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Wang Q, Wang JL, Yu YT, Xu H, Bai X, Zeng YY, Kan ZY, Xu Y. Self-Assembly of Lanthanide-Aluminum Cluster-Organic Frameworks with Magnetocaloric Effect and Luminescence. Inorg Chem 2024; 63:613-620. [PMID: 38102774 DOI: 10.1021/acs.inorgchem.3c03504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
The self-assembly of the lanthanide metal-organic frameworks presents a formidable challenge but profound significance. Compared with the metal-organic frameworks based on 4f-3d ions, the chemistry of 4f-3p metal-organic frameworks has not been fully explored so far. In this study, two lanthanide-aluminum-based clusters [Ln6Al(IN)10(μ3-OH)5(μ3-O)3(H2O)8]·xH2O (x = 2, Ln = Gd, abbreviated as Gd6Al; x = 2.5, Ln = Eu, abbreviated as Eu6Al; HIN = isonicotinic acid) have been meticulously designed and obtained by hydrothermal reaction at low pH. The crystallographic study revealed that both Gd6Al and Eu6Al clusters exhibit an unprecedented sandwiched metal-organic framework holding a highly ordered honeycomb network. To our knowledge, it is the first case of Ln-Al-based cluster-organic frameworks. Furthermore, magnetic investigation of Gd6Al manifests a decent magnetic entropy change of -ΔSmmax = 28.8 J kg-1 K-1 at 2 K for ΔH = 7.0 T. Significantly, the introduction of AlIII ions into the lanthanide metal-organic frameworks displays excellent solid-state luminescent capability with a lifetime of 371.6 μs and quantum yield of 6.64%. The construction and investigation of these two Ln-Al clusters represent great progress in the 4f-3p metal-organic framework.
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Affiliation(s)
- Qin Wang
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
| | - Ji-Lei Wang
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
| | - Ya-Ting Yu
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
| | - Hu Xu
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
| | - Xu Bai
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
| | - Ying-Ying Zeng
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
| | - Zhi-Yuan Kan
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
| | - Yan Xu
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
- Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, P. R. China
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2
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Chitosan-cellulose nanocomposite: Preparation, characterization, and evaluation as cationic color precipitant in sugar clarification process. Food Chem 2023; 415:135603. [PMID: 36870210 DOI: 10.1016/j.foodchem.2023.135603] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 01/05/2023] [Accepted: 01/28/2023] [Indexed: 02/01/2023]
Abstract
The present paper aims to use natural biodegradable polymers of chitosan (CS) and cellulose (CEL) to synthesize green chitosan-cellulose (CS-CEL) nanocomposite as a new clarifying agent. This is the cutting-edge of the sugar industry's clarification process. The CS-CEL nanocomposite showed outstanding results in zeta potential analysis, with a maximum value (+) 57.73 mV, leading to remarkableresults in coloradsorption via electrostatic attraction. It was also observed that CS-CEL has high mechanical stability. When CS and CS-CEL nanocomposite were used in the clarification of sugarcane (MJ), the findings demonstrated an improvement in colorremoval of up to 8.7% using CS and 18.1%using CS-CEL nanocomposite compared to currently phosphotation clarification process. Also, Turbidity decreased using CS-CEL nanocomposite compared to the traditional phosphotation clarification process. Overall, we can conclude that CS-CEL nanocomposite has considerable efficiency in sugarcane juice clarification process as a green biodegradable adsorbent and flocculating material to produce sulfur-free sugar.
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Giannuzzi L, Bacciadone J, Salerno GL. A Promising Use of Trimethyl Chitosan for Removing Microcystis aeruginosa in Water Treatment Processes. Microorganisms 2022; 10:microorganisms10102052. [PMID: 36296328 PMCID: PMC9610100 DOI: 10.3390/microorganisms10102052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/12/2022] [Accepted: 10/12/2022] [Indexed: 11/16/2022] Open
Abstract
The increase in cyanobacterial blooms linked to climate change and the eutrophication of water bodies is a global concern. The harmful cyanobacterium Microcystis aeruginosa is one of the most common bloom-forming species whose removal from fresh water and, in particular, from that used for water treatment processes, remains a crucial goal. Different biodegradable and environmentally friendly coagulants/flocculants have been assayed, with chitosan showing a very good performance. However, chitosan in its original form is of limited applicability since it is only soluble in acid solution. The objective of this work was therefore to test the coagulant/flocculant capacity of trimethylchitosan (TMC), a chitosan derivative produced from residues of the fishing industry. TMC has a constitutively net positive charge enabling it to remain in solution regardless of the pH. Results show that even at alkaline pHs, common during cyanobacterial blooms, TMC is effective in removing buoyant cyanobacteria from the water column, both in test tube and Jar-Test experiments. Cell integrity was confirmed by fluorescent stain and electron microscopy. Our findings lead us to conclude that the use of TMC to remove bloom cells early in the treatment of drinking water is both feasible and promising.
