Waste crab shells (CS) have the potential to mineralize CO₂, yielding precipitated calcium carbonate (PCC) powder feedstock for use in the synthesis of monocalcium phosphate monohydrate (MCPM) in an acidic condition by partial neutralization of phosphoric acid at 90 °C and varying times (30–120 min), followed by evaporation of the water at 100 °C. The PCC and MCPM products were analyzed using X-ray powder diffraction, Fourier transform infrared spectroscopy, and the scanning electron microscopy/energy dispersive X-ray method. After 120 min of stirring, the pure MCPM revealed uniform particle sizes from 1 to 3 μm. The presented MCPM synthesis using the PCC powder precursor may assist in developing a large-scale MCPM industry while recycling a considerable quantity of CS waste.

中文翻译：

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利用蟹壳废料合成高纯度一水磷酸二氢钙

废蟹壳 (CS) 具有矿化 CO _{2 的}潜力，产生沉淀碳酸钙 (PCC) 粉末原料，用于在酸性条件下通过在 90 °C 下部分中和磷酸来合成一水合磷酸一钙 (MCPM)不同的时间（30-120 分钟），然后在 100 °C 下蒸发水。使用X射线粉末衍射、傅里叶变换红外光谱和扫描电子显微镜/能量色散X射线方法对PCC和MCPM产物进行分析。搅拌 120 分钟后，纯 MCPM 显示出 1 至 3 μm 的均匀粒径。所提出的使用 PCC 粉末前体合成 MCPM 可能有助于发展大规模的 MCPM 产业，同时回收大量的 CS 废物。