Pub Date : 2026-03-19DOI: 10.1016/j.resconrec.2026.108909
Lin Xiang, Ying Fan, Xueying Yu
{"title":"From air to water: Regulation-induced pollution substitution across media","authors":"Lin Xiang, Ying Fan, Xueying Yu","doi":"10.1016/j.resconrec.2026.108909","DOIUrl":"https://doi.org/10.1016/j.resconrec.2026.108909","url":null,"abstract":"","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"49 1","pages":""},"PeriodicalIF":13.2,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147495985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-18DOI: 10.1016/j.resconrec.2026.108911
Harald Desing, Marinella Passarella, Romain G. Billy, Alexander Griebler, Moritz Langhorst, Stefan Pogatscher, Dierk Raabe, Kirsten Remmen, Sebastian Samberger, Hauke Schlesier, Daniel B. Müller, Michael Tost
{"title":"Climate stability hinges on energy-material feedback dynamics: Aluminum perspectives","authors":"Harald Desing, Marinella Passarella, Romain G. Billy, Alexander Griebler, Moritz Langhorst, Stefan Pogatscher, Dierk Raabe, Kirsten Remmen, Sebastian Samberger, Hauke Schlesier, Daniel B. Müller, Michael Tost","doi":"10.1016/j.resconrec.2026.108911","DOIUrl":"https://doi.org/10.1016/j.resconrec.2026.108911","url":null,"abstract":"","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"270 1","pages":""},"PeriodicalIF":13.2,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147495988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-18DOI: 10.1016/j.resconrec.2026.108903
Daniel Philipp Müller, Michael Hiete
{"title":"Recycled content and recycling of electric vehicle batteries in the context of EU battery regulation: Methodological deficits and strategic approaches for sustainable battery materials","authors":"Daniel Philipp Müller, Michael Hiete","doi":"10.1016/j.resconrec.2026.108903","DOIUrl":"https://doi.org/10.1016/j.resconrec.2026.108903","url":null,"abstract":"","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"66 1","pages":""},"PeriodicalIF":13.2,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147495989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Upcycling photovoltaic waste silicon wafers into Si-based anode for lithium-ion batteries offers a promising solution to both the recycling of retired photovoltaic components and the growing demand for high-energy-density batteries driven by new energy development, but current capacity retention remain suboptimal. To address this, we leverage the intrinsic properties of photovoltaic waste silicon wafers and the ease of oxidation of their primary impurity Al to synthesize Al₂O₃-coated core-shell Si nanowires in a single step using the electrothermal shock method. By integrating Vapor-Liquid-Solid (VLS) and Oxidation-Assisted Growth (OAG) growth mechanisms, a one-step synthesis of Si nanowires and the Al2O3 coatings are achieved. The resulting Si/Al2O3 core-shell nanowires demonstrate a capacity retention of nearly 100% at 0.5 A g−1 and over 70% at 15 A g−1 both after 500 cycles. Full cell assembled with the commercial NCM811 cathode retains a capacity retention rate of 88% after 350 cycles at 0.5 C. Experimental and simulation results demonstrate that Al₂O₃ suppresses silicon expansion through its high mechanical strength and enhances lithium-ion mobility by generating oxygen vacancies as it lithiates to form LiAlO₂ during cycling. This work offers a promising approach for recycling photovoltaic waste silicon wafers into high-performance Si-based anode for lithium-ion batteries.
