Adsorption of basic dyes onto montmorillonite

Wang, Cheng-Cai; Juang, Lain-Chuen; Hsu, Ting-Chu; Lee, Chung‐Kung; Lee, Jiunn‐Fwu; Huang, Fu-Chuang

doi:10.1016/j.jcis.2003.12.028

Cited by 235 publications

(110 citation statements)

References 49 publications

(62 reference statements)

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“…This negative charge is balanced by the presence of replaceable cations (Ca 2+ , Na + , etc.) in the lattice structure, which enhance adsorbing cationic pollutants [15][16][17]. Although, bentonite weakly adsorbs acidic contaminants due to repulsion force between the anion and the negative charge on the surface of the bentonite [18,19].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Acid Dyes onto Bentonite and Surfactant-modified Bentonite

Youssef¹,

MM²

2013

J Anal Bioanal Tech

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Adsorption of Congo red (CR) from water via batch adsorption experiments onto bentonite and CTAB-modified bentonite (CTAB-MBn) was investigated. Studies concerning the factors influencing the adsorption capacities of bentonite and CTAB-MBn, such as initial dye concentration, adsorbent dosage, pH, ionic strength, contact time and temperature were systematically investigated and discussed. The results revealed that CTAB-modified bentonite demonstrated high adsorption capacities toward acid dyes, while bentonite exhibited sorption capacities lower than CTAB-MBn. The kinetics data were analyzed using first order and pseudo-second order models. It was best described by the pseudo-second order model. The isotherm data were investigated accord¬ing to Langmuir and Freundlich equations. Thermodynamic parameters ΔG°, ΔH° and ΔS° were calculated for the adsorption of CR on bentonite and CTAB-MBn ; the value of ΔG° showed the spontaneous nature of adsorption for both sorbents.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Acid Dyes onto Bentonite and Surfactant-modified Bentonite

Youssef¹,

MM²

2013

J Anal Bioanal Tech

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“…Different adsorbents such as zeolite, perlite, bentonite, kaolite, rice husk, maize cob, coir, bagass pith, waste sludges, etc. have been employed for removal of dyes from effluents (Sharma, et al, 2009;Sung, et al, 2006;Alkan, et al, 2005;Wang, et al, 2004;Gurses, et al, 2004;Espantaleon, et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Study on the preparation of polymer-grafted coir fibre based adsorbent and its application to remove a reactive dye from aqueous solution

Ray

Saha

Nur

et al. 2014

Bangladesh J. Sci. Ind. Res.

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Holocellulose was separated from Coir fibre by Sodium chlorite bleaching procedure. The adsorbent was synthesized by graft-copolymerization of acrylamide onto separated cellulose using potassium persulfate as a free radical initiator. Grafting percentage and grafting efficiency were measured and found to be 74.5 and 58% respectively. Prepared adsorbent was characterized by applying Fourier TransformInfrared Spectrophotometer, Thermogravimetric/Differential Thermal Analyzer and Scanning Electron Microscope. Adsorbent prepared from holocellulose was successfully used at different adsorbent dosage, contact time, initial dye concentration and temperature to remove "Reactive Orange-16", a reactive dye from aqueous solution. Ultraviolet-Visible Spectrophotometric measurement of the dye in untreated and treated solutions showed that 0.2 g Holocellulose and Polyacrylamide-grafted holocellulose can remove 42% and 72% of Reactive Orange-16 dye from its 10 ppm aqueous solution within 1 hrs respectively. It may be proposed that Polyacrylamide-grafted holocellulose can be used in a traditional Textile Effluent Treatment Plant (ETP) as a cost effective adsorbent/alternative for decreasing the concentration of the reactive dye in the effluent.

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“…Therefore, there is a need to find an effective and low cost material as an alternative adsorbent for removing the dyes from water. Among the materials that fulfil these requirements, natural adsorbents such as clays and clay minerals [14][15][16][17], zeolites [18], agricultural materials [19][20][21], cellulosic materials, and various industrial wastes have been investigated in various water depollution studies [22][23][24][25]. However, very few studies have focused on the use of quartz sand, as an adsorbent for the removal of dyes from water [26,27].…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Removal of Organic Dye at Quartz Sand-Water Interface

Jada

Akbour

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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IFP Energies nouvelles International Conference Rencontres Scientifiques d'IFP Energies nouvellesRe´sume´-Adsorption et de´sorption d'un colorant organique a`l'interface sable de quartz-eauNous avons e´tudie´le transport, la sorption et la de´sorption d'un cation organique (bleu de me´thyle`ne (BM)), a`travers un milieu poreux constitue´de particules de sable de quartz charge´es ne´gativement. Nous avons examine´l'influence des parame`tres, tels que : la force ionique de la solution aqueuse, la vitesse de circulation, le pH de la phase aqueuse, la tempe´rature du milieu et la nature des cations divalents me´talliques pre´sents en solution, sur le transport et le de´poˆt du BM à travers le milieu poreux. Les mesures de la re´tention du colorant ont e´te´re´alise´es en utilisant la technique d'injection-e´chelon. Les re´sultats obtenus ont montre´une diminution de la quantite´de BM adsorbe´sur le quartz lorsque le pH de la phase aqueuse diminue de 9,5 a`4. Une baisse de la quantite´de BM adsorbe´a e´te´e´galement observe´e lorsque la force ionique ou le de´bit augmente. Cependant, l'augmentation de la tempe´rature a conduit a`une augmentation de la quantite´de BM adsorbe´e, ce qui laisse supposer que l'adsorption du BM sur la surface de quartz est de nature endothermique. En pre´sence de cations divalents en solution (Ca 2+ , Cu 2+, Zn 2+ et Ba 2+ ), la quantite´retenue du colorant de´pend de la nature du cation. L'ensemble de ces re´sultats, montre que l'adsorption du colorant basique est controˆle´e par les interactions e´lectrostatiques entre la surface ne´gative du quartz et le polluant organique cationique.Abstract -Adsorption and Removal of Organic Dye at Quartz Sand-Water InterfaceWe studied the transport, sorption and desorption of organic cation (Methylene Blue, MB) through a porous medium consisting of quartz sand particles negatively charged. We examined various parameters such as the ionic strength of the aqueous solution, the flow velocity, the pH of the aqueous phase, the temperature of the medium and the nature of the divalent metal cations present in solution, which affect the transport and the deposition of MB through the porous medium.Step-input experiments were carried out to measure the dye retention. The data showed a decrease in the MB adsorbed amount on the quartz, when the pH of the aqueous phase, or the temperature, decreases, or when the flow rate, or the affinity of the divalent cation (Ca 2+ , Cu 2+ , Zn 2+ and Ba 2+) toward the quartz surface increases. The increase in ionic strength leads to a small decrease in the MB adsorbed amount. However, the increase in temperature leads to an increase in the retained MB amount, which suggests that the adsorption of MB on the surface of quartz is endothermic in nature. The overall data indicate that, at ambient temperature, electrostatic interaction forces, which occur between the cationic organic pollutant and the negative surface of the quartz substrate, mainly control the adsorption process.

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Adsorption of basic dyes onto montmorillonite

Cited by 235 publications

References 49 publications

Adsorption of Acid Dyes onto Bentonite and Surfactant-modified Bentonite

Adsorption of Acid Dyes onto Bentonite and Surfactant-modified Bentonite

Study on the preparation of polymer-grafted coir fibre based adsorbent and its application to remove a reactive dye from aqueous solution

Adsorption and Removal of Organic Dye at Quartz Sand-Water Interface

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