Lead(II) adsorption by peach palm waste

Salvado, A.P.A.; Campanholi, L.B.; Fonseca, Jhessica M.; Tarley, César Ricardo Teixeira; Caetano, Josiane; Dragunski, Douglas Cardoso

doi:10.1080/19443994.2012.698839

Cited by 19 publications

(13 citation statements)

References 32 publications

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“…The results demonstrate that the average desorption is 9%, that is, the adsorption (99.36% retention) of the metal species occurs irreversibly indicating that the material has more interaction with the metal under study (Salvado et al, 2012), facilitating its removal from the environment.…”

Section: Resultsmentioning

confidence: 84%

“…The negative value for the enthalpy (H = -10.26 kJ mol -1 ) means that the adsorption is exothermic. Entropy (S) had a value greater than zero (7.51 kJ mol -1 ), pointing to an increase in disorder at the interface of solid-solution, indicating spontaneous adsorption and that the process showed greater randomness (Salvado et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

“…The stirring time around 20 minutes was sufficient for binding sites to be available for adsorption of Cd, arranging the active sites into layers on the surface of the adsorbent. Low pH (acidic) results in protonation of the active sites of the adsorbent material causing a competition between cations and metal ions for sorption sites (Salvado et al, 2012;Tobin et al, 1984;Gardea-Torresdey et al, 2005).…”

Section: Resultsmentioning

confidence: 99%

“…With the data of initial and final concentrations of the solutions containing Cd before and after the adsorption process, it was possible to determine the amount of adsorbed metal for each solution using Equation 1 (Salvado et al, 2012). (1) where:…”

Section: Methodsmentioning

confidence: 99%

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Adsorption of cadmium in vegetable sponge (Luffa cylindrica)

Lindino¹,

Marciniak²,

Gonçalves³

et al. 2014

Rev. ambiente água

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The use of biomass as an adsorbent material follows the principles of sustainability and Green Chemistry. Given the low cost, high abundance, easy availability and high adsorption capacity of the vegetable sponge (Luffa cylindrica), this study aimed to explore the adsorption process of the toxic metal cadmium (Cd). The parameters evaluated were pH, contact time, adsorption isotherms, thermodynamic parameters, percolation and desorption. The proposed method showed high retention of Cd ions, being 99.80% at pH 5.0 for the percolation method, more effective than with stirring, which had 89.6%. It is noteworthy that the vegetable sponge adsorbs significant amounts of Cd in the range of pH 4.0 to 6.0, indicating that is not necessary to adjust pH for most treatments in real samples. The Cd ion is spontaneous and favorably adsorbed by this material, according to the Freundlich isotherm model. According to the obtained results, it is feasible to use vegetable sponge as a material for the remediation of effluents due to high retention of Cd ions.Keywords: green chemistry, sustainability, toxic metal. Adsorção de cádmio em esponja vegetal (Luffa cylindrica) RESUMOO uso da biomassa como material adsorvente segue os princípios da sustentabilidade e da Química Verde. O presente trabalho teve como objetivo estudar o processo de adsorção de cádmio (Cd) em esponja vegetal (Luffa cylindrica), em função de seu baixo custo, alta abundância, fácil disponibilidade e alta capacidade de adsorção. Neste estudo foram avaliados o pH, o tempo de contato, as isotermas de adsorção, os parâmetros termodinâmicos, a percolação e a dessorção. O método proposto mostrou elevada taxa de retenção de íons Cd na superfície da esponja vegetal, sendo de 99,80 % a um pH de 5,0 para o método de percolação que foi mais eficaz do que por agitação com 89,6 % de adsorção. A esponja vegetal adsorve quantidades significativas de Cd no intervalo de pH de 4,0 a 6,0, o que indica não ser necessário ajustar o pH para a maioria dos tratamentos em amostras reais. De acordo com o modelo de isoterma de Freundlich, a adsorção do íon Cd no material adsorvente estudado é

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption of cadmium in vegetable sponge (Luffa cylindrica)

Lindino¹,

Marciniak²,

Gonçalves³

et al. 2014

Rev. ambiente água

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show abstract

“…Em busca de novos materiais adsorventes este trabalho visa à utilização de resíduos do palmito pupunha o qual possui uma demanda nacional de 100000 t ano -1 , representando 18% do mercado deste produto no Brasil. Com características únicas, como produtividade precoce, a produção do palmito pupunha gera grande quantidade de biomassa (bainha, folhas, nervuras) propícia à utilização nos processos de adsorção (Chaimsohn, 2000;Salvado et al, 2012).…”

Section: Introductionunclassified

Biossorção de azul de metileno utilizando resíduos agroindustriais

Honorato

Machado

Celante

et al. 2015

Rev. bras. eng. agríc. ambient.

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R E S U M OO presente trabalho avaliou a capacidade de adsorção do corante azul de metileno nos resíduos da palha de milho e da bainha do palmito pupunha in natura. A caracterização dos resíduos foi determinada utilizando-se a microscopia eletrônica de varredura e espectroscopia na região do infravermelho a qual indicou a presença de grupos carboxílicos, hidroxila e carbonila. O tempo necessário para que o sistema atingisse o equilíbrio para ambos os resíduos foi de 240 min, seguindo uma cinética descrita pelo modelo de pseudosegunda ordem. A capacidade máxima de adsorção foi de 102,8 mg g -1 para o resíduo da palha de milho, seguindo o modelo de isoterma de Langmuir e 50,9 mg g -1 para o resíduo de palmito pupunha, sendo que o modelo que melhor se ajusta foi Freundlich. Desta forma, esses resíduos são promissores para a adsorção do corante azul de metileno em efluentes. Biosorption of methylene blue using agro-industrial residues A B S T R A C TThis study evaluated the ability of adsorption of methylene blue dye in waste of corn straw and sheath of palmetto pupunha in natura. The characterization of the waste was performed using MEV and spectroscopy in the infrared region, which indicated the presence of carboxyl groups, hydroxyl and carbonyl. The time required for the system to reach equilibrium for both residues was approximately 240 min, following the kinetics of pseudo-second order. The maximum adsorption capacity was 102.8 mg g -1 for corn straw, following the isotherm model of Langmuir and 50.9 mg g -1 for the residue of the sheath of palmetto pupunha, following the isotherm model of Freundlich. Thus, the wastes are promising for adsorption of methylene blue dye in effluents.Palavras-chave: efluente corante palha de milho palmito pupunha Key words: effluents dye corn stover palmetto pupunha

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Waste Biomass Suitable as Feedstock for Biofuels Production

Papadaki

2020

Process Systems Engineering for Biofuels Development

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Lead(II) adsorption by peach palm waste

Cited by 19 publications

References 32 publications

Adsorption of cadmium in vegetable sponge (Luffa cylindrica)

Adsorption of cadmium in vegetable sponge (Luffa cylindrica)

Biossorção de azul de metileno utilizando resíduos agroindustriais

Waste Biomass Suitable as Feedstock for Biofuels Production

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