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The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend

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Main Author: Vo, Phong Thanh
Other Authors: Nguyen, Huu The
Format: Article
Language:English
Published: Environmental Technology & Innovation 2021
Subjects:
Slow-release fertilizer
Urea
CS/PVA blend
Cross-linking
Online Access:https://www.sciencedirect.com/science/article/abs/pii/S2352186421001760?via%3Dihub#!
https://dlib.phenikaa-uni.edu.vn/handle/PNK/1849
https://doi.org/10.1016/j.eti.2021.101528
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spelling oai:localhost:PNK-18492022-08-17T05:54:41Z The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend Vo, Phong Thanh Nguyen, Huu The Trinh, Hai Thi Nguyen, Viet Minh Le, Anh-Tuan Tran, Huy Quang Nguyen, Thuy Thi Thu Slow-release fertilizer Urea CS/PVA blend Cross-linking Q1 For mitigating environmental pollution caused by excess usage of urea fertilizer, this paper reports a new fertilizer formulation, based on urea incorporating chitosan (CS) and poly (vinyl alcohol) (PVA) blend, for the slow release of urea. The urea/CS/PVA formulations were prepared by cross-linking CS and PVA blend in the presence of urea with glutaraldehyde as a cross-linker. The results indicated an interaction between urea and the functional groups of CS and PVA through hydrogen bonding, which has significant effects on the thermal properties of urea/CS/PVA formulation. The surface morphology of urea/CS/PVA formulations showed that the quantity of urea crystals anchored on the surface increased with the contents of urea and the cross-linking agent. Urea/CS/PVA formulations with a high degree of cross-linking had low water absorbency in the early stage. Meanwhile, they improved hydrolytic stability in the latter stage upon being immersed in water. The sustained release of urea from urea/CS/PVA formulations was prolonged to 10 days. The amount of urea released from urea/CS/PVA formulation with low urea contents followed the first order and Hixson–Crowell models. In contrast, urea/CS/PVA formulation with high urea contents fitted well to the Higuchi and Korsmeyer–Peppas​ models. This study provides a simple process to produce urea/CS/PVA formulation, a potential slow-release fertilizer used in agriculture to minimize adverse environmental and economic impacts. 2021-06-18T02:23:37Z 2021-06-18T02:23:37Z 2021 Article Working Paper https://www.sciencedirect.com/science/article/abs/pii/S2352186421001760?via%3Dihub#! https://dlib.phenikaa-uni.edu.vn/handle/PNK/1849 https://doi.org/10.1016/j.eti.2021.101528 en Environmental Technology & Innovation
institution Digital Phenikaa
collection Digital Phenikaa
language English
topic Slow-release fertilizer
Urea
CS/PVA blend
Cross-linking
spellingShingle Slow-release fertilizer
Urea
CS/PVA blend
Cross-linking
Vo, Phong Thanh
The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend
description Q1
author2 Nguyen, Huu The
author_facet Nguyen, Huu The
Vo, Phong Thanh
format Article
author Vo, Phong Thanh
author_sort Vo, Phong Thanh
title The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend
title_short The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend
title_full The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend
title_fullStr The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend
title_full_unstemmed The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend
title_sort nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend
publisher Environmental Technology & Innovation
publishDate 2021
url https://www.sciencedirect.com/science/article/abs/pii/S2352186421001760?via%3Dihub#!
https://dlib.phenikaa-uni.edu.vn/handle/PNK/1849
https://doi.org/10.1016/j.eti.2021.101528
_version_ 1751856296384004096
score 8.887836

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