Clean Technologies

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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Recovery of Bioactive Compounds from Waste and By-Products

edited by

Ana Dobrinčić

and

Sabino De Gisi

submission deadline 20 Oct 2025 | 2 articles | Viewed by 4690 | 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

Nature-Based Solutions for Water Reuse and Contaminant Reduction

edited by

Cristina Valhondo González

, Lurdes Martinez-Landa and Montserrat Folch

submission deadline 30 Nov 2025 | 3 articles | Viewed by 6446 | Submission Open

Keywords: water reuse; sustainable technologies; water quality management; managed aquifer recharge; constructed wetlands; nutrient reduction; contaminants of emerging concern

Biomass Valorization and Sustainable Biorefineries

edited by

Antonio Caporusso

and

Seraphim Papanikolaou

submission deadline 30 Nov 2025 | Viewed by 286 | Submission Open

Keywords: new biorefinery models; wastewater treatment; agro-industrial by-product valorization; lignocellulosic biomass; biocatalytic processes; microbial valorization; biofuels; bioenergy; biochemicals

Hydrogen Production and Carbon Capture Technologies

edited by

Sunel Kumar

and

Dingkun Yuan

submission deadline 10 Dec 2025 | Viewed by 316 | Submission Open

Keywords: hydrogen production; carbon capture; CO₂ utilization; clean energy systems; techno-economic analysis; electrolysis technologies; decarbonization strategies

Sustainable Biofuel and Biochemical Production from Lignocellulosic Biomass

edited by Nenad Marđetko,

Antonija Trontel

and Mario Novak

submission deadline 20 Dec 2025 | 3 articles | Viewed by 5709 | Submission Open

Keywords: lignocellulosic biomass; biofuels; biochemicals; pretreatment methods; fermentation; circular economy; waste valorization

Technology for Sustainable Cities, Companies and Responsible Consumers

edited by

Magdalena Wyrwicka

and

Paulina Golinska-Dawson

submission deadline 31 Dec 2025 | 1 articles | Viewed by 603 | 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

Pollutant Removal from Wastewater by Microalgae-Based Processes

edited by

Ana Sofia Oliveira

and

Catarina Amorim

submission deadline 20 Jan 2026 | Viewed by 217 | Submission Open

Keywords: microalgae-based wastewater treatment; pollutant removal; nutrient recovery; biomass valorization; sustainable wastewater management; microalgae– bacteria consortia; industrial and municipal effluents

Carbon Neutrality and Renewable Energy Technologies: Opportunities and Challenges

edited by

Shunde Yin

, Ozge Yuksel Orhan and

Paitoon Tontiwachwuthikul

submission deadline 31 Jan 2026 | 2 articles | Viewed by 2990 | Submission Open

Keywords: CO2 capture and utilisation; ionic liquids; hybrid solvents; environmental applications; post-combustion; solar energy; wind energy; bioenergy; hydropower; geothermal energy

Pollutant Removal from Aqueous Solutions by Adsorptive Biomaterials

edited by

Andreea Bondarev

and

Sonia Mihai

submission deadline 28 Feb 2026 | 5 articles | Viewed by 14311 | Submission Open

Keywords: adsorptive biomaterials; adsorption mechanisms; organic matter; heavy metals; persistent organic pollutants; characterization methods

Valorization of Agrifood By-Products and Innovation in Sustainable Biological Resources

edited by

Germana Borsetta

and

Andrea Zovi

submission deadline 28 Feb 2026 | Viewed by 705 | Submission Open

Keywords: circular economy; agrifood; food waste valorization; blue economy; climate-smart agriculture; food security and nutrition; agrifood by-products

Selected Papers from Circular Material Conference 2025

edited by

Chuan Wang

Burçak Ebin

and

Martina Petranikova

submission deadline 17 Mar 2026 | Viewed by 209 | Submission Open

Keywords: waste management; battery recycling; direct recovery; circular materials; metal extraction; plastic recovery; textile recycling; second life; circular economy; LCA

Multidisciplinary Applications of Life Cycle Assessment (LCA) in the Development, Optimization, and Validation of Sustainable Solutions

edited by

Joana Pesqueira

Inmaculada Velo-Gala

and Ana B. López

submission deadline 31 Mar 2026 | Viewed by 207 | Submission Open

Keywords: sustainability; life cycle assessment; green innovation; decision support tools; impact assessment; life cycle thinking

Innovative Approaches to Sustainable Design, Recovery, and Circular Management of Solid Waste

edited by

José Hidalgo-Crespo

and

Nicolas Maranzana

submission deadline 30 Apr 2026 | 2 articles | Viewed by 4407 | Submission Open

Keywords: eco-design; sustainable waste management; circular supply chains; digital twin technology; material flow optimization; waste-to-energy technologies; advanced recycling technologies; circular economy practices; socio-economic– environmental impacts; innovative approaches; circular business models

Green Solvents and Materials for CO₂ Capture

edited by Giuseppina Vanga and Claudia Bassano

submission deadline 20 May 2026 | 2 articles | Viewed by 4769 | Submission Open

Keywords: green chemistry; CO2 capture; deep eutectic solvent; ionic liquid; amines; solubility of CO2; adsorption of CO2; choline chloride

Application of Life Cycle Assessment (LCA) in Environmental Sustainability

edited by Andrea Mio

submission deadline 31 May 2026 | Viewed by 150 | 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

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