Catalytic ozonation of organic compounds in water over the catalyst of RuO2/ZrO2-CeO2
Catalytic ozonation of organic compounds in water over the catalyst of RuO2/ZrO2-CeO2
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DOI：
10.1007/s11783-014-0706-5
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发表时间：
2015-06
影响因子：
6.4
通讯作者：
Jianbing Wang;Guoqing Wang;Chunli Yang;Shaoxia Yang;Qing Huang
中科院分区：
文献类型：
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作者：
Jianbing Wang;Guoqing Wang;Chunli Yang;Shaoxia Yang;Qing Huang
研究了RuO 2/ZrO 2-CeO 2催化臭氧化水处理的性能。结果表明，RuO 2/ZrO 2-CeO 2催化剂对草酸的臭氧化反应具有较好的催化活性，其稳定性优于RuO 2/Al 2 O3和Ru/AC。在催化臭氧氧化邻苯二甲酸二甲酯过程中，RuO 2/ZrO 2-CeO 2对邻苯二甲酸二甲酯的降解率没有显著提高，但对总有机碳（TOC）的去除率有显著提高。催化臭氧氧化对TOC的去除率比非催化臭氧氧化提高了56%。然而，这并不意味着催化剂非常活跃，因为催化对总TOC去除的贡献仅为30%。中间产物在RuO 2/ZrO 2-CeO 2上的吸附对总TOC的去除起着重要作用，而中间产物在RuO 2/ZrO 2-CeO 2上的吸附作用很小。这种吸附差异是由于它们的臭氧化速率不同。RuO 2/ZrO 2-CeO 2催化臭氧氧化消毒副产物前体时，天然水样中卤乙酸和三卤甲烷生成电位（HAAFPs和THMFPs）分别降低了38%~ 57%和50%~ 64%。催化剂显著促进HAAFP的还原，但不显著地改善THMFP的还原，因为臭氧与THMs前体快速反应。这些结果表明RuO 2/ZrO 2-CeO 2催化臭氧化水处理具有良好的应用前景。
This research investigates the performances of RuO2/ZrO2-CeO2in catalytic ozonation for water treatment. The results show that RuO2/ZrO2-CeO2was active for the catalytic ozonation of oxalic acid and possessed higher stability than RuO2/Al2O3and Ru/AC. In the catalytic ozonation of dimethyl phthalate (DMP), RuO2/ZrO2-CeO2did not enhance the DMP degradation rate but significantly improved the total organic carbon (TOC) removal rate. The TOC removal in catalytic ozonation was 56% more than that in noncatalytic ozonation. However this does not mean the catalyst was very active because the contribution of catalysis to the overall TOC removal was only 30%. The adsorption of the intermediates on RuO2/ZrO2-CeO2played an important role on the overall TOC removal while the adsorption of DMP on it was negligible. This adsorption difference was due to their different ozonation rates. In the catalytic ozonation of disinfection byproduct precursors with RuO2/ZrO2-CeO2, the reductions of the haloacetic acid and trihalomethane formation potentials (HAAFPs and THMFPs) for the natural water samples were 38%–57% and 50%–64%, respectively. The catalyst significantly promoted the reduction of HAAFPs but insignificantly improved the reduction of THMFPs as ozone reacts fast with the THMs precursors. These results illustrate the good promise of RuO2/ZrO2-CeO2in catalytic ozonation for water treatment.