Waste management最新文献_第9页

A pose estimation approach for discarded stacked smartphones recycling: Based on instance segmentation and point cloud registration. 基于实例分割和点云配准的废旧堆叠智能手机回收姿态估计方法。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-01-11 DOI: 10.1016/j.wasman.2024.12.045

Jie Li, XueJun Hu, Hangbin Zheng, Gaohua Zhang

{"title":"A pose estimation approach for discarded stacked smartphones recycling: Based on instance segmentation and point cloud registration.","authors":"Jie Li, XueJun Hu, Hangbin Zheng, Gaohua Zhang","doi":"10.1016/j.wasman.2024.12.045","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.045","url":null,"abstract":"With the rapid increase in end-of-life smartphones, enhancing the automation and intelligence of their recycling processes has become an urgent challenge. At present, the disassembly of discarded smartphones predominantly relies on manual labor, which is not only inefficient but also associated with environmental pollution and high labor intensity. In the context of end-of-life smartphone recycling, complex situations such as stacking and occlusion are commonly encountered. Accurate pose information can provide critical data for precise robotic grasping, thereby improving the level of automation and efficiency in recycling and disassembly. This research proposes a pose estimation method tailored for stacked discarded smartphones, integrating an improved Mask R-CNN instance segmentation model with Iterative Closest Point (ICP) point cloud registration technology. The method begins by accurately segmenting stacked smartphones using both real and synthetic datasets. Subsequently, pose information is extracted through the proposed estimation approach, providing critical data to guide the robotic arm's grasping actions, thereby improving sorting efficiency and minimizing manual intervention. To enhance its practical applicability, a pose recognition interactive system is developed, enabling visualization and dynamic interaction with pose data. Experimental results demonstrate the effectiveness of the transfer learning algorithm, which leverages a large volume of synthetic data combined with a small batch of real-world data. This research offers valuable theoretical insights and technical solutions for advancing the automation and intelligent disassembly of end-of-life smartphones.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"194 ","pages":"149-157"},"PeriodicalIF":7.1,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142971067","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

Identification of waste lithium-ion battery cell chemistry for recycling. 废旧锂离子电池的化学回收鉴定。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-01-10 DOI: 10.1016/j.wasman.2024.12.038

John Bachér, Samppa Jenu, Tuula Kajolinna

{"title":"Identification of waste lithium-ion battery cell chemistry for recycling.","authors":"John Bachér, Samppa Jenu, Tuula Kajolinna","doi":"10.1016/j.wasman.2024.12.038","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.038","url":null,"abstract":"Battery technology has attained a key position as an energy storage technology in decarbonization of energy systems. Lithium-ion batteries have become the dominant technology currently used in consumer appliances, electric vehicles (EVs), and industrial applications. However, lithium-ion batteries are not alike and can have different cathode chemistries which makes their recycling more complex. In addition, as larger quantities of batteries are starting to enter their end-of-life (EOL) stage, efficient handling and management of batteries with different cathode chemistry types are required. By identifying the cathode chemistry type prior to mechanical treatment, mixing of different cathode chemistries could be decreased, resulting in an increase in overall recycling efficiency. This study investigated the applicability of a non-destructive battery diagnostic methods, namely incremental capacity analysis (ICA), for identifying EOL lithium-ion battery chemistry. The study conducted ICA both on known reference batteries and EOL batteries from the recycling industry. Next, EOL batteries were crushed and the resulting fine active material was analysed to validate the ICA result. In addition, released gaseous and airborne particles were measured during crushing. The ICA results showed reliable identification of lithium iron phosphate (LFP) from other chemistries. In addition, lithium cobalt oxide (LCO), lithium nickel cobalt aluminum oxide (NCA) and lithium nickel manganese cobalt oxide (NMC) could be identified with various degrees. The identification may suffer if the battery is heavily used, and its state of health is low.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"194 ","pages":"137-148"},"PeriodicalIF":7.1,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142972317","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

Waste control by waste: Metals recovery from electroplating sludge via a chlorination roasting followed by silicothermic reduction using solar-grade silicon cutting waste. 废物控制废物：通过氯化焙烧从电镀污泥中回收金属，然后使用太阳级硅切割废料进行硅热还原。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-01-10 DOI: 10.1016/j.wasman.2024.12.036

