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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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Materials from Biomass and Waste for Adsorption Applications

edited by

Marija M. Vukčević

submission deadline 30 Jun 2026 | 5 articles | Viewed by 16688 | 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 3605 | Submission Open

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

(This special issue belongs to the Section Environmental Separations)

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 9442 | 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 8346 | 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)

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 | 2 articles | Viewed by 3790 | 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)

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 2283 | 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)

Environmental Functional Materials for Pollutant Separation and Remediation

edited by

Kunlun Yang

, Jian Mei,

Feilong Zhang

and Jingzhen Zhang

submission deadline 10 Jul 2026 | 2 articles | Viewed by 1765 | 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)

Advanced Treatment Technologies for Emerging Contaminant Control and Resource Utilization

edited by

Rui Qin

and

Ying Zhang

submission deadline 10 Jul 2026 | 1 articles | Viewed by 1666 | Submission Open

Keywords: emerging contaminants; advanced oxidation processes; membrane filtration; adsorption; biological treatment; resource recovery

(This special issue belongs to the Section Environmental Separations)

Method Development and Validation for Chromatographic Analysis in Complex Matrices

edited by

Marek Studziński

and Malinowska Irena

submission deadline 10 Jul 2026 | Viewed by 283 | Submission Open

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

(This special issue belongs to the Section Chromatographic Separations)

Recent Advances in Gas Separation

edited by Yalou Guo

submission deadline 10 Jul 2026 | Viewed by 256 | Submission Open

Keywords: gas separation; adsorption; porous materials; MOFs; zeolites; membranes; hydrogen purification; carbon capture; process design and optimization

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

Extraction and Isolation of Nutraceuticals from Plant Foods

edited by

Anamaria Pop

and

Gheorghe Martău

submission deadline 20 Jul 2026 | 2 articles | Viewed by 6427 | Submission Open

Keywords: nutraceuticals; plant-based foods; extraction methods; isolation techniques; green technologies; bioavailability; solvent extraction; supercritical fluid extraction; functional foods; sustainable processes

Innovative Adsorption Materials and Extraction Technology for Food Sample Detection

edited by

Hangzhen Lan

and Peipei Qi

submission deadline 20 Jul 2026 | 2 articles | Viewed by 4779 | Submission Open

Keywords: food; sample preparation; selective extraction; chromatography; mass spectrometry; computational modeling; machine learning

Application of Green Flotation Technology in Mineral Processing

edited by Wenli Liu and Qiming Zhuo

submission deadline 20 Jul 2026 | 2 articles | Viewed by 2910 | Submission Open

Keywords: mineral processing; green flotation technology; flotation reagents; flotation process; waste water treatment; solid waste treatment; flotation equipment; intelligent flotation technologies; resource recycling; pollution control

(This special issue belongs to the Section Separation Engineering)

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 | 1 articles | Viewed by 695 | 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)

Leaching, Flotation, and Separation Technologies for Sustainable Metal Recovery

edited by Yuandong Liu

submission deadline 20 Jul 2026 | Viewed by 376 | Submission Open

Keywords: metal recovery; separation; leaching; bioleaching; ion exchange; adsorption; solvent extraction; electrolysis; minerals processing; flotation

(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 219 | 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)

Separation Technology for Resource Utilization and Recovery

edited by

Hao Li

submission deadline 31 Jul 2026 | 4 articles | Viewed by 9189 | Submission Open

Keywords: separation technology; membrane separation; extraction; adsorption separation; electrochemical separation; molecular recognition; molecular/ion imprinting; resource recovering; metal recycling; environment application

(This special issue belongs to the Section Separation Engineering)

New Techniques for Extraction and Removal of Pesticide Residues

edited by Zhonghua Yang

submission deadline 31 Jul 2026 | 3 articles | Viewed by 4105 | Submission Open

Keywords: pesticide multi-residue analysis; green extraction; smart purification; environmental remediation; AI-driven optimization

(This special issue belongs to the Section Environmental Separations)

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 4029 | 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 273 | 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 261 | Submission Open

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

(This special issue belongs to the Section Environmental Separations)

Advanced Separation Methods for Safety Assessment and Valorization of By-Products

edited by

Mikel Añibarro-Ortega

and

José Pinela

submission deadline 10 Aug 2026 | 1 articles | Viewed by 3722 | Submission Open

Keywords: crop by-product valorization; agri-food by-products; safety assessment; analytical methods; bioactive compounds; separation methods; upcycling; sustainable processing; food safety; nutraceuticals

(This special issue belongs to the Section Purification Technology)

Advanced Materials for Heavy Metal Adsorption in Wastewater Treatment

edited by Jiahui Zhu and Huiquan Gu

submission deadline 10 Aug 2026 | 1 articles | Viewed by 580 | Submission Open

Keywords: adsorption; water treatment; heavy metal ion; membrane separation; nanomaterials

