Chromium VI and cadmium II removal from aqueous solutions by olive stones

2010 ◽  
Vol 16 (1-3) ◽  
pp. 393-401 ◽  
Author(s):  
K. Rouibah ◽  
A.-H. Meniai ◽  
L. Deffous ◽  
M. Bencheikh Lehocine
Keyword(s):  
Aqueous Solutions ◽  
Chromium Vi ◽  
Olive Stones

Elimination of Chromium (VI) and Cadmium(II) from Aqueous Solutions by Adsorption onto Olive Stones

2009 ◽  
Vol 3 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Karima Rouibah ◽  
Abdeslam-Hassen Meniai ◽  
Mohamed Tahar Rouibah ◽  
Lazhar Deffous ◽  
Mossaab Bencheikh Lehocine
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Process ◽  
Agitation Speed ◽  
Optimal Conditions ◽  
Chemical Parameters ◽  
Liquid Ratio ◽  
Chromium Vi ◽  
Olive Stones ◽  
Physico Chemical ◽  
Pseudo Second Order

The present study concerns the test of olive stones as an adsorbent for removing Cd(II) and Cr(VI) from aqueous solutions. The experimental elimination of the two cations was carried out batchwise and the influence of certain physico-chemical parameters such as the contact time, the pH of the solution, the temperature, the solid to liquid ratio, the agitation speed were also considered. The equilibrium adsorption capacity of the olive stones for the case of Cr(VI) followed the Langmuir model, whereas for the Cd(II) cations, the two models i.e. Langmuir and Freundlich were equally representative. The adsorption process was found to be of pseudo second order and the rate constants were determined for both cations. The Gibbs free energy sign was negative for the adsorption of both cations, indicating that the process was spontaneous. Finally the olive stones retained chromium more than cadmium, but at optimal conditions, high removal percentages were reached, for both cations.

scholarly journals Amberlite IRC-718 ion chelating resin extraction of hazardous metal Cr (VI) from aqueous solutions: equilibrium and theoretical modeling

2021 ◽  
Author(s):  
Abdelhamid Addala ◽  
Moussa Boudiaf ◽  
Maria Elektorowicz ◽  
Embarek Bentouhami ◽  
Yacine Bengeurba
Keyword(s):  
Ion Exchange ◽  
Aqueous Solutions ◽  
Exchange Process ◽  
Ion Exchange Resin ◽  
Exchange Capacity ◽  
Chelating Resin ◽  
Exchange Potential ◽  
Chromium Vi ◽  
Ion Exchange Process ◽  
Hazardous Metal

Abstract Under varied conditions, the IRC 718 ion-exchange resin is used to extract chromium (VI) ions from aqueous solutions. On chromium (VI) removal effectiveness, the effects of adsorption dosage, contact time, beginning metal concentration, and pH were examined. The batch ion exchange process reached equilibrium after around 90 minutes of interaction. With an initial chromium (VI) concentration of 0.5 mg/dm3, the pH-dependent ion-exchange mechanism revealed maximal removal in the pH 2.0–10 range . The adsorption mechanism occurs between Cr(VI) determined as the electron acceptor, and IRC 718 determined as the electron donor. The equilibrium ion-exchange potential and ion transfer quantities for Amberlite IRC 718 were calculated using the Langmuir adsorption isotherm model. The overall ion exchange capacity of the resin was determined to be 187.72 mg of chromium (VI)/g of resin at an ideal pH of 6.0.

scholarly journals Biosorption of Chromium (VI) from Aqueous Solutions onto Fungal Biomass

2004 ◽  
Vol 2 (1-2) ◽  
pp. 1-7 ◽  
Author(s):  
Ismael Acosta R. ◽  
Xöchitl Rodríguez ◽  
Conrado Gutiérrez ◽  
Ma. de Guadalupe Moctezuma
Keyword(s):  
Aqueous Solutions ◽  
Fungal Biomass ◽  
Chromium Vi

Experimental analysis, modeling and optimization of chromium (VI) removal from aqueous solutions by polymer-enhanced ultrafiltration

2014 ◽  
Vol 456 ◽  
pp. 139-154 ◽  
Author(s):  
S. Chakraborty ◽  
J. Dasgupta ◽  
U. Farooq ◽  
J. Sikder ◽  
E. Drioli ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Experimental Analysis ◽  
Modeling And Optimization ◽  
Chromium Vi

Carbon-coated montmorillonite nanocomposite for the removal of chromium(VI) from aqueous solutions

2019 ◽  
Vol 368 ◽  
pp. 541-549 ◽  
Author(s):  
Jing Wei ◽  
Chen Tu ◽  
Guodong Yuan ◽  
Dongxue Bi ◽  
Liang Xiao ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Chromium Vi ◽  
Carbon Coated

scholarly journals Bisorption of chromium(VI) from aqueous solutions bySargassum thunbergiiKuntze

2014 ◽  
Vol 28 (2) ◽  
pp. 259-265 ◽  
Author(s):  
Yun Wang ◽  
Yingxia Li ◽  
Feng Juan Zhao
Keyword(s):  
Aqueous Solutions ◽  
Chromium Vi
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