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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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Adsorption Process in Chemical Engineering

edited by Adrian Bonilla-Petriciolet,

Didilia Ileana Mendoza-Castillo

and Hilda Elizabeth Reynel-Ávila

submission deadline 20 Aug 2025 | 2 articles | Viewed by 6781 | Submission Open

Keywords: adsorbents; depollution; energy storage; environmental remediation; intensification; modeling; adsorption engineering; process systems engineering; sustainable separation; value-added products

Green Extraction Techniques of Bioactive Compounds from Natural Sources

edited by

Liliana Mihalcea

and

Mona Elena Popa

submission deadline 20 Aug 2025 | 2 articles | Viewed by 5762 | Submission Open

Keywords: natural sources; bioactive compounds; supercritical extraction; subcritical water extraction; chromatography; spectrometry; ultrasound-assisted extraction; microwave-assisted extraction; pressurized liquid extraction; enzyme-assisted extraction; bioeconomy

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

Application of Advanced Materials and Technologies in the Separation and Adsorption

edited by Hao Wu

submission deadline 10 Sep 2025 | 10 articles | Viewed by 11610 | Submission Open

Keywords: advanced material; technology; separation; adsorption; pollutant treatment; efficient; low energy consumption; resource utilization

(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 10 Sep 2025 | 1 articles | Viewed by 608 | 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)

Perspectives on Water Treatment and Desalination

edited by Jiapeng Liu

submission deadline 10 Sep 2025 | Viewed by 131 | Submission Open

Keywords: water treatment; desalination; separation science; chemical engineering; environmental science; energy consumption; innovative electrode material

(This special issue belongs to the Section Environmental Separations)

New Approaches to Phosphorus Pollutant Control and Phosphorus Recovery

edited by Xuejiao Tang

submission deadline 10 Sep 2025 | Viewed by 117 | Submission Open

Keywords: phosphorus resource recovery; purification; crystallization separation; catalytic decomposition; high value-added

(This special issue belongs to the Section Environmental Separations)

Green Separation and Purification Technology

edited by

Shun Yao

submission deadline 20 Sep 2025 | 6 articles | Viewed by 8103 | Submission Open

(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 Sep 2025 | Viewed by 173 | 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)

Mapping Drug Fate and Activity: Chromatographic Strategies in Drug Research

edited by

Gonçalo J. Justino

and Pedro F. Pinheiro

submission deadline 20 Sep 2025 | Viewed by 167 | Submission Open

Keywords: drug metabolism; pharmacokinetics; chromatographic techniques; bioanalysis; analytical method development; drug toxicity

(This special issue belongs to the Section Bioanalysis/Clinical Analysis)

Photoelectrocatalytic Organic Pollutant Degradation and Water Splitting

edited by Xingming Ning

submission deadline 30 Sep 2025 | Viewed by 68 | Submission Open

Keywords: interface charge transfer; organic pollutant degradation; photoelectrocatalytic; photogenerated charge carrier; charge separation; water splitting

(This special issue belongs to the Section Environmental Separations)

Research on New Technology and Equipment of Multiphase Flow Separation

edited by Chencan Du and

Yubin Wang

submission deadline 10 Oct 2025 | 4 articles | Viewed by 6688 | Submission Open

Keywords: multiphase flow; separation technology; equipment design; process intensification; fluid dynamics; computational modeling; mass transfer; sustainable processes; environmental impact

(This special issue belongs to the Section Separation Engineering)

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 Oct 2025 | 2 articles | Viewed by 1170 | 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)

Determination and Quantification of Pharmaceuticals Using Chromatography Methods

edited by

Karol Wróblewski

and

Małgorzata Szultka-Młyńska

submission deadline 10 Oct 2025 | 1 articles | Viewed by 967 | Submission Open

Keywords: chromatography; method validation; drug analysis; pharmaceutical analysis; analytical method development; pharmaceutical formulations; mass spectrometry

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

Membrane Separation Process for Water Treatment

edited by Fang Li

submission deadline 10 Oct 2025 | 1 articles | Viewed by 644 | 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)

