Waste management最新文献_第3页

Advanced recycling and identification system for discarded capacitors utilizing laser-induced breakdown spectroscopy technology.

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-12-09 DOI: 10.1016/j.wasman.2024.11.044

Wenhan Gao, Boyuan Han, Yanpeng Ye, Yuyao Cai, Jun Feng, Yihui Yan, Yuzhu Liu

{"title":"Advanced recycling and identification system for discarded capacitors utilizing laser-induced breakdown spectroscopy technology.","authors":"Wenhan Gao, Boyuan Han, Yanpeng Ye, Yuyao Cai, Jun Feng, Yihui Yan, Yuzhu Liu","doi":"10.1016/j.wasman.2024.11.044","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.11.044","url":null,"abstract":"In the modern electronics industry, with the rapid development of technology and the quick turnover of electronic products, the production of electronic waste (e-waste) has also dramatically increased. Among these, discarded capacitors are a significant component of e-waste. These old capacitors not only contain harmful chemicals but are also rich in economically recoverable precious metals like Nb and Ag. This study specifically aims to enhance the classification of discarded capacitors to enable more efficient recycling and resource recovery.Traditional methods of capacitor classification mainly rely on manual identification, which is inefficient and limited in accuracy. To enhance the efficiency and accuracy of classification, this study introduces, for the first time, the combination of Laser-Induced Breakdown Spectroscopy (LIBS) technology and machine learning for the classification of capacitors. The Backpropagation Artificial Neural Network (BP-ANN) algorithms can be trained to automatically identify and classify discarded capacitors. To achieve better performance, we developed a novel algorithm called the Optimized Feature Extraction Variance Algorithm (OFEVA), which addresses the limitations of existing methods by significantly improving the accuracy of the classification model. Compared to training with principal component scores data from traditional Principal Component Analysis (PCA), training with OFEVA achieves higher classification accuracy and computational efficiency.This innovative approach not only helps increase the recycling rate of discarded capacitors and reduce environmental pollution but also provides significant technical support for the reuse of resources, thereby making an important contribution to the fields of environmental protection and resource recycling. In addition, the spectral lines of pure niobium have been calibrated for the first time in this paper, providing important data for further spectroscopic studies.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"135-142"},"PeriodicalIF":7.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142808039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Beyond the Landfill: A critical review of techniques for End-of-Life Polyvinyl chloride (PVC) valorization.

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-12-09 DOI: 10.1016/j.wasman.2024.11.023

Mohammadhossein Havaei, Oğuzhan Akin, Andrea Locaspi, Robin John Varghese, Florent Minette, Eric Romers, Steven De Meester, Kevin M Van Geem

{"title":"Beyond the Landfill: A critical review of techniques for End-of-Life Polyvinyl chloride (PVC) valorization.","authors":"Mohammadhossein Havaei, Oğuzhan Akin, Andrea Locaspi, Robin John Varghese, Florent Minette, Eric Romers, Steven De Meester, Kevin M Van Geem","doi":"10.1016/j.wasman.2024.11.023","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.11.023","url":null,"abstract":"Polyvinyl chloride (PVC) is a polymer comprised of more than 50% chlorine that offers unmatched versatility at low expense. PVC is irreplaceable in several applications, such as construction materials, medical applications, and cables. This versatility and tunable properties come at the cost of complex formulations for the product and challenging end-of-life (EoL) options for PVC waste. Pure collected and sorted PVC is already recycled successfully to some extent, yet, when PVC ends up in a mixed plastic waste stream, it can be detrimental to the recycling process. PVC waste and its effects at various concentrations remain a focal point for both scholars and policymakers. In this review, the narrative begins at the naissance of PVC and continues to investigate the EoL valorization options when the products are inevitably discarded. Strategies for PVC waste recycling and the technical and legal challenges regarding each method are discussed, focusing on the European recycling market. An effective solution to handle EoL PVC requires a combination of policies and schemes for proper collection and sorting of specific waste streams and considering all available technologies to select the right tools. This review can support appropriate policies and the selection of suitable methods of recycling PVC waste.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"105-134"},"PeriodicalIF":7.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142808043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Characterization of urban park litter pollution.

