TY - JOUR
T1 - Thermochemical processing of boron-impregnated cellulose insulation waste for upcycling to slow-release boron fertilizers
AU - Everaert, Maarten
AU - Duboc, Olivier
AU - Willems, Elden
AU - Soja, Gerhard
AU - Pfeifer, Christoph
AU - Velthoven, Niels Van
AU - Oliveira-Silva, Rodrigo de
AU - Sakellariou, Dimitrios
AU - Santner, Jakob
PY - 2023/5/1
Y1 - 2023/5/1
N2 - Boron (B) fertilizers are essential for global crop production. Sustainable B use demands a higher efficiency of B fertilizers through controlled B release and an enhanced B recycling from secondary sources, e.g. B-impregnated cellulose fiber insulation (CFI) waste. In this study, thermochemical treatments based on combustion and py-rolysis were investigated for processing CFI waste into a slow-release B fertilizer. Hot-water extractions of ob-tained materials confirmed that slow-release properties were achieved, and material characterization with XRD, FTIR and 11B-NMR showed that these were largely the result of formation of sparingly soluble Ca-B phases. A seedling toxicity test with fodder rape demonstrated the benefit of this slow-release B in comparison with conventional soluble B to circumvent toxicity, suggesting potential for B application via seed coatings. Finally, a fertilization trial with fodder rape and poppy seed showed that most slow-release B compounds were equally effective as soluble B at recommended B doses, while slow-release B can still benefit from reduced B leaching losses.
AB - Boron (B) fertilizers are essential for global crop production. Sustainable B use demands a higher efficiency of B fertilizers through controlled B release and an enhanced B recycling from secondary sources, e.g. B-impregnated cellulose fiber insulation (CFI) waste. In this study, thermochemical treatments based on combustion and py-rolysis were investigated for processing CFI waste into a slow-release B fertilizer. Hot-water extractions of ob-tained materials confirmed that slow-release properties were achieved, and material characterization with XRD, FTIR and 11B-NMR showed that these were largely the result of formation of sparingly soluble Ca-B phases. A seedling toxicity test with fodder rape demonstrated the benefit of this slow-release B in comparison with conventional soluble B to circumvent toxicity, suggesting potential for B application via seed coatings. Finally, a fertilization trial with fodder rape and poppy seed showed that most slow-release B compounds were equally effective as soluble B at recommended B doses, while slow-release B can still benefit from reduced B leaching losses.
UR - https://doi.org/10.1016/j.jclepro.2023.136684
U2 - 10.1016/j.jclepro.2023.136684
DO - 10.1016/j.jclepro.2023.136684
M3 - Article
SN - 0959-6526
VL - 399
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
M1 - 136684
ER -