| Autor: |
de Moura, Alexandre Amado, Straioto, Henrique, Moreira Martins, Wardleison, de Araújo, Thiago Peixoto, Diório, Alexandre, Bergamasco, Rosângela, Pereira Moisés, Murilo, Dornellas Barros, Maria Angélica Simões |
| Předmět: |
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| Zdroj: |
Desalination & Water Treatment; Sep2023, Vol. 306, p178-188, 11p |
| Abstrakt: |
The aim of this work was to synthesize a low-cost hydrochar via hydrothermal route using two residues from the sugar-energy industries: sugarcane bagasse and the high-pressure boiler water discharge. The applicability of the hydrochar in water treatment process was tested in the biosorption of chloroquine from water in a discontinuous process. The synthesized hydrochar exhibited a high specific surface area (~188 mg·g-1) with average pore diameter <2.0 nm. The biosorption results showed a fast biosorption kinetic in the initial 10 min and an equilibrium time of ~60 min. Acidic properties of both contaminant and HC-T resulted in repulsive forces, therefore, basic conditions would represent the optimum condition for the highest chloroquine biosorption, but that is not interesting for a water treatment plant due to chemicals consumption for pH correction, costs and salinity problems. The pseudo-second-order kinetic and Sips isotherm models were the best models fitted to experimental data. The thermodynamic parameters indicated an endothermic and spontaneous biosorption. The maximum experimental biosorption capacity was 73.34 mg·g-1 at 45°C. In conclusion, hydrothermal-activated carbon (HC-T) is a promising biosorbent, synthesized with an ecofriendly process, for the removal of chloroquine from contaminated waters due to the great availability, quantity and low-cost of sugarcane bagasse in the Brazilian territory, allied with the reusability of high-pressure boiler water. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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