Coagulation of humic acid: The performance of preformed and non-preformed Al species
Coagulation of humic acid: The performance of preformed and non-preformed Al species
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腐植酸的凝结：预成型和非预成型铝物质的性能
DOI：
10.1016/j.colsurfa.2006.09.037
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发表时间：
2007-03
影响因子：
5.2
通讯作者：
Zhu, Zhe
中科院分区：
文献类型：
--
作者：
Wei, Qunshan;Tang, Hongxiao;Shi, Baoyou;Wang, Dongsheng;Zhu, Zhe
无机聚合铝混凝剂因其pH值和温度适用范围广、电荷中和能力高、碱消耗少等优点，在水处理中得到了广泛的应用。然而，由于天然有机物的复杂性和此类聚合铝混凝剂的多样性，此类混凝剂对溶解有机物（DOM）的去除尚未得到充分了解。本文制备了具有不同Al形态特征的混凝剂来对腐殖酸（HA）进行混凝。所用的腐植酸源自泥炭并进行了物理化学表征。结果表明，含有预制铝物质的混凝剂在去除大分子和疏水性腐殖酸方面不如常规铝盐有效。由预形成的铝物质形成的絮凝体比由常规铝盐形成的絮凝体小。降低pH值可以提高所有混凝剂的混凝性能。腐植酸的凝结可能不遵循与矿物胶体凝结相同的电荷中和规则。在腐殖酸存在下，混凝过程中Al13会分解。
Inorganic polymeric Al coagulants have been being widely used in water treatment due to their advantages of applicability within broad pH and temperature ranges, high capacity of charge neutralization as well as less alkalinity consumption. However, the removal of dissolved organic matter (DOM) by such kind of coagulants has not been well understood because of the complexity of natural organic matter and the diversity of such polymeric Al coagulants. In this paper, coagulants with different Al speciation characteristics were prepared to conduct coagulation of humic acid (HA). The humic acid used was peat origin and was characterized physicochemically. The results showed that coagulants with preformed Al species were less effective than conventional Al salt in removing humic acid with large molecular and hydrophobic properties. The flocs formed by preformed Al species were smaller than those formed by conventional Al salt. Decreasing pH could improve the coagulation performance of all coagulants. Coagulation of humic acid might not follow the same charge neutralization rules associated with coagulation of mineral colloids. In the presence of humic acid, Al13could be decomposed during coagulation process.
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影响因子：
12.8
作者：
V. Kazpard;Bruno Lartiges;Céline Frochot;J. B. D. D. L. Caillerie-J.-B.-D.-D.-L.-Caillerie-2275097272;M. Viriot;Jean-Michel Portal;Tatiana Görner;J. Bersillon
通讯作者：
V. Kazpard;Bruno Lartiges;Céline Frochot;J. B. D. D. L. Caillerie-J.-B.-D.-D.-L.-Caillerie-2275097272;M. Viriot;Jean-Michel Portal;Tatiana Görner;J. Bersillon
影响因子：
2.7
作者：
J. K. Edzwald
通讯作者：
J. K. Edzwald
影响因子：
9.9
作者：
GREGORY, J
通讯作者：
GREGORY, J
影响因子：
9.9
作者：
L. Rizzo;V. Belgiorno;M. Gallo;S. Meriç
通讯作者：
L. Rizzo;V. Belgiorno;M. Gallo;S. Meriç
影响因子：
3.4
作者：
A. Zouboulis;G. Traskas
通讯作者：
A. Zouboulis;G. Traskas