REMOVAL OF PHOSPHATE FROM WATERS BY PRECIPITATION AND HIGH-GRADIENT MAGNETIC SEPARATION

被引：23

作者：

SHAIKH, AMH ^{[1
]}

DIXIT, SG ^{[1
]}

机构：

[1] UNIV BOMBAY,DEPT CHEM TECHNOL,BOMBAY 400019,INDIA

来源：

WATER RESEARCH | 1992年 / 26卷 / 06期

关键词：

PHOSPHATE REMOVAL FROM WATER; PHOSPHATE REMOVAL WITH HGMS;

D O I：

10.1016/0043-1354(92)90016-W

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Orthophosphate and hexametaphosphate from waters have been removed by precipitation with aluminium sulphate and calcium nitrate, respectively, with subsequent removal by a high gradient magnetic separator using magnetite as the seeding material. The precipitation is strongly dependent on pH. The pH for maximum removal of orthophosphate was 4, whereas for hexametaphosphate the pH was 12. The maximum has been attributed to the predominance of hydroxy aluminium dihydrogen phosphate species in the case of orthophosphate and hydroxy apatite in the case of hexametaphosphate. The infrared spectra indicate the formation of these precipitates. The removal with a high gradient magnetic separator is very efficient and very large throughputs can be achieved.

引用

页码：845 / 852

页数：8

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