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Affiliation(s)
- Leda Giannuzzi
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA-CONICET), La Plata 1900, Argentina
- Correspondence:
| | - Julián Bacciadone
- Fundación Para Investigaciones Biológicas Aplicadas (FIBA), Vieytes 3103, Mar del Plata 7600, Argentina
| | - Graciela L. Salerno
- Fundación Para Investigaciones Biológicas Aplicadas (FIBA), Vieytes 3103, Mar del Plata 7600, Argentina
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Facile preparation of iron oxyhydroxide–biopolymer (Chitosan/Alginate) beads and their comparative insights into arsenic removal. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118983] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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5
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Khairul Zaman N, Rohani R, Izni Yusoff I, Kamsol MA, Basiron SA, Abd. Rashid AI. Eco-Friendly Coagulant versus Industrially Used Coagulants: Identification of Their Coagulation Performance, Mechanism and Optimization in Water Treatment Process. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:9164. [PMID: 34501755 PMCID: PMC8430898 DOI: 10.3390/ijerph18179164] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/21/2021] [Accepted: 08/23/2021] [Indexed: 02/02/2023]
Abstract
The evaluation of complex organic and inorganic coagulant's performances and their relationships could compromise the surface water treatment process time and its efficiency. In this work, process optimization was investigated by comparing an eco-friendly chitosan with the industrially used coagulants namely aluminum sulfate (alum), polyaluminum chloride (PAC), and aluminum chlorohydrate (ACH) in compliance with national drinking water standards. To treat various water samples from different treatment plants with turbidity and pH ranges from 20-826.3 NTU and 5.21-6.80, respectively, 5-20 mg/L coagulant dosages were varied in the presence of aluminum, ferum, and manganese. Among all, 10 mg/L of the respective ACH and chitosan demonstrated 97% and 99% turbidity removal in addition to the removal of the metals that complies with the referred standard. However, chitosan owes fewer sensitive responses (turbidity and residual metal) with the change in its input factors (dosage and pH), especially in acidic conditions. This finding suggested its beneficial role to be used under the non-critical dosage monitoring. Meanwhile, ACH was found to perform better than chitosan only at pH > 7.4 with half dosage required. In summary, chitosan and ACH could perform equally at a different set of optimum conditions. This optimization study offers precise selections of coagulants for a practical water treatment operation.
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Affiliation(s)
- Nadiah Khairul Zaman
- Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia; (N.K.Z.); (I.I.Y.); (M.A.K.); (S.A.B.)
| | - Rosiah Rohani
- Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia; (N.K.Z.); (I.I.Y.); (M.A.K.); (S.A.B.)
- Research Centre for Sustainable Process Technology, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia
| | - Izzati Izni Yusoff
- Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia; (N.K.Z.); (I.I.Y.); (M.A.K.); (S.A.B.)
| | - Muhammad Azraei Kamsol
- Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia; (N.K.Z.); (I.I.Y.); (M.A.K.); (S.A.B.)
| | - Siti Aishah Basiron
- Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia; (N.K.Z.); (I.I.Y.); (M.A.K.); (S.A.B.)
- Makmal Pusat, Syarikat Air Melaka Berhad, Jalan Padang Keladi, Durian Tunggal, Melaka 76100, Malaysia
| | - Aina Izzati Abd. Rashid
- Department of Civil Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia;
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Aboelfetoh EF, Aboubaraka AE, Ebeid EZM. Binary coagulation system (graphene oxide/chitosan) for polluted surface water treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 288:112481. [PMID: 33827021 DOI: 10.1016/j.jenvman.2021.112481] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 02/15/2021] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
In this study, chitosan (CS) is used as a natural coagulant aid alongside graphene oxide (GO) to remove turbidity and numerous pollutants from raw and artificially contaminated surface water. The coagulation capability of the system (GO/CS) was assessed with respect to a water sample's turbidity, pH, coagulant dose, settling velocity, and temperature. The presence of CS enhanced the coagulation capacity of GO at varied pH levels and no GO residue was detected in the water after the treatment. The proposed system achieved high turbidity removal efficiency (≥98.3%) for all turbidity levels. A mixture of GO (8 mg/L) and CS (2 mg/L) was ideal to remove algae (99.5%) and bacteria (≥95.0%). Furthermore, it demonstrated a high coagulation capacity to remove dyes, direct brown-2 (DB-2), methylene blue (MB), and Pb(II) ions from artificially contaminated surface water. Interestingly, the sludge exhibited an extraordinary adsorption capacity for DB-2, MB, and Pb(II) ions. The adsorption process followed the pseudo-second-order kinetic model, and was consistent with the Langmuir model, with an adsorption capacity of up to 667.8, 400.7, and 459.1 mg/g for DB-2, MB, and Pb(II) ions, respectively. Therefore, the presented binary coagulation system is of great potential economic value for the treatment of raw surface water and wastewater.
