Journal of Cleaner Production最新文献

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Development of a novel cleaner and moisture-proof powder dispensing device for instant tea machines
IF 9.7 1区 环境科学与生态学
Journal of Cleaner Production Pub Date : 2025-02-19 DOI: 10.1016/j.jclepro.2025.145062
Xiaohua Xia, Zhiyaojia Zhou, Xinyu Jia, Yihao Deng, Yingshuo Zhu, Longlong Miao, Haiyun Tan
{"title":"Development of a novel cleaner and moisture-proof powder dispensing device for instant tea machines","authors":"Xiaohua Xia,&nbsp;Zhiyaojia Zhou,&nbsp;Xinyu Jia,&nbsp;Yihao Deng,&nbsp;Yingshuo Zhu,&nbsp;Longlong Miao,&nbsp;Haiyun Tan","doi":"10.1016/j.jclepro.2025.145062","DOIUrl":"10.1016/j.jclepro.2025.145062","url":null,"abstract":"<div><div>This research presents a new technical approach that uses stick packages as the dispensing material to address problems of moisture absorption, clumping, and spoilage of the powder in instant tea machines. The protection provided by stick packages isolates the powder from air, addressing issues related to moisture absorption and associated problems. In addition, the approach advances the design of a novel cleaner and moisture-proof powder dispensing device. Three main innovative mechanisms including the stick package separation mechanism, the stick package orientation correction mechanism and the stick package cutting and shaking mechanism are designed to complete the dispensing task. The separation mechanism combines a hopper, chain-driven plates and PLA-coated boards to sort the disordered stick packages in an orderly manner and output individually. The specially designed destabilizing bar and correction surface are utilized in the orientation correction mechanism to rotate the package from horizontal to vertical pose without external power. In the cutting and shaking mechanism, four linear actuators and a triangular blade attached to the tip of one of them work together to fix and cut the stick package, and a servo motor drives the rotating section to make the powder drop from the stick package by shaking. The experimental results show that the device using the new approach exhibits excellent performance. It has a stable powder dispensing rate of 76%–80%, with a consistent beverage quality. The dispensing time is approximately 30 s, which is approximately equal to that of current devices. The maximum hopper capacity is 60 stick packages, reducing the frequency of refilling and labor intensity. It also features a long maintenance cycle and simplifies the powder-loading process. In terms of health and hygiene, the new device significantly extends the cleaning cycle and powder replacement cycle, minimizing contact with powder and reducing the risk of contamination. Economically, it can save 44.81% of the costs over its life cycle in a typical studio scenario. The new device prevents the powder from absorbing moisture, clumping, and spoiling, and achieves cleaner production.</div></div>","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"495 ","pages":"Article 145062"},"PeriodicalIF":9.7,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143443932","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}
引用次数: 0
Clean Recovery Rare Earth Elements from NdFeB Magnets Waste by Using AlCl3 Solution - a Closed-loop Process
IF 11.1 1区 环境科学与生态学
Journal of Cleaner Production Pub Date : 2025-02-19 DOI: 10.1016/j.jclepro.2025.145085
Zhihan Zhang, Guobiao Li, Zhi Wang, Rui Min, Tao Qi, Dong Wang
{"title":"Clean Recovery Rare Earth Elements from NdFeB Magnets Waste by Using AlCl3 Solution - a Closed-loop Process","authors":"Zhihan Zhang, Guobiao Li, Zhi Wang, Rui Min, Tao Qi, Dong Wang","doi":"10.1016/j.jclepro.2025.145085","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.145085","url":null,"abstract":"NdFeB permanent magnets are crucial for the new energy and electronic information industries, and NdFeB magnets waste is also most significant rare earth secondary resources. The current mainstream recycling process is based on HCl leaching solvent extraction, which consumes a large amount of HCl and chemical reagents, inevitably, generates wastewater and organic waste, causing serious environmental pollution. This work developed an alternative green process for selectively recovering rare earth elements from NdFeB permanent magnets using AlCl<sub>3</sub> solution, which can selectively dissolve Nd<sub>2</sub>O<sub>3</sub> of roasted NdFeB, and the separation factor between Nd and Fe can reach 6617. Molecular dynamics calculations indicate that as the concentration increases, Al<sup>3+</sup> tends