A Pseudo-Second Order Kinetic Equation for Sorption Processes

2020 ◽  
Vol 94 (1) ◽  
pp. 171-176 ◽  
Author(s):  
R. Kh. Khamizov
Keyword(s):  
Kinetic Equation ◽  
Second Order ◽  
Order Kinetic ◽  
Pseudo Second Order ◽  
Order Kinetic Equation

scholarly journals Experimental study of the adsorption of Zn2 + ions on Natural Calcium Carbonate

2019 ◽  
Vol 9 (1) ◽  
pp. 78-84
Author(s):  
Karima Abellaoui ◽  
Hassan EL Kafssaoui ◽  
Hakima Nassali ◽  
Otheman Amrhar ◽  
Mohammed S. Elyoubi ◽  
...  
Keyword(s):  
Kinetic Equation ◽  
Calcium Carbonate ◽  
Freundlich Isotherm ◽  
Second Order ◽  
Adsorption Kinetic ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Solution Ph ◽  
Order Kinetic Equation

In this study, Natural Calcium Carbonate (NCC) that was characterised by X-ray diffraction has been used as an adsorbent in the removal of Zn2+, from aqueous solution by a batch adsorption technique. The effects of various experimental parameters such as solution PH, initial concentration of solution, contact time, adsorbent masses and stirring speed were investigated. The results showed that basic PH and the average stirring speed were favourable for the adsorption of Zn2+, and the adequate equilibrium time for the adsorption of Zn2+ onto Natural Calcium Carbonate was 80min. The experimental data were analysed by the linear form of Langmuir, Freundlich. Isotherm models and showed a good fit with the Langmuir isotherm model. Adsorption kinetic was studied using pseudo first order kinetic equation, second order kinetic equation. The adsorption kinetic followed the pseudo second order equation. 

Adsorption Kinetics of Direct Red 4BS Using Stove Ash

2013 ◽  
Vol 726-731 ◽  
pp. 2833-2836
Author(s):  
Bo Yu ◽  
Wei Ming Wang ◽  
Di Ma ◽  
Zai Sheng Cai
Keyword(s):  
Kinetic Equation ◽  
Kinetic Parameters ◽  
Adsorption Kinetics ◽  
Waste Material ◽  
Order Kinetic ◽  
Initial Concentration ◽  
Adsorption Reaction ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Order Kinetic Equation

A waste material, stove ash, was applied to adsorbthe Direct Red 4BS. The dye amount absorbed by ash was improved with increasingthe dye initial concentration from 3g/Lto 7g/L. Dye was adsorbed within 2minutes and the equilibrium was achieved after 5 minutes. The kinetic of adsorptionreaction was also studied. The results showed that adsorption reaction was congruentwith Lagergren pseudo-second order kinetic equation, and different initial dyeconcentrations had their specific kinetic parameters.

Sorption interactions in system «hydroxyapatite—aqueous solution of CuSO4»

2021 ◽  
pp. 13-20
Author(s):  
T.V. Smotrina ◽  
◽  
O.V. Stoyanov ◽  
Keyword(s):  
Aqueous Solution ◽  
Kinetic Equation ◽  
Chemical Interaction ◽  
Nmr Relaxation ◽  
Diffusion Region ◽  
Order Kinetic ◽  
Pseudo Second Order ◽  
Synthetic Hydroxyapatite ◽  
Process Speed ◽  
Order Kinetic Equation

Regularities of adsorption of copper (II) ions by synthetic hydroxyapatite have been examined. It is shown that sorption of metal ions occurs mainly in the mixed diffusion region, the chemical interaction described by the pseudo-second order kinetic equation has a significant effect on the process speed. It was found out that that the adsorption isotherm was described by the Langmuir monomolecular adsorption equation in the best way. Interaction specificity of hydroxyapatite with water was studied by NMR relaxation spectroscopy method

The Drug Loading Kinetics Mechanism of Ion Exchange Fiber as a Novel Kind of Drug Carrier Material

2014 ◽  
Vol 904 ◽  
pp. 54-58
Author(s):  
Hui Min Yao ◽  
Jun Yi Zhu ◽  
Guang Qing Xia
Keyword(s):  
Ion Exchange ◽  
Drug Carrier ◽  
Drug Loading ◽  
Drug Carriers ◽  
Second Order ◽  
Order Kinetic ◽  
Pseudo Second Order ◽  
Kinetic Sorption ◽  
Ion Exchange Fiber ◽  
Order Kinetic Equation

The adsorption of Fenazoxine hydrochloride was investigated by performing batch kinetic sorption experiments. Experiments were carried out as function of contact time, initial concentration. Adsorption data were modeled using the pseudo-first-order and pseudo-second-order kinetics equations. It showed that the pseudo-second order kinetic equation can describe the adsorption kinetics best. The results indicate that ion-exchange fiber is suitable as drug carriers for loading drugs.

