Removal of Cr by Modified Biochar Derived from Corn Husk.
Journal of nanoscience and nanotechnology(2021)
摘要
In this study, the physicochemical properties of modified biochar using different methods, such as physical (CO₂, steam) and chemical (KOH and H₃PO₄) methods, were estimated by X-ray diffraction, N₂ adsorption-desorption, field-emission scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. The performance of chars was evaluated using a Cr adsorption performance test. Among various chars modified in this study, CHC-P modified by H₃PO₄ showed the highest chromium adsorption efficiency. The adsorption efficiency was affected by the high nano-porosity, large surface area, and surface oxygen-containing functional groups.
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