{"title":"Recycling and recyclability index for end-of-life vehicle jeepneys in the Philippines","authors":"Noemi B. Torre, Edwin L. Olmos","doi":"10.1007/s10163-024-02086-3","DOIUrl":"10.1007/s10163-024-02086-3","url":null,"abstract":"<div><p>The Philippine government launched its Public Utility Vehicle Modernization Program last 2017 to modernize the country’s public transportation system. Part of this program is a sustainable scrappage scheme to handle about 200,000 jeepneys when they are eventually replaced by modern transportation units. In order to provide a technical basis for this scheme, a university-based research team dismantled a typical public utility jeepney. After weighing and classifying the different parts, the jeepney was found to be composed of about 80.44% by weight of ferrous metal alloys while the balance consisted of aluminum, copper, rubber, plastic, wood and oil-based fluids. The jeepney’s recyclability index of 92.50% and the recoverability index of 93.48% were determined for the first time using the International Organization for Standardization (ISO) 22,628 criteria. Using the available junkshop prices, the jeepney’s estimated scrappage value of about Php30,000 was assumed when the preliminary feasibility study of a proposed scrappage facility with a capacity of 15,600 units per year was conducted.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 1","pages":"91 - 101"},"PeriodicalIF":2.7,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Wenwen Cui, Xiaoqiang Dong, Gaole He, Ruiyang Zhao, Jiajiang Liu
{"title":"Material properties and environmental implications of red mud solidified with blast-furnace slag, silica fume, and sodium hydroxide","authors":"Wenwen Cui, Xiaoqiang Dong, Gaole He, Ruiyang Zhao, Jiajiang Liu","doi":"10.1007/s10163-024-02097-0","DOIUrl":"10.1007/s10163-024-02097-0","url":null,"abstract":"<div><p>Red mud, an alkaline waste from bauxite refining, takes up land and poses environmental risks from its storage. This study examines red mud treatment, assessing blast furnace slag (GGBS), silica fume (SF), and sodium hydroxide (SH) for solidification. Tests show a mix of 79% red mud, 15% GGBS, 3% SF, and 3% SH yields a 28-day compressive strength of 13.12 MPa, suitable for industrial materials. Solidified red mud’s resistivity rises and permeability drops over time, enhancing impermeability and compactness. Durability tests through seven wet-dry and freeze–thaw cycles show solidified red mud’s excellent durability, with mass loss below 2% and compressive strength over 9.67 MPa. Scanning Electron Microscopy and Energy Dispersive Spectroscopy show solidified red mud is filled with Calcium-Alumino-Silicate-Hydrate gel and ettringite crystals, reducing porosity and improving particle bonding. X-ray diffraction and Mercury Intrusion Porosimetry tests confirm their even distribution within the mud. Environmental analysis shows solidified red mud reduces heavy-metal leaching and stabilizes radioactive nuclides. Life-cycle assessment indicates it cuts carbon footprint by about 45.23% compared to traditional cement, highlighting sustainability and economic advantages. In summary, the study validates that GGBS, SF, and SH enhance red mud’s environmental performance, offering new paths for sustainable industrial waste utilization.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 1","pages":"142 - 158"},"PeriodicalIF":2.7,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"Effect of desulphurization gypsum on hardening mechanism of the geopolymer produced with steel slag and granulated blast furnace slag","authors":"Weixin Zheng, Jinmei Dong, Jing Wen, Chenggong Chang, Yuanrui Li, Qiang Wang","doi":"10.1007/s10163-024-02099-y","DOIUrl":"10.1007/s10163-024-02099-y","url":null,"abstract":"<div><p>Desulphurization gypsum (DG) is the by-product of wet desulphurization of flue gas in power plant, with a large yields and low resource utilization rate. However, it is rich in CaSO<sub>4</sub>·2H<sub>2</sub>O. This work reused the DG for the activation of steel slag (SS)-alkalied-granulated blast furnace slag (GBFS) and produced a DG–SS–GBFS-based geopolymer. The compressive strength, dehydrated polymeric products and their generation and micromorphology, and pozzolanic activity were studied. Results show that the DG–SS–GBFS-based geopolymer produced with 15 wt.% DG, 51 wt.% SS and 34 wt.