Batch study and kinetics of hexavalent chromium removal from aqueous solutions by anion exchange resin (Dowex 21 KCl)

2013 ◽  
Vol 51 (10-12) ◽  
pp. 2116-2120 ◽  
Author(s):  
Hamdi Mihçiokur ◽  
İbrahim Peker
Keyword(s):  
Aqueous Solutions ◽  
Anion Exchange ◽  
Hexavalent Chromium ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Chromium Removal ◽  
Batch Study ◽  
Kinetics Of

scholarly journals Removal of Hexavalent Chromium Ions from Aqueous Solutions by an Anion-Exchange Resin

2008 ◽  
Vol 26 (9) ◽  
pp. 693-703 ◽  
Author(s):  
P. Senthil Kumar ◽  
K. Kirthika ◽  
K. Sathish Kumar
Keyword(s):  
Aqueous Solutions ◽  
Anion Exchange ◽  
Hexavalent Chromium ◽  
Exchange Resin ◽  
Ph Value ◽  
Anion Exchange Resin ◽  
Freundlich Isotherm ◽  
Sorption Process ◽  
Isotherm Models ◽  
Exchange Resins

The removal of hexavalent chromium, Cr(VI), from aqueous solutions under different conditions using an anion-exchange resin (AXR) as an adsorbent was investigated under batch conditions. Such studies indicated that the percentage adsorption decreased with increasing initial Cr(VI) concentration, with the maximum removal of such ions occurred at a pH value of ca. 2.0. Both the Langmuir and Freundlich isotherm models were capable of reproducing the isotherms obtained experimentally. The sorption process was rapid during the first 20 min with equilibrium being attained within 30 min. The process followed first-order kinetics. The results demonstrate that such anion-exchange resins can be used for the efficient removal of Cr(VI) ions from water and wastewater.

scholarly journals Kinetics of thermal destruction of highly porous anion-exchange resin TOKEM-320Y

2020 ◽  
Vol 1611 ◽  
pp. 012041
Author(s):  
S A Kuznetsova ◽  
O S Khalipova ◽  
K V Lisitsa ◽  
A A Ditts ◽  
A G Malchik ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Thermal Destruction ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Kinetics Of ◽  
Highly Porous

Kinetics of gold loading from bromide solution onto an anion exchange resin

1994 ◽  
Vol 7 (7) ◽  
pp. 865-887 ◽  
Author(s):  
R.K. Mensah-Biney ◽  
K.J. Reid ◽  
M.T. Hepworth
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Bromide Solution ◽  
Kinetics Of

Chelating Agent EDDS in Removal of Copper (II) with Three Adsorption Materials

2013 ◽  
Vol 663 ◽  
pp. 1005-1010
Author(s):  
Jian Zhong Zhu ◽  
Sheng Lu Chen ◽  
Rui Rui Zhu ◽  
Guan Huan Chen ◽  
Yang Cao
Keyword(s):  
Activated Carbon ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Correlation Coefficients ◽  
Chelating Agent ◽  
Experimental Systems ◽  
Basic Anion Exchange Resin ◽  
Basic Anion ◽  
Kinetics Of

Recently, chelating agents have been widely applied to remove heavy metals for their highly effective capacities. In this study, three kinds of adsorption materials, 719 strongly basic anion exchange resin, γ-Al2O3 and activated carbon, were investigated to remove copper(II) under the existence of chelating agent EDDS. Adsorption isotherm and kinetics of copper(II) were assessed in batch experimental systems, pH and initial concentrations were also conducted to evaluate the effects on copper(II) removal. Results indicated the adsorption capacity with three absorbents was enhanced from 0.62, 7.26, 6.73 mg/g to 17.21, 24.68, 24.90 mg/g respectively when the chelating agent EDDS existing in aquatic phase. The experimental isotherms are fitted to Langmuir and Freundlich models, results show that 719 strongly basic anion exchange resin and γ-Al2O3 have good correlation coefficients obtained from Langmuir model, and activated carbon is better to fit the Freundlich model.

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