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Reusable kaolin impregnated aminated chitosan composite beads for efficient removal of Congo red dye: isotherms, kinetics and thermodynamics studies. Sci Rep 2022; 12:12972. [PMID: 35902774 PMCID: PMC9334362 DOI: 10.1038/s41598-022-17305-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 07/22/2022] [Indexed: 12/12/2022] Open
Abstract
In this investigation, Kaolin (K) impregnated aminated chitosan (AM-CTS) composite beads were fabricated with multi-features including low-cost, high performance, renewable and ease of separation for adsorption of anionic Congo red (CR) dye. Characterization tools such as FTIR, XRD, SEM, TGA, BET, XPS and Zeta potential were thoroughly employed to confirm the successful formulation process. The results revealed that K@ AM-CTS composite beads displayed higher specific surface area (128.52 m2/g), while the thermal stability was prominently improved compared to pure AM-CTS. In addition, the adsorption equilibrium of CR dye was accomplished rapidly and closely gotten within 45 min. The removal efficiency was significantly enriched and reached 90.7% with increasing kaolin content up to 0.75%, compared to 20.3 and 58% for pristine kaolin and AM-CTS, respectively. Moreover, the adsorption process obeyed the pseudo-first order kinetic model, while data were agreed with the Freundlich isotherm model with a maximum adsorption capacity reached 104 mg/g at pH 6. Furthermore, D–R isotherm model demonstrated the physical adsorption process of CR dye, which includes the electrostatic interactions, ion exchange and H-bonding. Thermodynamics evidenced the spontaneous and endothermic nature of the adsorption process. Interestingly, the developed K@AM-CTS composites beads showed better reusability for eight consecutive cycles, suggesting their feasible applicability for adsorptive removal anionic dyes from polluted aquatic bodies.
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Wang T, Tang X, Zhang S, Zheng J, Zheng H, Fang L. Roles of functional microbial flocculant in dyeing wastewater treatment: Bridging and adsorption. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121506. [PMID: 31699487 DOI: 10.1016/j.jhazmat.2019.121506] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/23/2019] [Accepted: 10/18/2019] [Indexed: 06/10/2023]
Abstract
Congo red (CR) is a typical and widely used azo dye in industries. It possesses the serious threat to ecosystem and public for its indiscriminate discharge. Microbial flocculant (MBF) with various functional groups is a potential flocculant applied in dyeing wastewater treatment, and it has the advantages of high treatment efficiency, biodegradability and non-toxicity. In this study, the functional groups, amino group, ammonium group and acyloxy group, were grafted onto MBF to further improve its thermal stability, solubility and performance. Grafting copolymerization occurred at the amino group of MBF was confirmed by XPS. Polyaluminum silicate (PSA) and self-prepared functional microbial flocculant, MBF-g-P(AM-DAC), played different roles in CR wastewater treatment. PSA contributed to charge neutralization, but its yielded flocs were small. On the contrary, MBF-g-P(AM-DAC) possessed weak charge neutralization but big flocs. Its settlement efficiency has significantly improved. The unsaturated active sites on MBF-g-P(AM-DAC) and its flocs contributed to the adsorption of CR in terms of high surface area and adsorption capacity of the flocs. Physical adsorption and chemical adsorption were both discovered in the treatment.
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Affiliation(s)
- Tao Wang
- Chongqing Key Laboratory of Catalysis & Functional Organic Molecules, College of Environment and Resources, Chongqing Technology and Business University, Chongqing, 400067, PR China
| | - Xiaomin Tang
- Chongqing Key Laboratory of Catalysis & Functional Organic Molecules, College of Environment and Resources, Chongqing Technology and Business University, Chongqing, 400067, PR China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing, 400045, PR China.
