Observations of the comparative hydrolysis/precipitation behaviour of polyferric sulphate and ferric sulphate

被引：89

作者：

Jiang, JQ ^{[1
]}

Graham, NJD ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Civil Engn, London SW7 2BU, England

来源：

WATER RESEARCH | 1998年 / 32卷 / 03期

关键词：

conventional coagulants; pre-polymerized coagulants; polyferric sulphate (PFS); ferric sulphate (FS); floc size development; the chemical structure of precipitates; the iso-electric point;

D O I：

10.1016/S0043-1354(97)83364-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The hydrolysis/precipitation behaviour of polyferric sulphate (PFS) and ferric sulphate (FS) under conditions typical for coagulation and flocculation in water treatment are investigated by studying the rate of floc size development; the zeta potential and chemical structure of precipitates and the iso-electric point of re-suspended precipitates. The results detailed in this study strongly suggest that, under the test conditions, the hydrolysis behaviour of PFS was significantly different from that of FS? with evidence of a relatively Io ir er rate of flee size development and colloid charge reversal in the investigated Fe(III) dose range and a different chemical structure of the precipitates formed from PFS and FS. (C) 1998 Published by Elsevier Science Ltd.

引用

页码：930 / 935

页数：6

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