Waste management最新文献_第6页

Enhanced copper extraction from waste printed circuit boards using glycine after supercritical methanol pre-treatment: Process optimization, leaching kinetics, and thermodynamic analysis 超临界甲醇预处理后用甘氨酸从废弃印刷电路板中提取铜：工艺优化、浸出动力学和热力学分析。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-01 DOI: 10.1016/j.wasman.2024.12.037

Rima Kumari , Roshan Prabhakar , Sukha Ranjan Samadder

{"title":"Enhanced copper extraction from waste printed circuit boards using glycine after supercritical methanol pre-treatment: Process optimization, leaching kinetics, and thermodynamic analysis","authors":"Rima Kumari , Roshan Prabhakar , Sukha Ranjan Samadder","doi":"10.1016/j.wasman.2024.12.037","DOIUrl":"10.1016/j.wasman.2024.12.037","url":null,"abstract":"<div><div>The disposal of waste-printed circuit boards (WPCBs) poses significant environmental and health risks, as they are a major component of e-waste containing hazardous materials. However, WPCBs also contain valuable metallic elements, making them important resources for recycling. To address the dual challenge of hazardous waste management and resource recovery, sustainable approaches for metal extraction from WPCBs are imperative. The present study, thus aimed to explore the use of glycine as an environment-friendly alternative to conventional inorganic acid-leaching agents for copper extraction from WPCBs. The integration of glycine leaching with pre-treatment under supercritical conditions with methanol enhanced the copper liberation efficiency along with improved mass transfer processes. Under optimized conditions of 0.5 M glycine concentration, 5 % (v/v) H<sub>2</sub>O<sub>2</sub> concentration, 1.5:100 g/mL solid-to-liquid ratio, and 40 °C temperature, a remarkably high copper extraction efficiency of 97.46 % was achieved within a 15 h leaching duration. Besides, the kinetic studies indicated a mixed-controlled reaction mechanism for the metal extraction process, with a calculated activation energy of 40.01 kJ/mol. Additionally, a thorough characterization of the recovered metal-leached salt provided insights into the compound’s nature and leaching mechanism. This integrated approach developed thus offers a sustainable and environment-friendly method for reducing the hazardousness of WPCBs while simultaneously extracting valuable metals, contributing to the advancement of e-waste management practices and environmental sustainability.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 551-560"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142928311","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 废玻璃回收无水清洗过程中铁对二氧化碳减排和甲基丙烯酸甲酯生成的作用机理

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-01 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":"10.1016/j.wasman.2024.11.042","url":null,"abstract":"<div><div>Reducing CO<sub>2</sub> 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, CO<sub>2</sub> 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 CO<sub>2</sub> 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 CO<sub>2</sub> and methyl methacrylate production. This paper is the first time to report the mechanisms and approaches for reducing CO<sub>2</sub> emission and controlling gaseous pollutant in waste glass recycling.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 62-69"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","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 废印刷电路板高温快速热解气体释放及碳结构演化研究。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-01 DOI: 10.1016/j.wasman.2024.11.041

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

{"title":"Research on high-temperature fast pyrolysis of waste printed circuit boards for gas release and carbon structure evolution","authors":"Yunfeng Zhu , Bo Li , Yonggang Wei , Shiwei Zhou , Hua Wang","doi":"10.1016/j.wasman.2024.11.041","DOIUrl":"10.1016/j.wasman.2024.11.041","url":null,"abstract":"<div><div>Pyrometallurgy has proven to be a highly effective method for the large-scale recycling of waste printed circuit boards (WPCB) in industrial settings. This study focused on the fast pyrolysis characteristics of WPCB at smelting temperatures and characterized the gas product release behavior and solid product features in detail. The results indicate that the pyrolysis gas was mainly composed of H<sub>2</sub>, CH<sub>4</sub> and CO, and the maximum yield of pyrolysis gas was obtained at 1300 °C, which was 233.66 mL/g. The retention of copper and tin decreased from 98.61 % and 92.39 % to 87.98 % and 70.66 %, respectively, when the temperature increased from 800 °C to 1300 °C. The structure of the glass fibers in the WPCB remained invariant, whereas the carbon fraction progressively tended to graphitize. The results of Py–GC/MS analysis indicate that high temperatures and extended residence times were more favorable for the formation of small molecules such as alkenes and aromatics and inhibited the production of brominated contaminants.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 84-94"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789659","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