| | - Shixin Zhang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing, 400045, PR China
| | - Jie Zheng
- Chongqing Key Laboratory of Catalysis & Functional Organic Molecules, College of Environment and Resources, Chongqing Technology and Business University, Chongqing, 400067, PR China
| | - Huaili Zheng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing, 400045, PR China
| | - Ling Fang
- Chongqing Key Laboratory of Catalysis & Functional Organic Molecules, College of Environment and Resources, Chongqing Technology and Business University, Chongqing, 400067, PR China
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3
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Zhao C, Zheng H, Sun Y, Zhang S, Liang J, Liu Y, An Y. Evaluation of a novel dextran-based flocculant on treatment of dye wastewater: Effect of kaolin particles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 640-641:243-254. [PMID: 29859440 DOI: 10.1016/j.scitotenv.2018.05.286] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/23/2018] [Accepted: 05/23/2018] [Indexed: 06/08/2023]
Abstract
Graft modified flocculants have recently received increasing attention in the field of water treatment as they have the combinative advantages of synthetic and natural polymeric flocculants. In this work, surface-active monomer benzyl(methacryloyloxyethyl)dimethylammonium chloride (BMDAC) was selected to graft on dextran (DX) with high molecular weight (10.3 × 106 g/mol) produced through enzyme-catalyzed process in order to remove dissolved dyes from wastewater. The flocculant (DAB) was fabricated by ultrasound initiated polymerization technique, and the structure characterization of FTIR, 1H/12C NMR, XRD and XPS spectrum confirmed the successful grafting. Then the Congo red (CR) removal efficiency by DAB was optimized based on the flocculation conditions, including wastewater initial pH, flocculant dosage and initial dye concentration. The effect of suspended solids on the removal of dyes was evaluated in kaolin-CR simulated wastewater. The results indicated that the optimal removal efficiency of CR was 68.1% and 88.2% in single CR and kaolin-CR flocculation system, respectively. The improvement of removal efficiency was attributed to the fact that partial CR molecules were adsorbed onto kaolin particles before flocculation, and were synergistically flocculated accompanied by kaolin particles. Finally, the flocculation mechanism was discussed by a detailed investigation of the zeta potentials, FTIR and XPS spectra of flocs, which can provide important reference for optimizing the flocculation conditions and designing novel high-performance flocculants.
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Affiliation(s)
- Chuanliang Zhao
- 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, State Ministry of Education, Chongqing University, Chongqing 400045, China
| | - 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, State Ministry of Education, Chongqing University, Chongqing 400045, China.
| | - Yongjun Sun
- Jiangsu Key Laboratory of Industrial Water-Conservation & Emission Reduction, College of Environment, Nanjing Tech University, Nanjing 211800, China
| | - Shixin Zhang
- 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, State Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Jianjun Liang
- 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, State Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Yongzhi 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, State Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Yanyan An
- 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, State Ministry of Education, Chongqing University, Chongqing 400045, China
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4
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Liu X, Chang S, Chen X, Ge X, Qian C. Efficient Ullmann C–X coupling reaction catalyzed by a recoverable functionalized-chitosan supported copper complex. NEW J CHEM 2018. [DOI: 10.1039/c8nj02677g] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three different types of functionalized-CS were prepared and anchored with copper salts for use as the catalyst for the Ullmann C–X coupling reaction.
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Affiliation(s)
- Xuemin Liu
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- P. R. China
| | - Shuo Chang
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- P. R. China
| | - Xinzhi Chen
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- P. R. China
| | - Xin Ge
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- P. R. China
| | - Chao Qian
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- P. R. China
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Stawiński W, Węgrzyn A, Freitas O, Chmielarz L, Mordarski G, Figueiredo S. Simultaneous removal of dyes and metal cations using an acid, acid-base and base modified vermiculite as a sustainable and recyclable adsorbent. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 576:398-408. [PMID: 27794226 DOI: 10.1016/j.scitotenv.2016.10.120] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 10/13/2016] [Accepted: 10/17/2016] [Indexed: 05/15/2023]
Abstract
The aim of this work was the modification of vermiculite in order to produce a low cost, efficient and sustainable adsorbent for dyes and metals. Three activation methods consisting of acid, base and combined acid/base treatment were applied to improve the of vermiculite's adsorption properties. Adsorbents were tested in single, bi- and tricomponent solutions containing cationic dyes and Cu2+ cations. The raw material showed low adsorption capacity for dyes and metal. The acid/base treated vermiculite had very good adsorption capacity toward dyes while the maximum adsorption capacity for Cu2+ did not change comparing to the starting material. The alkaline treated vermiculite was a good adsorbent for metals, while still being able to remove dyes on the level of the not treated material. Moreover, it was shown that the materials may be regenerated and used in several adsorption-desorption cycles. Furthermore, it was possible to separate adsorbed dyes from metals that were desorbed, using as eluents ethanol/NaCl and 0.05M HNO3, respectively. This opens a possibility for sustainable disposal and neutralization of both of the pollutants or for their further applications in other processes.