对于退役光伏组件的回收利用，以及新能源发展对高能量密度电池日益增长的需求，将光伏废旧硅片升级为锂离子电池的硅基负极，都是一种很有前景的解决方案，但目前的容量保持能力仍不理想。为了解决这个问题，我们利用光伏废硅片的固有特性及其主要杂质Al的易氧化性，利用电热冲击法一步合成了Al₂O₃涂层的核壳硅纳米线。通过整合气液固（VLS）和氧化辅助生长（OAG）生长机制，实现了硅纳米线和Al2O3涂层的一步合成。结果表明，经过500次循环后，Si/Al2O3核壳纳米线在0.5 a g−1下的容量保持率接近100%，在15 a g−1下的容量保持率超过70%。实验和模拟结果表明，Al₂O₃通过其高机械强度抑制硅的膨胀，并在循环过程中形成LiAlO₂，从而产生氧空位，从而提高锂离子的迁移率。这项工作为回收光伏废硅片制成高性能锂离子电池硅基阳极提供了一种有前途的方法。
{"title":"One-step conversion into Al2O3 coated Si nanowire anode from photovoltaic silicon waste wafers through electrothermal shock for excellent capacity retention","authors":"Qiushi Chen, Xuzhong Gong, Wenhui Fu, Xiaorui Wang, Junhao Liu, Zhi Wang","doi":"10.1016/j.resconrec.2026.108884","DOIUrl":"https://doi.org/10.1016/j.resconrec.2026.108884","url":null,"abstract":"Upcycling photovoltaic waste silicon wafers into Si-based anode for lithium-ion batteries offers a promising solution to both the recycling of retired photovoltaic components and the growing demand for high-energy-density batteries driven by new energy development, but current capacity retention remain suboptimal. To address this, we leverage the intrinsic properties of photovoltaic waste silicon wafers and the ease of oxidation of their primary impurity Al to synthesize Al₂O₃-coated core-shell Si nanowires in a single step using the electrothermal shock method. By integrating Vapor-Liquid-Solid (VLS) and Oxidation-Assisted Growth (OAG) growth mechanisms, a one-step synthesis of Si nanowires and the Al<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> coatings are achieved. The resulting Si/Al<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> core-shell nanowires demonstrate a capacity retention of nearly 100% at 0.5 A g<ce:sup loc=\"post\">−1</ce:sup> and over 70% at 15 A g<ce:sup loc=\"post\">−1</ce:sup> both after 500 cycles. Full cell assembled with the commercial NCM811 cathode retains a capacity retention rate of 88% after 350 cycles at 0.5 C. Experimental and simulation results demonstrate that Al₂O₃ suppresses silicon expansion through its high mechanical strength and enhances lithium-ion mobility by generating oxygen vacancies as it lithiates to form LiAlO₂ during cycling. This work offers a promising approach for recycling photovoltaic waste silicon wafers into high-performance Si-based anode for lithium-ion batteries.","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"27 1","pages":""},"PeriodicalIF":13.2,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147465199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
China’s future large-scale electrolytic green hydrogen deployment faces significant water and land constraints. Regional disparities in green hydrogen demand, electricity mix, and resource endowments lead to highly heterogeneous provincial pressures. Thus, this study quantifies water and land pressures from green hydrogen demand as feedstock and fuel in 30 provinces for 2030 under four deployment scenarios, using a nested model integrating demand forecasting and life-cycle accounting. Relative to the baseline scenario, water use may rise by up to 6-fold and land occupation by >12-fold. Polyester fiber shows the highest green hydrogen coupling potential but the greatest water and land pressures of 45.34 ton and 0.58 hectare-year per ton of product. Off-grid deployment amplifies land stress in already land-scarce eastern provinces, whereas grid-connected deployment exacerbates water stress in inherently water-scarce northwestern provinces. Multi-scale governance measures are proposed to balance China’s hydrogen transition ambitions with the constraints of water and land resource sustainability.