Co-gasification of blast furnace dust with petcoke for sustainable waste management 高炉粉尘与石油焦共气化的可持续废物管理。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-01 DOI: 10.1016/j.wasman.2024.12.027

Rakesh Saini, Danda Srinivas Rao, Santosh Deb Barma

{"title":"Co-gasification of blast furnace dust with petcoke for sustainable waste management","authors":"Rakesh Saini, Danda Srinivas Rao, Santosh Deb Barma","doi":"10.1016/j.wasman.2024.12.027","DOIUrl":"10.1016/j.wasman.2024.12.027","url":null,"abstract":"<div><div>This study employed a lab-scale fluidized bed steam gasification setup to perform the co-gasification experiments with blast furnace dust (BFD) and petcoke (PC) − wastes from the steel and refining industries, respectively. Multiple experiments were conducted at the optimized conditions to decipher the effects of the mineralogical content of the feed samples on the gasification performance parameters. With the addition of iron and zinc-abundant BFD sample to PC, an effective enhancement in the ability of the gasifier to produce hydrogen-rich synthesis gas was observed, attributed to an increase in surface active sites for gasification reactivity. An increase of almost 3% and 12 % in cold gas and carbon conversion efficiencies, respectively, was attributed to the catalytic effect of iron and zinc-containing phases in the product ash, resulting in a positive surge in the heating values and the product gas yields. To decipher the catalytic effect, the feed and product samples were characterized by employing analytical techniques of XRF, XRD, TGA, FTIR, SEM techniques with EDX analysis. The co-gasification product ash sample showed the formation of different zinc and iron dominating minerals, such as franklinite (ZnFe<sub>2</sub>O<sub>4</sub>), zincite (ZnO), hematite (Fe<sub>2</sub>O<sub>3</sub>), and magnetite (Fe<sub>3</sub>O<sub>4</sub>), to cater the needs of the growing world mineral demands, as a secondary mineral resource. This work exhibited a novel method to utilize industry wastes with the simultaneous removal of toxic substrates. Overall, potential energy recovery from industrial by-products was highlighted, providing insights towards developing a sustainable waste management technology with scalable prospects of a circular industrial economy.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 506-516"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142915789","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

Isolation and characterization of cellulose from spent ground coffee (Coffea Arabica L.): A comparative study 从废咖啡（Coffea Arabica L.）中分离和表征纤维素：比较研究。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-01 DOI: 10.1016/j.wasman.2024.11.048

Yasemin SEKİ

{"title":"Isolation and characterization of cellulose from spent ground coffee (Coffea Arabica L.): A comparative study","authors":"Yasemin SEKİ","doi":"10.1016/j.wasman.2024.11.048","DOIUrl":"10.1016/j.wasman.2024.11.048","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 54-61"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","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

Enhancing mesophilic methanogenesis in oleate-rich environments through optimized micro-aeration pretreatment 优化微曝气预处理促进富油酸环境中中温产甲烷。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-01 DOI: 10.1016/j.wasman.2024.12.005

Xiang Li , Yi-Juan Yan , Hong-Ming Wu , Samir Ibrahim Gadow , Hongyu Jiang , Zhe Kong , Yong Hu

