کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
684079 | 889014 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Microwave assisted thermal treatment of defective coffee beans press cake for the production of adsorbents Microwave assisted thermal treatment of defective coffee beans press cake for the production of adsorbents](/preview/png/684079.png)
Defective coffee press cake, a residue from coffee oil biodiesel production, was evaluated as an adsorbent for removal of basic dyes (methylene blue – MB) from aqueous solutions. The adsorbent was prepared by microwave treatment, providing a significant reduction in processing time coupled to an increase in adsorption capacity in comparison to conventional carbonization in a muffle furnace. Batch adsorption tests were performed at 25 °C and the effects of particle size, contact time, adsorbent dosage and initial solution pH were investigated. Adsorption kinetics was better described by a second-order model. The experimental adsorption equilibrium data were fitted to Langmuir, Freundlich and Tempkin adsorption models, with Langmuir providing the best fit. The results presented in this study show that microwave activation presents great potential as an alternative method in the production of adsorbents.
Journal: Bioresource Technology - Volume 101, Issue 3, February 2010, Pages 1068–1074