{"title":"Unveiling potential water and land resource pressures under the electrolytic hydrogen boom in China","authors":"Yilin Li, Jichao Fu, Mingkai Liu, Bin Chen, Xingying Lan, Chunming Xu","doi":"10.1016/j.resconrec.2026.108910","DOIUrl":"https://doi.org/10.1016/j.resconrec.2026.108910","url":null,"abstract":"China’s future large-scale electrolytic green hydrogen deployment faces significant water and land constraints. Regional disparities in green hydrogen demand, electricity mix, and resource endowments lead to highly heterogeneous provincial pressures. Thus, this study quantifies water and land pressures from green hydrogen demand as feedstock and fuel in 30 provinces for 2030 under four deployment scenarios, using a nested model integrating demand forecasting and life-cycle accounting. Relative to the baseline scenario, water use may rise by up to 6-fold and land occupation by >12-fold. Polyester fiber shows the highest green hydrogen coupling potential but the greatest water and land pressures of 45.34 ton and 0.58 hectare-year per ton of product. Off-grid deployment amplifies land stress in already land-scarce eastern provinces, whereas grid-connected deployment exacerbates water stress in inherently water-scarce northwestern provinces. Multi-scale governance measures are proposed to balance China’s hydrogen transition ambitions with the constraints of water and land resource sustainability.","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"414 1","pages":""},"PeriodicalIF":13.2,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147464764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The accelerating generation of food waste (FW) and the shortage of carbon sources in wastewater treatment pose dual challenges to sustainable urban waste management. A promising solution lies in transforming FW’s carbon-rich organics into a value-added resource. This study systematically evaluated the long-term performance of food waste hydrolysis acidification liquid (FWHAL) as a sustainable carbon source for denitrification, comparing it with commercial carbon sources (glucose and sodium acetate) in a sequencing batch reactor (SBR) under varying temperatures (10–20 °C). The assessment focused on denitrification efficiency, sludge properties, microbial community dynamics, and economic viability. Results showed that FWHAL achieved comparable denitrification efficiency, with stable nitrogen removal even at 10 °C (resulting in an average effluent nitrate nitrogen (NO₃⁻-N) concentration of 12.21–12.35 mg/L from an influent ammonium nitrogen (NH₄⁺-N) concentration of 40 mg/L). Furthermore, FWHAL had minimal impact on sludge settleability, evidenced by a significantly lower (P < 0.05) settled volume after 30 min (SV30) of 22.38% compared to glucose (27.89%) and sodium acetate (25.17%). Microbial analysis revealed that FWHAL enriched key denitrifiers, such as Dokdonella, and promoted synergistic microbial interactions. An economic assessment confirmed the viability of FWHAL, with a unit COD production cost of 0.47 USD/kg, significantly lower than the purchase cost of glucose (0.74 USD/kg) and sodium acetate (0.96 USD/kg). These findings demonstrate that FWHAL is a sustainable, cost-effective carbon source that supports the co-treatment of FW and wastewater, offering a practical strategy for integrated waste management and advancing circular economy objectives.
{"title":"Sustainable food waste valorization pathways through co-treatment with wastewater: A bench-scale study","authors":"Zhenjun Tian, Caili Du, Yanyan Jia, Zhongzhi Chen, Baoshan Xing, Shengwang Gao, Yangwei Bai, Yimei Wei, Xuezheng Huang, Lieyu Zhang","doi":"10.1016/j.resconrec.2026.108882","DOIUrl":"https://doi.org/10.1016/j.resconrec.2026.108882","url":null,"abstract":"The accelerating generation of food waste (FW) and the shortage of carbon sources in wastewater treatment pose dual challenges to sustainable urban waste management. A promising solution lies in transforming FW’s carbon-rich organics into a value-added resource. This study systematically evaluated the long-term performance of food waste hydrolysis acidification liquid (FWHAL) as a sustainable carbon source for denitrification, comparing it with commercial carbon sources (glucose and sodium acetate) in a sequencing batch reactor (SBR) under varying temperatures (10–20 °C). The assessment focused on denitrification efficiency, sludge properties, microbial community dynamics, and economic viability. Results showed that FWHAL achieved comparable denitrification efficiency, with stable nitrogen removal even at 10 °C (resulting in an average effluent nitrate nitrogen (NO₃⁻-N) concentration of 12.21–12.35 mg/L from an influent ammonium nitrogen (NH₄⁺-N) concentration of 40 mg/L). Furthermore, FWHAL had minimal impact on sludge settleability, evidenced by a significantly lower (<ce:italic>P</ce:italic> < 0.05) settled volume after 30 min (SV30) of 22.38% compared to glucose (27.89%) and sodium