Yixuan Sun, Lei Li, Junli He, Yun Lei

{"title":"Waste control by waste: Metals recovery from electroplating sludge via a chlorination roasting followed by silicothermic reduction using solar-grade silicon cutting waste.","authors":"Yixuan Sun, Lei Li, Junli He, Yun Lei","doi":"10.1016/j.wasman.2024.12.036","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.036","url":null,"abstract":"Electroplating sludge (ES) is a hazardous waste, because it contains heavy metals. It poses severe environmental and health risk if not properly disposed. This study proposed a combined pyro-metallurgical process to separate and recover copper, nickel, chromium and iron from it. A chlorination roasting was firstly used to selectively recover copper and nickel, in which they were chlorinated and volatilized while chromium and iron retained in the residue in the forms of FeCr2O4 and Fe2O3. A certain FeS2 promoted the conversion of the chlorinating agent of NaClO to Cl2 (g), increasing the copper and nickel chlorination. Though Cr2S3 could be chlorinated and volatilized, a high O2 partial pressure oxidized it to Cr2O3 and reduced it chlorination. Under the optimal condition, the chlorination of copper and nickel obtained 99.1 % and 92.6 % respectively, while that of chromium was only 5.7 %. In the followed silicothermic reduction, a silicon cutting waste (Si-CW) was employed as reductant to recover chromium and iron from the roasted residue, due to the reduction capacity of Si and SiC phases in it. The chromium and iron oxides were reduced and recycled in an Fe-Cr alloy ingot, and Si and SiC changed to a refractory SiO2 and entered into the slag. CaO could be slagged with SiO2 and converted to a slag-liquid phase, which accelerated the separation between alloy and slag. The chromium and iron yields could obtain 97.6 % and 98.9 %, respectively. This study supplied a new method to co-treat two wastes for recovering nickel, iron, copper and chromium.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"194 ","pages":"125-136"},"PeriodicalIF":7.1,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142972320","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

Carbon filter layer for respirator derived from acrylic filter felt. 呼吸器碳过滤层由丙烯酸滤毡制成。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-01-09 DOI: 10.1016/j.wasman.2025.01.005

Yuanfeng Wang, Mohanapriya Venkataraman, Dana Křemenáková, Jakub Hrůza, Jiří Militký

{"title":"Carbon filter layer for respirator derived from acrylic filter felt.","authors":"Yuanfeng Wang, Mohanapriya Venkataraman, Dana Křemenáková, Jakub Hrůza, Jiří Militký","doi":"10.1016/j.wasman.2025.01.005","DOIUrl":"https://doi.org/10.1016/j.wasman.2025.01.005","url":null,"abstract":"Pyrolysis emerges as a strategy for handling waste textiles, wherein the conversion of high-carbon-content textile waste into carbonaceous materials facilitates the restoration of its economic value, concurrently mitigating the environmental impact posed by textile waste. The present study fabricated carbon felts for respiratory filter layers through single-step pyrolysis of acrylic filter felts. The advantage of employing conductive carbon felt as a respiratory filter layer is its capability to concurrently serve two functions: filtration and electrical heating for high-temperature disinfection. In order to achieve these two functions, both the respirator body and the embedded electrodes were designed to ensure the reliability of high-temperature disinfection. The breathability and water vapor permeability of the obtained carbon felt were examined to confirm its comfortability as a respiratory filter layer. The results of filtration efficiency and antimicrobial testing indicated that the carbon felt exhibited a filtration efficiency of over 90 % against inhalable particulate matter, while its antimicrobial properties effectively suppressed microbial growth. This method of reutilizing waste textiles maintained consistency in the usage of textiles before and after reuse, simplified the reusing process of waste acrylic fibers, and simultaneously reduced the manufacturing costs of respiratory filters. The designed respiratory filters have the potential for application in settings such as hospitals and virus research institutions.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"194 ","pages":"115-124"},"PeriodicalIF":7.1,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142967089","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

Deciphering the driving mechanism of microbial community for rapid stabilization and lignocellulose degradation during waste semi-aerobic bioreactor landfilling with multifunctional microbial inoculum. 用多功能微生物接种物解读垃圾半好氧生物反应器填埋过程中微生物群落快速稳定和木质纤维素降解的驱动机制。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-01-08 DOI: 10.1016/j.wasman.2025.01.007