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-12-06 DOI: 10.1016/j.wasman.2024.11.047

Loris Pietrelli, Stefania Di Vito, Elisabetta Lacolla, Antonella Piozzi, Elisa Scocchera

{"title":"Characterization of urban park litter pollution.","authors":"Loris Pietrelli, Stefania Di Vito, Elisabetta Lacolla, Antonella Piozzi, Elisa Scocchera","doi":"10.1016/j.wasman.2024.11.047","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.11.047","url":null,"abstract":"Monitoring campaigns to collect and characterize urban park litter have been carried out in Italy annually from 2018 to 2023. A total of 274 urban parks in 108 cities (with 745 inhabitants to 2.7 million) were monitored. The citizen science approach was applied, and each campaign involved yearly an average of 416 volunteers coordinated by Legambiente. An adaptation of the sampling protocol proposed by the Marine Strategy Framework Directive (MSFD) Technical Group on Marine Litter (2008/56/CE) was applied. In total 161,293 (mean value 26,882.2 ± 4,743.4) items were collected within 42,300 m2 (density 3.82 items/m2). Cigarette butts are the most widespread waste: 36.3 % ± 5.5 % and up to 25 butts/m2 were found. Significant amounts of metal (16.2 %), glass/ceramics (13.0 %) and paper/cardboard (10.7 %) were found. Despite the COVID emergency having ended in 2021, during the 2022 monitoring campaign face masks only represent 0.2 % of the total waste items. No correlation was found between the amount of waste and the number of inhabitants or the geographical position of the city. The population density was poorly correlated with the quantity of waste collected while a slight correlation was evidenced by the presence of plastic bottles which seem to have decreased in recent years. Using the FTIR Spectroscopy 19 different polymers were identified. The most common were cellulose acetate (cigarette butts) polyethylene and polypropylene. Following the application of recent SUP regulations, polylactic acid and starch blended biopolymers were found (till 0.3 %). Finally, the presence of highly degraded polymers was observed.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"95-104"},"PeriodicalIF":7.1,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142792439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Aligning priorities: A Comparative analysis of scientific and policy perspectives on municipal solid waste management.

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-12-05 DOI: 10.1016/j.wasman.2024.11.031

Miguel Rodrigues, João Alexandre Antunes, Vera Miguéis

{"title":"Aligning priorities: A Comparative analysis of scientific and policy perspectives on municipal solid waste management.","authors":"Miguel Rodrigues, João Alexandre Antunes, Vera Miguéis","doi":"10.1016/j.wasman.2024.11.031","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.11.031","url":null,"abstract":"Municipal solid waste (MSW) management has become a critical issue today, posing substantial economic, environmental, and social challenges. Identifying and analyzing dominant themes in this field is essential for advancing research and policies towards sustainable MSW management practices. This study aims to explore the key issues related to MSW management that have been addressed by both the scientific community and policymakers through funded projects. By doing so, the study seeks to guide the scientific community as a knowledge producer and the EU as a key funder. Two Latent Dirichlet Allocation (LDA) models were applied to analyze the themes from two corpora: one representing scientific literature and another focusing on EU-funded projects. Additionally, this analysis was complemented by a quantitative estimation of the similarity between the two corpora, providing a measure of alignment between the scientific community and policymakers. The results generally indicate that the two spheres are aligned and highlight the diversity of topics explored by the scientific community. Nevertheless, it is concluded that there are opportunities for further research on specific topics, such as leaching and the extraction of heavy metals. Additionally, the popularity of topics identified in European Union-funded projects has fluctuated considerably over time, focusing primarily on waste management rather than its prevention. In light of these findings, waste prevention emerges as a promising avenue for future EU-funded research initiatives.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"70-83"},"PeriodicalIF":7.1,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Action mechanism of iron on the carbon dioxide emission reduction and methyl methacrylate generation during anhydrous cleaning process for waste glass recovery.

