Formation of a silicato complex of zinc in aqueous solution and its accelerating effect on the formation of silica scales in cooling water systems

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:353

Article

Naren, Gaowa¹  Nishida, Ikuko^1,2  Shimada, Yuuki¹  Tsuji, Yutaka³  Bai, Shuqin^1,4  Okaue, Yoshihiro¹  Yokoyama, Takushi¹ 

[1] Kyushu Univ, Dept Chem, Fac Sci, Higashi Ku, Fukuoka 8128581, Japan

[2] Kurita Water Ind Ltd, Nogi 3290105, Japan

[3] Kurume Natl Coll Technol, Kurume, Fukuoka 8308555, Japan

[4] Inner Mongolia Univ, Coll Environm & Resources, Saihan Qu 010021, Huhhot, Peoples R China

关键词: Silica scales;    Cooling water systems;    Zinc;    Silicato complex of zinc (SCZ);   

DOI  :  10.1016/j.jcis.2010.09.054

来源: Elsevier

【 摘 要 】

This study elucidates the effect of zinc (Zn), which is an anticorrosive water additive, on the formation of silica scales from cooling water. In these experiments, the silica scales were analyzed by EPMA, and the results indicate that Zn is sorbed into the silica scales during formation. Measurements of the solubility of Zn(OH)(2) at various concentrations of silicic acid demonstrate that Zn is present as a silicato complex of Zn (SCZ) in cooling water. From adsorption experiments of the SCZ on silica and alumina, which are major components of the silica scales, it can be concluded that the SCZ accelerates the formation of silica scales from cooling water. (c) 2010 Elsevier Inc. All rights reserved.

【 授权许可】

Free