In order to establish the design parameters of adsorption for arsenic compounds with hydrotalcite including chlorine ion, the basic properties of adsorption and desorption as well as the oxidation of As (Ⅲ) were examined in batch tests. The maximum adsorption capacities of arsenite and arsenate were 6.2 ㎎-As(Ⅲ)/g and 103 ㎎-As (Ⅴ)/g, respectively. Although 80.4% of maximum desorption was shown in 20% NaOH solution, 5∼10% of NaOH was recommended considering operating benefits, where the proper condition of the desorption was in the range of 73% to 80%. The most suitable desorption condition was in the combination of NaCl (10∼20%) and NaOH (5∼10%). Within 2 minutes, As (Ⅲ) was easily oxidized to As (Ⅴ) with 0.0001 N KMnO4, where the maximum oxidization ratio was shown to 98.9%.

Abstract
 1. 서 론
 2. 실험 및 방법
  2.1. 재료 및 As (Ⅲ)/As (Ⅴ) 흡착
  2.2. As (Ⅴ) 탈착
  2.3. As (Ⅲ) 산화
 3. 결과 및 고찰
  3.1. As (Ⅲ)/As (Ⅴ) 흡착
  3.2. 탈착 특성
  3.3. 산화 특성
 4. 결론
 REFERENCE

• 박순길(경상북도 보건환경연구원) | Soon-Geel Park (Institute of Health & Environment)
• 정용준(부산가톨릭대학교 환경공학과) | Yong-Jun Jung (Department of Environmental Engineering, Catholic University of Pusan) Corresponding author