{"title":"Enhancing mesophilic methanogenesis in oleate-rich environments through optimized micro-aeration pretreatment","authors":"Xiang Li , Yi-Juan Yan , Hong-Ming Wu , Samir Ibrahim Gadow , Hongyu Jiang , Zhe Kong , Yong Hu","doi":"10.1016/j.wasman.2024.12.005","DOIUrl":"10.1016/j.wasman.2024.12.005","url":null,"abstract":"<div><div>Micro-aeration pretreatment has emerged as a promising technology for improving the performance of anaerobic bioreactors in the treatment of lipid-rich organic waste, particularly in mitigating the accumulation of long-chain fatty acids (LCFAs). Micro-aeration intensity is a critical factor in optimizing substrate hydrolysis and methanogenesis efficiency. In this study, optimal micro-aeration intensities for acetoclastic (30 mL-air/g-COD) and overall methanogenesis (7.5 mL-air/g-COD) were initially determined using acetate and glucose as substrates, respectively. Subsequently, the addition of 0.5 mM oleate (a typical LCFA) increased cumulative methane production by 22.1 % when acetate was used as the substrate after 30 mL-air/g-COD micro-aeration pretreatment. Conversely, it decreased cumulative methane production by 17.3 % when glucose was used as the substrate after 7.5 mL-air/g-COD micro-aeration pretreatment. Additionally, the population of facultative hydrolysis microorganisms, such as the genus <em>Pseudomonas</em>, increased by 25.7 % and 27.8 % when acetate and glucose were used as substrates, respectively. Furthermore, the predominant methane-producing archaea, including the genus <em>Methanosarcina</em>, increased by 27.3 % when acetate was used as the substrate, while the genus <em>Methanosaeta</em> decreased by 65.3 % when glucose was used as the substrate. Collectively, these findings provide insights into the methanogenesis pathway under optimal micro-aeration pretreatment conditions, guiding future research in this field.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 171-179"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142814478","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

Evaluation of thermal parameters with geothermal energy recovery from a cold climate municipal solid waste landfill 冷气候城市生活垃圾填埋场地热能回收的热参数评价。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-01 DOI: 10.1016/j.wasman.2024.11.040

Vladimir Buelvas , Logan Morhart , Tyler Casavant , Ian Fleming , Claudio Mahler

{"title":"Evaluation of thermal parameters with geothermal energy recovery from a cold climate municipal solid waste landfill","authors":"Vladimir Buelvas , Logan Morhart , Tyler Casavant , Ian Fleming , Claudio Mahler","doi":"10.1016/j.wasman.2024.11.040","DOIUrl":"10.1016/j.wasman.2024.11.040","url":null,"abstract":"<div><div>This study presents finite element method (FEM) modeling with COMSOL Multiphysics to estimate the thermal properties of a waste landfill through back-analysis of temperature responses from buried thermistors during a full-scale multi-week active thermal response test. Field tests were conducted at the Loraas MSW landfill in Saskatoon, Canada, using instrumented equipment, including a vertical borehole heat exchanger and thermistor strings. The test consisted of two phases: a heat injection test during the summer and a heat extraction test in the winter. The study focused on a landfill 25 m deep, observing temperature changes at various depths over time. The effect of heat generation rate (HGR) on landfill temperature was investigated. Thermal conductivity and volumetric heat capacity increase with depth, with close alignment between summer and winter results, validating the tests. This research enhances the understanding of thermal parameters in MSW landfills by combining field tests and numerical modeling, offering insights into landfill behavior in cold climates. These findings hold significance for optimizing geothermal energy recovery from such landfills, calibrating thermal parameters for coupled models in landfills, and improving waste management practices.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 11-22"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142781280","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 超越垃圾填埋场：报废聚氯乙烯（PVC）增值技术的重要回顾。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-01 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":"10.1016/j.wasman.2024.11.023","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 105-134"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","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":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of SS 316L particle-infilled PLA composite filaments from cast-off bi-material extrudates for 3D printing applications 用废弃的双材料挤出物制造SS 316L颗粒填充PLA复合长丝，用于3D打印应用。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-01 DOI: 10.1016/j.wasman.2024.12.021

