Phosphate removal and recovery with calcined layered double hydroxides as an adsorbent

被引：20
|
作者：
Lv, Liang [1 ,2 ]
Sun, Peide [2 ]
Wang, Yulin [1 ]
Du, Hangen [2 ]
Gu, Tingting [1 ]
机构：
[1] Zhejiang Univ Technol, W Branch, Zhejiang 234000, Peoples R China
[2] Zhejiang Gongshang Univ, Coll Environm Sci Engn, Zhejiang, Peoples R China
来源：
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS | 2008年 / 183卷 / 2-3期
关键词：
adsorption; desorption; layered double hydroxides; phosphate; recovery;
D O I：
10.1080/10426500701761730
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The adsorption properties of calcined layered double hydroxide (denoted as CLDH) for phosphate and desorption for recovery phosphate were examined. The influences of chemical composition of adsorbents, adsorbent dose, and co-existing anions on the phosphate removal have been investigated. It has been found that the LDHs with Mg/Al molar ratio of 2 represented the highest capacity to remove phosphate from aqueous solution. Phosphate ion removal in presence of other ions decreases in the order CO32- < SO42- < F- < Cl-. Phosphate adsorbed on the CLDH was effectively desorbed at Na2CO3 solution and the CLDH were reconstruction to LDHs at the same time. Phosphate in the exhausted desorption solution was recovered as calcium phosphate by precipitation with Ca2+.
引用
收藏
页码：519 / 526
页数：8
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