Effect of morphology on adsorption kinetics of magnesium oxide for the removal of methyl orange

The MnO2-modified diatomite was obtained by wet chemical methods. The specific structure of the material has been determined by modern physicochemical methods. The results showed that the surface of diatomite was coated by the manganese oxide nanoparticles. The prepared MnO2-diatomite material is a good adsorbent for the removal methyl orange (MO) in water. The adsorption kinetics of MO on modulation materials are consistent with the pseudo-second-order kinetics model. Therefore, MnO2-modified diatomite materials could be promising sorbents for removing MO.

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Adsorption Kinetics and Thermodynamics of Methyl Orange on Ethylenediamine-Modified Chitosan Magnetic Nano-Adsorbent

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.581-582.273 ◽

2012 ◽

Vol 581-582 ◽

pp. 273-276 ◽

Cited By ~ 1

Author(s):

Yu Hong Chen ◽

Si Qian Hu

Keyword(s):

Activation Energy ◽

Methyl Orange ◽

Adsorption Kinetics ◽

Freundlich Isotherm ◽

Sorption Process ◽

Kinetics And Thermodynamics ◽

Modified Chitosan ◽

Pseudo Second Order ◽

Kinetics Of ◽

Nano Adsorbent

Ethylenediamine-modified chitosan magnetic nano-adsorbent (EMCN) was prepared and used for the sorption of methyl orange(MO). The kinetics of the sorption fitted well with the pseudo-second-order kinetics model. The activation energy of sorption (Ea) was determined to be 16.47 kJ.mol-1. Adsorption isotherms showed that the sorption process was consistent with both Langmuir and Freundlich isotherm, and the thermodynamic parameters were calculated and indicated that the sorption process was spontaneous and exothermic. The saturated sorption capacity is 247.66, 227.58, 214.19 mg.g-1 at 5°C, 25°C, 45°C(pH=5.6),respectively.

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Adsorption kinetics of nonanediol and nonane dicarbonic acid at the air/water interface

Journal de Chimie Physique ◽

10.1051/jcp/1982790387 ◽

1982 ◽

Vol 79 ◽

pp. 387-393 ◽

Cited By ~ 25

Author(s):

P. Joos ◽

G. Bleys ◽

G. Petre

Keyword(s):

Adsorption Kinetics ◽

Water Interface ◽

Air Water Interface ◽

Kinetics Of ◽

Dicarbonic Acid

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Kinetic of oxidation of methyl orange by vanadium(V) under conditions VO2+ and decavanadates coexist: Catalysis by Triton X-100 micellar medium

10.31221/osf.io/m9g7p ◽

2019 ◽

Author(s):

Chem Int

Keyword(s):

Methyl Orange ◽

Solution Ph ◽

Vanadium Concentration ◽

Limiting Behavior ◽

First Order ◽

First Order Kinetics ◽

Ph Range ◽

Kinetic Pattern ◽

Triton X ◽

Kinetics Of

The kinetics of oxidation of methyl orange by vanadium(V) {V(V)} has been investigated in the pH range 2.3-3.79. In this pH range V(V) exists both in the form of decavanadates and VO2+. The kinetic results are distinctly different from the results obtained for the same reaction in highly acidic solution (pH < 1) where V(V) exists only in the form of VO2+. The reaction obeys first order kinetics with respect to methyl orange but the rate has very little dependence on total vanadium concentration. The reaction is accelerated by H+ ion but the dependence of rate on [H+] is less than that corresponding to first order dependence. The equilibrium between decavanadates and VO2+ explains the different kinetic pattern observed in this pH range. The reaction is markedly accelerated by Triton X-100 micelles. The rate-[surfactant] profile shows a limiting behavior indicative of a unimolecular pathway in the micellar pseudophase.

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Adsorption Kinetics of Diblock Copolymers from a Micellar Solution on Silica and Titania

Macromolecules ◽

10.1021/ma971793l ◽

1998 ◽

Vol 31 (26) ◽

pp. 9281-9294 ◽

Cited By ~ 26

Author(s):

H. D. Bijsterbosch ◽

M. A. Cohen Stuart ◽

G. J. Fleer

Keyword(s):

Adsorption Kinetics ◽

Micellar Solution ◽

Diblock Copolymers ◽

Kinetics Of ◽

Silica And Titania

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Comparative investigation on the removal of methyl orange from aqueous solution using three different advanced oxidation processes

International Journal of Chemical Reactor Engineering ◽

10.1515/ijcre-2020-0243 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Zahia Benredjem ◽

Karima Barbari ◽

Imene Chaabna ◽

Samia Saaidia ◽

Abdelhak Djemel ◽

...

Keyword(s):

Methyl Orange ◽

Current Density ◽

Advanced Oxidation Processes ◽

Degradation Rate ◽

Supporting Electrolyte ◽

Advanced Oxidation ◽

Comparative Investigation ◽

Oxidation Processes ◽

The Comparative Study ◽

Kinetics Of

Abstract The Advanced Oxidation Processes (AOPs) are promising environmentally friendly technologies for the treatment of wastewater containing organic pollutants in general and particularly dyes. The aim of this work is to determine which of the AOP processes based on the Fenton reaction is more effective in degrading the methyl orange (MO) dye. The comparative study of the Fenton, photo-Fenton (PF) and electro-Fenton (EF) processes has shown that electro-Fenton is the most efficient method for oxidizing Methyl Orange. The evolution of organic matter degradation was followed by absorbance (discoloration) and COD (mineralization) measurements. The kinetics of the MO degradation by the electro-Fenton process is very rapid and the OM degradation rate reached 90.87% after 5 min. The influence of some parameters such as the concentration of the catalyst (Fe (II)), the concentration of MO, the current density, the nature and the concentration of supporting electrolyte was investigated. The results showed that the degradation rate increases with the increase in the applied current density and the concentration of the supporting electrolyte. The study of the concentration effect on the rate degradation revealed optimal values for the concentrations 2.10−5 M and 75 mg L−1 of Fe (II) and MO respectively.

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