Minghui Wu, Yiqian Tao, Qilu Zeng, Zhengyong Pan, Han Zhang, Zhiyan Yin, Wenjian Li, Yanxin Liu, Xing Li, Zhongping Qiu

{"title":"Deciphering the driving mechanism of microbial community for rapid stabilization and lignocellulose degradation during waste semi-aerobic bioreactor landfilling with multifunctional microbial inoculum.","authors":"Minghui Wu, Yiqian Tao, Qilu Zeng, Zhengyong Pan, Han Zhang, Zhiyan Yin, Wenjian Li, Yanxin Liu, Xing Li, Zhongping Qiu","doi":"10.1016/j.wasman.2025.01.007","DOIUrl":"https://doi.org/10.1016/j.wasman.2025.01.007","url":null,"abstract":"Owing to the massive refractory lignocellulose and leachate-organic loads, the stabilization of municipal solid waste (MSW) landfill is often prolonged, resulting in environmental burdens. Herein, various assembled multifunctional microbial inoculums (MMIs) were introduced into the semi-aerobic bioreactor landfill (SABL) to investigate the bioaugmentation impacts. Compared to control (CK) and other MMIs treatments (G1-G3), LD + LT + DM inoculation (G4) significantly increased volatile solids degradation (9.72-45.03 %), while reducing chemical oxygen demand (COD) content (10.34-51.85 %) and ammonia nitrogen concentration (80.71-90.95 %) in the leachate. G4 also exhibited significantly higher degradation of cellulose and hemicellulose, achieving 0.99 and 1.94 times higher efficiency than CK, respectively. Microbial analysis revealed that LD + LT + DM reshaped microbial communities composition of SABL, with most of the introduced microorganisms (Enterobacter, Sphingobacterium, Streptomyces, etc.) successfully colonizing, and stimulating indigenous functional microbes associated with organic matter decomposition. Additionally, microbial interactions were strengthened in G4, accompanied by the higher abundance of 11 biomarkers and enzymes involved in lignocellulose degradation and ammonia nitrogen conversion. Overall, LD + LT + DM maximized MMI function by reconstructing synergistic core microbes. These findings highlight the superiority of LD + LT + DM in simultaneously regulating the microbial composition of lignocellulose-rich waste landfills, expediting MSW decomposition, improving leachate treatment, and mitigating odor emissions, offering valuable insights for efficient MSW management.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"194 ","pages":"88-103"},"PeriodicalIF":7.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142955993","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

How to encourage well-being with reminders interventions: A field experiment on food waste separation and composting behaviors. 如何通过提醒干预来鼓励健康：一项关于食物垃圾分类和堆肥行为的实地实验。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-01-08 DOI: 10.1016/j.wasman.2025.01.002

Zhu Mao, Buxin Han, Chuanbin Zhou, Pingping Liu

{"title":"How to encourage well-being with reminders interventions: A field experiment on food waste separation and composting behaviors.","authors":"Zhu Mao, Buxin Han, Chuanbin Zhou, Pingping Liu","doi":"10.1016/j.wasman.2025.01.002","DOIUrl":"https://doi.org/10.1016/j.wasman.2025.01.002","url":null,"abstract":"Although well-being is a fundamental human goal, few studies have clarified the causal relationship between well-being and waste separation, which strongly affects sustainable development. We propose that, assuming humans' innate affinity for nature (the biophilia theory), waste separation would be conducive to a sense of life meaning and well-being. To test this hypothesis, we systematically investigate how food waste separation and composting behaviors affect subjective well-being and meaning in life in a longitudinal field experiment. 226 valid residents were randomized into intervention (n = 113) or control (n = 113) groups. The participants in the intervention group were provided informational reminders (please separate food waste) for 9 weeks, and were asked to record their food waste separation and composting behaviors. We find that community residents who performed food waste separation and composting behaviors (intervention group) had a higher meaning in life and subjective well-being than those who did not (control group). Meanwhile, food waste separation and composting behaviors can promote subjective well-being through the sequential mediation effects of nature connectedness and meaning in life, validating the biophilia theory. These findings not only provide compelling evidence for how waste separation behaviors can promote well-being but also generate important implications for policy-makers and the understanding of pro-environmental behaviors.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"194 ","pages":"104-114"},"PeriodicalIF":7.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142955995","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

