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介孔-枝状化合物复合体系对重金属离子吸附研究

余驰超, 张玲霞, 秦飞, 李江田, 施剑林, 严东生   

  1. 中国科学院上海硅酸盐研究所, 高性能陶瓷和超微结构国家重点实验室, 上海 200050
  • 收稿日期:2008-01-15 修回日期:2008-02-29 出版日期:2008-11-20 网络出版日期:2008-11-20

PAMAM-SBA-15 Composite in Application of Heavy Metals Ions Adsorption

YU Chi-Chao, ZHANG Ling-Xia, QIN Fei, LI Jiang-Tian, SHI Jian-Lin, YAN Dong-Sheng   

  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Insitute of Ceramics, Chinse Academy of Sciences, Shanghai 200050, China
  • Received:2008-01-15 Revised:2008-02-29 Published:2008-11-20 Online:2008-11-20

摘要: 在高含量硅羟基的SBA-15介孔孔道中用3-氨丙基三乙氧基硅烷(APTES)表面改性后, 在介孔孔道内合成了1代和2代的PAMAM (Poly(amide amine)) 枝状化合物. 利用该复合体系进行了重金属离子吸附实验, 并与只用APTES(3-氨丙基三乙氧基硅烷) 改性的SBA-15进行对比, 得到了各代样品对Pb2+和Cu2+的饱和吸附容量, 并且用TG-MS分析方法证实了PAMAM改性后的SBA-15对金属离子的络合强度要比仅用APTES改性的要强. 在模拟废水溶液吸附实验中, 该复合体系对Pb2+、Zn2+离子具有选择吸附, 处理后溶液中Pb2+、Zn2+离子浓度为0.003mg/L和0.037mg/L, 均低于国家饮用水标准.

关键词: 重金属离子吸附, PAMAM, 介孔

Abstract: Using 3-aminopropyltriethoxysilan (APTES) to modify the interior surface of SBA-15 channels, PAMAM of generation 1 and generation 2 were successfully grafted in the meso-channels of SBA-15. The PAMAM-SBA-15 hybrids are employed in the adsorption of heavy metal ions to determine their adsorptive capacity, with the APTES modified SBA-15 as a reference sample. The bonding between PAMAM hybrids and metal ions are proved to be much stronger than that of APTES modified SBA-15 by TG-MS tests. Hybrids are used in deposition solution containing several kinds of heavy metal ions, and the selective adsorption of Pb2+ and Zn2+ is found. After deposition, the concentrations of Pb2+ and Zn2+ are reduced to 0.003mg/L and 0.037mg/L, respectively, which are lower than the national standard of drinking water.

Key words: heavy metal adsorption, PAMAM, mesoporous

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