Electrochemical Separation and Recovery Technology in Wastewater Treatment

edited by

Ran Mao

submission deadline 10 Oct 2025 | Viewed by 152 | Submission Open

Keywords: electrochemical wastewater treatment; resource recovery; electrooxidation; electroreduction; heavy metal complexes; nitrate; phosphorus; electro-Fenton

(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 Oct 2025 | Viewed by 98 | 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)

Advances in Separation and Leaching for Metal Recovery

edited by Yun Li and

Hui Xu

submission deadline 15 Oct 2025 | Viewed by 69 | Submission Open

Keywords: metal recovery; separation; leaching; efficiency; selectivity; sustainable recovery

(This special issue belongs to the Section Separation Engineering)

Solid Waste Recycling and Strategic Metal Extraction

edited by

Lihui Gao

Daoguang Teng

Shulei Li

and Chunlin He

submission deadline 20 Oct 2025 | 2 articles | Viewed by 2010 | Submission Open

Keywords: solid waste; biomass; adsorption material; wastewater treatment; strategic metal resources

(This special issue belongs to the Section Separation Engineering)

Application of Advanced Oxidation Processes (AOPs) in Wastewater Treatment

edited by Hongwei Sun

submission deadline 20 Oct 2025 | Viewed by 107 | Submission Open

Keywords: advanced oxidation processes; wastewater; catalysts; emerging pollutants; recalcitrant pollutants; cost evaluation; durability

(This special issue belongs to the Section Environmental Separations)

Separation Techniques for the Enrichment and Extraction of Rare Earth Elements

edited by Hongpeng Fan

submission deadline 20 Oct 2025 | Viewed by 105 | Submission Open

Keywords: rare earth elements (REEs); separation techniques; environmentally friendly processes; sustainability innovative approaches

(This special issue belongs to the Section Separation Engineering)

Isolation and Identification of Biologically Active Natural Compounds

edited by

Iulia Varzaru

and

Arabela Elena Untea

submission deadline 10 Nov 2025 | 5 articles | Viewed by 8946 | Submission Open

Keywords: plants; by-products; bioactive compounds; isolation methods; chromatography; antioxidant activity; antimicrobial activity; bioavailable compounds; nutraceuticals

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

Chemical and Contaminant Residue Analysis via Chromatography

edited by

Evangelia Tzanetou

and

Konstantinos M. Kasiotis

submission deadline 10 Nov 2025 | 3 articles | Viewed by 5642 | Submission Open

Keywords: liquid chromatography; gas chromatography; contaminants; residues; volatile organic compounds; mass spectrometry; food; environment; biological fluids; regulatory compliance; risk assessment

(This special issue belongs to the Section Chromatographic Separations)

Separation Techniques on a Miniaturized Scale

edited by

Fernando Lanças

and Deyber Arley Vargas Medina

submission deadline 10 Nov 2025 | 3 articles | Viewed by 5385 | Submission Open

Keywords: miniaturized sample preparation; sorbent-based microextraction; solvent-based microextraction; miniaturized instrumentation; green analytical chemistry; liquid chromatography; gas chromatography; open tubular liquid chromatography; capillary electrophoresis; microfluidic devices

(This special issue belongs to the Section Chromatographic Separations)

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

edited by Jérôme Vial and

Sylvain Antoniotti

submission deadline 10 Nov 2025 | 1 articles | Viewed by 459 | Submission Open

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

(This special issue belongs to the Section Chromatographic Separations)

Innovative Separation Techniques for Adsorption and Control of Soil and Water Contaminants

edited by Niloofar Karimian

submission deadline 10 Nov 2025 | Viewed by 205 | Submission Open

Keywords: adsorption; soil and water remediation; contaminants; heavy metals; PFAS; biochar; nanomaterials; hybrid technologies; synchrotron spectroscopy; sustainable materials; separation techniques; environmentally friendly processes; sustainability innovative approaches

(This special issue belongs to the Section Purification Technology)

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 Nov 2025 | Viewed by 129 | 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)

Advanced Separation Technology for Sludge Wastewater Treatment and Resource Utilization

edited by Bingdi Cao

submission deadline 10 Nov 2025 | Viewed by 113 | Submission Open

Keywords: sludge; solid– liquid separation; dewatering agent; extracellular polymeric substances (EPSs); electro-dewatering; coagulants