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Affiliation(s)
- Eman F Aboelfetoh
- Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt.
| | - Abdelmeguid E Aboubaraka
- Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt; Central Lab of El-Gharbia Water and Wastewater Company, Tanta, Egypt
| | - El-Zeiny M Ebeid
- Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt; Misr University for Science and Technology (MUST), 6th of October City, Egypt
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7
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Zhang XZ, Wang XF, Fang WH, Zhang J. Synthesis, Structures, and Fluorescence Properties of Dimeric Aluminum Oxo Clusters. Inorg Chem 2021; 60:7089-7093. [PMID: 33926193 DOI: 10.1021/acs.inorgchem.0c03816] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aluminum is an important component for luminescence. However, the fluorescent aluminum complex with unambiguous structural information is still limited. Herein, we report a series of fluorescence aluminum oxo clusters (AlOCs). By introducing an additional coordination site to the aromatic conjugation ligand, cluster nuclearity increment and fluorescence variation are observed. Al8(OH)2(μ4-O)2(1-NA)2(OEt)16 (AlOC-41, 1-NA = 1-naphthoic acid, OEt = ethanol) is made up of two tetrahedral subunits. By introducing an additional coordination site to the aromatic conjugation ligand, we isolate a high nuclearity compound Al10(μ3-O)2(3-HNA)2(OEt)22 (AlOC-47, 3-HNA = 3-hydroxy-2-naphthoic acid). Correspondingly, their luminescence performance is different (blue fluorescence in AlOC-41 and green in AlOC-47). Present herein is a platform to illustrate the relationship between synthesis, structure, and fluorescence properties.
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Affiliation(s)
- Xue-Zhen Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Xiao-Feng Wang
- School of Chemistry and Chemical Engineering, University of South China, No. 28, Changsheng Xi Road, Hengyang 421001, Hunan, China
| | - Wei-Hui Fang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Jian Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
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8
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Initialization, enhancement and mechanisms of aerobic granulation in wastewater treatment. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118220] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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9
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Nakazawa Y, Abe T, Matsui Y, Shirasaki N, Matsushita T. Stray particles as the source of residuals in sand filtrate: Behavior of superfine powdered activated carbon particles in water treatment processes. WATER RESEARCH 2021; 190:116786. [PMID: 33387954 DOI: 10.1016/j.watres.2020.116786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 06/12/2023]
Abstract
Although superfine powdered activated carbon has excellent adsorption properties, it is not used in conventional water treatment processes comprising coagulation-flocculation, sedimentation, and sand filtration (CSF) due to concerns about its residual in treated water. Here, we examined the production and fate of very fine carbon particles with lacking in charge neutralization as a source of the residual in sand filtrate after CSF treatment. Almost all of the carbon particles in the water were charge-neutralized by coagulation treatment with rapid mixing, but a very small amount (≤0.4% of the initial concentration) of very fine carbon particles with a lesser degree of charge neutralization were left behind in coagulation process. Such carbon particles, defined as stray carbon particles, were hardly removed by subsequent flocculation and sedimentation processes, and some of them remained in the sand filtrate. The concentration of residual carbon particles in the sand filtrate varied similarly with that of the stray carbon particles. The stray and residual carbon particles were similarly smaller than the particles before coagulation treatment, but the residual carbon particles had less charge neutralization than the stray carbon particles. The turbidity of water samples collected after sedimentation was not correlated with the residual carbon concentration in the sand filtrate, even though it is often used as an indicator of treatment performance with respect to the removal of suspended matter. Based on these findings, we suggest that reduction of the amount of stray particles should be a performance goal of the CSF treatment. Examining this concept further, we confirmed that the residence time distributions in the coagulation and flocculation reactors influenced the concentration of stray carbon particles and then the residual carbon particle concentration in sand filtrate, but found that the effect was dependent on coagulant type. A multi-chambered-reactor configuration lowered both the stray carbon particle concentration after coagulation treatment and the residual carbon particle concentration in sand filtrate compared with a single-chambered reactor configuration. When a normal basicity PACl that consisted mainly of monomeric Al species was used, the stray carbon particle concentration was decreased during coagulation process and then gradually decreased during subsequent flocculation process because the monomeric Al species were transformed to colloidal Al species via polymeric Al species. In contrast, when a high-basicity PACl that consisted mostly of colloidal Al species was used, coagulation treatment largely decreased the stray carbon particle concentration, which did not decrease further during subsequent flocculation process. These findings will be valuable for controlling residual carbon particles after the CSF treatment.
