Biosorption of heavy metals from aqueous solutions onto peanut shell as a low-cost biosorbent

Witek‐Krowiak, Anna; Szafran, Roman G.; Modelski, S.

doi:10.1016/j.desal.2010.07.042

Cited by 376 publications

(191 citation statements)

References 53 publications

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“…in which A and B are constants, and A corresponds to the speed of initial chemisorption (mg g −1 h −1 ) and B is the number of suitable sites for adsorption, which is related to the extent of surface coverage and the activation energy of the chemisorption (g mg −1 ) (Witek-Krowiak et al 2011).…”

Section: Kinetic Mechanism Of Adsorptionmentioning

confidence: 99%

Removal of Cd(II), Pb(II) and Cr(III) from water using modified residues of Anacardium occidentale L.

et al. 2018

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The pollution of water has been one of the greatest problems faced by the modern society, due to industrialization and urban growth. Rivers, lakes and seas have been continually suffering from the rising concentration of various pollutants, especially toxic elements. This study aimed to evaluate the use of cashew nut shell (Anacardium occidentale) (CNS), after chemical modification with H 2 O 2 , H 2 SO 4 and NaOH, as an new and renewable adsorbent material, for the removal of metals Cd 2+ , Pb 2+ and Cr 3+ in aqueous medium. The adsorbents were characterized by its chemical constitution, structure, infrared spectroscopy, morphology, by means of scanning electron microscopy, determination of the point of zero charge, thermogravimetrical analysis and porosimetry assessments. Tests were conducted to determine the optimal conditions (pH vs. adsorbent mass) for adsorption, by means of multivariate analysis using a central composite design. The adsorption kinetics was evaluated by models of pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion, while adsorption isotherms were linearized by Langmuir, Freundlich and Dubinin-Radushkevich. The effect of initial concentration, temperature and desorption was also performed. The adsorbents exhibited irregular, spongy and heterogeneous structure. FTIR analysis confirms the presence of hydroxyl, aliphatic, phenolic and carboxylic acid groups, which are favorable adsorption characteristics. The pH PZC of adsorbent is 4.35, 2.50 e 6.92, respectively, for CNS H 2 O 2 , H 2 SO 4 and NaOH. The optimum adsorption conditions were as follows: pH 5.0; relation of adsorbent mass/volume of water: 4 g L −1 ; 40 min of contact time for reaching the equilibration. Results suggest the predominance of chemisorption of Cd 2+ and Cr 3+ . Most of biosorbents exhibited good fit by Langmuir and Freundlich, suggesting the occurrence of adsorption on mono-and multilayers. The adsorbents of cashew nut shell exhibited high removal efficiency of Cd, Pb and Cr from waters.

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Section: Kinetic Mechanism Of Adsorptionmentioning

confidence: 99%

Removal of Cd(II), Pb(II) and Cr(III) from water using modified residues of Anacardium occidentale L.

et al. 2018

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“…This result indicates adsorption of ions on the relatively strong biosorbent surface and suggests the presence of high energetic sites occupied first by metals. 10 The average sorption energy (E) obtained through the mathematical model of Dubinin-Radushkevich differentiates a process of chemical or physical nature. 13 Values of E between 1 and 8 kJ mol −1 indicates physical adsorption; those higher than 8 kJ mol −1 indicate that the process has a chemical nature.…”

Section: Models Of (A) Pseudo-first Order (B) Pseudo-second Ordermentioning

confidence: 99%

“…8,9 Many physical and chemical methods have been developed to remove heavy metals from solution such as ion exchange, chemical precipitation, and membrane separation; however, many of these process are expensive, have low selectivity and result in incomplete removal of pollutants. 10 Adsorption has emerged as a very efficient process considered effective in removing heavy metals from contaminated aqueous solutions. 11 For this technique, the most commonly used material is activated carbon, which is highly efficient in various situations.…”

Section: Introductionmentioning

confidence: 99%

Biosorption and removal of chromium from water by using moringa seed cake (Moringa oleifera Lam.)

et al. 2013

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Recebido em 14/11/12; aceito em 13/5/13; publicado na web em 17/7/13 This study evaluated the adsorption capacity of chromium from contaminated aqueous solutions by using Moringa oleifera Lam. seeds. Parameters such as solution pH, adsorbent mass, contact time between solution and adsorbent, isotherms, thermodynamic, kinetics, and desorption were evaluated. The maximum adsorption capacity (Q m ) calculated to be 3.191 mg g −1 for the biosorbent. Activated carbon was used for comparison purposes in addition to the biosorbent. The best fit was obtained by the Langmuir model for both adsorbents. The average desorption value indicated that both the biosorbent and activated carbon have a strong interaction with the metal. The results showed that the biosorbent has advantages owing to its low cost and efficiency in Cr 3+ removal from contaminated waters.

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“…Various studies using lignocelluloses for adsorption of various metal ions have been investigated (Chamarthy et al 2001;Wafwoyo et al 1999;Wilson et al 2006;Witek-Krowiak et al 2011). Peanut shells are an inexhaustible, nonedible, and renewable lignocellulosic material resource that can be used as an economical sorbent (Chamarthy et al 2001;Wafwoyo et al 1999;Witek-Krowiak et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) from Solution using Peanut Shell as Biosorbent in the Presence of Amino Acid and Sodium Chloride

Ouyang¹,

Liu²,

Wen³

2014

BioResources

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Currently, marine protein byproducts are mainly hydrolyzed and prepared for applications that depend on their physiological activity. Such uses require strict removal of heavy metal ions from the material. In this work, a green approach was proposed using peanut shells as adsorbent to remove Pb(II) from solutions containing amino acid and sodium chloride. The effects of amino acids and sodium chloride on the removal of Pb(II), as well as the influence of liquid to solid ratio, pH, temperature, and contact time on the adsorption, were studied. The results showed that the content of sodium chloride and amino acid could significantly decrease the adsorption efficiency for Pb(II). The experimental data could be described with the Langmuir adsorption isotherm model and pseudo-second order kinetic model. The adsorption capacity of the sorbent for Pb(II) was calculated from the Langmuir isotherm model and found to be 7.1 mg g -1 at pH 4.

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Biosorption of heavy metals from aqueous solutions onto peanut shell as a low-cost biosorbent

Cited by 376 publications

References 53 publications

Removal of Cd(II), Pb(II) and Cr(III) from water using modified residues of Anacardium occidentale L.

Removal of Cd(II), Pb(II) and Cr(III) from water using modified residues of Anacardium occidentale L.

Biosorption and removal of chromium from water by using moringa seed cake (Moringa oleifera Lam.)

Adsorption of Pb(II) from Solution using Peanut Shell as Biosorbent in the Presence of Amino Acid and Sodium Chloride

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