(This special issue belongs to the Section Purification Technology)

Graphene-Based Nanocomposites for Efficient Remediation of Emerging Organic Pollutants (EOPs) and Heavy Metals Contaminated Water

edited by

Fisseha Andualem Bezza

and

Evans Martin Nkhalambayausi Chirwa

submission deadline 10 Nov 2025 | Viewed by 76 | Submission Open

Keywords: nanophotocatalysts; nanoadsorbents; emerging pollutants; heavy metals; polyaromatic hydrocarbon compound; nanoparticles/composite nanoadsorbents; endocrine-disrupting chemicals; nanophotocatalysis; rGO-based metallic photocatalyst; adsorption modelling

(This special issue belongs to the Section Environmental Separations)

Removal of Volatile Organic Compounds by Adsorption/Catalytic Methods

edited by

Younes Dehmani

and

Hamou Moussout

submission deadline 15 Nov 2025 | Viewed by 622 | Submission Open

Keywords: VOC; adsorption; catalytic; natural materials; composite materials; mixtures

(This special issue belongs to the Section Separation Engineering)

New Directions in Nanostructured Hybrid Materials for Selective Separations and Catalysis

edited by

Muhammad Ahsan Iqbal

and

Valter Maurino

submission deadline 20 Nov 2025 | 1 articles | Viewed by 1197 | Submission Open

Keywords: nanostructured hybrid materials; photochemical processes; liquid/air pollutant treatments; surface functionalization; multifunctional coatings

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

Application of Nanoparticles in Selective Separation and Extraction

edited by

Alejandro Pérez-Larios

submission deadline 20 Nov 2025 | Viewed by 253 | Submission Open

Keywords: nanoparticles (NPs); selective separation; extraction; adsorption; magnetic nanoparticles (MNPs); catalytic processes; membrane technologies; environmental remediation; biotechnology; chemical engineering

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

Research on Separation Techniques for Metabolomics and Pharmacokinetics Analysis

edited by Mamunur Rashid

submission deadline 20 Nov 2025 | Viewed by 114 | 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)

Applications of Adsorbent Materials in Water and Wastewater Treatment

edited by Dragana Živojinović

submission deadline 20 Nov 2025 | Viewed by 106 | 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)

Extraction and Pharmaceutical Application of Phytochemicals

edited by

Aislan Cristina Rheder Fagundes Pascoal

and

Ana Lucia Tasca Gois Ruiz

submission deadline 20 Nov 2025 | Viewed by 93 | Submission Open

Keywords: natural products; phytochemicals; pharmacognosy; secondary metabolites; phytopharmaceuticals; phytotherapy

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

Separation Technology Applications in Sample Preparation for Environmental Analysis

edited by

Leilei Xiang

and Hongjie Sheng

submission deadline 20 Nov 2025 | Viewed by 68 | Submission Open

Keywords: environmental samples; quantitative analysis; extraction; separation technology; analytical methods; chromatography

(This special issue belongs to the Section Environmental Separations)

New and Modified Polymers for Detection and Removal of Pollutants from Water and Air

edited by Aleksandra Nastasović and

Bojana Marković

submission deadline 30 Nov 2025 | 2 articles | Viewed by 1646 | Submission Open

Keywords: polymers and composites; molecularly imprinted polymers; adsorption mechanism; thermodynamic and kinetic analysis of adsorption; quantum modeling and simulation; radionuclides; organic and inorganic pollutants; CO2 capture; gas separation

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

Advances in Novel Beneficiation Technology of Critical Minerals

edited by Jue Kou

submission deadline 30 Nov 2025 | 2 articles | Viewed by 1142 | Submission Open

Keywords: critical minerals; ore beneficiation; sensor-based ore sorting; flotation; gravity separation; magnetic separation; leaching

(This special issue belongs to the Section Environmental Separations)

Novel Functional Separation Materials for Water Treatment

edited by

Zhujian Huang

and

Xinjiang Hu

submission deadline 30 Nov 2025 | Viewed by 82 | 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)

