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Adsorptive removal of Co(II) in aqueous solutions using clearing nut seed powder

The present study assessed the potential use of clearing nut seed powder (Strychnos potatorum) as an adsorbent for the removal of Co(II) ions from aqueous solutions. Based on FTIR analysis, the adsorbent possesses hydroxyl, C-N, and C-O functional groups and SEM analysis indicated the presence of un...

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Autores principales: Ranaweera, Kavitha H., Godakumbura, Pahan I., Perera, B. Asiri
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7132072/
https://www.ncbi.nlm.nih.gov/pubmed/32274433
http://dx.doi.org/10.1016/j.heliyon.2020.e03684
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author Ranaweera, Kavitha H.
Godakumbura, Pahan I.
Perera, B. Asiri
author_facet Ranaweera, Kavitha H.
Godakumbura, Pahan I.
Perera, B. Asiri
author_sort Ranaweera, Kavitha H.
collection PubMed
description The present study assessed the potential use of clearing nut seed powder (Strychnos potatorum) as an adsorbent for the removal of Co(II) ions from aqueous solutions. Based on FTIR analysis, the adsorbent possesses hydroxyl, C-N, and C-O functional groups and SEM analysis indicated the presence of uneven porous surface structure, which is important for adsorption. Batch adsorption studies were performed to investigate the effect of contact time, initial pH, initial Co(II) concentration, adsorbent dosage, and temperature on adsorption. The Langmuir isotherm model provided the best explanation to experimental data with the highest correlation coefficient and the maximum monolayer adsorption capacity obtained was 4.245 mg/g. The pseudo-second-order kinetic model fitted well with the adsorption kinetic data. Sorption thermodynamic data showed that the adsorption process is spontaneous and exothermic in nature. The clearing nut seed powder obtained after surface modification by acid treatment showed a higher adsorption capacity.
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spelling pubmed-71320722020-04-09 Adsorptive removal of Co(II) in aqueous solutions using clearing nut seed powder Ranaweera, Kavitha H. Godakumbura, Pahan I. Perera, B. Asiri Heliyon Research Article The present study assessed the potential use of clearing nut seed powder (Strychnos potatorum) as an adsorbent for the removal of Co(II) ions from aqueous solutions. Based on FTIR analysis, the adsorbent possesses hydroxyl, C-N, and C-O functional groups and SEM analysis indicated the presence of uneven porous surface structure, which is important for adsorption. Batch adsorption studies were performed to investigate the effect of contact time, initial pH, initial Co(II) concentration, adsorbent dosage, and temperature on adsorption. The Langmuir isotherm model provided the best explanation to experimental data with the highest correlation coefficient and the maximum monolayer adsorption capacity obtained was 4.245 mg/g. The pseudo-second-order kinetic model fitted well with the adsorption kinetic data. Sorption thermodynamic data showed that the adsorption process is spontaneous and exothermic in nature. The clearing nut seed powder obtained after surface modification by acid treatment showed a higher adsorption capacity. Elsevier 2020-04-02 /pmc/articles/PMC7132072/ /pubmed/32274433 http://dx.doi.org/10.1016/j.heliyon.2020.e03684 Text en © 2020 Published by Elsevier Ltd. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Research Article
Ranaweera, Kavitha H.
Godakumbura, Pahan I.
Perera, B. Asiri
Adsorptive removal of Co(II) in aqueous solutions using clearing nut seed powder
title Adsorptive removal of Co(II) in aqueous solutions using clearing nut seed powder
title_full Adsorptive removal of Co(II) in aqueous solutions using clearing nut seed powder
title_fullStr Adsorptive removal of Co(II) in aqueous solutions using clearing nut seed powder
title_full_unstemmed Adsorptive removal of Co(II) in aqueous solutions using clearing nut seed powder
title_short Adsorptive removal of Co(II) in aqueous solutions using clearing nut seed powder
title_sort adsorptive removal of co(ii) in aqueous solutions using clearing nut seed powder
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7132072/
https://www.ncbi.nlm.nih.gov/pubmed/32274433
http://dx.doi.org/10.1016/j.heliyon.2020.e03684
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