ACS Sustainable Resource Management最新文献_第3页

Sustainable Synthesis of a Waste-Derived Calcium Metal–Organic Framework from PET Plastic and Phosphate Mine Waste for Efficient Biodiesel Production 以PET塑料和磷矿废弃物为原料可持续合成金属钙有机骨架高效生产生物柴油

ACS Sustainable Resource Management Pub Date : 2026-09-24 Epub Date: 2026-08-13 DOI: 10.1021/acssusresmgt.6c00512

Khaireddin Boukayouht, Zouhir Balagh, Said Sair, Othmane Amadine, Yassine Taha, Yassine Ait-khouia, Samir El Hankari

{"title":"Sustainable Synthesis of a Waste-Derived Calcium Metal–Organic Framework from PET Plastic and Phosphate Mine Waste for Efficient Biodiesel Production","authors":"Khaireddin Boukayouht, Zouhir Balagh, Said Sair, Othmane Amadine, Yassine Taha, Yassine Ait-khouia, Samir El Hankari","doi":"10.1021/acssusresmgt.6c00512","DOIUrl":"https://doi.org/10.1021/acssusresmgt.6c00512","url":null,"abstract":"This study presents a sustainable strategy for the synthesis of a calcium based metal–organic framework (Ca-MOF) using phosphate mine waste rocks and polyethylene terephthalate (PET) plastic waste as alternative calcium and ligand sources, respectively. The Ca-MOF was synthesized in water under mild conditions through a simple and environmentally friendly process, achieving a high space-time yield of 790 kg·m–3·day–1. Structural and textural characterization confirmed the successful formation of a mesoporous and highly crystalline material. The waste-derived Ca-MOF was successfully applied as a heterogeneous catalyst for biodiesel production via transesterification of rapeseed oil, reaching a conversion yield of 98% under the optimized conditions (3 wt % catalyst, oil/methanol ratio of 8, 165 min, and 70 °C). In addition, the catalyst exhibited good stability and reusability over six consecutive cycles. This work demonstrates the potential of waste-derived MOFs as sustainable and efficient catalysts for renewable fuel production.","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"3 9","pages":"3255–3267"},"PeriodicalIF":0.0,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Centralized Refining of United States Nickel-Cobalt Ores: Geometallurgical Assessment and Process Modeling 美国镍钴矿的集中精炼：地质冶金评价和过程建模

ACS Sustainable Resource Management Pub Date : 2026-09-24 Epub Date: 2026-08-24 DOI: 10.1021/acssusresmgt.6c00370

Grayce Gibbs, Jihye Kim, Elizabeth Holley

{"title":"Centralized Refining of United States Nickel-Cobalt Ores: Geometallurgical Assessment and Process Modeling","authors":"Grayce Gibbs, Jihye Kim, Elizabeth Holley","doi":"10.1021/acssusresmgt.6c00370","DOIUrl":"https://doi.org/10.1021/acssusresmgt.6c00370","url":null,"abstract":"This study integrates geometallurgical analysis with process modeling to evaluate domestic nickel and cobalt refining strategies in the United States. A geometallurgical review of one active and ten proposed US projects was conducted to assess how ore and gangue mineralogy influence beneficiation behavior and concentrate production. Across the three main domestic deposit types, which are magmatic Ni–Cu–(Co–PGE) sulfide, metasedimentary Co–Cu–Au, and Mississippi Valley-type Zn–Pb(–Co–Ni), the primary ore minerals are sulfides, but gangue mineralogy varies substantially and introduces different constraints during comminution and beneficiation. These results were used to define a representative combined concentrate feedstock, evaluated using a hypothetical hydrometallurgical flowsheet modeled in SysCAD. At a projected national feed rate of 74.77 tph, a centralized refinery could theoretically process the full domestic concentrate supply, producing 28.48 tph NiSO4·6H2O and 2.93 tph CoSO4·7H2O. A reagent-focused life cycle assessment–excluding electricity–estimated emissions of 1,063 kg CO2-eq per metric ton of nickel sulfate. While a centralized refinery is technically capable of meeting domestic demand, the required scale introduces logistical and geographic challenges. These results highlight trade-offs between centralized and decentralized systems, suggesting that hybrid, regionally coordinated refining networks may be a more practical approach.","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"3 9","pages":"3130–3141"},"PeriodicalIF":0.0,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Loofah-Inspired Regenerated Aramid/EVOH Nanofiber Dual-Network Aerogel for Efficient Oil/Water Separation 丝瓜络启发再生芳纶/EVOH纳米纤维双网络气凝胶高效油/水分离

