Emmanuel. C. Ngerem, Isaac A. Sanusi, Tatenda Dalu and Terence N. Suinyuy
{"title":"Sustainable acid mine drainage wastewater remediation: a comprehensive review and bibliometric analysis","authors":"Emmanuel. C. Ngerem, Isaac A. Sanusi, Tatenda Dalu and Terence N. Suinyuy","doi":"10.1039/D5VA00266D","DOIUrl":"https://doi.org/10.1039/D5VA00266D","url":null,"abstract":"<p >Global wastewater generation is over 500 million gallons per day. Presently, these wastewaters, especially acid mine drainage (AMD), are underutilized resources with the potential for utilizing their chemical fractions and water components in economically and environmentally friendly processes, such as irrigation and energy generation. The common traditional method of AMD management is its environmentally unfriendly disposal, which often results in environmental pollution. Therefore, in this review, a quantitative, qualitative, bibliometric and systematic approach to examining experimental and peer-reviewed articles on AMD wastewater generation, properties, common pollutants, and treatment methods was conducted. Moreover, this review assesses the present remediation techniques implemented in AMD management. Finally, the most current challenges and future outlook on AMD treatment are highlighted, and valuable insights as well as recommendations are provided for actions that need to be taken to improve present AMD wastewater management, treatment, reutilization, and resource sustainability efforts.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 3","pages":" 681-710"},"PeriodicalIF":4.4,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/va/d5va00266d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alex J. Kosanovich, Omar Jalife, Yasmin N. Srivastava, Yi Fan and Keith Steelman
{"title":"Performance of hydrophilic polyols in the formation of polyurethane based controlled release fertilizer coatings","authors":"Alex J. Kosanovich, Omar Jalife, Yasmin N. Srivastava, Yi Fan and Keith Steelman","doi":"10.1039/D5VA00459D","DOIUrl":"https://doi.org/10.1039/D5VA00459D","url":null,"abstract":"<p >A series of controlled-release coatings were developed for granular urea (46-0-0) using a layer-by-layer polyurethane system composed of polyether polyol blends, polymeric methylene diphenyldiisocyanate (pMDI), and a wax additive. A coating formulation utilizing a hydrophobic poly(propylene oxide) triol (P700) served as a baseline for release performance. Surprisingly, hydrophilic poly(ethylene oxide)-based diols and triols, when blended with approximately 20% glycerol, yielded coatings with improved crosslink density and moderated curing kinetics. Notably, glycerol inclusion did not enhance P700 performance, but its combination with poly(ethylene oxide)-based diol resulted in a synergistic improvement in release control for the coating formulations. These hydrophilic blended systems not only achieved excellent controlled-release behavior but also outperformed the hydrophobic P700-based coatings. This study demonstrates that hydrophilic polyols, when properly formulated, can rival or exceed the performance of traditional hydrophobic systems, offering new design strategies for environmentally responsive and tunable nutrient release coatings.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 3","pages":" 878-884"},"PeriodicalIF":4.4,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/va/d5va00459d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Richard Macedo de Oliveira, Dorthe Dahl-Jensen and Feiyue Wang
{"title":"Investigation of Zn-, Pb-, and Cd-containing nanoparticles in Canadian urban and Arctic environments: a comprehensive study utilizing single particle inductively coupled plasma mass spectrometry for characterization","authors":"Richard Macedo de Oliveira, Dorthe Dahl-Jensen and Feiyue Wang","doi":"10.1039/D5VA00258C","DOIUrl":"https://doi.org/10.1039/D5VA00258C","url":null,"abstract":"<p >Measuring metal-containing nanoparticles (NPs) in the environment requires sensitive analytical techniques capable of determining the concentration and elemental composition, particle mass and size. Here we report the characterization of Zn-, Pb-, and Cd-containing NPs by single-particle inductively coupled plasma mass spectrometry (spICP-MS) in snow samples collected from two vastly different sites in Canada: an urban environment from Winnipeg and a remote location at the Müller Ice Cap in Axel Heiberg Island of the Canadian Arctic. Average mass concentrations of Zn-, Pb-, and Cd-containing NPs in fresh snow samples from the urban location ranged from 0.7–149, 1.5–296 and 0.2–1.6 ng