Dependence of Stability of Sr5(AsO4)3OH on pH Value

Author:

Huang Yan Hua1,Li Zong Ning2,Qin Hui3,Zhu Zong Qiang4,Zhu Yi Nian1,Dai Liu Qin1,Niu Yan Long5

Affiliation:

1. Guilin University of Technology

2. Guangxi Teamrun Energy-Saving Science and Technology Co. , Ltd

3. Guilin Lingui Urban Construction Inwestment Co.Ltd

4. Nanning Jianning Water Investment Group Co., Ltd

5. Guangxi Scientific Experimental Centre for Mining, Metallurgy and Environment, Guilin University of Technology

Abstract

The object of this work was to determine the solubility and stability of the synthetic Sr5(AsO4)3OH solid solution at 25°C and the different initial pHs (pH at 2, 6 and 9) by batch dissolution experiments. The results indicated that with the initial pH value of 2, 6 and 9, the reaction system reached equilibrium after 2880h, and by that time the pH value of the solution reached, 7.90, 8.74 and 8.27 respectively. The concentration of strontium and arsenic in the initial solution pH at 2 are higher than that of solutions pH at 6 and 9. While the concentration of strontium in neutral or alkaline solutions is low and stays unchanged.

Publisher

Trans Tech Publications, Ltd.

Reference10 articles.

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2. V. Chukhlantsev, Solubility products of arsenates, G. J. Inorg. Chem. 1(1956)1975-(1982).

3. T. Nishimura, K. Tozawa, On the solubility products of ferric, calcium and magnesium arsenates, Bull. Res. Inst. Min. Dress. Metall. Tohoku Univ. 34(1978)19–26.

4. Y. N. Zhu, B. Merkel, The Dissolution and Solubility of Scorodite, FeAsO4•2H2O-Evaluation and Simulation with PHREEQC, Wissenschaftliche Mitteilungen, 18(2001)72.

5. P. P. Mahapatra, L. M Mahapatra, B. Mishra, Solubility of calcium hydrogen arsenate in aqueous medium, Indian. J. Chem. 25A(1986)647–9.

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