| 臭氧光催化降解地下水中天然有机物的研究 |
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| 引用本文： | 简丽,张彭义,毕海.臭氧光催化降解地下水中天然有机物的研究[J].环境工程学报,2006,7(8):18-22. |
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| 作者姓名： | 简丽 张彭义 毕海 |
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| 作者单位： | 清华大学环境科学与工程系,北京,100084 |
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| 基金项目： | 高比容电子铝箔的研究开发与应用项目
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"新世纪优秀人才支持计划"资助项目 |
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| 摘 要： | 在现场开展了中试规模的臭氧光催化降解天然有机物的研究.研究表明,对大分子天然有机物占很大比例且重碳酸盐含量较高的地下水,臭氧投加量10 mg/L和反应时间10 min条件下,TOC的去除率不到20%,但UV254和三卤甲烷生成潜力(THMFP)去除率分别达到近60%和33.5%.臭氧光催化与活性炭吸附相连,能显著提高UV254的THMFP的去除率,但TOC去除率并不明显高于单独活性炭吸附.臭氧光催化使大分子有机物转化为小分子有机物,后者在活性炭上的吸附性提高且生化性改善,可望在生物活性炭上更有效地去除.
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| 关 键 词： | 臭氧光催化 活性炭 天然有机物 腐殖质 分子量分布 |
| 文章编号： | 1008-9241(2006)08-0018-05 |
| 修稿时间： | 2005年5月31日 |
Degradation of natural organic matter in groundwater by O3/TiO2/UV |
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| Jian Li,Zhang Pengyi,Bi Hai.Degradation of natural organic matter in groundwater by O3/TiO2/UV[J].Techniques and Equipment for Environmental Pollution Control,2006,7(8):18-22. |
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| Authors: | Jian Li Zhang Pengyi Bi Hai |
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| Abstract: | A pilot scale ozone enhanced photocatalytic(O_3/TiO_2/UV) degradation of natural organic matter(NOM) was conducted on site.It was showed that,for the groundwater with high concentration bicarbonate and high ratio of macro molecules,its TOC removal was less than when the ozone dosage was 10 mg/L and retention time was 10 min.However,UV_(254) and THMFP were reduced nearly 60% and 33.5% respectively.When followed with GAC,UV_(254) and THMFP were much better reduced while TOC was not as compared with GAC alone.Macro molecules were transformed to smaller organic compounds by O_3/TiO_2/UV,which was much better absorbed by GAC and had improved biodegradability.Thus,it was predicted that O_3/TiO_2/UV-BAC would be better than O_3/TiO_2/UV-GAC especially for TOC removal. |
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| Keywords: | ozone enhanced photocatalysis activated carbon natural organic matter humic substances molecule weight distribution |
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