The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend
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...
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| Language: | English |
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Environmental Technology & Innovation
2021
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| Online Access: | https://www.sciencedirect.com/science/article/abs/pii/S2352186421001760?via%3Dihub https://dlib.phenikaa-uni.edu.vn/handle/PNK/3308 https://doi.org/10.1016/j.eti.2021.101528 |
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oai:localhost:PNK-33082022-08-17T05:54:46Z The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend Phong Thanh Vo Huu The Nguyen Hai Thi Trinh Viet Minh Nguyen Anh-Tuan Le Huy QuangTran Thuy Thi Thu Nguyen Urea Slow-release fertilizer 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. 2021-10-27T02:05:06Z 2021-10-27T02:05:06Z 2021 Bài trích https://www.sciencedirect.com/science/article/abs/pii/S2352186421001760?via%3Dihub https://dlib.phenikaa-uni.edu.vn/handle/PNK/3308 https://doi.org/10.1016/j.eti.2021.101528 en Environmental Technology & Innovation |
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Digital Phenikaa |
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Digital Phenikaa |
| language |
English |
| topic |
Urea Slow-release fertilizer |
| spellingShingle |
Urea Slow-release fertilizer Phong Thanh Vo Huu The Nguyen Hai Thi Trinh Viet Minh Nguyen Anh-Tuan Le Huy QuangTran Thuy Thi Thu Nguyen The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend |
| description |
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. |
| format |
Bài trích |
| author |
Phong Thanh Vo Huu The Nguyen Hai Thi Trinh Viet Minh Nguyen Anh-Tuan Le Huy QuangTran Thuy Thi Thu Nguyen |
| author_facet |
Phong Thanh Vo Huu The Nguyen Hai Thi Trinh Viet Minh Nguyen Anh-Tuan Le Huy QuangTran Thuy Thi Thu Nguyen |
| author_sort |
Phong Thanh Vo |
| 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/3308 https://doi.org/10.1016/j.eti.2021.101528 |
| _version_ |
1751856270026997760 |
| score |
8.891145 |