Rigid polyelectrolyte multilayer membrane with ultrahigh permeance and excellent dye/salt separation performance

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering Pub Date : 2025-03-13 DOI:10.1016/j.jece.2025.116164

Na Zhang , Fanglu Fu , Wen Bo , Hussein Baqiah , Li Zhao , Wenbo Lu , Yadi Cai , Jiahui Tian , Tingting Yan , Saisai Li , Shuyun Zheng , Qiang Li

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引用次数: 0

Abstract

Two kinds of polyelectrolyte assembled membranes have been prepared using a rigid sulfonated polysulfone (SPSU) and a flexible poly(sodium 4-styrenesulfonate) (PSS) as anionic polyelectrolytes, respectively, with a polyethyleneimine (PEI) as a common cationic polyelectrolyte. The effects of molecular backbone’s rigidity and flexibility on the characteristics and performances of SPSU/PEI and PSS/PEI membranes have been investigated in detail. The SPSU/PEI membrane with two bilayers (SPSU/PEI-2.0) has a thinner and looser separation layer due to expanded molecular conformation and bulky benzene rings of the SPSU. In addition, the SPSU/PEI-2.0 membrane exhibits an ultrahigh pure water permeance up to 70.0 L m⁻² h⁻¹ bar⁻¹. The optimized separation performance for Congo red (CR)/NaCl and CR/Na₂SO₄ displays the same high CR rejection of 99.6 %, low NaCl rejection of 1.2 % and Na₂SO₄ rejection of 7.9 %. The SPSU/PEI-2.0 membrane also shows excellent acid-resistance stability, thermal stability and long-term operation stability. This research presents that choosing polyelectrolytes with appropriate molecular structures can be attractive when designing polyelectrolyte multilayer membrane to separate dye and salt.

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来源期刊

Journal of Environmental Chemical Engineering Environmental Science-Pollution

CiteScore

11.40

自引率

6.50%

发文量

2017

审稿时长

27 days

期刊介绍： The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.