Adsorption of Methyl Red from Aqueous Solutions by Algerian Bentonite Clay

2015 ◽  
pp. 203-209 ◽  
Author(s):  
Karima Boudouara ◽  
Madani Ghelamallah ◽  
Halima Nadia Khemliche
Keyword(s):  
Aqueous Solutions ◽  
Bentonite Clay ◽  
Methyl Red

scholarly journals Application of activated bentonite for the removal of direct and reactive dye from aqueous solutions

2019 ◽  
Vol 25 (4) ◽  
pp. 341-351
Author(s):  
Aleksandar Zdravkovic ◽  
Novica Stankovic ◽  
Nebojsa Ristic ◽  
Goran Petkovic
Keyword(s):  
Aqueous Solutions ◽  
Dye Adsorption ◽  
Bentonite Clay ◽  
Reactive Dye ◽  
Second Order ◽  
Intra Particle Diffusion ◽  
Naoh Solution ◽  
Activated Bentonite ◽  
Endothermic Process ◽  
Pseudo Second Order

The aim of this study was to determine adsorptive properties of acid activated bentonite clay for the removal of Direct Red 173 (DR 173) and Reactive Red 22 (RR 22) dyes from aqueous solutions. Raw and modified clay were characterized by the following methods: Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRPD), and scanning electron microscopy (SEM). The efficiency of activated clay adsorption was investigated depending on process parameters: the adsorbent dose, pH, temperature, initial dye concentration, and contact time. Experimental data were analyzed by Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm as well as kinetic models of pseudo-first order, pseudo-second order and intra-particle diffusion. The process of dye adsorption was best described by Langmuir, Temkin, and Dubinin-Radushkevich isotherm (R2 > 0.97). Pseudo-second order model (R2 > 0.99) had the highest correlation with the obtained kinetic results. The positive value of ?H? indicated that adsorption of dyes by activated bentonite clay is endothermic process. The activated bentonite exhibited good regenerative ability in the 0.1 M NaOH solution. Maximum adsorption capacities of acid activated bentonite clay at 25?C for DR 173 and RR 22 dyes were 356.65 and 109.58 ?mol g-1, respectively.

scholarly journals A study of adsorption isotherms for the removal of herbicide Atlantis WG from aqueous solutions by using Bentonite clay

2015 ◽  
Vol 12 (1) ◽  
pp. 148-156
Author(s):  
Baghdad Science Journal
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Process ◽  
Equilibrium Concentration ◽  
Bentonite Clay ◽  
Langmuir Model ◽  
Effect Of Temperature ◽  
Isotherm Models ◽  
Sorption Data ◽  
Freundlich Model ◽  
The Subject

The subject of this research involves studying adsorption to removal herbicide Atlantis WG from aqueous solutions by bentonite clay. The equilibrium concentration have been determined spectra photometry by using UV-Vis spectrophotometer. The experimental equilibrium sorption data were analyzed by two widely, Langmuir and Freundlish isotherm models. The Langmuir model gave a better fit than Freundlich model The adsorption amount of (Atlantis WG) increased when the temperature and pH decreased. The thermodynamic parameters like ?G, ?H, and ?S have been calculated from the effect of temperature on adsorption process, is exothermic. The kinetic of adsorption process was studied depending on Lagergren ,Morris ? Weber and Rauschenberg equations.

scholarly journals Potential of Iron Pillared Clay as Active Nanocatalyst for Rapid Decolorization of Methylene Blue

2019 ◽  
Vol 7 (2) ◽  
pp. 46-53
Author(s):  
Lal hmunsiama ◽  
◽  
Seung-Mok Lee ◽  
Keyword(s):  
Methylene Blue ◽  
Iron Oxide ◽  
Aqueous Solutions ◽  
Low Cost ◽  
Analytical Data ◽  
Bentonite Clay ◽  
Pillared Clay ◽  
Oh Radicals ◽  
Heterogeneous Structure ◽  
Iron Oxide Particles

In this study, the iron-pillared clay nanocatalyst (ICN) was employed as a nanocatalyst for decolorization of methylene blue (MB) in aqueous solutions without hydrogen peroxide. The changes in clay structure after the incorporation of iron-oxide particles was studied with the help of XRD analytical data. The SEM micrographs showed higher heterogeneous structure of ICN compared to pristine clay and the specific surface area of ICN (82.54 m2/g) is considerably higher than the unmodified clay (63.41 m2/g). Further, the EDX analytical data indicate the successful incorporation of iron-oxide into bentonite clay. Batch experiments showed that ICN could degrade MB within pH 3.0 to 11.0 and it is efficient even at higher concentrations. The degradation is very fast and more than 90% is removed within 30 mins. A small amount of ICN is effective for degradation of MB and the reusability test showed that ICN can be reuse for several times for the degradation of MB in aqueous solutions. The effect of scavengers studies indicate that the ·OH radicals generated from the ICN are responsible in the degradation of MB. This study indicates that ICN must be low cost and environmentally friendly active nanocatalyst for degradation of MB present in aquatic environment.

scholarly journals The Removal of Methyl Red from Aqueous Solutions Using Banana Pseudostem Fibers

2009 ◽  
Vol 6 (9) ◽  
pp. 1690-1700 ◽  
Author(s):  
Mas Rosemal H. Mas Har ◽  
Kathiresan Sathasivam
Keyword(s):  
Aqueous Solutions ◽  
Methyl Red

scholarly journals Cathodic hydrogen production by simultaneous oxidation of methyl red and 2,4-dichlorophenoxyacetate aqueous solutions using Pb/PbO2, Ti/Sb-doped SnO2 and Si/BDD anodes. Part 1: electrochemical oxidation

RSC Advances ◽  
2020 ◽  
Vol 10 (62) ◽  
pp. 37695-37706
Author(s):  
José Eudes L. Santos ◽  
Djalma R. da Silva ◽  
Carlos A. Martínez-Huitle ◽  
Elisama Vieira dos Santos ◽  
Marco A. Quiroz
Keyword(s):  
Hydrogen Production ◽  
Aqueous Solutions ◽  
Electrochemical Oxidation ◽  
Acidic Medium ◽  
Methyl Red ◽  
Simultaneous Oxidation ◽  
Bdd Anodes ◽  
Aqueous Acidic Medium

In this work, the electrochemical oxidation of a dye and an herbicide was investigated on non-active anodes in aqueous acidic medium in order to understand its effect to produce simultaneously hydrogen as eco-friendly energy alternative.

Use of HCl-modified bentonite clay for the adsorption of Acid Blue 129 from aqueous solutions

2015 ◽  
Vol 57 (19) ◽  
pp. 8894-8903 ◽  
Author(s):  
Zia Ullah ◽  
Sajjad Hussain ◽  
Saima Gul ◽  
Sabir Khan ◽  
F.K. Bangash
Keyword(s):  
Aqueous Solutions ◽  
Bentonite Clay ◽  
Modified Bentonite ◽  
Acid Blue 129 ◽  
Acid Blue
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