State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, 163 Qixia Road, Jiangsu Nanjing 210023, China.
Water Sci Technol. 2013;67(8):1880-5. doi: 10.2166/wst.2013.057.
Interior microelectrolysis (IM) as a pretreatment process was effective to treat Reactive Black 5 (RB5) in this study. The removal rates of chemical oxygen demand (COD), total organic carbon (TOC) and color were 46.05, 39.99 and 98.77%, respectively, when this process was conducted under the following optimal conditions: the volumetric ratio between iron scraps and active carbon (AC) (V(Fe)/V(C)) 1.0, pH 2.0, aeration dosage 0.6 L/min, and reaction time 100 min. Contaminants could be further removed by ozonation. After subsequent ozonation for 200 min, the solution could be completely decolorized, and the COD and TOC removal rates were up to 77.78 and 66.51%, respectively. In addition, acute toxicity tests with Daphnia magna showed that pretreatment by IM generated effluents that were more toxic when compared with the initial wastewater, and the toxicity was reduced after subsequent ozonation.
本研究采用内电解（IM）作为预处理工艺，有效处理活性黑 5（RB5）。当该工艺在以下最佳条件下进行时，COD、TOC 和颜色的去除率分别为 46.05%、39.99%和 98.77%：铁屑与活性炭（AC）的体积比（V（Fe）/V（C））为 1.0，pH 值为 2.0，曝气剂量为 0.6 L/min，反应时间为 100 min。臭氧氧化可进一步去除污染物。随后进行 200 min 的臭氧氧化后，溶液可完全脱色，COD 和 TOC 的去除率分别达到 77.78%和 66.51%。此外，利用大型溞进行的急性毒性试验表明，与初始废水相比，IM 预处理生成的废水具有更高的毒性，而随后的臭氧氧化降低了毒性。
