凹凸棒石的提纯及改性对其吸附性能的影响

Effect of Purification and Modification on the Adsorption Performance of Attapulgite

对凹凸棒石原土进行提纯,然后分别用盐酸、NaCl、热活化、微波进行改性处理,以亚甲基蓝吸附量作为凹凸棒石吸附性能指标。结果表明,自然沉降法提纯能使凹凸棒石的吸附能力略有提高,盐酸改性能显著提高凹凸棒石的吸附能力,NaCl、热活化、微波的改性效果依次降低,改性剂浓度、热活化温度、微波处理时间过低或过度都不利于提高凹凸棒石的吸附能力。

The purified attapulgite was modified by HCI, NaCl, heat treatment and microwave treatment. The methylene blue absorption was measured to test the adsorption performance. The results showed that the adsorption of purified attapulgite was improved slightly by natural sedimentation method; the adsorption of purified attapulgite modified by HCI was improved significantly; the adsorption of purified attapulgite modified by NaCI, heat treatment and microwave treatment reduced gradually; it was not helpful to improve the adsorption of attapulgite if modifier concentration, heat treatment temperature and microwave treatment time were too low or too high.