Adsorption of methylene blue by acid and heat treated diatomaceous silica

Al-Qodah, Zakaria; Lafi, Walid K.; Al-Anber, Zaid Ahmed; Al-Shannag, Mohammad; Harahsheh, Adnan Al

doi:10.1016/j.desal.2007.03.003

Cited by 131 publications

(82 citation statements)

References 24 publications

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“…On inhaling, symptoms such as difficulties in breathing, vomiting, dermatitis, diarrhea and cancer can occur for human beings (Bilal, 2004;Dursun et al, 2007;Cengiz and Cavas, 2008;Al-Qodah et al, 2007;Namasivayam and kavitha, 2002). By design, these dyes are highly stable molecules, made to resist degradation by light, chemical, biological and other exposures (EI-Qada et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…While the silica component provides high adsorption capacity, PVC matrix keeps the silica particles coherent and hinders the contamination of the solution with dispersed silica. 90% clarification of a 0.02 gdm -3 MB solution was achieved through the use of 16% silica containing composite for the solid liquid ratio of 0.12 g/cm 3 . Since silica component is the main adsorbing site, the more the silica is added into the composite, the higher is the adsorption capacity to be introduced.…”

Section: Discussionmentioning

confidence: 99%

“…This temperature was chosen, since PVC was not thermally stable at higher temperatures. The density of the flexible composite sheets of 314 -563 μm thickness, as measured by using water in a glass pycnometer, increased from 1.098 to 1.231 g/cm 3 as the silica content increased. The sheets had up to 7.3% empty volume which could be attributed incomplete air removal due to high viscosity of the plastisol.…”

Section: Structure Of Compositesmentioning

confidence: 99%

“…In removal of dyes as well as pure adsorbents, composite materials having adsorbents as dispersed phase are used. Silica (SiO 2 ) gel, silica aerogel 1 , highly ordered mesoporous silica structures 2 , diatomaceous silica 3 , luffa fibers 4 , rice hull ash 5 polyurethane foams 6 are examples of the pure adsorbents recently used for methylene blue adsorption. Composite materials such as rice husk/silica nanocomposite 7 , activated carbon/ cobalt ferrite, alginate composite beads 8 , humic acid immobilized polymer/bentonite composites 9 , p o l y m e r / a c t i v a t e d c h a r c o a l composites 10 , activated carbon and conducting polymer composites 11 , chitosan based materials 12 , acrylic amide and acrylic acid copolymer and polyvinyl alcohol interpenetrating networks 13 are the composite materials used for this aim.…”

Section: Introductionmentioning

confidence: 99%

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Flexible Pvc-Silica Composites as An Adsorptive Material for Water Soluble Dyes

Ulutan

Yetgin

Balköse

2013

Polymers and Polymer Composites

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SUMMARyMethylene Blue (MB) adsorption studies were performed on flexible Polyvinyl Chloride/Silica composites which were obtained by using plastisol-plastigel technology. Change of MB concentration in aqueous phase as the adsorption process advanced was followed by using visible spectroscopy. The diffusion of MB through the composites exhibited non-Fickian behavior with a diffusivity of 10 -11 m 2 s -1. Making use of such PVC-silica composite sheets as column packing, the packing time will be reduced and the surface available for diffusion will be increased.

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“…These methods are not very successfully due to suffering from many restrictions (Sulak et al 2007). Adsorption (Al-Qodah and Shawabkah 2009;Al-Qodah et al 2007) is one of the most popular and extensively used methods for the removal of various dyes from wastewaters. Activated carbons are carbonaceous materials that can be distinguished from elemental carbon by the oxidation of the carbon atoms found on the outer and inner surfaces (Mattson and Mark 1971).…”

Section: Introductionmentioning

confidence: 99%

The potential use of activated carbon prepared from Ziziphus species for removing dyes from waste waters

Regti¹,

Laamari²,

Stiriba³

et al. 2017

Appl Water Sci

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In this study, the adsorption potential of activated carbon prepared from Ziziphus mauritiana nuts for the removal of methylene blue (MB) from aqueous solution has been investigated using batch mode experiments. The effects of some operating parameters on the removal dye such as, initial pH (2-12), temperature (298-328 K), initial MB concentration (20-100 mg L -1 ), and contact time (5-70 min) were investigated. Adsorption kinetic showed that the rate adsorption followed the pseudo-second-order kinetic model. Four adsorption isotherms models were applied to experimental equilibrium data (Langmuir, Freundlich, Redlich-Peterson, and Fritz-Schlunder) and the different constants were calculated using non-linear equations models. Fritz-Schlunder model was found the best one to describe the adsorption process which suggests that the adsorption of MB onto activated carbon derived from Ziziphus mauritiana is heterogeneous with a multilayer. Thermodynamic adsorption showed that the process was endothermic and spontaneous in nature.

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Adsorption of methylene blue by acid and heat treated diatomaceous silica

Cited by 131 publications

References 24 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

Flexible Pvc-Silica Composites as An Adsorptive Material for Water Soluble Dyes

The potential use of activated carbon prepared from Ziziphus species for removing dyes from waste waters

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