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羧基化多壁碳纳米管(c-MWCNT)/Fe3O4磁性复合材料(c-MWCNTMCs)通过六水合三氯化铁,乙酸钠,乙二醇,二乙二醇和c-MWCNT混合,然后超声处理,在200℃下加热10 h而制得。结果表明,c-MWCNTMCs在去离子水中表现出良好的分散性、酸碱稳定性和磁性,可以作为去除铜(Ⅱ)的吸附剂。c-MWCNTMCs易被磁铁从水中分离,并对铜(Ⅱ)具有较高的吸附容量。c-MWCNTMCs对铜(Ⅱ)的吸附较快,并成拟二级吸附动力模型。c-MWCNTMCs和Cu(Ⅱ)之间的吸附力是一种化学键,在pH<2的条件下吸附剂可以再生。具有磁性的Fe3O4只对快速分离有利,而对吸附几乎没有影响。基于这种新型复合材料从水中去除的铜(Ⅱ)的检测限可达1.29μg/L。
Carboxylated multiwalled carbon nanotubes (c-MWCNTs) / Fe3O4 magnetic composites (c-MWCNTMCs) were mixed with ferric chloride hexahydrate, sodium acetate, ethylene glycol, diethylene glycol and c-MWCNT and then sonicated, Heated at 200 ℃ for 10 h and prepared. The results showed that c-MWCNTMCs exhibited good dispersibility, acid-base stability and magnetic properties in deionized water, which could be used as adsorbents for copper (Ⅱ) removal. c-MWCNTMCs are easily separated from the magnet by the magnet and have a high adsorption capacity for copper (II). The adsorption of copper (Ⅱ) by c-MWCNTMCs was faster and the kinetic model of secondary adsorption was proposed. The adsorption force between c-MWCNTMCs and Cu (II) is a chemical bond, and the adsorbent can be regenerated at pH <2. Fe3O4 with magnetism is only good for rapid separation, but has almost no effect on adsorption. The detection limit of copper (Ⅱ) removed from water based on this novel composite is up to 1.29 μg / L.