Mechanism and kinetics of treatment of acid orange II by aged Fe-Si-B metallic glass powders

查看全文 作　　者：Xindong [1,2]Qin;Zhengkun [1]Li;Zhengwang [1]Zhu;Huameng [1]Fu;Hong [1]Li;Aimin [1]Wang;Hongwei [1]Zhang;Haifeng [1]Zhang

机构地区：[1]Institute of Metal Research, Chinese Academy of Sciences;[2]School of Materials Science and Engineering, University of Science and Technology of China

出　　处：《Journal of Materials Science & Technology》索引2017年第33卷第10期,共6页

基　　金：supported by the National Natural Science Foundation of China (Nos. 51434008, U1435204 and 51531005);the Youth Innovation Promotion Association CAS, Science and Technology Planning Project of Guangdong Province, China (Nos. 2015B090926001 and 2015B010122001);the Innovative Talents Planning Project of Jiangsu Province 摘　　要：The mechanism and kinetics of acid orange II(AOII) treated by aged gas-atomized Fe-Si-B metallic glass(MG) powders were investigated in this study. The decolorization reaction is shown to obey the pseudofirst-order kinetic model, and the treatment processes could be divided into two stages: a slow step followed by a rapid one. This observation is in accordance with the following results, the azo dye is simply adsorbed onto the Fe-based MG powders in the initial stage, because the oxide layer coated on the powder surface depresses the degradation reaction by covering the activity sites, and then the degradation occurs with the desquamation of the powders. The AOII could be degraded with a rapid reaction rate when the Fe-based MG powders are applied to the treatment process again, because of the consumption of the oxide layer and the unchanged core of the Fe-based MGs. These findings will promote the practical application of MGs in degrading azo dyes. 关键词：Metallic glasses Azo dyes DEGRADATION KINETICS

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Mechanism and kinetics of treatment of acid orange II by aged Fe-Si-B metallic glass powders

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