Decolorization of azo dye Orange G by aluminum powder enhanced by ultrasonic irradiation
Decolorization of azo dye Orange G by aluminum powder enhanced by ultrasonic irradiation
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超声波增强铝粉脱色偶氮染料Orange G
DOI：
10.1016/j.ultsonch.2014.06.023
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发表时间：
2015-01-01
影响因子：
8.4
通讯作者：
Jin, Mi Cong
中科院分区：
文献类型：
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作者：
Cai, Mei Qiang;Wei, Xiao Qin;Jin, Mi Cong
研究了超声强化铝粉（AlP-UI）对偶氮染料橙子G（OG）的脱色作用。研究了初始pH值、初始OG浓度、AlP投加量、超声功率和过氧化氢（H2 O2）浓度等工艺参数对降解效果的影响。结果表明，在AlP-酸体系中，超声同时辐照OG水溶液可提高脱色率。在初始pH值为2.0-4.0、OG初始浓度为10-80 mg/L时，脱色率随超声功率的增加而降低，在500 ~ 900 W时，脱色率随超声功率的增加而增加。在0.5- 2.5g/L范围内，AIP的最佳投加量为2.0g/L。在Alp-UI体系中加入10-100 mM的H2 O2可显著提高Alp-UI体系的脱色率，最佳脱色率为0.1491 min（-1）。OG的脱色似乎主要涉及氧化步骤，N=N键的断裂，这通过在最佳测试的降解系统下OG的中间产物，苯胺和1-氨基-2-萘酚-6，8-二磺酸盐（通过LC-MS检测）进行了验证。（C）2014 Elsevier B. V.保留所有权利。
In this work, the decolorization of azo dye Orange G (OG) in aqueous solution by aluminum powder enhanced by ultrasonic irradiation (AlP-UI) was investigated. The effects of various operating operational parameters such as the initial pH, initial OG concentration, AlP dosage, ultrasound power and added hydrogen peroxide (H2O2) concentration were studied. The results showed that the decolorization rate was enhanced when the aqueous OG was irradiated simultaneously by ultrasound in the AlP-acid systems. The decolorization rate decreased with the increase of both initial pH values of 2.0-4.0 and OG initial concentrations of 10-80 mg/L, increased with the ultrasound power enhancing from 500 to 900 W. An optimum value was reached at 2.0 g/L of the AIP dosage in the range of 0.5-2.5 g/L. The decolorization rate enhanced significantly by the addition of hydrogen peroxide in the range of 10-100 mM to Alp-UI system reached an optimum value of 0.1491 min(-1). The decolorization of OG appears to involve primarily oxidative steps, the cleavage of N=N bond, which were verificated by the intermediate products of OG under the optimal tested degradation system, aniline and 1-amino-2-naphthol-6,8-disulfonate detected by the LC-MS. (C) 2014 Elsevier B.V. All rights reserved.