Carbon dioxide is contained in the flue gas of many industrial plants, including those producing cement and power, and makes a significant contribution to climate change. Thus, methods to reduce carbon dioxide emissions are under intensive investigation. Carbon capture, utilization, and storage (CCUS) is a technology for converting captured carbon into useful chemical compounds while reducing CO₂ emissions. Thus, CCUS technology is a promising method for combating global warming. In this study, we focused on a mineral carbonation CCUS process using seawater-based industrial wastewater (SBIW). A two-step CCUS process using NaOH as an absorbent for CO₂ capture was used to produce two types of metal carbonate. Inductively coupled plasma optical emission spectroscopy, X-ray diffractometry, thermogravimetric analysis, and field-emission scanning electron microscopy techniques were used for analysis. Using our new technique, we obtained high-purity NaHCO₃ (92.2%) and MgCO₃ ·3H₂O (93%). We also found that it is possible to improve the utilization of the cations present in seawater.

许多工厂（包括生产水泥和电力的工厂）的烟道气中都含有二氧化碳，对二氧化碳的排放做出了重大贡献。因此，减少二氧化碳排放的方法正在深入研究中。碳捕获，利用和存储（CCUS）是一项用于在减少CO ₂排放的同时将捕获的碳转化为有用的化合物的技术。因此，CCUS技术是应对全球变暖的一种有前途的方法。在这项研究中，我们集中于使用基于海水的工业废水（SBIW）进行矿物碳化CCUS工艺。使用NaOH作为CO ₂吸收剂的两步CCUS工艺捕集用于生产两种类型的金属碳酸盐。电感耦合等离子体发射光谱，X射线衍射，热重分析和场发射扫描电子显微镜技术被用于分析。使用我们的新技术，我们获得了高纯度NaHCO ₃（92.2％）和MgCO ₃ ·3H ₂ O（93％）。我们还发现可以提高海水中存在的阳离子的利用率。