In this study, a liquid carbonation method was applied for producing precipitate calcium carbonate by liquid-liquid reaction. We recycled the recycling water of ready-mixed concrete, one of construction waste for use source of carbonate ion. A supernatant separated from the recycling water of ready-mixed concrete, as a result of ICP analysis of a cation, Ca²+ was contained up to 1100 ppm. We used MEA as a CO₂ absorbent for the liquid carbonation. A precipitate CaCO₃ was produced at more than MEA 20 wt%. The precipitate CaCO₃ as a final product was separated and dried. The result of XRD was confirmed the generation of CaCO₃ to calcite structure.

• 임윤희((주)애니텍 기술연구소, 경희대학교 환경응용과학과) | Yun-Hui Lim
• 이주열((주)애니텍 기술연구소, 경희대학교 환경응용과학과) | Ju-Yeol Lee
• 최창식(고등기술연구원 플랜트엔지니어링센터) | Chang-Sik Choi
• 홍범의(고등기술연구원 플랜트엔지니어링센터) | Bum-Ui Hong
• 박진원(연세대학교) | Jin-Won Parkd
• 이대영(IK) | Dae-Young Lee
• 박병현((주)애니텍 기술연구) | Byung-Hyun Park Corresponding author