Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, First Ring Road, 4th Section No.16, Chengdu, Sichuan 610041, China.
School of Biomedical Sciences and Technology, Chengdu Medical College, Xindu Road No.783, Chengdu, Sichuan 610500, China.
Int J Biol Macromol. 2023 Jun 30;241:124620. doi: 10.1016/j.ijbiomac.2023.124620. Epub 2023 Apr 28.
Water pollution has become one of the most concerned environmental issues on the worldwide scale. Due to the harmfulness of the heavy metal ions and microorganisms in wastewater, novel filtration membranes for water treatment are expected to simultaneously clear these pollutants. Herein, the electro-spun polyacrylonitrile (PAN) based magnetic ion-imprinted membrane (MIIM) were fabricated to achieve both selective removal of Pb(II) ions and excellent antibacterial efficiency. The competitive removal experiments showed that the MIIM displayed efficiently selective removal of Pb(II) (45.4 mg·g). Pseudo-second-order mode and Langmuir isotherm equation is well matched with the equilibrium adsorption. The MIIM showed sustained removal performance (~79.0 %) against Pb(II) ions after 7 adsorption-desorption cycles with negligible Fe ions loss of 7.3 %. Moreover, the MIIM exhibited excellent antibacterial properties that >90 % of E. coli and S. aureus were killed by the MIIM. In conclusion, the MIIM provides a novel technological platform for integration of multi-function with selective metal ions removal, excellent cycling reusability, and enhanced antibacterial fouling property, which can be potentially utilized as a promising adsorbent in actual treatment of polluted water.
水污染已经成为全球范围内最受关注的环境问题之一。由于废水中重金属离子和微生物的危害性，人们期望新型过滤膜能够同时清除这些污染物。本文制备了基于静电纺丝的聚丙烯腈（PAN）基磁性离子印迹膜（MIIM），以实现对 Pb(II)离子的选择性去除和优异的抗菌效率。竞争去除实验表明，MIIM 对 Pb(II)（45.4mg·g）表现出高效的选择性去除。准二级动力学模型和 Langmuir 等温线方程很好地拟合了平衡吸附。MIIM 在 7 次吸附-解吸循环后对 Pb(II)离子仍保持持续的去除性能（~79.0%），Fe 离子的损失可忽略不计（7.3%）。此外，MIIM 表现出优异的抗菌性能，MIIM 可杀死超过 90%的大肠杆菌和金黄色葡萄球菌。总之，MIIM 为多功能集成提供了一个新的技术平台，可选择性地去除金属离子、具有优异的循环再利用性和增强的抗菌抗污染性能，有望在实际的污水治理中作为一种有前景的吸附剂得到应用。