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Affiliation(s)
- Yoshifumi Nakazawa
- Graduate School of Engineering, Hokkaido University, N13W8, Sapporo 060-8628, Japan
| | - Taketo Abe
- Graduate School of Engineering, Hokkaido University, N13W8, Sapporo 060-8628, Japan
| | - Yoshihiko Matsui
- Faculty of Engineering, Hokkaido University, N13W8, Sapporo 060-8628, Japan.
| | - Nobutaka Shirasaki
- Faculty of Engineering, Hokkaido University, N13W8, Sapporo 060-8628, Japan
| | - Taku Matsushita
- Faculty of Engineering, Hokkaido University, N13W8, Sapporo 060-8628, Japan
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Wang ST, Zhang SH, Fang WH, Zhang J. Stepwise Coordination Assembly Approach toward Aluminum-Lanthanide-based Compounds. Inorg Chem 2020; 59:13760-13766. [DOI: 10.1021/acs.inorgchem.0c02119] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- San-Tai Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- College of Chemistry, Guilin University of Technology, Guilin, Guangxi 541004, China
| | - Shu-Hua Zhang
- College of Chemistry, Guilin University of Technology, Guilin, Guangxi 541004, China
| | - Wei-Hui Fang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Jian Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
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11
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Shi Y, Xing Y, Deng S, Zhao B, Fu Y, Liu Z. Synthesis of proanthocyanidins-functionalized Fe3O4 magnetic nanoparticles with high solubility for removal of heavy-metal ions. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137600] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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12
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Synthesis of the Hydrophobic Cationic Polyacrylamide (PADD) Initiated by Ultrasonic and its Flocculation and Treatment of Coal Mine Wastewater. Processes (Basel) 2020. [DOI: 10.3390/pr8010062] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, a new type of hydrophobic cationic polyacrylamide P (AM-DMC-DABC) (PADD) was synthesized by ultrasonic (US)-initiated polymerization, which is used for the separation and removal of coal mine wastewater. The acrylamide (AM), methacryloyloxyethyl trimethyl ammonium chloride (DMC) and acryloyloxyethyl dimethylbenzyl ammonium chloride (DABC) were used as monomers to prepare). The factors that affecting the US initiated polymerization of PADD were analyzed. Fourier transform infrared spectroscopy (FT-IR), 1H nuclear magnetic resonance (1H NMR) and scanning electron microscopy (SEM) were used to characterize the chemical structure, thermal decomposition performance and surface morphology of the polymers. FT-IR and 1H NMR results showed that PADD was successfully synthesized. In addition, irregular porous surface morphology of PADD were observed by SEM analysis. Under the optimum conditions (pH = 7.0, flocculant dosage = 16.0 mg/L), the excellent flocculation performance (turbidity removal rate (TR) = 98.8%), floc size d50 = 513.467 μm, fractal dimension (Df) = 1.61, flocculation kinetics (KN0) = 27.24 × 10−3·s−1) was obtained by using high-efficiency flocculant PADD. Zeta potential analysis was used to further explore the possible flocculation mechanism of removal. The zeta potential and flocculation analytical results displayed that the flocculation removal process of coal mine wastewater mainly included hydrophobic effect, adsorption, bridging and charge neutralization, and electric patching when PADD was used. The PADD showed more excellent coal mine wastewater flocculation performance than PAD, commercial cationic polyacrylamide (CPAM) CCPAM and PAM. Thus PADD, with its good flocculation effect on coal mine wastewater under relatively wide pH range, had bright practical application value.
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Liu S, Hu Y, Xia J, Fang S, Duan M. In Situ Measurement of Depletion Caused by SDBS Micelles on the Surface of Silica Particles Using Optical Tweezers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:13536-13542. [PMID: 31574218 DOI: 10.1021/acs.langmuir.9b02041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Dual-trap optical tweezers have been used to directly measure the interaction forces between two silica particles upon controlling the concentration of the ionic surfactant sodium dodecylbenzenesulfonate (SDBS). By capturing two silica particles in one spot optical trap and one linear optical trap and controlling the linear trap to bring one particle to approach another sufficiently closer, the interaction forces between these two particles can be measured as the separation distance changes. Results showed that with increasing concentrations of SDBS, the interaction force between the two silica particles emerges at closer surface distance between two silica particles. Only repulsive force exists between silica particles below the critical micelle concentration (cmc) of SDBS and it could be well-fitted using the classical Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. However, the depletion attraction force appears above the cmc of SDBS which is induced by the generation of SDBS micelles. By in situ measurement of the interaction force between two silica particles in the presence of different concentrations of SDBS, the depletion force can be quantitatively calculated.
