Dumitru Danut-Alexandru, Poplacean Iuliana-Cornelia, Maskaric Karlo, Tămaş Tudor, Barbu-Tudoran Lucian, Cinta Pinzaru Simona
Ioan Ursu Institute of the Faculty of Physics, Babeş-Bolyai University, 1 Kogălniceanu, 400084 Cluj-Napoca, Romania.
RDI Institute in Applied Natural Sciences, 30 Fântânele, 400327 Cluj-Napoca, Romania.
ACS Omega. 2024 Aug 21;9(35):37086-37093. doi: 10.1021/acsomega.4c04138. eCollection 2024 Sep 3.
The highly demanded calcium acetate (Ca(CHCOO)) for biomedicine and various industries constantly requires green and low-cost methods of synthesis. In the present work, a sustainable approach to produce Ca(CHCOO) is reported as a proof of concept, processing for the first time as a starting material the worldwide highly abundant shells, which is a neglected biogenic waste with high economical potential due to the rich mineral and organic pigmentary content. A green synthesis involving an eco-friendly acetic acid has been optimized at room temperature, without any additional energy consumption, and the resulting saturated Ca(CHCOO) solution was further slowly evaporated in three stages to obtain white Ca(CHCOO) crystalline powder, without impurity traces. Raman spectroscopy provided efficient structural information for every step of the process control, during demineralization as well as end product validation. Yields as high as 87.5% of highly pure Ca(CHCOO) mass have been achieved from raw shells, proving the uniqueness and economic viability of the method. X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDX), and Fourier-Transform IR spectroscopy (FTIR) analyses validated the final product identity, hydration status, crystalline morphology, and composition. The purity of the resulting product suggests a high valorization potential of the abundant shell in the context of the blue bioeconomy and offers a cleaner and efficient method of Ca(CHCOO) production with important applications in relevant industries.
生物医学和各种工业对醋酸钙（Ca(CH₃COO)₂）的需求量很大，因此一直需要绿色且低成本的合成方法。在本研究中，报告了一种可持续生产醋酸钙的方法作为概念验证，首次将全球储量丰富的贝壳作为起始原料进行加工，贝壳是一种被忽视的生物源废物，因其富含矿物质和有机色素成分而具有很高的经济潜力。在室温下优化了一种使用环保型乙酸的绿色合成方法，无需任何额外能耗，然后将所得的饱和醋酸钙溶液分三个阶段缓慢蒸发，以获得无杂质痕迹的白色醋酸钙结晶粉末。拉曼光谱为脱矿过程以及最终产品验证中的过程控制的每个步骤提供了有效的结构信息。从生贝壳中获得了高达87.5%的高纯度醋酸钙质量产率，证明了该方法的独特性和经济可行性。X射线衍射（XRD）、带能谱的扫描电子显微镜（SEM-EDX）和傅里叶变换红外光谱（FTIR）分析验证了最终产品的特性、水合状态、晶体形态和组成。所得产品的纯度表明，在蓝色生物经济背景下，储量丰富的贝壳具有很高的增值潜力，并提供了一种更清洁、高效的醋酸钙生产方法，在相关行业具有重要应用。
