Preparation of CS/PVA/POP Nanofiber Membranes and Adsorption Behavior for Hg(II) Ions

IF 1.4 4区环境科学与生态学 Q4 WATER RESOURCES

Water SA Pub Date : 2025-03-19 DOI:10.3390/w17060885

Qunhua Zhou, Yu Sun, Ziye Li, Siqin Sun, Jianshe Hu, Zhangpei Chen, Aikebaier Reheman

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引用次数: 1

Abstract

Chitosan (CS) and polyvinyl alcohol (PVA) nanofiber membranes were synthesized via electrospinning and used as supporting materials for powdered porous organic polymer (POP). These membranes were then crosslinked with glutaraldehyde, resulting in nanofiber membranes (CS/PVA/POP) as an efficient adsorbent for Hg(II) ions. Characterization using Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy showed that the membranes effectively removed up to 92.9% of mercury ions at optimal conditions, with an adsorption capacity of 116.1 mg/g. The adsorption data fit well with the Langmuir isotherm and pseudo-second-order kinetic models. The efficient uptake of mercury ions was attributed to chemisorption involving active groups (C=S, -NH2, -OH), facilitated by mechanisms such as chelation, complexation, or electron exchange. The CS/PVA/POP nanofiber membranes demonstrated significant advantages in adsorption capacity, economic viability, and recyclability, providing an effective solution to mercury pollution in water.

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CS/PVA/POP纳米纤维膜的制备及其对Hg（II）离子的吸附性能

采用静电纺丝法合成了壳聚糖（CS）和聚乙烯醇（PVA）纳米纤维膜，并将其作为粉末状多孔有机聚合物（POP）的支撑材料。然后将这些膜与戊二醛交联，得到纳米纤维膜（CS/PVA/POP）作为Hg（II）离子的有效吸附剂。傅里叶变换红外光谱、x射线衍射和扫描电镜表征表明，在最佳条件下，膜的汞离子去除率高达92.9%，吸附量为116.1 mg/g。吸附数据符合Langmuir等温线和拟二级动力学模型。汞离子的有效吸收归因于涉及活性基团（C=S, -NH2, -OH）的化学吸附，由螯合，络合或电子交换等机制促进。CS/PVA/POP纳米纤维膜在吸附能力、经济可行性和可回收性等方面具有显著优势，是解决水体汞污染的有效方法。

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来源期刊

Water SA 环境科学-水资源

CiteScore

2.80

自引率

6.70%

发文量

审稿时长

18-36 weeks

期刊介绍： WaterSA publishes refereed, original work in all branches of water science, technology and engineering. This includes water resources development; the hydrological cycle; surface hydrology; geohydrology and hydrometeorology; limnology; salinisation; treatment and management of municipal and industrial water and wastewater; treatment and disposal of sewage sludge; environmental pollution control; water quality and treatment; aquaculture in terms of its impact on the water resource; agricultural water science; etc. Water SA is the WRC’s accredited scientific journal which contains original research articles and review articles on all aspects of water science, technology, engineering and policy. Water SA has been in publication since 1975 and includes articles from both local and international authors. The journal is issued quarterly (4 editions per year).