Wood (Bagassa guianensis Aubl) and green coconut mesocarp (cocos nucifera) residues as textile dye removers (Remazol Red and Remazol Brilliant Violet)
| Autor: | Robson Fernandes de Farias, Cícero Wellington Brito Bezerra, Sirlane A.A. Santana, Hildo Antonio dos Santos Silva, José Alberto Pestana Chaves, Mônica S. Monteiro |
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| Rok vydání: | 2017 |
| Předmět: |
Cocos
Environmental Engineering 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences symbols.namesake Adsorption Spectrophotometry Specific surface area medicine Freundlich equation Fiber Coloring Agents Waste Management and Disposal 0105 earth and related environmental sciences medicine.diagnostic_test Waste management Chemistry Textiles Langmuir adsorption model General Medicine Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology Wood Thermogravimetry Kinetics Cocos nucifera symbols 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of environmental management. 204(Pt 1) |
| ISSN: | 1095-8630 |
| Popis: | In this work the efficiency of two lignocellulosic waste materials, wood residues and coconut mesocarp, were investigated as adsorbents towards two representative textile dyes (Remazol Red, RR and Remazol Brilliant Violet, RBV). The moisture, carbohydrate, protein, lipid, ash and fiber contents of both natural matrices were characterized. The materials were also characterized by infrared spectroscopy, X-ray diffractometry, scanning electron microscopy, specific surface area analysis and thermogravimetry. The adsorption of dyes was monitored by using UV–Vis spectrophotometry. It was verified that both, coconut mesocarp (CM) and wood residues can act as effective adsorbents towards the investigated dyes. It is verified that the maximum adsorption capacity Γ M (mg g −1 ) for RBV and RR are 7.28 and 3.97 towards CM and 0.64 and 0.71 towrads SD. Furthermore, it was verified that the adsorption is strongly pH dependent and, as a general behavior, an increase in the pH value is associated with a decrease of the total amount of adsorbed dye. The adsorption of violet dye onto coconut mesocarp is well described by the Langmuir model, while all the remazol red fitted better with the Freundlich equation. |
| Databáze: | OpenAIRE |
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