L<small><sup>−1</sup></small>, respectively. These concentrations accounted for 0.05–17% of total dissolved (operationally defined as the fraction filtered by a 0.45 µm membrane) concentrations of Zn, 0.2–31.5% of Pb, and 0.05–2.2% of Cd for Cd in the urban snow samples. Mass concentrations for Zn- and Pb-containing NPs in snowpits at depths of 10 to 60 cm from the Müller Ice Cap ranged from 10.0 to 297 ng L<small><sup>−1</sup></small> (or 2.4–28.8% of the total concentration) for Zn and 0.5 to 2.9 ng L<small><sup>−1</sup></small> (or 0.9–4.0% of the total concentration) for Pb. Cd-containing NPs were not detectable in the Müller Ice Cap snowpit. A contrary characteristic in the average equivalent diameter for Zn- and Pb-containing NPs was observed in Winnipeg and Müller Ice Cap snow. The average equivalent diameter of Zn-containing NPs in the urban snow (78.5–116.4 nm) was smaller than that from the High Arctic site, whereas the average equivalent diameter of Pb-NPs in the urban snow was 4.8-fold larger than in the High Arctic snow. Additionally, analysis of Pb isotopic ratios indicated that anthropogenic aerosols in the urban snow predominantly originated from North America, primarily <em>via</em> vehicular traffic and various industrial sources. Conversely, aerosols in the Arctic snow were derived from a combination of natural and anthropogenic sources, notably from Asia and North America.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 3","pages":" 853-865"},"PeriodicalIF":4.4,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/va/d5va00258c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Padmanabhan Jagannathan Prajesh, Kaliaperumal Ragunath and Suresh Neethirajan
{"title":"Satellite remote sensing and artificial intelligence for livestock greenhouse gas benchmarking: measurement, attribution, and verification challenges","authors":"Padmanabhan Jagannathan Prajesh, Kaliaperumal Ragunath and Suresh Neethirajan","doi":"10.1039/D5VA00425J","DOIUrl":"https://doi.org/10.1039/D5VA00425J","url":null,"abstract":"<p >Livestock agriculture contributes 14.5% of global anthropogenic greenhouse gas (GHG) emissions, yet current monitoring approaches carry 30–50% uncertainty, limiting credible mitigation assessment and carbon-market verification. This review synthesizes recent advances in satellite remote sensing and artificial intelligence (AI) for benchmarking methane (CH<small><sub>4</sub></small>), carbon dioxide (CO<small><sub>2</sub></small>), and nitrous oxide (N<small><sub>2</sub></small>O) emissions from livestock systems. Drawing on an 80-study PRISMA synthesis (2019–2025), we evaluate detection capabilities, retrieval uncertainties, and algorithmic limitations that constrain operational deployment. Medium-resolution sensors such as TROPOMI enable regional CH<small><sub>4</sub></small> verification but cannot resolve individual farms, while high-resolution systems like GHGSat detect only the largest emitters. AI models achieve strong accuracy for well-characterized systems but degrade substantially when applied to novel practices or sparse datasets. N<small><sub>2</sub></small>O remains effectively undetectable from space, creating persistent blind spots for 20–40% of livestock GHG footprints. We propose a hybrid multi-scale framework integrating top-down satellite observations, bottom-up process models, and AI-driven fusion to bridge facility-level management zones, satellite footprint scales, and national inventories. This integrated approach could reduce monitoring uncertainties to approximately 15–25%, enabling farm-level benchmarking and independent verification of mitigation actions. Using Canada as a case study, we outline measurement-monitoring-verification requirements necessary for transparent, policy-relevant pathways toward net-zero agriculture by 2050.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 4","pages":" 941-965"},"PeriodicalIF":4.4,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/va/d5va00425j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147621002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Saeedeh Nazari Nooghabi, Michael R. Snowdon, Amar K. Mohanty and Manjusri Misra