Application of Sustainable Separation Techniques in Food Processing

edited by Beatriz Cervejeira Bolanho Barros and Huafeng Zhang

submission deadline 10 Dec 2025 | 5 articles | Viewed by 4552 | Submission Open

Keywords: sustainable process; extraction; distillation; centrifugation; filtration; decantation; bioactive compounds

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

Chromatographic Methods for Environment, Biota and Food Contaminants Analysis

edited by Melinda Haydee Kovács and Emőke Dalma Kovács

submission deadline 10 Dec 2025 | 2 articles | Viewed by 2802 | Submission Open

Keywords: Gas chromatography; Liquid chromatography; Detectors (including mass spectrometer); Extraction procedures; Purification techniques; Environmental samples; Biological samples

(This special issue belongs to the Section Chromatographic Separations)

Removal of Organic Pollutants from Aqueous Systems

edited by Li Yan

submission deadline 10 Dec 2025 | 1 articles | Viewed by 1749 | Submission Open

Keywords: organic pollutants; PFAS; adsorption; degradation; mechanisms; modeling; aquatic chemistry; interfacial processes; advanced materials; water treatment

(This special issue belongs to the Section Environmental Separations)

Mineral Processing and Separation: Research, Innovation and Production

edited by

Jiangang Ku

submission deadline 10 Dec 2025 | 1 articles | Viewed by 1378 | Submission Open

Keywords: magnetic separation; flotation; gravity separation; electric separation; separation modeling; ore purification

(This special issue belongs to the Section Separation Engineering)

Separation and Recovery Technology for Mineral Flotation and Solid Waste

edited by Yujin Sun and

Xiangning Bu

submission deadline 10 Dec 2025 | 2 articles | Viewed by 1338 | Submission Open

Keywords: separation technology; mineral flotation; coal-based waste; resource recovery; sustainable practices; environmental impact; adhesion force; novel reagents; bubble– particle; wetting

(This special issue belongs to the Section Separation Engineering)

Advances in Biochar-Mediated Nitrogen and Phosphorus Removal from Water

edited by

Chaoxu Wang

submission deadline 10 Dec 2025 | Viewed by 98 | Submission Open

Keywords: nitrogen (N); phosphorus (P); biochar; adsorption; redox catalysis; denitrification; N2O emission; wastewater treatment; eutrophication mitigation

(This special issue belongs to the Section Environmental Separations)

Development of Functionalized Porous Materials for Adsorption and Separations

edited by Thomas J. Robshaw and

Ewa Szatyłowicz

submission deadline 10 Dec 2025 | Viewed by 88 | Submission Open

Keywords: ion-exchange; adsorption; porous materials; chemical separation; water treatment; hydrometallurgy; gas capture; resource recovery

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

Recovery of Precious Metals and Metal Nanoparticles from Electronic and Industrial Waste

edited by

Dimosthenis Giokas

and

Manolis Manos

submission deadline 10 Dec 2025 | Viewed by 79 | Submission Open

Keywords: e-waste recycling; precious metal recovery; metal nanoparticle extraction; advanced separation techniques; circular economy in electronics; selective uptake of precious metals and metal nanoparticles

(This special issue belongs to the Section Purification Technology)

Recent Advances in Adsorbent for Environmental Purification

edited by

Miljana Mirković

submission deadline 10 Dec 2025 | Viewed by 45 | Submission Open

Keywords: adsorption; hybrid materials; calcium phosphates; structure; separation techniques; environmentally friendly processes; sustainability innovative approaches

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

Extraction and Isolation of Nutraceuticals from Plant Foods

edited by

Anamaria Pop

and

Gheorghe Martău

submission deadline 20 Dec 2025 | 2 articles | Viewed by 2047 | Submission Open

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

Nutraceuticals from Natural Products: Innovative Extraction Techniques and Their Phytochemical Properties

edited by

Adrian Vasile Timar

, Anca Becze and

Dorina Simedru

submission deadline 20 Dec 2025 | Viewed by 596 | Submission Open

Keywords: extraction; fortification; nutraceuticals; bioactive substances; green extraction; instrumental analysis; health benefits; biological activities

Separation Process for Sustainable Utilization of Bioresources

edited by

Hideo Maruyama

submission deadline 20 Dec 2025 | Viewed by 495 | Submission Open

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

(This special issue belongs to the Section Separation Engineering)

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