Adsorption of methylene blue dye from the aqueous solution via bio-adsorption in the inverse fluidized-bed adsorption column using the torrefied rice husk
| Autor: | Sha Luo, Songbo He, Khalid Khazzal Hummadi |
|---|---|
| Přispěvatelé: | Chemical Technology |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Adsorption capacity
Environmental Engineering Health Toxicology and Mutagenesis Husk Torrefaction Water Purification chemistry.chemical_compound symbols.namesake Adsorption Environmental Chemistry Aqueous solution Inverse fluidized bed Textile wastewater Public Health Environmental and Occupational Health Langmuir adsorption model Water Oryza General Medicine General Chemistry Pollution Volumetric flow rate Methylene Blue Kinetics chemistry Fluidized bed Bio-adsorption symbols Methylene blue Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | Chemosphere, 287:131907. PERGAMON-ELSEVIER SCIENCE LTD |
| ISSN: | 0045-6535 |
| Popis: | In this work, the inverse fluidized-bed bio-adsorption column is applied for the first time and is demonstrated using the torrefied rice husk (TRH) for the removal of methylene blue from the solution. The bio-adsorbents were characterized by BET, FI-IR, and SEM. The inverse fluidized-bed adsorption column using TRH becomes saturated in the 95-min continuous adsorption, during which the breakthrough time is 22 min, the overall MB removal (R) is 84%, and the adsorption capacity (Qexp) on the TRH is 6.82 mg g−1. These adsorption characteristics are superior to those in the fixed-bed adsorption column (R of 52% and Qexp of 2.76 mg g−1) at a lower flow rate (100 vs. 283 cm3 min−1). Torrefaction of RH significantly increases the surface area (28 vs. 9 m2 g−1) and enhances the surface functional groups, leading to an improved maximum equilibrium adsorption amount from 21.5 to 38.0 mg g−1 according to Langmuir model in the batch adsorption system. Besides, the increased Qexp on the TRH is also obtained in the inverse fluidized-bed (5.25 vs. 2.77 mg g−1, 89% higher) and the fixed-bed (2.76 vs. 1.53 mg g−1, 80% higher) adsorption columns compared to that on the RH. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect