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Clean Technologies, Volume 8, Issue 3

2026 June - 36 articles

Cover Story: With abundant solar and wind resources, Chile holds high potential for green hydrogen production. This review evaluates the country’s evolving hydrogen value chain, analysing how policy instruments and legal frameworks shape deployment. While these regulatory foundations are established, actual progress has not been made toward initial targets due to techno-economic constraints. Addressing these challenges requires a deeper understanding of life-cycle greenhouse gas emissions and production performance. Additionally, the article examines Chile’s green hydrogen integration into international markets, assessing the logistical and commercial implications of global trade. Ultimately, this review synthesises policy, techno-economic realities, and market trends to identify a sustainable path toward large-scale deployment. View this paper
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Articles (36)

  • Article
  • Open Access
792 Views
24 Pages

Contribution to Environmental Sustainability Through Artificial Lightweight Aggregates Manufactured from Waste

  • Carlos Javier Cobo-Ceacero,
  • María Teresa Cotes-Palomino,
  • Lázaro Márquez-Montes,
  • Carmen Martínez-García,
  • Francisco José Troyano-Pérez and
  • Ana B. López

The valorization of industrial mining and organic wastes in construction materials constitutes a key strategy for reducing the environmental impact of the sector. In this context, the present study aims to evaluate the sustainability of innovative Ar...

(This article belongs to the Special Issue Multidisciplinary Applications of Life Cycle Assessment (LCA) in the Development, Optimization, and Validation of Sustainable Solutions)
  • Article
  • Open Access
1,818 Views
23 Pages

Highly Selective Membranes Based on Polydecylmethylsiloxane for VOC Removal: The Influence of α,ω-Diene Cross-Linker Length and Concentration

  • Stepan E. Sokolov,
  • Pavel O. Tokarev,
  • Valentina K. Grudkovskaya,
  • Ivan S. Levin,
  • Maxim G. Shalygin and
  • Evgenia A. Grushevenko

Membrane separation is an efficient approach for volatile organic compound (VOC) recovery from industrial off-gases due to its low energy consumption, compact design, and operational simplicity. Membrane-based VOC recovery critically depends on the m...

(This article belongs to the Topic Membrane Separation Technology Research, 2nd Edition)
  • Article
  • Open Access
887 Views
31 Pages

Agrivoltaics is a promising technique, especially in view of the rapid population growth associated with the expansion of cultivated areas to satisfy the food demands of the population, and the increase in solar power plants, which require considerab...

  • Article
  • Open Access
1 Citations
848 Views
32 Pages

Predictive Gate-to-Gate Life Cycle Assessment of an Early-Stage Plasma-Based Ammonia Synthesis Technology

  • Novita Wiwoho,
  • Doonyapong Wongsawaeng,
  • Phannee Saengkaew,
  • Phachirarat Sola and
  • Deni Swantomo

A predictive gate-to-gate life cycle assessment (LCA) of plasma-assisted ammonia synthesis at TRL 4 is presented according to ISO 14040/44 standards. General plasma-assisted synthesis was evaluated through a mini-review‚ sensitivity analysis&sb...

  • Review
  • Open Access
1 Citations
1,501 Views
34 Pages

Biopolymers, Bioplasticizers and Biolubricants from Waste Cooking Oil: A Systematic Review

  • Silvia D’Eusebio,
  • Pietro Caramia,
  • Antonio Caporusso,
  • Matteo Radice,
  • Antonino Biundo,
  • Isabella Pisano and
  • Gennaro Agrimi

Waste cooking oils (WCO) are large-scale residual streams from domestic and industrial food processing. Their improper disposal poses severe environmental risks, yet their integration into the oleochemical sector offers a strategic opportunity for th...

  • Article
  • Open Access
1 Citations
765 Views
18 Pages

Representative Hydrogen Sampling at Hydrogen Refuelling Stations: Interplay of Sampling Strategy and Station Parameters

  • Matz Dietrich,
  • Thomas Bacquart,
  • Abigail Morris,
  • Shirin Khaki,
  • Etienne Basset,
  • Mathilde Rizand,
  • Martine Carré,
  • Claire Blondeel,
  • Nathalie Chramosta and
  • Harry Hoster
  • + 4 authors

Taking spot samples at hydrogen refuelling stations (HRSs) and performing offline analysis in laboratories is currently the only way to achieve hydrogen fuel compliance at HRS (meet the ISO 14687:2025 standard or EN 17124:2022 in Europe). Currently,...

  • Article
  • Open Access
2 Citations
1,131 Views
24 Pages

Mesophilic Anaerobic Digestion of Municipal Sewage Sludge Under High Sodium Propionate Concentrations in Semi-Continuous Conditions: Inhibition and Microbial Community Shifts

  • Joel Awinzure Agumah,
  • Xiaojun Liu,
  • Laura André,
  • Camille Auneau,
  • Sophie Thibault,
  • Chrystelle Bureau,
  • Sabrina Guérin,
  • Vincent Rocher,
  • Carlyne Lacroix and
  • Thierry Ribeiro
  • + 4 authors

The accumulation of intermediate products, particularly volatile fatty acids (VFAs) like propionic acid (HPr) or its dissociated form, can inhibit biogas production during anaerobic digestion (AD) at low concentrations. Knowledge about the response o...

  • Article
  • Open Access
1 Citations
857 Views
34 Pages

Quantitative Indicators of the Circular Economy for Covered Pond-Type Bioreactors in Tropical Regions: Application to a Large-Scale Pig Farming System

  • Luis Angel Iturralde Carrera,
  • Daniel Fernández Navarro,
  • Yoisdel Castillo Alvarez,
  • Ariadna Yaneli Reséndiz-Jaramillo,
  • Carlos D. Constantino-Robles,
  • Leonel Díaz-Tato,
  • Miguel Angel Cruz-Pérez and
  • Juvenal Rodríguez-Reséndiz

Anaerobic digestion is a viable pathway to mitigate environmental impacts from swine manure in tropical regions while contributing to circular economy strategies. However, no standardized or integrated framework currently exists that simultaneously q...

(This article belongs to the Special Issue Innovative Approaches to Sustainable Design, Recovery, and Circular Management of Solid Waste)
  • Article
  • Open Access
1,449 Views
17 Pages

Green Synthesis of Ag-Modified ZnO Nanoparticles for Solar-Driven Photocatalytic Degradation of Organic Pollutants

  • María Teresa Maldonado-Sada,
  • Carlos Adrián Calles-Arriaga,
  • José Adalberto Castillo-Robles,
  • Jacinto Treviño-Carreon and
  • Enrique Rocha-Rangel

In this work, ZnO nanoparticles were synthesized via a plant-mediated green route using Prosopis tamaulipana extract as a reducing and stabilizing agent and subsequently modified with silver to obtain Ag-modified ZnO powders. Structural and morpholog...

(This article belongs to the Topic Sustainable Development of Clean Water and Sanitation)
  • Article
  • Open Access
1,082 Views
28 Pages

From Insulator to Conductor: Tailoring Sustainable PLA/PCL Nanocomposites with Hybrid Nanostructures Based on Carbon Nanotubes and Graphene Nanoplatelets

  • Carlos Bruno Barreto Luna,
  • Emanuel de Morais Araújo,
  • Pedro Henrique Medeiros Nicácio,
  • Elieber Barros Bezerra,
  • Débora Pereira Schmitz,
  • Bluma Guenther Soares,
  • Renate Maria Ramos Wellen and
  • Edcleide Maria Araújo

This study aims to develop sustainable conductive nanocomposites based on poly(lactic acid) (PLA)/poly(ε-caprolactone) (PCL) blends reinforced with multi-walled carbon nanotubes (MWCNT) and graphene nanoplatelets (G), focusing on their multifunctiona...

(This article belongs to the Special Issue Sustainable Polymer Materials for Circular Economy: Recycling, Waste Valorization and Advanced Composites)
  • Article
  • Open Access
1,383 Views
36 Pages

This study investigates how the hydrogen supply chain should be designed under alternative carbon tax scenarios to decarbonize heavy-duty freight transportation. A bi-objective, multi-period optimization model is developed to minimize the total daily...

(This article belongs to the Special Issue Clean Energy Technologies for Decarbonization and Environmental Sustainability)
  • Article
  • Open Access
1,468 Views
48 Pages

Ammonia, as a carbonless carrier of energy, presents considerable potential for hydrogen storage and production, as well as for power generation, thanks to its high energy density and relatively easy transportability. However, the practical adoption...

