나노 크기 적철석 입자 피복 모래를 이용한 비소 3가와 비소 5가의 제거 = Removal of Arsenite and Arsenate by a Sand Coated with Colloidal Hematite Particl

국문 초록 (Abstract)

금속광산 일대의 비소오염 지중 복원기술로써 투수성 반응벽체의 흡착제로 철산화물인 적철석 피복 모래의 적용가능성을 평가했다. 이를 위해서 흡착곡선실험, 비소제거속도실험 및 컬럼내 비소 제거 실험을 통해서 철산화물 피복 모래에 의한 비소 3가와 비소 5가의 제거 효율 및 유동환경에서의 비소 제거능력에 대해 고찰하였다. 적철석 피복 모래는 1.0 mg/L 수준의 낮은 비소 농도에서 높은 흡착력을 보이는 선형 등온 흡착곡선을 보였다. 컬럼실험에서 높은 피복모래의 안은 비소제거효율을 높였으나, 비소 3가가 비소 5가보다 흡착력이 떨어지고 지하수의 유동적인 환경에서 비소의 물리적 확산 현상으로 흡착반응속도의 저하 때문에 제거양이 감소했다. 따라서, 유동적인 환경에서 피복모래의 상대적인 양, 비소화학종의 흡착력, 흡착반응속도가 제거 효율을 좌우했다.

다국어 초록 (Multilingual Abstract)

Hematite-coated sand was examined for the application of the PRB (permeable reactive barrier) to the arsenic-contaminated subsurface in the metal mining areas. The removal efficiency of As in a batch and a flow system was investigated through the adsorption isotherm, removal kinetics and column experiments. Hematite-coated sand followed a linear adsorption isotherm with high adsorption capacity at low level concentrations of As (＜1.0 mg/L). In the column experiments, high content of hematite-coated sand enhanced the removal efficiency, but the amount of the As removal decreased due to the higher affinity of As (V) than As (III) and reduced adsorption kinetics in the flow system. Therefore. the amount of hematite-coated sand, the adsorption affinity of As species and removal kinetics determined the removal efficiency of As in a flow system.

참고문헌 (Reference)

• 1 "휴/폐광 금은광산 주변의 토양오염조사와 복구시스템 연구" 32 : 385-398, 1999
• 2 "풍화광미내 고상 비소의 광물학적 화학적 특성 및 출 가능성 평가" 36 : 27-38, 2003
• 3 "다덕광산 주변지역에서의 독성원소들의 환경오염 및 인체흡수도" 33 : 273-282, 2000
• 4 "국내 폐금은 광산주변의 비소 및 중금속의 오염 가능성과 복원 순위" 40 (40): 367-378, 2003
• 5 "고로폐광산 주변 농경지 토양 및 하천 퇴적토의 중금속 오염 분포 및 복원 대책 설계" 36 : 89-101, 2003
• 6 "Zero-valent iron for the in-situ remediation of selected metals in groundwater" 123 : 499-505, 1997
• 7 "Study of the remediation of a site contaminated with arsenic" 220 : 185-, 1998
• 8 "Standard methods for examination of water and wastewater" 2001
• 9 "Removal of arsenic from groundwater by iron-oxide-coated sand" 122 : 769-771, 1996
• 10 "Recommendations" who : 1993
• 11 "Permeable Reactive Treatment" 2000
• 12 "Nanoscale iron particles for complete reduction of chlorinated ethane" 191 : 97-105, 2001
• 13 "Formation mechanism of monodisperse pseudocubic-hematite particles from condensed ferric hydroxide Gel" 159 : 372-382, 1992
• 14 "Effects of pore water velocity on the transport of arsenate" 31 : 704-709, 1997
• 15 "Directive related with drinking water quality intended for human consumption" 1998
• 16 "Colloid barrier formation by nanoscale hematite particles"" 2002
• 17 "Chromate and oxalate adsorption on goethite. 2. Surface complexation modeling of competitive adsorption" 2365-2370, 1992
• 18 "Arsenite and arsenate adsorption on ferryhydrite: surface charge reduction and net OH-release stoichiometry" 1179-1184, 1999
• 19 "Arsenic removal using a polymeric/inorganic hybrid sorbent" 164-176, 2003
• 20 "Arsenic in drinking water" 1999
• 21 "Arsenic contamination of soils and stream sediments from the tailings in the vincinity of Myungbong Au mine in Korea" 2 : 1241-1244, 2001
• 22 "Arsenic contamination of soils and sediments from tailings in the vicinity of Myungbong Au mine, Korea" 15 (15): 67-74, 2003
• 23 "Arsenic Treatment Technologies for Soil" 2002
• 24 "Arsenic Removal by Ferric Chloride" 155-167, 1996
• 25 "Arsenate sorption by Fe(III)-doped alginate gels" 32 : 1544-1552, 1998
• 26 "A review of the source, behaviour and distribution of arsenic in natural waters"" . 17 : 517-568, 2002
• 27 "-Enhanced Dechlorination of Volatile Organic Compounds Using an In-Situ Reactive Iron Wall" EnviroMetal Technologies, Inc 105-, 1998