Adsorber Charge Dominates over Hydrophobic or Fluorophilic Functionalization in Influencing Adsorption of PFCA onto Polystyrene Resins

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Interfaces Pub Date : 2024-06-04 DOI:10.1002/admi.202400199

Florian Junge, Philipp Wittwer, Thomas Sommerfeld, Lennart Gehrenkemper, Christian Zoister, Philip Nickl, Matthias Koch, Björn Meermann, Rainer Haag

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Abstract

A systematic series of industrial-relevant polystyrene-based anion exchange resins that are functionalized with hydro- or fluorocarbon chains are compared regarding their adsorption behavior toward perfluorocarboxylic acids (PFCA) in respect to their charge, chain length, and type of chain. The results clearly show the dominance of electrostatic interactions in the adsorption process as uncharged adsorber materials showed no adsorption at all. In contrast, the charged adsorber materials showed in general a PFCA removal of 80% to 30% over the experiment depending on effluent fraction. Unexpectedly, for perfluorobutanoic acid (PFBA) the highest removal rate is found with consistently >90%. Despite observing significant benefits in the adsorption of PFCA for fluoroalkylated adsorbers in comparison to their non-fluorinated counterparts, this effect of fluoroalkylation is comparatively small and can not be clearly attributed to fluorophilic interactions between the fluoroalkyl chains. These findings help clarifying that the introduction of fluorocarbon moieties in adsorber materials is not necessary in order to remove fluorocarbon molecules from the environment.

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在影响聚苯乙烯树脂对全氟辛烷磺酸的吸附方面，吸附剂电荷比疏水或亲氟官能度更重要

本研究比较了一系列与工业相关的聚苯乙烯基阴离子交换树脂，这些树脂具有功能化的碳氢链或碳氟化合物链，它们对全氟羧酸（PFCA）的吸附行为与电荷、链长和链类型有关。结果清楚地表明，静电作用在吸附过程中占主导地位，因为不带电的吸附剂材料根本没有吸附作用。相反，带电吸附剂材料在实验中对全氟甲烷的去除率一般在 80% 到 30% 之间，具体取决于流出物的馏分。出乎意料的是，全氟丁酸（PFBA）的去除率最高，一直达到 90%。尽管与未氟化的吸附剂相比，氟烷基化吸附剂对全氟辛酸的吸附效果显著，但氟烷基化的影响相对较小，不能明确归因于氟烷基链之间的亲氟相互作用。这些发现有助于说明，在吸附剂材料中引入碳氟化合物分子并不是从环境中去除碳氟化合物分子的必要条件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Materials Interfaces CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.40

自引率

5.60%

发文量

1174

审稿时长

1.3 months

期刊介绍： Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018. The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface. Advanced Materials Interfaces covers all topics in interface-related research: Oil / water separation, Applications of nanostructured materials, 2D materials and heterostructures, Surfaces and interfaces in organic electronic devices, Catalysis and membranes, Self-assembly and nanopatterned surfaces, Composite and coating materials, Biointerfaces for technical and medical applications. Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.