含添加剂和氧化锌纳米颗粒的亚甲基蓝在水介质中的声化学分析

Md. Shaharul Islam, Md. Samiul Bari Avick, Jahangir Hossain, M. S. Alam, Md. Helal Uddin
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引用次数: 0

摘要

研究发现,使用超声波是一种非常适合且有效的降解有害染料的方法。为了弄清降解机理,我们研究了各种添加剂在水介质中通过超声波辐照降解染料分子的情况。在这项研究中,亚甲基蓝(MB)被用作偶氮染料的代表,NaCl 和 Na2SO4 等无机盐被用作添加剂。此外,还观察了在 CCl4 和 H2O2 溶液中的降解情况。氧化锌纳米粒子也被用于降解研究。所有溶液的体积都是 100 毫升,其中含有 25 毫克/升的甲基溴。染料分子的超声处理时间分别为 0、5、15 和 25 分钟。采用紫外可见光谱详细讨论了降解机理。实验表明,酸性条件有利于染料降解。在对结果进行评估时,我们还发现,所有添加剂对降解的帮助程度都相对较高或较低,这取决于它们在溶液中的用量。因此,这清楚地表明,在酸性条件下使用声化学辐照法可以有效去除废水中的偶氮染料。
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Sonochemical Analysis of Methylene Blue with Additives and ZnO Nanoparticles in Aqueous Medium
The use of ultrasound was found to be a very suitable and effective method for the degradation of hazardous dyestuffs. The degradation of dye molecules in aqueous media in the presence of various additives by ultrasonic irradiation was investigated in order to clarify the degradation mechanism. In this investigation, Methylene Blue (MB) has been used as a representative of azo dye and inorganic salts like NaCl and Na2SO4 were used as additives. Besides degradation in presence of CCl4 and H2O2 solutions were observed. ZnO nanoparticle was also used for the investigation of degradation. The volume of all solutions was 100ml containing 25mg/L of MB. The sonication of dye molecules were conducted for 0, 5, 15, 25 minutes. The degradation mechanism was discussed in details adopting UV- visible spectra. From the experiments it is clear that the acidic condition is favorable for dye degradation. Evaluating the results we have also found that all additives aided the degradation comparatively higher or lower the extent depending on their used amount in solution. So, it is a clear indication that azo dyes from waste water can be efficiently removed by using sonochemical irradiation method under acidic condition
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