This study deals with inorganic Carbon dioxide Capture Utilization (CCU) by using seawater-based industrial wastewater. Industrial wastewater, which contains plenty of cations such as Ca²⁺ and Mg²⁺, is considered as a cation source for mineral carbonation. Modeled industrial wastewater was used to study the tendency of mineral carbonation on various condition. Cation concentration of industrial wastewater was modified at various levels and then reacted with fully CO_2- absorbed 30wt.% monoethanolamine (MEA) solution. A metal carbonate precipitated as a result of the reaction, and the same experiment was performed with 1/3, 2/3 CO_2-absorbed MEA solution to study the tendency of carbonation under different CO₃ ^2- conditions. The amount of precipitate was increased proportionally to the cation concentration and the amount of absorbed CO₂. Most of the precipitate was calcium carbonate (CaCO₃), although other metal carbonates were also formed. Most of the CaCO₃ was found in calcite form, but vaterite and aragonite were also formed under specific conditions. Based on the experimental results, we conclude that by controlling the concentration of cations and CO₃ ^2-, we were able to optimize mineral carbonation conditions. We also noticed that low CO₃ ^2- concentration in MEA solutions is advantageous for producing high quality calcium carbonate crystals. Inductively Coupled Plasma (ICP), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM) analyses were performed to analyze the precipitate.