China
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139
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Liu Z, Li K, Zhang X, Ge B, Pu L. Influence of different morphology of three-dimensional Cu(x)O with mixed facets modified air-cathodes on microbial fuel cell. BIORESOURCE TECHNOLOGY 2015; 195:154-161. [PMID: 26122090 DOI: 10.1016/j.biortech.2015.06.077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 06/16/2015] [Accepted: 06/17/2015] [Indexed: 06/04/2023]
Abstract
Three kinds of three-dimensional (3D) CuxO catalysts were prepared to modify activated carbon air-cathode using a facile electrochemical method with addition of surfactants. The maximum power density of MFC using SC-Cu air cathode (added sodium citrate into the electrolyte solution in electrodeposition process) was 1550±47 mW m(-2), almost 77% higher than AC cathode. Specifically, the charge transfer resistance significantly decreased by 89% from 9.3980 Ω to 1.0640 Ω compared to the control. Lumphy and mutually embedded filmy sheet structure were observed in SEM, which provided sufficient active sites for oxygen adsorption and diffusion. In XRD and TEM result, CuxO with mixed facets showed special structure which had a better performance. Crystallization condition of electrodeposited materials played a significant role in their nature electrochemical properties, morphology controlled by surfactant of CuxO exhibited high properties on the air-cathode MFC.
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Affiliation(s)
- Ziqi Liu
- The College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Kexun Li
- The College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Xi Zhang
- The College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Baochao Ge
- The College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Liangtao Pu
- The College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
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140
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Xu Y, Dang Q, Liu C, Yan J, Fan B, Cai J, Li J. Preparation and characterization of carboxyl-functionalized chitosan magnetic microspheres and submicrospheres for Pb2+ removal. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.06.028] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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141
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Mao C, Imtiaz SA, Zhang Y. Competitive adsorption of Ag (I) and Cu (II) by tripolyphosphate crosslinked chitosan beads. J Appl Polym Sci 2015. [DOI: 10.1002/app.42717] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Chunxia Mao
- Department of Process Engineering, Faculty of Engineering & Applied Science; Memorial University of Newfoundland; St John's, NL A1B 3X5 Canada
| | - Syed Ahmad Imtiaz
- Department of Process Engineering, Faculty of Engineering & Applied Science; Memorial University of Newfoundland; St John's, NL A1B 3X5 Canada
| | - Yan Zhang
- Department of Process Engineering, Faculty of Engineering & Applied Science; Memorial University of Newfoundland; St John's, NL A1B 3X5 Canada
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142
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Kyzas GZ, Kostoglou M. Swelling–adsorption interactions during mercury and nickel ions removal by chitosan derivatives. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.05.024] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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143
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Santhana Krishna Kumar A, Jiang SJ. Preparation and characterization of exfoliated graphene oxide–l-cystine as an effective adsorbent of Hg(ii) adsorption. RSC Adv 2015. [DOI: 10.1039/c4ra12564a] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hg(ii) adsorption involves,l-cystine bears amino group (–NH2) could interact with GO hydroxyl and carboxyl groups through covalent bond interaction.
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Affiliation(s)
| | - Shiuh-Jen Jiang
- Department of Chemistry
- National Sun Yat-sen University
- Kaohsiung 80424, Taiwan
- Department of Medical Laboratory Science and Biotechnology
- Kaohsiung Medical University
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144
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Dai S, Peng B, Zhang L, Chai L, Wang T, Meng Y, Li X, Wang H, Luo J. Sustainable synthesis of hollow Cu-loaded poly(m-phenylenediamine) particles and their application for arsenic removal. RSC Adv 2015. [DOI: 10.1039/c4ra16499g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new Cu-catalyzed air oxidation method was successfully developed to prepare Cu-loaded poly(m-phenylenediamine) (PmPD) with monomer conversion rates close to 100%.
