Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Synthesis and Characterization of Slow-Release Fertilizer Hydrogels Based on Hydroxy Propyl Methyl Cellulose, Polyvinyl Alcohol, Glycerol and Blended Paper as Second Layer

Version 1 : Received: 16 October 2021 / Approved: 22 October 2021 / Online: 22 October 2021 (09:48:48 CEST)

How to cite: Andrew, F.P.; Gungula, D.T.; Kareem, S.A.; Saddiq, A.M.; Adebayo, E.F.; Dare, I.; Tame, V.T.; Haruna, K.M.; Onoja, P.D.; Joseph, J. Synthesis and Characterization of Slow-Release Fertilizer Hydrogels Based on Hydroxy Propyl Methyl Cellulose, Polyvinyl Alcohol, Glycerol and Blended Paper as Second Layer. Preprints 2021, 2021100323 (doi: 10.20944/preprints202110.0323.v1). Andrew, F.P.; Gungula, D.T.; Kareem, S.A.; Saddiq, A.M.; Adebayo, E.F.; Dare, I.; Tame, V.T.; Haruna, K.M.; Onoja, P.D.; Joseph, J. Synthesis and Characterization of Slow-Release Fertilizer Hydrogels Based on Hydroxy Propyl Methyl Cellulose, Polyvinyl Alcohol, Glycerol and Blended Paper as Second Layer. Preprints 2021, 2021100323 (doi: 10.20944/preprints202110.0323.v1).

Abstract

In this study, a slow-release urea fertilizer hydrogel was synthesized from hydroxyl propyl methyl cellulose, polyvinyl alcohol and glycerol blends with paper (blended paper) as second layer. The fertilizer hydrogel was characterized by SEM, XRD and FTIR. Its retention in sandy soil, swelling behavior in distilled and tap water as well as slow-release behavior to urea were investigated. The results indicated that the fertilizer had good slow-release properties and ability to retain water in soil. However, the addition of blended paper as a second layer matrix was found to help improve the release properties of the fertilizer. The swelling kinetic of the hydrogel followed the Schott’s Second order model. The release kinetics of urea in water was best described by the Zero order model signifying that the release behavior was independent of fertilizer concentration

Keywords

Hydrogel; Blended paper; Slow-release fertilizer; Hydroxy Propyl Methyl Cellulose; polyvinyl alcohol

Subject

CHEMISTRY, Chemical Engineering

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