The characteristics of precipitation separation and solvent extraction separation of magnesium from the waste bittern were studied experimentally. In the result of precipitation separation, the size of magnesium hydroxide precipitated was not affected on pH, but decreased with increasing the precipitation temperature. The purity of magnesium oxide precipitated was increased with pH beyond pH 11. From the solvent extraction separation, the equilibrium extraction ratio of magnesium was increased with pH and temperature of extraction phase, the concentration of stripping phase, and with decreasing pH of stripping phase. The extractant of Aliquat 336 and Acid 810 mixture was more effective than that of DCH18C6 and D2EHPA mixture in the extraction separation of magnesium.

• 주창식(부경대학교 화학공학부) | Chang Sik Ju
• 이경옥(경기공업대학 청정생산기술과) | Kyung Ok Lee
• 정성옥(인제대학교 환경시스템학부) | Sung Wook Jeong
• 박흥재(인제대학교 환경시스템학부) | Heung Jai Park
• 나석은(동명대학교 공업화학과) | Seok Eun Na
• 정갑섭(동명대학교 공업화학과) | Kap Seop Jeong Corresponding Author