TY - JOUR
T1 - Synthesis of high-efficient low-cost fertilizer carriers based on biodegradable lignin hydrogels
AU - Khan, Abrar Ali
AU - Nayak, Jagdeep Kumar
AU - Amin, Bilal Ul
AU - Muddasar, Muhammad
AU - Culebras, Mario
AU - Ranade, Vivek V.
AU - Collins, Maurice N.
N1 - Publisher Copyright:
© 2024
PY - 2024/11
Y1 - 2024/11
N2 - Conventional fertilizers face environmental and economic challenges due to their high solubility, leading to significant losses via runoff and leachate. This study presents a biodegradable hydrogel, synthesized from lignin and polyvinyl alcohol (PVA), designed as an eco-friendly carrier for struvite (fertilizer) with controlled phosphate release. The hydrogel was analysed through scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Thermogravimetric analysis (TGA) and Differential scanning calorimetry (DSC). Furthermore, the prepared hydrogels demonstrated high water absorption capacities (963.4 %, 706.4 %, and 410 % for LH4, LH8, and LH12, respectively) and exhibited Fickian diffusion behaviour. Phosphate release studies showed a gradual release over 6–8 h with concentrations of 20.5 ppm, 19.45 ppm, and 17.85 ppm for St-LH4, St-LH8, and St-LH12. These lignin-based hydrogels offer a promising, cost-effective solution for slow-release fertilizers with high efficiency.
AB - Conventional fertilizers face environmental and economic challenges due to their high solubility, leading to significant losses via runoff and leachate. This study presents a biodegradable hydrogel, synthesized from lignin and polyvinyl alcohol (PVA), designed as an eco-friendly carrier for struvite (fertilizer) with controlled phosphate release. The hydrogel was analysed through scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Thermogravimetric analysis (TGA) and Differential scanning calorimetry (DSC). Furthermore, the prepared hydrogels demonstrated high water absorption capacities (963.4 %, 706.4 %, and 410 % for LH4, LH8, and LH12, respectively) and exhibited Fickian diffusion behaviour. Phosphate release studies showed a gradual release over 6–8 h with concentrations of 20.5 ppm, 19.45 ppm, and 17.85 ppm for St-LH4, St-LH8, and St-LH12. These lignin-based hydrogels offer a promising, cost-effective solution for slow-release fertilizers with high efficiency.
KW - Hydrogels
KW - Lignin
KW - Phosphate
UR - http://www.scopus.com/inward/record.url?scp=85205579247&partnerID=8YFLogxK
U2 - 10.1016/j.ijbiomac.2024.136292
DO - 10.1016/j.ijbiomac.2024.136292
M3 - Article
AN - SCOPUS:85205579247
SN - 0141-8130
VL - 281
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
M1 - 136292
ER -