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Separations publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Application of Chromatographic Technology in Natural Medicine Research

edited by He Ni

submission deadline 10 May 2026 | 1 articles | Viewed by 404 | Submission Open

Keywords: natural medicine; chromatographic technology; bioactive compounds; separation; identification

(This special issue belongs to the Section Analysis of Natural Products and Pharmaceuticals)

Innovative Separation Strategies for Bioactive Compounds from Plants: Methods, Mechanisms, and Applications

edited by Romero M. P. Brandão-Costa and Daniela A. Viana Marques

submission deadline 10 May 2026 | Viewed by 47 | Submission Open

Keywords: plant-derived bioactives; phytochemical separation; chromatographic techniques; green extraction methods; membrane separation; natural products purification; bioactive compounds characterization; sustainable separation technologies; phytopharmaceuticals; functional plant ingredients

(This special issue belongs to the Section Analysis of Natural Products and Pharmaceuticals)

Isolation and Identification of Biologically Active Natural Compounds

edited by

Iulia Varzaru

and

Arabela Elena Untea

submission deadline 20 May 2026 | 5 articles | Viewed by 10453 | Submission Open

Keywords: plants; by-products; bioactive compounds; isolation methods; chromatography; antioxidant activity; antimicrobial activity; bioavailable compounds; nutraceuticals

(This special issue belongs to the Section Analysis of Natural Products and Pharmaceuticals)

Novel Separation Methods for the Analysis of Active and Toxic Components in Food: Second Edition

edited by

Lorena González-Gómez

and

Sonia Morante Zarcero

submission deadline 20 May 2026 | 1 articles | Viewed by 622 | Submission Open

Keywords: food analysis; toxic compounds; bioactive compounds; micro-extractive methods; chromatography; food safety and quality; mass spectrometry; sample preparation; validated analytical methods; green methodologies

(This special issue belongs to the Section Analysis of Food and Beverages)

Recent Advances in Adsorption and Degradation Technologies of Per- and Polyfluoroalkyl Substances (PFAS)

edited by

Chinemerem Ruth Ohoro

submission deadline 20 May 2026 | Viewed by 579 | Submission Open

Keywords: PFAS; adsorption; degradation; sorption; filtration; sonolysis; reverse osmosis; ion exchange; thermal desorption; phytoremediation; remediation technologies

(This special issue belongs to the Section Environmental Separations)

Adsorbent Materials for Wastewater Treatment

edited by Che-Jung Hsu

submission deadline 20 May 2026 | Viewed by 78 | Submission Open

Keywords: adsorption; separation; purification; emerging pollutants; remediation; biochar; activated carbon; metal– organic framework; nano materials; MXene

(This special issue belongs to the Section Materials in Separation Science)

Discussion on Advanced Extraction Techniques for Active Components of Natural Products

edited by Anelise Christ-Ribeiro,

Pinto Luiz Antonio de Almeida

and

Débora Pez Jaeschke

submission deadline 20 May 2026 | Viewed by 46 | Submission Open

Keywords: advanced extraction techniques; natural products; bioactive compounds; green chemistry; valorization; biotechnological extraction; analytical characterization; sustainable processes; food applications; pharmaceutical applications

(This special issue belongs to the Section Analysis of Natural Products and Pharmaceuticals)

Natural Product Separation and Characterization of Bioactive Plant Compounds

edited by Maria Luiza Zeraik

submission deadline 30 May 2026 | Viewed by 46 | Submission Open

Keywords: natural products; bioactive compounds; plant metabolites; chromatographic separation; hyphenated techniques; sample preparation; metabolite profiling; structural characterization; phytochemistry; analytical chemistry

(This special issue belongs to the Section Analysis of Natural Products and Pharmaceuticals)

Adsorption/Degradation Methods for Water and Wastewater Treatment

edited by Milica Petrović,

Miloš Kostić

Slobodan Najdanović

Nena Velinov

and

Miljana Radović Vučić

submission deadline 31 May 2026 | 4 articles | Viewed by 4945 | Submission Open

Keywords: wastewater treatment; adsorption; electrodegradation; photodegradation; plasma degradation; (bio)sorbents; photocatalysts; plasma catalysts; pollutant removal

(This special issue belongs to the Section Purification Technology)

New Approaches to Phosphorus Pollutant Control and Phosphorus Recovery

edited by Xuejiao Tang

submission deadline 31 May 2026 | 1 articles | Viewed by 648 | Submission Open

Keywords: phosphorus resource recovery; purification; crystallization separation; catalytic decomposition; high value-added