Machine learning-based automated waste sorting in the construction industry: A comparative competitiveness case study. 建筑行业基于机器学习的自动垃圾分类：比较竞争力案例研究。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-01-08 DOI: 10.1016/j.wasman.2025.01.008

Zeinab Farshadfar, Siavash H Khajavi, Tomasz Mucha, Kari Tanskanen

{"title":"Machine learning-based automated waste sorting in the construction industry: A comparative competitiveness case study.","authors":"Zeinab Farshadfar, Siavash H Khajavi, Tomasz Mucha, Kari Tanskanen","doi":"10.1016/j.wasman.2025.01.008","DOIUrl":"https://doi.org/10.1016/j.wasman.2025.01.008","url":null,"abstract":"This article presents a comparative analysis of the circularity and cost-efficiency of two distinct construction material recycling processes: ML-based automated sorting (MLAS) and conventional sorting technologies. Empirical data was collected from two Finnish companies, providing a robust foundation for this comparison. Our study examines the operational specifics, economic implications, and environmental impacts of each method, highlighting the advantages and drawbacks. By leveraging data-driven insights, we aim to illustrate how MLAS can enhance recycling efficiency and sustainability compared to traditional methods. In our cost modeling over a seven-year period, MLAS achieved a cumulative cost of €12.76 million, significantly lower than CS, which incurred €21.47 million, underscoring the long-term cost efficiency of MLAS. The findings underscore the potential for advanced AI technologies to revolutionize waste management practices, offering significant improvements in sorting accuracy, material recovery rates, and overall cost-effectiveness. This analysis provides valuable perspectives for stakeholders in the construction and waste management industries, emphasizing the importance of integrating innovative technologies to achieve higher circularity and sustainability goals.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"194 ","pages":"77-87"},"PeriodicalIF":7.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142955996","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

Comparing sewage sludge vs. digested sludge for starting-up thermophilic two-stage anaerobic digesters: Operational and economic insights. 启动两级厌氧消化池的污水污泥与消化污泥的比较：操作和经济见解。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-01-07 DOI: 10.1016/j.wasman.2024.12.032

Amal Hmaissia, Edgar Martín Hernández, Céline Vaneeckhaute

{"title":"Comparing sewage sludge vs. digested sludge for starting-up thermophilic two-stage anaerobic digesters: Operational and economic insights.","authors":"Amal Hmaissia, Edgar Martín Hernández, Céline Vaneeckhaute","doi":"10.1016/j.wasman.2024.12.032","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.032","url":null,"abstract":"Despite advances in anaerobic digestion (AD), full-scale implementation faces significant challenges, particularly during the start-up phase, where inoculum selection is crucial. This study examines the impact of inoculum choice on the operational and economic performance of thermophilic digesters during the start-up phase. Methanogenic reactors R3 and R4 were inoculated with digested sludge (DiS) and diluted sewage sludge (DSS), respectively, and fed with hydrolyzed source-sorted organic fraction of municipal solid waste (SS-OFMSW) and thickened sewage sludge, which were processed in R1 and R2, serving as acidogenic reactors. A two-stage AD configuration was employed to mitigate inhibitory effects associated with the undigested inoculum (DSS). This approach enabled the establishment of methanogenic activity in R4 when the AD system is initiated with DSS. However, R3 outperformed R4, achieving 49 % of the feedstock's theoretical methane potential compared to 15 % in R4. Methane production and volatile solids (VS) processing costs in R4 were 18 and 3 times higher than in R3, respectively. R3's superior performance was attributed to DiS's diverse bacterial community, with over 66 % of genera involved in hydrolysis, volatile fatty acid production, and syntrophic methane production. In contrast, DSS was dominated by Trichococcus and Lactococcus (75.4 %), primarily involved in butyrate oxidation and lactate production. This study provides valuable insights into effective inoculum selection for the start-up of full-scale digesters.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"194 ","pages":"24-35"},"PeriodicalIF":7.1,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142955992","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

Automated gradation design of natural waste gravel soil stabilized by composite soil stabilizer based on a novel DNNSS-APDM-PFC model. 基于新型DNNSS-APDM-PFC模型的复合土稳定剂稳定天然废砾土自动级配设计

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-01-07 DOI: 10.1016/j.wasman.2024.12.046

