汤睿¹,张寒冰^2,3,施华珍¹,刘坤²,朱颖²,童张法^1,3

• 1:广西大学化学化工学院 资源化工应用新技术广西高校重点实验室，广西 南宁 530004
• 2:广西大学 资源环境与材料学院，广西 南宁 530004
• 3:广西碳酸钙产业化工程院，广西 南宁 530004

摘要(Abstract)：

为提高膨润土的固液分离能力及其对难降解污染物的吸附效果，采用十六烷基三甲基溴化铵（hexadecyl trimethyl ammonium bromide，CTAB）对磁性膨润土（magnetic bentonite，MB）进行有机改性，制得CTAB改性磁性膨润土（MB modified by CTAB，CTAB/MB），考察CTAB/MB吸附刚果红（Congo Red，CR）和酸性大红（Acidic Red，AR）的性能，并进行吸附机理研究。研究结果表明，CTAB/MB为多级孔结构材料，具有良好的磁分离和磁稳定性能；CTAB/MB对50 mg·L^-1 CR和AR的吸附平衡时间分别为30和90 min，而MB对CR和AR的吸附平衡时间则分别为5和3 h；在pH 4~11时，CTAB/MB对CR和AR的去除率均保持在85%以上；5次循环利用后，CTAB/MB对CR和AR的吸附保持在90%和92%以上；CTAB/MB对染料的吸附符合Langmuir模型和准二级吸附动力学模型；CTAB/MB吸附CR和AR的机理主要包括离子交换、静电吸引和表面吸附。总之，CTAB/MB是一种具有良好应用前景的染料废水吸附材料。

关键词(KeyWords)： CTAB;MB;吸附;刚果红;酸性大红

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（21576055，21766001）；广西石化资源加工及过程强化技术重点实验室主任课题（2018Z004）。

作者(Author): 汤睿¹,张寒冰^2,3,施华珍¹,刘坤²,朱颖²,童张法^1,3

DOI: 10.3969/j.issn.1003-9015.2019.03.031

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