Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx

Nada Mohamed Bayomi

doi:doi:10.11648/j.ajqcms.20190301.14

| Peer-Reviewed

Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx

Nada Mohamed Bayomi

Published in American Journal of Quantum Chemistry and Molecular Spectroscopy (Volume 3, Issue 1)

Received: 21 July 2019 Accepted: 13 August 2019 Published: 3 September 2019

Views: Downloads:

Download PDF

Share This Article

Twitter
Linked In
Facebook

Abstract

Modified chitosan was prepared by reaction of cross-linked chitosan beads (CLCB) with acrylonitrile via cyanoethylation reaction of amino group which supports chitosan with nitrile groups, then the resulting cyanoethylated chitosan beads (CECB) were converted to chitosan-amidoxime chelating resin (CACR) via reaction with hydroxylamine hydrochloride. The resulted chelating resin was in the form of beads in order to be easy to capture heavy metals from water. Characterization was made using FTIR Spectroscopy, thermal gravimetric analysis (TGA), differential scanning calorimeter (DSC), BET surface area, and scanning electron microscope (SEM). The adsorption of cobalt and chromium from aqueous solution onto CACR has been investigated as a function of pH, metal ion concentration, contact time, metal ion concentration and temperature. Adsorption experiments indicated that the adsorption capacity was dependent on operating variables which are minimally (47.84, 50.68mg/g) and maximally (600, 147.33 mg/g) for Cr(III) and Co(II) respectively. Results revealed that CACR has high affinity toward Co(II) and Cr(III) ions. The saturated adsorption capacities at 25°C were 147.33 and 600 mg/g resin for Co(II) and Cr(III), respectively. Equilibrium isotherm data were analyzed using Langmuir, Freundlich, and Temkin isotherm models for Co(II) and Cr(III). The adsorption was well fitted by Langmuir isotherm model for Co(II) and Cr(III). The kinetic data indicated that adsorption fitted well with the pseudo-second-order kinetic model for Co(II) and Cr(III). Equilibrium distribution coefficient was obtained at different temperatures Thermodynamic parameters showed that the sorption is endothermic, spontaneous and contributes to increase ∆S of the system. The adsorption performance of CACR toward Co (II) and Cr(III) using fixed bed column method was investigated under different conditions. Mathematical models of Adams–Bohart, Thomas and Yoon–Nelson were applied to the experimental data to analyze the column performance. The results fitted well to the Adams–Bohart, Thomas and Yoon–Nelson models.

Published in	American Journal of Quantum Chemistry and Molecular Spectroscopy (Volume 3, Issue 1)
DOI	10.11648/j.ajqcms.20190301.14
Page(s)	17-30
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Chitosan, Crosslinking, Cyanoethylation, Cyanoethylated Chitosan Beads, Chitosan-amidoxime Chelating Resin, Adsorption, Chromium, Cobalt

