| 초록 |
Arsenic, the chronic health effect agent, widely distributed at high level in surface water and ground water that causes serious health problems relating to skin and internal cancers. Recently, technologies based on nano-particles iron and iron (hydr)oxide have found as effective adsorbents for arsenic removal from water sources over wide range of pH. In this study, arsenic removal was evaluated under various physical and chemical conditions using three commercial nanoscale adsorbents: zero-valent iron, iron(III) oxide and magnetite. The time of adsorption is achieved in hour with these nanoscale adsorbents and the equilibrium concentration of arsenic meets to the WHO standard (＜ 10 µg/L) which accounts more than 99% of the initial concentration. The arsenic adsorption capacity decreases in the following order: zero-valent iron ＞ iron(III) oxide ＞ magnetite. Among of these adsorbents, iron(III) oxide nanoparticles is less aggregated than the others in various pH values. |
