Bio-Waste Recovery for the Removal of Cr (VI) in Aqueous Solution: Case of the Green Alga Ulva lactuca
| Autor: | Abdallah Aziz, Belkacem Bouacherine, Andrei Shishkin, Hafida Hentit, Jean Claude Jumas, Abdelkader Iddou |
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| Rok vydání: | 2017 |
| Předmět: |
Aqueous solution
Materials science biology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics biology.organism_classification 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Chromium Algae chemistry Wastewater Environmental chemistry General Materials Science Ulva lactuca Waste recovery 0210 nano-technology |
| Zdroj: | Solid State Phenomena. 267:139-144 |
| ISSN: | 1662-9779 |
| DOI: | 10.4028/www.scientific.net/ssp.267.139 |
| Popis: | This work is in addition to the various works undertaken by the researchers, using biomass as adsorbent. However, the aim of this study is the recovery of a marine material alga: Ulva lactuca) that we were able to transform into adsorbent with treatment under physical carbonization and chemical activation. The ability of treated and untreated Ulvala ctuca, to remove hexavalent chromium Cr (VI) ions in aqueous solutions was investigated. The influence of pH, sorbent dose, initial concentration, temperature, and contact time has been studied in batch process. The materials are characterized by FTIR and SEM analysis. The highest Cr (VI) removals (100%) were achieved at pH of 3, particle size of less than 250μm, dose of 1 g/L, and equilibrium time of 180 minutes. Thermodynamic results indicated that the Cr (VI) adsorption process was spontaneous and exothermic. The adsorption data fit well with Langmuir isotherm model with a maximum adsorption capacities (qmax) of untreated and treated Ulva lactuca were between 0.6 and 2 mg/g. Higher Cr (VI) removal revealed the practical applicability of Ulva lactuca in water and wastewater treatment systems. |
| Databáze: | OpenAIRE |
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