The effect of surface modification on heavy metal ion removal from water by carbon nanoporous adsorbent

Baniamerian, M.J.; Moradi, S.E.; Noori, Abolhassan; Salahi, H.

doi:10.1016/j.apsusc.2009.08.106

Cited by 78 publications

(35 citation statements)

References 26 publications

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“…Heavy metals especially those accumulated within the living organisms as well as in human body are dangerously toxic and environmentally harmful substances (Aksu and Akpinar 2001). These metals have attracted much concern in recent years (Baniamerian et al 2009). Among these heavy metals, chromium (Cr) is one of the priority pollutants in surface water and groundwater.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of chromium(VI) from aqueous solutions using waste plant biomass

Mishra

Dubey

Shinghal

2014

Int. J. Environ. Sci. Technol.

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Metal biosorption on plant-based materials and agricultural wastes is a well practiced but a complex process affected by several factors. The biosorption of chromium(VI) from aqueous solution onto waste plant biomass of Portulaca Oleracea was studied in the present work. Batch studies were carried out to examine the effects of process parameters. Influence of altering various process parameters was studied. The biosorption process was fast, and equilibrium was achieved in 45 min of contact time. It was found that the biosorption capacity of plant material depends on many factors mainly on solution pH, with a maximum biosorption capacity for chromium at pH 2. The biosorption kinetics was tested with pseudofirst-order and pseudo-second-order reaction, and results showed that biosorption followed pseudo-second-order rate expression. Experimental equilibrium data were applied to two different isotherm models. Isotherm tests showed that equilibrium sorption data were better represented by Langmuir model, and the sorption capacity of plant biomass was found to be 54.945 mg/g. Thermodynamic parameters like DG 0 , DH 0 and DS 0 were also evaluated, and it was found that the biosorption was spontaneous and endothermic in nature. Plant biomass was found to be an effective adsorbent for chromium(VI) from aqueous solution. This study indicated that plant biomass could be used as an efficient, cost-effective and environmentally safe biosorbent for the treatment of chromium containing aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Biosorption of chromium(VI) from aqueous solutions using waste plant biomass

Mishra

Dubey

Shinghal

2014

Int. J. Environ. Sci. Technol.

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“…for adsorption of Pb(II) on activated carbons or coal), one can see in literature equilibration time elapsing from one hour (Imamoglu & Tekir, 2008) to two hours to 48 hours or even up to 7 days (Giraldo-Gutierrez & Moreno-Pirajan;. In a more detailed view, the kinetics of adsorption process on porous solid is controlled by three consecutive steps (Baniamerian et al, 2009;Mohan & Chander, 2006;Mohan et al, 2001): (i) transport of the adsorbate from the bulk solution to the film surrounding the adsorbent, (ii) diffusion from the film to the proper surface of adsorbent, and (iii) diffusion from the surface to the internal sites followed by adsorption immobilization on the active sites. Some authors aimed at expressing the kinetics of the individual diffusion steps (e.g.…”

Section: Kinetics Of Adsorption Of Heavy Metals On Coals and Carbonsmentioning

confidence: 99%

Immobilization of Heavy Metal Ions on Coals and Carbons

Taraba¹,

Mars̆álek²

2011

Waste Water - Treatment and Reutilization

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“…The kinetics of adsorption process on porous materials such as zeolites is controlled by three consecutive steps (Mohan et al, 2001;Baniamerian et al, 2009): transport of the adsorbate from the bulk solution to the film surrounding the adsorbent, diffusion from the film to the proper surface of adsorbent, and diffusion from the surface to the internal sites followed by adsorption immobilization on the active sites. Our study of adsorption kinetics of Cr +3 and Ni +2 ions was performed on faujasite-type zeolite at room temperature over 24 hours.…”

Section: +2mentioning

confidence: 99%