Degradation of dye wastewater in a thin-film photoelectrocatalytic (PEC) reactor with slant-placed TiO2/Ti anode.
Degradation of dye wastewater in a thin-film photoelectrocatalytic (PEC) reactor with slant-placed TiO2/Ti anode.
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DOI：
10.1016/j.cej.2009.01.002
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发表时间：
2009-08
影响因子：
15.1
通讯作者：
Y. Xu;J. Jia;D. Zhong;Yalin Wang
中科院分区：
文献类型：
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作者：
Y. Xu;J. Jia;D. Zhong;Yalin Wang
开发了倾斜放置 TiO2/Ti 阳极的薄膜光电催化 (PEC) 反应器，并成功应用于降解罗丹明 B (RhB) 和纺织废水。使用 5–150mgL−1RhB 溶液作为模型系统，薄膜 PEC 在 1 小时内将总色度和 TOC 去除率分别达到 99–28% 和 78–15%，远高于传统 PEC 的 82–7% 和 60% 至零。薄膜PEC工艺实现的处理效率提高归因于辐照光源的路径长度显着缩短。实验过程中保持废水循环，及时刷新TiO2/Ti阳极上的水膜，促进本体溶液中目标污染物和降解产物的传质。薄膜PEC反应器在紫外光照射下可以有效降解模拟和真实的染料废水。结果表明，薄膜 PEC 对于处理高浓度溶液特别优越。薄膜PEC反应器还被应用于在太阳光照射下有效处理RhB溶液。回收实验证明了倾斜放置的TiO2/Ti阳极具有优异的稳定性和可靠性。本研究提出了一种简单有效的方法来设计适用于工业染料废水处理的PEC反应器。
A thin-film photoelectrocatalytic (PEC) reactor with slant-placed TiO2/Ti anode was developed and successfully applied to degrade Rhodamine B (RhB) and textile effluent. Using a 5–150mgL−1RhB solution as the model system, thin-film PEC removed total color and TOC by 99–28% and 78–15%, respectively, in 1h, which is much higher than 82–7% and 60% to zero by conventional PEC. The enhanced treatment efficiency achieved by thin-film PEC process was attributed to the significantly reduced path length of irradiation light source. The wastewater was kept circulating during the experiments to timely refresh the aqueous film on the TiO2/Ti anode and promote the mass transfer of the target pollutants and the degradation products in the bulk solution. The thin-film PEC reactor can degrade both simulated and real dye wastewater efficiently under UV light irradiation. Results suggested that thin-film PEC was particularly superior for treating a high concentration solution. The thin-film PEC reactor was also applied to treat RhB solution efficiently under solar light irradiation. The recycle experiments demonstrated excellent stability and reliability of the slant-placed TiO2/Ti anode. This study proposed a simple and effective method to design PEC reactor applicable for industrial dye wastewater treatment.