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https://hdl.handle.net/1822/41901
Título: | Grapefruit peelings as a promising biosorbent for the removal of leather dyes and hexavalent chromium |
Autor(es): | Rosales, E. Meijide, J. Tavares, T. Pazos, M. Sanromán, M. A. |
Palavras-chave: | Grapefruit peelings Adsorption Tannery effluent H2O2 Pretreatment H O 2 2 |
Data: | Mai-2016 |
Editora: | Institution of Chemical Engineers (IChemE) |
Revista: | Process Safety and Environmental Protection |
Citação: | Villanueva, E.; Meijide, J.; Tavares, T.; Currás, M.; Sanromán, M. A., Grapefruit peelings as a promising biosorbent for the removal of leather dyes and hexavalent chromium. Process Safety and Environmental Protection, 101, 61-71, 2016 |
Resumo(s): | The objective of this study was to find a suitable and versatile agroforestry waste as alternative low-cost biosorbents for the removal of inorganic and organic compounds present in the wastewater of tannery industry [leather dyes and Cr(VI)]. Grapefruit peelings, fern, eucalyptus barks, oak leaves and cane pruning of grapevines were evaluated as biosorbents. Among them, grapefruit peelings showed the best results reaching 45 and 55% for the mixture of dyes and Cr(VI), respectively. A significant improvement in the performance of this biosorbent was obtained when it was pretreated with H2O2 (1M) attaining the highest removal capacity of 80% and 100%, respectively. This biosorbent was characterised showing an adsorption capacity of 1.1003meq/g and pHZPC 3.48. The adsorption working parameters, kinetics and isotherms were deeply studied in order to scale up the process to a continuous treatment system. Adsorption isotherms data fitted well to the Langmuir model with a maximum uptake of 37.427mg/g for dyes mixture and 39.0628mg/g for Cr(VI). Finally, the dynamic behaviour of the system, operating at different flow rates, was evaluated using a Homogeneous Surface Diffusion Model. Pretreated grapefruit peelings demonstrated to be a suitable low-cost biosorbent in the treatment of wastewater of tannery industry. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/41901 |
DOI: | 10.1016/j.psep.2016.03.006 |
ISSN: | 0957-5820 |
e-ISSN: | 1744-3598 |
Versão da editora: | http://www.psep.ichemejournals.com/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_37927_1.pdf | 1,26 MB | Adobe PDF | Ver/Abrir |