(This article belongs to the Topic Clean Energy Technologies and Assessment, 2nd Edition)
  • Article
  • Open Access
820 Views
24 Pages

Soil cadmium (Cd) pollution has emerged as one of the key environmental issues threatening the safety of agricultural products worldwide, yet clean and low-cost intervention strategies that reduce Cd accumulation in edible crops without disrupting ag...

(This article belongs to the Topic Soil/Sediment Remediation and Wastewater Treatment)
  • Article
  • Open Access
2 Citations
1,216 Views
20 Pages

The rapid expansion of the hydrogen economy has intensified the need for accessible production technologies. This study presents a comparative assessment of two next-generation hydrogen production systems showcased at the Hydrogen Expo Hamburg 2025:...

  • Article
  • Open Access
980 Views
18 Pages

Impact of Solvent Extraction on Compound Recovery and Biomethane Production Kinetics from Foodwaste Leachates

  • Ioannis Kontodimos,
  • Christos Evaggelou,
  • Nikolaos Margaritis,
  • Panagiotis Grammelis and
  • Maria A. Goula

This study proposes an integrated and more circular management approach, grounded in the principles of sustainable and green chemical processes, for the food waste leachates management, combining the assessment of biomethane production potential via...

  • Article
  • Open Access
832 Views
14 Pages

Dynamics of Hydrogen Sulfide Adsorption in Pulse Mode on Activated Carbons Produced from Plant Waste

  • Alexander A. Greish,
  • Pavel V. Sokolovskiy,
  • Elena D. Finashina,
  • Olga P. Tkachenko,
  • Timur R. Khabibullin,
  • Svetlana B. Polikarpova,
  • Vladislav Yu. Kirsanov,
  • Valeriy E. Ponomarev,
  • Artem A. Medvedev and
  • Leonid M. Kustov

The adsorption of H2S impurity in the gas flow on carbon adsorbents produced from coconut shells and sugarcane bagasse was studied. The runs were carried out in pulse mode. An original chromatographic method for determining the degree of H2S absorpti...

  • Review
  • Open Access
1 Citations
1,216 Views
35 Pages

Topics related to renewable and sustainable energy have been addressed by several scientific studies over the last few decades. Nonetheless, it is important to highlight what has already been done by the scientific community and what remains to be do...

(This article belongs to the Special Issue Clean Energy Technologies for Decarbonization and Environmental Sustainability)
  • Article
  • Open Access
941 Views
18 Pages

Process-Level Decarbonization Pathways of Purified Terephthalic Acid (PTA) Production: A Life Cycle Assessment Approach

  • Xiaoyan Le,
  • Mengmeng Shen,
  • Ziyi Liao,
  • Zhongyuan Zhu,
  • Hao Niu,
  • Kai Luo,
  • Xidong Shi and
  • Qiaoli Wang

Purified terephthalic acid (PTA) is an extremely important bulk organic raw material; it plays a central connecting role in the PX–PTA–polyester industry chain, while its significant carbon intensity remains poorly quantified. Through process-level l...

(This article belongs to the Special Issue Multidisciplinary Applications of Life Cycle Assessment (LCA) in the Development, Optimization, and Validation of Sustainable Solutions)
  • Article
  • Open Access
843 Views
29 Pages

Regional Assessment of Hydrogen Production and Use in the Intermountain West United States

  • Prashant Sharan,
  • Lucky E. Yerimah,
  • Manvendra Dubey,
  • Harshul Thakkar,
  • Mohamed Mehana,
  • Troy Semelsberger,
  • Michael Heidlage and
  • Rajinder Singh

Given the large natural gas (NG) reserves of the Intermountain West (I-WEST) region in the USA, it can emerge as a leader in hydrogen (H2) production. Currently, H2 production via steam methane reforming (SMR) of NG releases carbon dioxide (CO2) and...

  • Article
  • Open Access
1,165 Views
36 Pages

This study presents an experimental engine map investigation of waste swine oil biodiesel (WSO B100) in a single-cylinder, four-stroke variable compression ratio compression ignition engine, quantifying the coupled effects of compression ratio and lo...

  • Article
  • Open Access
1,042 Views
17 Pages

Compared with previous analytical models that mostly neglect air–lining coupled heat transfer, the proposed model innovatively introduces this mechanism and achieves a maximum error reduction of 0.5% against experimental data. The analytical so...

