Circular Economy最新文献

筛选
英文 中文
Effect of different compositions of recycled concrete powder on the hydration characteristics of cement paste 再生混凝土粉不同掺量对水泥浆体水化特性的影响
Circular Economy Pub Date : 2026-03-01 Epub Date: 2026-02-04 DOI: 10.1016/j.cec.2026.100182
Binglin Guo , Kaixuan Wang , Cun Wang , Yuxing Gao , Di Lu , Huyong Qin , Yang Liu , Binggen Zhan , Qijun Yu , Yogarajah Elakneswaran
{"title":"Effect of different compositions of recycled concrete powder on the hydration characteristics of cement paste","authors":"Binglin Guo ,&nbsp;Kaixuan Wang ,&nbsp;Cun Wang ,&nbsp;Yuxing Gao ,&nbsp;Di Lu ,&nbsp;Huyong Qin ,&nbsp;Yang Liu ,&nbsp;Binggen Zhan ,&nbsp;Qijun Yu ,&nbsp;Yogarajah Elakneswaran","doi":"10.1016/j.cec.2026.100182","DOIUrl":"10.1016/j.cec.2026.100182","url":null,"abstract":"<div><div>Recycled concrete powder (RCP) is produced via waste concrete processing. The complex sources of waste concrete form a complex and highly diverse composition in RCP. Different components in RCP affect cement hydration; however, the underlying mechanism of these influences remains unclear. The mechanism of the main components of RCP, such as unhydrated cement, C–S–H and finely ground sand, on the hydration of cement paste still lacks a comprehensive and systematic microscopic analysis. Herein, we selected three RCPs with different components: RCP1 (comprising ∼11% unhydrated cement and 67% C–S–H), RCP2 (comprising ∼56% C–S–H and 40% finely ground sand), and RCP3 (comprising 25% C–S–H and 75% finely ground sand). The influence of different components of RCP on cement hydration was systematically studied. Unhydrated cement in RCP is rehydrated in the mixed system, producing additional hydration products and increasing the total heat of hydration. These secondary hydration products fill the pores of RCP, enhancing the mechanical properties of the cement paste. Calcite in RCP reacts with monosulfate to form carboaluminate, and hemicarboaluminate is converted into monocarboaluminate after 28 days. Although C–S–H and finely ground sand in RCP exhibited different nucleation, water absorption, and filling effects, their total impact on the hydration heat and pore structure of the mixed system was similar. The mechanism is further verified by the strength prediction model. These findings elucidated the reaction mechanisms of RCP incement paste, which can be used for promoting resource-efficient and sustainable development.</div></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"5 1","pages":"Article 100182"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384830","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
Accelerating Zizania latifolia leaf silage fermentation using lactic acid bacteria 利用乳酸菌加速紫穗菊叶片青贮发酵
Circular Economy Pub Date : 2026-03-01 Epub Date: 2026-02-05 DOI: 10.1016/j.cec.2026.100184
Ting Chen , Jun Yu , Xiaoqin Yu , Jie He , Chenlong Yuan , Xuan Xu , Jun Yin , Zhiqiang Chen
{"title":"Accelerating Zizania latifolia leaf silage fermentation using lactic acid bacteria","authors":"Ting Chen ,&nbsp;Jun Yu ,&nbsp;Xiaoqin Yu ,&nbsp;Jie He ,&nbsp;Chenlong Yuan ,&nbsp;Xuan Xu ,&nbsp;Jun Yin ,&nbsp;Zhiqiang Chen","doi":"10.1016/j.cec.2026.100184","DOIUrl":"10.1016/j.cec.2026.100184","url":null,"abstract":"<div><div>Employing <em>Zizania latifolia</em> (Z. latifolia) leaf as ruminant forage offers a sustainable solution to food security and environmental concerns, with its demonstrated ability to reduce farming costs representing a critical implementation advantage. To overcome the pratical limitation of natural fermentation quality variability, this study evaluated two pre-screened lactic acid bacteria (LAB) strains, <em>Lactiplantibacillus plantarum</em> (LP) and <em>Pediococcus pentosaceus</em> (PP), for the potential of LAB to standardize and enhance <em>Z. latifolia</em> production. Through controlled ensiling experiments (LP, PP vs uninoculated control CK) combined with high-throughput sequencing technology and genomic function prediction, we mechanically elucidated how LAB