Sodium Nonatitanate for Removal Radioactive Strontium From Aqueous Contaminated Effluent

2011 ◽  
Author(s):  
Aure´lie Merceille ◽  
Agne`s Grandjean ◽  
Yves Barre´
Keyword(s):  
Aqueous Solution ◽  
Sodium Titanate ◽  
Sorption Process ◽  
Synthesis Temperature ◽  
Reaction Model ◽  
Strontium Removal ◽  
Different Temperatures ◽  
Pseudo Second Order ◽  
Materials Used ◽  
Sodium Nonatitanate

Sodium titanate materials which have a layered structure consisting of titanate layers and exchangeable sodium ions are promising inorganic ionic exchangers for strontium adsorption from aqueous solution. The materials used in this study include samples synthesized in a hydrothermal method at different temperatures between 60°C and 200°C. Batch kinetics experiments for strontium removal from aqueous solution were performed. Kinetics data were fitted by using a pseudo second order reaction model and a diffusive model. It was shown that the sorption process occurs in one or two diffusion-controlled steps that depend on the synthesis temperature. The strontium extraction capacity depends on the synthesis temperature with a maximum for sample synthesis at 100°C. This sample has good properties of decontamination at laboratory scale.

Studies on Adsorption of Tyrosine on Multi-Wall Carbon Nanotubes

2011 ◽  
Vol 179-180 ◽  
pp. 1396-1401
Author(s):  
Zhi Biao Feng ◽  
Ren Jiao Han ◽  
Jing Long Wang
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Adsorption Process ◽  
Freundlich Isotherm ◽  
Sorption Process ◽  
Multi Wall Carbon Nanotubes ◽  
Different Temperatures ◽  
Pseudo Second Order ◽  
Rate Controlling Step ◽  
Mechanism Of Sorption

The thermodynamics and kinetics properties and mechanism of sorption process were studied for adsorpting tyrosine in aqueous solution with multi-wall carbon nanotubes (MWCNTs), and the adsorption isotherms at different temperatures were determined. The results showed that the adsorption of the tyrosine in aqueous solution obeys well with the Freundlich isotherm, The thermodynamic parameters indicated that the adsorption reaction was a spontaneous, exothermal and decreasing entropy process,and the adsorption process had an obvious physisorption characteristic.The pseudo-second-order equation provided the best correlation for the adsorption process, being in agreement with adsorption as the rate controlling step.

scholarly journals Biosorption of aniline blue from aqueous solution using a novel biosorbent Zizyphus oenoplia seeds: Modeling studies

2015 ◽  
Vol 17 (3) ◽  
pp. 70-77 ◽  
Author(s):  
M. Kumar ◽  
G. Elangovan ◽  
R. Tamilarasan ◽  
G. Vijayakumar ◽  
P.C. Mukeshkumar ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Low Cost ◽  
Sorption Process ◽  
Aniline Blue ◽  
Blue Dye ◽  
Batch Mode ◽  
Before And After ◽  
Intra Particle Diffusion ◽  
Pseudo Second Order ◽  
Isotherm Equations

Abstract This article presents the feasibility for the removal of Aniline Blue dye (AB dye) from aqueous solution using a low cost biosorbent material Zizyphus oenoplia seeds. In this study, a batch mode experiments of the adsorption process were carried out as a function of pH, contact time, concentration of dye, adsorbent dosage and temperature. The experimental data were fitted with Freundlich and Langmuir isotherm equations. The feasibility of the isotherm was evaluated with dimensionless separation factor (RL). The kinetic data of sorption process are evaluated by using pseudo-first order and pseudo-second order equations. The mode of diffusion process was evaluated with intra-particle diffusion model. The thermodynamic parameters like change in enthalpy (ΔHº); change in entropy (ΔSº) and Gibbs free energy change (ΔGº) were calculated using Van’t Hoff plot. The biosorbent material was characterized with Fourier Transform Infrared (FTIR) spectroscopy and the morphology was identified with Scanning Electron Microscope (SEM) in before and after adsorption of AB dye.

Removal of Pb (II) from Aqueous Solution by Blast-Furnace Slags

2013 ◽  
Vol 726-731 ◽  
pp. 2736-2741
Author(s):  
Ming Da Liu ◽  
Ge Tian ◽  
Liang Jie Zhao ◽  
Yao Sheng Wang ◽  
Lei Guo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Blast Furnace ◽  
Freundlich Isotherm ◽  
Kinetic Studies ◽  
Sorption Process ◽  
Second Order ◽  
Order Model ◽  
Pseudo Second Order ◽  
Solution Kinetic ◽  
Second Order Model

Five blast-furnace slags were used as adsorbents to remove Pb (II) from aqueous solution. Kinetic studies showed that the sorption process was best described by pseudo-second-order model. Among Langmuir, Freundlich and Temkin isotherms, the Freundlich isotherm had a better fit with the simulation of the adsorption of Pb (II).

