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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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Innovative Strategies for Efficient Heavy Metal Removal in Water

edited by

Chengbin Liu

and Huiling Liu

submission deadline 10 Apr 2026 | Viewed by 262 | 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 213 | 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)

Design and Preparation of Sustainable Separation Membrane for Efficient Water Purification

edited by

Shuping Wu

and

Rui Zhao

submission deadline 20 Apr 2026 | 4 articles | Viewed by 7664 | 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)

Photocatalytic Oxidation and Advanced Oxidation Processes for Sustainable Water Treatment

edited by

Haojie Zhang

Hanxuan Zeng

and Yi Duan

submission deadline 20 Apr 2026 | Viewed by 55 | 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 | Viewed by 44 | 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)

Advanced Separation Technology for Nutrient Removal and Recovery

edited by

Lei Li

and Hui Xu

submission deadline 30 Apr 2026 | Viewed by 38 | 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)

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 31 | 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)

Application of Chromatographic Technology in Natural Medicine Research

edited by He Ni

submission deadline 10 May 2026 | Viewed by 28 | Submission Open

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

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

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 523 | 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)

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 | Viewed by 48 | 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)

Adsorbent Materials for Wastewater Treatment

edited by Che-Jung Hsu

submission deadline 20 May 2026 | Viewed by 48 | 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 5 | 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 17 | 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 4236 | 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 | Viewed by 159 | Submission Open

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

(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 25 | 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)

Design and Optimization of Extraction/Separation Processes for Natural Products

edited by

Xingchu Gong

and

Guanglei Zuo

submission deadline 10 Jun 2026 | Viewed by 24 | 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 Oxidation Processes for Efficient Removal of Organic Pollutants in Water Treatment

edited by

Yan Wang

submission deadline 10 Jun 2026 | Viewed by 15 | 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)

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 13 | 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)

Molecularly Imprinting Polymers for Separation and Detection

edited by

Rogelio Flores-Ramírez

and

Karla Ximena Vargas-Berrones

submission deadline 30 Jun 2026 | Viewed by 7 | 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)

Extraction, Separation, and Recovery of Rare Earth Elements

edited by

Shuainan Ni

and

Zhiyuan Zeng

submission deadline 10 Sep 2026 | Viewed by 140 | 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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