ABSTRACT

Carbon nanotubes (CNT) have high surface area and absorption capabilities and the absorption capacity of multi-walled CNTs (MWNTs) enables paramagnetic nanotubes to be obtained by absorbing iron salts. Characterization of paramagnetic MWNTs was performed with TEM, FTIR, DSC, and VSM. Paramagnetic CNTs are used for the purification of water from heavy metals and plastic originated compounds. Most of the PVC-based materials contain phthalate acid esters (PAE) which have considerable effects on human health. In this study, MWNTs were used for removing diethyl phthalate (DEP) from methanol after their toxicity evaluation. Concentration-dependent absorption of 494, 1461, and 2950 ppm, respectively, were measured from the mixture containing 13.3, 33.3, and 66.6% DEP in 40 mg paramagnetic MWNT solution. Although it was concluded that magnetic nanotubes would exhibit significant toxic effects compared to untreated MWNTs, GC-MS results were showed a reliable absorption capacity of magnetic nanotubes for purification applications. The results demonstrated that the use of magnetic MWNTs for the extraction of PAEs is an efficient way from liquids.

摘要

碳纳米管（CNT）具有高表面积和吸收能力，多壁碳纳米管（MWNT）的吸收能力使顺磁性纳米管能够通过吸收铁盐获得。使用 TEM、FTIR、DSC 和 VSM 对顺磁性 MWNT 进行表征。顺磁性碳纳米管用于从重金属和塑料来源的化合物中净化水。大多数基于 PVC 的材料都含有对人体健康有相当大影响的邻苯二甲酸酯 (PAE)。在这项研究中，MWNT 在其毒性评估后被用于从甲醇中去除邻苯二甲酸二乙酯 (DEP)。从在 40 mg 顺磁性 MWNT 溶液中含有 13.3、33.3 和 66.6% DEP 的混合物中分别测量到 494、1461 和 2950 ppm 的浓度依赖性吸收。尽管得出的结论是磁性纳米管与未经处理的 MWNT 相比会表现出显着的毒性作用，但 GC-MS 结果显示磁性纳米管在纯化应用中具有可靠的吸收能力。结果表明，使用磁性 MWNTs 提取 PAEs 是一种从液体中提取的有效方法。