Green synthesis of Fe-Ni bimetallic material from guava leaf extract for Cu removal from wastewater

Abstract

This study synthesized Fe-Ni bimetallic material from the guava leaf extract for the removal of copper (Cu) from wastewater. The material composition was characterized using EDS and FT-IR spectra. SEM images indicated that particle sizes ranging from 60 to 90 nm, confirming the nanoscale nature of the material. Batch adsorption experiments were conducted with an initial Cu concentration in solution of 5 mg/L. The results showed that Fe-Ni exhibited Cu removal capability, as evidenced by EDS and FT-IR analyses after the adsorption process. The removal mechanism was proposed to involve adsorption and reduction processes on the material surface. Optimal conditions were found to be pH 6, Fe-Ni dosage of 0.8 g/L, temperature of 25°C, contact time of 150 minutes, achieving a maximum removal efficiency of 79%. These results suggest that Fe-Ni synthesized from guava leaves is a friendly and low-cost adsorbent with strong potential for Cu removal in water treatment applications.