Microwave-assisted regeneration of activated carbons loaded with pharmaceuticals

被引：137

作者：

Ania, C. O. ^{[1
]}

Parra, J. B. ^{[1
]}

Menendez, J. A. ^{[1
]}

Pis, J. J. ^{[1
]}

机构：

[1] CSIC, Inst Nacl Carbon, E-33080 Oviedo, Spain

来源：

WATER RESEARCH | 2007年 / 41卷 / 15期

关键词：

microwave regeneration; activated carbon; pharmaceuticals; wastewater;

D O I：

10.1016/j.watres.2007.05.006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The purpose of this work was to explore the application of microwaves for the regeneration of activated carbons spent with salicylic acid, a metabolite of a common analgesic frequently found in wastewater from the pharmaceutical industry. The exhausted carbon was treated in a quartz reactor by microwave irradiation at 2450 MHz at different temperatures and atmospheres, the regeneration efficiency being highly dependent on the operating conditions. Quantitative desorption of the pollutant was achieved at high temperature and oxidizing atmosphere, with regeneration efficiencies as high as 99% after six cycles. The stripping efficiency was superior to 95% at high temperatures and decreased at 450 degrees C. The incomplete desorption of the adsorbate at low temperature was further confirmed by the changes in the porosity observed by N-2 and CO2 adsorption isotherms. Hence, micropores remain blocked which results in a reduction in loading capacities in successive cycles. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3299 / 3306

页数：8

共 32 条

[1] Pyrolysis of activated carbons exhausted with organic compounds [J].