to form polymers. This is mainly due to the polarization effect of Al<sup>3+</sup>, which affects the hydrogen bonding structure between water molecules, leading to more water molecules coordinating with them. Simultaneously, due to the solvation effect, agglomeration phenomena also occurred between Al<sup>3+</sup>. In addition, the polarization effect of Al<sup>3+</sup> weakens the strength of hydroxyl bonds in H<sub>2</sub>O molecules. Consequently, more active protons were ionized in the solution and selective dissolution of Nd<sub>2</sub>O<sub>3</sub> was achieved. After 10 leaching cycles, the solution still maintains excellent separation performance of selectively dissolve rare earth elements of NdFeB magnets waste. The chemical reagent investment in this process is about one-third of the existing industry process, providing a promising approach for the green and acid free recovery of rare earth elements secondary resources.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"89 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452274","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}
引用次数: 0
Multiscale analysis of ecosystem service interactions and driving factors in the Loess Plateau: Implications for ecological management
IF 9.7 1区 环境科学与生态学
Journal of Cleaner Production Pub Date : 2025-02-19 DOI: 10.1016/j.jclepro.2025.145074
Tao Xu , Guangjin Tian , Tong Lin , Wanlong Li , Chenxi Liu
{"title":"Multiscale analysis of ecosystem service interactions and driving factors in the Loess Plateau: Implications for ecological management","authors":"Tao Xu ,&nbsp;Guangjin Tian ,&nbsp;Tong Lin ,&nbsp;Wanlong Li ,&nbsp;Chenxi Liu","doi":"10.1016/j.jclepro.2025.145074","DOIUrl":"10.1016/j.jclepro.2025.145074","url":null,"abstract":"<div><div>Clarifying the interaction relationships between ecosystem services (ES) and their driving factors at various scales is crucial for achieving zonal management. This study assessed the changes in five types of ES and the multi-ecosystem service landscape index (MESLI) in the Loess Plateau (LP) from 2000 to 2020, focusing on the trade-offs and synergies among ES at different scales, and identifying ES bundles and their key driving factors. The results showed that: (1) The spatial distribution pattern of ES in the LP remained relatively stable. Over time, water yield and soil conservation services significantly increased, while habitat quality, carbon sequestration, and water purification services showed minimal changes. (2) The trade-offs among ES were primarily concentrated between carbon sequestration, habitat quality, and nitrogen and phosphorus outputs, with these areas mainly distributed in unused land and cropland. In contrast, the most notable synergies were observed between carbon sequestration and habitat quality, primarily found in forested areas. (3) Based on the interactions and scale effects of ES, we identified corresponding ES bundles and determined that precipitation, normalized difference vegetation index (NDVI), and drought index were the key driving factors for most ES bundles. The study provides an important reference for regional zonal management, emphasizing the importance of comprehensively considering the interaction relationships and driving factors of ES at different scales.</div></div>","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"495 ","pages":"Article 145074"},"PeriodicalIF":9.7,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452349","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}
引用次数: 0
An integration model enabled deep learning for energy prediction of machine tools
IF 9.7 1区 环境科学与生态学
Journal of Cleaner Production Pub Date : 2025-02-19 DOI: 10.1016/j.jclepro.2025.145075
Yang Xie , Yiqun Dai , Chaoyong Zhang , Jinfeng Liu
{"title":"An integration model enabled deep learning for energy prediction of machine tools","authors":"Yang Xie ,&nbsp;Yiqun Dai ,&nbsp;Chaoyong Zhang ,&nbsp;Jinfeng Liu","doi":"10.1016/j.jclepro.2025.145075","DOIUrl":"10.1016/j.jclepro.2025.145075","url":null,"abstract":"<div><div>CNC (Computer numerical control) machining has been extensively used in the automation industry. However, dynamic energy consumption process and processing status of machine tools are unclear, which restrict the intelligent development of digital manufacturing equipment. Besides, it is difficult to extract feature of energy consumption and identify stages of working conditions with high quality. To this end, this paper proposed an integration model enabled deep learning for energy prediction of machine