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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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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 9586 | 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 8566 | 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)

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 1897 | 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 1700 | 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 307 | 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 282 | 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 6545 | Submission Open

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

Application of Green Flotation Technology in Mineral Processing

edited by Wenli Liu and Qiming Zhuo

submission deadline 20 Jul 2026 | 2 articles | Viewed by 2997 | 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)

Leaching, Flotation, and Separation Technologies for Sustainable Metal Recovery

edited by Yuandong Liu

submission deadline 20 Jul 2026 | Viewed by 384 | 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 228 | 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 9337 | 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 | 4 articles | Viewed by 4323 | 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 4083 | 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 287 | 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 267 | 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 3794 | 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 659 | 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 11197 | 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 873 | 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 326 | 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 286 | 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 211 | 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 5308 | 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 | 2 articles | Viewed by 2314 | 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 186 | 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 2882 | 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 1189 | 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 455 | 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 441 | 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 286 | 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 225 | 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 219 | 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 297 | 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 294 | 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 243 | 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 314 | 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 7306 | 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 11729 | 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 2231 | 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 968 | 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 334 | 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 152 | 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 2076 | 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 9488 | 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)

The Application of Ionic Liquids and Deep Eutectic Solvents in Separation and Extraction Processes

edited by Mi Feng

submission deadline 10 Nov 2026 | 1 articles | Viewed by 754 | Submission Open

Keywords: ionic liquids; deep eutectic solvents; separation processes; extraction processes; solvation behavior; hydrogen bonding network; biomass separation and extraction; liquid–liquid extraction; gas separation; membrane separation

(This special issue belongs to the Section Separation Engineering)

Advanced Separation Media and Technologies for Biomolecules

edited by

Jianbo Qu

submission deadline 10 Nov 2026 | 1 articles | Viewed by 437 | Submission Open

Keywords: separation media; protein separation; antibody separation; nucleic acid separation; exosome isolation; virus-like particles; separation methods; liquid chromatography; solid-phase extraction; modelling

Functional Materials in Adsorption and Separation

edited by

Hui Li

submission deadline 10 Nov 2026 | Viewed by 361 | Submission Open

Keywords: adsorption; separation; functional materials; air purification; porous materials; environmental remediation; gas separation; water treatment

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

Advanced Separation and High-Value Recovery Technologies for Agroindustrial Waste Biorefining

edited by María de Lourdes Ballinas Casarrubias

submission deadline 10 Nov 2026 | Viewed by 258 | Submission Open

Keywords: biorefinery; biomass valorization; membrane-based separations; hybrid separation processes; process intensification; advanced membrane materials; biogenic feedstocks; circular bioeconomy; zero-waste processes; adsorption; chromatography; deep eutectic solvents; solvent-based separations; selective fractionation; platform chemicals

(This special issue belongs to the Section Separation Engineering)

Recovery of Spent Lithium Ion Batteries Using Advanced Separation Methods

edited by

Gavin Harper

Elza Bontempi

and Jake Yang

submission deadline 10 Nov 2026 | Viewed by 198 | Submission Open

Keywords: recycling; upcycling; clean separation; high-value materials recovery; disassembly; delamination; design for recycling; critical materials; lithium ion; circular economy

(This special issue belongs to the Section Separation Engineering)

Advanced Oxidation Processes (AOPs) for Resource Recovery and Disinfection Byproduct Control

edited by

Jiaming Zhang

submission deadline 20 Nov 2026 | 1 articles | Viewed by 967 | Submission Open

Keywords: heavy metal recovery; seawater hydrogen production; nitrogenous disinfection byproducts; halogenated disinfection byproducts; in situ groundwater treatment; ozone oxidation; photocatalytic oxidation; UV activation; catalytic membrane; electrochemical oxidation

(This special issue belongs to the Section Separation Engineering)

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