期刊论文详细信息
Química Nova | |
Oxidation of organic compounds in wastewater from the humid processing of coffee berries | |
Guerreiro, Mário César1  Oliveira, Luiz Carlos Alves1  Rocha, Cristian Luciana da1  Universidade Federal de Lavras, Lavras, Brasil1  Gonçalves, Maraísa1  | |
关键词: oxidation; niobia; iron oxide.; | |
DOI : 10.1590/S0100-40422008000700007 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
Materials based on pure iron oxide and impregnated with niobia (Nb2O5) were prepared. Their catalytic activities were tested on the oxidation of compounds present in the wastewater from the processing of coffee berries. Particularly caffeine and catechol were tested. The oxidation reactions were carried out with the following systems (i) UV/H2O2, (ii) photo-Fenton and (iii) heterogeneous Fenton. All materials were characterized with X-ray diffraction, Mössbauer and infrared spectroscopy. Iron was mainly in the forms of goethite and maghemite. The oxidation kinetics were monitored by UV-vis and the oxidation products were monitored by mass spectrometry. The photo-Fenton reaction presented highest oxidation efficiency, removing 98% of all caffeine and catechol contents.【 授权许可】
Unknown
【 预 览 】
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RO201912050594278ZK.pdf | 357KB | download |