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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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Photo-/Electro-/Photoelectro-Catalytic Removal of Pollutants in Environmental Matrices

edited by

Junzhuo Cai

submission deadline 4 Apr 2026 | 1 articles | Viewed by 663 | Submission Open

Keywords: photoelectrocatalysis; emerging pollutants; heterogeneous catalyst; flow-through reactor; capacitive deionization; advanced oxidation processes; photoelectrocatlytic oxidation/reduction; electro-sorption; photo-/electro-/photoelectro-sensors

(This special issue belongs to the Section Environmental Separations)

Research on New Technology and Equipment of Multiphase Flow Separation

edited by Chencan Du and

Yubin Wang

submission deadline 10 Apr 2026 | 4 articles | Viewed by 14508 | Submission Open

Keywords: multiphase flow; separation technology; equipment design; process intensification; fluid dynamics; computational modeling; mass transfer; sustainable processes; environmental impact

(This special issue belongs to the Section Separation Engineering)

Novel Solvents and Methods for Extraction of Chemicals

edited by Silvia Fraterrigo Garofalo and Giuseppe Pipitone

submission deadline 10 Apr 2026 | 5 articles | Viewed by 11876 | Submission Open

Keywords: sustainable extraction; chemical separation; innovative solvents; environmental sustainability; advanced extraction methods

(This special issue belongs to the Section Separation Engineering)

Research Progress of Gas–Solid Fluidized Dry Separation

edited by Chenyang Zhou

submission deadline 10 Apr 2026 | 5 articles | Viewed by 5713 | Submission Open

Keywords: gas-solid fluidized bed; bubble behavior; gas– solid fluidization simulation; dry coal separation; two-phase theory; bed density stability

(This special issue belongs to the Section Separation Engineering)

Design and Preparation of Environmental Functional Materials for Pollutant Removal

edited by Yujun Zhou and Jianfei Li

submission deadline 10 Apr 2026 | 1 articles | Viewed by 3411 | Submission Open

Keywords: wastewater treatment; membrane separation; electrochemical technology; adsorption; resource recovery; electrodes and reactor design; wastewater treatment

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

Removal of Environmental Pollutants and Bioremediation Strategies

edited by

Xinlin Zhao

and

Shuaishuai Gao

submission deadline 10 Apr 2026 | 1 articles | Viewed by 1829 | Submission Open

Keywords: environmental pollutants; pollutant fate and transport; contaminant degradation; microbial remediation; phytoremediation; heavy metal; organic pollutant; bioremediation; eco-toxicological risk assessment

Photoelectrocatalytic Organic Pollutant Degradation and Water Splitting

edited by Xingming Ning

submission deadline 10 Apr 2026 | 1 articles | Viewed by 584 | Submission Open

Keywords: interface charge transfer; organic pollutant degradation; photoelectrocatalytic; photogenerated charge carrier; charge separation; water splitting

(This special issue belongs to the Section Environmental Separations)

Innovative Strategies for Efficient Heavy Metal Removal in Water

edited by

Chengbin Liu

and Huiling Liu

submission deadline 10 Apr 2026 | Viewed by 425 | Submission Open

Keywords: heavy metal removal; next-generation adsorbents; membrane technologies; hybrid separation processes; resource recovery; AI-driven process

(This special issue belongs to the Section Environmental Separations)

Absorption, Adsorption Technologies and Materials of Industrial Exhaust

edited by Zhi Qian, Le Sang and

Guojie Zhang

submission deadline 10 Apr 2026 | Viewed by 401 | Submission Open

Keywords: adsorption; material; process intensification; industrial exhaust; multiple pollutants; optimization; interdisciplinary; synergy; cutting-edge

(This special issue belongs to the Section Environmental Separations)

Advancements in Biochar and Activated Carbon for Efficient Water Treatment and Pollutant Adsorption

edited by

Jie Yuan

and Zedong Lu

submission deadline 15 Apr 2026 | Viewed by 155 | Submission Open

Keywords: biochar; activated carbon; water treatment; adsorption; sustainable adsorbent

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

Design and Preparation of Sustainable Separation Membrane for Efficient Water Purification

edited by

Shuping Wu

and

Rui Zhao

submission deadline 20 Apr 2026 | 5 articles | Viewed by 16624 | Submission Open

Keywords: membrane separation; water purification; sustainable materials; membrane fabrication; membrane characterization; desalination; wastewater treatment; bio-based membranes; carbon-based membranes; membrane fouling

(This special issue belongs to the Section Environmental Separations)

