51
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Torres F, Arroyo J, Troncoso O. Bacterial cellulose nanocomposites: An all-nano type of material. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 98:1277-1293. [DOI: 10.1016/j.msec.2019.01.064] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 01/14/2019] [Accepted: 01/14/2019] [Indexed: 10/27/2022]
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52
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Kumar N, Kardam A, Jain VK, Nagpal S. A rapid, reusable polyaniline-impregnated nanocellulose composite-based system for enhanced removal of chromium and cleaning of waste water. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1600552] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Nitesh Kumar
- Amity Institute for Advanced Research and Studies (Materials & Devices), Amity University, Noida, India
| | - Abhishek Kardam
- Amity Institute for Advanced Research and Studies (Materials & Devices), Amity University, Noida, India
| | - VK Jain
- Amity Institute for Advanced Research and Studies (Materials & Devices), Amity University, Noida, India
| | - Suman Nagpal
- Amity Institute for Advanced Research and Studies (Materials & Devices), Amity University, Noida, India
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53
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In Situ Synthesis of a Stable Fe₃O₄@Cellulose Nanocomposite for Efficient Catalytic Degradation of Methylene Blue. NANOMATERIALS 2019; 9:nano9020275. [PMID: 30781498 PMCID: PMC6410190 DOI: 10.3390/nano9020275] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 02/10/2019] [Accepted: 02/13/2019] [Indexed: 11/17/2022]
Abstract
To rapidly obtain a stable Fe₃O₄@cellulose heterogeneous Fenton catalyst, a novel in situ chemical co-precipitation method was developed. Compared with mechanical activation (MA)-pretreated cellulose (MAC), MA + FeCl₃ (MAFC)-pretreated cellulose (MAFCC) was more easily dissolved and uniformly distributed in NaOH/urea solvent. MAFCC and MAC solutions were used as precipitators to prepare Fe₃O₄@MAFCC and Fe₃O₄@MAC nanocomposites, respectively. MAFCC showed stronger interaction and more uniform combination with Fe₃O₄ nanoparticles than MAC, implying that MAFC pretreatment enhanced the accessibility, reactivity, and dissolving capacity of cellulose thus, provided reactive sites for the in situ growth of Fe₃O₄ nanoparticles on the regenerated cellulose. Additionally, the catalytic performance of Fe₃O₄@MAFCC nanocomposite was evaluated by using for catalytic degradation of methylene blue (MB), and Fe₃O₄@MAC nanocomposite and Fe₃O₄ nanoparticles were used for comparative studies. Fe₃O₄@MAFCC nanocomposite exhibited superior catalytic activity for the degradation and mineralization of MB in practical applications. After ten cycles, the structure of Fe₃O₄@MAFCC nanocomposite was not significantly changed owing to the strong interaction between MAFCC and Fe₃O₄ nanoparticles. This study provides a green pathway to the fabrication of a stable nanocomposite catalyst with high catalytic performance and reusability for the degradation of organic pollutants.
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54
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de Carvalho Eufrásio Pinto M, David da Silva D, Amorim Gomes AL, Leite VDSA, Fialho e Moraes AR, Ferreira de Novais R, Tronto J, Pinto FG. Film based on magnesium impregnated biochar/cellulose acetate for phosphorus adsorption from aqueous solution. RSC Adv 2019; 9:5620-5627. [PMID: 35515895 PMCID: PMC9060768 DOI: 10.1039/c8ra06655h] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 01/25/2019] [Indexed: 11/21/2022] Open
Abstract
New hybrid film formed by biopolymer cellulose acetate and biochar for P adsorption in aqueous solution.
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Affiliation(s)
| | | | | | | | | | | | - Jairo Tronto
- Federal University of Viçosa
- Institute of Exact Science
- Campus de Rio Paranaíba
- Brazil
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55
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Abouzeid RE, Khiari R, El-Wakil N, Dufresne A. Current State and New Trends in the Use of Cellulose Nanomaterials for Wastewater Treatment. Biomacromolecules 2018; 20:573-597. [PMID: 30020778 DOI: 10.1021/acs.biomac.8b00839] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Nanotechnology has been identified as having great potential for improving the efficiency of water prevention and purification while reducing costs. In this field, two applications of nanocellulose have generated attention and have proven to be a sound strategy as an adsorbent and as a membrane for the removal of contaminants. This potential is attributed to its high aspect ratio, high specific surface area, high capacity retention, and environmental inertness. In addition to the aforementioned advantages, the presence of active sites allows the incorporation of chemical moieties that may enhance the binding efficiency of pollutants to the surface. This review paper intends to understand how nanocellulose affects the adsorption behavior of water pollutants, e.g., heavy metal ions, microbes, dyes, and organic molecules, and is divided in two parts. First, a general overview of the different strategies for the preparation of nanocellulose is described, and its specific properties are reported. The second section reports some of its application as adsorbent nanomaterial or separation membrane. It appears that the use of nanocellulose for these applications is very promising for wastewater treatment industries.