ACS Sustainable Resource Management Pub Date : 2026-09-24 Epub Date: 2026-09-03 DOI: 10.1021/acssusresmgt.5c00675

Haining You, Keyang Cui, Linghao Peng, Zhuo Chen, Tao Mei, Tao Zhao, Qinghua Zhao, Dong Wang

{"title":"Loofah-Inspired Regenerated Aramid/EVOH Nanofiber Dual-Network Aerogel for Efficient Oil/Water Separation","authors":"Haining You, Keyang Cui, Linghao Peng, Zhuo Chen, Tao Mei, Tao Zhao, Qinghua Zhao, Dong Wang","doi":"10.1021/acssusresmgt.5c00675","DOIUrl":"https://doi.org/10.1021/acssusresmgt.5c00675","url":null,"abstract":"The high-value recycling of waste aramid fibers is crucial for sustainable resource utilization. Inspired by the loofah’s porous and robust structure, this study presented a novel strategy for converting waste aramid fibers into a multifunctional dual-network aerogel for efficient oil/water separation. A regenerated aramid nanofiber (ANF) solution was combined with ethylene-vinyl alcohol copolymer (EVOH) nanofibers to form an interpenetrating network skeleton. This skeleton was subsequently modified with polydimethylsiloxane (PDMS) to create the ANF/EVOH/PDMS composite aerogel (PANF-50). The ANF framework provided high thermal stability (a maximum decomposition temperature of 567 °C), while the EVOH nanofibers enhance interfacial compatibility, increasing the compressive strength to 63.8 kPa at 70% strain. PDMS modification confers remarkable hydrophobicity (water contact angle of 132°) and oleophilicity, resulting in a high adsorption capacity for oils and organic solvents (up to 22.3 g g–1) and excellent recyclability. Structural characterization (SEM and FTIR) revealed the successful formation of a stable three-dimensional porous network and the integration of the components. Complementary XPS analysis indicates potential interfacial interactions, such as N–H···O–Si hydrogen bonding and Si–O–C covalent linkages, which were proposed to contribute to the enhanced material cohesion. The aerogel achieves rapid solvent saturation within 15 s and demonstrates high efficiency, selectivity, and cycling stability in oil/water separation. This work provided a new avenue for the sustainable valorization of waste aramid fibers, breaking the functional limitations of traditional ANF aerogels and showing great potential in environmental remediation.","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"3 9","pages":"2950–2965"},"PeriodicalIF":0.0,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Critical Valuation of Fire-Induced Losses at Municipal Solid Waste Dumpsites: An Innovative Environmentally Weighted Net Present Value Framework for Viability Assessment of Reclamation Projects 城市固体废物倾倒场火灾损失的关键评估：一个创新的环境加权净现值框架，用于填海项目可行性评估

ACS Sustainable Resource Management Pub Date : 2026-09-24 Epub Date: 2026-09-10 DOI: 10.1021/acssusresmgt.6c00173

Ajay Sundaresan Vasanthi, Sam Prakash Jayakumar, Anzila A Navaz, Thomas M Kanthappally, Joshy George, Akshay D Shende, Prathish Krishna Pillai

