Mechanisms of boron removal with electrocoagulation

被引：17
作者：
Jiang, Jia-Qian [1 ]
Xu, Y.
Quill, K.
Simon, J.
Shettle, K.
机构：
[1] Univ Surrey, Sch English, Guildford GU2 7XH, Surrey, England
[2] Borax Europe Ltd, Guildford GU2 8XG, Surrey, England
来源：
ENVIRONMENTAL CHEMISTRY | 2006年 / 3卷 / 05期
关键词：
adsorption; boron removal; coagulation; electrocoagulation; precipitation; waste water treatment;
D O I：
10.1071/EN06035
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
This study aims to explore the mechanisms of boron removal by electrocoagulation (EC). The results demonstrate that adsorption and precipitation of boron by Al flocs are dominant mechanisms in boron removal using EC. The Al flocs that result from the EC process are found to be mainly composed of polymeric Al-13 polymers (43%) and to have a long-lasting positive charge. These characteristics of the flocs contribute to the high levels of boron removal observed using EC. The maximum boron adsorption of the Al flocs is 200 mg g(-1) and the solubility product constant (K-sp), which represents the boron precipitate Al(OH)(2)BO2.nH(2)O, is 2.6 x 10(-40) (at 20 degrees C).
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收藏
页码：350 / 354
页数：5
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