Studies on the Stability of Aluminium Magnesium Hydroxide Positive Sol

Chem. J. Chinese Universities ›› 2000, Vol. 21 ›› Issue (10): 1575.

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Studies on the Stability of Aluminium Magnesium Hydroxide Positive Sol

YU Yue-Qin¹, WU Yu-Min¹, HOU Wan-Guo², ZHANG Chun-Guang², WANG Guo-Ting²

1. Department of Chemical Engineering, Shandong Institute of Light Industry, Jinan 250100, China;
2. Key Laboratoryf or Colloid and Interface Chemistryof Education Ministry, Shandong University, Jinan 250100, China

Received:1999-08-11 Online:2000-10-24 Published:2000-10-24

Abstract

Abstract: The potential equation in the positive sol of aluminium magnesium hydroxide was deduced according to the model of constant surface charge density, and the potential curves in the NaBr solution were obtained. The studies of coagulation kinetics showed that the coagulation process of monovalent anions may be divided into a rapid and slow coagulation. The efficiencies in causing coagulation for monovalent anions followed the order Br^->I^->NO₃^->Cl^-, which didn't correspond to the lyotropic series. The coagulation value of polyanion had a discrepancy with Shulze-Hardy law. The higher the cation valent was, the stronger the stabilization of sol was.

Key words: Aluminium magnesium hydroxide, Positive sol, Coagulation, Stability

CLC Number:

O618.14

TrendMD:

YU Yue-Qin, WU Yu-Min, HOU Wan-Guo, ZHANG Chun-Guang, WANG Guo-Ting. Studies on the Stability of Aluminium Magnesium Hydroxide Positive Sol[J]. Chem. J. Chinese Universities, 2000, 21(10): 1575.

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Studies on the Stability of Aluminium Magnesium Hydroxide Positive Sol

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