Evaluation Of Parameters Governing The Release Rate Of Phosphate Ions From Chitosan-Coated Phosphorus Fertilizer Pellets

Coated fertilizers, which belong to the group of controlled-release fertilizer (CRF) have been widely used in agricultural field in order to reduce the ground water pollution and at the same time increase the nutrient use efficiency by crops. Chitosan is one of promising biopolymers that can be used...

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Main Author:	Ahmad, Nor Naimah Rosyadah
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TP1-1185 Chemical technology
Online Access:	http://eprints.usm.my/43872/1/Nor%20Naimah%20Rosyadah%20Binti%20Ahmad24.pdf
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id	my-usm-ep.43872
record_format	uketd_dc
spelling	my-usm-ep.438722019-04-12T05:26:11Z Evaluation Of Parameters Governing The Release Rate Of Phosphate Ions From Chitosan-Coated Phosphorus Fertilizer Pellets 2013-06 Ahmad, Nor Naimah Rosyadah TP1-1185 Chemical technology Coated fertilizers, which belong to the group of controlled-release fertilizer (CRF) have been widely used in agricultural field in order to reduce the ground water pollution and at the same time increase the nutrient use efficiency by crops. Chitosan is one of promising biopolymers that can be used as a coating material in order to control the release rate of nutrients from fertilizer pellets due to its excellent properties. Most of the previous studies based on the chitosan coating were focused on the urea and compound fertilizers of nitrogen-phosphorus-potassium (NPK). Studies regarding the chitosan-coated phosphorus fertilizers have not been addressed so far. Furthermore, previous studies also neglected the evaluation of parameters that govern the nutrient release rate using the mechanistic model. Understanding the transport parameters such as diffusion coefficient of nutrient through coated pellet is very important in order to improve the design of fertilizers. This study is mainly focused on investigating the release rate of phosphate ions from the chitosan-coated phosphorus fertilizer pellets and evaluation of parameters that controlled the nutrient release using mechanistic model. Appropriate experiments were carried out in order to determine the phosphate ions release rate from pellets with different number of chitosan coating layers (one, two and three layers) under variation of pH conditions (pH 5.7, 7.1 and 8.5). Experiments were also conducted for short and long period of release tests. 2013-06 Thesis http://eprints.usm.my/43872/ http://eprints.usm.my/43872/1/Nor%20Naimah%20Rosyadah%20Binti%20Ahmad24.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TP1-1185 Chemical technology
spellingShingle	TP1-1185 Chemical technology Ahmad, Nor Naimah Rosyadah Evaluation Of Parameters Governing The Release Rate Of Phosphate Ions From Chitosan-Coated Phosphorus Fertilizer Pellets
description	Coated fertilizers, which belong to the group of controlled-release fertilizer (CRF) have been widely used in agricultural field in order to reduce the ground water pollution and at the same time increase the nutrient use efficiency by crops. Chitosan is one of promising biopolymers that can be used as a coating material in order to control the release rate of nutrients from fertilizer pellets due to its excellent properties. Most of the previous studies based on the chitosan coating were focused on the urea and compound fertilizers of nitrogen-phosphorus-potassium (NPK). Studies regarding the chitosan-coated phosphorus fertilizers have not been addressed so far. Furthermore, previous studies also neglected the evaluation of parameters that govern the nutrient release rate using the mechanistic model. Understanding the transport parameters such as diffusion coefficient of nutrient through coated pellet is very important in order to improve the design of fertilizers. This study is mainly focused on investigating the release rate of phosphate ions from the chitosan-coated phosphorus fertilizer pellets and evaluation of parameters that controlled the nutrient release using mechanistic model. Appropriate experiments were carried out in order to determine the phosphate ions release rate from pellets with different number of chitosan coating layers (one, two and three layers) under variation of pH conditions (pH 5.7, 7.1 and 8.5). Experiments were also conducted for short and long period of release tests.
format	Thesis
qualification_level	Master's degree
author	Ahmad, Nor Naimah Rosyadah
author_facet	Ahmad, Nor Naimah Rosyadah
author_sort	Ahmad, Nor Naimah Rosyadah
title	Evaluation Of Parameters Governing The Release Rate Of Phosphate Ions From Chitosan-Coated Phosphorus Fertilizer Pellets
title_short	Evaluation Of Parameters Governing The Release Rate Of Phosphate Ions From Chitosan-Coated Phosphorus Fertilizer Pellets
title_full	Evaluation Of Parameters Governing The Release Rate Of Phosphate Ions From Chitosan-Coated Phosphorus Fertilizer Pellets
title_fullStr	Evaluation Of Parameters Governing The Release Rate Of Phosphate Ions From Chitosan-Coated Phosphorus Fertilizer Pellets
title_full_unstemmed	Evaluation Of Parameters Governing The Release Rate Of Phosphate Ions From Chitosan-Coated Phosphorus Fertilizer Pellets
title_sort	evaluation of parameters governing the release rate of phosphate ions from chitosan-coated phosphorus fertilizer pellets
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Kimia
publishDate	2013
url	http://eprints.usm.my/43872/1/Nor%20Naimah%20Rosyadah%20Binti%20Ahmad24.pdf
_version_	1747821293993984000

Evaluation Of Parameters Governing The Release Rate Of Phosphate Ions From Chitosan-Coated Phosphorus Fertilizer Pellets

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