Special Issues

Clean Technologies 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 Solvents and Materials for CO2 Capture
edited by Giuseppina Vanga and Claudia Bassano
submission deadline 20 May 2026 | 5 articles | Viewed by 12328 | Submission Open
Keywords: green chemistry; CO2 capture; deep eutectic solvent; ionic liquid; amines; solubility of CO2; adsorption of CO2; choline chloride
Biomass Valorization and Sustainable Biorefineries submission deadline 31 May 2026 | 3 articles | Viewed by 7160 | Submission Open
Keywords: new biorefinery models; wastewater treatment; agro-industrial by-product valorization; lignocellulosic biomass; biocatalytic processes; microbial valorization; biofuels; bioenergy; biochemicals
Application of Life Cycle Assessment (LCA) in Environmental Sustainability
edited by Andrea Mio
submission deadline 31 May 2026 | Viewed by 566 | Submission Open
Keywords: life cycle sssessment (LCA); environmental sustainability; energy technologies; industrial processes; circular economy; eco-design; carbon footprint; sustainable manufacturing; environmental impact; multi-criteria analysis
Nature-Based Solutions for Water Reuse and Contaminant Reduction
edited by , Lurdes Martinez-Landa and Montserrat Folch
submission deadline 30 Jun 2026 | 3 articles | Viewed by 13044 | Submission Open
Keywords: water reuse; sustainable technologies; water quality management; managed aquifer recharge; constructed wetlands; nutrient reduction; contaminants of emerging concern
Microalgae-Based Systems for Wastewater Treatment and Sludge Management submission deadline 30 Jun 2026 | 2 articles | Viewed by 5892 | Submission Open
Keywords: microalgae-based wastewater treatment; pollutants removal; nutrient recovery; sludge valorization; sludge management; sustainable wastewater management; microalgae– bacteria consortia; industrial and municipal effluents
Technology for Sustainable Cities, Companies and Responsible Consumers submission deadline 30 Jun 2026 | 1 articles | Viewed by 2626 | Submission Open
Keywords: sustainable city; sustainable mobility and transport; smart technologies for sustainability; Industry 5.0; smart and circular practices and technologies; zero-emission practices and technologies; carbon footprint; digital technologies for reverse logistics; sustainable company; responsible consumer
Life Cycle Thinking in the Era of Digitalization and Artificial Intelligence: Implications for Green Energy and Sustainability
edited by Dimitrios Sotirios Kourkoumpas
submission deadline 30 Jun 2026 | Viewed by 296 | Submission Open
Keywords: life cycle thinking; artificial intelligence (AI); digitalization; sustainable energy transitions; environmental impact evaluation; machine learning; digital twin technologies; circular economy; resource efficiency; predictive modelling
Selected Papers from Circular Materials Conference 2025 submission deadline 15 Jul 2026 | 3 articles | Viewed by 4068 | Submission Open
Keywords: waste management; battery recycling; direct recovery; circular materials; metal extraction; plastic recovery; textile recycling; second life; circular economy; LCA
Recovery of Bioactive Compounds from Waste and By-Products submission deadline 20 Jul 2026 | 2 articles | Viewed by 7429 | Submission Open
Keywords: bioactive compounds; waste recovery; by-products utilization; sustainable extraction techniques; circular economy; agricultural waste; industrial by-products; green technologies; nutraceuticals; environmental impact reduction
Sustainable Biofuel and Biochemical Production from Lignocellulosic Biomass
edited by Nenad Marđetko, and Mario Novak
submission deadline 31 Jul 2026 | 3 articles | Viewed by 10905 | Submission Open
Keywords: lignocellulosic biomass; biofuels; biochemicals; pretreatment methods; fermentation; circular economy; waste valorization
Innovative Advanced Oxidation and Adsorption Technologies for Contaminants of Emerging Concern in Water and Wastewater
edited by Sara P. Azerrad and
submission deadline 31 Jul 2026 | 1 articles | Viewed by 646 | Submission Open
Keywords: advanced oxidation processes (AOPs); water treatment; wastewater treatment; new catalytic materials; synthesis of nanocomposites for adsorption or oxidation; new adsorbent materials for pollutant removal; optimization strategies; hybrid treatment; coupling AOP and adsorption
Carbon Neutrality and Renewable Energy Technologies: Opportunities and Challenges
edited by , Ozge Yuksel Orhan and
submission deadline 31 Aug 2026 | 3 articles | Viewed by 7381 | Submission Open
Keywords: CO2 capture and utilisation; ionic liquids; hybrid solvents; environmental applications; post-combustion; solar energy; wind energy; bioenergy; hydropower; geothermal energy
Valorization of Agrifood By-Products and Innovation in Sustainable Biological Resources submission deadline 30 Sep 2026 | 1 articles | Viewed by 1796 | Submission Open
Keywords: circular economy; agrifood; food waste valorization; blue economy; climate-smart agriculture; food security and nutrition; agrifood by-products
Pollutant Removal from Aqueous Solutions by Adsorptive Biomaterials submission deadline 15 Oct 2026 | 6 articles | Viewed by 30491 | Submission Open
Keywords: adsorptive biomaterials; adsorption mechanisms; organic matter; heavy metals; persistent organic pollutants; characterization methods
Multidisciplinary Applications of Life Cycle Assessment (LCA) in the Development, Optimization, and Validation of Sustainable Solutions
edited by , and Ana B. López
submission deadline 31 Oct 2026 | 1 articles | Viewed by 2241 | Submission Open
Keywords: sustainability; life cycle assessment; green innovation; decision support tools; impact assessment; life cycle thinking
Sustainable Polymer Materials for Circular Economy: Recycling, Waste Valorization and Advanced Composites
edited by , and Irena Krešić
submission deadline 31 Dec 2026 | Viewed by 130 | Submission Open
Keywords: circular economy; sustainable materials; environmental impact; life cycle assessment (LCA); waste valorization; polymer recycling; biodegradable polymers; biocomposites; bio-based materials; natural fiber composites; eco-design; resource efficiency
Eco-Textiles: From Fiber Innovation to Waste Valorization
edited by , Md Abdullah Al Faruque and
submission deadline 31 Jan 2027 | Viewed by 38 | Submission Open
Keywords: fiber; textile; reuse; recycling; sustainable; bioplastic; dyeing and finishing
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