scholarly journals Isothermal, kinetics and thermodynamics studies of the biosorption of Pb(II) ion from aqueous solution using the scale of croaker fish (Genyonemus lineatus)

2013 ◽  
Vol 3 (3) ◽  
pp. 239-248
Author(s):  
Mojisola O. Nkiko ◽  
Abideen I. Adeogun ◽  
N. A. Adesola Babarinde ◽  
Oluwabunmi J. Sharaibi
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Sorption Process ◽  
Ion Concentration ◽  
Isothermal Kinetics ◽  
Fish Scale ◽  
Biosorption Process ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Biomass Dosage

Biosorbent prepared from the scale of croaker fish (Genyonemus lineatus) has been used for the removal of Pb(II) ion from aqueous solution in a batch system. The effects of some important parameters such as pH, initial metal concentration, temperature and biosorbent dosage on biosorption capacity were investigated. Equilibrium time for the biosorption process is 20 and 30 min at lower and higher concentrations, respectively. The process at 28 °C is in agreement with a pseudo-second-order kinetics model. The equilibrium data obeyed the Langmuir adsorption isotherm with a maximum monolayer adsorption capacity of 14.58 mg g−1. The study showed that the sorption process depends on biomass dosage, temperature, pH and initial metal ion concentration. The calculated thermodynamics parameters (ΔGo, ΔHo and ΔSo) indicated that the biosorption of the metal ion onto fish scale is feasible, spontaneous and exothermic in nature.

Study on Adsorption of Methylene Blue by Sarch-g-Polyacrylamide

2014 ◽  
Vol 881-883 ◽  
pp. 1175-1178
Author(s):  
Xu Man Wang ◽  
Cai Ning Zhang
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Adsorption Isotherm ◽  
Adsorption Process ◽  
Sorption Process ◽  
Kinetics Analysis ◽  
Order Model ◽  
Grafting Polymerization ◽  
Pseudo Second Order ◽  
Mb Adsorption

By means of grafting polymerization, cross-linked starch-g-polyacrylamide (starch-g-PAM) was prepared and used to adsorb methylene blue (MB). Adsorption isotherm and kinetic of the sorption process were studied. The experimental results demonstrated that the prepared starch-g-PAM was an effective adsorbent for removal of MB from aqueous solution. The adsorption of MB by starch-g-PAM was Freundlich type, and the adsorption equation was caculated to be . Furthermore, the adsorption kinetics analysis demonstrated that the adsorption process followed the pseudo-second-order model.

Effect of the synthesis temperature of sodium nonatitanate on batch kinetics of strontium-ion adsorption from aqueous solution

Adsorption ◽  
2011 ◽  
Vol 17 (6) ◽  
pp. 967-975 ◽  
Author(s):  
Aurélie Merceille ◽  
Evelyne Weinzaepfel ◽  
Yves Barré ◽  
Agnès Grandjean
Keyword(s):  
Aqueous Solution ◽  
Synthesis Temperature ◽  
Ion Adsorption ◽  
Batch Kinetics ◽  
Sodium Nonatitanate ◽  
Kinetics Of ◽  
Strontium Ion

scholarly journals Kinetic, equilibrium and thermodynamic studies of Ni(II) ions sorption on sulfuric acid treated Lagenaria vulgaris shell

2016 ◽  
Vol 22 (3) ◽  
pp. 235-247 ◽  
Author(s):  
Danijela Bojic ◽  
Goran Nikolic ◽  
Jelena Mitrovic ◽  
Miljana Radovic ◽  
Milica Petrovic ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sorption Process ◽  
Sorption Kinetics ◽  
Significant Loss ◽  
Isotherm Models ◽  
Pseudo Second Order ◽  
Na Ions ◽  
Ph Range ◽  
Rate Limiting ◽  
Lagenaria Vulgaris

Chemically modified Lagenaria vulgaris shell (ccLVB) was tested as a new sorbent for the removal of Ni(II) from aqueous solution, in batch conditions. The sorption process was very fast reaching equilibrium in about 20 min. Ni(II) sorption is almost invariant in the pH range from 3 to 6. Sorption kinetics followed pseudo-second order, intraparticle diffusion and Chrastil?s models, which suggest that both surface reaction and diffusion were the rate-limiting steps. Equilibria experimental results are well fitted by Langmuir and Temkin sorption isotherm models, indicating mixed adsorption process. The maximum biosorption capacity of ccLVB for Ni(II) was found to be 84.51 mg g-1. The calculated thermodynamic parameters showed that the biosorption of nickel on ccLVB was feasible, spontaneous and exothermic at 25-45?C. The desorption experiments showed that the ccLVB could be reused for five cycles without significant loss in sorption capacity. Release of Na+ ions from the biosorbent during sorption of Ni(II) reveals that the main sorption mechanism is ion exchange. Presented study suggests that ccLVB can be used effectively for the removal of Ni(II) ions from aqueous solution.

