铝镁混合金属氢氧化物溶胶阴离子交换性能研究

STUDIES ON ANION EXCHANGE PROPERTIES OF Al Mg MIXED METAL HYDROXIDE COMPOUNDS

本文研究了电解质对铝镁混合金属氢氧化物（Ａｌ－ＭｇＭＭＨ）溶胶粒子中Ｃｌ－和ＯＨ－的阴离子交换性能。在所研究的电解质ＮａＮＯ３，ＨＣＯＯＮａ，ＣＨ３ＣＯＯＮａ，Ｎａ２ＣＯ３，Ｎａ２ＳＯ４和Ｎａ３ＰＯ４中，发现高价阴离子的交换能力大于低价阴离子的交换能力，无机阴离子的交换能力大于有机阴离子的交换能力。所研究Ａｌ－ＭｇＭＭＨ溶胶粒子的阴离子交换容量为２．８２ｍｍｏｌ／ｇ，比粘土粒子的阳离子交换容量大得多。

The anion exchange properties of Cl - and OH - in Al Mg mixed metal hydroxide(Al Mg MMH) have been studied in this paper. Of the studied electrolytes such as NaNO 3, HCOONa, CH 3COONa, Na 2CO 3, Na 2SO 4 and Na 3PO 4, it was found that the exchange capabilities of high valence anions are larger than those of low valence anions and those of inorganic anions are larger than those of organic anions. The anion exchange capacity of studied Al Mg MMH is about 2.82 mmol/g , which is much larger than the cation exchange capacity of clays.