Diffusion Kinetic Modeling of Fluoride Removal from Aqueous Solution by Charge-Reversed Zeolite Particles

2005 ◽  
Vol 38 (9) ◽  
pp. 701-710 ◽  
Author(s):  
Maurice S. Onyango ◽  
Yoshihiro Kojima ◽  
Dalibor Kuchar ◽  
Simon O. Osembo ◽  
Hitoki Matsuda
Keyword(s):  
Aqueous Solution ◽  
Kinetic Modeling ◽  
Fluoride Removal ◽  
Diffusion Kinetic

scholarly journals Eggshell Powder as an Adsorbent for Removal of Fluoride from Aqueous Solution: Equilibrium, Kinetic and Thermodynamic Studies

2012 ◽  
Vol 9 (3) ◽  
pp. 1457-1480 ◽  
Author(s):  
R. Bhaumik ◽  
N. K. Mondal ◽  
B. Das ◽  
P. Roy ◽  
K. C. Pal ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Adsorption Process ◽  
Low Cost ◽  
Fluoride Removal ◽  
Contaminated Water ◽  
Fluoride Adsorption ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Kinetic And Thermodynamic Studies ◽  
Maximum Removal

A new medium, eggshell powder has been developed for fluoride removal from aqueous solution. Fluoride adsorption was studied in a batch system where adsorption was found to be pH dependent with maximum removal efficiency at 6.0. The experimental data was more satisfactorily fitted with Langmuir isotherm model. The kinetics and the factor controlling adsorption process fully accepted by pseudo-second-order model were also discussed. Eawas found to be 45.98 kJmol-1by using Arrhenius equation, indicating chemisorption nature of fluoride onto eggshell powder. Thermodynamic study showed spontaneous nature and feasibility of the adsorption process with negative enthalpy (∆H0) value also supported the exothermic nature. Batch experiments were performed to study the applicability of the adsorbent by using fluoride contaminated water collected from affected areas. These results indicate that eggshell powder can be used as an effective, low-cost adsorbent to remove fluoride from aqueous solution as well as groundwater.

Facile Fabrication of Biochar/Al2O3 Adsorbent and Its Application for Fluoride Removal from Aqueous Solution

2018 ◽  
Vol 64 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Xiancai Jiang ◽  
Xiaotong Xiang ◽  
Haifeng Hu ◽  
Xiangchao Meng ◽  
Linxi Hou
Keyword(s):  
Aqueous Solution ◽  
Fluoride Removal ◽  
Facile Fabrication

UV/H2O2 treatment of Rhodamine B in aqueous solution: Influence of operational parameters and kinetic modeling

Desalination ◽  
2008 ◽  
Vol 230 (1-3) ◽  
pp. 16-26 ◽  
Author(s):  
N. Daneshvar ◽  
M.A. Behnajady ◽  
M. Khayyat Ali Mohammadi ◽  
M.S. Seyed Dorraji
Keyword(s):  
Aqueous Solution ◽  
Kinetic Modeling ◽  
Rhodamine B ◽  
Operational Parameters ◽  
H2o2 Treatment

Fluoride removal efficiency from aqueous solution by synthetic iron(III)–aluminum(III)–chromium(III) ternary mixed oxide

Desalination ◽  
2010 ◽  
Vol 255 (1-3) ◽  
pp. 44-51 ◽  
Author(s):  
Krishna Biswas ◽  
Kaushik Gupta ◽  
Arijit Goswami ◽  
Uday Chand Ghosh
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Mixed Oxide ◽  
Fluoride Removal ◽  
Ternary Mixed Oxide

Biosorption of hexavalent chromium from aqueous solution onto pomegranate seeds: kinetic modeling studies

2017 ◽  
Vol 14 (2) ◽  
pp. 331-340 ◽  
Author(s):  
M. T. Ghaneian ◽  
A. Bhatnagar ◽  
M. H. Ehrampoush ◽  
M. Amrollahi ◽  
B. Jamshidi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Kinetic Modeling ◽  
Modeling Studies ◽  
Pomegranate Seeds

scholarly journals Study about Doping Ion La3+ onto Surface of Pyrolusite Ore for Removing Simultaneously Both Fluoride and Phosphate from Wastewater

2017 ◽  
Vol 2017 ◽  
pp. 1-11
Author(s):  
Nguyen Thi Hue ◽  
Nguyen Hoang Tung
Keyword(s):  
Aqueous Solution ◽  
Kinetic Studies ◽  
Phosphate Adsorption ◽  
Fluoride Removal ◽  
Fluoride Adsorption ◽  
Pseudo Second Order ◽  
Xrd Techniques ◽  
Adsorbent Characterization ◽  
Coexisting Ions

Lanthanum has been doped onto the surface of the natural Pyrolusite for simultaneous removal of phosphate and fluoride in aqueous solution. The adsorbent characterization of the materials was observed by the SEM, BET, and XRD techniques. The dynamics and isotherms models of fluoride and phosphate adsorption, with respect to pH, pHPZC, adsorbent dose, and effect of coexisting ions, were studied. The results showed that lanthanum doped Pyrolusite ore (LDPO) relatively highly adsorbed amount of phosphate and fluoride from aqueous solution. Phosphate and fluoride removal efficiencies of LDPO are approximately 97% and 95%, respectively. Pseudo-first order for kinetic studies of phosphate and fluoride removal of the LDPO was observed with high correlations for fluoride but weak correlations for phosphate. However, pseudo-second order for kinetic studies was high correlation for both phosphate and fluoride. The phosphate and fluoride adsorption capacities of the LDPO significantly decreased with the existence of coions (sulfate, chloride, and nitrate) in the aqueous solution.

Equilibrium and kinetic modeling of acid dye removal from aqueous solution by polymer inclusion membrane (PIMs)

2014 ◽  
Vol 57 (8) ◽  
pp. 3708-3719 ◽  
Author(s):  
Aitali Salima ◽  
Kebiche-Senhadji Ounissa ◽  
Hammache Fadila ◽  
Benamor Mohamed
Keyword(s):  
Aqueous Solution ◽  
Kinetic Modeling ◽  
Dye Removal ◽  
Acid Dye ◽  
Inclusion Membrane ◽  
Polymer Inclusion Membrane
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