tools, which incorporates ensemble learning model and Long-short Term Memory (LSTM) neural network. Firstly, the dynamic characteristics of energy consumption in machine tools was discussed, and a model of energy consumption considering material removal rate (MRR) was constructed, which can be found the influencing factors of machining process. Secondly, the power signal collected was preprocessed by wavelet and then extracted with features manually, which can serve as input value for ensemble model. Moreover, LSTM was proposed to predict the nonlinear curve of power, where XGBoost performed regression analysis forward. Furthermore, the sequential mechanism of energy consumption based on the processing status of machine tools was studied, and a feature-driven model of state recognition was developed based on XGBoost. An example taken by milling process is given to demonstrate that the proposed integration model can predict energy consumption with an average error less than 5%, and the accuracy of state recognition can be improved to 96.8%.</div></div>","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"495 ","pages":"Article 145075"},"PeriodicalIF":9.7,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452273","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}
引用次数: 0
Gas-producing characteristics of cemented gangue-fly ash backfill and its influence on false alarm of CO monitoring in coal mines
IF 9.7 1区 环境科学与生态学
Journal of Cleaner Production Pub Date : 2025-02-18 DOI: 10.1016/j.jclepro.2025.145052
Xixian Sun , Kun Zhou , Haoyue Ma , Xiaoqiang Zhang , Xiaoxing Zhong , Weidong Lu
{"title":"Gas-producing characteristics of cemented gangue-fly ash backfill and its influence on false alarm of CO monitoring in coal mines","authors":"Xixian Sun ,&nbsp;Kun Zhou ,&nbsp;Haoyue Ma ,&nbsp;Xiaoqiang Zhang ,&nbsp;Xiaoxing Zhong ,&nbsp;Weidong Lu","doi":"10.1016/j.jclepro.2025.145052","DOIUrl":"10.1016/j.jclepro.2025.145052","url":null,"abstract":"<div><div>The filling mining practice in coal mines shows that the gases produced by the reaction within the cemented gangue-fly ash backfill slurry causes CO monitoring errors. In this study, two slurries with the coarse aggregate and fine aggregate schemes in the filling mining are used to investigate the gas-producing characteristics and mechanism, and the effect of gas composition on the electrochemical CO sensor for mining is also studied. Results indicate as the reaction of the slurry continues, the concentrations of O<sub>2</sub> and CO<sub>2</sub> decrease, while the concentrations of CO, CH<sub>4,</sub> and H<sub>2</sub> increase, and the mechanisms of gases consumption and production are obtained by comparing the crystal structure of CGFB slurry before and after reaction. Furthermore, H<sub>2</sub> is the primary factor causing the false alarm of the electrochemical CO sensor and has a positive cross-interference, which is quantified by interference factor <em>Q</em>. <em>Q</em> value is mainly affected by H<sub>2</sub> or CO concentration when H<sub>2</sub> concentration is lower or higher than 30 ppm, respectively. Meanwhile, an effective method is proposed to solve the false alarm of the electrochemical CO sensor by correcting the measurements using dynamic <em>Q</em> and the on-site H<sub>2</sub> concentration, and the absolute error of the corrected value is less than 1 ppm.</div></div>","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"495 ","pages":"Article 145052"},"PeriodicalIF":9.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143443933","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}
引用次数: 0
Cement roof tiles manufactured with PET waste: Experimental tests and thermal building simulations
IF 9.7 1区 环境科学与生态学
Journal of Cleaner Production Pub Date : 2025-02-18 DOI: 10.1016/j.jclepro.2025.145063
Ivan Julio Apolonio Callejas , Emeli Lalesca Aparecida da Guarda , Luciane Cleonice Durante , Eduardo Krüger
