Sustainability Solutions Research Lab, University of Pannonia, Egyetem str. 10, H-8200 Veszprém, Hungary; Chemistry Branch, Applied Sciences Department, University of Technology, Baghdad, Iraq.
Sustainability Solutions Research Lab, University of Pannonia, Egyetem str. 10, H-8200 Veszprém, Hungary.
Chemosphere. 2022 Jan;287(Pt 3):132310. doi: 10.1016/j.chemosphere.2021.132310. Epub 2021 Sep 22.
In this study, a nano-adsorbent was prepared for kerosene removal from water. Multiwalled carbon nanotubes (MWCNTs) were functionalized with concentrated HNO (nitric acid). Subsequently, FeO (magnetite) nanoparticles were deposited on the MWCNTs to prepare a magnetite/MWCNTs (Fe-MWCNTs) nanocomposite. Then, polyethylene was added to the Fe-MWCNTs to fabricate a polyethylene/magnetite/MWCNTs (PE/Fe-MWCNTs) novel nanocomposite. The nano-adsorbent was characterized using BET, FTIR, Raman, XRD, TEM, and SEM. A kerosene-water model mixture was used for adsorption tests. Several parameters: adsorption time, adsorbent dose, solution pH, solution temperature, and kerosene concentration in the kerosene-water model mixture, were analyzed during adsorption experiments. After each batch experiment, kerosene concentration was determined using high-performance liquid chromatography (HPLC). Magnetic field was used to remove the adsorbent after each experiment. The kerosene adsorption capacity and removal efficiency of the PE/Fe-MWCNTs nanocomposite (3560 mg/g and 71.2 %, respectively) were higher than those of Fe-MWCNTs, ox-MWCNTs, and fresh MWCNTs (3154 mg/g and 63.1 %, 2204 mg/g and 44.0 %, and 2092 mg/g and 41.8 %, respectively). Kerosene adsorption followed a pseudo-second-order kinetic model (R = 0.999) and the Langmuir isotherm model, suggesting that adsorption was uniform and homogenous process.
在这项研究中，制备了一种用于从水中去除煤油的纳米吸附剂。多壁碳纳米管（MWCNTs）用浓 HNO（硝酸）进行功能化。随后，将 FeO（磁铁矿）纳米颗粒沉积在 MWCNTs 上，制备了磁铁矿/MWCNTs（Fe-MWCNTs）纳米复合材料。然后，将聚乙烯添加到 Fe-MWCNTs 中，制备了一种聚乙烯/磁铁矿/MWCNTs（PE/Fe-MWCNTs）新型纳米复合材料。使用 BET、FTIR、Raman、XRD、TEM 和 SEM 对纳米吸附剂进行了表征。使用煤油-水模型混合物进行了吸附测试。在吸附实验中分析了几个参数：吸附时间、吸附剂剂量、溶液 pH 值、溶液温度和煤油-水模型混合物中的煤油浓度。在每个批次实验后，使用高效液相色谱（HPLC）测定煤油浓度。在每个实验后，使用磁场去除吸附剂。PE/Fe-MWCNTs 纳米复合材料的煤油吸附容量和去除效率（分别为 3560 mg/g 和 71.2%）高于 Fe-MWCNTs、氧化 MWCNTs 和新鲜 MWCNTs（分别为 3154 mg/g 和 63.1%、2204 mg/g 和 44.0%和 2092 mg/g 和 41.8%）。煤油吸附遵循伪二阶动力学模型（R=0.999）和朗缪尔等温模型，表明吸附是均匀和均相的过程。
