Adsorption removal of malachite green dye from aqueous solution

Tewari, Kshitij; Singhal, Gaurav; Arya, Raj Kumar

doi:10.1515/revce-2016-0041

Cited by 53 publications

(20 citation statements)

References 174 publications

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“…(3) With The binding coefficient 0i is : (4) In all equations, we have, Xi + (0) is the concentration of the cation at the surface and may be calculated upon knowing its concentration in the equilibrium solution Xi(∞), since the distribution of the cation as a function of its distance from the surface, depends on the electric potential. For this, we may use Boltzmann's equation: (5) With (6) Where: e is the elementary charge, Zi is the valence of the ion, being positive for a cation and negative for an anion, y(0) is the surface potential, k B is the Boltzmann constant, T is the absolute temperature , and X i (∞) is the molar concentration of cation i in the solution heart, far from the surface. The potential value of the clay surface varies with the amount of adsorbed cations added.…”

Section: The Adsorbentmentioning

confidence: 99%

“…Adsorption has been widely recognized as effective and low-cost method to abet dye waste water even at low concentration 4 . Various types of adsorbent materials are available: activated carbon, silica, natural polymeric materials, sewage sludge, clays 5,6 . However the quality of the adsorbent must meet the scientific and economic criteria, such as the quantity to be treated (high cationic exchange capacity), favourable conditions for the elimination, regeneration and above all a very low cost process 7 .…”

Section: Introductionmentioning

confidence: 99%

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Ionic Strength Effect on Green Malachite Adsorption onto Moroccan Montmorillonite Clay: Experimental Study and Theoretical Investigation

Akichouh¹,

Salhi²,

Khoutoul³

et al. 2020

Orient. J. Chem

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The equilibrium adsorption process of Malachite green(MG) from an aqueous solution using Sodic Moroccan Montmorillonite Clay (Na-MMC) has been investigated under various experimental conditions. The effect of several inorganic salts (LiCl, NaCl, KCl, and CsCl) on malachite green adsorption at different ionic strength by sodic montmorillonite as well as the pH effect were investigated through a number of batch adsorption experiments. The dye concentration in the solution before and after adsorption was measured spectrophotometrically. The experimental isotherm data show that the maximum removal of MG was observed at pH in the rang 8-10. The adsorbed amount increases with the concentration of the sodium or lithium, however it decrease with cesium or potassium salts. A theoretical explanation of MG adsorption and ionic strength effect was given based on data modeling developed by Nir and Co. also. Geometry optimizations of MG molecule to get a better insight into structure geometry and reactivity were carried out by DFT calculations.

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Section: The Adsorbentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ionic Strength Effect on Green Malachite Adsorption onto Moroccan Montmorillonite Clay: Experimental Study and Theoretical Investigation

Akichouh¹,

Salhi²,

Khoutoul³

et al. 2020

Orient. J. Chem

View full text Add to dashboard Cite

show abstract

“…In wastewater treatment for separation of synthetic dyes, numerous physical methods have been used . These methods include ion‐exchange, irradiation, adsorption, electrokinetic coagulation and membrane filtration.…”

Section: Introductionmentioning

confidence: 99%

“…Adsorbents under inorganic class include silica gel, fly ash, clays, zeolites and metal oxides . In contrary, adsorbents under organic class include woodchips and peats, etc . One of the popular adsorbent widely used in separating dye molecules from wastewater is activated carbon.…”

Section: Introductionmentioning

confidence: 99%

A Critical Insight into Biomass Derived Biosorbent for Bioremediation of Dyes

et al. 2019

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Organic pollutants, such as dyes released during industrial operations are one of the major reasons for the degradation of water quality. However, treatment technologies to remediate these high volumes of wastewaters are often not sufficient. Hence, the excess dye wastewater generated is usually discharged without prior treatment. The use of adsorbents such as activated carbon is widely employed to separate dye molecules from wastewater. Biochar is a popular recent alternative for the treatment of dye‐bearing effluents to selectively isolate dye molecules. Biochar is normally manufactured in the oxygen free environment by thermal degradation of organic materials. On the other hand, dyes are extensively employed in many textile industries because of their desirable properties including attractive colour, water‐fast and easy application methods. Nevertheless, during the dyeing process of cellulose fibres around half of the applied dyes may enter the wash water, and these let outs are highly resistant to traditional wastewater treatment methods. Henceforth, new techniques need to be applied for successful remediation of dye wastewaters. In this perspective, an endeavor has been made in this work to explore the possibility and practicability of biochar as sorbent material for dyes.

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“…Various materials have been explored for removal of MG dye, such as zeolites, 10 activated carbon, [11][12][13] multi-walled carbon nanotubes, 14 biochar derived from agricultural wastes, 15 graphene-based materials [16][17][18] as well as metal-organic frameworks (MOFs). [19][20][21][22] Carbonaceous porous materials derived from MOFs have sparked great interest in adsorption, owing to their great thermal and chemical stability.…”

Section: Introductionmentioning

confidence: 99%