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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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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 233 | 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 222 | 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 3109 | 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 | Viewed by 351 | 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 | 8 articles | Viewed by 7459 | 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 374 | 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 269 | 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 214 | 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 158 | 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 4626 | 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 1809 | 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 118 | 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 | 1 articles | Viewed by 2376 | 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 715 | 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 359 | 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 358 | 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 214 | 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 183 | 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 168 | Submission Open

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

(This special issue belongs to the Section Purification Technology)

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 220 | 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)

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 211 | 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)

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

edited by

Liang Shen

and

Lingyun Liu

submission deadline 20 Sep 2026 | Viewed by 187 | 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 250 | 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 6156 | 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 9037 | 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 1798 | 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 634 | 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 244 | 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 91 | 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 1633 | 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 7051 | 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 382 | 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 | Viewed by 330 | 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 300 | 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)

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 130 | 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 Separation and High-Value Recovery Technologies for Agroindustrial Waste Biorefining

edited by María de Lourdes Ballinas Casarrubias

submission deadline 10 Nov 2026 | Viewed by 104 | 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)

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

edited by

Jiaming Zhang

submission deadline 20 Nov 2026 | 1 articles | Viewed by 656 | 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)

Selected Papers from the 29th International Symposium on Separation Sciences (ISSS 2025)

edited by

Živoslav Lj. Tešić

Branka Ivković

and

Milica Kalaba

submission deadline 20 Nov 2026 | Viewed by 413 | Submission Open

Keywords: chromatography; sample preparation techniques; environmental analysis; food analysis; pharmaceutical analysis; clinical analysis; forensic analysis; natural product analysis; industrial analysis; chemometrics

Advances in Multiphase Fluid Separation Technology

edited by

Xiaoli Zhu

submission deadline 20 Nov 2026 | Viewed by 72 | Submission Open

Keywords: multiphase flow separation; interfacial dynamics; separation intensification separator; industrial application

(This special issue belongs to the Section Separation Engineering)

Extraction and Characterization of Food Components

edited by

Bárbara Elisabeth Teixeira Costa

submission deadline 30 Nov 2026 | 4 articles | Viewed by 14216 | Submission Open

Keywords: extraction; green extraction methods; optimization; bioactive compounds; nutrients; antioxidants; food matrix; food by-products; lipid extraction; characterization

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

Sample Preparation and Chromatographic Analysis of Environmental Samples

edited by Rosangela Elliani and

Antonio Tagarelli

submission deadline 30 Nov 2026 | 4 articles | Viewed by 9062 | Submission Open

Keywords: assessment of several organic compounds; chromatography analysis; analytical parameters; multivariate optimization; sample extraction; enviromentally friendly analytical methods

(This special issue belongs to the Section Chromatographic Separations)

Engineering the Loop: Advancing Wastewater Treatment and Sludge Valorization Through Innovative Separation Materials

edited by

Anita Leovac Maćerak

and

Djurdja V. Kerkez

submission deadline 30 Nov 2026 | 2 articles | Viewed by 2928 | Submission Open

Keywords: wastewater; sludge; circular economy; anaerobic digestion; resource recovery; advanced oxidation processes; adsorption; pollutants

(This special issue belongs to the Section Separation Engineering)

Separation Process for Sustainable Utilization of Bioresources

edited by

Hideo Maruyama

submission deadline 30 Nov 2026 | 1 articles | Viewed by 1355 | Submission Open

Keywords: biomass; bioresource utilization; sustainability; separation; separation engineering; chemical engineering

(This special issue belongs to the Section Separation Engineering)

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

edited by

Junzhuo Cai

submission deadline 30 Nov 2026 | 1 articles | Viewed by 788 | 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)

Next-Generation Waste-Derived Separation Materials for Circular Economy Water and Wastewater Treatment

edited by

Tebogo Mashifana

and

Farshid Pahlevani

submission deadline 30 Nov 2026 | Viewed by 212 | Submission Open

Keywords: sustainable materials; separation technologies; circular economy; waste valorization; emerging contaminants

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

Separation Technology in Mineral Processing

edited by

Ruxia Chen

and Zeyu Feng

submission deadline 10 Dec 2026 | 3 articles | Viewed by 1652 | Submission Open

Keywords: dewatering; flocculation; flotation; selective aggregation; water recycling; bubble– particle interactions; reagents

(This special issue belongs to the Section Separation Engineering)

Efficient Separation of Coal and Mineral Resources

edited by Yadong Zhang, Guangqing Zhu and Xuan Xu

submission deadline 10 Dec 2026 | Viewed by 106 | Submission Open

Keywords: mineral separation; gas-solid fluidization; composite force field; reselect; density segregation

(This special issue belongs to the Section Separation Engineering)

Design and Preparation of Sustainable Separation Membrane for Efficient Water Purification

edited by

Shuping Wu

and

Rui Zhao

submission deadline 20 Dec 2026 | 5 articles | Viewed by 17849 | 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)

Novel Solvents and Methods in Distillation Process

edited by Qunsheng Li and Hongkang Zhao

submission deadline 20 Dec 2026 | 4 articles | Viewed by 4966 | Submission Open

Keywords: extractive distillation; distillation simulation; CFD simulation; Aspen simulation; mass transfer and separation; phase equilibrium research

(This special issue belongs to the Section Separation Engineering)

Membrane Separation Process for Water Treatment

edited by Fang Li

submission deadline 20 Dec 2026 | 2 articles | Viewed by 1883 | 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)

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