Encapsulated Urea-Kaolinite Nanocomposite for Controlled Release Fertilizer Formulations

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dc.creatorSempeho, Siafu Ibahati
dc.creatorKim, Hee Taik
dc.creatorMubofu, Egid
dc.creatorPogrebnoi, Alexander
dc.creatorShao, Godlisten
dc.creatorHilonga, Askwar
dc.date2019-05-22T07:21:23Z
dc.date2019-05-22T07:21:23Z
dc.date2015
dc.date.accessioned2022-10-25T09:24:34Z
dc.date.available2022-10-25T09:24:34Z
dc.descriptionResearch Article published by Hindawi Publishing Corporation Journal of Chemistry
dc.descriptionUrea controlled release fertilizer (CRF) was prepared via kaolinite intercalation followed by gum arabic encapsulation in an attempt to reduce its severe losses associated with dissolution, hydrolysis, and diffusion. Following the beneficiation, the nonkaolinite fraction decreased from 39.58% to 0.36% whereas the kaolinite fraction increased from 60.42% to 99.64%. The X-ray diffractions showed that kaolinite was a major phase with FCC Bravais crystal lattice with particle sizes ranging between 14.6nm and 92.5 nm. Theparticle size varied with intercalation ratioswithmethanol intercalated kaolinite >DMSO-kaolinite > urea-kaolinite (KPDMU). Following intercalation, SEM analysis revealed a change of order from thick compact overlapping euhedral pseudohexagonal platelets to irregular booklets which later transformed to vermiform morphology and dispersed euhedral pseudohexagonal platelets. Besides, dispersed euhedral pseudohexagonal platelets were seen to coexist with blocky-vermicular booklets. In addition, a unique brain-form agglomeration which transformed into roundish particles mart was observed after encapsulation. The nanocomposites decomposed between 48 and 600∘C. Release profiles showed that 100% of urea was released in 97 hours from KPDMU while 87% was released in 150 hours from the encapsulated nanocomposite.The findings established that it is possible to use Pugu kaolinite and gum arabic biopolymer to prepare urea CRF formulations.
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dc.identifierhttp://dx.doi.org/10.1155/2015/237397
dc.identifierhttp://dspace.nm-aist.ac.tz/handle/123456789/137
dc.identifier.urihttp://hdl.handle.net/123456789/95571
dc.languageen_US
dc.publisherHindawi Publishing Corporation Journal of Chemistry
dc.subjectResearch Subject Categories::FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING
dc.titleEncapsulated Urea-Kaolinite Nanocomposite for Controlled Release Fertilizer Formulations
dc.typeArticle

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