이성오 김완태 오종기 신방섭 2024-01-21T18:46:49Z 2024-01-21T18:46:49Z 2022-01-10 1997-01 https://pubs.kist.re.kr/handle/201004/144080 Iron-removal of clay mineral with oxalic acid 옥살산에 의한 점토광물의 탈철 Article 3 자원と소재 (Shigen-to-sozai), v.113, no.11, pp.847 - 851 자원と소재 (Shigen-to-sozai) 113 11 847 851 iron-removal clay mineral oxalic acid leaching of iron oxide chemical treatment organic acid iron oxalate hydrate