References

[1]	S. C. Apte, G. E. Batley, Trace metal speciation of labile chemical species in natural waters and sediments: non-electrochemical approaches, Anal. Phys. Chem. Environ. Syst. 3 (1995) 259-306.
[2]	B. S. Garg, Sharma, R. K. Bhojak, N. Mittal. Chelating Resins and Their Applications in the Analysis of Trace Metal Ions, J. Microchem. 61 (1999) 94-114.
[3]	Sharma, R. K. Mittal, S. Koel, Analysis of trace amounts of metal ions using silica-based chelating resins: A green analytical method, Crit. Rev. Anal. Chem. 33 (2003) 183-197.
[4]	S. K. Sahni, J. Reedijk, Coordination chemistry of chelating resins and ion exchangers, Coord. Chem. Rev. 59 (1984) 1-139.
[5]	C. Liu, Chelating resins in analytical chemistry, Journal of the Chinese Chemical Society. 36 (1989) 389-401.
[6]	J. H. Duffus. Heavy metals” – a meaningless term? Pure Applied Chemistry. 74 (2002) 793-807.
[7]	M. A. Tofighy, T. Mohammadi, Adsorption of divalent heavy metal ions from water using carbon nanotube sheets, J. Hazard. Mater. 185 (2011) 140–147.
[8]	H. Deligz, E. Erdem, Comparative studies on the solvent extraction of transition metal cations by calixarene, phenol and ester derivatives, J. Hazard. Mater. 154 (2008) 29–32.
[9]	H. Bessbousse, T. Rhlalou, J. F. Verche`re, L. Lebrun, Removal of heavy metal ions from aqueous solutions by filtration with a novel complexing membrane containning poly(ethyleneimine) in a poly(vinyl alcohol) matrix, J. Membr. Sci. 307 (2008) 249–259.
[10]	R. Kumar, M. Kumar, R. Ahmad, M. A. Barakat, L-Methionine modified Dowex-50 ion-exchanger of reduced size for the separation and removal of Cu(II) and Ni(II) from aqueous solution, Chem. Eng. J. 218 (2013) (32–38).
[11]	N. Wu, Z. Li. Synthesis and characterization of poly (HEA/MALA) hydrogel and its application in removal of heavy metal ions from water, Chem. Eng. J. 215–216 (2013) 894–902.
[12]	Z. Lin, Y. Zhang, Y. Chen, H. Qian. Extraction and recycling utilization of metal ions (Cu2+, Co2+ and Ni2+) with magnetic polymer beads, Chem. Eng. J. 200 (2012) 104–110.
[13]	M. F. Dahr, M. Esmaieli, H. Abolghasemi, A. Shojamoradi, E. S. Pouya, Continuous adsorption study of congo red using tea waste in a fixed-bed column, Desalination Water Treat. 57 (2016) 8437–8446.
[14]	M. A. Barakat, New trends in removing heavy metals from industrial wastewater, Arabian Journal of Chemistry 4 (2011) 361-377.
[15]	E. Nieboer, AA Jusys In: Nriagu JO, Nieboer E (eds) Chromium in the natural and human environments, Wiley (1988).
[16]	A. F. Shaaban, T. Y. Mohamed, D. A. Fadel, N. M. Bayomi, Removal of Ba(II) and Sr(II) ions using modified chitosan beads with pendent amidoxime moieties by batch and fixed bed column methods, Desalination Water Treat. 82 (2017) 131–145.
[17]	A. F. Shaaban, D. A. Fadel, A. A. Mahmoud, M. A. Elkomy, S. M. Elbahy, Synthesis of a new chelating resin bearing amidoxime group for adsorption of Cu(II), Ni(II) and Pb(II) by batch and fixed-bed column methods, J. Environ. Chem. Eng., 2 (2014) 632–641.
[18]	A. F. Shaaban, D. A. Fadel, A. A. Mahmoud, M. A. Elkomy, S. M. Elbahy. Removal of Pb(II), Cd(II), Mn(II) and Zn(II) using iminodiacetate chelating resin by batch and fixed bed column methods, Desalination Water Treat., 51 (2013) 5526–5536.
