The application of the agricultural waste of cashew nut shells (CNSs) from the Ivory Coast is proposed for the production of activated carbon (AC) used in water treatment by the physical activation. Washed and crushed CNSs are carbonized at 800°C. The crushed CNS carbonizate is activated by the physical method in a temperature range from 400 to 700°C. The specific surface (SBET) and porous structure of the AC samples are investigated by low-temperature nitrogen desorption and X-ray structural (X-ray phase) analysis. The results show that an increase in the activation temperature at a fixed time leads to an increase in the material specific surface, the development of a microporous structure, and an increase in the summary volume of mesopores and micropores of AC. The X-ray phase analysis data shows that the degree of graphitization, interplanar spacing, and crystallite sizes vary insignificantly. The possibility of using CNSs to fabricate AC no worse in sorption properties than its analogs currently in use to purify water is proven.

中文翻译：

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从腰果壳中制备活性炭用于水净化

提议将来自象牙海岸的腰果壳（CNS）的农业废料用于通过物理活化生产用于水处理的活性炭（AC）。洗涤和压碎的CNS在800°C时碳化。粉碎的CNS碳化物通过物理方法在400至700°C的温度范围内活化。通过低温氮解吸和X射线结构（X射线相）分析研究了AC样品的比表面（SBET）和多孔结构。结果表明，固定时间的活化温度的升高导致材料比表面积的增加，微孔结构的发展以及AC的中孔和微孔的总体积的增加。X射线相分析数据显示出石墨化程度，晶面间距和微晶尺寸变化不大。事实证明，使用CNS制备AC的吸附性能不会比目前用于纯化水的类似物差。