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Affiliation(s)
- Ragab E Abouzeid
- Cellulose and Paper Department , National Research Centre , 33 El-Behouth Street , Dokki 12622 , Egypt.,Université Grenoble Alpes, CNRS , Grenoble INP, LGP2 , F-38000 Grenoble , France
| | - Ramzi Khiari
- Université Grenoble Alpes, CNRS , Grenoble INP, LGP2 , F-38000 Grenoble , France.,University of Monastir, Faculty of Sciences , UR13 ES 63-Research Unity of Applied Chemistry & Environment , 5000 Monastir , Tunisia.,Higher Institute of Technological Studies of Ksar Hellal , Department of Textile , 5070 Monastir , Tunisia
| | - Nahla El-Wakil
- Cellulose and Paper Department , National Research Centre , 33 El-Behouth Street , Dokki 12622 , Egypt
| | - Alain Dufresne
- Université Grenoble Alpes, CNRS , Grenoble INP, LGP2 , F-38000 Grenoble , France
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56
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Laromaine A, Tronser T, Pini I, Parets S, Levkin PA, Roig A. Free-standing three-dimensional hollow bacterial cellulose structures with controlled geometry via patterned superhydrophobic-hydrophilic surfaces. SOFT MATTER 2018; 14:3955-3962. [PMID: 29736513 DOI: 10.1039/c8sm00112j] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Bacteria can produce cellulose, one of the most abundant biopolymer on earth, and emerge as an interesting candidate to fabricate advanced materials. Cellulose produced by Komagataeibacter Xylinus, a bacterial strain, is a pure water insoluble biopolymer, without hemicellulose or lignin. Bacterial cellulose (BC) exhibits a nanofibrous porous network microstructure with high strength, low density and high biocompatibility and it has been proposed as cell scaffold and wound healing material. The formation of three dimensional (3D) cellulose self-standing structures is not simple. It either involves complex multi-step synthetic procedures or uses chemical methods to dissolve cellulose and remold it. Here we present an in situ single-step method to produce self-standing 3D-BC structures with controllable wall thickness, size and geometry in a reproducible manner. Parameters such as hydrophobicity of the surfaces, volume of the inoculum and time of culture define the resulting 3D-BC structures. Hollow spheres and convex domes can be easily obtained by changing the surface wettability. The potential of these structures as a 3D cell scaffold is exemplified supporting the growth of mouse embryonic stem cells within a hollow spherical BC structure, indicating its biocompatibility and future prospective.
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Affiliation(s)
- Anna Laromaine
- Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Catalunya, Spain.
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57
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Zhang BX, Zhang Y, Luo Z, Han W, Qiu W, Zhao T. Hierarchically Porous Zirconia Monolith Fabricated from Bacterial Cellulose and Preceramic Polymer. ACS OMEGA 2018; 3:4688-4694. [PMID: 31458690 PMCID: PMC6641484 DOI: 10.1021/acsomega.8b00098] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/16/2018] [Indexed: 06/10/2023]
Abstract
A hierarchically porous zirconia (ZrO2) monolith was successfully fabricated by using bacterial cellulose (BC) as a biotemplate and preceramic polymer as a zirconium resource, via freeze-drying and two-step calcination process. Images of scanning electron microscopy showed that the ZrO2 monolith well-replicated a three-dimensional reticulated structure of pristine BC and possessed good morphology stability till 1100 °C in air. Results of N2 adsorption/desorption and mercury porosimetry analysis revealed the hierarchically porous structure and large specific area (9.7 m2·g-1) of the ZrO2 monolith, respectively. Patterns of X-ray powder diffraction indicated that the monoclinic phase and tetragonal phase coexisted in the ZrO2 monolith with the former as the main phase. In addition, the ZrO2 monolith possessed low bulk density (0.13 g·cm-3) and good mechanical strength. These properties suggest that the as-prepared ZrO2 monolith has a great potential to serve as an ideal catalyst or catalyst support.
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Affiliation(s)
- Bo-xing Zhang
- South
China Advanced Institute for Soft Matter Science and Technology (AISMST), South China University of Technology (SCUT), 381 Wushan Road, Tianhe District, Guangzhou 510640, China
| | - Yubei Zhang
- Laboratory
of Advanced Polymer Materials, Institute
of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing 100190, China
| | - Zhenhua Luo
- Laboratory
of Advanced Polymer Materials, Institute
of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing 100190, China
| | - Weijian Han
- Laboratory
of Advanced Polymer Materials, Institute
of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing 100190, China
| | - Wenfeng Qiu
- South
China Advanced Institute for Soft Matter Science and Technology (AISMST), South China University of Technology (SCUT), 381 Wushan Road, Tianhe District, Guangzhou 510640, China
| | - Tong Zhao
- Laboratory
of Advanced Polymer Materials, Institute
of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing 100190, China
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58
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Sriplai N, Mongkolthanaruk W, Eichhorn SJ, Pinitsoontorn S. Magnetically responsive and flexible bacterial cellulose membranes. Carbohydr Polym 2018; 192:251-262. [PMID: 29691019 DOI: 10.1016/j.carbpol.2018.03.072] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 03/19/2018] [Accepted: 03/21/2018] [Indexed: 12/11/2022]
Abstract
Magnetically responsive and flexible bacterial cellulose (BC) membranes were successfully fabricated using a simple diffusion of a ferrofluid solution. BC hydrogels were either water-substituted by alcohol (BC-N) or freeze dried (BC-F) prior to their immersion in the ferrofluid. The presence of both crystalline BC and Fe3O4 phases, and the homogeneous distribution of nanoparticles (NPs) in BC nanofibrils were observed. Higher concentrations of Fe3O4 NPs were found in the BC-N samples than for the BC-F samples. Higher magnetization in the BC-N samples was observed compared to the BC-F samples. Mechanical properties tests showed the higher strength and Young's modulus for the BC-F samples was possibly due to their more compacted nanostructure compared to BC-N. Using this simple process, the magnetic BC membranes show elastic properties upon deformation, returning to their original shape without damage. Also, they were highly sensitive to external magnetic forces giving them potential for many applications.