[19]	D. A. Fadel, S. M. El-Bahy, Y. A. Abdelaziza, Heavy metals removal using iminodiacetate chelating resin by batch and column techniques, Desalination Water Treat., 57 (2016) 25718–25728.
[20]	A. F. Shaaban, D. A. Fadel, A. A. Mahmoud, M. A. Elkomy, S. M. Elbahy, Synthesis and characterization of dithiocarbamate chelating resin and its adsorption performance towards Hg(II), Cd(II) and Pb(II) by batch and fixed-bed column methods, J. Environ. Chem. Eng., 1 (2013) 208–217.
[21]	D. F. Wang, B. J. Liu, Y. Xu, L. Zhang. Chinese patent: 201010119859.6.
[22]	H. Kalavathy, B. Karthik, LR. Miranda, Removal and recovery of Ni and Zn from aqueous solution using activated carbon from Heveabrasilliensis; batch and column studies, Colloids Surf. B. 78 (2010) 291-302.
[23]	Futalan, C. M., C. C. Kan, M. L. Dalida, C. Pascua, M. W. Wan. Fixed-bed column studies on the removal of copper using chitosan immobilized on bentonite, Carbohydr. Polym. 83 (2011) 697-704.
[24]	C. L. de Vasconcelos, B. M. Bezerril, D. E. S. dos Santos, T. N. C. Dantas, M. R. Pereira, J. L. C. Fonseca, Effect of molecular weight and ionic strength on the formation of polyelectrolyte complexes based on poly(methacrylic acid) and chitosan, Biomacromolecules, 7 (2006) 1245–1252.
[25]	R. S. Vieira, M. M. Beppu, Interaction of natural and crosslinked chitosan membranes with Hg(II) ions, Colloids Surf. A., 279 (2006) 196–207.
[26]	O. A. C., Jr. Monteiro, C. Airoldi, Some studies of crosslinking glutaraldehyde interaction in a homogeneous system, Int. J. Biol. Macromol., 26 (1999) 119–128.
[27]	Z. J. Knaull, S. M. Hudson, A. M. K. Creber, Crosslinking of chitosan fibers with dialdehydes: proposal of a new reaction mechanism, J. Polym. Sci., 37 (1999) 1079–1094.
[28]	N. Bilba, D. Bilba, G. Moroi, Synthesis of a polyacrylamidoxime chelating fiber and its efficiency in the retention of palladium ions, J. Appl. Polym. Sci., 92 (2004) 3730–3735.
[29]	D. A. Fadel, L. A. Shouman, R. M. Afify, Selective transport of chromium (III), cobalt (II), barium (II) and strontium (II) ions through polymer inclusion membranes, Desalination Water Treat., 103 (2018) 163–174.
[30]	F. Eloy, R. Lenaers, The chemistry of amidoximes and related compounds, Chem. Rev., 62 (1962) 155-183.
[31]	I. Langmuir, The adsorption of gases on plane surfaces of glass, mica and platinum, J. Am. Chem. Soc., 40 (1918) 1361–1403.
[32]	T. W. Weber, R. K. Chakravot, Pore and solid diffusion models for fixed bed adsorbents, AIChE J., 20 (1974) 228–238.
[33]	A. Sari, M. Tuzen, D. Citak, M. Soylak, Equilibrium, kinetic and thermodynamic studies of adsorption of Pb(II) from aqueous solution onto Turkish kaolinite clay, J. Hazard. Mater., 149 (2007) 283–291.
[34]	X. S. Wang, J. Huang, H. Q. Hua, J. Wang, Y. Qin, Determination of kinetic and equilibrium parameters of the batch adsorption of Ni(II) from aqueous solutions by Na-mordenite, J. Hazard. Mater, 142 (2007) 468–476.
[35]	H. Freundlich, Adsorption in solution, Phys. Chem. Soc., 40 (1906) 1361–368.
[36]	M. J. Temkin, V. Phyzev, Recent modifications to Langmuir isotherms, ActaPhysiochim. U. S. S. R., 12 (1940) 217–222.
[37]	Y. S. Ho, Citation review of Lagergren kinetic rate equation on adsorption reactions, Scientometrics, 59 (2004) 171–177.
[38]	Y. S. Ho, Review of second-order models for adsorption systems, J. Hazard. Mater., 136 (2006) 681–689.