(This special issue belongs to the Section Environmental Separations)

Solid Waste Recycling and Strategic Metal Extraction

edited by

Lihui Gao

Daoguang Teng

Shulei Li

and Chunlin He

submission deadline 10 Jun 2026 | 4 articles | Viewed by 5345 | Submission Open

Keywords: solid waste; biomass; adsorption material; wastewater treatment; strategic metal resources

(This special issue belongs to the Section Separation Engineering)

Design and Optimization of Extraction/Separation Processes for Natural Products

edited by

Xingchu Gong

and

Guanglei Zuo

submission deadline 10 Jun 2026 | 1 articles | Viewed by 366 | Submission Open

Keywords: extraction/separation optimization; natural products; quality by design (QbD); analytical quality by design (AQbD); design of experiments (DoE); process analytical technology (PAT); green extraction; separation and purification; critical quality attributes (CQAs)

(This special issue belongs to the Section Analysis of Natural Products and Pharmaceuticals)

Application of Advanced Oxidation Processes (AOPs) in Wastewater Treatment

edited by Hongwei Sun

submission deadline 10 Jun 2026 | Viewed by 179 | Submission Open

Keywords: advanced oxidation processes; wastewater; catalysts; emerging pollutants; recalcitrant pollutants; cost evaluation; durability

(This special issue belongs to the Section Environmental Separations)

Advances in Technologies Used for Mineral Separation

edited by Qiang Zhao and

Baoyu Cui

submission deadline 10 Jun 2026 | Viewed by 45 | Submission Open

Keywords: mineral processing; separation theory; practical applications; mathematical model; numerical simulation; process intensification; structural design

(This special issue belongs to the Section Separation Engineering)

Advanced Oxidation Processes for Efficient Removal of Organic Pollutants in Water Treatment

edited by

Yan Wang

submission deadline 10 Jun 2026 | Viewed by 37 | Submission Open

Keywords: advanced oxidation processes; degradation of organic pollutants; water treatment; structure of catalysts; catalytic mechanisms

(This special issue belongs to the Section Separation Engineering)

Research on Advanced Oxidation Water Treatment Technology Based on Electrochemical/Chemical Technology in Emerging Pollutants Removal

edited by

Kaikai Zhang

, Shaogang Hu and Chao Li

submission deadline 10 Jun 2026 | Submission Open

Keywords: advanced oxidation processes; emerging pollutants; wastewater treatment; pollutant degradation; electrochemistry; groundwater remediation; water purification; sustainable water treatment

(This special issue belongs to the Section Separation Engineering)

Advances in Separation and Leaching for Metal Recovery

edited by Yun Li and

Hui Xu

submission deadline 20 Jun 2026 | 1 articles | Viewed by 571 | Submission Open

Keywords: metal recovery; separation; leaching; efficiency; selectivity; sustainable recovery

(This special issue belongs to the Section Separation Engineering)

Application of Chromatographic Techniques for the Determination of Active Pharmaceutical Compounds

edited by Juan Li and

Xingchu Gong

submission deadline 20 Jun 2026 | Viewed by 49 | Submission Open

Keywords: drug analysis; method development; chromatography; liquid chromatography– mass spectrometry; bioanalysis; method validation; pharmacokinetics; structural characterization

(This special issue belongs to the Section Analysis of Natural Products and Pharmaceuticals)

Separation Techniques for Wastewater Treatment

edited by

Xiaomin Ma

and Ming Chang

submission deadline 20 Jun 2026 | Viewed by 28 | Submission Open

Keywords: water purification; wastewater treatment and reuse; solid– liquid separation; pollutant removal and detection; flocculant and coagulant; adsorbent and adsorption process; membrane materials for separation; sedimentation and chelation

(This special issue belongs to the Section Purification Technology)

Green Separation and Purification Technology: Second Edition

edited by

Shun Yao

submission deadline 20 Jun 2026 | Viewed by 21 | Submission Open

Keywords: greenness; separations; solvents; materials; assessments

(This special issue belongs to the Section Separation Engineering)

Separation Techniques in Environmental Analysis

edited by

Eliézer Quadro Oreste

and

Sergiane Souza Caldas

submission deadline 20 Jun 2026 | Viewed by 5 | Submission Open

Keywords: separation techniques; chromatography; electrophoresis; sample preparation; fractionation; green microextractions; emerging contaminants; green analytical chemistry; environmental monitoring; analytical validation

(This special issue belongs to the Section Environmental Separations)

