In this paper, the iron hydroxide colloid has been prepared with iron trichloride and urea as the materials, Four major factors which have influece on pepization were determined, and optimum conditions of preparation of the colloid were determined with the absorbancy and precipitation weight of the colloid by means of orthogonal experiment.

Study on preparing stable aluminium hydroxide sol through aluminium by nitric acid;

The methods of preparing stable boehmite sol and zirconium hydroxide sol by anionic exchange method using inorganic compounds as raw materials were investigated in this dissertation,and forming-membrane capability of the sols were also investigated on the base of the it.

Preliminary study on the arsenic adsorption by ferric hydroxide colloid;