The use of slow release fertilizer has become a new trend to save fertilizer consumption and to minimize environmentalpollution. Due to its polymeric cationic, biodegradable, bioabsorbable, and bactericidal characteristics, chitosan(CS) nanoparticle is an interesting material for use in controlled release systems. However, there are no attempts to explorethe potential of chitosan nanoparticles as controlled release for NPK fertilizers. In this work chitosan nanoparticles wereobtained by polymerizing methacrylic acid for the incorporation of NPK fertilizers. The interaction and stability of chitosannanoparticle suspensions containing nitrogen (N), phosphorus (P) and potassium (K) were evaluated by FTIR spectroscopy,particle size analysis and zeta-potential. The FTIR results indicated the existence of electrostatic interactions between chitosannanoparticles and the elements N, P and K. The stability of the CS-PMAA colloidal suspension was higher with theaddition of nitrogen and potassium than with the addition of phosphorus, due to the higher anion charge from the calciumphosphate than the anion charges from the potassium chloride and urea. The mean diameter increase of the CS-PMAAnanoparticles in suspension with the addition of different compounds indicated that the elements are being aggregated onthe surface of the chitosan nanoparticles.
The use of slow release fertilizer has become a new trend to save fertilizer consumption and to minimize environmentalpollution. Due to its polymeric cationic, biodegradable, bioabsorbable, and bactericidal characteristics, chitosan(CS) nanoparticle is an interesting material for use in controlled release systems. However, there are no attempts to explorethe potential of chitosan nanoparticles as controlled release for NPK fertilizers. In this work chitosan nanoparticles wereobtained by polymerizing methacrylic acid for the incorporation of NPK fertilizers. The interaction and stability of chitosannanoparticle suspensions containing nitrogen (N), phosphorus (P) and potassium (K) were evaluated by FTIR spectroscopy,particle size analysis and zeta-potential. The FTIR results indicated the existence of electrostatic interactions between chitosannanoparticles and the elements N, P and K. The stability of the CS-PMAA colloidal suspension was higher with theaddition of nitrogen and potassium than with the addition of phosphorus, due to the higher anion charge from the calciumphosphate than the anion charges from the potassium chloride and urea. The mean diameter increase of the CS-PMAAnanoparticles in suspension with the addition of different compounds indicated that the elements are being aggregated onthe surface of the chitosan nanoparticles.
การแปล กรุณารอสักครู่..
