SINTESIS NANOMATERIAL MAGNETIT-SITRAT DAN PENGUJIAN APLIKASINYA SEBAGAI ADSORBEN EMAS (III)

Abstract

This study aims to synthesize magnetite nanomaterial that dispersed with trisodium citrate (Fe 3 O 4 @citrate), to conduct the characterization, and to test its application in adsorbing of Au(III). Research condcuts by synthesis of Fe 3 O 4 with stirring using ultrasonic waves to synthesis of magnetite in the system of co-precipitation, to use sodium citrate as dispersing agent of magnetite, and to use acetone-water as solvent at washing of magnetite. Synthesized product is characterized by Fourier Transform Infrared spectrophotometer (FTIR), X-ray diffractometer (XRD), and transmission electron microscope (TEM). The characterized results indicate that Fe 3 O 4 @citrate has successfully synthesized with particle size of 17 nm. Fe 3 O 4 @citrate has smaller particle size, has smaller aggregates and has better particle dispersion than Fe 3 O 4 without citrate. Testing the potential of synthesized Fe 3 O 4 @citrate as adsorbent of Au(III) from HAuCl 4 solution of 200 ppm at pH 3. the Synthesized Fe 3 O 4 @citrate adsorbe the gold(III) of (81.554 ± 1.403) mg/g.