Heavy metals removal by adsorption onto peanut husks carbon: characterization, kinetic study and modeling

Ricordel, S.; Taha, Samir; Cissé, Ibrahima; Dorange, G.

doi:10.1016/s1383-5866(01)00139-3

Cited by 316 publications

(113 citation statements)

References 20 publications

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“…Adsorption technology is presented to be one of the most promising methods to this end [4][5][6]. Activated carbons to remove heavy metals are currently produced from a variety of starting materials such as wastes and agricultural residues [7][8][9][10][11], and polymers [12,13] and mixed solid waste [14] and rubber wood sawdust [15]. Nowadays, there is a great interest in finding inexpensive and effective alternatives to the existing commercial activated carbon [16,17].…”

Section: Introductionmentioning

confidence: 99%

Valorization of agricultural waste into activated carbons and its adsorption characteristics for heavy metals

et al. 2014

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Activated carbon derived from pine cones waste was prepared by carbonization at 450 • C, activated by different activating agents: ZnCl 2 , H 2 SO 4 and NaOH, and then pyrolyzed at 600 • C. Adsorption of Cr VI and other heavy metals (Mn II, Fe II, Cu II) on activated carbons was investigated to evaluate the adsorption properties. Special attention was paid to the effects of carbon surface functionalities that were analyzed by FT-IR and zeta potential study. Moreover, XRD study of activated carbon was also carried out. Results had shown that activated carbon by NaOH was the best adsorbent for removal of chromium VI from wastewater. The solid-solution interaction was determined by analyzing the adsorption isotherms at room temperature at different pH. When pH is above 4, the removal fraction of Cr (VI) ions decreased with the increase of pH. The removal fraction of Cr (VI) ions decreased below pH 4. The preferable removal of Cu (II) over Mn(II) and Fe (II) could be due to its lower affinity to solvent.Pseudo-second order equation provided the better correlation for the adsorption kinetics data. Equilibrium isotherms were determined by Fowler-Guggenheim model.

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Section: Introductionmentioning

confidence: 99%

Valorization of agricultural waste into activated carbons and its adsorption characteristics for heavy metals

et al. 2014

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“…Since lead does not degrade in environment like organic pollutants [4], the safe and effective disposal of wastewater containing Pb 2+ is always a challenge to industrialists and environmentalists [5]. At present, various methods including chemical precipitation, electrochemical reduction, ion exchange, reverse osmosis, membrane separation, and adsorption have been developed to remove Pb 2+ from wastewater [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Studies of Coconut Shell Carbons Prepared by KOH Activation for Removal of Lead(II) From Aqueous Solutions

et al. 2013

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Abstract:Removal of Pb 2+ from aqueous solutions using coconut shell carbons produced by KOH activation is performed in this paper. Morphology and pore structure characteristic of coconut shell carbons are analyzed by SEM and nitrogen adsorption techniques. Effects of adsorbent concentration, agitation time and initial ion concentration on the adsorption behavior are investigated, and adsorption isotherm and kinetics on coconut shell carbons are also studied. The results show that high weight ratio of KOH/sample is favorable to produce rich porous structure. The resultant coconut shell carbons with a high specific surface area of 1135 m 2 /g is obtained and demonstrates good adsorption potential on removal of Pb 2+ from aqueous solutions. Adsorption data fit well with Freundlich and Halsey isotherms. The kinetic studies indicate that adsorption behavior can be described by pseudo-second-order kinetic model, which also follows external diffusion and intra-particle diffusion in the adsorption process.

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“…Metal adsorption capacity is influenced strongly by the surface structures of C-O and C-OH functional groups which are present in organic materials (Ricordel et al 2001). Functional groups in poplar wood sawdust were determined using FTIR spectroscopy.…”

Section: Poplar Sawdust Infrared Spectrummentioning

confidence: 99%

Utilization of poplar wood sawdust for heavy metals removal from model solutions

Demcak¹,

Bálintová²,

Hurakova³

et al. 2017

Nova Biotechnologica Et Chimica

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Some kinds of natural organic materials have a potential for removal of heavy metal ions from wastewater. It is well known that cellulosic waste materials or by-products can be used as cheap adsorbents in chemical treatment process. In this paper, poplar wood sawdust were used for removal of Cu(II), Zn(II) and Fe(II) ions from model solutions with using the static and dynamic adsorption experiments. Infrared spectrometry of poplar wood sawdust confirmed the presence of the functional groups which correspond with hemicelluloses, cellulose and lignin. At static adsorption was achieved approximately of 80 % efficiency for all treated model solutions. Similar efficiency of the adsorption processes was reached after 5 min at dynamic condition. The highest efficiency of Cu(II) removal (98 %) was observed after 30 min of dynamic adsorption. Changes of pH values confirmed a mechanism of ion exchange on the beginning of the adsorption process.

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Heavy metals removal by adsorption onto peanut husks carbon: characterization, kinetic study and modeling

Cited by 316 publications

References 20 publications

Valorization of agricultural waste into activated carbons and its adsorption characteristics for heavy metals

Valorization of agricultural waste into activated carbons and its adsorption characteristics for heavy metals

Adsorption Studies of Coconut Shell Carbons Prepared by KOH Activation for Removal of Lead(II) From Aqueous Solutions

Utilization of poplar wood sawdust for heavy metals removal from model solutions

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