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DC Field | Value | Language |
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dc.contributor.author | Eghbali Babadi, F | - |
dc.contributor.author | Yunus, R | - |
dc.contributor.author | Masoudi Soltani, S | - |
dc.contributor.author | Shotipruk, A | - |
dc.date.accessioned | 2022-03-27T14:43:09Z | - |
dc.date.available | 2022-03-27T14:43:09Z | - |
dc.date.issued | 2021-04-19 | - |
dc.identifier | ORCID iD: Salman Masoudi Soltani https://orcid.org/0000-0002-5983-0397 | - |
dc.identifier.citation | Eghbali Babadi, F., Yunus, R., Masoudi Soltani, S. and Shotipruk, A. (2021) 'Release Mechanisms and Kinetic Models of Gypsum–Sulfur–Zeolite-Coated Urea Sealed with Microcrystalline Wax for Regulated Dissolution', ACS Omega, 6 (17), pp. 11144-11154 (11). doi: 10.1021/acsomega.0c04353. | en_US |
dc.identifier.uri | https://bura.brunel.ac.uk/handle/2438/24342 | - |
dc.description | Supporting Information: The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsomega.0c04353. Release of nitrogen content from uncoated urea and commercial sulfur-coated urea (SCU) determined by the HPLC method and the Kjedhal method (PDF). | en_US |
dc.description.abstract | Copyright © 2021 The Authors. In this study, a mineral-based coated urea was fabricated in a rotary pan coater using a mixture of gypsum/sulfur/zeolite (G25S25Z50) as an effective and low-cost coating material. The effects of different coating compositions on the dissolution rate of urea and the crushing strength and morphology of the coated urea were investigated. A 25:25:50 (wt %) mixture of gypsum/sulfur/zeolite (G25S25Z50) increased the coating effectiveness to 34.1% with the highest crushing strength (31.06 N). The effectiveness of coated urea was further improved to 46.6% with the addition of a microcrystalline wax (3%) as a sealant. Furthermore, the release mechanisms of various urea fertilizers were determined by fitting the release profiles with six mathematical models, namely, the zeroth-order, first-order, second-order, Higuchi, Ritger & Peppas, and Kopcha models. The results showed that the release mechanism of the uncoated urea and all other coated urea followed the Ritger & Peppas model, suggesting the diffusional release from nonswellable delivery systems. In addition, due to the increased mass-transfer resistance, the kinetic constant was decreased from 0.2233 for uncoated urea to 0.1338 for G25S25Z50-coated urea and was further decreased to 0.0985 when 3% Witcovar 146 sealant was applied. | en_US |
dc.description.sponsorship | Rachadapisaek Sompot Fund, Chulalongkorn University, for the postdoctoral fellowship; Petronas Company; Universiti Putra Malaysia. | en_US |
dc.format.extent | 11144 - 11154 (11) | - |
dc.format.medium | Electronic | - |
dc.language.iso | en_US | en_US |
dc.publisher | American Chemical Society | en_US |
dc.rights | Copyright © 2021 The Authors. Published by American Chemical Society under a Creative Commons Attribution License (https://creativecommons.org/licenses/by-nc-nd/4.0/). | - |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | - |
dc.title | Release Mechanisms and Kinetic Models of Gypsum-Sulfur-Zeolite-Coated Urea Sealed with Microcrystalline Wax for Regulated Dissolution | en_US |
dc.type | Article | en_US |
dc.identifier.doi | https://doi.org/10.1021/acsomega.0c04353 | - |
dc.relation.isPartOf | ACS Omega | - |
pubs.issue | 17 | - |
pubs.publication-status | Published | - |
pubs.volume | 6 | - |
dc.identifier.eissn | 2470-1343 | - |
dc.rights.holder | The Authors | - |
Appears in Collections: | Dept of Chemical Engineering Research Papers |
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