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Affiliation(s)
- Shuai Liu
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu , Sichuan 610500 , P. R. China
| | - Yue Hu
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu , Sichuan 610500 , P. R. China
| | - Jing Xia
- School of Engineering and Applied Sciences , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Shenwen Fang
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu , Sichuan 610500 , P. R. China
| | - Ming Duan
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu , Sichuan 610500 , P. R. China
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14
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Kassem A, Ayoub GM, Malaeb L. Antibacterial activity of chitosan nano-composites and carbon nanotubes: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 668:566-576. [PMID: 30856567 DOI: 10.1016/j.scitotenv.2019.02.446] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/27/2019] [Accepted: 02/27/2019] [Indexed: 06/09/2023]
Abstract
Bacteriological contamination of water sources is a major challenge that has a detrimental impact on both the environment and human health. This imposes the search for the most efficient disinfectant. Despite their antibacterial efficiency, traditional methods can often form disinfection byproducts through their reaction with organic and inorganic compounds. Substitutes for conventional bacterial inactivation methods should not produce harmful byproducts and must also be cost effective. Nanotechnology is an attractive option that is suited for surface reactions as nanostructures offer large surface to volume ratios. Technologies using chitosan-modified nanocomposites and carbon nanotubes have proven to offer promising alternatives for bacterial inactivation. To enhance their antibacterial efficiency, such technologies have been modified chemically and physically and have as well been associated with other treatment techniques. However, despite their high bacterial disinfection efficacy and lack of treatment byproducts, the vagueness in bacterial inactivation mechanisms and complexity in materials preparation have often obscured their wide scale application. The aim of this manuscript is to review the recent advances in bacterial disinfection using nanomaterials, in the form of chitosan and carbon nanotubes. The rapid rate of research and the notable progress in this area dictate the frequent compilation and dissemination of recent introductions to this field. Existing gaps in the literature are thus also highlighted and reported discrepancies are pinpointed so that roadmaps for future studies may be figured.
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Affiliation(s)
- Assaad Kassem
- Civil and Environmental Engineering Department, American University of Beirut, P.O. Box 11-0236, Beirut, Lebanon
| | - George M Ayoub
- Civil and Environmental Engineering Department, American University of Beirut, P.O. Box 11-0236, Beirut, Lebanon
| | - Lilian Malaeb
- Civil and Environmental Engineering Department, American University of Beirut, P.O. Box 11-0236, Beirut, Lebanon.
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15
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Soros A, Amburgey JE, Stauber CE, Sobsey MD, Casanova LM. Turbidity reduction in drinking water by coagulation-flocculation with chitosan polymers. JOURNAL OF WATER AND HEALTH 2019; 17:204-218. [PMID: 30942771 DOI: 10.2166/wh.2019.114] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Turbidity reduction by coagulation-flocculation in drinking water reduces microbes and organic matter, increasing effectiveness of downstream treatment. Chitosan is a promising household water coagulant, but needs parameters for use. This study tested the effects of chitosan dose, molecular weight (MW), degree of deacetylation (DD), and functional groups on bentonite and kaolinite turbidity reduction in model household drinking water. Higher MW or DD produced greater reductions. Highest reductions were at doses 1 and 3 mg/L by MW >50,000 or >70% DD (residual turbidity <5 NTU). Higher doses did not necessarily continually increase reduction. For functional groups, 3 mg/L produced the highest reductions by lactate, acetate, and HCl, and lower reductions of kaolinite than bentonite. Doses where the point of zero charge was observed clustered around 3 mg/L. Chitosan reduced clay turbidity in water; effectiveness was influenced by dose, clay type, MW, DD, and functional groups. Reduction did not necessarily increase with MW. Bentonite had a broader effective dose range and higher reduction at the optimal dose than kaolinite. Chitosans with and without functional groups performed similarly. The best of the studied doses was 3 mg/L. Chitosans are promising for turbidity reduction in low-resource settings if combined with sedimentation and/or filtration.
