| 膨润土对Pb~(2+)的吸附及铝的影响研究 |
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| 引用本文： | 张洁,王强,张洁婷,王淑慧,褚斌,刘乐乐,叶长青.膨润土对Pb~(2+)的吸附及铝的影响研究[J].当代化工,2014(12):2486-2489. |
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| 作者姓名： | 张洁 王强 张洁婷 王淑慧 褚斌 刘乐乐 叶长青 |
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| 作者单位： | 南通大学 |
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| 基金项目： | 江苏省大学生创新训练计划(2014204);南通大学人才引进项目(12R026,12R027,12Z022);江苏省六大人才高峰计划(JNHB012) |
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| 摘 要： | 研究膨润土对水溶液中铅的吸附特性以及铝对铅吸附的影响。通过各组吸附实验,建立膨润土对水溶液中铅离子的吸附最佳条件,天然膨润土对铅的吸附平衡时间约为60 min,其吸附符合一级动力学方程;铅吸附最适p H=9;天然膨润土对水溶液中铅离子的吸附规律符合Freundlich等温方程和Langmuir等温方程,呈显著相关性;加入少量铝离子时,吸附除铅能力增强,但继续增加铝浓度,去除能力降低,该现象主要通过铝盐水解所致的p H变化起调节作用,电中和作用不明显。
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| 关 键 词： | 膨润土 吸附 Pb2+ 吸附等温线 铝 |
Study on Adsorption of Pb2＋on Bentonite and Effects of Aluminum Ions |
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| ZHANG Jie;WANG Qiang;ZHANG Jie-ting;WANG Shu-hui;CHU Bin;LIU Le-le;YE Chang-qing.Study on Adsorption of Pb2＋on Bentonite and Effects of Aluminum Ions[J].Contemporary Chemical Industry,2014(12):2486-2489. |
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| Authors: | ZHANG Jie;WANG Qiang;ZHANG Jie-ting;WANG Shu-hui;CHU Bin;LIU Le-le;YE Chang-qing |
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| Affiliation: | ZHANG Jie;WANG Qiang;ZHANG Jie-ting;WANG Shu-hui;CHU Bin;LIU Le-le;YE Chang-qing;Nantong University; |
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| Abstract: | The adsorption characteristics of lead on natural bentonite and effect of aluminum ions were studied. The results show that the adsorption completes in 60 min, conforms to first-order reaction, optimum pH is 9;the adsorption of lead ions on bentonite conforms to both Langmuir isotherm equation and Freundlich isotherm equation with significant correlation. When adding a small amount of aluminum ions in the reaction system, the ability of lead removing enhances, and then decreases with further increase of aluminum ion content, which is resulted from the adjusting of pH, but is not caused by the charge neutralization. |
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| Keywords: | Bentonite Adsorption Absorption isotherm Aluminum |
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