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Affiliation(s)
- Wojciech Stawiński
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal.
| | - Agnieszka Węgrzyn
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Kraków, Poland.
| | - Olga Freitas
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal.
| | - Lucjan Chmielarz
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Kraków, Poland.
| | - Grzegorz Mordarski
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland.
| | - Sónia Figueiredo
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal.
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Li JJ, Wang CC, Fu HF, Cui JR, Xu P, Guo J, Li JR. High-performance adsorption and separation of anionic dyes in water using a chemically stable graphene-like metal–organic framework. Dalton Trans 2017; 46:10197-10201. [DOI: 10.1039/c7dt02208e] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
MOF BUC-17 was used to conduct efficiently selective uptake of organic dyes, and achieve rapid separation of CR and MB from their mixture.
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Affiliation(s)
- Jun-Jiao Li
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation
- Beijing University of Civil Engineering and Architecture
- Beijing
- China
| | - Chong-Chen Wang
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation
- Beijing University of Civil Engineering and Architecture
- Beijing
- China
- Beijing Advanced Innovation Centre for Future Urban Design
| | - Hui-fen Fu
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation
- Beijing University of Civil Engineering and Architecture
- Beijing
- China
| | - Jing-Rui Cui
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation
- Beijing University of Civil Engineering and Architecture
- Beijing
- China
| | - Peng Xu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology
- National Centre for Nanoscience and Technology
- Beijing
- P. R China
| | - Jie Guo
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation
- Beijing University of Civil Engineering and Architecture
- Beijing
- China
| | - Jian-Rong Li
- Department of Chemistry and Chemical Engineering
- College of Environmental and Energy Engineering
- Beijing University of Technology
- Beijing 100022
- China
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E A K N, S D, Narayanan V, A S. Chitosan stabilized Ag-Au nanoalloy for colorimetric sensing and 5-Fluorouracil delivery. Int J Biol Macromol 2016; 95:862-872. [PMID: 27773838 DOI: 10.1016/j.ijbiomac.2016.10.066] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 10/15/2016] [Accepted: 10/19/2016] [Indexed: 01/28/2023]
Abstract
Fluorescent CS/Ag-Au (chitosan/silver-gold) nanocomposite containing different weight percentage of Ag and Au was synthesized using the chemical reduction method. 5-Fluorouracil (5-FU) encapsulated nanocomposite was also synthesized and its cytotoxicity towards breast cancer cell lines (MCF-7) studied. The XRD pattern of the nanocomposite shows peaks of chitosan, silver and gold. The peaks corresponding to gold and silver indicate the face centered cubic structure of silver and gold nanoparticles. The polymer matrix nanocomposite structure with chitosan as the matrix and silver-gold as the filler phase is evident from the high resolution transmission electron microscopy (HRTEM) images and an increase in particle size from∼5nm to about 12nm is noticeable on encapsulation of 5-Fluorouracil (5-FU). The presence of fluorine in the case of 5-FU encapsulated nanocomposite and the presence of reflections corresponding to 5-FU in the SAED pattern confirms the encapsulation of 5-FU into the nanocomposite, which is also confirmed by elemental mapping. The presence of a single surface plasmon resonance (SPR) peak in the case of the nanocomposite in a position in between the SPR bands of pure silver and gold nanoparticles confirms the formation of Ag-Au alloy and the elemental mapping results obtained for the nanocomposite also supports the UV-vis results. The photoluminescence (PL) spectrum clearly shows an emission peak in the near infrared region (700-900nm), which makes the nanocomposite suitable for use in cellular imaging. The application of the nanocomposite as a colorimetric sensor was also studied and it was found to be useful for the specific detection of mercury (Hg) without much interference and the detection limit was found to be 5.0×10-8M.