optimize the fermentation process at the microbial community and metabolic pathway levels. The results demonstrated that LAB inoculation fundamentally altered the fermentation dynamics: (1) Rapid acidification: Both the LP and PP groups achieved pH &lt; 4.2 within 3 days (vs. CK failed to reach this threshold even after 42 days), with butyric acid contents maintained at &lt; 1 g/kg dry matter (DM) (vs 4.84 g/kg DM in CK). (2) Nutritional superiority: Inoculated groups showed 86% (LP) and 52% (PP) higher crude protein retention than CK. (3) Microbial dominance: High-throughput sequencing revealed that the relative abundance of LAB exceeded 90% within 24 h post-inoculation (vs &lt; 35% in CK), explaining the suppressed spoilage microbiota. (4) Mechanistic insight: Gene function prediction identified quorum sensing-mediated biofilm disruption as the key accelerator. This synergistic effect enabled 35-day cycle shortening while enhancing nutritional quality, establishing a new efficiency benchmark for agri-waste valorization.</div></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"5 1","pages":"Article 100184"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384832","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
Zero-waste Sports Events—A case study of the 19th Asian Games Hangzhou 零浪费体育赛事——以第19届杭州亚运会为例
Circular Economy Pub Date : 2026-03-01 Epub Date: 2025-11-26 DOI: 10.1016/j.cec.2025.100172
Shanming Chen , Jiansong Cao , Xiaoyan Zhao
{"title":"Zero-waste Sports Events—A case study of the 19th Asian Games Hangzhou","authors":"Shanming Chen ,&nbsp;Jiansong Cao ,&nbsp;Xiaoyan Zhao","doi":"10.1016/j.cec.2025.100172","DOIUrl":"10.1016/j.cec.2025.100172","url":null,"abstract":"<div><div>Large-scale sporting events are often associated with substantial solid waste generation due to venue construction and high attendee numbers. The 19th Asian Games Hangzhou, noted for its unprecedented participation, experienced a significant increase in waste. Nevertheless, through the integration of the “Zero-waste City” concept and green hosting mandates, Hangzhou Asian Games successfully became the first large-scale “Zero-waste Sports Event”. This study examines the development and achievements of the “Zero-waste Asian Games”, using the 19th Asian Games Hangzhou as a case study. The research involved an analysis of pertinent policy documents from Zhejiang Province and Hangzhou concerning waste management, the “Zero-waste City” model, and the “Zero-waste Asian Games”. The “Zero-waste Asian Games” proactively incorporated “zero-waste” principles across pre-event, in-event, and post-event activities, with a focus on source reduction, reuse, and responsible solid waste disposal. This study provides valuable insights for both “Zero-waste City” development and planning future “Zero-waste Events”.</div></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"5 1","pages":"Article 100172"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145698042","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
E-waste in the circular economy: Molecular and experimental insights into cement incorporation of waste printed circuit board 循环经济中的电子垃圾:废弃印刷电路板中水泥掺入的分子和实验见解
Circular Economy Pub Date : 2026-03-01 Epub Date: 2026-02-05 DOI: 10.1016/j.cec.2026.100183
Rene Francisco Boschi Gonçalves , Zhitong Yao , José Atílio Fritz Fidel Rocco
{"title":"E-waste in the circular economy: Molecular and experimental insights into cement incorporation of waste printed circuit board","authors":"Rene Francisco Boschi Gonçalves ,&nbsp;Zhitong Yao ,&nbsp;José Atílio Fritz Fidel Rocco","doi":"10.1016/j.cec.2026.100183","DOIUrl":"10.1016/j.cec.2026.100183","url":null,"abstract":"<div><div>The escalating generation of electronic waste (e-waste) poses critical environmental and health challenges, with waste printed circuit boards (WPCBs, 4 wt.%–6 wt.% of e-waste) representing a particularly hazardous fraction due to their complex composition of metals, polymers, and brominated flame retardants. This study explores the valorization of WPCBs as a partial cement replacement to both mitigate disposal risks and enhance cementitious performance. Portland cement pastes incorporating 0 wt.