{"title":"Critical Valuation of Fire-Induced Losses at Municipal Solid Waste Dumpsites: An Innovative Environmentally Weighted Net Present Value Framework for Viability Assessment of Reclamation Projects","authors":"Ajay Sundaresan Vasanthi, Sam Prakash Jayakumar, Anzila A Navaz, Thomas M Kanthappally, Joshy George, Akshay D Shende, Prathish Krishna Pillai","doi":"10.1021/acssusresmgt.6c00173","DOIUrl":"https://doi.org/10.1021/acssusresmgt.6c00173","url":null,"abstract":"The study evaluates the impacts of a fire breakout incident at the Brahmapuram dumpsite in southern India on resource and energy recovery along with estimation of economic viability of reclamation. Conventional economic evaluation does not include damage costs associated with environmental impacts of dumpsites, such as recurring fires and leachate generation, and there is a lack of scientifically validated valuation frameworks for practical implementation. The present study addresses this gap through an innovative decision-support tool—environmentally weighted net present value (NPVE), developed by integrating environmental costs (E) into the traditional net present value (NPV) framework. Using site-specific post-fire breakout data and unit damage cost of pollutants adjusted for India, the environmental damage cost (EDC) at the site was estimated (15.9 to 933.8 USD/tonne of waste), and a reclamation strategy was formulated. The obtained NPVE of +8.5 million USD for the reclamation project under the new approach, vis-a-vis the conventional NPV of –9.1 million USD, justified the need for prompt intervention. The robustness of the NPVE strategy was verified through a sensitivity analysis, where the EDC was varied by ±20% and the discount rate by ±2% from their baseline values and a stress test of –10% on profits and +10% on project costs. Prompt reclamation can save 22.6 million t of recyclables and 239.1 million t of RDF (≈6.1 billion USD), across the identified 2452 dumpsites in India, and could also mitigate about 29 million t CO2-eq of landfill gas emissions, with an EDC estimated at 4.36 billion USD.","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"3 9","pages":"2985–2999"},"PeriodicalIF":0.0,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction to “Waste-to-Value Carbon Dots From Grape Biomass: The Critical Role of Purification and Proof-of-Concept for Anti-Counterfeiting” 更正“从葡萄生物量中产生的废物-价值碳点：净化和防伪概念验证的关键作用”

ACS Sustainable Resource Management Pub Date : 2026-09-24 Epub Date: 2026-08-20 DOI: 10.1021/acssusresmgt.6c00548

Gabriel C. Fonseca, Ana Gomez-Simon, Cristian Mendes-Felipe, Edurne Avellanal-Zaballa, Jorge Bañuelos, Unai Silván, Senentxu Lanceros-Méndez, Jorge Sáiz

引用次数: 0

Bio-Based and Biodegradable PVC Plasticizer Synthesized from CO2 and Castor Oil with Superior Migration Resistance 由二氧化碳和蓖麻油合成的生物基和可生物降解PVC增塑剂，具有优异的抗迁移性

ACS Sustainable Resource Management Pub Date : 2026-09-24 Epub Date: 2026-09-12 DOI: 10.1021/acssusresmgt.6c00365

Yu Ding, Yiheng Fang, Tianyi Wang, Shuangshuang Yue, Shuanjin Wang, Dongmei Han, Sheng Huang, Min Xiao, Yuezhong Meng

{"title":"Bio-Based and Biodegradable PVC Plasticizer Synthesized from CO2 and Castor Oil with Superior Migration Resistance","authors":"Yu Ding, Yiheng Fang, Tianyi Wang, Shuangshuang Yue, Shuanjin Wang, Dongmei Han, Sheng Huang, Min Xiao, Yuezhong Meng","doi":"10.1021/acssusresmgt.6c00365","DOIUrl":"https://doi.org/10.1021/acssusresmgt.6c00365","url":null,"abstract":"Poly(vinyl chloride) (PVC), a versatile plastic, requires substantial amounts of plasticizers to enhance its processability and flexibility. However, most commercial plasticizers are low-molecular-weight petrochemical derivatives that suffer from poor migration resistance and raise environmental and health concerns due to their tendency to leach. To address these issues, this study developed a series of bio-based castor oil-polycarbonate (COPPC) plasticizers from renewable feedstocks, including castor oil, carbon dioxide, and epoxides. The results indicate that the synthesized COPPC plasticizer with a molecular weight of 2.7 kg/mol delivers optimal performance. At a loading of 30 phr, it imparts excellent mechanical properties to PVC, with a tensile strength of 29.4 MPa and an elongation at break of 216.8%. Meanwhile, the plasticized PVC films exhibit high optical transparency and outstanding migration resistance in both polar and nonpolar solvents. The mass loss ranged from a minimal 0.54% in deionized water to 0.76% in acetic acid solution, demonstrating exceptional stability. This work presents a promising, migration-resistant, and sustainable alternative to conventional phthalate plasticizers.","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"3 9","pages":"3115–3129"},"PeriodicalIF":0.0,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detoxification of Ion-Adsorption Rare Earth Elements Low-Level Radioactive Residues via Mild Alkali–Carbonate: Uranium Extraction and Multi-Metal Recovery 离子吸附稀土元素低放射性残留物的弱碱性碳酸解毒：铀萃取和多金属回收

ACS Sustainable Resource Management Pub Date : 2026-09-24 Epub Date: 2026-09-12 DOI: 10.1021/acssusresmgt.6c00145

Qingqing Chang, Fanxin Xie, Siyan Mao, Lingsheng Ke, Hailin Zhang, Jie Tang, Jiachun Xiong, Qian Li, Lechang Xu, Ping Li, Tao Qi

