| Autor: |
Echeverría-Pérez, Jaime, Carvajal-Palacio, Wendy, Gómez-Plata, Leandro, Vacca-Jimeno, Víctor, Cubillán, Néstor |
| Zdroj: |
Emergent Materials; August 2023, Vol. 6 Issue: 4 p1217-1229, 13p |
| Abstrakt: |
In this work, indigo carmine (IC) removal with corn cob (NCC) and KOH-treated (MCC) biomasses were studied. The removal efficiency (%R) was maximized by varying adsorbent dosages (D), initial concentrations (C0), and pHs. Therefore, Dof 4 and 5 g L−1at 50 mg L−1of C0and pH 2 maximized %Rfor NCC (70%) and MCC (71%). The KOH-based chemical modification significantly enhanced the pore sizes and the point of zero charge. Moreover, the site’s availability also increased. Chemisorption, including adsorbate-adsorbate interaction, addressed kinetics according to the pseudo-second-order and Elovich models. The Langmuir model fit well with the isotherm data suggesting that the process is thermodynamically favored for NCC. Electrostatic interactions, hydrogen bonds, and π-related interactions mainly conducted the adsorption process. The optimum adsorption capacities showed that NCC (19.87 mg·g−1) was more efficient than MCC (15.59 mg·g−1) and several reported biomass-based adsorbents. These results suggest that corn cob biomass is a promising low-cost adsorbent to bioremediate IC. |
| Databáze: |
Supplemental Index |
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