acetate (25.17%). Microbial analysis revealed that FWHAL enriched key denitrifiers, such as <ce:italic>Dokdonella</ce:italic>, and promoted synergistic microbial interactions. An economic assessment confirmed the viability of FWHAL, with a unit COD production cost of 0.47 USD/kg, significantly lower than the purchase cost of glucose (0.74 USD/kg) and sodium acetate (0.96 USD/kg). These findings demonstrate that FWHAL is a sustainable, cost-effective carbon source that supports the co-treatment of FW and wastewater, offering a practical strategy for integrated waste management and advancing circular economy objectives.","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"10 1","pages":""},"PeriodicalIF":13.2,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147465105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-15Epub Date: 2026-01-14DOI: 10.1016/j.resconrec.2026.108788
Xianliang Wu , Jinfa Chen , Yaoyue Su , Zhenming Zhang , Jun Wang
Microplastics (MPs) are generally considered biologically inert and do not participate in element cycling in soil because microorganisms in nature lack enzyme systems that can effectively cut off these artificially synthesized polymer chains. However, an increasing number of studies have confirmed that MPs entering the soil can interfere with the stability of the microbial community structure and affect the nutrient cycling processes driven by microorganisms in the soil, thereby affecting greenhouse gas emissions and plant growth. Our understanding concerning the effects of MPs on element cycling, enzyme activity, and microbial gene expression remains unclear. The present review focuses mainly on the effects of MPs on carbon (C), nitrogen (N), and phosphorus (P) cycling on soil and plant responses and introduces related advancements, challenges, limitations, and future directions. MPs can significantly affect soil C, N and P cycles and functional microorganisms in soil and correspondingly alter enzyme activities and gene expression related to greenhouse gas emissions (CH4 and N2O), depending on the interactions between the characteristics of the MPs themselves and the soil environment (e.g., moisture status, redox potential, and the microbial community). Despite the rapid development of life cycle assessment, carbon footprint and sustainable development goals related to MPs, this is still a challenging frontier field, reflected mainly in data gaps and standardization, indistinction of the carrier effect, and incompletion of the impact assessment model. Currently, several controversies remain concerning whether the same MPs have varying effects across different soil types; findings from short-term laboratory experiments often conflict with long-term field data, and MPs ultimately enhance or suppress plant absorption of N and P. This review proposes several valuable suggestions for future research, including long-term field experiments, multifactor interactions, molecular ecology techniques, standardized research methods, and coregulatory effects of viruses and hosts, which will narrow the knowledge gap concerning MPs-mediated element cycles in soil.
{"title":"A systematic review of the soil C, N, and P cycles mediated by microplastics: Enzyme activities, greenhouse gas emissions and plant growth","authors":"Xianliang Wu , Jinfa Chen , Yaoyue Su , Zhenming Zhang , Jun Wang","doi":"10.1016/j.resconrec.2026.108788","DOIUrl":"10.1016/j.resconrec.2026.108788","url":null,"abstract":"<div><div>Microplastics (MPs) are generally considered biologically inert and do not participate in element cycling in soil because microorganisms in nature lack enzyme systems that can effectively cut off these artificially synthesized polymer chains. However, an increasing number of studies have confirmed that MPs entering the soil can interfere with the stability of the microbial community structure and affect the nutrient cycling processes driven by microorganisms in the soil, thereby affecting greenhouse gas emissions and plant growth. Our understanding concerning the effects of MPs on element cycling, enzyme activity, and microbial gene expression remains unclear. The present review focuses mainly on the effects of MPs on carbon (C), nitrogen (N), and phosphorus (P) cycling on soil and plant responses and introduces related advancements, challenges, limitations, and future directions. MPs can significantly affect soil C, N and P cycles and functional microorganisms in soil and correspondingly alter enzyme activities and gene expression related to greenhouse gas emissions (CH<sub>4</sub> and N<sub>2</sub>O), depending on the interactions between the characteristics of the MPs themselves and the soil environment (e.g., moisture status, redox potential, and the microbial community). Despite the rapid development of life cycle assessment, carbon footprint and sustainable development goals related to MPs, this is still a challenging frontier field, reflected mainly in data gaps and standardization, indistinction of the carrier effect, and incompletion of the impact assessment model. Currently, several controversies remain concerning whether the same MPs have varying effects across different soil types; findings from short-term laboratory experiments often conflict with long-term field data, and MPs ultimately enhance or suppress plant absorption of N and P. This review proposes several valuable suggestions for future research, including long-term field experiments, multifactor interactions, molecular ecology techniques, standardized research methods, and coregulatory effects of viruses and hosts, which will narrow the knowledge gap concerning MPs-mediated element cycles in soil.