{"title":"Cement roof tiles manufactured with PET waste: Experimental tests and thermal building simulations","authors":"Ivan Julio Apolonio Callejas ,&nbsp;Emeli Lalesca Aparecida da Guarda ,&nbsp;Luciane Cleonice Durante ,&nbsp;Eduardo Krüger","doi":"10.1016/j.jclepro.2025.145063","DOIUrl":"10.1016/j.jclepro.2025.145063","url":null,"abstract":"<div><div>A number of studies have demonstrated the feasibility of recycling Polyethylene Terephthalate (PET) as an input for manufacturing mortar or concrete artifacts. In this study, the thermal performance of extruded cement tiles manufactured with partial replacement of fine aggregate using PET flakes was gauged. Physical properties (solar absorptance) and thermal properties (emissivity, conductivity, and thermal capacity) of tiles with and without PET incorporation were evaluated. Using characteristic properties obtained from measured data, thermal simulations were performed for a single-family building intended for the Brazilian social housing. Surface Heat Balance Approach was employed to identify the impact of using different tiles as an external component in two different roof geometries: without a ceiling and with an attic space as buffer zone. The indoor Standard Effective Temperature was also assessed so as to inform potential benefits of the PET tiles for both roof geometries in terms of thermal comfort across the year and during an overheating period. Notably, due to the texture and coloring of the PET flakes, there was a reduction in solar absorptance and an increase in thermal emissivity. Replacing sand by PET into the cement matrix led to a 12.5% reduction in thermal conductivity and a 30% increase in thermal capacity for the tiles. In both roof geometries simulated, the adoption of PET tiles consistently improved thermal insulation, slightly reducing heat gains through the roof system. PET tiles and attic combined can reduce the severity and intensity of the indoor environments during overheating events, providing conditions that are more tolerable to occupants. Therefore, cement tiles incorporating PET represent a technically viable strategy for promoting urban sustainability, while also preventing the release of PET waste into illegal areas or landfills, thereby complying with the 2030 Agenda for Sustainable Development.</div></div>","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"495 ","pages":"Article 145063"},"PeriodicalIF":9.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143443938","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}
引用次数: 0
The carbon emission reduction roadmap and policy of inland river ships in the yangtze river basin
IF 9.7 1区 环境科学与生态学
Journal of Cleaner Production Pub Date : 2025-02-18 DOI: 10.1016/j.jclepro.2025.145056
Xin Peng, Wen Yi, Hongru Zhang, Kebin He, Huan Liu
{"title":"The carbon emission reduction roadmap and policy of inland river ships in the yangtze river basin","authors":"Xin Peng,&nbsp;Wen Yi,&nbsp;Hongru Zhang,&nbsp;Kebin He,&nbsp;Huan Liu","doi":"10.1016/j.jclepro.2025.145056","DOIUrl":"10.1016/j.jclepro.2025.145056","url":null,"abstract":"<div><div>This study investigates a carbon reduction roadmap for inland waterway ships in China's Yangtze River Basin to support carbon neutrality objectives in the transportation sector. A scenario analysis was employed to develop a carbon emission prediction model, evaluating existing policies and technologies measures for emission mitigation. Three distinct scenarios were examined: Business-as-Usual (BAU), 2°C-aligned, and 1.5°C-aligned pathways. The model projects carbon emission intensity and annual emissions from 2025 to 2060, revealing that under the 1.5°C-aligned scenario, the Energy Efficiency Operational Indicator (EEOI) could decline to 0.491 <span><math><mrow><mi>g</mi><mo>∙</mo><msup><mtext>ton</mtext><mrow><mo>−</mo><mn>1</mn></mrow></msup><mo>∙</mo><msup><mtext>km</mtext><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span> by 2060, representing a 92.35% reduction from 2022 levels. Sectoral carbon emissions are anticipated to peak by 2030, subsequently decreasing by 39.4% from 2025 levels by 2060. The results indicate that achieving zero carbon emissions in the Yangtze River inland waterway transportation solely through energy transformation is highly challenging.</div></div>","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"495 ","pages":"Article 145056"},"PeriodicalIF":9.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143443935","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}
引用次数: 0
Energy transition in tissue paper industry through solid biomass combustion and gasification: Techno-economic potential and limitations
IF 9.7 1区 环境科学与生态学
Journal of Cleaner Production Pub Date : 2025-02-18 DOI: 10.1016/j.jclepro.2025.145014
Alessio Ciambellotti , Arianna Baldinelli , Stefano Frigo , Stefano Pecchia , Umberto Desideri
