Assessment of chemically modified sugarcane bagasse for lead adsorption from aqueous medium

Santos, Vanessa Cristina Gonçalves dos; Tarley, César Ricardo Teixeira; Caetano, Josiane; Dragunski, Douglas Cardoso

doi:10.2166/wst.2010.291

Cited by 43 publications

(28 citation statements)

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“…13 Although an enthalpy value of less than 40 kJ mol −1 characterizes a process of physical adsorption, 41 the other observed parameters such as the value of E and the best fit obtained by the pseudo-second model confirm a chemical nature.…”

Section: Thermodynamic Parametersmentioning

confidence: 94%

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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Section: Thermodynamic Parametersmentioning

confidence: 94%

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

et al. 2013

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“…The use of various agroindustrial materials as potential adsorbents for the removal of metal ions from wastewater is reported in the literature: sunflower stem, rice bran [10], walnut shell [11], pine bark [12], wood bark [13], sugarcane bagasse [14,15], orange subproducts [16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Preparation and evaluation of kinetics and thermodynamics studies of lead adsorption onto chemically modified banana peels

Massocatto

Paschoal

Buzinaro

et al. 2013

Desalination and Water Treatment

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A B S T R A C TThe use of alternative materials for environmental decontamination has been intensively studied. In this study, the capacity of banana peels treated with sodium hydroxide (NaOH), hydrochloric acid (HCl), and phosphoric acid (H 3 PO 4 ) to adsorb Pb (II) was evaluated. The physical and chemical changes on the banana peels after chemical treatment were evaluated by infrared spectroscopy and scanning electron microscopy. Batch adsorption experiments were carried out as a function of pH, time, metal concentration, and temperature; desorption tests were also performed. Pb (II) concentrations were determined by flame atomic absorption spectrometry. An increase in the adsorption capacity of the modified and natural peels was observed in the pH range of 3-5, and pH 5 was adopted for further experiments. The adsorption system reached equilibrium in 300 min, and its kinetics followed the pseudo-second-order equation. From adsorption isotherms, it was observed considerable enhance on adsorption capacity of banana peels, especially with treated with NaOH. Besides, the negative Gibbs free energy variation values showed that the Pb (II) adsorption was spontaneous. Moreover, the improvement in the Pb (II) desorption for the modified peels was observed, indicating that the proposed material can be reutilized.

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“…To achieve suitable materials that replace the activated carbon, several studies have been performed involving agro-industrial wastes. Such materials have shown efficient adsorbent properties, besides being easy to obtain and presenting low cost (Dos Santos, Tarley, Caetano, & Dragunski, 2010).…”

Section: Introductionmentioning

confidence: 99%

<b>Biosorbent of macadamia residue for cationic dye adsorption in aqueous solution

et al. 2017

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ABSTRACT. This study evaluated the adsorption capacity of the methylene blue dye in macadamia residues, in natura and chemically modified. The waste characterization was performed using SME and spectroscopy in the infrared region, indicating the presence of carboxyl, carbonyl and hydroxyl groups. The equilibrium time for both residues was 240 minutes, following a kinetic described by models of the pseudo second-order and intra-particle diffusion. The maximum adsorption capacity was 117 mg g -1 to the residue in natura and 184 mg g -1 for the modified one, and was described by the Freundlich isotherm model. The system demonstrated to be spontaneous and favorable for both studied materials. Thus, these residues are promising for the adsorption of methylene blue dye in effluents.Keywords: effluent, agro industrial waste, methylene blue, Macadamia biomass.Resíduo de macadâmia como biossorvente para adsorção de corante catiônico em solução aquosa RESUMO. O presente trabalho avaliou a capacidade de adsorção do corante azul de metileno em resíduos de noz-macadâmia in natura e quimicamente modificado. A caracterização dos resíduos foi realizada utilizando MEV e espectroscopia na região do infravermelho a qual indicou a presença de grupos carboxílicos, carbonila e hidroxila. O tempo de equilíbrio alcançado para ambos os resíduos foi de 240 min., seguindo a cinética descrita pelos modelos de pseudo segunda-ordem e difusão intrapartícula. A capacidade máxima de adsorção foi 117 mg g -1 para o resíduo in natura e 184 mg g -1 para o modificado, sendo descrita pelo modelo isotérmico de Freundlich. O sistema mostrou-se espontâneo e favorável para os dois materiais estudados. Desta forma, estes resíduos são promissores para a adsorção do corante azul de metileno em efluentes.Palavras-chave: efluente, resíduo agroindustrial, azul de metileno, biomassa de macadâmia.

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Assessment of chemically modified sugarcane bagasse for lead adsorption from aqueous medium

Cited by 43 publications

References 0 publications

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

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

Preparation and evaluation of kinetics and thermodynamics studies of lead adsorption onto chemically modified banana peels

<b>Biosorbent of macadamia residue for cationic dye adsorption in aqueous solution

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