부분 탄화된 모발 입자의 수용액에서의 금속이온 흡착

Abstract

This study reports that the selective adsorption of metal ion from an aqueous solution is possible using partially burnt hair (PBH) particles. PBH was a brittle stable solid under normal air and moisture conditions. Scanning electron microscope images show that PBH has many small pores (diameters 1~2μm). The pore formation indicates that the surface of PBH has different physicochemical properties than the bulk of hairs. Weight loss of the human hair tested was 30% at 300℃ and 70% at 500℃. Several common metal ions (ie, Ag+, Pb2+, Cu2+, and Fe2+) were included in our adsorption test. Among them, PBH particles exhibited the greatest adsorption capacity for silver ion, with a selectivity order of Ag+>Pb2+>Cu2+> Fe2+. The maximum adsorption rate was 98.5% (Ag+ solution), 45% (Pb2+ solution), 18.5% (Cu2+ solution), and 4.3% (Fe2+ solution). These results show that human hair has great potential to resolve heavy metal pollution from environment. It has been suggested that PBH particles could be a suitable candidate for the development of anti-pollution cosmetic products.