[39]	W. J. Weber, J. C. Morris, Equilibria and capacities for adsorption on carbon, J. Sanitary Eng. Div., 90 (1964) 79–108.
[40]	C. Sarici-Ozdemir, Y. Onal, Equilibrium, kinetic and thermodynamic adsorptions of the environmental pollutant tannic acid onto activated carbon, Desalination, 251 (2010) 146–152.
[41]	A. Nilchi, R. Saberi, M. Moradi, H. Azizpour, R. Zarghami, Adsorption of cesium on copper hexacyanoferrate–PAN composite ion exchanger from aqueous solution, Chem. Eng. J., 172 (2011) 572–580.
[42]	S. M. El-Bahy, Z. M. El-Bahy, Synthesis and characterization of a new iminodiacetate chelating resin for removal of toxic heavy metal ions from aqueous solution by batch and fixed bed column methods, Korean J. Chem. Eng, 33 (2016) 2492–2501.
[43]	S. M. El-Bahy, Z. M. El-Bahy, Synthesis and characterization of polyamidoxime chelating resin for adsorption of Cu(II), Mn(II) and Ni(II) by batch and column study, J. Environ. Chem. Eng. 4 (2016) 276–286.
[44]	M. Christine, U. F. Sala, U. P. Sala, Quantitative determination of hexavalent chromium in aqueous solutions by UV-Vis spectrophotometer, Cent. Eur. J. Chem., 5 (2007) 1083-1093.
[45]	N. Yahaya, I. Abustan, M. Latiff, O. Solomon Bello and M. A. Ahmad, Fixed-bed column study for Cu (II) removal from aqueous solutions using rice husk based activated carbon, Inter. J. Eng. Technol., 11 (2011) 248-252.
[46]	A. Shahbazi, H. Younesi, A. Badiei, Batch and fixed-bed column adsorption of Cu(II) and CD(II) from aqueous solution onto functionalized SBA-15mesoporoussilica, Can. J. Chem. Eng., 91 (2013) 739–750.
[47]	S. Singha, U. Sarkar, S. Mondal, Transient Behavior of a Packed Column of Eichhornia Crassipes stem for the Removal of Hexavalent Chromium, Desalination, 297 (2012) 48-58.
[48]	Oualid Hamdaoui, Dynamic sorption of methylene blue by cedar sawdust and crushed brick in fixed bed columns, J. Hazard. Mater., 138 (2006) 293-303.
[49]	R. Han, D. Ding, Y. Xu, W. Zou, Y. Wang, Y. Li, L. Zou, Use of rice husk for the adsorption of congo red from aqueous solution in column mode, Bioresour Technol., 99 (2008) 2938-46.
[50]	R. Hana, Y. Wang, X. Zhaoc, Y. Wang, F. Xieb, J. Chengb, Mingsheng, Adsorption of methylene blue by phoenix tree leaf powder in a fixed-bed column: experiments and prediction of breakthrough curves, Desalination, 245 (2009) 284-297.
[51]	M. Calero, F. Hernáinz, G. Blázquez, G. Tenorio, M. A. Martín-Lara, Study of Cr(III) biosorption in a fixed-bed column, J. Hazard. Mater, 171 (2009) 886-893.
[52]	G. S. Bohart, E. Q. Adams, Some aspects of the behavior of charcoal with respect to chlorine, J. Chem. Soc. 42 (1920) 523–544.
[53]	S. Chen, Q. Yue, B. Gao, Q. Li, X. Xu, K. Fu, Adsorption of hexavalent chromium from aqueous solution by modified corn stalk: A fixed-bed column study, Bioresour. Technol. 113 (2012) 114–120.
[54]	H. Patel, R. T. Vashi, Fixed bed column adsorption of ACID Yellow 17 dye onto Tamarind Seed Powder, Can. J. Chem. Eng. 90 (2012) 180–185.
[55]	Thomas, H. C., Heterogeneous ion exchange in a flowing system, J. Am. Chem. Soc., 66 (1944) 1664-1666.
[56]	Yoon, Y. H., J. H. Nelson, Application of gas adsorption kinetics. I. A theoretical model for respirator cartridge service life, Am. Ind. Hyg. Assoc. J., 45 (1984) 509-516.