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Affiliation(s)
- Shuo Dai
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
| | - Bing Peng
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
- National Research Centre for Heavy Metal Pollution Prevention & Control
| | - Liyuan Zhang
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
| | - Liyuan Chai
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
- National Research Centre for Heavy Metal Pollution Prevention & Control
| | - Ting Wang
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
| | - Yun Meng
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
| | - Xiaorui Li
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
| | - Haiying Wang
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
- National Research Centre for Heavy Metal Pollution Prevention & Control
| | - Jian Luo
- School of Civil and Environmental Engineering
- Georgia Institute of Technology
- Atlanta
- USA
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145
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Yong SK, Shrivastava M, Srivastava P, Kunhikrishnan A, Bolan N. Environmental applications of chitosan and its derivatives. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2015; 233:1-43. [PMID: 25367132 DOI: 10.1007/978-3-319-10479-9_1] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Chitosan originates from the seafood processing industry and is one of the most abundant of bio-waste materials. Chitosan is a by-product of the alkaline deacetylation process of chitin. Chemically, chitosan is a polysaccharide that is soluble in acidic solution and precipitates at higher pHs. It has great potential for certain environmental applications, such as remediation of organic and inorganic contaminants, including toxic metals and dyes in soil, sediment and water, and development of contaminant sensors. Traditionally, seafood waste has been the primary source of chitin. More recently, alternative sources have emerged such as fungal mycelium, mushroom and krill wastes, and these new sources of chitin and chitosan may overcome seasonal supply limitations that have existed. The production of chitosan from the above-mentioned waste streams not only reduces waste volume, but alleviates pressure on landfills to which the waste would otherwise go. Chitosan production involves four major steps, viz., deproteination, demineralization, bleaching and deacetylation. These four processes require excessive usage of strong alkali at different stages, and drives chitosan's production cost up, potentially making the application of high-grade chitosan for commercial remediation untenable. Alternate chitosan processing techniques, such as microbial or enzymatic processes, may become more cost-effective due to lower energy consumption and waste generation. Chitosan has proved to be versatile for so many environmental applications, because it possesses certain key functional groups, including - OH and -NH2 . However, the efficacy of chitosan is diminished at low pH because of its increased solubility and instability. These deficiencies can be overcome by modifying chitosan's structure via crosslinking. Such modification not only enhances the structural stability of chitosan under low pH conditions, but also improves its physicochemical characteristics, such as porosity, hydraulic conductivity, permeability, surface area and sorption capacity. Crosslinked chitosan is an excellent sorbent for trace metals especially because of the high flexibility of its structural stability. Sorption of trace metals by chitosan is selective and independent of the size and hardness of metal ions, or the physical form of chitosan (e.g., film, powder and solution). Both -OH and -NH2 groups in chitosan provide vital binding sites for complexing metal cations. At low pH, -NH3 + groups attract and coagulate negatively charged contaminants such as metal oxyanions, humic acids and dye molecules. Grafting certain functional molecules into the chitin structure improves sorption capacity and selectivity for remediating specific metal ions. For example, introducing sulfur and nitrogen donor ligands to chitosan alters the sorption preference for metals. Low molecular weight chitosan derivatives have been used to remediate metal contaminated soil and sediments. They have also been applied in permeable reactive barriers to remediate metals in soil and groundwater. Both chitosan and modified chitosan have been used to phytoremediate metals; however, the mechanisms by which they assist in mobilizing metals are not yet well understood. In addition, microbes have been used in combination with chitosan to remediate metals (e.g., Cu and Zn) in contaminated soils. Chitosan has also been used to remediate organic contaminants, such as oil-based wastewater, dyes, tannins, humic acids, phenols, bisphenoi-A, p-benzoquinone, organo-phosphorus insecticides, among others. Chitosan has also been utilized to develop optical and electrochemical sensors for in-situ detection of trace contaminants. In sensor technology, naturally-derived chitosan is used primarily as an immobilizing agent that results from its enzyme compatibility, and stabilizing effect on nanoparticles. Contaminant-sensing agents, such as enzymes, microbes and nanoparticles, have been homogeneously immobilized in chitosan gels by using coagulating (e.g., alginate, phosphate) or crosslinking agents (e.g., GA, ECH). Such immobilization maintains the stability of sensing elements in the chitosan gel phase, and prevents inactivation and loss of the sensing agent. In this review, we have shown that chitosan, an efficient by-product of a waste biomaterial, has great potential for many environmental applications. With certain limitations, chitosan and its derivatives can be used for remediating contaminated soil and wastewater. Notwithstanding, further research is needed to enhance the physicochemical properties of chitosan and mitigate its deficiencies.
