Department of Chemistry, The Gandhigram Rural Institute-Deemed to be University, Gandhigram, 624032, Dindigul, Tamil Nadu, India; Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.
Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.
J Hazard Mater. 2021 Apr 15;408:124892. doi: 10.1016/j.jhazmat.2020.124892. Epub 2020 Dec 18.
Contaminated waters with high contents of toxic anions are detrimental to the human health and wildlife. Thus, the quality of drinking water should be carefully monitored. Adsorption technique has been determined to be a reasonable strategy out of several methods used to remove toxic anions from water. Novel MgFeO-reinforced polypyrrole (Ppy@x%MgFeO) (x = 1%, 2%, and 5% of MgFeO) hybrids were synthesized from a pyrrole monomer and MgFeO using a simple chemical oxidation method. The fabricated hybrids were studied for their capability to remove PO, NO, and Cr(VI) from aqueous solutions. The results showed that PO, NO, and Cr(VI) removal was highly pH-dependent. The adsorption isotherms of hybrids were fitted well by the Langmuir model, with the maximum adsorption efficiency of 116.90, 76.14, and 138.60 mg/g for PO, NO, and Cr(VI), respectively. In addition, the above-mentioned toxic anions could be efficiently desorbed from spent Ppy@x%MgFeO using a 0.1 M NaOH solution, and the hybrids exhibited good regenerability. The prepared materials are promising candidates for PO, NO, and Cr(VI) removal and exhibit high adsorption efficiency, rapid adsorption-desorption behavior, and appropriate recovery from the aqueous medium under external magnetic field.
受污染的水中含有高浓度的有毒阴离子，对人类健康和野生动物有害。因此，饮用水的质量应仔细监测。吸附技术已被确定为从水中去除有毒阴离子的几种方法中的一种合理策略。通过一种简单的化学氧化方法，从吡咯单体和 MgFeO 合成了新型 MgFeO 增强的聚吡咯（Ppy@x%MgFeO）（x = 1%、2%和 5%的 MgFeO）杂化物。研究了所制备的杂化物从水溶液中去除 PO、NO 和 Cr(VI) 的能力。结果表明，PO、NO 和 Cr(VI) 的去除高度依赖于 pH 值。杂化物的吸附等温线很好地符合 Langmuir 模型，对于 PO、NO 和 Cr(VI)，最大吸附效率分别为 116.90、76.14 和 138.60 mg/g。此外，上述有毒阴离子可以使用 0.1 M NaOH 溶液从用过的 Ppy@x%MgFeO 中有效地解吸，并且杂化物表现出良好的可再生性。所制备的材料是去除 PO、NO 和 Cr(VI) 的有前途的候选物，表现出高吸附效率、快速吸附-解吸行为以及在外部磁场下从水介质中适当回收的性能。