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Affiliation(s)
- Nivethaa E A K
- Material Science Centre, Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai-25, India
| | - Dhanavel S
- Material Science Centre, Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai-25, India
| | - V Narayanan
- Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai 600025, India
| | - Stephen A
- Material Science Centre, Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai-25, India.
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8
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Xu S, Gao Y, Sun X, Yue M, Yue Q, Gao B. Facile one-pot synthesis of carbon incorporated three-dimensional hierarchical TiO2 nanostructure for highly efficient pollutant removal. RSC Adv 2016. [DOI: 10.1039/c6ra20188a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The facile one-pot synthesized carbon incorporated 3D hierarchical TiO2 nanostructures simultaneously possessed superior adsorption capability and photocatalytic activity towards pollutants.
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Affiliation(s)
- Shiping Xu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Yuan Gao
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Xiang Sun
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Min Yue
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Qinyan Yue
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Baoyu Gao
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
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Nivethaa EAK, Narayanan V, Stephen A. Synthesis and spectral characterization of silver embedded chitosan matrix nanocomposite for the selective colorimetric sensing of toxic mercury. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 143:242-250. [PMID: 25733251 DOI: 10.1016/j.saa.2015.01.075] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 01/20/2015] [Accepted: 01/29/2015] [Indexed: 06/04/2023]
Abstract
Polymer matrix type chitosan-silver nanocomposite containing different weight percentage of silver was synthesized by the chemical method. HRTEM images confirm the embedment of silver in the chitosan matrix. The binding of silver to the NH2 and OH groups of chitosan is evident from XPS and FTIR studies. An increase in the absorbance observed from UV-Vis analysis on raising the weight percentage of silver showed the increase in the amount of silver in the nanocomposite. The face centered cubic structure of silver and the semi-crystalline nature of chitosan are evident from the XRD studies. On interaction with mercury the UV-Vis spectra of the composite showed a decrease in intensity and a blue shift confirming the use of the composite as a colorimetric sensor for the detection of mercury. The limit of detection was found to be about 7.2×10(-8)M. High specificity and the sensitivity of the environmental friendly and non-toxic nanocomposite to detect very low concentrations of mercury make the system a perspective one.
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Affiliation(s)
- E A K Nivethaa
- Material Science Centre, Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai 600 025, India
| | - V Narayanan
- Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India
| | - A Stephen
- Material Science Centre, Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai 600 025, India.
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10
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Utilization of diatomite/chitosan–Fe (III) composite for the removal of anionic azo dyes from wastewater: Equilibrium, kinetics and thermodynamics. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2014.12.015] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Nivethaa EAK, Dhanavel S, Narayanan V, Vasu CA, Stephen A. An in vitro cytotoxicity study of 5-fluorouracil encapsulated chitosan/gold nanocomposites towards MCF-7 cells. RSC Adv 2015. [DOI: 10.1039/c4ra11615a] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic outlining the synthesis of 5FU loaded CS/Au nanocomposite and its application.