Cite This Article

Plain Text BibTeX RIS

APA Style

Nada Mohamed Bayomi. (2019). Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx. American Journal of Quantum Chemistry and Molecular Spectroscopy, 3(1), 17-30. https://doi.org/10.11648/j.ajqcms.20190301.14

Copy | Download

ACS Style

Nada Mohamed Bayomi. Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx. Am. J. Quantum Chem. Mol. Spectrosc. 2019, 3(1), 17-30. doi: 10.11648/j.ajqcms.20190301.14

Copy | Download

AMA Style

Nada Mohamed Bayomi. Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx. Am J Quantum Chem Mol Spectrosc. 2019;3(1):17-30. doi: 10.11648/j.ajqcms.20190301.14

Copy | Download

@article{10.11648/j.ajqcms.20190301.14,
  author = {Nada Mohamed Bayomi},
  title = {Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx},
  journal = {American Journal of Quantum Chemistry and Molecular Spectroscopy},
  volume = {3},
  number = {1},
  pages = {17-30},
  doi = {10.11648/j.ajqcms.20190301.14},
  url = {https://doi.org/10.11648/j.ajqcms.20190301.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajqcms.20190301.14},
  abstract = {Modified chitosan was prepared by reaction of cross-linked chitosan beads (CLCB) with acrylonitrile via cyanoethylation reaction of amino group which supports chitosan with nitrile groups, then the resulting cyanoethylated chitosan beads (CECB) were converted to chitosan-amidoxime chelating resin (CACR) via reaction with hydroxylamine hydrochloride. The resulted chelating resin was in the form of beads in order to be easy to capture heavy metals from water. Characterization was made using FTIR Spectroscopy, thermal gravimetric analysis (TGA), differential scanning calorimeter (DSC), BET surface area, and scanning electron microscope (SEM). The adsorption of cobalt and chromium from aqueous solution onto CACR has been investigated as a function of pH, metal ion concentration, contact time, metal ion concentration and temperature. Adsorption experiments indicated that the adsorption capacity was dependent on operating variables which are minimally (47.84, 50.68mg/g) and maximally (600, 147.33 mg/g) for Cr(III) and Co(II) respectively. Results revealed that CACR has high affinity toward Co(II) and Cr(III) ions. The saturated adsorption capacities at 25°C were 147.33 and 600 mg/g resin for Co(II) and Cr(III), respectively. Equilibrium isotherm data were analyzed using Langmuir, Freundlich, and Temkin isotherm models for Co(II) and Cr(III). The adsorption was well fitted by Langmuir isotherm model for Co(II) and Cr(III). The kinetic data indicated that adsorption fitted well with the pseudo-second-order kinetic model for Co(II) and Cr(III). Equilibrium distribution coefficient was obtained at different temperatures Thermodynamic parameters showed that the sorption is endothermic, spontaneous and contributes to increase ∆S of the system. The adsorption performance of CACR toward Co (II) and Cr(III) using fixed bed column method was investigated under different conditions. Mathematical models of Adams–Bohart, Thomas and Yoon–Nelson were applied to the experimental data to analyze the column performance. The results fitted well to the Adams–Bohart, Thomas and Yoon–Nelson models.},
 year = {2019}
}