  • Article
  • Open Access
1 Citations
1,258 Views
18 Pages

FT-NIR-Based Sludge Moisture Prediction: Spectral Variability and Implications for On-Site Application in WWTPs

  • Irfan Basturk,
  • Ibrahim Sani Ozdemir,
  • Hande Gulcan,
  • Selda Murat Hocaoglu,
  • Recep Partal,
  • Burak Bozcelik,
  • Charuka Saamantha Meegoda,
  • Harsha Ratnaweera and
  • Zakhar Maletskyi

Accurate and rapid determination of moisture content in waste sludge is essential for optimizing dewatering processes, reducing disposal costs, and minimizing environmental impact. This study investigates the use of Fourier Transform Near-Infrared (F...

(This article belongs to the Topic Advances and Innovations in Waste Management)
  • Review
  • Open Access
3,594 Views
38 Pages

A Critical Review of Domestic Wastewater Pollutants: Exposure Pathways and Treatment Technologies

  • Igor Kogut,
  • Juliane Alberts,
  • Bianca-Michaela Wölfling,
  • Stephan Hussy,
  • Daniel Polak and
  • Maciej Szwast

Domestic wastewater is a chemically complex and highly variable mixture of pollutants generated by everyday household activities, yet its contribution to environmental contamination is still frequently underestimated and only 56% of wastewater worldw...

  • Article
  • Open Access
1,323 Views
38 Pages

Integrated Machine Learning-Based Material Quantity Estimation and Carbon Footprint Assessment for Circular Construction

  • Milena Senjak Pejić,
  • Mladenka Novaković Bežanović,
  • Mirna Radović,
  • Igor Peško and
  • Maja Petrović

The construction sector is a major consumer of raw materials and a significant source of greenhouse gas emissions, necessitating data-driven approaches to support circular economy implementation and sustainable project management. This study develops...

  • Review
  • Open Access
2 Citations
2,666 Views
28 Pages

Green Hydrogen Development in Chile: A Review of Deployment, Techno-Economics, and Global Market Integration

  • Heloísa Schneider,
  • Rolando Chamy,
  • César Valderrama,
  • Andrés Morales,
  • Fernanda Farías and
  • Sergi Vinardell

Chile is widely regarded as a key global player in green hydrogen production due to its exceptional renewable energy potential, which enables low-carbon and competitive production costs. This article provides a comprehensive review of Chile’s g...

  • Review
  • Open Access
1 Citations
2,105 Views
22 Pages

Digital Twin-Driven Intelligent Transformation of Solid Waste Treatment

  • Junnan Li,
  • Jingxin Zhang,
  • Chen Yu,
  • Shiqi Hou,
  • Peng Li,
  • Kaifeng Yu,
  • Xu Guo,
  • Fei Dou,
  • Xinglin Zhang and
  • Yiliang He

Rapid global urbanization is driving a surge in solid waste generation, while conventional treatment systems face both environmental risks and operational uncertainty. Digital twins, which enable real-time mapping between physical assets and virtual...

(This article belongs to the Special Issue Innovative Approaches to Sustainable Design, Recovery, and Circular Management of Solid Waste)
  • Review
  • Open Access
1 Citations
2,454 Views
35 Pages

Eggshell waste generated by the poultry processing industry represents a significant yet underutilized biogenic resource with substantial potential for sustainable agricultural and environmental applications. Globally, several million metric tons of...

  • Article
  • Open Access
1,392 Views
19 Pages

Cyanobacterial Biomass Residues Application as Raw and Modified Adsorbent for Propyl-Paraben in Aqueous Systems

  • Maria Avrami,
  • Christina Vasiliki Lazaratou,
  • Zacharias Frontistis,
  • Athanasia G. Tekerlekopoulou,
  • Vasilios Georgakilas and
  • Dimitris V. Vayenas

Propyl-paraben (PrP) is a common preservative found in cosmetics and pharmaceutical products. It is classified as a category 1 endocrine-disrupting compound, which highlights the importance of efficiently removing it from water during treatment proce...

(This article belongs to the Special Issue Pollutant Removal from Aqueous Solutions by Adsorptive Biomaterials)
  • Systematic Review
  • Open Access
1 Citations
2,044 Views
35 Pages

Emerging compounds in water, ranging from dyes to pharmaceuticals, negatively impact living organisms and challenge the industries responsible for their release. These pollutants exhibit chemical persistence and resistance to conventional treatment p...