Synthesis and Characterization of Chitosan templated Mesoporous Silica: Efficient use of Mesoporous Silica in the removal of Cu(II) from Aqueous Solutions

2016 ◽  
Vol 4 (2) ◽  
pp. 105-112
Author(s):  
Lalchhing puii ◽  
◽  
Seung-Mok Lee ◽  
Diwakar Tiwari ◽  
◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Aqueous Solutions ◽  
Background Electrolyte ◽  
Second Order ◽  
Order Kinetic ◽  
Sorption Data ◽  
Column Reactor ◽  
Wide Ph Range ◽  
Freundlich Adsorption Isotherm ◽  
Pseudo Second Order

A mesoporous silica was synthesized by annealing (3-Aminopropyl) triethoxysilane grafted chitosan at 800˚C. The mesoporous silica was characterized by the XRD (X-ray diffraction) analysis. The BET specific surface area and pore size of silica was found to be 178.42 m2/g and 4.13 nm. The mesoporous silica was then employed for the efficient remediation of aqueous solutions contaminated with Cu(II) under batch and column reactor operations. The mesoporous silica showed extremely high per cent removal of Cu(II) at wide pH range i.e., pH ~2.0 to 7.0. Relatively a fast uptake of Cu(II) was occurred and high percentage removal was obtained at initial concentrations studied from 1.0 to 15.0 mg/L. The equilibrium state sorption data were utilized for the Langmuir and Freundlich adsorption isotherm studies. Moreover, the effect of an increase in background electrolyte concentrations from 0.0001 to 0.1 mol/L NaNO3 was assessed for the uptake of Cu(II) by mesoporous silica. The equilibrium sorption was achieved within 240 min of contact and the kinetic data is best fitted to the pseudo-second-order and fractal like pseudo-second-order kinetic models. In addition, the mesoporous silica was used for dynamic studies under column reactor operations. The breakthrough curve was then used for the non-linear fitting of the Thomas equation and the loading capacity of the column for Cu(II) was estimated.

Preparation and Aplication of Cation Adsorbent by Canada Goldenrod (Solidago canadensis L.)

2011 ◽  
Vol 396-398 ◽  
pp. 75-87
Author(s):  
Zai Fu Yang ◽  
Xiao Jing Yang ◽  
Li Hong Sun ◽  
Lian Lian Xu
Keyword(s):  
Sulfuric Acid ◽  
Cation Exchange ◽  
Agricultural Land ◽  
Reaction Medium ◽  
Volume Ratio ◽  
Second Order ◽  
Experimental Results ◽  
Solidago Canadensis ◽  
Order Kinetic ◽  
Pseudo Second Order

ABSTRACT: Cation adsorbent was prepared from the Solidago Canadensis（which are abandoned agricultural land of alien invasive plants）by Sulfuric acid esterification modified , isoamyl alcohol as reaction medium. Design L934 orthogonal experiment, the Solidago canadensis cation exchange adsorbent, the optimal preparation conditions. Experimental results show that at 15°C, concentrated sulfuric acid and amyl alcohol volume ratio of 5:6 obtained under conditions of Solidago canadensis cation exchange adsorbent for Pb(II) exchange best. The experimental results of Pb(II) adsorption onto the Solidago Canadensis based cation adsorbent showed that the best conditions are: the initial pH 5, the concentration of Pb(II) 300mg/L，the dosage of cation adsorbent 1.2mg/L and adsorption time 3h. The adsorption data were analyzed by using pseudo-first-order and pseudo-second-order kinetic models were found to follow the pseudo-second-order kinetic model.

Studies of Chromium Removal from Tannery Effluents by Dead Streptomyces Rimosus

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Mohamed Nasser Sahmoune ◽  
Krim Louhab ◽  
Aissa Boukhiar
Keyword(s):  
Fractional Power ◽  
Kinetic Studies ◽  
Second Order ◽  
Order Kinetic ◽  
Streptomyces Rimosus ◽  
Tannery Effluents ◽  
Equilibrium Data ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Ph Range

Dead streptomyces rimosus was found to be an effective biosorbent for the removal of chromium from industrial tanning effluents. A sorption level of 65 mg/g was observed at pH 4.8 while the precipitation effect augmented this value at a higher pH range. Chromium desorption increased with decreasing desorption agents pH (including HCl and H2SO4) to a maximum value of 95% at approximately zero pH. The biosorption data of trivalent chromium by streptomyces rimosus has been used for kinetic studies based on fractional power, Elovich, pseudo-first order and pseudo-second order rate expressions. The time-dependent Cr (III) biosorption data were well-described by a pseudo-second-order kinetic model. The intraparticle diffusion is not the rate-limiting step for the whole reaction. It was found that the biosorption equilibrium data fit well with the Langmuir model.

The Study on Formaldehyde Emission of Composite Floor and Activated Carbon Adsorption on Formaldehyde

2011 ◽  
Vol 243-249 ◽  
pp. 4956-4959
Author(s):  
Jian Chao Hao ◽  
Hui Fen Liu ◽  
Dong Ling Wei ◽  
Li Jun Shi ◽  
Jun Li Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Kinetic Equation ◽  
Formaldehyde Emission ◽  
Order Kinetic ◽  
Activated Carbon Adsorption ◽  
High Quality ◽  
Carbon Adsorption ◽  
Airtight Chamber ◽  
The Relationship ◽  
Order Kinetic Equation

The relationship between formaldehyde emission and time was researched and a mathematical model was developed which describes the variation of formaldehyde with time in the airtight chamber. It was found that high quality composite floor was in line with 0-order kinetic equation and low quality composite floor was in line with 1-order kinetic equation. Besides, the effect of activated carbon adsorption on formaldehyde was studied and the result showed that activated carbon had poor adsorption on formaldehyde for weak van der waals force.

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