Jishma P, Thomas Roshmi, Narayanan Rakhie, Radhakrishnan E K
School of Biosciences, Mahatma Gandhi University, PD Hills (PO), Kottayam, Kerala, 686 560, India.
Bioprocess Biosyst Eng. 2016 Jul;39(7):1033-40. doi: 10.1007/s00449-016-1581-1. Epub 2016 Mar 14.
Victoria blue B (VBB) belongs to triphenylmethane group of dyes, which is widely used in textile industries. Hence development of novel treatment methods are of considerable applications in its removal. In the current study, silver nanoparticles (AgNPs) formed by Bacillus amyloliquefaciens was investigated for the degradation of VBB. Interestingly, the UV-Vis spectroscopy analysis of VBB-AgNPs treated samples showed a decrease in absorption at 615 nm, which is characteristic of pure VBB. This time-dependent degradation process was further investigated by changing the initial dye concentration, AgNPs concentration and pH. Approximately 78 % of reduction was observed within 8 h of the study and hence the result of the study is with promising applications for the development of novel dye degradation technologies. Phytotoxicity analysis of degradation product using Vigna unguiculata revealed the non-toxic effect of degradation product when compared to VBB and this confirms the promising potential and applications of the study.
维多利亚蓝B（VBB）属于三苯甲烷类染料，广泛应用于纺织工业。因此，开发新的处理方法对其去除具有重要应用价值。在当前研究中，研究了由解淀粉芽孢杆菌形成的银纳米颗粒（AgNPs）对VBB的降解作用。有趣的是，对VBB-AgNPs处理样品的紫外可见光谱分析表明，在615nm处的吸收下降，这是纯VBB的特征。通过改变初始染料浓度、AgNPs浓度和pH值进一步研究了这种随时间的降解过程。在研究的8小时内观察到约78%的降解率，因此该研究结果对新型染料降解技术的开发具有广阔的应用前景。使用豇豆对降解产物进行的植物毒性分析表明，与VBB相比，降解产物无毒性作用，这证实了该研究具有广阔的潜力和应用前景。