Copy | Download

TY  - JOUR
T1  - Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx
AU  - Nada Mohamed Bayomi
Y1  - 2019/09/03
PY  - 2019
N1  - https://doi.org/10.11648/j.ajqcms.20190301.14
DO  - 10.11648/j.ajqcms.20190301.14
T2  - American Journal of Quantum Chemistry and Molecular Spectroscopy
JF  - American Journal of Quantum Chemistry and Molecular Spectroscopy
JO  - American Journal of Quantum Chemistry and Molecular Spectroscopy
SP  - 17
EP  - 30
PB  - Science Publishing Group
SN  - 2994-7308
UR  - https://doi.org/10.11648/j.ajqcms.20190301.14
AB  - Modified chitosan was prepared by reaction of cross-linked chitosan beads (CLCB) with acrylonitrile via cyanoethylation reaction of amino group which supports chitosan with nitrile groups, then the resulting cyanoethylated chitosan beads (CECB) were converted to chitosan-amidoxime chelating resin (CACR) via reaction with hydroxylamine hydrochloride. The resulted chelating resin was in the form of beads in order to be easy to capture heavy metals from water. Characterization was made using FTIR Spectroscopy, thermal gravimetric analysis (TGA), differential scanning calorimeter (DSC), BET surface area, and scanning electron microscope (SEM). The adsorption of cobalt and chromium from aqueous solution onto CACR has been investigated as a function of pH, metal ion concentration, contact time, metal ion concentration and temperature. Adsorption experiments indicated that the adsorption capacity was dependent on operating variables which are minimally (47.84, 50.68mg/g) and maximally (600, 147.33 mg/g) for Cr(III) and Co(II) respectively. Results revealed that CACR has high affinity toward Co(II) and Cr(III) ions. The saturated adsorption capacities at 25°C were 147.33 and 600 mg/g resin for Co(II) and Cr(III), respectively. Equilibrium isotherm data were analyzed using Langmuir, Freundlich, and Temkin isotherm models for Co(II) and Cr(III). The adsorption was well fitted by Langmuir isotherm model for Co(II) and Cr(III). The kinetic data indicated that adsorption fitted well with the pseudo-second-order kinetic model for Co(II) and Cr(III). Equilibrium distribution coefficient was obtained at different temperatures Thermodynamic parameters showed that the sorption is endothermic, spontaneous and contributes to increase ∆S of the system. The adsorption performance of CACR toward Co (II) and Cr(III) using fixed bed column method was investigated under different conditions. Mathematical models of Adams–Bohart, Thomas and Yoon–Nelson were applied to the experimental data to analyze the column performance. The results fitted well to the Adams–Bohart, Thomas and Yoon–Nelson models.
VL  - 3
IS  - 1
ER  -

Copy | Download

Author Information

Nada Mohamed Bayomi

Physics and Mathematical Engineering Department, Faculty of Engineering, Egyptian Chinese University, Cairo, Egypt

Download PDF

Sections

Plain Text BibTeX RIS

APA Style

Nada Mohamed Bayomi. (2019). Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx. American Journal of Quantum Chemistry and Molecular Spectroscopy, 3(1), 17-30. https://doi.org/10.11648/j.ajqcms.20190301.14

Copy | Download

ACS Style

Nada Mohamed Bayomi. Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx. Am. J. Quantum Chem. Mol. Spectrosc. 2019, 3(1), 17-30. doi: 10.11648/j.ajqcms.20190301.14

Copy | Download

AMA Style

Nada Mohamed Bayomi. Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx. Am J Quantum Chem Mol Spectrosc. 2019;3(1):17-30. doi: 10.11648/j.ajqcms.20190301.14

Copy | Download

@article{10.11648/j.ajqcms.20190301.14,
  author = {Nada Mohamed Bayomi},
  title = {Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx},
  journal = {American Journal of Quantum Chemistry and Molecular Spectroscopy},
  volume = {3},
  number = {1},
  pages = {17-30},
  doi = {10.11648/j.ajqcms.20190301.14},
  url = {https://doi.org/10.11648/j.ajqcms.20190301.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajqcms.20190301.14},
  abstract = {Modified chitosan was prepared by reaction of cross-linked chitosan beads (CLCB) with acrylonitrile via cyanoethylation reaction of amino group which supports chitosan with nitrile groups, then the resulting cyanoethylated chitosan beads (CECB) were converted to chitosan-amidoxime chelating resin (CACR) via reaction with hydroxylamine hydrochloride. The resulted chelating resin was in the form of beads in order to be easy to capture heavy metals from water. Characterization was made using FTIR Spectroscopy, thermal gravimetric analysis (TGA), differential scanning calorimeter (DSC), BET surface area, and scanning electron microscope (SEM). The adsorption of cobalt and chromium from aqueous solution onto CACR has been investigated as a function of pH, metal ion concentration, contact time, metal ion concentration and temperature. Adsorption experiments indicated that the adsorption capacity was dependent on operating variables which are minimally (47.84, 50.68mg/g) and maximally (600, 147.33 mg/g) for Cr(III) and Co(II) respectively. Results revealed that CACR has high affinity toward Co(II) and Cr(III) ions. The saturated adsorption capacities at 25°C were 147.33 and 600 mg/g resin for Co(II) and Cr(III), respectively. Equilibrium isotherm data were analyzed using Langmuir, Freundlich, and Temkin isotherm models for Co(II) and Cr(III). The adsorption was well fitted by Langmuir isotherm model for Co(II) and Cr(III). The kinetic data indicated that adsorption fitted well with the pseudo-second-order kinetic model for Co(II) and Cr(III). Equilibrium distribution coefficient was obtained at different temperatures Thermodynamic parameters showed that the sorption is endothermic, spontaneous and contributes to increase ∆S of the system. The adsorption performance of CACR toward Co (II) and Cr(III) using fixed bed column method was investigated under different conditions. Mathematical models of Adams–Bohart, Thomas and Yoon–Nelson were applied to the experimental data to analyze the column performance. The results fitted well to the Adams–Bohart, Thomas and Yoon–Nelson models.},
 year = {2019}
}

