Department of Materials Science and Engineering, Hongik University, 2639-Sejong- Ro, Jochiwon-eup, Sejong-city, 30016, South Korea.
Department of Materials Science and Engineering, Hongik University, 2639-Sejong- Ro, Jochiwon-eup, Sejong-city, 30016, South Korea; School of Mechanical Engineering and Transportation, Mongolian University of Science and Technology, Ulaanbaatar, Mongolia.
Environ Pollut. 2020 Dec;267:115498. doi: 10.1016/j.envpol.2020.115498. Epub 2020 Aug 29.
Industrial dye effluents, which are a major wastage component that enter the natural environment, pose a significant health risk to human and aquatic life. Therefore, the effective removal of dye effluents is a major concern. Against this backdrop, in this study, a low-cost, earth-abundant, and ecofriendly ɤ-FeO-PPy nanocomposite was prepared employing the conventional hydrothermal method. The morphology, functional groups, and elemental composition of ɤ-FeO-PPy were characterized by XRD, SEM, XPS, and FTIR studies. Under optimized conditions, the prepared novel ɤ-FeO-PPy nanocomposite showed a high methylene blue (MB) adsorption capacity of 464 mg/g, which is significantly higher than that of existing adsorbents such as CNTs and polymer-modified CNTs. The adsorption parameters such as pH, adsorbent dosage, and ionic strength were optimized to enhance the MB adsorption capacity. The adsorption results revealed that MB is adsorbed onto the adsorbent surface via electrostatic interactions, hydrogen bonding, and chemical binding interactions. In terms of practical application, the adsorbent's adsorption-desorption ability in conjunction with magnetic separation was investigated; the prepared ɤ-FeO-PPy nanocomposite exhibited excellent adsorption and desorption efficiencies over more than seven adsorption-desorption cycles.
工业染料废水是进入自然环境的主要浪费成分之一，对人类和水生生物的健康构成重大威胁。因此，有效去除染料废水是一个主要关注点。在此背景下，本研究采用传统水热法制备了一种低成本、丰富的地球元素、环保的ɤ-FeO-PPy 纳米复合材料。通过 XRD、SEM、XPS 和 FTIR 研究对 ɤ-FeO-PPy 的形貌、官能团和元素组成进行了表征。在优化条件下，所制备的新型ɤ-FeO-PPy 纳米复合材料对亚甲基蓝（MB）的吸附容量高达 464mg/g，明显高于 CNTs 和聚合物修饰的 CNTs 等现有吸附剂。优化了 pH、吸附剂用量和离子强度等吸附参数，以提高 MB 的吸附容量。吸附结果表明，MB 通过静电相互作用、氢键和化学结合相互作用吸附到吸附剂表面。在实际应用方面，研究了吸附剂与磁分离相结合的吸附-解吸能力；所制备的ɤ-FeO-PPy 纳米复合材料在超过七个吸附-解吸循环中表现出优异的吸附和解吸效率。