Membrane Separation Process for Water Treatment

edited by Fang Li

submission deadline 20 Apr 2026 | 1 articles | Viewed by 1414 | Submission Open

Keywords: advanced separation techniques; resource recovery; environmental conservation; water treatment; membrane separation process

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

Photocatalytic Oxidation and Advanced Oxidation Processes for Sustainable Water Treatment

edited by

Haojie Zhang

Hanxuan Zeng

and Yi Duan

submission deadline 20 Apr 2026 | 1 articles | Viewed by 1247 | Submission Open

Keywords: advanced oxidation processes (AOPs); photocatalysis; emerging contaminants; reactive oxygen species (ROS); degradation pathways; water and wastewater treatment

(This special issue belongs to the Section Separation Engineering)

Advances in Gas–Solid Separation for Solid Waste Recovery

edited by Yuanhe Yue

submission deadline 20 Apr 2026 | 1 articles | Viewed by 1055 | Submission Open

Keywords: gas– solid separation; solid waste; resource recovery; dust removal technology; circular economy; pollution control

(This special issue belongs to the Section Separation Engineering)

Electrochemical Separation and Recovery Technology in Wastewater Treatment

edited by

Ran Mao

submission deadline 20 Apr 2026 | 1 articles | Viewed by 687 | Submission Open

Keywords: electrochemical wastewater treatment; resource recovery; electrooxidation; electroreduction; heavy metal complexes; nitrate; phosphorus; electro-Fenton

(This special issue belongs to the Section Environmental Separations)

Advanced Separation Technology for Nutrient Removal and Recovery

edited by

Lei Li

and Hui Xu

submission deadline 30 Apr 2026 | Viewed by 176 | Submission Open

Keywords: nutrient recovery; wastewater treatment; membrane separation; struvite crystallization; adsorption; ion exchange; electrochemical methods; solid waste; life cycle assessment; circular economy

(This special issue belongs to the Section Environmental Separations)

Determination and Quantification of Pharmaceuticals Using Chromatography Methods

edited by

Karol Wróblewski

and

Małgorzata Szultka-Młyńska

submission deadline 10 May 2026 | 3 articles | Viewed by 3955 | Submission Open

Keywords: chromatography; method validation; drug analysis; pharmaceutical analysis; analytical method development; pharmaceutical formulations; mass spectrometry

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

Application of Chromatographic Technology in Natural Medicine Research

edited by He Ni

submission deadline 10 May 2026 | 1 articles | Viewed by 2743 | 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 157 | 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)

Adsorption/Degradation for Environmental Pollutants

edited by Xiaoying Guo and Jie Zhang

submission deadline 15 May 2026 | 1 articles | Viewed by 291 | Submission Open

Keywords: pollutant separation; sorption mechanisms; chemical and biological degradation; environmental remediation; environmental pollution control

(This special issue belongs to the Section Environmental Separations)

Isolation and Identification of Biologically Active Natural Compounds

edited by

Iulia Varzaru

and

Arabela Elena Untea

submission deadline 20 May 2026 | 7 articles | Viewed by 14404 | 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 1678 | 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 1024 | 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)

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 306 | 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)

Adsorbent Materials for Wastewater Treatment

edited by Che-Jung Hsu

submission deadline 20 May 2026 | Viewed by 263 | 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)

Natural Product Separation and Characterization of Bioactive Plant Compounds

edited by Maria Luiza Zeraik

submission deadline 30 May 2026 | 2 articles | Viewed by 1566 | 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 | 5 articles | Viewed by 8894 | 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 1353 | Submission Open

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

(This special issue belongs to the Section Environmental Separations)

Application of Sustainable Separation Techniques in Food Processing

edited by Beatriz Cervejeira Bolanho Barros and Huafeng Zhang

submission deadline 10 Jun 2026 | 5 articles | Viewed by 13420 | Submission Open

Keywords: sustainable process; extraction; distillation; centrifugation; filtration; decantation; bioactive compounds

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

Solid Waste Recycling and Strategic Metal Extraction

edited by

Lihui Gao

Daoguang Teng

Shulei Li

and Chunlin He

submission deadline 10 Jun 2026 | 5 articles | Viewed by 10748 | Submission Open

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

(This special issue belongs to the Section Separation Engineering)

Application of Adsorption and Separation Technologies in Water Treatment

edited by Jelena Mitrović,

Nena Velinov

and

Miljana Radović Vučić

submission deadline 10 Jun 2026 | 2 articles | Viewed by 2402 | Submission Open

Keywords: adsorption; separation technologies; water treatment; adsorbent preparation; pollutant removal; water contaminants