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"228 ","pages":"Article 108788"},"PeriodicalIF":10.9,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-15Epub Date: 2026-01-14DOI: 10.1016/j.resconrec.2026.108786
Vorada Kosajan, Wei Pan, Yang Zhang
This study examined the potential of End-of-Life circular economy systems to reduce embodied carbon in steel modular buildings. A multicycle life cycle assessment framework integrating material flow analysis and time-specific impact factors was developed. A case study involving a typical steel module in Hong Kong showed that landfilling generated 154.9 t CO2 eq. over the period 2020–2070, whereas recycle-priority and reuse-priority scenarios achieved 123.1 t CO2 eq. and 47.2 t CO2 eq., respectively. Reusing the steel module up to ten times reduced embodied carbon by 4.1 t CO2 eq./m2. Component-level analysis revealed that architectural components could significantly contribute to embodied carbon reductions. However, decarbonisation of the upstream industry (steel, aluminium, and electricity) reduced the benefits of multiple reuses by 24.2 %. This paper provides a comprehensive and flexible framework for multiple lifecycle assessment and offers valuable insights into how steel modular construction can enhance decarbonisation through End-of-Life circular economy systems.
{"title":"Reducing embodied carbon in steel modules through end-of-life circular economy systems","authors":"Vorada Kosajan, Wei Pan, Yang Zhang","doi":"10.1016/j.resconrec.2026.108786","DOIUrl":"10.1016/j.resconrec.2026.108786","url":null,"abstract":"<div><div>This study examined the potential of End-of-Life circular economy systems to reduce embodied carbon in steel modular buildings. A multicycle life cycle assessment framework integrating material flow analysis and time-specific impact factors was developed. A case study involving a typical steel module in Hong Kong showed that landfilling generated 154.9 t CO<sub>2</sub> eq. over the period 2020–2070, whereas recycle-priority and reuse-priority scenarios achieved 123.1 t CO<sub>2</sub> eq. and 47.2 t CO<sub>2</sub> eq., respectively. Reusing the steel module up to ten times reduced embodied carbon by 4.1 t CO<sub>2</sub> eq./m<sup>2</sup>. Component-level analysis revealed that architectural components could significantly contribute to embodied carbon reductions. However, decarbonisation of the upstream industry (steel, aluminium, and electricity) reduced the benefits of multiple reuses by 24.2 %. This paper provides a comprehensive and flexible framework for multiple lifecycle assessment and offers valuable insights into how steel modular construction can enhance decarbonisation through End-of-Life circular economy systems.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"228 ","pages":"Article 108786"},"PeriodicalIF":10.9,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145962160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-15Epub Date: 2026-01-09DOI: 10.1016/j.resconrec.2026.108781
Mohammad Sagor Hosen , Heon E. Park , Mark P. Staiger
Dimensional instability remains a principal concern in extrusion-based additive manufacturing, driven by volumetric shrinkage stemming from microstructural changes, especially throughout closed-loop recycling of semicrystalline polymers such as poly(ethylene terephthalate) (PET). The present study investigates the microstructural evolution and corresponding volumetric shrinkage of modified-PET (mPET) quantifying key microstructural contents (i.e., degree of crystallinity, and mobile and rigid amorphous fractions) across 4 fused particle fabrication cycles for the first time. The results reveal proto-spherullite formation in recycled mPET microstructure and associated microstructural changes that cause progressive volumetric shrinkage. The degree of crystallinity and rigid amorphous content are found to vary as a function of the FPF cycle number. Notably, recycled mPET exhibited an increase in density from 1.23 to 1.30 g/cm³ and volumetric shrinkage from 0 to 4.8 % following 4 FPF cycles. The study observations have important implications for predicting dimensional accuracy in 3D-printed parts manufactured from both virgin and recycled semicrystalline polymers using extrusion-based additive manufacturing.
