Isopiestic Study of the Na2CrO4-H2O System at 353.15 K: Prediction of the Solubility of Na2CrO4 in Aqueous NaOH Solutions

被引：13

作者：

Jin, Wei ^{[1
,2
]}

Zheng, Shili ^{[1
]}

Du, Hao ^{[1
]}

Xu, Hongbin ^{[1
]}

Zhang, Yi ^{[1
]}

机构：

[1] Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2010年 / 49卷 / 17期

基金：

中国国家自然科学基金;

关键词：

CHEMICAL-EQUILIBRIUM MODEL; THERMODYNAMIC PROPERTIES; CHROMIUM; TEMPERATURE; COEFFICIENTS; REMEDIATION; CHROMATE; RANGE;

D O I：

10.1021/ie1011068

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The osmotic coefficients of the Na2CrO4-H2O system at 353.15 K were determined using isopiestic method ranging from 0.05 to 7.683 mol.kg(-1). The experimental osmotic coefficients were excellently correlated with Pitzer equation to obtain the interaction parameters, the activity coefficients, and the solubility product for Na2CrO4. Furthermore, the solubility of Na2CrO4 in NaOH solutions at 353.15 K was predicted using binary parameters, and the predicted values agree with the experimental data, demonstrating the Pitzer equation is capable of optimizing the processes for the removal and recovery of sodium chromate in NaOH solutions at high temperature.

引用

页码：8244 / 8247

页数：4

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