{"title":"Detoxification of Ion-Adsorption Rare Earth Elements Low-Level Radioactive Residues via Mild Alkali–Carbonate: Uranium Extraction and Multi-Metal Recovery","authors":"Qingqing Chang, Fanxin Xie, Siyan Mao, Lingsheng Ke, Hailin Zhang, Jie Tang, Jiachun Xiong, Qian Li, Lechang Xu, Ping Li, Tao Qi","doi":"10.1021/acssusresmgt.6c00145","DOIUrl":"https://doi.org/10.1021/acssusresmgt.6c00145","url":null,"abstract":"Impeded by the harsh high-temperature/pressure conditions and persistent uranium (U) radioactivity, industrial scalability of the stepwise alkaline disposal for ion-adsorption rare earth elements (REEs) low-level radioactive residues (IAREEs-LLRRs) faced challenges. This work presented a mild atmospheric-pressure process for deep U(VI) extraction. After initial Al(III) leaching from IAREEs-LLRRs with dilute NaOH at atmospheric pressure, U(VI) was selectively leached using a NaHCO3–Na2CO3 buffer (pH 9–10, ≤90 °C), achieving 95.8% U(VI) extraction and reducing residue’s U-specific activity from 13.9 to 0.72 Bq·g–1 (<1 Bq·g–1 regulatory limit). The stepwise mild alkaline process cumulatively leached ∼88 wt% Al and ∼97 wt% U, achieving a weight reduction of ∼77 wt%, and enriched the REEs grade from 0.88 to 2.23 wt%. The U(VI) deep leaching mechanism proceeded via stabilization of soluble [UO2(CO3)3]4– while suppressing Na2U2O7 precipitation in the NaHCO3–Na2CO3 buffer at atmospheric pressure. Techno-economic assessment confirmed that this approach offered a viable and compliant route for sustainable residue detoxification and resource recovery.","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"3 9","pages":"2975–2984"},"PeriodicalIF":0.0,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Substitution of Fossil Carbon with Kraft Lignin in Carbon Aggregates for Metallurgical Furnace Electrode Development 用硫酸盐木质素替代碳集料中的化石碳用于冶金炉电极研制

ACS Sustainable Resource Management Pub Date : 2026-09-24 Epub Date: 2026-09-01 DOI: 10.1021/acssusresmgt.6c00426

Lena Reimund, Luis M. Lopéz Renau, Jesse F. White, Björn Glaser

{"title":"Substitution of Fossil Carbon with Kraft Lignin in Carbon Aggregates for Metallurgical Furnace Electrode Development","authors":"Lena Reimund, Luis M. Lopéz Renau, Jesse F. White, Björn Glaser","doi":"10.1021/acssusresmgt.6c00426","DOIUrl":"https://doi.org/10.1021/acssusresmgt.6c00426","url":null,"abstract":"Fossil-based carbon electrodes used in metallurgical smelting and reduction processes contribute significantly to global greenhouse gas emissions, while stricter EU regulations on polyaromatic hydrocarbon exposure linked to coal tar pitch use further emphasize the need for safer and more sustainable electrode materials. Kraft lignin (KL), an abundant by-product of the pulp and paper industry with an annual production of 42.5 million tons, currently has limited high-value applications. This study investigates the feasibility of using KL as a renewable carbon source to produce carbon aggregate materials by pelletizing mixtures of green petroleum coke and KL in varying ratios. The pellets were heated up to 2650 °C and evaluated based on their thermophysical, mechanical, and electrical properties relevant to electrode applications. Results show that KL effectively binds with petroleum coke when pelletized under pressure. Even at 60 wt % KL content, the materials exhibit a graphitization degree of 70−80% and electrical resistivity below 200 μΩ m, comparable to conventional carbon aggregates. The mixtures withstand both slow and fast heat treatments, demonstrating their suitability for industrial calcination processes. Up to 50−70 wt % of fossil-based carbon could be replaced by KL without compromising aggregate stability or electrical performance, demonstrating strong potential for lower-emission metallurgical electrode production.","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"3 9","pages":"3172–3182"},"PeriodicalIF":0.0,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical Lithium Extraction from Brines Using Dopant-Tailored Titanate Electrodes, with Co-Recovery of Carbonates, Acids, and Bases 使用掺杂剂钛酸盐电极从盐水中提取锂，并与碳酸盐、酸和碱共同回收