{"title":"Energy transition in tissue paper industry through solid biomass combustion and gasification: Techno-economic potential and limitations","authors":"Alessio Ciambellotti ,&nbsp;Arianna Baldinelli ,&nbsp;Stefano Frigo ,&nbsp;Stefano Pecchia ,&nbsp;Umberto Desideri","doi":"10.1016/j.jclepro.2025.145014","DOIUrl":"10.1016/j.jclepro.2025.145014","url":null,"abstract":"<div><div>The pulp and paper industry is a hard-to-abate sector still largely relying on fossil fuels. Tissue paper manufacturing necessitates c.a. 1300 kWh<sub>th</sub>/t<sub>paper</sub>(up to 500 °C) and 800 kWh<sub>e</sub>/t<sub>paper</sub> to maintain high productivity performance. Within this framework, this study addresses the use of bioenergy in the tissue paper manufacturing sector, where ready-to-use cellulose is imported and there is no autochthonous biowaste availability like in Kraft-based pulping processes. Assuming the adoption of conventional and reliable systems (biomass boilers, biomass gasifiers and cogeneration systems), this paper examines both the potential environmental benefits and the techno-economical challenges of their implementation in basic layouts and in cogeneration solutions. The results indicate that a fully biomass-based setup, capable of eliminating fossil fuel use through self-generated electricity, can reduce energy-related CO<sub>2</sub> emissions by 80%. However, the viability of this solution is constrained by the substantial biomass requirement (c.a. 57 kt/y), necessitating significant storage and handling capacities. Considering biomass-based solutions as a partial alternative appears more viable, due to the balance between construction costs, logistical demand, and natural gas consumption reduction. These solutions achieve CO<sub>2</sub> emissions reductions ranging from 12% to 45%, using only 13%–33% of the biomass required for a full system replacement. The impact of the innovative layouts investigated in this study is projected on the district of Lucca, one among the main tissue paper district at EU level (18% of EU tissue paper output). The replacement of natural gas with bioenergy could achieve −227 kt<sub>CO2</sub>/y, but this approach would lead to an non sustainable forestry wood biomass consumption (estimated around 93% of the local potential). Moreover, reasonable payback time requires biomass costs to range between 22 and 31 €/MWh which is challenging in Italy but may be viable in Northern European countries where biomass is cheaper and bioenergy exploitation is more common. Therefore, the economic analysis indicates significant feasibility risks in introducing bioenergy to reduce natural gas for use in heating systems. Nonetheless, in the short term, this solution is competitive compared to other decarbonization strategies, including direct electrification.</div></div>","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"495 ","pages":"Article 145014"},"PeriodicalIF":9.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435211","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}
引用次数: 0
Comparing fuels and emission reduction technologies for sustainable shipping: A sustainability index weighting life cycle emissions and costs
IF 9.7 1区 环境科学与生态学
Journal of Cleaner Production Pub Date : 2025-02-17 DOI: 10.1016/j.jclepro.2025.145037
Elias Altarriba , Sirpa Rahiala , Taru Tanhuanpää , Annukka Lehikoinen
{"title":"Comparing fuels and emission reduction technologies for sustainable shipping: A sustainability index weighting life cycle emissions and costs","authors":"Elias Altarriba ,&nbsp;Sirpa Rahiala ,&nbsp;Taru Tanhuanpää ,&nbsp;Annukka Lehikoinen","doi":"10.1016/j.jclepro.2025.145037","DOIUrl":"10.1016/j.jclepro.2025.145037","url":null,"abstract":"<div><div>Maritime transport produces close to 3% of global greenhouse gas emissions. Furthermore, other maritime transport emission compounds degrade air quality, which can significantly affect human health, especially near populated areas. A variety of non-fossil fuel products and technical solutions designed to reduce emissions are currently available on the market. However, the associated investments and operating costs are highly dependent on a number of factors, including the specific operating profile and sailing environment, as well as the regional regulatory framework and economic trends. For ship owners seeking an environmentally sustainable solution that is also economically viable, a multidisciplinary decision-making process is required. To facilitate decision-making, we present an Excel-based analysis model (the Multi-Criteria Sustainability Index Model, or MCSIM) for comparing the environmental effects of various fuels (heavy fuel oil, marine gas oil, liquefied natural gas), nitrogen oxide abatement systems (selective catalytic reduction, exhaust gas recirculation, water in fuel systems), and sulfur scrubbers (open and closed loop). The comparison is based