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

edited by

Mikel Añibarro-Ortega

and

José Pinela

submission deadline 31 Dec 2025 | 1 articles | Viewed by 1710 | 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)

New Techniques for Extraction and Removal of Pesticide Residues

edited by Zhonghua Yang

submission deadline 31 Dec 2025 | 1 articles | Viewed by 859 | 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)

Innovative Analytical Strategies Based on Mass Spectrometry in Food Analysis

edited by

Lucia Bartella

submission deadline 31 Dec 2025 | 1 articles | Viewed by 795 | Submission Open

Keywords: analytical methods; mass spectrometry; chromatography; bioactive compounds; contaminants; targeted analysis; untargeted analysis; food; vegetables; beverages

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

Separation Technology in Chemical Engineering

edited by Ming Xia

submission deadline 31 Dec 2025 | Viewed by 339 | Submission Open

Keywords: high-COD organic waste water; pre-treatment; unit operation; energy-efficient

(This special issue belongs to the Section Environmental Separations)

Advanced Treatment Technologies for Emerging Contaminant Control and Resource Utilization

edited by

Rui Qin

and

Ying Zhang

submission deadline 31 Dec 2025 | Viewed by 209 | Submission Open

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

(This special issue belongs to the Section Environmental Separations)

Novel Green Solvents for the Separation and Purification of Valuable Natural Ingredients

edited by

Liangliang Liu

submission deadline 10 Jan 2026 | 2 articles | Viewed by 3697 | Submission Open

Keywords: ionic liquids; deep eutectic solvents; liquid– liquid separation; separation and purification; natural materials

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

Separation Technology for Resource Utilization and Recovery

edited by

Hao Li

submission deadline 10 Jan 2026 | 1 articles | Viewed by 2633 | 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)

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 Jan 2026 | 1 articles | Viewed by 975 | 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)

Innovative Separation Techniques for Sustainable Recycling of Solid Waste

edited by

Yuanpeng Fu

and Zhen Shang

submission deadline 10 Jan 2026 | 1 articles | Viewed by 871 | 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, Purification and Functional Substances of Natural Products and Plants

edited by

Xiumei Li

submission deadline 10 Jan 2026 | 1 articles | Viewed by 328 | 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)

Recent Advances in Lithium Extraction

edited by Shiai Xu and Qiuyan Bi

submission deadline 10 Jan 2026 | Viewed by 80 | Submission Open

Keywords: lithium; extraction; adsorption; membrane separation; salt lake; seawater; separation; purification

(This special issue belongs to the Section Purification Technology)

Chromatography/Mass Spectrometry for the Determination of Food Authenticity and Food Analysis

edited by

Andreas Breidbach

submission deadline 15 Jan 2026 | 4 articles | Viewed by 10461 | Submission Open

Keywords: liquid chromatography; gas chromatography; mass spectrometry; adulteration; food fraud; multi variate analysis; authentication; high resolution MS

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

Development of Materials for Separation and Analysis Applications

edited by

Israel S. Ibarra

submission deadline 20 Jan 2026 | 3 articles | Viewed by 4801 | Submission Open

Keywords: material chemistry; separation science; polymers; analytical techniques; sample treatment; food and environmental samples

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

Advanced Polymer Materials for Membrane Separation

edited by Zhisheng Fu and

Chuanjie Fang

submission deadline 20 Jan 2026 | Viewed by 331 | Submission Open

Keywords: polymer; membrane separation technology; energy conservation; water resource; environment protection; human health; gas separation; water treatment; organic solvent separation; ion exchange/transport; two-dimensional polymer nanosheets; mixed matrix membranes; polymer metal– organic framework nanoparticles; organic solvent separation membranes; porous organic polymers

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

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

edited by

Rossella Barone

and Jennifer Pascali

submission deadline 20 Jan 2026 | Viewed by 97 | Submission Open

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

(This special issue belongs to the Section Chromatographic Separations)

Advanced Membrane Separation Technology for Complex Water/Wastewater Treatment

edited by Lin Shi and Fang Li

submission deadline 20 Jan 2026 | Viewed by 88 | Submission Open

Keywords: membrane separation; water; wastewater; resource recovery; fouling; scaling; emerging contaminants; process modeling

(This special issue belongs to the Section Purification Technology)

Adsorption Methods for Environmental Purification

edited by

Souad El Hajjaji

and Najoua Labjar

submission deadline 10 Feb 2026 | 1 articles | Viewed by 1411 | Submission Open

Keywords: adsorption; pollutant removal; eco-friendly materials; nanostructured materials; adsorption mechanisms; kinetics

