| 强化混凝中不同分子质量有机物的变化特点 |
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| 引用本文： | 董秉直,曹达文,范瑾初.强化混凝中不同分子质量有机物的变化特点[J].工业水处理,2003,23(9):41-43. |
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| 作者姓名： | 董秉直 曹达文 范瑾初 |
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| 作者单位： | 同济大学污染控制与资源化研究国家重点实验室,上海,200092 |
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| 摘 要： | 采用三氯化铁作为混凝剂，通过变化投加量和pH，考察各个分子质量区间的DOC和UV254的变化情况，了解强化混凝去除有机物的效果和机理。增加混凝剂的投加量能有效地促进各分子质量区间的UV254的去除，但对DOC的去除效果较差。三氯化铁对小分子质量的有机物具有很好的去除效果，总去除率的至少50％为去除小分子质量有机物所贡献。降低pH能有效地促进各分子质量区间的DOC和UV254的去除，去除有机物的最佳pH为5．5。在最佳的pH下，小分子质量的有机物得到了最大限度的去除。
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| 关 键 词： | 强化混凝 分子质量 有机物 三氯化铁 混凝剂 水污染 污染治理 |
| 文章编号： | 1005-829X(2003)09-0041-03 |
| 修稿时间： | 2002年7月25日 |
Characteristics of the changes in every molecular weight distribution of organics by enhanced coagulation |
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| Dong Bingzhi,Cao Dawen,Fan Jinchu.Characteristics of the changes in every molecular weight distribution of organics by enhanced coagulation[J].Industrial Water Treatment,2003,23(9):41-43. |
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| Authors: | Dong Bingzhi Cao Dawen Fan Jinchu |
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| Abstract: | Ferric chloride is u sed as a coagulant in this study.With varying dosage of coagulant and pH,the variation of DOC and UV 254 in every molecular weight region have been investigated to understand the e fficiency and mechanism of removing organics by enhanced coagulation.Increased dosage can remove UV 254 more effective-ly than DOC for every molecular weight region.Smaller than 1k molecular weight of organics is removed effec-tively by ferric chloride,w hich account for at least50%of overall rate of removal.Decreased pH can rem ove bo-th DOC and UV 254 effectively.Optimal pH for the removal of organics is5.5,at which small molecular weight or-ganics is removed to a great extent. |
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| Keywords: | enhanced coagulation molecular weight distribution of organics ferric chloride DOC UV |
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