Copy | Download

TY  - JOUR
T1  - Cross Linking-cyanoethylation for Chitosan Polymer for the Removal of Cr(III) and Co(II) Using Batch and Fixed Bed Column Methodsx
AU  - Nada Mohamed Bayomi
Y1  - 2019/09/03
PY  - 2019
N1  - https://doi.org/10.11648/j.ajqcms.20190301.14
DO  - 10.11648/j.ajqcms.20190301.14
T2  - American Journal of Quantum Chemistry and Molecular Spectroscopy
JF  - American Journal of Quantum Chemistry and Molecular Spectroscopy
JO  - American Journal of Quantum Chemistry and Molecular Spectroscopy
SP  - 17
EP  - 30
PB  - Science Publishing Group
SN  - 2994-7308
UR  - https://doi.org/10.11648/j.ajqcms.20190301.14
AB  - Modified chitosan was prepared by reaction of cross-linked chitosan beads (CLCB) with acrylonitrile via cyanoethylation reaction of amino group which supports chitosan with nitrile groups, then the resulting cyanoethylated chitosan beads (CECB) were converted to chitosan-amidoxime chelating resin (CACR) via reaction with hydroxylamine hydrochloride. The resulted chelating resin was in the form of beads in order to be easy to capture heavy metals from water. Characterization was made using FTIR Spectroscopy, thermal gravimetric analysis (TGA), differential scanning calorimeter (DSC), BET surface area, and scanning electron microscope (SEM). The adsorption of cobalt and chromium from aqueous solution onto CACR has been investigated as a function of pH, metal ion concentration, contact time, metal ion concentration and temperature. Adsorption experiments indicated that the adsorption capacity was dependent on operating variables which are minimally (47.84, 50.68mg/g) and maximally (600, 147.33 mg/g) for Cr(III) and Co(II) respectively. Results revealed that CACR has high affinity toward Co(II) and Cr(III) ions. The saturated adsorption capacities at 25°C were 147.33 and 600 mg/g resin for Co(II) and Cr(III), respectively. Equilibrium isotherm data were analyzed using Langmuir, Freundlich, and Temkin isotherm models for Co(II) and Cr(III). The adsorption was well fitted by Langmuir isotherm model for Co(II) and Cr(III). The kinetic data indicated that adsorption fitted well with the pseudo-second-order kinetic model for Co(II) and Cr(III). Equilibrium distribution coefficient was obtained at different temperatures Thermodynamic parameters showed that the sorption is endothermic, spontaneous and contributes to increase ∆S of the system. The adsorption performance of CACR toward Co (II) and Cr(III) using fixed bed column method was investigated under different conditions. Mathematical models of Adams–Bohart, Thomas and Yoon–Nelson were applied to the experimental data to analyze the column performance. The results fitted well to the Adams–Bohart, Thomas and Yoon–Nelson models.
VL  - 3
IS  - 1
ER  -

Copy | Download