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Affiliation(s)
- Ampai Soros
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina Chapel Hill, CB 7431, Chapel Hill, NC 27599, USA
| | - James E Amburgey
- Civil and Environmental Engineering Department, William States Lee College of Engineering, University of North Carolina Charlotte, 9201 University City Boulevard, Charlotte, NC 28223-0001, USA
| | - Christine E Stauber
- Division of Environmental Health, School of Public Health, Georgia State University, P.O. Box 3995, Atlanta, GA 30302, USA E-mail:
| | - Mark D Sobsey
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina Chapel Hill, CB 7431, Chapel Hill, NC 27599, USA
| | - Lisa M Casanova
- Division of Environmental Health, School of Public Health, Georgia State University, P.O. Box 3995, Atlanta, GA 30302, USA E-mail:
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16
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Effects of high turbidity seawater on removal of boron and transparent exopolymer particles by chemical oxo-precipitation. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2018.02.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Zhang Z, Jing R, He S, Qian J, Zhang K, Ma G, Chang X, Zhang M, Li Y. Coagulation of low temperature and low turbidity water: Adjusting basicity of polyaluminum chloride (PAC) and using chitosan as coagulant aid. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.05.051] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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18
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Amriani F, Bani O, Muryanto M, Sari AA, Sudiyani Y. The enhancement of black liquor treatment by applying a natural flocculant and converting its sludge to a high‐benefit product. CAN J CHEM ENG 2018. [DOI: 10.1002/cjce.23300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Feni Amriani
- Research Center for ChemistryIndonesian Institute of SciencesKawasan PUSPIPTEK SerpongBanten 15314Indonesia
| | - Okta Bani
- Department of Chemical EngineeringUniversity of Sumatera UtaraPadang BulanMedanIndonesia 20155
| | - Muryanto Muryanto
- Research Center for ChemistryIndonesian Institute of SciencesKawasan PUSPIPTEK SerpongBanten 15314Indonesia
| | - Ajeng Arum Sari
- Research Center for ChemistryIndonesian Institute of SciencesKawasan PUSPIPTEK SerpongBanten 15314Indonesia
| | - Yanni Sudiyani
- Research Center for ChemistryIndonesian Institute of SciencesKawasan PUSPIPTEK SerpongBanten 15314Indonesia
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19
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Almeida AM, Wada EYB, Wasserman JC. Volumetric modeling of two sludge piles from water treatment plants in a Brazilian reservoir. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 77:355-363. [PMID: 29377820 DOI: 10.2166/wst.2017.515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Water treatment plants are designed to continuously produce drinkable water, meeting defined criteria of potability. However, besides potable water, these plants produce sludges that are disposed of in the environment. The present work aimed to evaluate the sludges generated in two water treatment plants and disposed of in the margin of the Juturnaíba dam. Since alum has been used as a flocculating agent in these two plants, the concentrations of aluminum were measured in the sludges and in surface sediments. The generated piles are extremely soft to walk on and difficult to measure, so indirect modeling procedures had to be applied. The calculated mass of the sludge piles at each plant are similar and respectively 60,370 and 61,479 tons. The aluminum content of the residues, calculated according to its dosage, was 33.2 and 32.6 g kg-1 in the piles from the two plants. The amount of alum dosed to the water corresponds almost to the excess of aluminum in the sludge, compared to the sediments. It was concluded that regardless of the fact that residues are disposed of in very restricted areas, they are directly in contact with the water and may constitute a threat for the environment and humans' health.
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Affiliation(s)
- Aline Mansur Almeida
- UFF Network on Environmental and Sustainable Development and Post-Graduation Program in Geosciences - University Federal Fluminense, Av. Litorânea, Instituto de Geociências, office 406, Boa Viagem, Niterói, RJ 24210-346, Brazil E-mail:
| | - Eduardo Yukio Basílio Wada
- UFF Network on Environmental and Sustainable Development and Post-Graduation Program in Geosciences - University Federal Fluminense, Av. Litorânea, Instituto de Geociências, office 406, Boa Viagem, Niterói, RJ 24210-346, Brazil E-mail:
| | - Julio Cesar Wasserman
- UFF Network on Environmental and Sustainable Development and Post-Graduation Program in Geosciences - University Federal Fluminense, Av. Litorânea, Instituto de Geociências, office 406, Boa Viagem, Niterói, RJ 24210-346, Brazil E-mail:
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20
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Feng L, Zheng H, Tang X, Zheng X, Liu S, Sun Q, Wang M. The investigation of the specific behavior of a cationic block structure and its excellent flocculation performance in high-turbidity water treatment. RSC Adv 2018; 8:15119-15133. [PMID: 35541323 PMCID: PMC9079996 DOI: 10.1039/c8ra02006j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 04/07/2018] [Indexed: 11/21/2022] Open
Abstract
