Effects of pH and crosslinking agent in the evaluation of hydrogels as potential nitrate-controlled release systems
Ficheros
Identificadores
Compartir
Metadatos
Mostrar el registro completo del ítemAutor
Ureña Amate, María Dolores; Socías Viciana, María Del Mar; Urbano Juan, Mª del Mar; GARCIA ALCARAZ, MARIA DEL CARMENFecha
2023-02-28Resumen
Water scarcity and the loss of fertilizer from agricultural soils through runoff, which also leads to contamination of other areas, are increasingly common problems in agriculture. To mitigate nitrate water pollution, the technology of controlled release formulations (CRFs) provides a promising alternative for improving the management of nutrient supply and decreasing environmental pollution while maintaining good quality and high crop yields. This study describes the influence of pH and crosslinking agent, ethylene glycol dimethacrylate (EGDMA) or N,N′-methylenebis (acrylamide) (NMBA), on the behavior of polymeric materials in swelling and nitrate release kinetics. The characterization of hydrogels and CRFs was performed by FTIR, SEM, and swelling properties. Kinetic results were adjusted to Fick, Schott, and a novel equation proposed by the authors. Fixed-bed experiments were carried out by using the NMBA systems, coconut fiber, and commercial KNO3. Results showed that on the one han...
Palabra/s clave
hydrogels
controlled release
NMBA
EGDMA
column experiments
fertilizer