標題: Microwave-granular activated carbon (MW-GAC) system for carbofuran degradation: Analysis of characteristics and recyclability of the spent GAC
作者: Remya, Neelancherry
Lin, Jih-Gaw
環境工程研究所
Institute of Environmental Engineering
關鍵字: Carbofuran;Recyclability;Granular activated carbon;Degradation;Microwave
公開日期: 6-Feb-2015
摘要: Granular activated carbon (GAC) is frequently used to remove pollutants from wastewater. However, the mechanism of pollutant removal by GAC is by adsorption and hence spent GAC should be regenerated and used for several cycles for minimizing the cost of treatment. In the present study, the characteristics of GAC and carbofuran removal mechanism were explored in a microwave-GAC (MW-GAC) system. Carbofuran removal by adsorption was 52% at a GAC loading of 0.8g/L. However, complete carbofuran degradation from aqueous solution as well as from GAC surface was obtained within 30min in a MW-GAC system. In addition, A COD removal efficiency of 72% was observed in the MW-GAC system at pH 8 and 80 degrees C after 30min. The degradation occurred mainly through cleavage of carbamate group and oxidation of furan ring. Carbofuran removal by adsorption was enhanced with MW exposed GAC due to the improvement in the surface property on exposure to MW. On the other hand, recyclability of MW exposed GAC in the MW-GAC system indicated > 99% degradation of carbofuran in all the three cycles tested. As a whole, complete degradation of carbofuran and the effective recycling of the spent GAC could be achieved in the MW-GAC system.
URI: http://dx.doi.org/10.1080/19443994.2013.855673
http://hdl.handle.net/11536/124335
ISSN: 1944-3994
DOI: 10.1080/19443994.2013.855673
期刊: DESALINATION AND WATER TREATMENT
Volume: 53
起始頁: 1621
結束頁: 1631
Appears in Collections:Articles