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-12-05 DOI: 10.1016/j.wasman.2024.11.042

Baojia Qin, Chunmu Wang, Jiahua Lu, Jie Zhu, Jujun Ruan

{"title":"Action mechanism of iron on the carbon dioxide emission reduction and methyl methacrylate generation during anhydrous cleaning process for waste glass recovery.","authors":"Baojia Qin, Chunmu Wang, Jiahua Lu, Jie Zhu, Jujun Ruan","doi":"10.1016/j.wasman.2024.11.042","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.11.042","url":null,"abstract":"Reducing CO2 and pollutant emissions is a global priority. Waste glass recycling is more effective in achieving this goal compared to producing new glass. A crucial step in waste glass recycling is removing adhesive impurities from the glass surface. Hydraulic cleaning generates organic wastewater, leading to its gradual replacement in China by anhydrous cleaning, a novel technology that avoids wastewater generation. However, CO2 and pollutant methyl methacrylate are still produced during anhydrous cleaning, and their formation mechanisms were previously unclear. This study explores these mechanisms and finds that the existence of glass interface increases the length of C≡N bond of binder by 0.239 Å, which promotes the bond's fracture and the formation of methyl methacrylate in exhaust gas. Iron in waste glass increases the length of C = O bond by 0.263 Å, facilitating the bond's fracture and reducing the proportions of methyl methacrylate and CO2 by 7.31 % and 18.01 %, respectively. Therefore, it is recommended to modify the existing recycling process of waste glass by arranging iron removal after anhydrous cleaning to reduce CO2 and methyl methacrylate production. This paper is the first time to report the mechanisms and approaches for reducing CO2 emission and controlling gaseous pollutant in waste glass recycling.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"62-69"},"PeriodicalIF":7.1,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Research on high-temperature fast pyrolysis of waste printed circuit boards for gas release and carbon structure evolution.

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-12-05 DOI: 10.1016/j.wasman.2024.11.041

Yunfeng Zhu, Bo Li, Yonggang Wei, Shiwei Zhou, Hua Wang

引用次数: 0

Monitoring of greenhouse gas emissions and compost quality during olive mill waste co-composting at industrial scale: The effect of N and C sources.

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-12-04 DOI: 10.1016/j.wasman.2024.11.039

Ana García-Rández, Luciano Orden, Evan A N Marks, Javier Andreu-Rodríguez, Samuel Franco-Luesma, Encarnación Martínez-Sabater, José Antonio Saéz-Tovar, María Dolores Pérez-Murcia, Enrique Agulló, María Ángeles Bustamante, Maite Cháfer, Raúl Moral

{"title":"Monitoring of greenhouse gas emissions and compost quality during olive mill waste co-composting at industrial scale: The effect of N and C sources.","authors":"Ana García-Rández, Luciano Orden, Evan A N Marks, Javier Andreu-Rodríguez, Samuel Franco-Luesma, Encarnación Martínez-Sabater, José Antonio Saéz-Tovar, María Dolores Pérez-Murcia, Enrique Agulló, María Ángeles Bustamante, Maite Cháfer, Raúl Moral","doi":"10.1016/j.wasman.2024.11.039","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.11.039","url":null,"abstract":"Olive mill wastes (OMW) management by composting allows to obtain valuable fertilizing products, but also implies significant fluxes of greenhouse gases (GHG). For a proper OMW composting, high C- and N co-substrates are necessary, but little is known concerning their effect on GHG emissions in OMW-industrial scale composting. In this study, different co-composting agents (cattle manure (CM), poultry manure (PM), sheep manure (SM) and pig slurry solid fraction (PSSF) as N sources and olive leaves (OLW) and urban pruning residues (UPR) as bulking agents and C sources) were used for OMW composting at industrial scale. Physico-chemical and chemical properties in the composting samples, and GHG (CO2, CH4 and N2O) fluxes were monitored in 12 industrial-scale windrows. GHG emissions were firstly influenced by N source, with the highest accumulated global warming potential (GWP) associated with PM (512 kg CO2eq pile-1), since PM composts were associated with the greatest N2O (0.33 kg pile-1) and CH4 emissions (15.67 kg pile-1). Meanwhile, PSSF was associated with the highest CO2 emissions (1113 kg pile-1). UPR as a bulking agent facilitated 10 % greater mineralization of the biomass than OLW, however this C-source was not associated with higher GHG emissions. The results showed that while mineralization dynamics may be impacted by C sources, GHG emissions were mainly conditioned by the characteristics of nutrient-heavy feedstocks (PM and SM). Moreover, manures as nitrogen-laden co-substrates had widely differing effects on total GWP, and that of individual gases, but further research is necessary to understand the mechanisms explaining such differences.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"33-43"},"PeriodicalIF":7.1,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142787328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Efficient reduction of electric arc furnace dust by CO/H₂ derived from waste biomass: Biomass gasification, zinc removal kinetics and mechanism.