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Affiliation(s)
- Nipaporn Sriplai
- Materials Science and Nanotechnology Program, Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Wiyada Mongkolthanaruk
- Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Stephen J Eichhorn
- Bristol Composites Institute (ACCIS), University of Bristol, Queen's Building, University Walk, Bristol, BS8 1TR, UK
| | - Supree Pinitsoontorn
- Materials Science and Nanotechnology Program, Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand; Integrated Nanotechnology Research Center, Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
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59
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60
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Functionalized cellulose beads with three dimensional porous structure for rapid adsorption of active constituents from Pyrola incarnata. Carbohydr Polym 2018; 181:560-569. [DOI: 10.1016/j.carbpol.2017.11.111] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 11/30/2017] [Accepted: 11/30/2017] [Indexed: 11/22/2022]
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61
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Preparation and characterization of a photocatalytic antibacterial material: Graphene oxide/TiO2/bacterial cellulose nanocomposite. Carbohydr Polym 2017; 174:1078-1086. [DOI: 10.1016/j.carbpol.2017.07.042] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 07/06/2017] [Accepted: 07/14/2017] [Indexed: 11/22/2022]
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62
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Bagbi Y, Sarswat A, Mohan D, Pandey A, Solanki PR. Lead and Chromium Adsorption from Water using L-Cysteine Functionalized Magnetite (Fe 3O 4) Nanoparticles. Sci Rep 2017; 7:7672. [PMID: 28794435 PMCID: PMC5550514 DOI: 10.1038/s41598-017-03380-x] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 04/27/2017] [Indexed: 11/09/2022] Open
Abstract
L-Cysteine functionalized magnetite nanoparticles (L-Cyst-Fe3O4 NPs) were synthesized by chemical co-precipitation using Fe2+ and Fe3+ as iron precursors, sodium hydroxide as a base and L-Cysteine as functionalized agent. The structural and morphological studies were carried out using X-ray powder diffraction, transmission electron microscopy, dynamic light scattering, scanning electron microscopy and energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and UV-Vis spectrophotometric techniques. The zeta potential of bare Fe3O4 and functionalized L-Cyst-Fe3O4 NPs were +28 mV and -30.2 mV (pH 7.0), respectively. The positive surface charge changes to negative imply the presence of L-Cyst monolayer at particle interface. Band gap energy of 2.12 eV [bare Fe3O4NPs] and 1.4 eV [L-Cyst-Fe3O4 NPs] were obtained. Lead and chromium removal were investigated at different initial pHs, contact time, temperatures and adsorbate-adsorbent concentrations. Maximum Cr6+ and Pb2+ removal occurred at pH 2.0 and 6.0, respectively. Sorption dynamics data were best described by pseudo-second order rate equation. Pb2+ and Cr6+ sorption equilibrium data were best fitted to Langmuir equation. Langmuir adsorption capacities of 18.8 mg/g (Pb2+) and 34.5 mg/g (Cr6+) at 45 °C were obtained. Regeneration of exhausted L-Cyst-Fe3O4 NPs and recovery of Pb2+/Cr6+ were demonstrated using 0.01 M HNO3 and NaOH. L-Cyst-Fe3O4 NPs stability and reusability were also demonstrated.
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Affiliation(s)
- Yana Bagbi
- Special Centre for Nanoscience, Jawaharlal Nehru University, New Delhi, 110067, India
- Department of Physics, North Eastern Regional Institute of Science and Technology, Nirjuli, Arunachal Pradesh, 791109, India
| | - Ankur Sarswat
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Dinesh Mohan
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Arvind Pandey
- Department of Physics, North Eastern Regional Institute of Science and Technology, Nirjuli, Arunachal Pradesh, 791109, India
| | - Pratima R Solanki
- Special Centre for Nanoscience, Jawaharlal Nehru University, New Delhi, 110067, India.
