Degradation of H-acid in aqueous solution by microwave assisted wet air oxidation using Ni-loaded GA

• 作 者: ZHANG Yao-bin QUAN Xie ZHAO Hui-min CHEN Shuo YANG Feng-lin
• 机 构: School of Environmental and Biological Science and Technology, Dalian University of Technology, Dali
• 出 处: 环境科学学报（英文版）
• 发表日期: 2005年3期
• 关键词: microwave degradation catalysis nickel wet air oxidation

A novel process, microwave assisted catalytic wet air oxidation(MW-CWO), was applied for the degradation of H-acid( 1-amino8-naphthol-3, 6-disulfonic acid) in aqueous solution. Ni-loaded granular activated carbon (GAG), prepared by immersion-calcination method, was used as catalyst. The results showed that the MW-CWO process was very effective for the degradation of H-acid in aqueous solution under atmospheric pressure with 87.4% TOC (total organic carbon) reduction in 20 min. Ni on GAC existed in the form of NiO as specified by XRD. Loss of Ni was significant in the initial stage, and then remained almost constant after 20 min reaction. BET surface area results showed that the surface property of GAC after MW-CWO process was superior to that of blank GAC.