(This special issue belongs to the Section Environmental Separations)

Sustainable and Intelligent Process Control of Pollutant Separation and Purification

edited by Nuan Yang and

Bing Yang

submission deadline 10 Feb 2026 | 1 articles | Viewed by 1066 | 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 10 Feb 2026 | 1 articles | Viewed by 774 | 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

Application of Chromatography in Bioactive Compound Analysis

edited by

Milan N. Mitić

, Vesna Stankov-Jovanovic and Jelena S. Nikolić

submission deadline 10 Feb 2026 | 1 articles | Viewed by 392 | 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)

Materials from Biomass and Waste for Adsorption Applications

edited by

Marija M. Vukčević

submission deadline 15 Feb 2026 | 5 articles | Viewed by 10021 | 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)

Advanced Materials for Heavy Metal Adsorption in Wastewater Treatment

edited by Jiahui Zhu and Huiquan Gu

submission deadline 20 Feb 2026 | Viewed by 125 | Submission Open

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

(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 20 Feb 2026 | Viewed by 66 | 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)

Separation Technology for Metal Extraction and Removal

edited by Minhua Su, Changzhong Liao and Jinfeng Tang

submission deadline 10 Mar 2026 | 5 articles | Viewed by 7710 | Submission Open

Keywords: metal extraction; toxic metal/nuclides removal; waste-to-resources; water purification; process development; material development and application

(This special issue belongs to the Section Purification Technology)

Recent Advances in Gas Separation and Purification

edited by

Xiong Yang

submission deadline 10 Mar 2026 | 3 articles | Viewed by 3577 | Submission Open

Keywords: adsorption; absorption; membrane; catalysis; gas separation; gas purification; zeolite; active carbon; catalyst; PSA; TSA

(This special issue belongs to the Section Separation Engineering)

Advances in Photocatalysis for Environmental Pollutant Removal

edited by

Feigao Xu

submission deadline 10 Mar 2026 | 1 articles | Viewed by 989 | Submission Open

Keywords: photocatalysts; semiconductors; microstructure regulation; environmental pollutants; degradation; Fenton

(This special issue belongs to the Section Environmental Separations)

Efficient Extraction, Separation and Purification of Critical Metal Resources

edited by Meng Li, Ying Zhang,

Zepeng Lv

, Fanfan Zhang and Yun Liu

submission deadline 10 Mar 2026 | 1 articles | Viewed by 891 | Submission Open

Keywords: critical metals; extraction; separation; purification; resource recycling; carbon reduction

Current Status and Prospects of Environmentally Friendly Sludge Dewatering, Solidification and Stabilization Technology

edited by

Boran Wu

, Binqi Rao and

Houfeng Wang

submission deadline 10 Mar 2026 | 1 articles | Viewed by 757 | Submission Open

Keywords: sewage sludge; hazardous waste; dewatering; solidification; stabilization

(This special issue belongs to the Section Separation Engineering)

Advanced Separation Media and Technologies for Biomolecules

edited by

Jianbo Qu

submission deadline 10 Mar 2026 | Viewed by 113 | 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 Mar 2026 | Viewed by 16 | 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)

Separation and Remediation of Environmental Pollutants Using Functional Materials

edited by Weichuan Qiao and

Ming Zhang

submission deadline 15 Mar 2026 | Viewed by 117 | Submission Open

Keywords: catalytic oxidation; catalytic reduction; purification; degradation; functional materials

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

Sustainable Biological Removal and Separation Processes in Wastewater Treatment

edited by

Xin Zhou

Shouqing Ni

and Guoqiang Liu

submission deadline 20 Mar 2026 | 2 articles | Viewed by 1707 | Submission Open

Keywords: wastewater treatment and reclamation; biological nutrient removal; separation and purification; emerging pollutant removal; carbon footprint mitigation; resource recovery

(This special issue belongs to the Section Environmental Separations)

Green Extraction Techniques for Bioactive Products from Natural Sources

edited by Katja Zocher, Nadia Boussetta and Christian Gusbeth

submission deadline 20 Mar 2026 | 1 articles | Viewed by 459 | Submission Open

Keywords: extraction; disruption; cell wall; solvent-free; sustainability; bioeconomy; natural products; metabolites; physical methods; microorganisms

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

Recognition Materials and Separation Applications

edited by Shucheng Liu

submission deadline 20 Mar 2026 | 1 articles | Viewed by 333 | Submission Open

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

(This special issue belongs to the Section Separation Engineering)