%, 5 wt.%, 10 wt.%, and 15 wt.% WPCBs were examined through isothermal calorimetry, Fourier transform infrared (FT-IR) spectroscopy, and reactive molecular dynamics (RMD) simulations using the reactive force field. Calorimetry revealed that 10% WPCBs yielded the highest heat release (≈25 °C peak, 10% higher than reference), indicating optimal hydration kinetics, while 15 wt.% WPCBs reduced exothermicity by 8% due to inert filler effects and bromine-induced retardation. FT-IR revealed intensified Si–O stretching (953 cm<sup>−1</sup>) and free O–H (3640 cm<sup>−1</sup>) at 10 wt.%, confirming enhanced C–S–H and CH formation. RMD simulations provided molecular-level insights, showing denser C–S–H networks and the lowest total energy (−6.82 × 10<sup>5</sup> kcal/mol) for 10 wt.% WPCBs, whereas 15 wt.% loading disrupted network formation. The integrated findings suggested that WPCBs can be safely immobilized within cement matrices, with 10 wt.% substitution offering a balance between performance gains and hydration integrity. This work advances the understanding of WPCB–cement interactions and supports the development of sustainable, circular-economy construction materials.</div></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"5 1","pages":"Article 100183"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384831","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
Optimization of thermochemical pyrolysis performance of distillers’ grains in a heat-storage rotary bed: A pilot study 蓄热旋转床中酒糟热化学热解性能优化:中试研究
Circular Economy Pub Date : 2026-03-01 Epub Date: 2026-01-22 DOI: 10.1016/j.cec.2026.100179
Jingru Diao , Yifan Zhao , Pu Lyu , Xiaowei Wang , Dayang Yu , Yuchao Shao , Shijiao Li , Pengfei Wang , Shi Cheng , Zhe Zhang , Dongxiao Sun , Zhiqiang Dong , Haiya Zhang , Yilin Wang , Yilin Yang
{"title":"Optimization of thermochemical pyrolysis performance of distillers’ grains in a heat-storage rotary bed: A pilot study","authors":"Jingru Diao ,&nbsp;Yifan Zhao ,&nbsp;Pu Lyu ,&nbsp;Xiaowei Wang ,&nbsp;Dayang Yu ,&nbsp;Yuchao Shao ,&nbsp;Shijiao Li ,&nbsp;Pengfei Wang ,&nbsp;Shi Cheng ,&nbsp;Zhe Zhang ,&nbsp;Dongxiao Sun ,&nbsp;Zhiqiang Dong ,&nbsp;Haiya Zhang ,&nbsp;Yilin Wang ,&nbsp;Yilin Yang","doi":"10.1016/j.cec.2026.100179","DOIUrl":"10.1016/j.cec.2026.100179","url":null,"abstract":"<div><div>Pyrolysis of distillers’ grains was innovatively investigated to establish a multi-objective optimization framework, identifying the optimal pyrolysis time, in a 2.8 t/h pilot-scale regenerative rotary-bed reactor under fixed temperature profiles (700–900 °C) and an inert nitrogen atmosphere. Three residence-time scenarios (60, 70, 80 min) were systematically evaluated to balance product yields, char quality, gas composition and energy input. The findings indicated that extending residence time decreased solid yield by 3%–6%, increased gas yield by 5%–10%, and reduced char volatile matter from 12.7% to 7.3%, while its calorific value declined from 4435 to 4107 kcal/kg. Remarkably, the combustible gas fraction (H<sub>2</sub>, CO, CH<sub>4</sub>, C<sub><em>n</em></sub>H<sub><em>m</em></sub>) exhibited a non-linear trend (71.7%–77.7%), and the specific energy consumption rose from 3.0 to 3.7 GJ/t. Conclusively, a multi-criteria assessment incorporating product distribution, char properties, gas heating value, and energy demand identified 70 min as the industrially optimal residence time, delivering maximal product value with the lowest energy penalty (3.2 GJ/t). The findings establish critical engineering parameters for large-scale pyrolysis of distillery waste through advanced rotary-bed pyrolysis technology, supporting sustainable waste management and circular bioeconomic development.</div></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"5 1","pages":"Article 100179"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146173427","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
