Resources

56 pages, 3799 KB

Open AccessReview

Unlocking the Potential of Biomass Resources: A Review on Sustainable Process Design and Intensification

by Heriberto Alcocer-García, Eduardo Sánchez-Ramírez, Eduardo García-García, César Ramírez-Márquez and José María Ponce-Ortega

Resources 2025, 14(9), 143; https://doi.org/10.3390/resources14090143 - 11 Sep 2025

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Abstract

Biomass is a key renewable resource for advancing sustainable and circular energy systems. In contrast to prior reviews that predominantly emphasized well-established biomass types and conventional conversion technologies, this work offers a comparative synthesis that underscores underutilized feedstocks and emerging valorization pathways, providing [...] Read more.

Biomass is a key renewable resource for advancing sustainable and circular energy systems. In contrast to prior reviews that predominantly emphasized well-established biomass types and conventional conversion technologies, this work offers a comparative synthesis that underscores underutilized feedstocks and emerging valorization pathways, providing a strategic perspective for sustainable process development. This review critically examines the current state of high-value-added bioproducts derived from biomass, focusing on their relevance to climate mitigation and resource efficiency. It explores sustainable process design strategies that enhance the environmental and economic performance of biomass conversion. Particular attention is given to recent advances in process intensification, including novel reactor configurations and heat integration techniques. The integration of sustainability assessment tools and multi-objective optimization approaches is analyzed to support data-driven decision-making. Multi-product biorefineries are discussed as central platforms for valorizing diverse feedstocks, supported by emerging models for supply chain integration. Present limitations such as feedstock heterogeneity, infrastructure constraints, and energy coupling challenges are reviewed, along with new opportunities in digitalization, modularization, and policy support. The novelty of this work lies in its cross-sectional synthesis of technologies, methodologies, and system-level strategies, offering a unified framework to unlock the full potential of biomass as a strategic vector for sustainable process development. Full article

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21 pages, 2163 KB

Open AccessArticle

Research Progress of Coal Stacks Reducing Dust Emissions: Ecological Technology in the Example of the Karaganda Region

by Yelena Tseshkovskaya, Natalya Tsoy, Aigul Oralova, Vadim Tseshkovskiy, Marat K. Ibrayev and Alexandr Zakharov

Resources 2025, 14(9), 142; https://doi.org/10.3390/resources14090142 - 11 Sep 2025

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Abstract

Air pollution issues are relevant all over the world, especially in industrial areas. The main pollution of the atmosphere is caused by dust emissions from industry. This article discusses the issue of dust emission from the coal industry. The purpose of this research [...] Read more.

Air pollution issues are relevant all over the world, especially in industrial areas. The main pollution of the atmosphere is caused by dust emissions from industry. This article discusses the issue of dust emission from the coal industry. The purpose of this research is a comprehensive analysis and environmental assessment of the impact of coal storage processes on the environment. The study was conducted on the example of a coal deposit in the Karaganda region of the Republic of Kazakhstan. The Karaganda region is the industrial base of Kazakhstan, and is characterized more by coal industry facilities. In addition to the impact during the mining period, coal storage is also a serious problem. The problem of storing energy coals on a large scale of their extraction and consumption has a huge impact on the environment, but it is of great economic importance for the region. In this paper, practical methods of combating weathering are considered using the example of coal: small fraction—0–50 mm; large fraction—50–300 mm; oversized—more than 300 mm. Calculations of the formation of emissions, the maximum surface concentrations of pollutants from coal depots were carried out, and plots of their dispersion were constructed. When plotting the dispersion of pollutants, it was revealed that the largest concentration of substances falls on the territory of the coal deposit. According to the data obtained, a directly proportional dependence of the amount of emissions on the volume of incoming coal and the area of the base of the coal stacks is obvious; the temperature fluctuation in the stacks during the research is in the range from 21.9 to 26.1 °C. Scientifically researched anti-emission cover (AEC) on coal stacks. AEC has advantages for a specific climate (frequent winds, dryness): preservation of properties up to 90% over their service life; resistant to environmental aggressiveness and mechanical influences. This method solves two tasks: the first task is to prevent spontaneous combustion of coal stacks, and the second task is to reduce dust emissions from coal stacks. Measures have been developed to minimize the negative impact of coal stacks on the environment. Full article

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17 pages, 2091 KB

Open AccessArticle

Assessing Soil Quality in Conversion of Burned Forestlands to Rice Croplands: A Case Study in Northern Iran

by Misagh Parhizkar, Shahryar Babazadeh Jafari, Zeinab Ghasemzadeh, Pietro Denisi and Demetrio Antonio Zema

Resources 2025, 14(9), 141; https://doi.org/10.3390/resources14090141 - 10 Sep 2025

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Abstract

Conversion of burned forestlands into rice croplands is often practised to increase food production. However, this practice can lead to a severe decline in soil quality and functioning. Unfortunately, no research has previously evaluated how and to what extent physico-chemical properties and overall [...] Read more.