Yulong Zhao, Ke Zhang, Fei Dong, Yaofei Luo, Song Liu

{"title":"Automated gradation design of natural waste gravel soil stabilized by composite soil stabilizer based on a novel DNNSS-APDM-PFC model.","authors":"Yulong Zhao, Ke Zhang, Fei Dong, Yaofei Luo, Song Liu","doi":"10.1016/j.wasman.2024.12.046","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.046","url":null,"abstract":"The utilization of natural waste gravel soil as base course material contributes to environmental protection and carbon emission reduction. The purpose of this research is to establish a new model for automated gradation design of the composite soil stabilizer-stabilized waste gravel soil (CSSWGS). A gradation range of CSSWGS has been proposed. The bearing capacity of the waste gravel soils was analyzed using the Particle Flow Code (PFC). The pavement structure performances of CSSWGS with different gradations were also evaluated using the asphalt pavement design method in China (APDM). A critical scientific challenge is to provide foundational predictive data for the gradation design. To address this, a deep learning neural network for small sample (DNNSS) was constructed to predict unconfined compressive strength (UCS) and frost resistance, offering analytical data for both of the aforementioned software. The Adaptive Moment Estimation (Adam) algorithm was employed to dynamically adjust the learning rate, thereby accelerating network; the Dropout function was used to alleviate overfitting; and the Rectified Linear Unit (ReLU) function was used as the activation function to solve the gradient vanishing problem. The results show that the DNNSS algorithm exhibits superior prediction performance compared to other deep learning algorithms. When employing the web version of APDM and the virtual California Bearing Ratio (CBR) test, the analysis results based on the predicted values from DNNSS and measured values were found to be consistent or closely aligned. Consequently, the new DNNSS-APDM-PFC model, leveraging the intelligent algorithm developed in this study, can be effectively utilized for designing the gradations of CSSWGS or analyzing the gradation performances of CSSWGS obtained from field applications.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"194 ","pages":"64-76"},"PeriodicalIF":7.1,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142955991","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

PbSO₄ reaction mechanism in oxygen and reduction atmospheres during co-smelting process with primary lead material. PbSO4与原铅材料共熔炼过程中氧气和还原气氛下的反应机理。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-01-07 DOI: 10.1016/j.wasman.2025.01.001

Yunyan Wang, Maixin Yu, Yu Liu, Xiaobo Min, Zelong Huang, Cong Peng, Yong Ke, Pingsheng Zeng, Xingwu Lu, Yun Li

{"title":"PbSO4 reaction mechanism in oxygen and reduction atmospheres during co-smelting process with primary lead material.","authors":"Yunyan Wang, Maixin Yu, Yu Liu, Xiaobo Min, Zelong Huang, Cong Peng, Yong Ke, Pingsheng Zeng, Xingwu Lu, Yun Li","doi":"10.1016/j.wasman.2025.01.001","DOIUrl":"https://doi.org/10.1016/j.wasman.2025.01.001","url":null,"abstract":"At present, lead-containing wastes have increasingly become the raw materials together with primary lead concentrate for lead production to meet the ever-increasing lead demand market. PbSO4 is the dominant component in the lead-containing wastes, nevertheless, its reaction behavior during lead smelting is not sufficiently investigated. This study investigated PbSO4 decomposition behaviors and phase transformation mechanisms at oxidizing and reductive atmospheres and various gas flow rates. The investigations reveal that increasing the temperature and decreasing the oxygen partial pressure of the decomposition atmosphere can accelerate PbSO4 decomposition degree. PbSO4 decomposition intensity under different atmospheres follows the order of reducing atmosphere > inert atmosphere > oxidizing atmosphere. PbSO4 decomposition path was identified: at a non-reductive atmosphere, the decomposition of PbSO4 belongs to a multi-step decomposition process, PbSO4 gradually decompose into xPbO·PbSO4 (x = 1, 2, 4 in turn) and finally PbO. At a reductive atmosphere, the multi-step decomposition process was accelerated significantly, at the same time, the reduction decomposition path PbSO4 → PbS was increasingly dominant with the extension of decomposition time. PbS and Pb were generated successively. Therefore, a suitable reducing atmosphere is suggested to co-smelt PbSO4-bearing wastes in primary lead smelting furnace.","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"194 ","pages":"45-54"},"PeriodicalIF":7.1,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142955997","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