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63
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Jain P, Varshney S, Srivastava S. Synthetically modified nano-cellulose for the removal of chromium: a green nanotech perspective. IET Nanobiotechnol 2017; 11:45-51. [PMID: 28476960 PMCID: PMC8676532 DOI: 10.1049/iet-nbt.2016.0036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 07/18/2016] [Accepted: 08/19/2016] [Indexed: 08/15/2023] Open
Abstract
Existing processes for the decontamination of heavy metals from water are found to be cost-prohibitive and energy-intensive which is totally against the sustainable concept of development. Green nanotechnology for water purification for ecosystem management, agricultural and industry is an emerging as leading global priority and occupies better position over the current state of water purification. Herein, the diafunctionalised polyaniline modified nanocellulose composite sorbent (PANI-NCC) has been used to introduce amine and imine functionalities for the removal of trivalent and hexavalent chromium from water bodies. The fabricated nanobiomaterial has been authenticated by modern spectroscopic, microscopic techniques. The modified PANI-NCC is rod-like in shape, ~60 nm in size. The roughness and crystallinity index is also quantified and found to be 49.67 nm and 84.18%, respectively. The optimised experimental finding provides the efficient removal of trivalent [Cr(III)] (47.06 mg/g; 94.12%) and hexavalent [Cr(VI)] (48.92 mg/g; 97.84%) chromium from synthetic waste water. The fabricated nano biosorbent is deemed to be a potent biosorbent for technological development to remove the toxic metals in the real environmental water samples.
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Affiliation(s)
- Priyanka Jain
- Department of Chemistry, Faculty of Science, Dayalbagh Educational Institute, Agra 282 005, India
| | - Shilpa Varshney
- Department of Chemistry, Faculty of Science, Dayalbagh Educational Institute, Agra 282 005, India
| | - Shalini Srivastava
- Department of Chemistry, Faculty of Science, Dayalbagh Educational Institute, Agra 282 005, India.
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64
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Das R, Vecitis CD, Schulze A, Cao B, Ismail AF, Lu X, Chen J, Ramakrishna S. Recent advances in nanomaterials for water protection and monitoring. Chem Soc Rev 2017; 46:6946-7020. [DOI: 10.1039/c6cs00921b] [Citation(s) in RCA: 353] [Impact Index Per Article: 50.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nanomaterials (NMs) for adsorption, catalysis, separation, and disinfection are scrutinized. NMs-based sensor technologies and environmental transformations of NMs are highlighted.
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Affiliation(s)
- Rasel Das
- Leibniz Institute of Surface Modification
- D-04318 Leipzig
- Germany
| | - Chad D. Vecitis
- School of Engineering and Applied Sciences
- Harvard University
- Cambridge
- USA
| | - Agnes Schulze
- Leibniz Institute of Surface Modification
- D-04318 Leipzig
- Germany
| | - Bin Cao
- School of Civil and Environmental Engineering
- Nanyang Technological University
- Singapore
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Centre
- Universiti Teknologi Malaysia
- 81310 Johor
- Malaysia
| | - Xianbo Lu
- CAS Key Laboratory of Separation Science for Analytical Chemistry
- Dalian Institute of Chemical Physics
- Dalian 116023
- China
| | - Jiping Chen
- CAS Key Laboratory of Separation Science for Analytical Chemistry
- Dalian Institute of Chemical Physics
- Dalian 116023
- China
| | - Seeram Ramakrishna
- Centre for Nanofibers and Nanotechnology
- Department of Mechanical Engineering
- National University of Singapore
- Singapore
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65
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Olivera S, Muralidhara HB, Venkatesh K, Guna VK, Gopalakrishna K, Kumar K. Y. Potential applications of cellulose and chitosan nanoparticles/composites in wastewater treatment: A review. Carbohydr Polym 2016; 153:600-618. [DOI: 10.1016/j.carbpol.2016.08.017] [Citation(s) in RCA: 196] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 07/14/2016] [Accepted: 08/05/2016] [Indexed: 10/21/2022]
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66
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Box-Behnken experimental design for chromium(VI) ions removal by bacterial cellulose-magnetite composites. Int J Biol Macromol 2016; 91:1062-72. [DOI: 10.1016/j.ijbiomac.2016.06.070] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Revised: 06/18/2016] [Accepted: 06/21/2016] [Indexed: 11/19/2022]
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67
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Li Y, Tian J, Tian H, Chen X, Ping W, Tian C, Lei H. Mutation-based selection and analysis of Komagataeibacter hansenii HDM1-3 for improvement in bacterial cellulose production. J Appl Microbiol 2016; 121:1323-1334. [PMID: 27455093 DOI: 10.1111/jam.13244] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 03/28/2016] [Accepted: 04/10/2016] [Indexed: 11/29/2022]
Abstract
AIMS A low yield of bacterial cellulose (BC) always results from an excessive accumulation of organic acids. Screening and the selection of bacterial mutants with a low accumulation of organic acids is an efficient approach for improving BC production. METHODS AND RESULTS In combination with the proton suicide method (medium containing NaBr-NaBrO3 ), diethyl sulphate chemical mutagenesis coupled with 60 Co-γ irradiation treatment were performed for the screening and selection of desired mutant lines with a high yield of BC. Two high-yield strains, Br-3 and Co-5, as well as a low-yield strain, Br-12, were obtained. Amplified fragment length polymorphism (AFLP) was applied to explore the differences between the mutant lines and the wild type. For the Br-12 line, three specific fragments were verified, corresponding to TonB-dependent transport (TBDT), exopolysaccharides output protein (PePr) and an unknown gene. For Co-5, two specific fragments were matched, acsD and UDP-galactose-4-epimerase. In addition, metabolic analysis for the mutant lines indicated that BC production may be limited by excessive accumulation of organic acids in the fermentation. The limitation would be resolved by the cross-talk of genes involved in BC biosynthesis. CONCLUSIONS Reduced organic acid by-products from glucose in bypasses were found to be responsible for the high-yield BC synthesis in Komagataeibacter hansenii mutant strains. SIGNIFICANCE AND IMPACT OF THE STUDY The metabolic process was varied by mutagenesis-induced gene disruption of the metabolic products. A new idea was provided for the targeted screening and characterization of mutants in the future.
