ADSORPTION OF PHOSPHATE FROM AQUEOUS SOLUTIONS BY THERMALLY MODIFIED PALYGORSKITE

被引：0
|
作者：
Xie, Jingjing [1 ]
Chen, Tianhuhu [1 ]
Qing, Chengsong [1 ]
Chen, Dong [1 ]
Zhu, Chengzhu [1 ]
Wang, Jiayuan [1 ]
Zhan, Xinmin [1 ,2 ]
机构：
[1] Hefei Univ Technol, Sch Resources & Environm Engn, Hefei, Peoples R China
[2] Natl Univ Ireland, Dept Civil Engn, Galway, Ireland
来源：
ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL | 2013年 / 12卷 / 07期
基金：
中国国家自然科学基金;
关键词：
adsorption; palygorskite; phosphate; thermal treatment; SYNTHETIC WASTE-WATER; PHOSPHORUS REMOVAL; ALUMINUM-OXIDE; IRON; ADSORBENT; HYDROXIDE; SLAG; PERFORMANCE; MECHANISMS; SEPIOLITE;
D O I：
暂无
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, palygorskite clay calcinated at different temperatures from 200 to 900 degrees C was used as adsorbent to remove phosphate from aqueous solutions. The crystal structure and the surface property of the thermally modified material was investigated to determinate the relationship between the adsorption capacity of the adsorbent and the changes of the crystal structure and surface property. The results indicate that palygorskite clay calcinated at 700 degrees C had the highest adsorption capacity. Complete dehydroxylation destroyed the crystal structure and Al coordination was changed from octahedral to tetrahedral and further to a small amount of penta-coordination. The thermally modified adsorbent material was amorphous. All these structure changes enhanced the activity of Al and phosphate adsorption.
引用
收藏
页码：1393 / 1399
页数：7
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