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Affiliation(s)
- Soon Kong Yong
- Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA, 5095, Australia,
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146
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Jiang W, Chen X, Pan B, Zhang Q, Teng L, Chen Y, Liu L. Spherical polystyrene-supported chitosan thin film of fast kinetics and high capacity for copper removal. JOURNAL OF HAZARDOUS MATERIALS 2014; 276:295-301. [PMID: 24910907 DOI: 10.1016/j.jhazmat.2014.05.032] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 04/26/2014] [Accepted: 05/13/2014] [Indexed: 06/03/2023]
Abstract
In order to accelerate the kinetics and improve the utilization of the surface active groups of chitosan (CS) for heavy metal ion removal, sub-micron-sized polystyrene supported chitosan thin-film was synthesized by the electrostatic assembly method. Glutaraldehyde was used as cross-linking agent. Chitosan thin-film was well coated onto the surface of the polystyrene (PS) beads characterized by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX). Their adsorption toward Cu(II) ions was investigated as a function of solution pH, degree of cross-linking, equilibrium Cu(II) ions concentration and contact time. The maximum adsorptive capacity of PS-CS was 99.8 mg/g in the adsorption isotherm study. More attractively, the adsorption equilibrium was achieved in 10 min, which showed superior properties among similar adsorbents. Continuous adsorption-desorption cyclic results demonstrated that Cu(II)-loaded PS-CS can be effectively regenerated by a hydrochloric acid solution (HCl), and the regenerated composite beads could be employed for repeated use without significant capacity loss, indicating the good stability of the adsorbents. The XPS analysis confirmed that the adsorption process was due to surface complexes with atoms of chitosan. Generally, PS beads could be employed as a promising host to fabricate efficient composites that originated from chitosan or other bio-sorbents for environmental remediation.
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Affiliation(s)
- Wei Jiang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
| | - Xubin Chen
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Bingcai Pan
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Quanxing Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Long Teng
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Yufan Chen
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Lu Liu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
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147
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Dong C, Chen W, Liu C, Liu Y, Liu H. Synthesis of magnetic chitosan nanoparticle and its adsorption property for humic acid from aqueous solution. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.01.069] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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148
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Allouche FN, Guibal E, Mameri N. Preparation of a new chitosan-based material and its application for mercury sorption. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.01.025] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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149
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Santhana Krishna Kumar A, Uday Kumar C, Rajesh V, Rajesh N. Microwave assisted preparation of n-butylacrylate grafted chitosan and its application for Cr(VI) adsorption. Int J Biol Macromol 2014; 66:135-43. [PMID: 24530325 DOI: 10.1016/j.ijbiomac.2014.02.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 01/28/2014] [Accepted: 02/03/2014] [Indexed: 10/25/2022]
Abstract
Biopolymers such as chitosan possess excellent properties suited for varied applications. In this work, we describe a novel microwave assisted method for the preparation of n-butylacrylate grafted chitosan adsorbent and its utility for the adsorption of chromium(VI). A 3 min irradiation time was enough to prepare the adsorbent, and techniques such as FT-IR, powder XRD, SEM and EDS were used for comprehensive characterization. The adsorption was effective at pH 3.5 with 25 mL of 20 ppm Cr(VI) solution. Langmuir, Freundlich, Dubinin-Radushkevich, Temkin, Elovich and Redlich isotherms were studied in detail. The ΔG, ΔH and ΔS parameters were evaluated to understand the adsorption thermodynamics. The adsorption involves the interaction of Cr(VI) with the hydroxyl and amino groups in chitosan.
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Affiliation(s)
- A Santhana Krishna Kumar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist, 500 078 AP, India
| | - Chinta Uday Kumar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist, 500 078 AP, India
| | - Vidya Rajesh
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad campus, Jawahar Nagar, Shameerpet Mandal R.R. Dist, 500 078 AP, India
| | - N Rajesh
- Department of Chemistry, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist, 500 078 AP, India.
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150
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Kundu D, Hazra C, Chatterjee A, Chaudhari A, Mishra S. Retracted Article: Sonochemical synthesis of poly(methyl methacrylate) core–surfactin shell nanoparticles for recyclable removal of heavy metal ions and its cytotoxicity. RSC Adv 2014. [DOI: 10.1039/c4ra03008g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
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