% GBFS is 1.20 MPa and 14.66 MPa at 3 and 28 days, which is increased by 990.91% and 18.13% compared to that without DG; this increase is attributed to the fibrous AFt formed in the DG–SS–GBFS-based geopolymer. Also, the C-A-S-H gel and Ht phase were generated. The produced geopolymer’s pozzolanic activity is 84.19% (> 65.00% in accordance with GB/T 2847–2005 “Pozzolanic materials of Portland cement”) at 28 days, and no more than 30 wt.% of the DG–SS–GBFS-based geopolymer can be applied to the production of 42.5-grade composite cement specified in the GB 175–2020 “common Portland cement”. This work contributes to the reuse of DG on a large scale, which fits well with the concept of cleaner production.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 1","pages":"159 - 169"},"PeriodicalIF":2.7,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"Effect of salinity on anaerobic fermentation gas production behaviors of the thermal pretreated fruit waste","authors":"Wenhao Sun, Hua Wang, Xinmin Zhang, Xuyang Li, Weihua Cheng","doi":"10.1007/s10163-024-02089-0","DOIUrl":"10.1007/s10163-024-02089-0","url":null,"abstract":"<div><p>The impact of salinity levels (0 g/L,5 g/L,10 g/L,15 g/L,20 g/L, and 25 g/L) on the production of combustible gases from anaerobic fermentation of fruit pomace waste with thermal pretreatment. The underlying mechanisms behind this effect are also be analyzed. The experimental findings reveal that the production of gas from anaerobic fermentation of fruit pomace waste is significantly inhibited under high salt conditions (NaCl ≥ 5 g/L). Specifically, the gas production of the experimental groups with salinity ranging from 15 g/L to 25 g/L is about 79% of that observed in the blank group (without adding NaCl). In addition, high salinity also delays the start of fermentation. Consistent with the experimental data, the Gompertz model simulations reveal that increasing the salt concentration prolongs the fermentation period. Notably, the experimental group with salt concentration of 20–25 g/L is subjected to an 11-h delay, yet this prolongation does not disrupt the 24-h fermentation completion cycle. The high salinity inhibits the total amount of hydrogen in the fruit pomace waste gas production, but it has little effect on the proportion of hydrogen in the gas production. Salinity affects the production of various volatile fatty acids, including acetic, propionic, and butyric acids, without altering the overall composition of short-chain fatty acids. The study shows that high salinity inhibits the consumption of organic matter during the fermentation process of fruit waste, reduce the production of H<sub>2</sub>, and notably delays in the onset of fermentation.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 1","pages":"102 - 110"},"PeriodicalIF":2.7,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"Recovery of samarium and cobalt/iron oxide from SmCo magnets through acid baking and water leaching","authors":"Elif Emil-Kaya, Xi Lu, Bernd Friedrich","doi":"10.1007/s10163-024-02096-1","DOIUrl":"10.1007/s10163-024-02096-1","url":null,"abstract":"<div><p>Rare earth elements (REEs) and cobalt (Co) are listed as critical raw materials because of their importance in global industrial production growth, high supply risk, and economic significance. The recovery of Co and REEs from secondary resources is therefore proposed as a key countermeasure to address this concern. In this study, a straightforward process that integrates acid baking and water leaching is proposed for the recovery of samarium (Sm) and Co from scrap SmCo magnets. Firstly, the chemical composition of SmCo magnets is revealed by ICP-OES and XRF. The Taguchi experimental design technique is employed to optimize nitric acid baking and water leaching. Based on the thermal decomposition behavior of Co, Fe, and Sm, the acid baking temperature is studied for the conversion of metal nitrates, excluding REEs nitrates, into metal oxides. The optimal conditions for acid baking and water leaching are identified, and a reactor for the pilot-scale acid baking process is proposed. The optimum parameters are tested with the proposed reactor.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"26 6","pages":"3905 - 3916"},"PeriodicalIF":2.