The fabrication of a cationic polyacrylamide (CPAM) with high efficiency and economy has been highly desired in the field of high-turbidity water treatment. This study introduced an ultrasound (US)-initiated template polymerization (UTP) method to develop a novel cationic templated polyacrylamide (TPAA) with a microblock structure. TPAA was prepared using acrylamide (AM) and sodium (3-acrylamidopropyl)trimethylammonium chloride (ATAC) as the monomers and sodium polyacrylate (NaPAA) as the template. Factors that affected polymerization such as the ultrasound power, ultrasound time, initiator concentration, pH, and mAM : mATAC and nNaPAA : nATAC values were investigated. The properties of the polymers were characterized by Fourier transform infrared spectroscopy (FTIR), 1H nuclear magnetic resonance spectroscopy (1H NMR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The results indicated the successful formation of a cationic microblock structure in TPAA. In addition, TPAA displayed favorable thermal decomposition properties and a rough and coarse surface morphology, as shown by analyses using TGA and SEM, respectively. Moreover, a zip (type I) template polymerization mechanism was identified via analyses of the association constant (KM), conversion (Cv) and polymerization rate (Rp). The flocculation performance of the templated copolymer TPAA was evaluated by treating high-turbidity water. According to the results for the zeta potentials and FTIR spectra of the generated flocs, it was indicated that the cationic microblocks in the templated copolymer could greatly enhance its charge neutralization, patching and bridging ability, and therefore excellent flocculation performance (residual turbidity: 5.8 NTU, Df: 1.89, floc size d50: 608.404 μm and floc kinetic: 15.86 × 10−4 s−1) for treating high-turbidity water was achieved. The fabrication of a cationic polyacrylamide (CPAM) with high efficiency and economy has been highly desired in the field of high-turbidity water treatment.![]()
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Affiliation(s)
- Li Feng
- State Key Laboratory of Coal Mine Disaster Dynamics and Control
- Chongqing University
- Chongqing 400044
- China
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
| | - Huaili Zheng
- State Key Laboratory of Coal Mine Disaster Dynamics and Control
- Chongqing University
- Chongqing 400044
- China
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
| | - Xiaomin Tang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Xinyu Zheng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Shuang Liu
- State Key Laboratory of Coal Mine Disaster Dynamics and Control
- Chongqing University
- Chongqing 400044
- China
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
| | - Qiang Sun
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Moxi Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- Ministry of Education
- Chongqing University
- Chongqing 400045
- China
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21
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Faye MCAS, Zhang Y, Yang J. Extracellular polymeric substances and sludge solid/liquid separation underMoringa oleiferaand chitosan conditioning: a review. ACTA ACUST UNITED AC 2017. [DOI: 10.1080/21622515.2017.1282544] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Marie Christine Amie Sene Faye
- Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Yanrong Zhang
- Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Jiakuan Yang
- Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
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22
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Feng L, Zheng H, Gao B, Zhang S, Zhao C, Zhou Y, Xu B. Fabricating an anionic polyacrylamide (APAM) with an anionic block structure for high turbidity water separation and purification. RSC Adv 2017. [DOI: 10.1039/c7ra05151d] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ultraviolet (UV)-initiated template polymerization (UTP) was used as a feasible strategy to prepare a novel anionic polyacrylamide (APAM) with a microblock structure.
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Affiliation(s)
- Li Feng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Huaili Zheng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Baoyu Gao
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Shixin Zhang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Chuanliang Zhao
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Yuhao Zhou
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- Ministry of Education
- Chongqing University
- Chongqing 400045
- China
| | - Bincheng Xu
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment
- Ministry of Education
- Chongqing University
- Chongqing 400045
- China
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23
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Bhalkaran S, Wilson LD. Investigation of Self-Assembly Processes for Chitosan-Based Coagulant-Flocculant Systems: A Mini-Review. Int J Mol Sci 2016; 17:ijms17101662. [PMID: 27706052 PMCID: PMC5085695 DOI: 10.3390/ijms17101662] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 09/07/2016] [Accepted: 09/23/2016] [Indexed: 11/22/2022] Open
Abstract
The presence of contaminants in wastewater poses significant challenges to water treatment processes and environmental remediation. The use of coagulation-flocculation represents a facile and efficient way of removing charged particles from water. The formation of stable colloidal flocs is necessary for floc aggregation and, hence, their subsequent removal. Aggregation occurs when these flocs form extended networks through the self-assembly of polyelectrolytes, such as the amine-based polysaccharide (chitosan), which form polymer “bridges” in a floc network. The aim of this overview is to evaluate how the self-assembly process of chitosan and its derivatives is influenced by factors related to the morphology of chitosan (flocculant) and the role of the solution conditions in the flocculation properties of chitosan and its modified forms. Chitosan has been used alone or in conjunction with a salt, such as aluminum sulphate, as an aid for the removal of various waterborne contaminants. Modified chitosan relates to grafted anionic or cationic groups onto the C-6 hydroxyl group or the amine group at C-2 on the glucosamine monomer of chitosan. By varying the parameters, such as molecular weight and the degree of deacetylation of chitosan, pH, reaction and settling time, dosage and temperature, self-assembly can be further investigated. This mini-review places an emphasis on the molecular-level details of the flocculation and the self-assembly processes for the marine-based biopolymer, chitosan.
