Removal of Organic Pollutants from Aqueous Systems

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Environmental Separations".

Deadline for manuscript submissions: 10 December 2025 | Viewed by 1191

Special Issue Editor

State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Interests: environmental interface chemistry; DFT calculations; synchrotron-based X-ray techniques; nanotechnology; water treatment; biogeochemistry

Special Issue Information

Dear Colleagues,

Organic pollutants in aqueous systems are an urgent threat to public health, especially for emerging pollutants like per- and polyfluoroalkyl substances (PFAS), known as “forever chemicals”.  The removal of organic pollutants from aqueous systems is pivotal to providing safe water and protecting human health. The removal technologies can be divided into three categories: physical, chemical, and biological. Adsorption, degradation, advanced oxidation process (AOP), and membrane filtration are the most used removal methods. Understanding the mechanisms and interactions is the key to comprehending the removal process and developing technologies. With a molecular-level understanding of heterogeneous reactions, the development of advanced nanomaterials provides a promising way to address organic pollutants. Thus, this Special Issue aims to present the state-of-the-art removal methods and mechanisms for organic pollutants. The overall knowledge will profoundly improve our future work to address organic pollutants in other systems.

Therefore, it is my pleasure to invite you to contribute your research article, communication, or review to this Special Issue dedicated to the removal of organic pollutants from aqueous systems.

Dr. Li Yan
Guest Editor

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Keywords

  • organic pollutants
  • PFAS
  • adsorption
  • degradation
  • mechanisms
  • modeling
  • aquatic chemistry
  • interfacial processes
  • advanced materials
  • water treatment

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Published Papers (1 paper)

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Research

13 pages, 4476 KiB  
Article
Green Preparation of ZnO Nanoparticles Using Citrus aurantium L. Extract for Dye Adsorption, Antibacterial, and Antioxidant Activities
by Xitao Yang, Liangliang Liu, Chenxiao Chen, Liping Liao and Siqi Huang
Separations 2025, 12(2), 18; https://doi.org/10.3390/separations12020018 - 21 Jan 2025
Viewed by 777
Abstract
In this study, ZnO nanoparticles (ZnO NPs) were synthesized using a green method employing fresh Citrus aurantium L. aqueous extract (CA) as a reducing agent. After preparation, the ZnO NPs were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray [...] Read more.
In this study, ZnO nanoparticles (ZnO NPs) were synthesized using a green method employing fresh Citrus aurantium L. aqueous extract (CA) as a reducing agent. After preparation, the ZnO NPs were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDAX), X-ray diffraction (XRD), and infrared spectroscopy (IR). The products displayed irregular particle shapes on a nanoscale. The adsorption ability of ZnO NPs was tested with amaranth red dye, and the result showed that it had a satisfied capacity for amaranth red. The adsorption data followed the pseudo-second-order model and the Langmuir model, which indicated the adsorption process was controlled by a chemical adsorption process and occurred homogeneously on the surface of absorbents. In addition, the prepared ZnO NPs also exhibited antibacterial abilities against Staphylococcus aureus and Escherichia coli bacteria; antioxidant activities were observed in 2-2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-di(3-ethylbenzthiazoline sulphonate) (ABTS) radicals scavenging assays and the ferric ion reducing antioxidant power (FRAP) assay, which were better than those of traditional ZnO NPs except in the FRAP assay. Based on these findings, the ZnO NPs fabricated with CA aqueous extract displayed promising abilities in the environmental remediation of dye wastewater. Full article
(This article belongs to the Special Issue Removal of Organic Pollutants from Aqueous Systems)
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