ACS Sustainable Resource Management Pub Date : 2026-09-24 Epub Date: 2026-09-03 DOI: 10.1021/acssusresmgt.6c00271

Mahadeo A. Mahadik, Shreya Singh, Mengqi Shen, Sehoon Chang, Greeshma Gadikota

{"title":"Electrochemical Lithium Extraction from Brines Using Dopant-Tailored Titanate Electrodes, with Co-Recovery of Carbonates, Acids, and Bases","authors":"Mahadeo A. Mahadik, Shreya Singh, Mengqi Shen, Sehoon Chang, Greeshma Gadikota","doi":"10.1021/acssusresmgt.6c00271","DOIUrl":"https://doi.org/10.1021/acssusresmgt.6c00271","url":null,"abstract":"Advances in modular separation technologies are crucial for enabling the co-recovery of multiple high-value products from complex and heterogeneous resources such as produced water. The co-recovery of multiple high-value products serves as a hedge against market volatility associated with producing a single product and lowers the quantity of waste that needs to be disposed. In a significant departure from conventional evaporation and chemical precipitation routes to recover lithium, which are slow, resource- and energy-intensive, selective electrochemical recovery of lithium is realized using a self-supported, dopant-engineered H2Ti3O7 electrode. The binder-free architecture, directly grown on titanium foil via hydrothermal synthesis, ensures strong mechanical stability and rapid ion transport. Li+ capture capacity as high as ∼211 ± 15 mg·g–1 is achieved using Nd-doped H2Ti3O7 at –0.9 V vs Ag/AgCl. The separation of Mg2+ and Ca2+ ions via the formation of Mg(OH)2 and CaCO3 (using CO2) is essential for the subsequent reuse of the brine for the electrochemical co-recovery of 0.2–0.3 M NaOH and HCl. Therefore, this work unlocks advances in comprehensive valorization of brine for the co-recovery of multiple high-value critical and commodity materials essential for energy and environmental security and sustainability.","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"3 9","pages":"3013–3026"},"PeriodicalIF":0.0,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physically Informed Multi-Magnification Learning for Scalable, Non-Destructive Assessment of Polypropylene Degradation in Recycled Materials 物理信息多放大学习可伸缩，非破坏性评估聚丙烯降解的回收材料

ACS Sustainable Resource Management Pub Date : 2026-09-24 Epub Date: 2026-09-02 DOI: 10.1021/acssusresmgt.6c00307

Kazuki Hammura, Kiyotaka Hitomi, Kenji Nagata, Masanobu Naito

{"title":"Physically Informed Multi-Magnification Learning for Scalable, Non-Destructive Assessment of Polypropylene Degradation in Recycled Materials","authors":"Kazuki Hammura, Kiyotaka Hitomi, Kenji Nagata, Masanobu Naito","doi":"10.1021/acssusresmgt.6c00307","DOIUrl":"https://doi.org/10.1021/acssusresmgt.6c00307","url":null,"abstract":"Reliable quality control of recycled polypropylene (PP) is essential for circular plastics management, but conventional degradation tests are often destructive or unsuitable for large-scale screening. This study introduces a physically informed, multi-magnification learning framework for non-destructive and scalable assessment of PP degradation from optical micrographs. A three-channel feature representation captures baseline-referenced yellowing, defect-associated contrast, and microstructural anisotropy. To address multi-scale variability, magnification-aware image patches are integrated via a hierarchical attention-based multiple instance learning model. The model jointly predicts continuous weathering cycles and ordinal degradation stages, enabling quantitative evaluation of heterogeneous material conditions. On the validation set, the approach achieved a balanced accuracy of 0.747, a stage-decoded mean absolute error of 5.6 cycles, and a quadratic weighted kappa of 0.908, with an accuracy within ±1 stage of 0.97. Notably, the model identified 10-cycle-related image signals despite the absence of a clear increase in attenuated total reflection infrared carbonyl index under the same conditions. These results demonstrate the feasibility of AI-enabled optical micrograph analysis as a rapid and non-destructive screening approach for weathering-related surface-state assessment under the controlled post-industrial recycled (PIR) PP conditions examined in this study. The framework can therefore serve as a basis for high-throughput image-based screening of weathering-related surface states, although extension to broader recycled PP streams and practical quality attributes requires further validation.","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"3 9","pages":"3048–3057"},"PeriodicalIF":0.0,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0