Layered double hydroxide (LDH)-coated attapulgite for phosphate removal from aqueous solution

被引：17

作者：

Gan Fang-qun ^{[1
,2
]}

Zhou Jian-min ^{[1
]}

Wang Huo-yan ^{[1
]}

Zhao Hong-ting ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China

[2] City Vocat Coll Jiangsu, Dept City Sci, Nanjing 210017, Jiangsu, Peoples R China

[3] E&E Appl Res LLC, Longmont, CO 80503 USA

来源：

WATER SCIENCE AND TECHNOLOGY | 2011年 / 64卷 / 11期

关键词：

attapulgite; granular; layered double hydroxide; phosphate; tap water; WATER; COLUMN; BED;

D O I：

10.2166/wst.2011.721

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, a composite adsorbent, layered double hydroxide (LDH)-coated attapulgite (LDH-AP), was synthesized and characterized. Its potential application for LDH stabilizer and phosphate (P) removal from aqueous solution was evaluated using the batch mode and continuous mode in a packed bed column. The batch experiments revealed that the data of P adsorption onto LDH-AP could be well described by the Freundlich equation, and the maximum adsorption capacity was estimated to be 6.9 mg/g. The column experiments were conducted in the tap water and the results indicated that the competing anions could slightly decrease phosphate removal. The saturated column was regenerated by 0.2 mol/L of NaOH and the regenerated column was examined for its reuse in phosphate removal. The results of this study suggested that attapulgite could be used as an applicable stabilizer of LDH and LDH-AP could be potentially used as a promising filtration medium for phosphate removal.

引用

页码：2192 / 2198

页数：7

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