4种脂肪多胺修饰硅胶对铅离子的吸附

贺松, 赵春贵, 杨素萍. 4种脂肪多胺修饰硅胶对铅离子的吸附[J]. 环境工程学报, 2014, 8(8): 3208-3216.
引用本文: 贺松, 赵春贵, 杨素萍. 4种脂肪多胺修饰硅胶对铅离子的吸附[J]. 环境工程学报, 2014, 8(8): 3208-3216.
He Song, Zhao Chungui, Yang Suping. Four aliphatic amines modified silica gels for adsorption of Pb2+[J]. Chinese Journal of Environmental Engineering, 2014, 8(8): 3208-3216.
Citation: He Song, Zhao Chungui, Yang Suping. Four aliphatic amines modified silica gels for adsorption of Pb2+[J]. Chinese Journal of Environmental Engineering, 2014, 8(8): 3208-3216.

4种脂肪多胺修饰硅胶对铅离子的吸附

  • 基金项目:

    国家自然科学基金资助项目(31070054

    31270106)

    福建省自然科学基金资助项目(2010J01209

    2012J01136)

  • 中图分类号: X703.5

Four aliphatic amines modified silica gels for adsorption of Pb2+

  • Fund Project:
  • 摘要: 为了合成高效铅离子吸附剂,了解其对铅离子的吸附规律。采用(3-氯丙基)三甲氧基硅烷(CPTS)架桥法,以硅胶 (SG)为载体,乙二胺 (EDA)、二乙烯三胺 (DETA)、三乙烯四胺 (TETA)和四乙烯五胺 (TEPA)为表面修饰剂,合成了4种胺化硅胶,测定了它们的红外光谱、热重等性质以及对Cu2+、Zn2+和Pb2+的吸附能力。结果表明,4种胺化硅胶对Pb2+的吸附量均大于Cu2+和Zn2+的吸附量,其中DETA修饰硅胶对Pb2+的吸附量较高。4种胺化硅胶对Pb2+的吸附过程较好地符合拟二级动力学模型以及Langmuir和Scatchart等温吸附热力学模型,其对Pb2+吸附的速率常数、饱和吸附量以及吸附位点数由大到小的顺序一致,均为SG-DETA > SG-TEPA > SG-EDA > SG-TETA。4种胺化硅胶对Pb2+的吸附速率和吸附量呈现“奇数胺”增强效应,亲和常数则依次减小。阐明了脂肪多胺修饰硅胶对Pb2+的吸附规律,并进一步讨论了Scatchart和Langmuir热力学模型的统一性。
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出版历程
  • 收稿日期:  2013-09-14
  • 刊出日期:  2014-07-31
贺松, 赵春贵, 杨素萍. 4种脂肪多胺修饰硅胶对铅离子的吸附[J]. 环境工程学报, 2014, 8(8): 3208-3216.
引用本文: 贺松, 赵春贵, 杨素萍. 4种脂肪多胺修饰硅胶对铅离子的吸附[J]. 环境工程学报, 2014, 8(8): 3208-3216.
He Song, Zhao Chungui, Yang Suping. Four aliphatic amines modified silica gels for adsorption of Pb2+[J]. Chinese Journal of Environmental Engineering, 2014, 8(8): 3208-3216.
Citation: He Song, Zhao Chungui, Yang Suping. Four aliphatic amines modified silica gels for adsorption of Pb2+[J]. Chinese Journal of Environmental Engineering, 2014, 8(8): 3208-3216.

4种脂肪多胺修饰硅胶对铅离子的吸附

  • 1. 华侨大学化工学院, 厦门 361021
基金项目:

国家自然科学基金资助项目(31070054

31270106)

福建省自然科学基金资助项目(2010J01209

2012J01136)

摘要: 为了合成高效铅离子吸附剂,了解其对铅离子的吸附规律。采用(3-氯丙基)三甲氧基硅烷(CPTS)架桥法,以硅胶 (SG)为载体,乙二胺 (EDA)、二乙烯三胺 (DETA)、三乙烯四胺 (TETA)和四乙烯五胺 (TEPA)为表面修饰剂,合成了4种胺化硅胶,测定了它们的红外光谱、热重等性质以及对Cu2+、Zn2+和Pb2+的吸附能力。结果表明,4种胺化硅胶对Pb2+的吸附量均大于Cu2+和Zn2+的吸附量,其中DETA修饰硅胶对Pb2+的吸附量较高。4种胺化硅胶对Pb2+的吸附过程较好地符合拟二级动力学模型以及Langmuir和Scatchart等温吸附热力学模型,其对Pb2+吸附的速率常数、饱和吸附量以及吸附位点数由大到小的顺序一致,均为SG-DETA > SG-TEPA > SG-EDA > SG-TETA。4种胺化硅胶对Pb2+的吸附速率和吸附量呈现“奇数胺”增强效应,亲和常数则依次减小。阐明了脂肪多胺修饰硅胶对Pb2+的吸附规律,并进一步讨论了Scatchart和Langmuir热力学模型的统一性。

English Abstract

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