催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (9): 779-782.

• 研究论文 • 上一篇    下一篇

TiO2/UV/O3-BAC工艺去除水源水中的有机污染物

李来胜1,祝万鹏2,张彭义2,张秋云1   

  1. 1 华南师范大学化学与环境学院, 广东广州 510006; 2 清华大学环境科学与工程系, 北京 100084
  • 收稿日期:2007-09-25 出版日期:2007-09-25 发布日期:2011-09-28

Removal of Organic Pollutants from Raw Water by Combined Process of TiO2-Photocatalytic Ozonation and Biologically Activated Carbon

LI Laisheng1*, ZHU Wanpeng2, ZHANG Pengyi2, ZHANG Qiuyun1   

  1. 1 School of Chemistry and Environment, South China Normal University, Guangzhou 510006, Guangdong, China; 2 Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2007-09-25 Online:2007-09-25 Published:2011-09-28

PDF

1036

被引次数

18

摘要： 将TiO2光催化臭氧氧化-生物活性炭(TiO2/UV/O3-BAC)组合工艺用于处理水源水,在优化工艺参数的条件下,该工艺对水源水中溶解性有机碳(DOC)的平均去除率为46.5%, 而UV/O3-BAC工艺对DOC的平均去除率仅为41.6%. TiO2/UV/O3-BAC工艺对有机物去除的协同效应较强. TiO2/UV/O3过程将水中的大分子有机物氧化成小分子,提高了出水的可生物降解性,从而有利于后续的BAC对有机污染物的去除. TiO2/UV/O3-BAC工艺对持久性有机污染物的去除非常有效. 其中,酞酸酯的去除率均大于94%, 但随着烷基链长度的增加而降低; 多溴联苯的去除率均超过89%, 但随着溴原子取代数目的增加而降低.

关键词: 二氧化钛, 光催化臭氧氧化, 生物活性炭, 水源水, 酞酸酯, 多溴联苯

Abstract: Removal of organic pollutants from raw water by a combined process of TiO2-photocatalytic ozonation and biologically activated carbon (TiO2/UV/O3-BAC) was investigated. The TiO2/UV/O3 process decomposed macromolecule organic compounds into small molecules and increased their biodegradability. Under the optimum conditions, the dissolved organic carbon (DOC) was removed by 46.5% in the TiO2/UV/O3-BAC process, but the DOC was removed by only 41.6% in the UV/O3-BAC process. Compared with the UV/O3-BAC process, the synergetic effect of the TiO2/UV/O3-BAC process was stronger. The TiO2/UV/O3-BAC process was effective in removing phthalate esters, and their removal ratio reached more than 94% but decreased with the increase in the length of the alkyl side chains and the alkyl branch chains. The TiO2/UV/O3-BAC process was also very effective in removing polybromobiphenyls, and their removal ratio reached more than 89% but decreased with the increase in substitutional bromine atoms except for 2,2′,5,5′-tetrabromobiphenyl, which could be completely removed.

Key words: titania, photocatalytic ozonation, biologically activated carbon, raw water, phthalate ester, polybromobiphenyl