Excess phosphorus in water has become a crucial aspect concerning the eutrophication. Experiments were carried out to fabricate particles of iron oxide to polymer and the beads were then calcinated. It was found that adsorption process most satisfactory fitted to Langmuir equation (R2>0.92) with maximum adsorption capacity 2.663 mg P/g adsorbent. Equilibrium of adsorption was reached after 3 h, while the initial adsorption rate increased from 0.46 mg/g-h to 3.83 mg/g-h when the bead iron content increased from 40.4 mg Fe/g to 160 mg Fe/g. This research was supported by a project (No. 2013001390002) from the Korea Environmental Industry & Technology Institute funded by the Ministry of Environment and the Brain Korea 21 Plus program of the Korean government.

Synthesis of iron nanopowder by room-temperature electrochemical reduction process of nanopowder was investigated in terms of phase evolution and microstructure. As process variables, reduction time and applied voltage were changed in the range of h and V, respectively. From XRD analyses, it was found that volume of Fe phase increased with increasing reduction time and applied voltage, respectively. The crystallite size of Fe phase in all powder samples was less than 30 nm, implying that particle growth was inhibited by the reaction at room temperature. Based on the distinct equilibrium shape of crystalline particle, phase composition of nanoparticles was identified by TEM observation.