on life cycle emission analysis (well-to-wake), combined with investment and maintenance cost estimates. As the assessment endpoint, we apply a sustainability index consisting of environmental and economic sub-indexes. The environmental index encompasses a range of factors, including global warming, acidification, eutrophication, and human health. This paper introduces the key features of the model and illustrates its application in eight scenarios. While the scenarios presented are situated in the Baltic Sea environment, the model is applicable in a variety of geographical areas. Built on Excel, the model allows users to create their own scenarios, make modifications, and gain familiarity with the calculation routines, thereby ensuring transparency in the calculation process.</div></div>","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"495 ","pages":"Article 145037"},"PeriodicalIF":9.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantitative Text Analysis of Circular Economy Policies for Electric Vehicle Batteries in China: Focus on Objectives and Tools
IF 11.1 1区 环境科学与生态学
Journal of Cleaner Production Pub Date : 2025-02-17 DOI: 10.1016/j.jclepro.2025.145021
Wenhao Sun, Shuhan Hu, Lei Shen
{"title":"Quantitative Text Analysis of Circular Economy Policies for Electric Vehicle Batteries in China: Focus on Objectives and Tools","authors":"Wenhao Sun, Shuhan Hu, Lei Shen","doi":"10.1016/j.jclepro.2025.145021","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.145021","url":null,"abstract":"<h2>Section snippets</h2><section><section><h2>Methodology</h2>This study conducted a quantitative analysis on the selected policy texts regarding EV battery CE by combining topic extraction and content analysis.Topic extraction is the process of identifying the underlying topics within a collection of documents using probabilistic models, such as Latent Dirichlet Allocation (LDA) (Blei et al., 2003). It is widely applied in policy text analysis to uncover policy themes and priorities, construct networks that reveal the relationships and evolution of</section></section><section><section><section><h2>Policy developmental phases</h2>The development of China’s CE policies for EV battery, based on the distribution of policy quantity and type over time (See Fig. 2), can be divided into three phases: (1) 2012-2014: Exploratory Phase, (2) 2015-2017: Guidance Phase, and (3) 2018-2023: Rapid Development Phase.In 2012, the central policy of <em>“Energy Saving and New Energy Automobile Industry Development Plan (2012-2020)”</em> mentioned EV battery recycling for the first time in China. During 2012-2014, EV battery recycling was only</section></section></section><section><section><h2>Policy recommendations</h2>Based on the content analysis results of EV battery CE policies in China, we proposed the following policy recommendations:</section></section><section><section><h2>Conclusions</h2>Drawing on text mining results from LDA model, we developed a two-dimensional analytical framework on ‘objective’ and ‘tool’ to quantitatively analyze EV battery CE policies at both central and local levels in different phases, using 266 documents from 2012 to 2023. Our analysis reveals that China’s EV battery CE policies have evolved through three phases: Exploratory (2012–2014), Guidance (2015–2017), and Rapid development (2018–2023), with increasing focus on systematic frameworks</section></section><section><section><h2>Uncited reference</h2>Forward-looking Industry Research Institute, 2024; Green Peace Organization &amp; All-China Environment Federation, 2020; Li et al., 2021; Liu et al., 2023; New energy storage project Management Code, 2021; Regulation 2023/1542, 191 OJ L, 2023; O et al., 2010; Qian, 2024; Zhang et al., 2020; Zhang et al., 2023.</section></section><section><section><h2>Declaration of Competing Interest</h2>☒ The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.</section></section><section><section><h2>Acknowledgements</h2>We thank anonymous reviewers for their valuable suggestions to improve the quality of the paper. This research is funded by the National Natural Science Foundation of China (Grant Number 42371310); the Key program of International Cooperation, Bureau of International Cooperation, Chinese Academy of Sciences (Grant number 131551KYSB20210030)</section></section>","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"12 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427146","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}
引用次数: 0
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