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10163-024-02096-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"Lactic acid-fermented by-product of Shochu distillery reduces anxiety behavior in Neuropeptide Y knockout zebrafish by the regulation of isotoin neuron","authors":"Momoka Hibarino, Eri Aoki, Yurina Kubo, Haruri Nagata, Sayaka Tateno, Kenzo Sakaguchi, Hirofumi Kawaji, Kazuhiro Shiozaki","doi":"10.1007/s10163-024-02092-5","DOIUrl":"10.1007/s10163-024-02092-5","url":null,"abstract":"<div><p>The development of techniques to reduce stress in the aquaculture industry is essential for the good growth, low mortality, and high flesh quality of farmed fish. Shochu is a traditional Japanese alcoholic beverage, and the disposal of large amounts of Shochu lees waste has been a problem. As Shochu lees contain low-molecular-weight compounds, which are thought to have health benefits, the lactic acid-fermented by-product of Shochu distillery (FBPSD) was tested to estimate its anti-stress effects in neuropeptide Y-knockout zebrafish (NPY-KO), which exhibit high anxiety and low sociability, as a farmed fish model.</p><p>In the Black-White preference test, NPY-KO preferred the black area over the white area due to fear, whereas NPY-KO fed the FBPSD showed a higher preference for the white area with more swimming distance than the control group. In the 3-chambers test, NPY-KO showed low sociability with the unfamiliar zebrafish group, whereas FBPSD-fed NPY-KO showed high sociability with the group. The mRNA level of isotocin, the homologue of human oxytocin, was significantly increased in the brains of FBPSD-fed zebrafish. The oxytocin receptor antagonists L-368,899 attenuated the effects of FBPSD in the 3-chambers test. These results suggest that FBPSD attenuates anxiety in NPY-KO zebrafish by activating isotocin neurons.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"26 6","pages":"3852 - 3863"},"PeriodicalIF":2.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10163-024-02092-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"Circular economy in fashion: consumer awareness and lifestyle, and environmental impact on second-hand clothes","authors":"Xiaqing Chen, Tomohiro Tabata","doi":"10.1007/s10163-024-02091-6","DOIUrl":"10.1007/s10163-024-02091-6","url":null,"abstract":"<div><p>This study aimed to identify the benefits and challenges of clothing reuse, both in terms of fashion companies collecting unwanted clothing and consumer attitudes, focusing on Japanese fashion companies and consumers To achieve the goal, this study conducts a survey to gain an overview on the supply chain of fashion brands carrying out a take-back program in Japan. This study also conducted a questionnaire survey to gage consumers’ awareness and purchasing decisions regarding second-hand clothes and to clarify the annual CO<sub>2</sub> emissions generated by different clothing maintenance habits among second-hand clothes consumers. Business review results revealed that large companies only take back their products for reuse or recycling to control product quality. The questionnaire survey results revealed the primary motivations for purchasing second-hand clothes were financial advantages and the desire for fashionable styles. The environmental impact assessment results indicated that purchasing a second-hand shirt in the context of a circular economy produces 6.71 kg-CO<sub>2</sub> less than buying a newly produced shirt within a linear economy (9.23 kg-CO<sub>2</sub>). Additionally, based on the questionnaire results, this study unveiled how laundry habits affect CO<sub>2</sub> emissions during the garment use phase.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"26 6","pages":"3876 - 3892"},"PeriodicalIF":2.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Keqian Zhu, Wenjian Wang, Zhenxu Wang, Junliang Lin, Huliang Zhuang, Tao Sun
{"title":"Simulating the trajectory of conductive particles in positive high-voltage electrostatic separators and optimizing parameters","authors":"Keqian Zhu, Wenjian Wang, Zhenxu Wang, Junliang Lin, Huliang Zhuang, Tao Sun","doi":"10.1007/s10163-024-02088-1","DOIUrl":"10.1007/s10163-024-02088-1","url":null,"abstract":"<div><p>To enhance the sorting efficiency of electrostatic separation for various conductive particles, a numerical model for the trajectory of conductive particles under the combined electric and gravitational fields was established. Initially, the distribution of the spatial electric field was analyzed using COMSOL Multiphysics, followed by the development of a program in MATLAB to calculate particle trajectories. The effects of particle size, voltage, angular velocity of the grounding roller, and the distance from the collection trough to the center of the grounding roller on the sorting efficiency of conductive particles (with radii larger than 1 mm) under positive high-voltage conditions were examined. Then the single-factor changing method and the response surface methodology were used to optimize the above parameters. The results showed that there was an inflection point for the angular velocity of the grounding roller; below this point, the sorting efficiency increased with the angular velocity, but beyond it, the efficiency decreased as the angular velocity continued to increase. Additionally, after the response surface methodology was used to optimize the parameters, the sorting efficiency was increased by 9 times. This study provides a theoretical foundation for the design and parameter control of new electrostatic separators.