scholarly journals Equilibrium and Kinetic Study of Removal Copper(II) from Aqueous Solution Using Chicken Eggshells: Low Cost Sorbent

Molekul ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. 28
Author(s):  
Mohammad Jihad Madiabu ◽  
Joko Untung ◽  
Imas Solihat ◽  
Andi Muhammad Ichzan
Keyword(s):  
Aqueous Solution ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Sorption Process ◽  
X Ray Diffraction ◽  
Order Model ◽  
X Ray ◽  
Adsorption Condition ◽  
Pseudo Second Order ◽  
Effect Of Copper

The research aims to investigate feasibility eggshells as potential adsorbent to remove copper(II) ions from aqueous solution. Eggshells powder was characterized using X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. Effect of copper(II) initial concentration, adsorbent dosage, and contact time have conducted. The optimum adsorption condition obtained when 0.7 g eggshells applied to 50 mg/L copper(II) solution for 50 minutes. The maximum percentage of copper(II) removal was exceeded more than 85%. Langmuir and Freundlich isotherm model were applied to describe the equilibrium adsorption. Copper(II) kinetics sorption process was fitted to pseudo-second order model with a rate constant equal to 0.516 g/mg.min. The results clearly exhibit that eggshells powder can be effectively used to remove copper(II) ions from aqueous solutions.

scholarly journals Adsorption of Methylene Blue from Aqueous Solution by Pumpkin-Seed Residue

2020 ◽  
Vol 42 (1) ◽  
pp. 10-18
Author(s):  
Tae Hyun Gil ◽  
Wang Heon Lee ◽  
Johng-Hwa Ahn
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Adsorption Capacity ◽  
Contact Time ◽  
Sorption Process ◽  
Second Order ◽  
High Concentration ◽  
Pumpkin Seed ◽  
Freundlich Adsorption Isotherm ◽  
Pseudo Second Order

Objective : Present research discussed the utilization of pumpkin-seed residue (PSR) after oil extraction with methanol as an adsorbent for methylene blue (MB) removal from aqueous solution.Method : The experiment was carried out to evaluate the influence of PSR adsorbent dose (7.5-25 g/L), initial MB concentration (25-200 mg/L), contact time (30-120 min), pH (3-11), and temperature (293-333 K). Adsorption isotherms were modeled with the Langmuir, Freundlich, and Temkin isotherms. The kinetic data were analyzed using pseudo-first-order and pseudo-second-order models.Results and Discussion : A pseudo-equilibrium state was reached within 30 min of contact time at low initial MB concentration (25-50 mg/L) and 90 min at high concentration (100-200 mg/L). Increasing pH and temperature caused an increase in adsorption capacity. Thermodynamic studies demonstrated that the adsorption process was spontaneous with Gibb’s free-energy values ranging between -15.78 to -13.87 kJ/mol and endothermic with an enthalpy value of 0.011 kJ/mol. The adsorption equilibrium data fitted well with the Freundlich adsorption isotherm. The maximum monolayer adsorption capacity was 20.33 mg/g. Tempkin isotherm model clarified that the heat of sorption process was 6.28 J/mol. The adsorption kinetics was found to follow the pseudo-second order kinetics model and its rate constant was 0.002-0.278 g/mg･min.Conclusions : Findings of the present study indicated that the PSR can be successfully used for removal of MB from aqueous solution. Therefore, the PSR was shown to have good potential as a biosorbent for MB removal.

scholarly journals Removal of brilliant green (BG) from aqueous solution by using low cost biomass Salix alba leaves (SAL): thermodynamic and kinetic studies

2020 ◽  
Vol 10 (1) ◽  
pp. 70-81
Author(s):  
Rashida Fiaz ◽  
Muhammad Hafeez ◽  
Rashid Mahmood
Keyword(s):  
Aqueous Solution ◽  
Brilliant Green ◽  
Low Cost ◽  
Kinetic Studies ◽  
Sorption Process ◽  
Salix Alba ◽  
Batch Studies ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Maximum Removal

Abstract The removal of brilliant green dye (BGD) from aqueous solution by using Salix alba leaves (SAL) was carried out via batch studies. The maximum removal efficiency was found to be 95.2% with initial dye concentration 50 mg/L at 0.15 g adsorbent dosage, pH = 6, and 298 K temperature, and the equilibrium was observed within 3½ hours. The adsorption capacity increased (2.21–15.89 mg/g) from 10 to 50 mg/L of dye concentration. Kinetic and isotherm studies were also carried out. The results showed that pseudo-second order model better describes the adsorption mechanism. The isotherm equilibrium data analysis was carried out by using Freundlich and Langmuir models and the sorption process was observed to conform with the Langmuir isotherm with linear correlation coefficient (R2 = 0.99). The thermodynamic properties ΔG°, ΔH°, and ΔS° delineated that BGD adsorption over SAL was feasible, spontaneous, and endothermic between 303 and 323 K temperature.

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