Synthesis of Electrically Conductive Montmorillonite-Polypyrrole Composite Nanoparticles to Enhance the Antifouling, Cleaning Efficiency and Arsenic Separation in PLA Membranes

IF 4.7 3区工程技术 Q2 ENGINEERING, ENVIRONMENTAL

Journal of Polymers and the Environment Pub Date : 2025-01-18 DOI:10.1007/s10924-025-03489-5

Elham Shokri, Elham Effati, Kosar Behmaram

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Abstract

This study focuses on the synthesis of electrically conductive montmorillonite-polypyrrole (Mt-PPy) composite nanoparticles (NPs) to enhance antifouling properties and arsenate (As (V)) separation. Fourier transforms infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM) confirmed the formation of Mt-PPy composite NPs. Results from porosity, mechanical property, and water uptake analysis of the fabricated membranes incorporating Mt-PPy demonstrated superior performance for the PLA-(Mt-PPy-0.5) membrane. The positive charge of PPy and Cl ions in its structure enhanced the As (V) removal efficiency, mainly in PLA-(Mt-PPy-0.5) membrane (~ 100%), where the concentration of Mt-PPy was higher and well-dispersed. An electro-conductive PLA-(Mt-PPy) membrane was employed as a cathode, and the impact of Mt-PPy concentration on the cleaning efficacy of the membranes examined. The findings highlight the potential of conductive membrane in improving antifouling performance. By applying an electric current, PLA-(Mt-PPy-0.5) membrane achieved highest flux recovery ratio (FRR) of approximately 91.3%, due to the stronger repulsive force between the membrane and humic acid (HA). This process also increased As (V) desorption, enabling effective use of the membrane in multiple As (V) adsorption-desorption cycles.

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导电蒙脱石-聚吡咯复合纳米颗粒的合成提高PLA膜的防污、清洁效率和砷分离

本文主要研究了导电蒙脱石-聚吡咯（Mt-PPy）复合纳米颗粒（NPs）的合成，以提高其防污性能和砷酸盐（As (V)）的分离性能。傅里叶变换红外光谱（FTIR）、热重分析（TGA）、x射线衍射（XRD）和扫描电镜（SEM）证实了Mt-PPy复合NPs的形成。对含有Mt-PPy的制备膜的孔隙率、力学性能和吸水性分析结果表明，PLA-(Mt-PPy-0.5)膜具有优越的性能。其结构中带正电荷的PPy和Cl离子提高了As (V)的去除效率，主要是在PLA-(Mt-PPy-0.5)膜中（~ 100%），其中Mt-PPy浓度较高且分散良好。采用导电聚乳酸-(Mt-PPy)膜作为阴极，考察了Mt-PPy浓度对膜清洁效果的影响。这些发现突出了导电膜在提高防污性能方面的潜力。通过施加电流，PLA-(mt - py -0.5)膜获得了最高的通量回收率（FRR），约为91.3%，这是由于膜与腐植酸（HA）之间的排斥力更强。该工艺还增加了As (V)的脱附，使膜在多个As (V)吸附-脱附循环中有效利用。

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来源期刊

Journal of Polymers and the Environment 工程技术-高分子科学

CiteScore

9.50

自引率

7.50%

发文量

297

审稿时长

9 months

期刊介绍： The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.