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"26 6","pages":"3864 - 3875"},"PeriodicalIF":2.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"Sustainable solution selection for solid waste incineration fly ash: a multicriteria framework based on objective weights and fusion ranks","authors":"Di Xu","doi":"10.1007/s10163-024-02082-7","DOIUrl":"10.1007/s10163-024-02082-7","url":null,"abstract":"<div><p>Fly ash (FA), a byproduct of municipal solid waste incineration (MSWI), poses significant hazards to urban development, necessitating its sustainable treatment. This study proposes a systematic decision support tool to identify the most sustainable MSWI FA treatment technology among various options, considering diverse criteria. The research introduces a hybrid Multi-Criteria Decision-Making (MCDM) framework integrating the Grey Relational Coefficient (GRC) into the Analytical Network Process (ANP) for objective criterion weighting. Additionally, a Projection-based Programming (PbP) approach enhances the reliability of ranking MSWI FA treatment alternatives by reconciling disparate sequences from different MCDM techniques. This work pioneers the early application of MCDM methods in prioritizing sustainable MSWI FA treatment, offering two crucial mathematical contributions. Firstly, the GRC-ANP method objectively assigns weights by capturing statistical relationships among criteria. Secondly, the PbP approach consolidates varied MCDM outcomes to provide a reliable ranking. Testing five technologies against eight sustainability criteria validates the robustness and effectiveness of the framework, affirming its potential in aiding decision-making for sustainable MSWI FA treatment solutions.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"26 6","pages":"3811 - 3823"},"PeriodicalIF":2.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Rodolfo Daniel Silva Martínez, Lourdes Díaz Jiménez, Oscar Aguilar Juárez, Salvador Carlos Hernández
{"title":"Characterization of municipal solid waste with the perspective of biofuels and bioproducts recovery in Northeast Mexico","authors":"Rodolfo Daniel Silva Martínez, Lourdes Díaz Jiménez, Oscar Aguilar Juárez, Salvador Carlos Hernández","doi":"10.1007/s10163-024-02069-4","DOIUrl":"10.1007/s10163-024-02069-4","url":null,"abstract":"<div><p>This work focuses on analyzing the physical composition of municipal solid waste (MSW) and the physicochemical characterization of the organic fraction of municipal solid waste (OFMSW) in a city in Northeast Mexico to propose an adequate treatment and valorization system. Diverse samples were analyzed over 5 months at the city of Saltillo landfill, where the daily discarded MSW was classified into household (HW), central market waste (CMW), and public areas and parks waste (PPW). For the HW and CMW, the fraction with the highest proportion was the organic residues from food products, with 22.15 and 25.78%, followed by other organic wastes (manure, yard waste, leaves, etc.) at 12.58 and 10.24%, respectively. Furthermore, the organic fraction was segregated from the rest of the MSW and classified into four subtypes, and their physical composition and physicochemical characteristics were determined. The results contribute to laying the foundations for the proper treatment of the OFMSW not just in the studied region but also in cities with similar conditions. Moreover, the OFMSW’s feasibility in treating via bioenergy technologies is revealed, and this research proposes a biorefinery treatment pathway through dark fermentation followed by high solids anaerobic digestion generating bioenergy and diverse bioproducts.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"26 6","pages":"3665 - 3680"},"PeriodicalIF":2.7,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10163-024-02069-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}