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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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Advances in Separation and Leaching for Metal Recovery

edited by Yun Li and

Hui Xu

submission deadline 20 Jun 2026 | 1 articles | Viewed by 1028 | 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 208 | 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 128 | 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 82 | 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)

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 77 | 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 52 | 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)

Advances in Membrane Technology for Ion Separation

edited by Pengjia Dou

submission deadline 20 Jun 2026 | Viewed by 33 | 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)

Novel Functional Separation Materials for Water Treatment

edited by

Zhujian Huang

and

Xinjiang Hu

submission deadline 30 Jun 2026 | 1 articles | Viewed by 259 | 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 67 | 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 4098 | 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 1219 | 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 1182 | 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 120 | 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 47 | 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 45 | 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)

Preparation and Application of Carbon-Based Materials in Pollutant Removal

edited by

Shangyi Li

submission deadline 10 Jul 2026 | Viewed by 24 | Submission Open

Keywords: carbon-based materials; water and wastewater treatment; adsorption technology; advanced catalytic oxidation; pollutants removal; large-scale deployment

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

Method Development and Validation for Chromatographic Analysis in Complex Matrices

edited by

Marek Studziński

and Malinowska Irena

submission deadline 10 Jul 2026 | Viewed by 21 | Submission Open

Keywords: design of experiments; method optimization; complex matrices; multidimensional chromatography; sample preparation

(This special issue belongs to the Section Chromatographic Separations)

Biological Removal of Emerging Contaminants: Toxicological Effects and Process Mechanisms

edited by Yongfu Li and Litao Zhang

submission deadline 20 Jul 2026 | Viewed by 141 | Submission Open

Keywords: emerging contaminants; microplastics; nanomaterial; pharmaceuticals and personal care products (PPCPs); bio-toxicity; bio-removal technologies and mechanisms

Recent Advances in Carbon Dioxide Capture, Utilization, and Storage Technology

edited by Pengfei Wang,

Ying Teng

Shuyang Liu

and Bingbing Chen

submission deadline 20 Jul 2026 | Viewed by 35 | Submission Open

Keywords: CO2 capture utilization and storage (CCUS); carbon neutrality; porous and functional materials; membrane and adsorption technologies; saline aquifer sequestration; multiphase flow and transport; source– sink matching; hydrate-based separation; geomechanics and reservoir monitoring

(This special issue belongs to the Section Separation Engineering)

Green Separation Chemistry and Technique for Rare Earth Elements

edited by

Hongmin Cui

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

Keywords: green solvent extraction; ionic liquids; deep eutectic solvents; sustainable hydrometallurgy; membrane separation; selective adsorption; recycling; waste minimization

(This special issue belongs to the Section Separation Engineering)

State of the Art and Challenges in the Analysis of Volatile Organic Compounds

edited by Jérôme Vial and

Sylvain Antoniotti

submission deadline 31 Jul 2026 | 2 articles | Viewed by 2295 | Submission Open

Keywords: GC-MS; GCxGC; headpsace techniques; chemometrics; volatolomic; scent sampling; aroma; thermodeorption

(This special issue belongs to the Section Chromatographic Separations)

Waste-Derived Materials for Separation Processes in Water and Wastewater Treatment

edited by

Natália Ueda Yamaguchi

and Karina Querne de Carvalho

submission deadline 31 Jul 2026 | Viewed by 68 | Submission Open

Keywords: waste valorization; circular economy; water treatment; wastewater treatment; adsorption; membrane processes; coagulation– flocculation; ion exchange; low-cost adsorbent; upcycling

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

Advances in Microbial and Enzymatic-Mediated Wastewater Purification

edited by

Lukhanyo Mekuto

submission deadline 31 Jul 2026 | Viewed by 45 | Submission Open

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

(This special issue belongs to the Section Environmental Separations)

Applications of Adsorbent Materials in Water and Wastewater Treatment

edited by Dragana Živojinović

submission deadline 31 Aug 2026 | 3 articles | Viewed by 1900 | Submission Open

Keywords: adsorption; biosorbent; biomass-derived material; waste materials; eco-friendly adsorbents; water treatment; pollutant removal; organic pollutants; inorganic pollutants

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

Innovative Separation Techniques for Sustainable Recycling of Solid Waste

edited by

Yuanpeng Fu

and Zhen Shang

submission deadline 31 Aug 2026 | 1 articles | Viewed by 1163 | Submission Open

Keywords: solid waste; pretreatment; separation; pyrometallurgical technologies; leaching; separation and purification; regeneration; direct repair technology

(This special issue belongs to the Section Purification Technology)

Extraction, Separation, and Recovery of Rare Earth Elements

edited by

Shuainan Ni

and

Zhiyuan Zeng

submission deadline 10 Sep 2026 | Viewed by 215 | 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)

Advancements in Microextraction Techniques for Environmental and Food Sample Analysis

edited by Nikita Tawanda Tavengwa

submission deadline 20 Oct 2026 | Viewed by 27 | Submission Open

Keywords: trace analysis; emerging organic pollutants; sample preparation; pre-concentration; modern extraction techniques

(This special issue belongs to the Section Chromatographic Separations)

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