Universiti Malaysia Sarawak
Purpose Utilization of food waste as composting materials ofers a sustainable solution to manage waste and reduce reliance on fertilizers. Method This study is focused on the efciency of food waste compost and the efect of the addition of magnetite (Fe3O4) nanoparticles on the growth and heavy metals uptake by roselle (Hibiscus sabdarifa) for the cultivation period of 127 days. Five diferent treatments were applied, namely soil (S), food waste compost (F), a mixture of soil and Fe3O4 (SM), a mixture of soil and food waste compost (SF), and a mixture of soil, food waste compost, and Fe3O4 (SFM). Results After 127 days of cultivation, the plant height averaged at 803 mm with 26 leaves produced across all treatments. Total leaf area, fruit production, and biomass yield were diferent (P0.05) from its control (without Fe3O4) in relation to growth performance. Conclusion The fndings of this study showed that food waste can be applied in composting to promote plant growth. Therefore, it can be considered as a substitute for chemical fertilizers. Meanwhile, the application of Fe3O4 appeared to be experimental-condition dependent.