期刊
WATER RESEARCH
卷 44, 期 6, 页码 1893-1899出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2009.11.029
关键词
Al-13 polymer; Flocs breakage; Flocs re-growth; Humic acid
资金
- National Major Special Technological Programmes Concerning Water Pollution Control [2006BAJ08B05]
- Management in the Eleventh Five-year Plan Period [2008ZX07422-003-02]
- Chinese National Foundation of Natural Sciences [50678095, 50808114]
The breakage and re-growth of flocs formed by polyaluminum chloride (PAC) and the Al13O4 (OH)(24)(7+) (Al-13 for short) polymer were comparatively evaluated for the coagulation of humic acid (HA). A series of jar experiments were conducted to investigate the impacts of shear rate and solution pH on flocs breakage and re-aggregation potential. Results indicated that the responses of flocs to the increasing shear force and solution pH depend on the coagulant used. The ability of flocs to resist breakage decreased with the increasing shear rate. For all levels of shear force investigated in this study, the flocs formed by Al-13 polymer were weaker than those of PAC, whereas Al-13 polymer displayed a better recoverability than PAC. The similar results were obtained when pH of solution was changed. The flocs generated in acidic conditions were stronger and more recoverable than those generated in alkaline conditions no matter which coagulant was used. (C) 2009 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据