REGENERATION BY SURFACE-COATING OF BONE CHAR USED FOR DEFLUORIDATION OF WATER

被引：26

作者：

CHRISTOFFERSEN, J ^{[1
]}

CHRISTOFFERSEN, MR ^{[1
]}

LARSEN, R ^{[1
]}

MOLLER, IJ ^{[1
]}

机构：

[1] WHO,REG OFF EUROPE,DK-2100 COPENHAGEN 0,DENMARK

来源：

WATER RESEARCH | 1991年 / 25卷 / 02期

关键词：

DEFLUORIDATION; WATER; BONE CHAR; REGENERATION; FLUORIDE; SURFACE-COATING;

D O I：

10.1016/0043-1354(91)90033-M

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A bone char column used to defluoridate water can be very simply and repeatedly regenerated without significant loss of binding capacity for fluoride or of efficiency. The regenerating solution contains calcium chloride and sodium dihydrogen phosphate with pH adjusted to about 3. The regenerating solution can also be produced by dissolving the present waste part of the bone char product, which is too finely powderized for use in the column, in dilute hydrochloric acid. During regeneration, most of the pre-adsorbed fluoride is retained by the bone char and the precipitating phase is apatitic. The "regeneration" is thus a surface-coating process.

引用

页码：227 / 229

页数：3