Ke Kong, Jun Liang, Fangling Cui, Ying Zhang, Daqiang Yuan, Ruihu Wang
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Novel hierarchical ionic polymers for removal of perfluorooctane sulfonate and dichromate
The development of porous adsorbents for removal of concomitant perfluorooctane sulfonate (PFOS) and dichromate pollutants is pivotal and challenging in wastewater remediation. Herein, we presented a leaf-inspired artificial cleaning system based on an ionic polymer (ImIP-6) with high local density of imidazolium moieties and charge-balanced chloride for efficiently simultaneous removal of PFOS and dichromate. ImIP-6 exhibits fast kinetics and ultrahigh uptake capacities with maximum adsorption values of 2606 mg g−1 for PFOS and 247 mg g−1 for Cr(VI), which are far superior to many porous sorbents. The mechanism studies have evidenced that ImIP-6 possesses two types of domains for PFOS and dichromate adsorption, in which the imidazolium-based cationic surface induces PFOS enrichment and subsequent formation of micelles on the outer surfaces without significantly interfering the adsorption of dichromate in the interior pores. This work provides one new approach based on biomimetic systems with hierarchical adsorption domains for wastewater remediation.
期刊介绍：
The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.
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