{"title":"Agricultural plastics in Canada and the globe: a cross-sectoral analysis of usage patterns, socioeconomic impacts, environmental risks, and policy responses","authors":"Saeedeh Nazari Nooghabi, Michael R. Snowdon, Amar K. Mohanty and Manjusri Misra","doi":"10.1039/D5VA00378D","DOIUrl":"https://doi.org/10.1039/D5VA00378D","url":null,"abstract":"<p >This study provides a comprehensive assessment of agricultural plastic use and waste management in Canada, based on Cleanfarms data (2014–2024) and international comparisons. More than 61 000 tonnes of agri-plastics are produced annually, largely in the Prairie provinces (Alberta, Saskatchewan, and Manitoba), with field crops contributing the most through bale wraps, grain bags, and trays. Recovery remains limited, with most waste landfilled or disposed of on-farm. While plastics improve efficiency and yields, they generate environmental risks including soil and water contamination, greenhouse gas emissions, and microplastic accumulation. Policy responses are fragmented: Saskatchewan and Quebec have stronger Extended Producer Responsibility (EPR) models, while education and infrastructure remain limited elsewhere. Compared with the European Union (EU), Australia, and Japan, Canada lags in recycling rates, though it performs better than the United States of America (USA) and many developing countries. The study calls for a harmonized national framework, stronger incentives, and cooperative approaches to advance a circular economy in Canadian agriculture.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 3","pages":" 659-680"},"PeriodicalIF":4.4,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/va/d5va00378d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chatarina Muryani, Pipit Wijayanti, Rita Noviani and Fitria Dewi Kartika
{"title":"Anthropogenic drivers of mangrove degradation on the north coast of Java: insights from recent studies","authors":"Chatarina Muryani, Pipit Wijayanti, Rita Noviani and Fitria Dewi Kartika","doi":"10.1039/D5VA00387C","DOIUrl":"https://doi.org/10.1039/D5VA00387C","url":null,"abstract":"<p >Mangrove ecosystems are among the most important components of coastal ecosystems, providing vital ecological, economic, and social functions. However, in the northern coastal area of Java Island, mangrove ecosystems have experienced significant degradation under pressure from anthropogenic activities. This study aims to analyze and classify the primary anthropogenic factors contributing to the degradation of mangrove ecosystems in the northern coastal area of Java, based on the latest available studies. The method employed is a scoping review, guided by the PRISMA-ScR framework. The data were collected from various national and international databases, including Scopus, DOAJ, EBSCO, Garuda, and Google Scholar, covering publications from January 2010 to April 2025. From the literature selection process, 44 scientific articles met the inclusion criteria and were analysed qualitatively. The study's results showed that mangrove degradation occurred in 18 districts/cities on the north coast of Java, with the highest levels of damage in metropolitan areas such as Jakarta, Semarang, and Surabaya. The primary factors contributing to degradation include converting land into ponds, industrial and residential development, coastal reclamation, pollution from industrial and domestic waste, illegal logging, and the expansion of coastal infrastructure. This combination of pressures has resulted in the loss of approximately 70% of Java's native mangrove forests over the last three decades. Recommended mitigation efforts include implementing sustainable aquaculture systems (silvofishery), developing buffer zones and green infrastructure, and adopting the Building with Nature (BwN) approach to nature-based restoration. Additionally, community-based ecological mangrove restoration (CBEMR) needs to be strengthened to enhance local participation. A cross-sectoral, science-based approach is key to achieving sustainable mangrove management on the north coast of Java Island.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 3","pages":" 711-725"},"PeriodicalIF":4.4,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/va/d5va00387c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jinyoung Song, In Young Kim, Seonae Hwangbo, Tae Geol Lee and June-Woo Park
{"title":"Sublethal impacts of fragmented polyethylene nanoplastics on Daphnia magna following chronic exposure","authors":"Jinyoung Song, In Young Kim, Seonae Hwangbo, Tae Geol Lee and June-Woo Park","doi":"10.1039/D5VA00329F","DOIUrl":"https://doi.org/10.1039/D5VA00329F","url":null,"abstract":"<p >Polyethylene (PE) and fragment-shaped particles are among the most prevalent polymer types and morphologies in aquatic environments. However, chronic effects of fragmented PE nanoplastics (NPs) on aquatic organisms remain largely unexplored. We evaluated the chronic toxicity (27 days) of PE NP fragments in <em>Daphnia magna</em> at 0.2 mg C L<small><sup>−1</sup></small> food level. Although <em>D. magna</em> ingested