Kinetics and thermodynamics of Methylene Blue adsorption on Neem () leaf powder

Bhattacharyya, Krishna G.; Sharma, Arunima

doi:10.1016/j.dyepig.2004.06.016

Cited by 695 publications

(334 citation statements)

References 29 publications

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“…3, when the pH increases from 2 to 4 there is a steep increase in adsorption of methylene blue and no significant change in the amount adsorbed by further increase of pH up to 8. Similar findings were reported by many authors so far (Hamdaoui, 2006;Wang et al, 2005;Dogan et al, 2004;Bhattacharyya and Sharma, 2005). The pH trend observed clearly indicates that the maximum adsorption of methylene blue takes place at both neutral and slightly basic pH.…”

Section: Effect Of Phsupporting

confidence: 78%

Application of biowaste (waste generated in biodiesel plant) as an adsorbent for the removal of hazardous bye - methylene blue - from aqueous phase

Gottipati

Mishra

2010

Braz. J. Chem. Eng.

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-Solid waste (SW) from a biodiesel plant has been successfully used for the removal of the hazardous cationic water soluble dye -methylene blue (MB) -from an aqueous phase. Batch adsorption studies were carried out by monitoring the pH, amount of adsorbent, initial dye concentration and contact time. Attempts have also been made to monitor the adsorption process through Langmuir, Freundlich, Temkin and D-R adsorption isotherm models. Relevant thermodynamic parameters were calculated and it was found that the adsorption process was exothermic and feasible at low temperatures. The nature and randomness of the adsorption process was determined by calculating the thermodynamic parameters such as Gibbs free energy (∆G o ), change in entropy (∆S o ) and heat of adsorption (∆H o ). The kinetics of the adsorption indicates that the process is pseudo-second-order and also reveals the involvement of bulk diffusion and intraparticle diffusion mechanisms.

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Section: Effect Of Phsupporting

confidence: 78%

Application of biowaste (waste generated in biodiesel plant) as an adsorbent for the removal of hazardous bye - methylene blue - from aqueous phase

Gottipati

Mishra

2010

Braz. J. Chem. Eng.

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“…A plot of t/ q t versus t gives a linear relationship, from which q e and k 2 can be determined from the slope and intercept (Bhattacharyya and Sharma 2005). The data for the adsorption of MB on Pc/TW were applied to pseudo-first-and second-order kinetic models, and the results are presented in Table 1.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…Among these investigated methods, adsorption is a fast, inexpensive and widely applicable for the removal of dyes due to its simplicity, economic viability and technical feasibility (Pathania and Sharma 2012;Bhattacharyya and Sharma 2005).…”

Section: Introductionmentioning

confidence: 99%

Pectin–cerium (IV) tungstate nanocomposite and its adsorptional activity for removal of methylene blue dye

Gupta

Pathania

Singh

2013

Int. J. Environ. Sci. Technol.

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Pectin-cerium (IV) tungstate composite (Pc/ CT) has been prepared by sol gel method at room temperature. The composite ion exchanger has been characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy and Fourier infrared spectroscopy. The ion exchange capacity, pH titrations, thermal stability and distribution coefficient of composite ion exchanger were investigated. The Na ? ions exchange capacity of the Pc/CT has been observed higher (1.4 meq g -1 ) as compared to its inorganic counterpart (0.8 meq g -1 ). Pc/CT composite ion exchanger was thermally stable and retained about 60 % of its ion exchange capacity up to 400°C. The distribution study has inferred more selective the Pc/CT for Zn 2? as compared to other metal ions. The adsorption efficiency of Pc/CT was tested for methylene blue removal dye from aqueous phase. The removal of dye followed pseudo-second-order kinetics.

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“…Most of these dyes pose acute problems for the ecological system, as they are toxic and have carcinogenic properties, which make the water contaminated with dyes inhibitory to aquatic life [2][3][4]. With industrialization, the discharge of industrial wastewater has increased.…”

Section: Introductionmentioning

confidence: 99%

Removal of a Cationic Dye -Méthylène Bleu- From Aqueous Solution by Adsorption onto Oil Shale Ash of Timahdit (Morocco)

Miyah¹,

Idrissi²,

Zerrouq³

2014

IJIRSET

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This article presents two aspects environnementals: valorization of oil shale ash (OSA) of oil industry on the one hand, and on the other hand to study the effectiveness of cation adsorption of dye such as the Methylene blue (BM) on material (OSA).In this context, we carried out a parametric study of adsorption, in particular, the time of contact, the pH, the amount of the adsorbent, the temperature and the stirring velocity. A study of the kinetics of adsorption was carried out by two models: pseudo-first order and pseudo-second order, and a modeling by the isotherms of adsorption while basing itself on the models of Langmuir and Frendlich. The maximum capacity of adsorption of BM on OSA is of 2,464 mg/g, for a concentration of BM of 5 mg/L, an amount of adsorbent of 2 g/L. Material OSA was characterized by several methods such as diffraction of x-ray (DRX), electronic scan microscopy (MEB), electronic microscopy in transmission (MET), x-ray fluorescence (FX), and the infra-red Spectroscopy with transforms of Fourier (FTIR). In addition, the economic aspect of the use of OSA makes important the re-use of these materials considering their capacity to regenerate itself.

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Kinetics and thermodynamics of Methylene Blue adsorption on Neem () leaf powder

Cited by 695 publications

References 29 publications

Application of biowaste (waste generated in biodiesel plant) as an adsorbent for the removal of hazardous bye - methylene blue - from aqueous phase

Application of biowaste (waste generated in biodiesel plant) as an adsorbent for the removal of hazardous bye - methylene blue - from aqueous phase

Pectin–cerium (IV) tungstate nanocomposite and its adsorptional activity for removal of methylene blue dye

Removal of a Cationic Dye -Méthylène Bleu- From Aqueous Solution by Adsorption onto Oil Shale Ash of Timahdit (Morocco)

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