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Affiliation(s)
- Y Li
- Laboratory of Microbiology and Laboratory of Crop Physiology, Chinese Academic Institute of Geography and Agroecology in Northeast, Changchun, China.,University of Chinese Academy of Sciences, Beijing, China
| | - J Tian
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, China
| | - H Tian
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, China
| | - X Chen
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, China
| | - W Ping
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, China.,Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, China
| | - C Tian
- Laboratory of Microbiology and Laboratory of Crop Physiology, Chinese Academic Institute of Geography and Agroecology in Northeast, Changchun, China.
| | - H Lei
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, China. .,Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, China.
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68
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Lofrano G, Carotenuto M, Libralato G, Domingos RF, Markus A, Dini L, Gautam RK, Baldantoni D, Rossi M, Sharma SK, Chattopadhyaya MC, Giugni M, Meric S. Polymer functionalized nanocomposites for metals removal from water and wastewater: An overview. WATER RESEARCH 2016; 92:22-37. [PMID: 26827255 DOI: 10.1016/j.watres.2016.01.033] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 01/04/2016] [Accepted: 01/15/2016] [Indexed: 06/05/2023]
Abstract
Pollution by metal and metalloid ions is one of the most widespread environmental concerns. They are non-biodegradable, and, generally, present high water solubility facilitating their environmental mobilisation interacting with abiotic and biotic components such as adsorption onto natural colloids or even accumulation by living organisms, thus, threatening human health and ecosystems. Therefore, there is a high demand for effective removal treatments of heavy metals, making the application of adsorption materials such as polymer-functionalized nanocomposites (PFNCs), increasingly attractive. PFNCs retain the inherent remarkable surface properties of nanoparticles, while the polymeric support materials provide high stability and processability. These nanoparticle-matrix materials are of great interest for metals and metalloids removal thanks to the functional groups of the polymeric matrixes that provide specific bindings to target pollutants. This review discusses PFNCs synthesis, characterization and performance in adsorption processes as well as the potential environmental risks and perspectives.
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Affiliation(s)
- Giusy Lofrano
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Salerno, Italy; Department of Environmental and Civil Engineering, University of Naples "Federico II", Via Claudio 21, 80127 Naples, Italy
| | - Maurizio Carotenuto
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Giovanni Libralato
- Department of Environmental Sciences, Informatics and Statistics, Cà Foscari University of Venice, Via Torino 155, 30172, Mestre-Venezia, Italy.
| | - Rute F Domingos
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université; Paris Diderot, UMR CNRS 7154, 75238 Paris Cedex 05, France
| | - Arjen Markus
- Deltares, PO Box 177, 2600 MH Delft, The Netherlands
| | - Luciana Dini
- Department of Biological and Environmental Science and Technology, University of Salento Prov.le Lecce-Monteroni, 73100 Lecce, Italy
| | - Ravindra Kumar Gautam
- Environmental Chemistry Research Laboratory, Department of Chemistry, University of Allahabad, Allahabad 211 002, India
| | - Daniela Baldantoni
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Marco Rossi
- Dipartimento di Scienze di Base e Applicate per l'Ingegneria, Via Antonio Scarpa 14/16, 00161 Roma, Italy
| | - Sanjay K Sharma
- Green Chemistry & Sustainability Research Group, Department of Chemistry, JECRC University, Jaipur 303905, India
| | - Mahesh Chandra Chattopadhyaya
- Environmental Chemistry Research Laboratory, Department of Chemistry, University of Allahabad, Allahabad 211 002, India
| | - Maurizio Giugni
- Department of Environmental and Civil Engineering, University of Naples "Federico II", Via Claudio 21, 80127 Naples, Italy
| | - Sureyya Meric
- Corlu Engineering Faculty, Environmental Engineering Department, Namık Kemal University, Corlu 59860, Tekirdag, Turkey
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69
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Rajput S, Pittman CU, Mohan D. Magnetic magnetite (Fe3O4) nanoparticle synthesis and applications for lead (Pb2+) and chromium (Cr6+) removal from water. J Colloid Interface Sci 2016; 468:334-346. [DOI: 10.1016/j.jcis.2015.12.008] [Citation(s) in RCA: 382] [Impact Index Per Article: 47.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 12/01/2015] [Accepted: 12/02/2015] [Indexed: 10/22/2022]
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70
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Yang XN, Xue DD, Li JY, Liu M, Jia SR, Chu LQ, Wahid F, Zhang YM, Zhong C. Improvement of antimicrobial activity of graphene oxide/bacterial cellulose nanocomposites through the electrostatic modification. Carbohydr Polym 2016; 136:1152-60. [DOI: 10.1016/j.carbpol.2015.10.020] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 09/21/2015] [Accepted: 10/07/2015] [Indexed: 01/18/2023]
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71
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Liu S, Yao K, Fu LH, Ma MG. Selective synthesis of Fe3O4, γ-Fe2O3, and α-Fe2O3 using cellulose-based composites as precursors. RSC Adv 2016. [DOI: 10.1039/c5ra22985e] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Iron oxide with various phases such as Fe3O4, γ-Fe2O3, and α-Fe2O3 has been selective successfully synthesized using cellulose-based composites as precursors, which were obtained at 180 °C for 45 min by the microwave-hydrothermal method.