NP fragments, no significant changes in mortality were observed. However, high concentrations (10 and 100 µg mL<small><sup>−1</sup></small>) of NP fragments statistically decreased the number of offspring and reduced their body length. In addition, the proportions of males and stillborn offspring were statistically increased at 10 and 100 µg mL<small><sup>−1</sup></small> of NP fragments without changing the body length of those offspring. The population growth rate of <em>D. magna</em> exposed to NP fragments at 1, 10, and 100 µg mL<small><sup>−1</sup></small> was statistically lower than the control. It should be noted that the concentrations tested, particularly 10 and 100 µg mL<small><sup>−1</sup></small>, substantially exceed currently reported environmental NP concentrations. These findings provide chronic toxicity data for PE NP fragments that may contribute to NP risk assessment frameworks.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 3","pages":" 791-801"},"PeriodicalIF":4.4,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/va/d5va00329f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Metagenomic insights into density-driven plastic stratification in open dumpsites: implications for waste management and bioremediation","authors":"Anuja Joseph and Sudha Goel","doi":"10.1039/D5VA00288E","DOIUrl":"https://doi.org/10.1039/D5VA00288E","url":null,"abstract":"<p >Open dumpsites in developing countries constitute a critical nexus of plastic contamination and microbial ecology. However, the mechanistic interplay between polymer density-driven stratification and niche-specific microbial adaptation remains unexplored. This study presents the first integrated metagenomic investigation linking density-mediated plastic segregation to depth-stratified microbial community assembly and metabolic functionality in a tropical open dumpsite. Depth profiling revealed that low-density polyethylene dominated the layers closer to the surface, whereas polypropylene and polyethylene terephthalate were concentrated in the bottom layers. A stratification pattern was subsequently detected in adjacent soil microplastic profiles, indicating density-dependent dispersal mechanisms. Metagenomic sequencing revealed distinct microbial niches aligned with plastic layers: surface zones favoured aerobic <em>Proteobacteria</em> and <em>Actinobacteria</em>, whereas anoxic depths enriched anaerobic taxa and pathways for methane metabolism, alternative carbon fixation, and dissimilatory processes. These findings highlight plastic density as an important driver of vertical microplastic migration and indigenous microbial community structuring, informing predictive modelling of contamination risk trajectories and the design of depth-targeted bioremediation strategies using adapted native consortia. This work advances fundamental understanding of density-driven ecological structuring in anthropogenic waste systems while providing an evidence-based framework for optimizing site-specific waste stabilization and developing indigenous microbial solutions for plastic remediation in regions dependent on uncontrolled dumping.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 3","pages":" 816-828"},"PeriodicalIF":4.4,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/va/d5va00288e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yanzhe Yin, Andrew Grundstein, Deepak R. Mishra, Navid Hashemi Tonekaboni, Lakshmish Ramaswamy, John A. Miller and John Dowd
{"title":"Heat and cities: using vehicle-borne sensing to capture hyperlocal spatio–temporal urban thermal complexities","authors":"Yanzhe Yin, Andrew Grundstein, Deepak R. Mishra, Navid Hashemi Tonekaboni, Lakshmish Ramaswamy, John A. Miller and John Dowd","doi":"10.1039/D5VA00332F","DOIUrl":"https://doi.org/10.1039/D5VA00332F","url":null,"abstract":"<p >Extreme heat events are becoming a growing concern for urban residents, with increased frequency and intensity. Understanding urban heat dynamics and thermal exposure is critical for identifying and mitigating heat hazards. Most studies of urban heat dynamics use satellite-derived or weather station data that are limited in temporal and spatial resolutions. Improving urban sustainability requires new ways to capture hyperlocal ambient air temperature (AAT) information within complex, built environments. Drive-by-sensing offers great potential in capturing the spatiotemporal dynamics of urban heat. Our paper demonstrates the broader application of temporally dense hyperlocal AAT data obtained using a novel drive-by-sensing framework. Using 2 million AAT data points collected between May–September 2019, we examine the thermal complexities of a mid-sized city, including the spatio–temporal dynamics of hotspots and areas of extreme heat exposure. This high spatiotemporal dataset reveals differing heat profiles under different weather conditions and at different times of day, with temperature variations of up to 12 °C between hot and cold spots. These hotspots move around the city and were not all found near urban cores. This drive-by-sensing approach has the potential to be scaled and used by government entities to make cities more heat resilient and sustainable.