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Promotion by humus-reducing bacteria for the degradation of UV254 absorbance in reverse-osmosis concentrates pretreated with O3-assisted UV-Fenton method
- Xia, Jiaohui, Zhang, Hui, Ding, Shaoxuan, Li, Changyu, Ding, Jincheng, Lu, Jie
- Environmental technology 2018 v.39 no.17 pp. 2178-2184
- absorbance, bacteria, environmental technology, humic substances, pH, pollutants
- The primary pollutants in reverse-osmosis concentrates (ROC) are the substances with the UV absorbance at 254 nm (UV₂₅₄), which is closely related to humic substances that can be degraded by humus-reducing bacteria. This work studied the degradation characteristics of humus-reducing bacteria in ROC treatment. The physiological and biochemical characteristics of humus-reducing bacteria were investigated, and the effects of pH values and electron donors on the reduction of humic analog, antraquinone-2, 6-disulfonate were explored to optimize the degradation. Furthermore, the O₃-assisted UV-Fenton method was applied for the pretreatment of ROC, and the degradation of UV₂₅₄ absorbance was apparently promoted with their removal rate, reaching 84.2% after 10 days of degradation by humus-reducing bacteria.