(This special issue belongs to the Section Separation Engineering)

Extraction, Purification and Functional Substances of Natural Products and Plants

edited by

Xiumei Li

submission deadline 20 Aug 2026 | 9 articles | Viewed by 10682 | Submission Open

Keywords: extraction; separation and purification; chromatography; membrane separation; solvent extraction method; macroporous resin adsorption method; functional substances; flavonoids; polyphenol; polysaccharide; identification; natural products

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

The Latest Progress in the Coal-Based Solid Waste Particle Separation

edited by Haisheng Li

submission deadline 20 Aug 2026 | 1 articles | Viewed by 849 | Submission Open

Keywords: separation; solid waste; gravity sorting; flotation; electrostatic separation; ultrafine particles; intelligent sorting; intelligent control; machine vision; dry sorting; high-value utilization; mineral materials; industrial dust removal

(This special issue belongs to the Section Separation Engineering)

Advances in Chromatographic Separation Techniques for the Analysis of Drugs of Abuse

edited by

Rossella Barone

and Jennifer Pascali

submission deadline 20 Aug 2026 | Viewed by 320 | Submission Open

Keywords: toxicology; mass spectrometry; biological matrices; psychoactive substances; method development; validation

(This special issue belongs to the Section Chromatographic Separations)

Green and Efficient Solvent Extraction: Advances in Technology and Equipment

edited by

Shaowei Li

submission deadline 20 Aug 2026 | Viewed by 274 | Submission Open

Keywords: solvent design; extraction mechanism; extraction technology development; new application of solvent extraction; extraction equipment; two-phase flow in extraction; micro-extractor; numerical simulation of solvent extraction; AI in solvent extraction

(This special issue belongs to the Section Separation Engineering)

Extraction and Analysis of Chemical Composition from Natural Products and Metabolites (2nd Edition)

edited by

Aurea Bernardino-Nicanor

and

Leopoldo González Cruz

submission deadline 20 Aug 2026 | Viewed by 200 | Submission Open

Keywords: HPLC separation; metabolites separation; non-conventional separation techniques; gas chromatography; protein separation; pigment separation; separation and characterization of carbohydrates

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

Applications of Adsorbent Materials in Water and Wastewater Treatment

edited by Dragana Živojinović

submission deadline 31 Aug 2026 | 3 articles | Viewed by 5225 | 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 2128 | 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)

Separation and Extraction Technology in Mineral Processing: Second Edition

edited by Guixia Fan

submission deadline 31 Aug 2026 | Viewed by 168 | Submission Open

Keywords: fine-grained minerals; surface and interface process; adsorption kinetics; flotation mechanism; molecular dynamics simulation; solution chemistry; selective separation; reagent development

(This special issue belongs to the Section Separation Engineering)

Application of Chromatography in Bioactive Compound Analysis

edited by

Milan N. Mitić

, Vesna Stankov-Jovanovic and Jelena S. Nikolić

submission deadline 10 Sep 2026 | 2 articles | Viewed by 2809 | Submission Open

Keywords: analytical method validation; sample preparation; antioxidant compounds; phytochemicals; chromatography; bioactive compounds; natural products; LC-MS; HPLC; GC-MS

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

Separation Techniques in Recovery of Valuable Metal Resources

edited by

Yakun Zhang

and Zhengjie Chen

submission deadline 10 Sep 2026 | 1 articles | Viewed by 1132 | Submission Open

Keywords: valuable metal recovery; separation techniques; secondary resources and wastes; selective separation; green and sustainable processes; process modeling and optimization; mechanism and characterization; resource recycling and circular economy

(This special issue belongs to the Section Separation Engineering)

Application of Ionic Liquids to Extraction Separation

edited by

Pedro Arce

submission deadline 10 Sep 2026 | Viewed by 444 | Submission Open

Keywords: ionic liquids; phase equilibrium; separation processes; molecular dynamics simulation; COSMOTherm; equations of state

(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 428 | 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)

Advanced Separation and Adsorption Technologies for Non-CO₂ Greenhouse Gas Management

edited by Xia Gui

submission deadline 10 Sep 2026 | Viewed by 273 | Submission Open

Keywords: non-CO2 greenhouse gases; selective adsorption; membrane separation; resource utilization; MOFs composites; process intensification

(This special issue belongs to the Section Separation Engineering)

Advanced Functional Materials and Membranes for Water Treatment

edited by

Hongbo Du

and Li Yan

submission deadline 10 Sep 2026 | Viewed by 216 | Submission Open

Keywords: microfiltration; ultrafiltration; nanofiltration; forward osmosis; reverse osmosis; membrane distillation; ceramic membrane; membrane bioreactor

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

Research on Separation and Purification Techniques of VOCs Emissions

edited by

Xiao-Min Liu

submission deadline 10 Sep 2026 | Viewed by 210 | Submission Open

Keywords: air pollution; composite materials; VOCs; adsorption; catalytic degradation