{"title":"Toward circular, value-added recycling of modified-poly(ethylene terephthalate): Microstructure and performance across multiple fused particle fabrication cycles","authors":"Mohammad Sagor Hosen , Heon E. Park , Mark P. Staiger","doi":"10.1016/j.resconrec.2026.108781","DOIUrl":"10.1016/j.resconrec.2026.108781","url":null,"abstract":"<div><div>Dimensional instability remains a principal concern in extrusion-based additive manufacturing, driven by volumetric shrinkage stemming from microstructural changes, especially throughout closed-loop recycling of semicrystalline polymers such as poly(ethylene terephthalate) (PET). The present study investigates the microstructural evolution and corresponding volumetric shrinkage of modified-PET (mPET) quantifying key microstructural contents (<em>i.e.</em>, degree of crystallinity, and mobile and rigid amorphous fractions) across 4 fused particle fabrication cycles for the first time. The results reveal proto-spherullite formation in recycled mPET microstructure and associated microstructural changes that cause progressive volumetric shrinkage. The degree of crystallinity and rigid amorphous content are found to vary as a function of the FPF cycle number. Notably, recycled mPET exhibited an increase in density from 1.23 to 1.30 g/cm³ and volumetric shrinkage from 0 to 4.8 % following 4 FPF cycles. The study observations have important implications for predicting dimensional accuracy in 3D-printed parts manufactured from both virgin and recycled semicrystalline polymers using extrusion-based additive manufacturing.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"228 ","pages":"Article 108781"},"PeriodicalIF":10.9,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-15Epub Date: 2026-01-30DOI: 10.1016/j.resconrec.2026.108813
Vijhay Krisshna Mahenthren , Gabriele Weber-Blaschke , Mark Hughes , Michael Risse
National bioeconomy strategies in Germany, Finland, and Sweden are expected to increase wood demand, putting pressure on already strained forest resources. Circularity of wood products can reduce this demand by improving resource efficiency, but barriers like uncertain availability and quality of post-consumer wood hinder implementation. This study optimizes and extends the PRecTimber model to forecast post-consumer wood quantities and qualities in Germany (revised with quality information), Finland, and Sweden. By 2050, predicted post-consumer wood volumes are 14.11 Mt in Germany, 1.64 Mt in Finland, and 2.74 Mt in Sweden, mainly from the construction sector. Our quality assessment methodology with scenario analysis (status quo S0 and improved scenarios S1–S2 with +10 and +20 percentage-point gains in key quality factors) reveals that the shares of post-consumer construction sawnwood suitable for lifespan extension and material recycling, respectively, are 25 % and 59 % under S0, 36 % and 50 % under S1, and 49 % and 38 % under S2. Leveraging these quantity and quality insights, policy reforms can support industries and technological innovation to optimize the use of post-consumer wood.
{"title":"PRecTimber 2.0: Forecasting quantitative and qualitative potentials for wood circularity in Germany, Finland, and Sweden","authors":"Vijhay Krisshna Mahenthren , Gabriele Weber-Blaschke , Mark Hughes , Michael Risse","doi":"10.1016/j.resconrec.2026.108813","DOIUrl":"10.1016/j.resconrec.2026.108813","url":null,"abstract":"<div><div>National bioeconomy strategies in Germany, Finland, and Sweden are expected to increase wood demand, putting pressure on already strained forest resources. Circularity of wood products can reduce this demand by improving resource efficiency, but barriers like uncertain availability and quality of post-consumer wood hinder implementation. This study optimizes and extends the PRecTimber model to forecast post-consumer wood quantities and qualities in Germany (revised with quality information), Finland, and Sweden. By 2050, predicted post-consumer wood volumes are 14.11 Mt in Germany, 1.64 Mt in Finland, and 2.74 Mt in Sweden, mainly from the construction sector. Our quality assessment methodology with scenario analysis (status quo S0 and improved scenarios S1–S2 with +10 and +20 percentage-point gains in key quality factors) reveals that the shares of post-consumer construction sawnwood suitable for lifespan extension and material recycling, respectively, are 25 % and 59 % under S0, 36 % and 50 % under S1, and 49 % and 38 % under S2. Leveraging these quantity and quality insights, policy reforms can support industries and technological innovation to optimize the use of post-consumer wood.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"228 ","pages":"Article 108813"},"PeriodicalIF":10.9,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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