Development of latex-based sustainable composites reinforced with leather trimming dust and ZnO nanoparticles for antibacterial shoe insole application: A circularity approach 用皮革修整粉尘和氧化锌纳米颗粒增强乳液基可持续复合材料抗菌鞋垫的开发:一种循环方法
Circular Economy Pub Date : 2026-03-01 Epub Date: 2026-02-02 DOI: 10.1016/j.cec.2026.100181
Md. Ariful Islam , Papia Haque , Mohammed Mizanur Rahman
{"title":"Development of latex-based sustainable composites reinforced with leather trimming dust and ZnO nanoparticles for antibacterial shoe insole application: A circularity approach","authors":"Md. Ariful Islam ,&nbsp;Papia Haque ,&nbsp;Mohammed Mizanur Rahman","doi":"10.1016/j.cec.2026.100181","DOIUrl":"10.1016/j.cec.2026.100181","url":null,"abstract":"<div><div>This study addresses the challenge of solid waste management in the leather industry, particularly focusing on vegetable-tanned leather trimming dusts, which are often underutilized. Instead of traditional applications such as fish/poultry feed or cosmetics, this research proposes an innovative approach to repurpose this waste material by incorporating green zinc oxide nanoparticles (ZnO NPs) to produce antibacterial shoe insoles. ZnO NPs were synthesized using the chemical co-precipitation method and the plant-mediated synthesis method with banana peel extract. The nanoparticles were integrated into vegetable-tanned leather trimming dust and latex-based biocomposites optimized with the multi-criteria decision-making weighted sum model (MCDM–WSM). Through comprehensive characterization techniques, including FTIR, XRD, FESEM, EDX, DLS, and thermal analysis, the successful incorporation of nano-sized ZnO was confirmed, demonstrating diameters ranging from 65 to 91 nm and uniform distribution within the composite matrix. The composite showed enhanced mechanical properties, with tensile strength ranging from 11.6 ± 0.6 to 13.5 ± 0.2 MPa, a flexing index of approximately 3.95, and a stitch tear strength between 845 and 867 N/mm, which are comparable to the mechanical properties of a shoe insole. Antibacterial testing further revealed significant inhibition of <em>Bacillus subtilis</em> and <em>Escherichia coli</em> growth. These findings emphasize the potential of the composite as a viable alternative to conventional insoles, offering enhanced antibacterial benefits.</div></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"5 1","pages":"Article 100181"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384828","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
Life cycle assessment approach for upcycling expanded polystyrene across industrial sectors 工业部门升级回收膨胀聚苯乙烯的生命周期评估方法
Circular Economy Pub Date : 2026-03-01 Epub Date: 2026-01-30 DOI: 10.1016/j.cec.2026.100180
Haoyang He , Jon Timbers , Claude-Anne Duval , Michael Cech , Joel DeMeritt , Johnny Lincoln , Oladele A. Ogunseitan , Julie M. Schoenung
{"title":"Life cycle assessment approach for upcycling expanded polystyrene across industrial sectors","authors":"Haoyang He ,&nbsp;Jon Timbers ,&nbsp;Claude-Anne Duval ,&nbsp;Michael Cech ,&nbsp;Joel DeMeritt ,&nbsp;Johnny Lincoln ,&nbsp;Oladele A. Ogunseitan ,&nbsp;Julie M. Schoenung","doi":"10.1016/j.cec.2026.100180","DOIUrl":"10.1016/j.cec.2026.100180","url":null,"abstract":"<div><div>The recycling of polystyrene and its reuse in consumer products, such as bicycle helmets, is important to the implementation of a circular economy due to its high production volume and environmental recalcitrance. In this study, we conducted a streamlined life cycle assessment to compare the environmental impact of producing expandable polystyrene from primary sources with production from post-consumer waste. In addition, we evaluated the environmental impact of utilizing these two polystyrene feedstock materials in bicycle helmets, and we further compared these impacts to those associated with other compositional and packaging materials. We applied up-to-date manufacturing data and well-established life cycle inventory databases