(This special issue belongs to the Section Purification Technology)

Metal–Organic Frameworks (MOFs) Materials in Separation Science and Technology

edited by

Anastasios I. Zouboulis

and

Athanasia K. Tolkou

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

Keywords: metal– organic frameworks (MOFs); liquid– solid separation; water treatment; wastewater treatment; heavy metal removal; pharmaceutical contaminants; antibiotics removal; emerging pollutants; MOF-based membranes; regeneration and reusability

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

Separation Methods and Process Intensification in the Mining Industry

edited by Long Huang,

Haishen Jiang

, Yanjiao Li and Miao Pan

submission deadline 20 Sep 2026 | Viewed by 277 | Submission Open

Keywords: fine screening; microfine powder classification; heavy-media separation; dry separation; solid– liquid separation; process optimization; sorting and upgrading; intelligent and precise sorting; process intelligent control; classification of coal rock components; green disposal and comprehensive utilization of coal-based waste; tailings cascade separation

(This special issue belongs to the Section Separation Engineering)

Fine Coal Separation and Dust Control: Theory, Technology and Equipment

edited by

Liang Shen

and

Lingyun Liu

submission deadline 20 Sep 2026 | Viewed by 232 | Submission Open

Keywords: fine coal; separation; flotation; coal preparation; interfacial phenomena; wastewater treatment; coal dust; dust control; process intensification; surface chemistry

(This special issue belongs to the Section Purification Technology)

Separation Technology and Equipment in Mineral Processing

edited by

Panpan Fan

and

Liang Shen

submission deadline 30 Sep 2026 | Viewed by 303 | Submission Open

Keywords: mineral processing separation technology; coal-based solid waste separation equipment; complex ore separation process; high-performance separation materials; intelligent separation control; low-carbon separation process; industrial-scale separation demonstration; fine-grained ore separation

(This special issue belongs to the Section Separation Engineering)

Sustainable and Intelligent Process Control of Pollutant Separation and Purification

edited by Nuan Yang and

Bing Yang

submission deadline 10 Oct 2026 | 2 articles | Viewed by 7092 | Submission Open

Keywords: antibiotic degradation; artificial intelligence; biological purification technology; ecological toxicology; environmental catalyst; low-carbon pathway; microbe– environment interactions; new emerging pollutants; pollutant purification; soil remediation; waste treatment

(This special issue belongs to the Section Purification Technology)

Optimization of Advanced Separation Technologies for the Analysis of Emerging Contaminants

edited by

Barbara Benedetti

and

Caterina Durante

submission deadline 20 Oct 2026 | 6 articles | Viewed by 11416 | Submission Open

Keywords: emerging contaminants; water; food contamination; design of experiments; multivariate analysis; gas chromatography; liquid chromatography; low- and high-resolution mass spectrometry; sample preparation

Research on Novel Separation Media and Separation/Analysis Technologies

edited by Qiongwei Yu and

Di Chen

submission deadline 20 Oct 2026 | 2 articles | Viewed by 2157 | Submission Open

Keywords: gas phase chromatography; liquid phase chromatography; supercritical fluid chromatography; separation; purification; adsorption; identification; solid-phase extraction; liquid-phase extraction; derivatization

(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 | 1 articles | Viewed by 913 | Submission Open

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

(This special issue belongs to the Section Chromatographic Separations)

Porous Carbon Materials for Water Pollution Treatment: Adsorption and Catalysis

edited by Yizhen Cheng, Pengwei Yan and Yabin Li

submission deadline 20 Oct 2026 | Viewed by 320 | Submission Open

Keywords: carbon materials; adsorption; catalysis; water treatment; porous carbon

(This special issue belongs to the Section Environmental Separations)

Resource Recovery from Complex Wastewaters: Materials, Technologies, and Strategies

edited by Zhaoji Zhang

submission deadline 20 Oct 2026 | Viewed by 138 | Submission Open

Keywords: resource recovery; complex water matrices; selective separation; electrochemical technologies; techno-economic analysis; unconventional produced water

(This special issue belongs to the Section Environmental Separations)

Recognition Materials and Separation Applications

edited by Shucheng Liu

submission deadline 31 Oct 2026 | 2 articles | Viewed by 2029 | Submission Open

Keywords: extraction; molecular recognition; purification; sensors; adsorption; catalysis

(This special issue belongs to the Section Separation Engineering)

Recent Advances in Rare Earth Separation and Extraction

edited by

Junlian Wang

and Na Sui

submission deadline 10 Nov 2026 | 7 articles | Viewed by 9247 | Submission Open

Keywords: rare earths; solvent extraction; separation technology; extraction chromatography; recovery; low concentration enrichment; adsorption; calculations

(This special issue belongs to the Section Separation Engineering)

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