镁铝型水滑石的合成及其对溴离子的吸附

Preparation of Mg-Al hydrotalcite and its capability for bromide anion

采用共沉淀法合成镁铝型水滑石,并用红外光谱对水滑石进行了表征。研究了镁铝型水滑石对溴离子的吸附性能,考察了吸附剂用量、吸附时间、吸附温度对吸附性能的影响。实验结果表明,镁铝型水滑石在25℃时对溴离子的静态饱和吸附量为25.65 mg/g,其吸附等温线可以用Langmuir吸附等温式描述。

Mg-Al hydrotalcite compounds were synthesized using the co-precipitation method and characterized by infrared spectra （IR）. The effects of reaction time, temperature and dosage for bromide anion on the adsorption have been investigated. The result shows that the Mg-Al Hydrotalcite has an excellent performance in adsorbing bromide anion, the adsorption capacity is 25.65 mg/g at 25 ℃ and in accordance with the Langmuir isotherm.