Recent Developments in Chemical Analysis of Bioactive Constituents of Plants and Plant Extracts

edited by

Constantinos Tsiafoulis

submission deadline 20 Mar 2026 | Viewed by 266 | Submission Open

Keywords: plant extract; bioactive constituents; food chemistry; method development; magnetic resonance spectroscopy; mass spectrometry; natural products

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

Removal of Emerging Pollutants from the Environmental Matrices

edited by

Waldemar Studziński

and

Maciej Przybyłek

submission deadline 20 Mar 2026 | Viewed by 256 | Submission Open

Keywords: emerging pollutants (EPs); transformation products; wastewater treatment; micropollutants; toxicity; environmental protection; removal; sorption; separation

(This special issue belongs to the Section Environmental Separations)

Research on Novel Separation Media and Separation/Analysis Technologies

edited by Qiongwei Yu and

Di Chen

submission deadline 20 Mar 2026 | Viewed by 148 | 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)

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

edited by

Jiaming Zhang

submission deadline 20 Mar 2026 | Viewed by 138 | 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)

Advanced Separation Membranes in Environmental and Energy Fields

edited by

Asad Asad

and

Pooria Karami

submission deadline 20 Mar 2026 | Viewed by 67 | Submission Open

Keywords: membrane separation; advanced membrane materials; surface modification; membrane fabrication; wastewater treatment; hybrid membrane systems; membrane characterization

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

Extraction and Characterization of Food Components

edited by

Bárbara Elisabeth Teixeira Costa

submission deadline 31 Mar 2026 | 3 articles | Viewed by 4080 | 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)

Recent Advances in Rare Earth Separation and Extraction

edited by

Junlian Wang

and Na Sui

submission deadline 31 Mar 2026 | 3 articles | Viewed by 2833 | 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)

Novel Solvents and Methods in Distillation Process

edited by Qunsheng Li

submission deadline 31 Mar 2026 | 2 articles | Viewed by 1296 | 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)

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

edited by

Živoslav Lj. Tešić

Branka Ivković

and

Milica Kalaba

submission deadline 31 Mar 2026 | Viewed by 158 | Submission Open

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

Selected Papers from the 1st International Online Conference on Separations (IOCS2025)

edited by

Grzegorz Boczkaj

submission deadline 31 Mar 2026 | Viewed by 150 | Submission Open

Keywords: green sample preparation; green solvents; chromatographic analysis; liquid chromatography; separation engineering; supercritical fluid; water treatment; resource recovery; membrane; adsorption

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

edited by

Junzhuo Cai

submission deadline 4 Apr 2026 | Viewed by 106 | 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)

Novel Solvents and Methods for Extraction of Chemicals

edited by Silvia Fraterrigo Garofalo and Giuseppe Pipitone

submission deadline 10 Apr 2026 | 4 articles | Viewed by 6530 | Submission Open

Keywords: sustainable extraction; chemical separation; innovative solvents; environmental sustainability; advanced extraction methods

(This special issue belongs to the Section Separation Engineering)

Research Progress of Gas–Solid Fluidized Dry Separation

edited by Chenyang Zhou

submission deadline 10 Apr 2026 | 3 articles | Viewed by 3568 | Submission Open

Keywords: gas-solid fluidized bed; bubble behavior; gas– solid fluidization simulation; dry coal separation; two-phase theory; bed density stability

(This special issue belongs to the Section Separation Engineering)

Sample Preparation and Chromatographic Analysis of Environmental Samples

edited by Rosangela Elliani and

Antonio Tagarelli

submission deadline 10 Apr 2026 | 3 articles | Viewed by 3487 | 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)

Design and Preparation of Environmental Functional Materials for Pollutant Removal

edited by Yujun Zhou and Jianfei Li

submission deadline 10 Apr 2026 | 1 articles | Viewed by 2350 | Submission Open

Keywords: wastewater treatment; membrane separation; electrochemical technology; adsorption; resource recovery; electrodes and reactor design; wastewater treatment

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

Removal of Environmental Pollutants and Bioremediation Strategies

edited by

Xinlin Zhao

and

Shuaishuai Gao

submission deadline 10 Apr 2026 | 1 articles | Viewed by 428 | Submission Open

Keywords: environmental pollutants; pollutant fate and transport; contaminant degradation; microbial remediation; phytoremediation; heavy metal; organic pollutant; bioremediation; eco-toxicological risk assessment

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