(This article belongs to the Special Issue Pollutant Removal from Aqueous Solutions by Adsorptive Biomaterials)
  • Article
  • Open Access
1 Citations
1,305 Views
20 Pages

This study investigates the use of type A zeolite as a filtering material for the removal of toxic and carcinogenic compounds from cigarette smoke, which contains nicotine and other harmful substances produced by tobacco combustion. The aim is to eva...

  • Article
  • Open Access
1,882 Views
31 Pages

Maritime transport is energy-efficient but remains heavily dependent on fossil fuels. Renewable electricity-based ammonia (e-NH3) has emerged as a promising alternative, particularly through small-scale, modular production. Assessing its economic via...

(This article belongs to the Topic Clean and Low Carbon Energy, 2nd Edition)
  • Article
  • Open Access
804 Views
16 Pages

Eco-Friendly Recovery of Biocompounds from Agro-Industrial By-Products Using Non-Thermal Processing

  • Maria N. Berradre,
  • Cristina Arroqui,
  • Idoya Fernández-Pan,
  • María José Beriain,
  • Francisco C. Ibañez and
  • Paloma Vírseda

The valorization of agro-industrial by-products through sustainable extraction of bio-compounds is a key challenge within circular economy and clean-processing frameworks, as large volumes of tomato and artichoke residues are generated by the food in...

(This article belongs to the Topic Advances and Innovations in Waste Management)
  • Review
  • Open Access
2,343 Views
21 Pages

The continuous increase in atmospheric CO2 concentration exacerbates global climate change, making carbon reduction an urgent global priority. Carbonic anhydrase (CA), a highly efficient biocatalyst that converts CO2 into bicarbonate, demonstrates si...

  • Systematic Review
  • Open Access
1 Citations
3,325 Views
41 Pages

Solid Waste Disposal: A Systematic Review of Practices, Impacts and Determinants

  • Hugo Martínez Ángeles,
  • Cesar Augusto Navarro Rubio,
  • José Gabriel Ríos Moreno,
  • Margarita G. Garcia-Barajas,
  • Roberto Valentín Carrillo-Serrano,
  • Mariano Garduño Aparicio,
  • Saúl Obregón-Biosca and
  • Mario Trejo Perea

The transition toward low-carbon and circular Municipal Solid Waste (MSW) systems requires integrated evaluation approaches that consider environmental performance, technological maturity, and governance capacity. This study presents a structured, sy...

(This article belongs to the Special Issue Innovative Approaches to Sustainable Design, Recovery, and Circular Management of Solid Waste)
  • Article
  • Open Access
831 Views
24 Pages

Cunninghamella elegans Cultivation on Agro-Industrial Residues and Assessment of Immunomodulatory Properties of Bioproducts in THP-1 Macrophages

  • Eleni Dalaka,
  • Gabriel Vasilakis,
  • Markos Bilbilai,
  • Dimitris Karayannis,
  • Maria Sanida,
  • Ioannis Politis,
  • Panagiota Diamantopoulou,
  • Seraphim Papanikolaou and
  • Georgios Theodorou

Polyunsaturated fatty acids, particularly γ-linolenic acid, are recognized for their therapeutic and nutritional properties. Zygomycetes, such as Cunninghamellaelegans, represent a promising microbial platform for sustainable gamma-linolenic ac...

  • Article
  • Open Access
1,521 Views
20 Pages

Recent Advances in Sustainability Assessment of Medicinal Cannabis Cultivation and Production

  • Hamza Labjouj,
  • Loubna El Joumri,
  • Najoua Labjar,
  • Ghita Amine Benabdallah,
  • Samir Elouaham,
  • Hamid Nasrellah,
  • Brahim Bihadassen,
  • Houda Labjar,
  • El Abass El Ouardi and
  • Souad El Hajjaji

With the rapid growth of the medicinal cannabis sector, there is a growing concern regarding its environmental impact and sustainability. In recent years, life cycle assessment (LCA) studies on medicinal cannabis cultivation and processing have been...

(This article belongs to the Topic Green and Sustainable Chemical Processes)
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Clean Technol. - ISSN 2571-8797