The Heterogeneous Reaction of Calcinated Alunite Powder with Ammonium Buffer Solution

[摘要] Calcinated alunite powder (surface area 5100 cm2/g) was found to react with well stirred ammonium buffer solution (pH 8.0) following Jander's equation. The rate constants increase with the amount of solid and temperature of reaction system. The energy of activation for the reactions (at 30~60 ¡É) was 15.7 kcal/mole. The rate-determining step appears to involve ionization of alunite.

[学科分类] 化学（综合）