Siva Prasad Tadi, Ravi Sankar Mamilla

{"title":"Fabrication of SS 316L particle-infilled PLA composite filaments from cast-off bi-material extrudates for 3D printing applications","authors":"Siva Prasad Tadi, Ravi Sankar Mamilla","doi":"10.1016/j.wasman.2024.12.021","DOIUrl":"10.1016/j.wasman.2024.12.021","url":null,"abstract":"<div><div>The identification of recyclable resources are extremely important to balance the growing demand for polymer composite 3D printing and sustainable manufacturing. In the present study, SS 316L powder particle infused PLA filaments are fabricated by deriving PLA from discarded bi-material extrudates, adopting solvent mixing methodology. The matrix reclaimability, composite feedstock fabrication, extrudability and printability are investigated by increasing the solid loading from 10 – 40 wt%. Outcomes of the FTIR for ‘PLA gel’ and ‘extrudate dissolved gel’ are identical and confirms the matrix reclaimability. Essential characterization studies like XRD, TGA, and DSC are carried out for composite feedstock. The reinforcement dispersion in composites is quantified with the help of microscopy results. The melt rheological studies reveal that all the extruded filaments exhibit shear thinning over a shear rate of 50 s<sup>−1</sup> and are compatible with 3D printing. The tensile strength is improved by 22.4% after adding 10 wt% reinforcement to the recycled PLA. The economical benefits are evaluated by comparing the composite filament fabrication with the pure PLA matrix. The study concludes recommending viscous modifiers to improve filament processability and increase loading capacity beyond 40 wt% for indirect metal additive manufacturing.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 386-397"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142871822","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

Secondary aluminum dross self-heating enhances hazardous waste vitrification 二次铝渣自热增强了危险废物的玻璃化。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-01 DOI: 10.1016/j.wasman.2024.12.026

Yuyang Long , Yuhe Song , Xitong Wang , Xiaohui Sun , Zhengdong Peng , Dongsheng Shen , Ying Kang , Foquan Gu

{"title":"Secondary aluminum dross self-heating enhances hazardous waste vitrification","authors":"Yuyang Long , Yuhe Song , Xitong Wang , Xiaohui Sun , Zhengdong Peng , Dongsheng Shen , Ying Kang , Foquan Gu","doi":"10.1016/j.wasman.2024.12.026","DOIUrl":"10.1016/j.wasman.2024.12.026","url":null,"abstract":"<div><div>This study demonstrates the potential of secondary aluminum dross (SAD) to enhance the vitrifying hazardous waste incineration fly ash (FA) and bottom slag (BS). Based on the CaO-SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> ternary phase diagram, a liquid phase can be achieved at relatively low temperatures by carefully adjusting the Al<sub>2</sub>O<sub>3</sub> content, particularly when the CaO to SiO<sub>2</sub> ratio is around 0.66. Theoretical melting temperature calculations indicate that substituting Al<sub>2</sub>O<sub>3</sub> reagent with SAD enables the vitrification of FA and BS at temperatures below 1300 °C. TG-DSC results confirm this theoretical prediction, showing that the mixed system of FA, BS, and SAD lowers the liquid-phase formation temperatures compared to FA, BS, and SAD individually. Vitrification experiments, employing a composition of 55 wt%–60.5 wt% FA, 34 wt%–39 wt% BS, and 0.5 wt%–11 wt% SAD, achieved successful vitrification at 1350 °C for 2 h. This resulted in a high-quality vitrified product with a vitreous content exceeding 87.38%, an acid dissolution loss ratio below 2.32%, and heavy metals leaching toxicity below 0.15 mg/L. The exothermic nature of aluminum in SAD during the melting process contributes to enhance vitrification, making SAD a promising alternative to Al<sub>2</sub>O<sub>3</sub> reagent.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 453-461"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142898611","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