Kinetic and equilibrium modeling of low-cost adsorbent of untreated watermelon peel for adsorption of zinc(II)
Watermelon peel is a bio-waste, lower cost, readily available, environment-friendly, and has high adsorption capacities. This study investigates the feasibility of dried watermelon peel (WP) as a low-cost adsorbent for removing Zn2+ from the aqueous solution. Batch experiments were conducted at diff...
Published in: | Desalination and Water Treatment |
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Language: | English |
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Desalination Publications
2023
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2-s2.0-85174252055 Taib N.I.; Rosli N.A.; Rejab M.M.; Mehamad Rosdi N.A.F.; Abdul Aziz N.A.; Abd Halim S.N. Kinetic and equilibrium modeling of low-cost adsorbent of untreated watermelon peel for adsorption of zinc(II) 2023 Desalination and Water Treatment 306 10.5004/dwt.2023.29831 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174252055&doi=10.5004%2fdwt.2023.29831&partnerID=40&md5=7d3ef162cff783a43b87183d2b71966c Watermelon peel is a bio-waste, lower cost, readily available, environment-friendly, and has high adsorption capacities. This study investigates the feasibility of dried watermelon peel (WP) as a low-cost adsorbent for removing Zn2+ from the aqueous solution. Batch experiments were conducted at different pH, initial concentrations, and contact times to evaluate dried watermelon peels’ maximum adsorption capacity. The removal of Zn2+ was increased gradually with increasing pH, with the maximum removal observed at pH 5.0. Langmuir’s model isotherm can well explain the equilibrium data for Zn2+ adsorption (R2 = 0.9812). The monolayer adsorption capacity was found to be 20.45 mg/g at an optimum contact time of 1 h. Sorption energy analyses were conducted using Temkin and Dubinin–Radushkevich model isotherm. It was depicted that the sorption energies of Zn2+ on WP fitted well with the Dubinin–Radushkevich isotherm with R2 = 0.918, indicating that the adsorption process is probably physical in nature. The adsorption kinetics shows that the pseudo-second-order equation could best explain the removal of Zn2+. This study shows that the WP can potentially be an alternative low-cost adsorbent to remove Zn2+ from an aqueous solution. © 2023 Desalination Publications. Desalination Publications 19443994 English Article |
author |
Taib N.I.; Rosli N.A.; Rejab M.M.; Mehamad Rosdi N.A.F.; Abdul Aziz N.A.; Abd Halim S.N. |
spellingShingle |
Taib N.I.; Rosli N.A.; Rejab M.M.; Mehamad Rosdi N.A.F.; Abdul Aziz N.A.; Abd Halim S.N. Kinetic and equilibrium modeling of low-cost adsorbent of untreated watermelon peel for adsorption of zinc(II) |
author_facet |
Taib N.I.; Rosli N.A.; Rejab M.M.; Mehamad Rosdi N.A.F.; Abdul Aziz N.A.; Abd Halim S.N. |
author_sort |
Taib N.I.; Rosli N.A.; Rejab M.M.; Mehamad Rosdi N.A.F.; Abdul Aziz N.A.; Abd Halim S.N. |
title |
Kinetic and equilibrium modeling of low-cost adsorbent of untreated watermelon peel for adsorption of zinc(II) |
title_short |
Kinetic and equilibrium modeling of low-cost adsorbent of untreated watermelon peel for adsorption of zinc(II) |
title_full |
Kinetic and equilibrium modeling of low-cost adsorbent of untreated watermelon peel for adsorption of zinc(II) |
title_fullStr |
Kinetic and equilibrium modeling of low-cost adsorbent of untreated watermelon peel for adsorption of zinc(II) |
title_full_unstemmed |
Kinetic and equilibrium modeling of low-cost adsorbent of untreated watermelon peel for adsorption of zinc(II) |
title_sort |
Kinetic and equilibrium modeling of low-cost adsorbent of untreated watermelon peel for adsorption of zinc(II) |
publishDate |
2023 |
container_title |
Desalination and Water Treatment |
container_volume |
306 |
container_issue |
|
doi_str_mv |
10.5004/dwt.2023.29831 |
url |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174252055&doi=10.5004%2fdwt.2023.29831&partnerID=40&md5=7d3ef162cff783a43b87183d2b71966c |
description |
Watermelon peel is a bio-waste, lower cost, readily available, environment-friendly, and has high adsorption capacities. This study investigates the feasibility of dried watermelon peel (WP) as a low-cost adsorbent for removing Zn2+ from the aqueous solution. Batch experiments were conducted at different pH, initial concentrations, and contact times to evaluate dried watermelon peels’ maximum adsorption capacity. The removal of Zn2+ was increased gradually with increasing pH, with the maximum removal observed at pH 5.0. Langmuir’s model isotherm can well explain the equilibrium data for Zn2+ adsorption (R2 = 0.9812). The monolayer adsorption capacity was found to be 20.45 mg/g at an optimum contact time of 1 h. Sorption energy analyses were conducted using Temkin and Dubinin–Radushkevich model isotherm. It was depicted that the sorption energies of Zn2+ on WP fitted well with the Dubinin–Radushkevich isotherm with R2 = 0.918, indicating that the adsorption process is probably physical in nature. The adsorption kinetics shows that the pseudo-second-order equation could best explain the removal of Zn2+. This study shows that the WP can potentially be an alternative low-cost adsorbent to remove Zn2+ from an aqueous solution. © 2023 Desalination Publications. |
publisher |
Desalination Publications |
issn |
19443994 |
language |
English |
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Article |
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record_format |
scopus |
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Scopus |
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1809678477172932608 |