CONGO RED REMOVAL FROM AQUEOUS EFFLUENTS BY ADSORPTION ON CHERRY STONES ACTIVATED CARBON
| Autor: | Cristina-Gabriela Grigoras, Andrei-Ionut Simion, Lucian Gavrila, Lidia Favier |
|---|---|
| Přispěvatelé: | University of Bacău Vasile Alecsandri, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Jonchère, Laurent, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law cherry stones activated carbon 01 natural sciences Freundlich isotherm chemistry.chemical_compound Adsorption [CHIM] Chemical Sciences medicine [CHIM]Chemical Sciences Effluent Congo Red dye 0105 earth and related environmental sciences 021110 strategic defence & security studies Aqueous solution Pollution 6. Clean water Congo red chemistry 13. Climate action Activated carbon medicine.drug Nuclear chemistry adsorption kinetics |
| Zdroj: | Environmental Engineering and Management Journal Environmental Engineering and Management Journal, "Gheorghe Asachi" Technical University of Iaşi, 2020, 19 (2), pp.247-254 Environmental Engineering and Management Journal, 2020, 19 (2), pp.247-254 |
| ISSN: | 1582-9596 1843-3707 |
| Popis: | International audience; Soluble dyes are intensively used in various industrial activities. They represent an important class of water pollutants from which they are rather difficult to remove. This paper focusses on the elimination of Congo Red (CR) ionic azo dye by adsorption on a low cost material. Cherry stones were used for activated carbon preparation by carbonization method. A temperature of 600 degrees C and a time of 4 h were found as adequate parameters for the physical activation and led to a final white powder with fine particles. The obtained product was put in contact with CR aqueous solutions having concentrations ranging between 200 mg/L and 1000 mg/L and pH values between 2 and 12 and the mixtures were magnetically agitated for periods of 10 to 180 minutes. The best results were recorded at acidic and neutral pH where the CR removal percentage was over 99 % while in alkaline environment the adsorption was negligible. The applied tests revealed that the process is well described by a pseudo-second-order kinetic model (with correlation coefficients close or equal to unity) and that Freundlich isotherm is suitable to insure a very good fit with the experimental data (with correlation coefficients values higher than 0.99). The acquired results proved that cherry stones (a rarely used waste from food industry) can constitute an interesting and adequate alternative for manufacturing inexpensive materials possessing adsorption properties with high capacity for dye removal from aqueous solutions. |
| Databáze: | OpenAIRE |
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