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Affiliation(s)
- Shan Liu
- Beijing Key Laboratory of Lignocellulosic Chemistry
- College of Materials Science and Technology
- Beijing Forestry University
- Beijing 100083
- PR China
| | - Ke Yao
- Beijing Key Laboratory of Lignocellulosic Chemistry
- College of Materials Science and Technology
- Beijing Forestry University
- Beijing 100083
- PR China
| | - Lian-Hua Fu
- Beijing Key Laboratory of Lignocellulosic Chemistry
- College of Materials Science and Technology
- Beijing Forestry University
- Beijing 100083
- PR China
| | - Ming-Guo Ma
- Beijing Key Laboratory of Lignocellulosic Chemistry
- College of Materials Science and Technology
- Beijing Forestry University
- Beijing 100083
- PR China
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72
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Ren C, Ding X, Fu H, Meng C, Li W, Yang H. Preparation of amino-functionalized CoFe2O4@SiO2 magnetic nanocomposites for potential application in absorbing heavy metal ions. RSC Adv 2016. [DOI: 10.1039/c6ra13304e] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The magnetic CoFe2O4@SiO2–NH2 particles with core-shell structure are designed and synthesized. They have high adsorption capacity (170.829 mg g−1), high removal efficiency (96.93%) for heavy metals, and can be recycled easily.
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Affiliation(s)
- Chunrong Ren
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Xingeng Ding
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
- Zhejiang California International Nano Systems Institute
| | - Huiqin Fu
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Cheng Meng
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Wenqi Li
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Hui Yang
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
- Zhejiang California International Nano Systems Institute
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73
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Sulaeva I, Henniges U, Rosenau T, Potthast A. Bacterial cellulose as a material for wound treatment: Properties and modifications. A review. Biotechnol Adv 2015; 33:1547-71. [DOI: 10.1016/j.biotechadv.2015.07.009] [Citation(s) in RCA: 209] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 07/02/2015] [Accepted: 07/29/2015] [Indexed: 12/19/2022]
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74
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Liu M, Zhong C, Wu XY, Wei YQ, Bo T, Han PP, Jia SR. Metabolomic profiling coupled with metabolic network reveals differences in Gluconacetobacter xylinus from static and agitated cultures. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2015.05.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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75
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Carpenter AW, de Lannoy CF, Wiesner MR. Cellulose nanomaterials in water treatment technologies. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:5277-87. [PMID: 25837659 PMCID: PMC4544834 DOI: 10.1021/es506351r] [Citation(s) in RCA: 274] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Cellulose nanomaterials are naturally occurring with unique structural, mechanical and optical properties. While the paper and packaging, automotive, personal care, construction, and textiles industries have recognized cellulose nanomaterials' potential, we suggest cellulose nanomaterials have great untapped potential in water treatment technologies. In this review, we gather evidence of cellulose nanomaterials' beneficial role in environmental remediation and membranes for water filtration, including their high surface area-to-volume ratio, low environmental impact, high strength, functionalizability, and sustainability. We make direct comparison between cellulose nanomaterials and carbon nanotubes (CNTs) in terms of physical and chemical properties, production costs, use and disposal in order to show the potential of cellulose nanomaterials as a sustainable replacement for CNTs in water treatment technologies. Finally, we comment on the need for improved communication and collaboration across the myriad industries invested in cellulose nanomaterials production and development to achieve an efficient means to commercialization.
