Sustainability Solutions Research Lab, Bio-Environmental and Chemical Engineering Research and Development Center, Faculty of Engineering, University of Pannonia, Veszprém, Hungary; Chemistry Branch, Applied Sciences Department, University of Technology, Baghdad, Iraq.
Sustainability Solutions Research Lab, Bio-Environmental and Chemical Engineering Research and Development Center, Faculty of Engineering, University of Pannonia, Veszprém, Hungary.
Environ Pollut. 2022 Aug 1;306:119372. doi: 10.1016/j.envpol.2022.119372. Epub 2022 May 6.
Multiwalled carbon nanotubes (MWCNTs) were oxidized using a mixture of HSO and HNO, and the oxidized MWCNTS were decorated with magnetite (FeO). Finally, poly-N-isopropyl acrylamide-co-butyl acrylate (P-NIPAM) was added to obtain P-NIPAM/Fe/MWCNT nanocomposites. The nanosorbents were characterized by various techniques, including X-ray diffraction, transmission electron microscopy, scanning electron microscopy, thermogravimetric analysis, and Brunauer-Emmett-Teller analysis. The P-NIPAM/Fe/MWCNT nanocomposites exhibited increased surface hydrophobicity. Owing to their higher adsorption capacity, their kerosene removal efficiency was 95%; by contrast, the as-prepared, oxidized, and magnetite-decorated MWCNTs had removal efficiencies of 45%, 55%, and 68%, respectively. The P-NIPAM/Fe/MWCNT nanocomposites exhibited a sorbent capacity of 8.1 g/g for kerosene removal from water. The highest kerosene removal efficiency from water was obtained at a process time of 45 min, sorbent dose of 0.005 g, solution temperature of 40 °C, and pH 3.5. The P-NIPAM/Fe/MWCNTs showed excellent stability after four cycles of kerosene removal from water followed by regeneration. The reason may be the increase in the positive charge of the polymer at pH 3.5 and the increased adsorption affinity of the adsorbent toward the kerosene contaminant. The pseudo second-order model was found to be the most suitable model for studying the kinetics of the adsorption reaction.
多壁碳纳米管（MWCNTs）使用 HSO 和 HNO 的混合物进行氧化，氧化后的 MWCNTs 用磁铁矿（FeO）进行修饰。最后，添加聚 N-异丙基丙烯酰胺-co-丁基丙烯酰胺（P-NIPAM）以获得 P-NIPAM/Fe/MWCNT 纳米复合材料。纳米吸附剂通过各种技术进行了表征，包括 X 射线衍射、透射电子显微镜、扫描电子显微镜、热重分析和 Brunauer-Emmett-Teller 分析。P-NIPAM/Fe/MWCNT 纳米复合材料表现出增加的表面疏水性。由于其更高的吸附容量，它们的煤油去除效率为 95%；相比之下，制备的、氧化的和磁铁矿修饰的 MWCNTs 的去除效率分别为 45%、55%和 68%。P-NIPAM/Fe/MWCNT 纳米复合材料对水中煤油的吸附容量为 8.1 g/g。在 45 分钟的处理时间、0.005 g 的吸附剂剂量、40°C 的溶液温度和 pH 值为 3.5 的条件下，可获得最高的煤油去除效率。P-NIPAM/Fe/MWCNTs 在经过四次从水中去除煤油和再生后表现出优异的稳定性。原因可能是聚合物在 pH 值为 3.5 时带正电荷增加，以及吸附剂对煤油污染物的吸附亲和力增加。发现伪二阶模型最适合研究吸附反应动力学。
