Abstract:
The magnetic nanoparticles were prepared from River Suci Bengkulu beach sand using two-stage ball
milling for 120 hours. The product of the ball milling was divided into 3 parts and then doped using
manganese (Mn) with a concentration of (0; 5; and 15)% of the total mass magnetic nanoparticles using
ball milling for 20 hours. These nanocomposite (α-Fe2O3/Fe3O4+Mn) were used to adsorb some heavy
metals such a lead Pb and Cu in Sungai Siak’s water at Duku Harbor Pekanbaru. The magnetic
susceptibility of the samples was measured using Pasco Magnetic Probe PS-2162. The crystallite size
and magnetic phase of the product were determined using X-Ray Diffraction (XRD) method. The
amount of heavy metal adsorption was determined using Atomic Absorption Spectroscopy (AAS). The
XRD characterization results showed that the crystalline size increases with increasing manganese (Mn)
concentration. Moreover, the sample consisted two magnetic phase that is Fe3O4 (Magnetite) and α-
Fe2O3 (Hematite). The AAS characterization results showed that the amount of heavy metals decreases
with the increase in the concentration of manganese (Mn).
