Fast Degradation and Biodegradability Improvement of Reactive Brilliant Red X-3B by the Cobalt(II)/Bicarbonate/Hydrogen Peroxide System

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• 作者：Zhen Yang ; Hong Wang ; Min Chen ; Muxi Luo ; Dongsheng Xia ; Aihua Xu ; Qingfu Zeng
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：August 29, 2012
• 年：2012
• 卷：51
• 期：34
• 页码：11104-11111
• 全文大小：384K
• 年卷期：v.51,no.34(August 29, 2012)
• ISSN：1520-5045

文摘

The cobalt(II)-bicarbonate (HCO₃^{鈥?/sup>) complex is a very efficient catalyst for organic dye decolorization with H₂O₂ as an oxidant, but its mineralization degree is very low. One interesting alternative is the combination of the system with a subsequent biological step. With the aim of employing the Co2+-HCO₃鈥?/sup> system as a pretreatment method to dye wastewater, a typical azo dye, reactive brilliant red X-3B (X-3B), was selected as the model compound, and the biodegradability enhancement of the dye was investigated. The results showed that X-3B was effectively degraded by the Co2+-HCO₃鈥?/sup> system under various mild conditions, and the BOD₅/COD ratio of the dye solution could markedly increase from 0.046 to higher than 0.46. The effluent treatment by the system was efficiently post-treated in a batch biological reactor with the COD removal around 44% after 8 h aeration, while a little decrease of the COD value of the raw solution was observed.}