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 5","pages":" 1367-1378"},"PeriodicalIF":4.4,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/va/d5va00332f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147924010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Norman Kelly, Peter Boelens, Ashak Mamhud Parvez, Sabine Kutschke, Doreen Ebert, Bradley Martin Guy, Robert Möckel, Muhammed Haseeb Aamir, Cynthia Sanchez-Garrido, Ulrike Fischer, Mohsin Sajjad, Axel D. Renno, Lucas Ott, Frank Ellinger, Ajay Bhagwan Patil and Jens Gutzmer
{"title":"Hydrometallurgical recovery of high-purity copper from waste printed circuit boards: an experimental study and life cycle assessment","authors":"Norman Kelly, Peter Boelens, Ashak Mamhud Parvez, Sabine Kutschke, Doreen Ebert, Bradley Martin Guy, Robert Möckel, Muhammed Haseeb Aamir, Cynthia Sanchez-Garrido, Ulrike Fischer, Mohsin Sajjad, Axel D. Renno, Lucas Ott, Frank Ellinger, Ajay Bhagwan Patil and Jens Gutzmer","doi":"10.1039/D5VA00348B","DOIUrl":"https://doi.org/10.1039/D5VA00348B","url":null,"abstract":"<p >Due to their complex structure and high metal content, printed circuit boards (PCBs) represent both a major challenge and opportunity for recycling. By weight, copper represents the main metallic fraction of PCBs. Thus, the selective removal and recovery of high-purity copper is crucial for efficient recycling, in addition to the extraction of minor, precious metal components, such as gold, silver, and palladium. This paper presents an integrated study of detailed characterization, process development, and the environmental impact of copper recycling from virgin PCBs using hydrometallurgical approaches – rather than the well-established pyrometallurgical route. Thorough mineral liberation analysis helped us understand specific processing and metallurgical approaches based on the accessibility of the target metal phases. Near quantitative copper leaching was achieved with H<small><sub>2</sub></small>SO<small><sub>4</sub></small>/H<small><sub>2</sub></small>O<small><sub>2</sub></small> and HNO<small><sub>3</sub></small>, whereas heterotrophic bioleaching with citric acid and polyglutamic acid resulted in <13% of copper leaching. In a two-stage process, >98% of the leached copper was selectively transferred to the organic phase by solvent extraction with a LIX 84-I-kerosene/CuSO<small><sub>4</sub></small>–H<small><sub>2</sub></small>SO<small><sub>4</sub></small> system. With the exception of Ni<small><sup>2+</sup></small>, co-extraction of further metal ions was not detected. Subsequently, up to 98% of the copper was recovered from the organic phase <em>via</em> stripping with a model electrolyte containing copper(<small>II</small>) sulfate in H<small><sub>2</sub></small>SO<small><sub>4</sub></small>. From the enriched electrolyte solutions, metallic copper with a purity of 99.64–99.84% was electrodeposited on a stainless steel cathode, with a current efficiency of 98.66–99.85%. Residual copper obtained by washing the leaching residue was recovered by cementation with an iron powder according to a stoichiometric ratio of Fe/Cu<small><sup>2+</sup></small> of 1.5 : 1. According to life cycle assessment, based on the energy and chemical consumption of the copper recycling process, the global warming potential of the tested approaches lies in the range 13.0 kg CO<small><sub>2</sub></small> eq. per (kg Cu) – 40.3 kg CO<small><sub>2</sub></small> eq. per (kg Cu). The greatest contributors to environmental impact are leaching and solvent extraction processes, which can be substantially improved by operating on a larger scale and recycling process ingredients. The proposed approach demonstrates end-to-end high-purity metal recovery with direct application to various circuit boards and copper-rich electronic components.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 3","pages":" 772-790"},"PeriodicalIF":4.4,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/va/d5va00348b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}