Development and characterization of a new adsorbent based on Jerivá coconut (Syagrus romanzoffiana) applied for removing toxic metals from water

Pigatto, Joceane; Brandler, Danieli; Tochetto, Gabriel André; Memlak, D. M.; Vargas, Gean Delise Leal Pasquali; Alves, Alcione Aparecida de Almeida; Moroni, Liziane Schittler; Kempka, Aniela Pinto; Luz, Cleuzir da; Dervanoski, Adriana

doi:10.5004/dwt.2020.25893

Cited by 7 publications

(3 citation statements)

References 56 publications

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“…The precursor material used to develop the adsorbent is Jerivá coconut, harvested during the green phase of the Syagrus romanzo ana plant, in the state of RS, Brazil. The characteristics of this biomass have already been investigated in other works (Coimbra and Jorge 2011;Moreira et al 2013;Pigatto et al 2020). The activating agent used was phosphoric acid (H 3 PO 4 ) at a concentration of 40%.…”

Section: Chemicals and Materialsmentioning

confidence: 99%

“…This biomass, after thermal and chemical treatments, has the potential to be used as an adsorbent applied to water treatment. Recently, the use of activated carbon produced from this biomass has been reported in the removal of metallic ions (Pigatto et al 2020), herbicides (Salomón et al 2021) or antibiotics (Carvalho et al 2019) dissolved in the aqueous phase. The results of the studies were promising and, therefore, the evaluation of this new adsorbent in the separation of other contaminants in the aqueous phase and the understanding of the mechanisms involved is of great scienti c and technological interest.…”

Section: Introductionmentioning

confidence: 99%

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Highly efficient biosorbent produced from Syagrus romanzoffiana to be applied in water treatment

Tochetto

Silva

Bampi

et al. 2021

Preprint

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A new adsorbent from Jerivá coconut (a native fruit of the Atlantic Forest) was developed through thermal activation at high temperatures and chemical activation using H3PO4. The characterization of activated carbon revealed the functional groups O-H, NH2 and C=C. The morphology showed an irregular and heterogeneous surface, with a pore volume of 0.442 cm3 g−1 and a surface area of 750 m2 g−1. The main variables of the process were evaluated for statistical significance in the removal of the methylene blue dye showing that only the agitation of the system affected the process. Adsorption kinetics were performed at three different concentrations and fitted to nonlinear models where the Avrami-fractional-order model represented the experimental data. Equilibrium occurred within 80 min and was sufficient to remove more than 99% of the initial concentration. The sorption isotherms were performed at four different temperatures, fitted to four nonlinear models. The Sips model obtained the best adjustment, with a maximum adsorption capacity of 254.40 mg g−1, for the highest temperature investigated. The process occurred spontaneously, favorably and endothermically. The results were promising, pointing out that this adsorbent has the potential to remove methylene blue and the treated effluent can be reused for less noble purposes in the industry.

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Section: Chemicals and Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly efficient biosorbent produced from Syagrus romanzoffiana to be applied in water treatment

Tochetto

Silva

Bampi

et al. 2021

Preprint

Self Cite

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show abstract

“…A principal brecha científica se concentra na exploração de adsorventes alternativos ao carvão ativado, capazes de descontaminar águas com eficiência (Babel et al, 2003;Dotto e Mckay, 2020;Joseph et al, 2019;Tan et al, 2020). Diversos materiais já foram extensivamente explorados para síntese de adsorventes aplicados na adsorção de íons metálicos, como carvões ativados (Sultana et al, 2022;Pigatto et al, 2020), zeólitas (Mo et al, 2022;Medykowska et al, 2022), quitosanas (Zhang et al, 2021;Jiang et al, 2022) e biochars (Xu et al, 2022;Liu e Zhang, 2022). No entanto, os estudos empregando geopolímeros como adsorventes têm se mostrado interessantes, devido à eficiência nos resultados obtidos quanto à remoção de diferentes contaminantes presentes em águas.…”

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Geopolímeros Porosos São Adsorventes Alternativos Para a Adsorção De Metais Pesados? Análise Das Recentes Descobertas

Marcon,

Tochetto,

Dervanoski

et al. 2023

Rev. AIDIS ing. cienc. ambient.

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Atualmente, têm se dado maior atenção à contaminação de recursos hídricos por diferentes categorias de compostos, por este se tratar de um recurso essencial à vida. Desta forma, o presente trabalho realizou um estudo bibliográfico referente à síntese de geopolímeros (GPs), através de diversos materiais e metodologias, com aplicação para a adsorção de metais pesados, abordando a questão de modificações realizadas na síntese dos GPs, visando obter a potencialização de suas características de adsorção. Constatou-se que para a síntese dos GPs não há um padrão, ou seja, podem ser usados um número variado de materiais precursores, ativadores alcalinos, tempos e temperaturas de cura, com recipientes selados ou não e optar por diferentes tamanhos de partículas para utilização no processo de adsorção. Também, pode ser feito uso de agentes criadores de poros, ou modificações realizadas durante a síntese dos materiais visando atribuir as características desejadas aos GPs. A utilização de GPs como adsorventes com o objetivo de remover metais pesados, mostrou-se eficaz e com perspectivas de aplicação para diversos íons metálicos (Ni, Pb, Cu, Hg, Cd, Cr, Zn, Cs).

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Kinetic modeling of the adsorption and desorption of metallic ions present in effluents using the biosorbent obtained from Syagrus romanzoffiana

Tochetto

Brandler

Pigatto

et al. 2023

Environ Monit Assess

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Development and characterization of a new adsorbent based on Jerivá coconut (Syagrus romanzoffiana) applied for removing toxic metals from water

Cited by 7 publications

References 56 publications

Highly efficient biosorbent produced from Syagrus romanzoffiana to be applied in water treatment

Highly efficient biosorbent produced from Syagrus romanzoffiana to be applied in water treatment

Geopolímeros Porosos São Adsorventes Alternativos Para a Adsorção De Metais Pesados? Análise Das Recentes Descobertas

Kinetic modeling of the adsorption and desorption of metallic ions present in effluents using the biosorbent obtained from Syagrus romanzoffiana

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