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Affiliation(s)
- Alexis Wells Carpenter
- Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina 27708, United States
- Center for the Environmental Implications of NanoTechnology, Duke University, Durham, North Carolina 27708, United States
| | - Charles François de Lannoy
- Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina 27708, United States
- Center for the Environmental Implications of NanoTechnology, Duke University, Durham, North Carolina 27708, United States
| | - Mark R. Wiesner
- Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina 27708, United States
- Center for the Environmental Implications of NanoTechnology, Duke University, Durham, North Carolina 27708, United States
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76
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Wang J, Lu X, Ng PF, Lee KI, Fei B, Xin JH, Wu JY. Polyethylenimine coated bacterial cellulose nanofiber membrane and application as adsorbent and catalyst. J Colloid Interface Sci 2015; 440:32-8. [DOI: 10.1016/j.jcis.2014.10.035] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 10/18/2014] [Indexed: 11/24/2022]
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77
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Zhang X, Wang Y, Yang S. Simultaneous removal of Co(II) and 1-naphthol by core–shell structured Fe3O4@cyclodextrin magnetic nanoparticles. Carbohydr Polym 2014; 114:521-529. [DOI: 10.1016/j.carbpol.2014.08.072] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 07/19/2014] [Accepted: 08/13/2014] [Indexed: 11/27/2022]
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78
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Bi JC, Liu SX, Li CF, Li J, Liu LX, Deng J, Yang YC. Morphology and structure characterization of bacterial celluloses produced by different strains in agitated culture. J Appl Microbiol 2014; 117:1305-11. [DOI: 10.1111/jam.12619] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 07/31/2014] [Accepted: 08/03/2014] [Indexed: 11/29/2022]
Affiliation(s)
- J.-C. Bi
- College of Food Science and Technology; Hainan University; Haikou China
| | - S.-X. Liu
- College of Food Science and Technology; Hainan University; Haikou China
| | - C.-F. Li
- College of Food Science and Technology; Hainan University; Haikou China
| | - J. Li
- College of Food Science and Technology; Hainan University; Haikou China
| | - L.-X. Liu
- College of Food Science and Technology; Hainan University; Haikou China
| | - J. Deng
- College of Food Science and Technology; Hainan University; Haikou China
| | - Y.-C. Yang
- College of Food Science and Technology; Hainan University; Haikou China
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79
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Masoumi A, Ghaemy M. Removal of metal ions from water using nanohydrogel tragacanth gum-g-polyamidoxime: isotherm and kinetic study. Carbohydr Polym 2014; 108:206-15. [PMID: 24751266 DOI: 10.1016/j.carbpol.2014.02.083] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Revised: 02/18/2014] [Accepted: 02/24/2014] [Indexed: 10/25/2022]
Abstract
A new biosorbent was prepared by grafting polyacrylonitrile onto iranian tragacanth gum (ITG), a naturally and abundantly available polysaccharide, and subsequent amidoximation in the presence of hydroxylamine hydrochloride. This nanohydrogel with amidoxime functional groups [C(NH2)NOH], named polyamidoxime-g-tragacanth (ITG-g-PAO), was characterized and used for the removal of metal ions from aqueous solution. The effect of pH, agitation time, concentration of adsorbate and amount of adsorbent on the extent of adsorption was investigated. The experimental data were analyzed by four isotherms and kinetics equations, and the results were fitted well with the Temkin isotherm and pseudo-second-order model. The maximum adsorption capacities (Qm) of ITG-g-PAO as obtained from Langmuir adsorption isotherm were found to be 100.0, 76.92, 71.42 and 66.67 (mgg(-1)) for the adsorption of metal ions in order of Co(II)>Zn(II)>Cr(III)>Cd(II). The experimental results demonstrate that the above selective order of adsorption capacity is due to formation of stable chelating ring between the bidentate amidoxime ligand and metal ion.
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Affiliation(s)
- Arameh Masoumi
- Polymer Research Laboratory, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
| | - Mousa Ghaemy
- Polymer Research Laboratory, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran.
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80
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81
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Marins JA, Soares BG, Barud HS, Ribeiro SJ. Flexible magnetic membranes based on bacterial cellulose and its evaluation as electromagnetic interference shielding material. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:3994-4001. [DOI: 10.1016/j.msec.2013.05.035] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 04/29/2013] [Accepted: 05/16/2013] [Indexed: 11/29/2022]
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82
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Dong C, Zhang H, Pang Z, Liu Y, Zhang F. Sulfonated modification of cotton linter and its application as adsorbent for high-efficiency removal of lead(II) in effluent. BIORESOURCE TECHNOLOGY 2013; 146:512-518. [PMID: 23973968 DOI: 10.1016/j.biortech.2013.07.108] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/21/2013] [Accepted: 07/24/2013] [Indexed: 06/02/2023]
Abstract
Sulfonated modification of cotton linter and its novel application as adsorbent for Pb(2+) in effluent were investigated. Results show that sulfonated cotton linter (SCL) has strong adsorbability for Pb(2+), more than 85% of Pb(2+) can be removed at lower Pb(2+) concentration (<20 mg/L). Its adsorbability for Pb(2+) is related to effluent pH, temperature, and initial Pb(2+) concentration. The adsorption process can reach equilibrium within 8 min, which can be described through the pseudo-second-order kinetic model. The adsorption isotherm is closely fitted with the Temkin isotherm model, which suggests that the adsorption of Pb(2+) on SCL can be regarded as chemical adsorption. The adsorption process of Pb(2+) on SCL is non-spontaneous and endothermic, based on the value of Gibbs free energy and enthalpy. Compared with commercial activated carbon, SCL is simple to prepare and does not require any special technology.
