凹凸棒土改性方法及应用于水处理的综述

The Modification of Attapulgite and a Review of Its Application in Water Treatment

李玲娟1　施　豪2　（1.上海环境保护有限公司，上海 200233；2.博世华域转向系统有限公司，上海 201821）

Li Lingjuan1　Shi Hao2　(1.Shanghai Environmental Protection Co., Ltd., Shanghai 200233;2.Bosch Huayu Steering System Co., Ltd., Shanghai 201821)

摘要　凹凸棒土可作为水处理吸附材料，具有价格低廉、环境效益好等特点，对其进行适当改性处理可提高吸附力，满足应用需求。比较了酸化法、热活化法、有机改性法、负载纳米铁等4种凹凸棒土改性方式的优缺点。分析了凹凸棒土在水处理过程中的具体应用。

关键词：凹凸棒土　水处理　生态环境　改性处理(www.xing528.com)

Abstract　Attapulgite can be employed as an adsorbent for water treatment, and is characterised by its inexpensiveness and good environmental effectiveness.The adsorptive capacity of attapulgite could be improved through appropriate modification to satisfy the demand for its application.The merits and demerits of four processes of the modification were compared including the methods of acidification, thermal activation, organic modification, and loading nano-iron.Practical application of attapulgite in water treatment process was analysed as well.

Key words：Attapulgite　Water treatment Ecological environment　Modification processing

第一作者李玲娟，女，1990年生，2012年毕业于西华大学水利水电工程专业，硕士。

凹凸棒土黏土高、表面积大，表面含有大量的硅烷醇基团及交换阳离子，可作为水处理吸附材料，在实际应用过程中具有吸附性好、价格低廉等优点。但天然的凹凸棒土纯度较低，含有大量杂质，其吸附性能偏低，选择性差。因此，应采取合理的方式对凹凸棒土进行改性，提升其性能，以满足应用需求。