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Affiliation(s)
- Savi Bhalkaran
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
| | - Lee D Wilson
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
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24
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Ma C, Hu W, Pei H, Xu H, Pei R. Enhancing integrated removal of Microcystis aeruginosa and adsorption of microcystins using chitosan-aluminum chloride combined coagulants: Effect of chemical dosing orders and coagulation mechanisms. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2015.11.056] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Ma C, Pei H, Hu W, Cheng J, Xu H, Jin Y. Significantly enhanced dewatering performance of drinking water sludge from a coagulation process using a novel chitosan–aluminum chloride composite coagulant in the treatment of cyanobacteria-laden source water. RSC Adv 2016. [DOI: 10.1039/c6ra11989a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The enhanced dewatering performance and the fate of cyanobacterial cells in the filtration of cyanobacteria-laden sludge, generated by a coagulation process using a novel composite chitosan–aluminum chloride (CTSAC) coagulant, were studied.
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Affiliation(s)
- Chunxia Ma
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Haiyan Pei
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
- Shandong Provincial Engineering Center on Environmental Science and Technology
| | - Wenrong Hu
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
- Shandong Provincial Engineering Center on Environmental Science and Technology
| | - Juan Cheng
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Hangzhou Xu
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Yan Jin
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
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26
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Modeling Typhoon‐Induced Alterations on River Sediment Transport and Turbidity Based on Dynamic Landslide Inventories: Gaoping River Basin, Taiwan. WATER 2015. [DOI: 10.3390/w7126666] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Dharani M, Balasubramanian S. Synthesis and characterization of chitosan-g-N-methyl piperazinium chloride: A hybrid flocculant. Int J Biol Macromol 2015; 81:778-84. [DOI: 10.1016/j.ijbiomac.2015.09.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 09/03/2015] [Accepted: 09/09/2015] [Indexed: 10/23/2022]
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28
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Ang W, Mohammad A, Teow Y, Benamor A, Hilal N. Hybrid chitosan/FeCl3 coagulation–membrane processes: Performance evaluation and membrane fouling study in removing natural organic matter. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.07.053] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Sargın İ, Kaya M, Arslan G, Baran T, Ceter T. Preparation and characterisation of biodegradable pollen-chitosan microcapsules and its application in heavy metal removal. BIORESOURCE TECHNOLOGY 2015; 177:1-7. [PMID: 25479387 DOI: 10.1016/j.biortech.2014.11.067] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 11/14/2014] [Accepted: 11/15/2014] [Indexed: 06/04/2023]
Abstract
Biosorbents have been widely used in heavy metal removal. New resources should be exploited to develop more efficient biosorbents. This study reports the preparation of three novel chitosan microcapsules from pollens of three common, wind-pollinated plants (Acer negundo, Cupressus sempervirens and Populus nigra). The microcapsules were characterized (Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and elemental analysis) and used in removal of heavy metal ions: Cd(II), Cr(III), Cu(II), Ni(II) and Zn(II). Their sorption capacities were compared to those of cross-linked chitosan beads without pollen grains. C. sempervirens-chitosan microcapsules exhibited better performance (Cd(II): 65.98; Cu(II): 67.10 and Zn(II): 49.55 mg g(-1)) than the other microcapsules and the cross-linked beads. A. negundo-chitosan microcapsules were more efficient in Cr(III) (70.40 mg g(-1)) removal. P. nigra-chitosan microcapsules were found to be less efficient. Chitosan-pollen microcapsules (except P. nigra-chitosan microcapsules) can be used in heavy metal removal.
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Affiliation(s)
- İdris Sargın
- Selcuk University, Faculty of Science, Department of Chemistry, 42075 Konya, Turkey.
| | - Murat Kaya
- Aksaray University, Faculty of Science and Letters, Department of Biotechnology and Molecular Biology, 68100 Aksaray, Turkey
| | - Gulsin Arslan
- Selcuk University, Faculty of Science, Department of Biochemistry, 42075 Konya, Turkey
| | - Talat Baran
- Aksaray University, Faculty of Science, Department of Chemistry, 68100 Aksaray, Turkey
| | - Talip Ceter
- Department of Biology, Faculty of Arts and Sciences, Kastamonu University, 37100 Kastamonu, Turkey
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