Đặc trưng và khả năng hấp phụ metyl da cam của tro trấu hoạt hóa
Abstract
The adsorption capacity of rice husk ash could be improved by activation steps. In this study, rice husk ash from the combustion furnace of brick manufacture was activated by a chemical corrosion with hydrofluoric acid (HF). The objectives of this study were to: (1) determine the characterization of activated rice husk ash (A-RHA) and (2) compare the methyl orange (MO) adsorption capacity of A-RHA and activated carbon (AC) adsorbents. Characterizations of A-RHA (including, Fourier Transformation Infrared (FTIR), X-Ray Diffraction, and specific surface area (Brunauer Emmett Teller method - BET)) were analysed. Our results show that the specific surface area of A-RHA is ~ 410 m2/g greater than that of fresh rice husk ash (i.e. ~ 16 m2/g). The equilibrium time for MO absorption is short recorded for the A-RHA material (~ 15 min.). Besides, the MO adsorbent capacity of A-RHA is ~ 1.7-fold greater than that of the AC. It suggests that the A-RHA material is a potential adsorbent for removing organic compounds from wastewater.
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