University of Science and Technology, Center for Carbon Mineralization, Korea Institute of Geoscience and Mineral Resources, Daejeon, 34132, Republic of Korea.
Center for Carbon Mineralization, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Republic of Korea.
J Environ Manage. 2018 Oct 1;223:947-951. doi: 10.1016/j.jenvman.2018.07.011. Epub 2018 Jul 12.
Continuous dumping of oyster shells in open fields has been a global issue, causing serious problems in the water and human health. The conversion of those wastes into value-added products is highly desirable. Here, Green Calcium Hydroxide Nano-plates (GCHNPs) were first synthesized from waste oyster shells by a chemical precipitation method in an aqueous medium at 90 °C without using any additives. The crystal structure with a hexagonal portlandite (Ca(OH)) was observed by both X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The crystal size of around 350-450 nm and specific surface area with 4.96 mg were confirmed by field emission scanning electron microscopy (FE-SEM) and Brunauer-Emmett-Teller (BET), respectively. In addition, a schematically organized new qualitative model for a mechanism was proposed to explain the genesis and evolution of GCHNPs from raw oyster shells.
将牡蛎壳连续倾倒在开阔地是一个全球性问题，这对水和人类健康造成了严重的问题。将这些废物转化为高附加值产品是非常可取的。在这里，通过在 90°C 的水介质中使用化学沉淀法，无需添加任何添加剂，首次从废牡蛎壳中合成了绿色氢氧化钙纳米板 (GCHNPs)。X 射线衍射 (XRD) 和傅里叶变换红外光谱 (FT-IR) 都观察到了具有六方水钙石 (Ca(OH)) 的晶体结构。场发射扫描电子显微镜 (FE-SEM) 和 Brunauer-Emmett-Teller (BET) 分别证实了约 350-450nm 的晶体尺寸和 4.96mg 的比表面积。此外，还提出了一个示意性组织的新定性机制模型，以解释从原始牡蛎壳中产生和演化 GCHNPs 的过程。
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