using the ReCiPe 2016 life cycle impact assessment method. The seventeen environmental impact categories evaluated exhibit beneficial net reductions (in the range of 0%–45%) for the case study of using 50% post-consumer recycled expanded polystyrene. A focused analysis on global warming potential, fine particulate matter formation, freshwater ecotoxicity, human carcinogenic toxicity, mineral resource scarcity, and water consumption illustrates higher reductions in impact (in the range of 40%–45%) for global warming potential, fine particulate matter formation, and carcinogenicity and lower reductions in impact (in the range of 10%–15%) for freshwater toxicity and water consumption. Notably, the contribution of utilities is smaller than that of materials in most of the environmental impact categories, except for water consumption. In addition, the environmental impact is reduced when using 50% post-consumer polystyrene for the manufacturing of bicycle helmets, e.g., in the range of 5%–10% for global warming potential. The results demonstrate that the use of post-consumer recycled expanded polystyrene leads to considerable environmental impact reductions and that future studies considering novel recycling technologies and broader material selection choices should be pursued.</div></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"5 1","pages":"Article 100180"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384827","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
Life cycle assessment of phosphogypsum utilization technologies: Method application and environment performance of technologies 磷石膏利用技术的生命周期评价:方法、应用和技术的环境性能
Circular Economy Pub Date : 2025-12-01 Epub Date: 2025-11-19 DOI: 10.1016/j.cec.2025.100171
Ning Ding , Han Cui , Jianxin Yang , Pinqiao Ren
{"title":"Life cycle assessment of phosphogypsum utilization technologies: Method application and environment performance of technologies","authors":"Ning Ding ,&nbsp;Han Cui ,&nbsp;Jianxin Yang ,&nbsp;Pinqiao Ren","doi":"10.1016/j.cec.2025.100171","DOIUrl":"10.1016/j.cec.2025.100171","url":null,"abstract":"<div><div>An increasing number of technologies have been developed and applied to use phosphogypsum (PG) resources and reduce their environmental impact (EI) entirely. This research examines the life cycle assessment (LCA) of six types of PG utilization technologies (PGUTs), with a focus on evaluating the limitations of the product LCA method, exploring methodological improvements, and reviewing the EI of these technologies. Owing to the diverse characteristics of technologies and products, variations were observed in the LCA components of the functional unit, system boundary, inventory allocation methods, and selection of EI categories. For most PGUTs, abiotic depletion potential and global warming potential were the predominant categories, with ecotoxicity also identified as a significant concern. This research highlights the inapplicability of LCA for technology, provides specific suggestions for setting key components of LCA for PGUTs for the first time, proposes an innovation improvement for the LCA method and contributes to the optimization and selection of PGUTs.</div></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"4 4","pages":"Article 100171"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145617778","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
The impact of green technology innovation on the comprehensive utilization rate of non-hazardous industrial solid waste 绿色技术创新对无害工业固体废物综合利用率的影响
Circular Economy Pub Date : 2025-12-01 Epub Date: 2025-11-17 DOI: 10.1016/j.cec.2025.100169
Ruiheng Liu , Zhengning Pu , Yasong Zhao , Cheng Yu , Jiawei Wang