Conversion of burned forestlands into rice croplands is often practised to increase food production. However, this practice can lead to a severe decline in soil quality and functioning. Unfortunately, no research has previously evaluated how and to what extent physico-chemical properties and overall quality of forest soils change when converted to rice paddy fields. This study has evaluated the changes in key soil properties and Soil Quality Index (SQI) when burned forests are converted to rice croplands in Guilan Province (Northern Iran). This conversion results in noticeable worsening of soil structure (shown by the decreases in size and stability of macro-aggregates, ~50%) and reductions in organic matter (−30%) and nutrient contents (−43% of TN and −49% of P) of soil in rice paddy fields in comparison to burned forest soils. In contrast, soil salinity increased by 180% and potassium by 12%, while pH remained unchanged between forestland and rice fields. The calculation of the SQI showed that the overall quality of the soil was severely affected by this change. The main message of this study is that replacement of forest ecosystems with rice croplands should be carefully controlled, in order to avoid noticeable impacts on soil properties and theiroverall quality. In sites where this conversion has occurred, sustainable land management practices, such as moderate supply of organic amendments and fertilisers, should be implemented to mitigate soil degradation. Full article

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45 pages, 2842 KB

Open AccessReview

Bio-Based Sorbents for Marine Oil Spill Response: Advances in Modification, Circularity, and Waste Valorization

by Célia Karina Maia Cardoso, Ícaro Thiago Andrade Moreira, Antônio Fernando de Souza Queiroz, Olívia Maria Cordeiro de Oliveira and Ana Katerine de Carvalho Lima Lobato

Resources 2025, 14(9), 140; https://doi.org/10.3390/resources14090140 - 8 Sep 2025

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Abstract

Marine oil spills remain a recurring environmental concern, particularly in coastal and estuarine areas. Among the available strategies for managing spilled oil, sorbents derived from natural fibers have attracted considerable interest as viable alternatives to synthetic materials due to their biodegradability, low cost, [...] Read more.

Marine oil spills remain a recurring environmental concern, particularly in coastal and estuarine areas. Among the available strategies for managing spilled oil, sorbents derived from natural fibers have attracted considerable interest as viable alternatives to synthetic materials due to their biodegradability, low cost, and alignment with circular economy principles. This review synthesizes recent advances by connecting technical and environmental aspects with operational applications. It emphasizes structural and surface modifications of lignocellulosic fibers to enhance petroleum sorption capacity, selectivity, buoyancy, and reusability. Physical, chemical, and biological approaches are discussed, focusing on how these modifications influence sorption dynamics under realistic conditions. The review also highlights the incorporation of agricultural and industrial residues as raw materials, along with regeneration and reuse strategies that support waste valorization. However, significant gaps remain, such as the lack of studies with weathered crude oils, the limitation of larger-scale testing, and the need for standardized methods and evaluation of the final fate of exhausted biosorbents. Through the integration of technical, environmental, and operational criteria, this review provides a critical foundation for developing more efficient and circular marine oil spill response technologies. Full article

(This article belongs to the Special Issue Petroleum Waste Generation: Current and Future Trends in Management and Treatment)

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18 pages, 1074 KB

Open AccessArticle

Crop Loss Due to Soil Salinity and Agricultural Adaptations to It in the Middle East and North Africa Region

by Jeetendra Prakash Aryal, Luis Augusto Becerra Lopez-Lavalle and Ahmed H. El-Naggar

Resources 2025, 14(9), 139; https://doi.org/10.3390/resources14090139 - 31 Aug 2025

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Abstract

Using data collected from 294 farm households across Egypt, Morocco, and Tunisia, this study quantifies crop losses due to soil salinity and analyzes the key factors associated with it. Further, it analyzes the factors driving the farmers’ choice of adaptation measures against salinity. [...] Read more.

