HCa2Nb3O10•1.5H2O as an ion exchanger for NH4+ ion removal

被引：11

作者：

Chitrakar, Ramesh ^{[1
]}

Tezuka, Satoko ^{[1
]}

Sonoda, Akinari ^{[1
]}

Kakita, Hirotaka ^{[1
]}

Sakane, Kohji ^{[1
]}

Ooi, Kenta ^{[1
]}

Hirotsu, Takahiro ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Hlth Technol Res Ctr, Takamatsu, Kagawa 7610395, Japan

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2008年 / 47卷 / 01期

关键词：

D O I：

10.1021/ie0704389

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The removal of NH4+ on protonated layered perovskite oxide HCa2Nb3O10 center dot 1.5H(2)O from-an aqueous solution at room temperature using a batch method was investigated. The protons situated between the layers of the material are exchangeable with cations in solution. Distribution coefficient values, K-d (cm(3)/g), of Na+, K+, and NH4+ cations at pH 2.2 from a mixed solution (NaCl, KCl, and NH4Cl) containing 1.0 mmol/dm(3) of each ion were 1600 for K+; 2200 for Na+, and 10 500 for NH4+. The effect of solution pH on the ion exchange in aqueous solution (NH4Cl + HCl or NH4OH) showed a maximum uptake of 34 mg of NH4/g at around pH 6. The results indicate that the material is very effective for removing NH4+ at concentrations of less than 10 mg of NH4/dm(3).

引用

页码：176 / 179

页数：4

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