| Popis: |
Corncob (CC) is one of the high-yield agricultural by-products used for recycling in many fields. Corncob-based biochar (CCB) is considered a potentially low-cost adsorbent. The article aims to describe the structural and morphological changes of CCB under different pyrolysis temperatures (350oC, 450oC, and 550 oC) and duration (30, 60, and 90 minutes). Using the FTIR, SEM, BET, and BJH analysis, the evolution of the changes in the properties of CCBs was evaluated. FTIR spectra showed that the surface of CCBs contained abundant carbon-containing in functional groups such as an alkane, aromatic ring, are suitable for binding pollutants in solution. It might be concluded that the CCB550/90 can be a potential adsorbent due to possessing the highest surface area (127.295 m2.g-1), total pore volume (0.080 cm3.g-1) and the heterogeneous structure. The preliminary experiment result also showed that CCB550/90 had the highest phosphate adsorption capacity with 9.799 mg.g-1 in the stock solution, and removed up to 98% of phosphate. The new research results could be used to further biochar studies or even apply to the large-scale production of adsorbents. |
