| 1992-12 | Recovery of acids and valuable metals from stainless-steel pickling acids. | 오종기; 김성규; 이화영; 이동휘 |
| 1993-06 | Recovery of gallium and indium from zinc residues by acid leaching. | 오종기; 김성규; 이화영 |
| 2000-06 | Recovery of gallium from zinc residues by solvent extraction | 김성규; 이화영; 오종기 |
| 2000-06 | Recovery of gallium from zinc smelting residues by alkali leaching | 김성규; 이화영; 오종기 |
| 1999-06 | Recovery of nickel from low-grade laterite by electrochemical leaching. | 김성규; 이화영; 오종기 |
| 1998-03 | Recovery of nickel from waste pickling solution with column extractor | 김성규; 이화영; 오종기 |
| 1993-12 | Recovery of nitric and hydrofluoric acids from waste pickling solutions with column extractor. | 오종기; 김성규; 이화영 |
| 1994-08 | Recovery of zirconium by column extractor. | 오종기; 김성규; 이화영 |
| 1995-12 | Recycling technology for waste tires. | 오종기; 이동휘 |
| 1998-06 | Recycling technology of non-ferrous metals in Korea | 오종기 |
| 2002-06 | Removal of ammonia from aqueous solutions with zeolite and bentonite | 이화영; 오종기; 김성규; 고현백 |
| 1997-12 | Removal of arsenic from closed mine tailings by alkali-leaching method | 오종기; 이재령; 김성규; 이화영; 박재구 |
| 1998-10 | Removal of ferric ion from oxalic acid solution by solvent extraction | 김성규; 이화영; 오종기 |
| 1999-11 | Removal of ferric ions from iron (III) oxalato complexes reacted with calcium hydroxide in solution | 이성오; 김명준; 오종기; 신방섭 |
| 1998-08 | Removal of iron from domestic low-grade halloysite by bacterial leaching | 김성규; 박두현; 이화영; 오종기 |
| 1999-01 | Removal of iron from domestic low-grade halloysite with dithionite | 김성규; 이화영; 오종기 |
| 1992-06 | S study on the preparation of Cu-graphite composite powders. | 오종기; 김택훈; 이화영 |
| 1993-10 | Separation of hafnium from zirconium by solvent extraction. | 오종기; 김성규; 이화영; 이혜리 |
| 1998-04 | Separation of nickel and copper from ammoniacal ammonium solution by solvent extraction | 김성규; 이화영; 오종기 |
| 1999-04 | Separation of yttrium element with aliquat 336 and simulation | 김성규; 이화영; 오종기 |
| 1986-06 | Solvent extraction of nickel from ammoniacal ammonium or weak acidic solutions by LIX64N, LIX65N, D2EHPA and versatic acid-10. | 오종기; 이화영; 이동휘 |
| 1995-06 | Solvent extraction of yttrium and rare earths with versatic acid-10. | 오종기; 김성규; 이화영; 이동휘 |
| 1997-10 | Stoichiometric relation for the extraction of ferrous ion with D2EHPA | 오종기; 김성규; 이화영 |
| 2001-04 | Stoichiometric relation for the extraction of zirconium and hafnium with versatic acid-10 | 김성규; 이화영; 오종기 |
| 1996-01 | Stoichiometry of solvent extraction of gallium with D2EHPA and versatic acid-10. | 오종기; 이화영; 김성규 |
| 1994-12 | Synthesis of fibrous calcium silicates by hydrothermal reaction. | 오종기; 김성규; 이화영 |
| 1993-01 | Synthesis of kaolinite and transformation of halloysite by hydrothermal reaction. | 오종기; 김성규; 이화영 |
| 1996-03 | Technology for removal of iron impurities from clay resources | 오종기; 김성규; 이화영 |
| 1997-12 | The properties of Fe(III) removal from domestic halloysite by metal-reducing bacterium, Shewanella putrefaciens 1R-1 | 박두현; 김병홍; 김성규; 이화영; 오종기 |
| 2005-04 | Treatment of ASR from End-of-Life vehicles by air and gravimetric separation | 이화영; 오종기 |