Using data collected from 294 farm households across Egypt, Morocco, and Tunisia, this study quantifies crop losses due to soil salinity and analyzes the key factors associated with it. Further, it analyzes the factors driving the farmers’ choice of adaptation measures against salinity. Almost 54% of households surveyed reported yield losses due to salinity, with a sizable portion experiencing losses above 20%. In response to salinization, farmers adopted five adaptation practices, including crop rotation, salt stress-tolerant varieties, drainage management, soil amendments, and improved irrigation practices. A generalized linear model is applied to examine the factors explaining crop loss due to salinity. Results show that a higher share of irrigated land correlates with greater salinity-related crop loss, particularly in areas with poor drainage and low water quality. Conversely, farms with good soil quality reported significantly lower losses. Crop losses due to salinity were much lower in quinoa compared to wheat. Farmers who received agricultural training or belonged to cooperatives reported lower losses. A multivariate probit model was employed to understand drivers of adaptive behaviors. The analysis shows credit access, cooperative membership, training, and resource endowments as significant predictors of adaptation choices. The results underscore the importance of expanding credit availability, strengthening farmer organizations, and investing in training for effective salinity management. Full article

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28 pages, 1263 KB

Open AccessArticle

Social Economy Organizations as Catalysts of the Green Transition: Evidence from Circular Economy, Decarbonization, and Short Food Supply Chains

by Martyna Wronka-Pośpiech and Sebastian Twaróg

Resources 2025, 14(9), 138; https://doi.org/10.3390/resources14090138 - 31 Aug 2025

Viewed by 522

Abstract

This paper examines the evolving role of social economy organisations (SEOs) in advancing sustainability and contributing to the green transition. While traditionally focused on social inclusion and local development, SEOs are increasingly integrating environmental objectives into their operations, particularly through circular economy (CE) [...] Read more.

This paper examines the evolving role of social economy organisations (SEOs) in advancing sustainability and contributing to the green transition. While traditionally focused on social inclusion and local development, SEOs are increasingly integrating environmental objectives into their operations, particularly through circular economy (CE) practices, decarbonisation strategies, and short food supply chains (SFSCs). Based on qualitative research and the analysis of 16 good practices from five European countries, the study demonstrates how SEOs create blended social and environmental value by combining economic, social, and ecological goals. The findings show that SEOs foster environmental sustainability by reducing resource consumption and carbon emissions, creating green jobs, strengthening local cooperation, and raising environmental awareness within communities. Importantly, SEOs emerge not only as service providers but also as innovators and agents of change in local ecosystems. The paper concludes with policy recommendations to enhance the role of SEOs in the green transition and identifies directions for future research, particularly regarding the measurement of their long-term environmental impact and the conditions enabling effective collaboration with public and private sector actors. Full article

(This article belongs to the Collection Management, Environment, Energy and Sustainability under a Circular Economy)

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17 pages, 1460 KB

Open AccessArticle

Life Cycle Assessment and Environmental Impact Evaluation of Demineralized Water Production at Al-Hilla Second Gas Power Plant, Iraq

by Qasim Mudher Modhehi and Haider Mohammed Zwain

Resources 2025, 14(9), 137; https://doi.org/10.3390/resources14090137 - 30 Aug 2025

Viewed by 598

Abstract

This study conducts a detailed and systematic Life Cycle Assessment (LCA) of demineralized (DEMI) water production at the Al-Hilla Second Gas Power Plant in Iraq, employing the Open LCA-ReCiPe 8 Midpoint (H) method to evaluate potential environmental impacts across 18 midpoint categories. The [...] Read more.

This study conducts a detailed and systematic Life Cycle Assessment (LCA) of demineralized (DEMI) water production at the Al-Hilla Second Gas Power Plant in Iraq, employing the Open LCA-ReCiPe 8 Midpoint (H) method to evaluate potential environmental impacts across 18 midpoint categories. The analysis focuses on the production of 1 cubic meter of high-purity water, offering a comprehensive evaluation of the environmental burdens associated with chemical usage, energy consumption, and resource depletion. The results indicate that terrestrial ecotoxicity is the most dominant impact category (20.383 kg 1,4-DCB-eq), largely driven by the extensive use of treatment chemicals such as coagulants, disinfectants, and antiscalants. Climate change follows as the second highest impact category (3.496 kg CO₂-eq), primarily due to significant electricity consumption during energy-intensive stages, particularly reverse osmosis (RO) and electro-deionization (EDI). These stages also contribute notably to fossil resource depletion (1.097 kg oil-eq) and particulate matter formation, reflecting the heavy reliance on fossil fuel-based energy in the region. Additional environmental concerns identified include human toxicity (both carcinogenic and non-carcinogenic), freshwater and marine ecotoxicity, and metal/mineral resource depletion, all of which underscore the need for improved chemical and material management throughout the treatment process. While impacts from categories such as ozone layer depletion, ionizing radiation, and eutrophication are relatively low, their cumulative effect over time remains a concern for long-term sustainability. The energy assessment reveals that the RO and EDI units alone account for over 70% of the total energy consumption, estimated at 3.143 kWh/m³. This research provides insights into minimizing environmental burdens in water treatment systems, especially in regions facing energy and water stress. Full article

