标题: Green synthesis of poly(pyrrole methane)-based adsorbent for efficient removal of chromium(VI) from aqueous solution
作者: Yajun Ji, Feiya Xu, Panli Zhang, Yuanyi Xu, Gaili Zhang
来源出版物: Journal of Cleaner Production
DOI: 10.1016/j.jclepro.2021.126197
出版年: 2021
文献类型: Article
语种: 英文
摘要: It has attracted more and more attention to deal with chromium(VI) (Cr(VI)) pollution in wastewater due to its potential harm to human health. In this study, poly(pyrrole methane) (PPm), a potential material for Cr(VI) adsorption, was greenly synthesized for the removal of Cr(VI) from aqueous solution. Further, the Fe3O4 nanoparticles were loaded on the surface of PPm to enhance the separation property. The adsorption of Cr(VI) was favorable at a lower pH value, and it conformed to Langmuir and pseudo-second order model. When the solution pH was 2, the dosage of PPm was 0.5 g·L-1, the reaction temperature was 45 oC, and the reaction time was 24 h, the maximum adsorption capacity of PPm reached 922.49 mg·g-1, which was higher than most of the reported adsorbents (40-560 mg·g-1). The removal rate reached about 100% even in the presence of competitive ions. The as-prepared adsorbent can be reused for 5 times and the removal rate still exceeded 70%. The adsorption mechanisms of Cr(VI) onto PPm included electrostatic interactions, ion exchange, reduction of Cr(VI) to Cr(III), and immobilization of Cr(III). Although the adsorption capacity of PPm/Fe3O4 was lower than that of pure PPm (549.75 mg·g-1), it can be facilely separated from aqueous solution after adsorption. Notably, this study also provided a facile strategy to prepare adsorbent with active functional groups for efficient removal of Cr(VI) from aqueous solution.
关键词: Poly(pyrrole methane); Fe3O4; Chromium(VI); Adsorption; Reduction
影响因子: 7.246
论文连接: https://doi.org/10.1016/j.jclepro.2021.126197