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Affiliation(s)
- Cuihua Dong
- Key Laboratory of Pulp & Paper Science and Technology, Shandong Polytechnic University, Jinan 250353, China; Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China.
| | - Haiguang Zhang
- Key Laboratory of Pulp & Paper Science and Technology, Shandong Polytechnic University, Jinan 250353, China
| | - Zhiqiang Pang
- Key Laboratory of Pulp & Paper Science and Technology, Shandong Polytechnic University, Jinan 250353, China
| | - Yu Liu
- Key Laboratory of Pulp & Paper Science and Technology, Shandong Polytechnic University, Jinan 250353, China
| | - Fulong Zhang
- Key Laboratory of Pulp & Paper Science and Technology, Shandong Polytechnic University, Jinan 250353, China
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83
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Zhong C, Zhang GC, Liu M, Zheng XT, Han PP, Jia SR. Metabolic flux analysis of Gluconacetobacter xylinus for bacterial cellulose production. Appl Microbiol Biotechnol 2013; 97:6189-99. [PMID: 23640364 DOI: 10.1007/s00253-013-4908-8] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 03/21/2013] [Accepted: 04/07/2013] [Indexed: 10/26/2022]
Abstract
Metabolic flux analysis was used to reveal the metabolic distributions in Gluconacetobacter xylinus (CGMCC no. 2955) cultured on different carbon sources. Compared with other sources, glucose, fructose, and glycerol could achieve much higher bacterial cellulose (BC) yields from G. xylinus (CGMCC no. 2955). The glycerol led to the highest BC production with a metabolic yield of 14.7 g/mol C, which was approximately 1.69-fold and 2.38-fold greater than that produced using fructose and glucose medium, respectively. The highest BC productivity from G. xylinus CGMCC 2955 was 5.97 g BC/L (dry weight) when using glycerol as the sole carbon source. Metabolic flux analysis for the central carbon metabolism revealed that about 47.96 % of glycerol was transformed into BC, while only 19.05 % of glucose and 24.78 % of fructose were transformed into BC. Instead, when glucose was used as the sole carbon source, 40.03 % of glucose was turned into the by-product gluconic acid. Compared with BC from glucose and fructose, BC from the glycerol medium showed the highest tensile strength at 83.5 MPa, with thinner fibers and lower porosity. As a main byproduct of biodiesel production, glycerol holds great potential to produce BC with superior mechanical and microstructural characteristics.
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Affiliation(s)
- Cheng Zhong
- Key Laboratory of Industrial Fermentation Microbiology-Ministry of Education, Tianjin University of Science and Technology, Tianjin 300457, People's Republic of China
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84
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Tang Y, Liang S, Wang J, Yu S, Wang Y. Amino-functionalized core-shell magnetic mesoporous composite microspheres for Pb(II) and Cd(II) removal. J Environ Sci (China) 2013; 25:830-837. [PMID: 23923794 DOI: 10.1016/s1001-0742(12)60141-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Amino-functionalized Fe3O4@mesoporous SiO2 core-shell composite microspheres NH2-MS in created in multiple synthesis steps have been investigated for Pb(II) and Cd(II) adsorption. The microspheres were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), N2 adsorption-desorption, zeta potential measurements and vibrating sample magnetometer. Batch adsorption tests indicated that NH2-MS exhibited higher adsorption affinity toward Pb(II) and Cd(II) than MS did. The Langmuir model could fit the adsorption isotherm very well with maximum adsorption capacity of 128.21 and 51.81 mg/g for Pb(II) and Cd(II), respectively, implying that adsorption processes involved monolayer adsorption. Pb(II) and Cd(II) adsorption could be well described by the pseudo second-order kinetics model, and was found to be strongly dependent on pH and humic acid. The Pb(II)- and Cd(II)-loaded microspheres were effectively desorbed using 0.01 mol/L HCl or EDTA solution. NH2-MS have promise for use as adsorbents in the removal of Pb(II) and Cd(II) in wastewater treatment processes.
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Affiliation(s)
- Yulin Tang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, China.
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85
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Badruddoza AZM, Shawon ZBZ, Tay WJD, Hidajat K, Uddin MS. Fe3O4/cyclodextrin polymer nanocomposites for selective heavy metals removal from industrial wastewater. Carbohydr Polym 2012; 91:322-32. [PMID: 23044139 DOI: 10.1016/j.carbpol.2012.08.030] [Citation(s) in RCA: 286] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Revised: 08/02/2012] [Accepted: 08/08/2012] [Indexed: 11/26/2022]
Abstract
In this work, carboxymethyl-β-cyclodextrin (CM-β-CD) polymer modified Fe(3)O(4) nanoparticles (CDpoly-MNPs) was synthesized for selective removal of Pb(2+), Cd(2+), Ni(2+) ions from water. This magnetic adsorbent was characterized by TEM, FTIR, XPS and VSM. The adsorption of all studied metal ions onto CDpoly-MNPs was found to be dependent on pH, ionic strength, and temperature. Batch adsorption equilibrium was reached in 45 min and maximum uptakes for Pb(2+), Cd(2+) and Ni(2+) in non-competitive adsorption mode were 64.5, 27.7 and 13.2 mg g(-1), respectively at 25 °C. Adsorption data were fitted well to Langmuir isotherm and pseudo-second-order models for kinetic study. The polymer grafted on MNPs enhanced the adsorption capacity because of the complexing abilities of the multiple hydroxyl and carboxyl groups in polymer backbone with metal ions. In competitive adsorption experiments, CDpoly-MNPs could preferentially adsorb Pb(2+) ions with an affinity order of Pb(2+)>>Cd(2+)>Ni(2+) which can be explained by hard and soft acids and bases (HASB) theory. Furthermore, we explored the recyclability of CDpoly-MNPs.
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Affiliation(s)
- Abu Zayed M Badruddoza
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singapore.
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