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12 pages, 1997 KB

Open AccessArticle

Impact of Altitudinal Gradients on Exportable Performance, and Physical and Cup Quality of Coffee (Coffea arabica L.) Grown in Inter-Andean Valley

by Katia Choque-Quispe, Delma Diana Reynoso-Canicani, John Peter Aguirre-Landa, Henrry W. Agreda Cerna, Medalit Villegas Casaverde, Alfredo Prado Canchari, Edwin Mescco Cáceres, Lucero Quispe Chambilla, Hilka Mariela Carrión Sánchez, Yasminia Torres Flores, Henry Palomino-Rincón and David Choque-Quispe

Resources 2025, 14(9), 136; https://doi.org/10.3390/resources14090136 - 30 Aug 2025

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Abstract

Coffee production is one of the main sources of income for products from Peru’s inter-Andean valleys. However, the rugged geographical conditions offer few growing areas with different altitudes, which could lead to variations in the quality of the beans and, consequently, of the [...] Read more.

Coffee production is one of the main sources of income for products from Peru’s inter-Andean valleys. However, the rugged geographical conditions offer few growing areas with different altitudes, which could lead to variations in the quality of the beans and, consequently, of the coffee in the cup. This study aimed to evaluate the effect of altitudinal gradients on the exportable yield, and physical and cup quality of the Typica and Catimor varieties produced in the Inkawasi inter-Andean valley of Cusco, Peru. Coffee beans produced at altitudes of 1600, 1800, and 2100 m were considered, and the physical quality of parchment and green coffee was evaluated using Peruvian Technical Standards and the SCAA guidelines. Similarly, the sensory attributes of the coffee in the cup were assessed according to criteria established by the SCAA by five certified tasters. It was observed that increasing altitude considerably reduces pest attack and damage in both varieties and increases secondary damage, shrinkage, and exportable yield, which ranged from 79.12 to 81.98%. Sensory attributes ranged from “Very Good” to “Extraordinary”, allowing the Specialty Grade (>80 points) to be achieved according to SCAA standards. The PCA revealed that the Typica variety has superior sensory qualities that improve with altitude. The coffee produced in the Inkawasi valleys is well received on the international market, especially that grown above 1800 m. Its sustainable cultivation could improve the socioeconomic conditions of its inhabitants. Full article

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27 pages, 2618 KB

Open AccessArticle

Sustainability Assessment and Sustainable Management Scenario of Lake Batur in Bali, Indonesia: Insights from a Multi-Aspect Approach

by Heri Apriyanto, Warseno Warseno, Sri Handoyo Mukti, Aphang Suhendra, Taufiq Dwi Tamtomo, Hermawan Prasetya, Tukiyat Tukiyat, Hendro Wibowo, Temmy Wikaningrum, Rijal Hakiki and Janthy Trilusianthy Hidayat

Resources 2025, 14(9), 135; https://doi.org/10.3390/resources14090135 - 28 Aug 2025

Viewed by 515

Abstract

Lake Batur is part of the Batur UNESCO Global Geopark and an active caldera of Mount Batur on Bali Island, Indonesia, and it has no inlet or outlet. The current state of the lake has deteriorated due to severe environmental degradation. The lake’s [...] Read more.

Lake Batur is part of the Batur UNESCO Global Geopark and an active caldera of Mount Batur on Bali Island, Indonesia, and it has no inlet or outlet. The current state of the lake has deteriorated due to severe environmental degradation. The lake’s management will focus on the environment and other aspects planned in an integrated, sustainable lake management scenario. The research aims to develop a Key Performance Indicator instrument to determine the lake’s sustainable status. These indicators included environmental, socio-cultural, economic, institutional-management, and infrastructure-technology aspects. The method used is Multi-Aspect Sustainability Analysis to determine its sustainable status and identify the factors that have the most leverage in actions to restore Lake Batur. The primary data was collected through in-depth interviews, questionnaires, and field surveys. Respondents were stakeholders who knew the factual conditions of Lake Batur. The research results show that Lake Batur is in a state of alert or declining sustainability, even predicted to become critical if there is no significant management soon. The performance of all aspects is in the alert category (unsustainable or <50/100) except the social-cultural in the acceptable category (not yet ideal/sustainable). The management scenario of Lake Batur, at least increases to the acceptable category, includes controlling the number of floating net cages and the forest area, developing the potential of tourism and fisheries, reducing conflicts, establishing rules for lake use, increasing the role of the central government, and digitalization of lake management development, construction of water infrastructure and the use of renewable energy. Full article