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-12-04 DOI: 10.1016/j.wasman.2024.11.049

Xingnan Huo, Dingzheng Wang, Jinlin Yang, Shaojian Ma

引用次数: 0

Isolation and characterization of cellulose from spent ground coffee (Coffea Arabica L.): A comparative study.

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-12-04 DOI: 10.1016/j.wasman.2024.11.048

Yasemin Seki

{"title":"Isolation and characterization of cellulose from spent ground coffee (Coffea Arabica L.): A comparative study.","authors":"Yasemin Seki","doi":"10.1016/j.wasman.2024.11.048","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.11.048","url":null,"abstract":"This study compares several methods, such as sodium chlorite, nitric acid, and hydrogen peroxide treatments with alkali pre-treatments, for efficiency of extracting cellulose from spent ground coffee. The extracted cellulose was characterized by Fourier transform infrared spectroscopy (FTIR), x-ray diffractometry (XRD), thermogravimetric analysis (TGA), colour analysis, chemical composition, and particle size analysis. FTIR confirmed the removal of non-cellulosic components from coffee, which correlates with chemical composition and colour analysis results. The highest cellulose content (96.7 %) and the highest whiteness index (71.24) were obtained for the cellulose materials extracted using nitric acid-sodium chlorite and sodium chlorite with alkali pre-treatments, respectively. XRD data reveals that the treated coffee presented exhibited a higher crystallinity index compared to the untreated one. The highest increase in crystallinity index (from 54.9 % to 66.3 %) was achieved for the cellulose extracted using a 20 % hydrogen peroxide treatment with alkali pre-treatment. The maximum degradation temperature of the spent ground coffee increased from 292.0 to 310.5 °C after treatment with 10 wt% hydrogen peroxide and alkali pre-treatment. In summary, these findings highlight the great potential of spent ground coffee as a source of cellulose.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"54-61"},"PeriodicalIF":7.1,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142787327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Combination mechanism and dimethyl ether removal performance of organic-bound water in kitchen waste.

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-12-03 DOI: 10.1016/j.wasman.2024.11.046

Jipeng Sun, Wei Zhu, Jun Zhong, Biao Mu, Xin Wang, Xinyi Wang, Yucheng Xu, Jun Cao, Naixi Lin

{"title":"Combination mechanism and dimethyl ether removal performance of organic-bound water in kitchen waste.","authors":"Jipeng Sun, Wei Zhu, Jun Zhong, Biao Mu, Xin Wang, Xinyi Wang, Yucheng Xu, Jun Cao, Naixi Lin","doi":"10.1016/j.wasman.2024.11.046","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.11.046","url":null,"abstract":"Dewatering plays an important role in kitchen waste reduction and resource utilization; however, the mechanism of water combination and removal remains unclear. In this study, dimethyl ether solvent was used to investigate the water occurrence state and dewatering pattern in kitchen waste, and the key organic components, hydrophilic functional groups, and water removal mechanism were clarified. The results showed that all the water existed in the state of organic-bound water, in which proteins were the key organic matters affecting dewatering and the hydrophilic functional groups CO/CN, CO, and amine-N. combined with water through hydrogen bonding were the key mechanisms. Through competition with hydrophilic functional groups, dimethyl ether released 54.83-87.85% of the water to the liquid phase, while the hydrophilic components and hydrophilic functional groups were retained in the solid phase. Simultaneously, the addition of additives verified that enhanced disruption of hydrogen bonding between water and hydrophilic functional groups could improve the dewatering efficiency. It was concluded that more attention should be paid to reducing or disrupting the hydrogen bonding of hydrophilic functional groups on the surface of the solid phase with water to improve the kitchen waste dewatering performance.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"23-32"},"PeriodicalIF":7.1,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142781278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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