Advances in Membrane Technology for Ion Separation

edited by Pengjia Dou

submission deadline 20 Jun 2026 | Viewed by 1 | Submission Open

Keywords: membrane separation; ion separation; ion-selective membranes; electro-membrane processes; resource recovery; water purification; wastewater treatment; novel membrane materials; biomimetic nanochannels; ion separation mechanism

(This special issue belongs to the Section Materials in Separation Science)

Molecularly Imprinting Polymers for Separation and Detection

edited by

Rogelio Flores-Ramírez

and

Karla Ximena Vargas-Berrones

submission deadline 30 Jun 2026 | Viewed by 45 | Submission Open

Keywords: molecularly imprinting polymers; emerging pollutants; water quality; SDGs; sustainable development; green technologies; water bioremediation; environmental health

(This special issue belongs to the Section Materials in Separation Science)

Green Extraction of Natural Products for Application in Pharmaceuticals, Foods, Cosmetics and Agriculture

edited by

Luicita Lagunez-Rivera

, Esther Ramirez Moreno and

Othmane Merah

submission deadline 10 Jul 2026 | 3 articles | Viewed by 2787 | Submission Open

Keywords: plant species sources; orchids; primary metabolites; secondary metabolites; essential oils; fragrances; antioxidant activity; pharmaceutical application; nutraceutical application; molecular nutrition; intestinal bioaccessibility; agricultural uses

(This special issue belongs to the Section Analysis of Natural Products and Pharmaceuticals)

Innovative Sustainable Methods for Food Component Extraction

edited by

Nada Grahovac

, Zorica Stojanovic and Ana Đurović

submission deadline 10 Jul 2026 | 1 articles | Viewed by 938 | Submission Open

Keywords: sustainable separation; food extraction; environmental responsibility; resource minimization; innovative techniques; bioactive compounds; functional foods

(This special issue belongs to the Section Analysis of Food and Beverages)

Eco-Friendly Innovations for Water Purification: Advanced Oxidation and Sustainable Cleanup Solutions

edited by

Szabolcs Bognár

Predrag Putnik

and

Daniela Šojić Merkulov

submission deadline 10 Jul 2026 | 1 articles | Viewed by 823 | Submission Open

Keywords: environmental pollution; water contamination; sustainable water treatment; advanced oxidation processes; electrochemical advanced oxidation processes; organic pollutant removal; green nanotechnology; bioinspired materials

(This special issue belongs to the Section Environmental Separations)

Environmental Functional Materials for Pollutant Separation and Remediation

edited by

Kunlun Yang

, Jian Mei,

Feilong Zhang

and Jingzhen Zhang

submission deadline 10 Jul 2026 | Viewed by 35 | Submission Open

Keywords: environmental functional materials; novel treatment technology; water treatment; emerging pollutants; modification and application

(This special issue belongs to the Section Materials in Separation Science)

Research on Metal Resource Recycling and Efficient Extraction Technologies

edited by Qiongqiong He and Keji Wan

submission deadline 10 Jul 2026 | Viewed by 27 | Submission Open

Keywords: metal recycling; sustainable metallurgy; circular economy; hydrometallurgy; electronic waste (e-waste); resource efficiency; life cycle assessment (LCA); AI-driven optimization

(This special issue belongs to the Section Separation Engineering)

Numerical Modeling and Computation in Separation and Adsorption

edited by Hao Wu

submission deadline 10 Jul 2026 | Viewed by 10 | Submission Open

Keywords: computational fluid dynamics (CFD); mass transfer separation; multiscale simulation; process optimization; multiphase flow; molecular simulation

(This special issue belongs to the Section Separation Engineering)

Advances in Microbial and Enzymatic-Mediated Wastewater Purification

edited by

Lukhanyo Mekuto

submission deadline 31 Jul 2026 | Viewed by 11 | Submission Open

Keywords: emerging contaminants; enzymes; bioremediation; biodegradation; bioconversion; biocatalysis; bioprocess engineering; metabolite profiling

(This special issue belongs to the Section Environmental Separations)

Extraction, Separation, and Recovery of Rare Earth Elements

edited by

Shuainan Ni

and

Zhiyuan Zeng

submission deadline 10 Sep 2026 | Viewed by 186 | Submission Open

Keywords: rare earths recovery; solvent extraction; ion exchange; leaching of rare earths; recycling of rare earths; selective separation of REEs; hydrometallurgical processes; sustainable rare earth technologies

(This special issue belongs to the Section Separation Engineering)

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