Marine macroalgae Pelvetia canaliculata (Linnaeus) as natural cation exchanger for metal ions separation: A case study on copper and zinc ions removal

Girardi, Franciélle; Hackbarth, Fabíola V.; Souza, Selene M.A. Guelli U. de; Souza, Antônio Augusto Ulson de; Boaventura, Rui A.R.; Vilar, Vítor J.P.

doi:10.1016/j.cej.2014.03.007

Cited by 49 publications

(22 citation statements)

References 56 publications

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“…Hackbarth et al [1] and Girardi et al [18] reported a total of acidic binding sites of 2.5 mEq/g (Carboxylic: 1.5 mEq/g; Sulfonic: 1.0 mEq/g), which are responsible for the sequestration of the metal cations. Beyond that, using the mass action law to describe the ion-exchange equilibrium data (Eqs.…”

Section: Resultsmentioning

confidence: 98%

“…Beyond that, using the mass action law to describe the ion-exchange equilibrium data (Eqs. 3-7), the following selectivity constants were obtained [1,18,30] a Zn Na ¼ 11, a H Na ¼ 22, for the sulfonic groups. The metal affinity towards the P. canaliculata biomass decreases in the following order: Pb > Cu > Zn > Cd.…”

Section: Resultsmentioning

confidence: 99%

“…Such a complex chemical structure enables a number of mechanisms to be involved in the metal sorption process, mainly ion-exchange with Na + , K + , Ca 2+ , Mg 2+ and H + [16,17]. For example, the brown seaweed Pelvetia canaliculata (Phaeophyceae) behaves as a natural cation exchanger, showing a high metal uptake capacity for Cu 2+ , Cd 2+ , Zn 2+ and Cd 2+ , mainly associated to weakly acidic (carboxylic groups) and strongly acidic (sulfonic groups) functional groups [1,18,19]. Different others macroalgae species, such as Gelidium sesquipedale, Sargassum fluitans, Ascophyllum nodosum, Caulerpa lentillifera, Sargassum muticum showed to be good biosorbents for the uptake of Cd 2+ , Pb 2+ , Zn 2+ and Cu 2+ from single and multicomponent mixtures in aqueous solutions [4,[20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Ion-exchange breakthrough curves for single and multi-metal systems using marine macroalgae Pelvetia canaliculata as a natural cation exchanger

Hackbarth

Girardi

Santos

et al. 2015

Chemical Engineering Journal

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ion-exchange breakthrough curves for single and multi-metal systems using marine macroalgae Pelvetia canaliculata as a natural cation exchanger

Hackbarth

Girardi

Santos

et al. 2015

Chemical Engineering Journal

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“…Hackbarth et al (2014) and Girardi et al (2014) reported a total of acidic binding sites of 2.5 mEq/g (Carboxylic: 1.5 mEq/g; Sulfonic: 1.0 mEq/g). Beyond that, using a mass action law to describe the ion-exchange equilibrium data, the following selectivity constants were obtained: , , , , for carboxylic groups and , , , , for sulfonic groups.…”

Section: Resultsmentioning

confidence: 99%

Ion-Exchange Breakthrough Curves for Single and Multi-Metal Systems Using Marine Macroalgae Pelvetia Canaliculata as a Natural Cation Exchanger

Hackbarth¹,

Girardi²,

Santos³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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-In this work, the single and multi-metal ion exchange, Na + /Cu 2+ /Zn 2+ , has been studied in a continuous mode using a fixed-bed column packed with Na-loaded macroalgae Pelvetia canaliculata as the cation exchanger. The breakthrough curves for all the systems studied were obtained using initial metal concentrations of 20 mg/L. A mass transfer model, including the mass balance to the packed bed column, mass balance to the thin plates algae particles, assuming a LDF model, and complementary equations (as mass action law equilibrium relations, initial and boundary equations), was able to fit well the experimental data. An overshoot in the outlet of Cd and Zn concentrations was observed for the multi-metal system and explained by competitive uptake with Pb and Cu ions. Desorption using 0.1 M HNO 3 as eluent was fast and effective. Finally, an ion-exchange pilot plant was tested for the treatment of a multi-metal synthetic solution using the natural macroalgae.

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“…2 Muitos desses corantes são tóxicos e se acumulam na cadeia alimentar aquática dos ecossistemas causando efeitos carcinogênicos, mutagênico e teratogênico nos microrganismos, peixes e seres humanos. 3,4 Dentre essas substâncias tóxicas estão os corantes azo, os quais apresentam o grupo (-N=N-) substituído em anéis aromáticos e que são altamente resistentes à biodegradação. 5,6 Na retirada desses corantes tóxicos dos efluentes industriais são aplicados vários métodos como adsorção, coagulação, processos oxidativos e separação por membrana.…”

Section: Introductionunclassified

Adsorptive Potential of Residue from Industrial Production Process of Metallic Silicon

Ramos¹,

Pavao²,

Barra³

et al. 2017

Rev. Virtual Quim.

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Abstract:In this study, the adsorption capacity of the industrial residue from the metallic silicon production process (adsorbent) in front of the methyl orange dye (adsorbate) was investigated by applying adsorption isotherms. Among the factors that influence the adsorption process, point of zero charge, the particle size and the chemical composition of the adsorbent were investigated. The mechanism of the kinetic adsorption process was evaluated using linear models of pseudo-first-order, pseudo-second-order and Weber-Morris. The adsorption equilibrium characteristics were determined by applying the Freundlich, Tempkin and Dubinin-Radushkevich adsorption isotherm models. The kinetics adsorption follows a mechanism that is characteristic of a pseudo-second-order reaction and for the equilibrium isotherms models investigated, the empirical model of Dubinin-Radushkevich was the one that best fit the experimental data.Keywords: Adsorption; Methyl orange; Spectrophotometry; Residue. ResumoNeste estudo foi investigada a capacidade de adsorção do resíduo industrial proveniente do processo de produção do silício metálico (adsorvente) frente ao corante alaranjado de metila (adsorvato) aplicando-se isotermas de adsorção. Dentre os fatores que influenciam o processo de adsorção foram investigados o ponto de carga zero, a granulometria e a composição química do adsorvente. O mecanismo do processo cinético de adsorção foi avaliado utilizando-se modelos lineares de pseudo primeira-ordem, pseudo segunda-ordem e WeberMorris. As características do equilíbrio de adsorção foram determinadas aplicando-se os modelos de isotermas de adsorção de Freundlich, Tempkin e Dubinin-Radushkevich. O estudo da cinética de adsorção demonstrou que a adsorção segue um mecanismo característico de uma reação de pseudo segunda-ordem e dentre os modelos de isotermas de equilíbrio investigados, o modelo empírico de Dubinin-Radushkevich foi o que melhor se ajustou aos dados experimentais.

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Marine macroalgae Pelvetia canaliculata (Linnaeus) as natural cation exchanger for metal ions separation: A case study on copper and zinc ions removal

Cited by 49 publications

References 56 publications

Ion-exchange breakthrough curves for single and multi-metal systems using marine macroalgae Pelvetia canaliculata as a natural cation exchanger

Ion-exchange breakthrough curves for single and multi-metal systems using marine macroalgae Pelvetia canaliculata as a natural cation exchanger

Ion-Exchange Breakthrough Curves for Single and Multi-Metal Systems Using Marine Macroalgae Pelvetia Canaliculata as a Natural Cation Exchanger

Adsorptive Potential of Residue from Industrial Production Process of Metallic Silicon

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