• 关键词：碳纳米管  复合吸附剂  自组装  吸附性能  菲

• 基金项目：国家自然科学基金（No.21207125）；浙江省科技计划项目（No.2012C31027）

• 徐立恒
• 中国计量学院环境工程系, 杭州 310018

• 张明
• 中国计量学院环境工程系, 杭州 310018

• 陈锋
• 中国计量学院环境工程系, 杭州 310018

• 摘要：为了解决碳纳米管（CNTs）在吸附水中污染物时易聚集、难分离的问题，本文采用静电自组装技术将碳纳米管固定化在具有微米级粒径的碳酸钙颗粒表面，设计制备了壳-核结构的CNTs基复合吸附剂.实验考查了不同碳纳米管分散体系对复合吸附剂制备的影响，并采用Zeta电位、拉曼光谱、扫描电镜等手段对复合吸附剂的制备过程和结构进行表征，探讨了制备的碳纳米管基复合吸附剂对菲的吸附性能.结果发现，复合吸附剂对菲的吸附能力随CNTs载量的增加而增大，CNTs标化的吸附系数则随CNTs载量的增加而下降，碳纳米管是复合吸附剂的主要吸附位点.

• Abstract：In order to overcome the difficulties of dispersion and separation in water of carbon nanotubes (CNTs) as adsorbents, CNTs-based composite adsorbents were fabricated in this study by immobilizing CNTs onto CaCO₃ templates with self-assembly technique.Zeta potential,Raman Spectroscopy and Scanning Electronic Microscopy were employed to characterize the structure of the composite adsorbents. It was found that carbon nanotubes were evenly stacked on the surface of CaCO₃ particles forming shells. The adsorption capacities of the CNTs-based composite adsorbents were also evaluated. Results showed that CNTs were the dominant adsorption sites of CNTs-based composite adsorbents, and the adsorption capacity of composite adsorbents increased as the increase of loading amount of CNTs, while the CNTs standard adsorption coefficient (K_CNT) decreased.

• Key words：carbon nanotubes (CNTs)  composite adsorbent  self assembly  adsorption capacity  phenanthrene

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