(This special issue belongs to the Section Environmental Separations)

Design and Optimization of Extraction/Separation Processes for Natural Products

edited by

Xingchu Gong

and

Guanglei Zuo

submission deadline 10 Jun 2026 | 3 articles | Viewed by 1980 | 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)

Advanced Separation Technology for Sludge Wastewater Treatment and Resource Utilization

edited by Bingdi Cao

submission deadline 10 Jun 2026 | 1 articles | Viewed by 1208 | Submission Open

Keywords: sludge; solid– liquid separation; dewatering agent; extracellular polymeric substances (EPSs); electro-dewatering; coagulants

(This special issue belongs to the Section Purification Technology)

Advances in Technologies Used for Mineral Separation

edited by Qiang Zhao and

Baoyu Cui

submission deadline 10 Jun 2026 | 1 articles | Viewed by 608 | 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)

Application of Advanced Oxidation Processes (AOPs) in Wastewater Treatment

edited by Hongwei Sun

submission deadline 10 Jun 2026 | Viewed by 298 | Submission Open

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

(This special issue belongs to the Section Environmental Separations)

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

edited by

Yan Wang

submission deadline 10 Jun 2026 | Viewed by 209 | 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 | Viewed by 206 | 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 1826 | Submission Open

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

(This special issue belongs to the Section Separation Engineering)

Research on Separation Techniques for Metabolomics and Pharmacokinetics Analysis

edited by

Mamunur Rashid

submission deadline 20 Jun 2026 | Viewed by 301 | Submission Open

Keywords: metabolomics; pharmacokinetics; mass spectrometry; UPLC; supercritical fluid chromatography (SFC); separation technology; biomarker discovery; personalized medicine

(This special issue belongs to the Section Bioanalysis/Clinical Analysis)

Green Separation and Purification Technology: Second Edition

edited by

Shun Yao

submission deadline 20 Jun 2026 | Viewed by 287 | Submission Open

Keywords: greenness; separations; solvents; materials; assessments

(This special issue belongs to the Section Separation Engineering)

Separation Techniques for Wastewater Treatment

edited by

Xiaomin Ma

and Ming Chang

submission deadline 20 Jun 2026 | Viewed by 219 | 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)

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 207 | 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 in Environmental Analysis

edited by

Eliézer Quadro Oreste

and

Sergiane Souza Caldas

submission deadline 20 Jun 2026 | Viewed by 201 | 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 Separation

edited by Pengjia Dou

submission deadline 20 Jun 2026 | Viewed by 187 | Submission Open

Keywords: membrane separation; membrane technology; ion separation; molecular separation; electro-membrane processes; resource recovery; water purification; wastewater treatment; novel membrane materials; separation mechanism

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

Materials from Biomass and Waste for Adsorption Applications

edited by

Marija M. Vukčević

submission deadline 30 Jun 2026 | 5 articles | Viewed by 14419 | Submission Open

Keywords: adsorption; biosorption; biomass; waste materials; materials modification; organic pollutants; inorganic pollutants; water purification; adsorption mechanism

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

Microbial Methods for Pollutant Removal and Wastewater Treatment

edited by Ivana D. Radojević

submission deadline 30 Jun 2026 | 1 articles | Viewed by 2557 | Submission Open

Keywords: microorganisms; biological wastewater treatment; biofilms; environmental pollutants; microbiological

(This special issue belongs to the Section Environmental Separations)

Novel Functional Separation Materials for Water Treatment

edited by

Zhujian Huang

and

Xinjiang Hu

submission deadline 30 Jun 2026 | 1 articles | Viewed by 737 | Submission Open

Keywords: advanced oxidation processes; nanomaterials for water treatment; membrane technology; electrochemical water treatment; sustainable water purification; contaminant removal; resource recovery; hybrid treatment systems; bio-based adsorbents; water– energy nexus

(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 121 | 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 | 4 articles | Viewed by 7585 | 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)

Advances in the Analysis of Bioactive Plant Extracts: Separation Techniques and Their Applications

edited by Saša Savić, Sanja Petrovic and

Zorica Knežević-Jugović

submission deadline 10 Jul 2026 | 4 articles | Viewed by 5135 | Submission Open

Keywords: natural products; pharmaceutical analysis; bioactive compounds; chromatographic techniques; spectroscopic methods; LC-MS/ICP-OES/GC-MS/NMR; metabolite profiling; stability testing and quality control

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

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