{"title":"The impact of green technology innovation on the comprehensive utilization rate of non-hazardous industrial solid waste","authors":"Ruiheng Liu ,&nbsp;Zhengning Pu ,&nbsp;Yasong Zhao ,&nbsp;Cheng Yu ,&nbsp;Jiawei Wang","doi":"10.1016/j.cec.2025.100169","DOIUrl":"10.1016/j.cec.2025.100169","url":null,"abstract":"<div><div>The comprehensive utilization of non-hazardous industrial solid waste (NHISW) is a key focus of the circular economy. This paper argues that green technology innovation is a crucial factor in improving the comprehensive utilization rate of NHISW. Through theoretical analysis, an empirical study is conducted using a sample of 297 cities in China from 2003 to 2019. The study revealed that green technology innovation can significantly enhance the comprehensive utilization rate of the NHISW. This conclusion remains robust after conducting robustness tests and addressing endogeneity issues via two-stage least squares (2SLS) and the difference generalized method of moments (GMM) estimation. The heterogeneity analysis reveals that green technology innovation significantly boosts the comprehensive utilization of NHISW in the first stage of the environmental Kuznets curve, but its marginal effect decreases as the economy grows. Additionally, a higher proportion of the secondary sector negatively moderates this relationship. This study suggests that the government can strengthen policy support for green technology innovation and encourage the application of green technology to improve the comprehensive utilization rate of NHISW.</div></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"4 4","pages":"Article 100169"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145617707","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
Enhancing plant growth using anaerobic co-digestate of pig manure, food waste, and coffee grounds 利用猪粪、食物垃圾和咖啡渣的厌氧共消化促进植物生长
Circular Economy Pub Date : 2025-12-01 Epub Date: 2025-11-19 DOI: 10.1016/j.cec.2025.100170
Thipwan Jiemanukunkij , Cheerapat Supawatkon , Charndanai Tirapanampai , Kittituch Thupwong , Apisit Wongsabot , Ruchanok Tinikul , Pimchai Chaiyen , Somchart Maenpuen , Thanyaporn Wongnate
{"title":"Enhancing plant growth using anaerobic co-digestate of pig manure, food waste, and coffee grounds","authors":"Thipwan Jiemanukunkij ,&nbsp;Cheerapat Supawatkon ,&nbsp;Charndanai Tirapanampai ,&nbsp;Kittituch Thupwong ,&nbsp;Apisit Wongsabot ,&nbsp;Ruchanok Tinikul ,&nbsp;Pimchai Chaiyen ,&nbsp;Somchart Maenpuen ,&nbsp;Thanyaporn Wongnate","doi":"10.1016/j.cec.2025.100170","DOIUrl":"10.1016/j.cec.2025.100170","url":null,"abstract":"<div><div>This study demonstrates a novel application of anaerobic co-digestate liquid (AcoDL), derived from pig manure inoculum, food waste, and spent coffee grounds (PMI/FW/SCG), as a sustainable biofertilizer. The PMI/FW/SCG AcoDL exhibited a favorable physicochemical profile (pH 8.09, electrical conductivity 14.44 mS/cm; N–P–K: 0.16–1.23–0.15% w/w) and contained plant growth-promoting compounds such as salicylic acid, kinetin, and essential amino acids. Microbial community analysis revealed a dominance of beneficial taxa, particularly <em>Methanothrix soehngenii</em> (55.98%) and <em>Propionibacterium</em> sp. (5.76%). In hydroponic cultivation, AcoDL supplementation increased the biomass of green oak lettuce by approximately 2.7-fold (127.6 g compared with 47.9 g in the controls). In soil-based systems, the combination of AcoDL with cow manure markedly increased triterpene accumulation in Gotu Kola, with asiaticoside (71.49 mg) and madecassoside (41.55 mg) levels reaching 2–3 times higher than those in the controls. Biotoxicity assays confirmed its safety for agricultural applications. Collectively, these findings demonstrate that PMI/FW/SCG AcoDL functions as a sustainable and eco-friendly fertilizer that not only improves crop yield but also promotes the production of bioactive compounds. By converting organic waste into a high-value agricultural input, this approach advances circular waste management, reduces reliance on synthetic fertilizers, and supports sustainable crop production.</div></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"4 4","pages":"Article 100170"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145617708","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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信
小红书