| Autor: |
Priyanka Doondani, Vaishnavi Gomase, D. Saravanan, R.M. Jugade |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Results in Engineering, Vol 15, Iss , Pp 100515- (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2590-1230 |
| DOI: |
10.1016/j.rineng.2022.100515 |
| Popis: |
Cotton straw generated biochar was coated with chitosan using oxalic acid as a crosslinking agent. This chitosan-oxalic acid-biochar composite was characterized and analyzed for adsorption of synthetic azo-dye Reactive Red 21. Batch as well as column studies in fixed bed mode were carried out. The monolayer adsorption capacity was found to be 125.1 mg g−1 at pH 5.0, with just 90 min of adsorption highlighting this as super-sorbent material. Langmuir as well as Redlich-Peterson isotherms exhibited best fit models with the experimental data. Kinetics studies suggested a pseudo second order adsorption process in agreement with Langmuir isotherm. The thermodynamics of adsorption disclosed the fact that process is purely enthalpy-driven, spontaneous, and exothermic in nature. The presence of biopolymer, organic cross-linker, and biowaste altogether in a single adsorbent material led to an excellent super-sorbent for the dye. The effect of cationic, anionic, and non-ionic surfactants on the adsorption efficiency has also been studied. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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