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16 pages, 6840 KB

Open AccessArticle

Impact Assessment of Mining Dewatering on Vegetation Based on Satellite Image Analysis and the NDVI Index—A Case Study of a Chalk Mine

by Kamil Gromnicki and Krzysztof Chudy

Resources 2025, 14(9), 134; https://doi.org/10.3390/resources14090134 - 26 Aug 2025

Viewed by 848

Abstract

The exploitation of mineral resources often necessitates groundwater drainage, which may impact surrounding ecosystems, particularly vegetation. In this study, the effects of passive drainage in the Kornica-Popówka chalk mine in eastern Poland were analyzed using Sentinel-2 satellite images and the NDVI vegetation index. [...] Read more.

The exploitation of mineral resources often necessitates groundwater drainage, which may impact surrounding ecosystems, particularly vegetation. In this study, the effects of passive drainage in the Kornica-Popówka chalk mine in eastern Poland were analyzed using Sentinel-2 satellite images and the NDVI vegetation index. Groundwater monitoring wells were used to delineate the extent of the depression cone, representing areas of potentially altered hydrological conditions. NDVI values were analyzed across multiple time points between 2023 and 2024 to assess the condition of vegetation both inside and outside the depression cone. The results indicate no significant difference in NDVI values during the 2023–2024 study period for this specific chalk mine case between areas affected and unaffected by the depression cone, suggesting that vegetation in this region is not experiencing stress due to lowered groundwater levels. This outcome highlights the influence of other environmental factors, such as rainfall and land use, and suggests that the local geological structure allows plants to maintain sufficient access to water despite hydrological alterations. This study confirms the utility of integrating remote sensing with hydrogeological data in environmental monitoring and underlines the need for continued observation to assess long-term trends in vegetation response to mining-related groundwater changes. Full article

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25 pages, 2365 KB

Open AccessArticle

Decentralized Model for Sustainable Aviation Fuel (SAF) Production from Residual Biomass Gasification in Spain

by Carolina Santamarta Ballesteros, David Bolonio, María-Pilar Martínez-Hernando, David León, Enrique García-Franco and María-Jesús García-Martínez

Resources 2025, 14(9), 133; https://doi.org/10.3390/resources14090133 - 22 Aug 2025

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Abstract

Decarbonizing air transport is a major challenge in the global energy transition since electrification is not yet feasible. Sustainable aviation fuel (SAF) is a promising solution because it can reduce CO₂ emissions without major infrastructure changes. This study proposes a decentralized model [...] Read more.

Decarbonizing air transport is a major challenge in the global energy transition since electrification is not yet feasible. Sustainable aviation fuel (SAF) is a promising solution because it can reduce CO₂ emissions without major infrastructure changes. This study proposes a decentralized model for producing SAF in Spain through the gasification of residual lignocellulosic biomass followed by a refinement process using Fischer–Tropsch (FT) synthesis. The model uses underexploited agricultural residues such as cereal straw, vine pruning, and olive pruning, converting them into syngas in medium-scale facilities situated near biomass sources. The syngas is then transported to a central upgrading unit to produce SAF compliant with ASTM D7566 standards. The following two configurations were evaluated: one with a single gasification plant and upgrading unit and another with three gasification plants supplying one central FT facility. Energy yields, capital and operational expenditures (CAPEX and OPEX), logistic costs, and the levelized cost of fuel (LCOF) were assessed. Under a conservative scenario using one-third of the available certain types of biomass from three regions of Spain, annual SAF production could reach 517.6 million liters, with unit costs ranging from 1.63 to 1.24 EUR/L and up to 47,060 tonnes of CO₂ emissions avoided per year. The findings support the model’s technical and economic viability and its alignment with circular economy principles and climate policy goals. This approach offers a scalable and replicable pathway for decarbonizing the aviation sector using local renewable resources. Full article

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Resources, Volume 14, Issue 9 (September 2025) – 11 articles

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