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Affiliation(s)
- E. A. K. Nivethaa
- Material Science Centre
- Department of Nuclear Physics
- University of Madras
- Chennai-25
- India
| | - S. Dhanavel
- Material Science Centre
- Department of Nuclear Physics
- University of Madras
- Chennai-25
- India
| | - V. Narayanan
- Department of Inorganic Chemistry
- University of Madras
- Chennai 600 025
- India
| | - C. Arul Vasu
- Department of Zoology
- University of Madras
- Chennai 600 025
- India
| | - A. Stephen
- Material Science Centre
- Department of Nuclear Physics
- University of Madras
- Chennai-25
- India
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Wu J, Zhuang W, Ying H, Jiao P, Li R, Wen Q, Wang L, Zhou J, Yang P. Acetone-butanol-ethanol competitive sorption simulation from single, binary, and ternary systems in a fixed-bed of KA-I resin. Biotechnol Prog 2014; 31:124-34. [DOI: 10.1002/btpr.2019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 09/13/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Jinglan Wu
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing 210009 P. R. China
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Wei Zhuang
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing 210009 P. R. China
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Hanjie Ying
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing 210009 P. R. China
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Pengfei Jiao
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Renjie Li
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Qingshi Wen
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Lili Wang
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Jingwei Zhou
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Pengpeng Yang
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
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13
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Sun Y, Lin J, Zhan Y. Adsorption of Congo Red from Aqueous Solution on Surfactant-Modified Zeolites with Different Coverage Types: Behavior and Mechanism. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2013.790448] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Paques JP, van der Linden E, van Rijn CJ, Sagis LM. Alginate submicron beads prepared through w/o emulsification and gelation with CaCl2 nanoparticles. Food Hydrocoll 2013. [DOI: 10.1016/j.foodhyd.2012.11.012] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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15
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Paques JP, van der Linden E, Sagis LMC, van Rijn CJM. Food-grade submicrometer particles from salts prepared using ethanol-in-oil mixtures. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:8501-8509. [PMID: 22853628 DOI: 10.1021/jf3023029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A simple method for preparing food-grade particles in the submicrometer range of ethanol soluble salts using ethanol-in-oil (E/O) mixtures is described. Salts CaCl2·2H2O and MgCl2·6H2O were dissolved in ethanol that subsequently was mixed with a medium-chain triglyceride oil phase. It was found that type and concentration of salt have a significant influence on the miscibility of ethanol and oil phase and on the stability of E/O mixtures. The ethanol phase was evaporated from the mixture at elevated temperatures, and salt particles with dimensions in the submicrometer range (6-400 nm) remained suspended in the oil phase. It was found that the concentration of salt and volume fraction of ethanol in MCT oil have a significant influence on the size distribution of salt particles. The size of CaCl2 and MgCl2 submicrometer particles was ascertained by scanning electron microscopy and dynamic light scattering.
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Affiliation(s)
- Jerome P Paques
- Laboratory of Organic Chemistry, Wageningen University , Dreijenplein 8, 6703 HB Wageningen, The Netherlands
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Li J, Gao Q, Ua Zhang H, An Zhou Y, Wang H. Effect of MWCNTs Doping on the Morphology, Structure and Properties of Chitosan Beads. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2012. [DOI: 10.1080/10601325.2012.697042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Song RH, Wang XH, Zhang GH, Zhao L, Sun XF, Wang SG, Gao BY. Simulation of equilibrium system and release behaviors of both oxytetracycline and copper on aerobic granules in a sequencing batch reactor. Biochem Eng J 2011. [DOI: 10.1016/j.bej.2011.06.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wang XH, Song RH, Teng SX, Gao MM, Ni JY, Liu FF, Wang SG, Gao BY. Characteristics and mechanisms of Cu(II) biosorption by disintegrated aerobic granules. JOURNAL OF HAZARDOUS MATERIALS 2010; 179:431-437. [PMID: 20362391 DOI: 10.1016/j.jhazmat.2010.03.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Revised: 03/04/2010] [Accepted: 03/05/2010] [Indexed: 05/29/2023]
Abstract
Disintegrated aerobic granules (DAG) as an effective biosorbent had great potential to remove Cu(II) from aqueous solution. The effects of solution pH value, contact time, initial Cu(II) concentration on the biosorption were investigated. Kinetic studies indicate that pseudo-second-order model with correlation coefficients of 0.9999 best fits the Cu(II) biosorption process. Investigation of the biosorption mechanisms shows that Cu(II) biosorption is associated with a significant release of Ca(II). The adsorption capacity of extracted extracellular polymeric substances (EPS) was 2.34 times as much as that of pristine DAG, indicating the significant role of EPS in adsorption. In order to determine the role of different functional groups, DAG was chemically modified to block specific functional groups and was then used in the adsorption of Cu(II). The anionic carboxyl group, was identified as the key binding site for the cationic Cu(II). Results reveal that ion exchange is the most important biosorption mechanism but other mechanisms to some extent like electrostatic interaction, involving in functional groups, also play a part.
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Affiliation(s)
- Xin-Hua Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
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