Process Safety and Environmental Protection最新文献

{"title":"TEMPORARY REMOVAL: Corrigendum to “Chloridizing roasting studies of spent NdFeB magnets for recovery of rare earth values” [Process Saf. Environ. Prot. 191A (2024) 1534–1547]","authors":"Rohit Gahlot, Rakesh Velpoor, Nikhil Dhawan","doi":"10.1016/j.psep.2024.12.024","DOIUrl":"https://doi.org/10.1016/j.psep.2024.12.024","url":null,"abstract":"The publisher regrets that this article has been temporarily removed. A replacement will appear as soon as possible in which the reason for the removal of the article will be specified, or the article will be reinstated.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"35 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031453","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}

{"title":"Experimental burnout characteristics of coal gasification fine ash under high temperature conditions and numerical simulation of tangential combustion","authors":"Jiawei Li, Tianyuan Yang, Xuyang Zhang, Zhichao Chen, Hongpeng Liu, Qing Wang","doi":"10.1016/j.psep.2025.106824","DOIUrl":"https://doi.org/10.1016/j.psep.2025.106824","url":null,"abstract":"Developing efficient methods for processing and utilizing coal gasification fine ash (CGFA) is an important issue that urgently needs to be addressed. High temperature combustion can effectively remove unburned carbon and generate secondary ash for further utilization. Through the drop-tube furnace (DTF) combustion CGFA experiment, it can be concluded that the temperature of 1200 ℃ and the residence time of 1.5 s, the carbon content of the furnace outlet fly ash was 0.2 %. Based on the high-temperature combustion characteristics experiment of CGFA, the combustion model of CGFA was verified through the numerical simulation, further exploring the high-temperature tangential combustion behavior of CGFA and bituminous coal. Through numerical simulation research, CGFA was uniformly distributed in the three-layer burners for co-combustion was the optimal operation, and the NO<ce:inf loc=\"post\"><ce:italic>x</ce:italic></ce:inf> concentration and fly ash carbon content at the furnace outlet were respectively 218.32 mg/m<ce:sup loc=\"post\">3</ce:sup> and 98.47 %. The numerical simulation result shows that the co-combustion of CGFA and pulverized coal in power plant was feasible. This article reveals the combustion characteristics and application prospects of CGFA from a new perspective of high-temperature combustion and tangential combustion.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"206 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031450","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}

{"title":"Recycling microfines of manufactured sand into fabricating robust highly flowable cement-tailings grout","authors":"Shuai Wang, Chao Wang, Shuwei Li, Shenghao Zuo","doi":"10.1016/j.psep.2025.106837","DOIUrl":"https://doi.org/10.1016/j.psep.2025.106837","url":null,"abstract":"To enhance the poor performance of highly flowable grout cement tailings grouts (CTGs) in a more sustainable way, this study proposes an effective measure by using microfines of manufactured sand (MMS) to improve the static stability and homogeneity of CTGs at both fresh and hardened states. In this work, iron tailings sand (TS) was partially replaced by MMS in equal volume, effect of MMS on the flowability and static stability at fresh state and mechanical properties of CTGs was illustrated. The density method, Backscattered electron microscopy (BSE) and thermogravimetric analysis (TGA) were employed to determine the homogeneity and microstructure. The results show that the replacement of TS by MMS improves its static stability and the homogeneity after hardening, the optimal content of MMS is 20 % by volume. The replacement of TS by finer MMS particles modifies the viscosity of fresh grouts and also favors the mechanical performances and microstructure development by providing nucleation sites. These findings provide a reliable and low-cost way for preparing highly robust materials for grouting or backfilling with excellent static stability and homogeneity.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"15 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031449","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}

{"title":"Sustainable biodiesel production from waste cooking oil using oyster shell-derived superparamagnetic acid-base bifunctional biochar","authors":"Guohui Zhang, Wenjie Liang, Jing Liu, Guanyi Chen, Jingang Yao, Beibei Yan, Haoran Wang, Yang Zhang","doi":"10.1016/j.psep.2025.106820","DOIUrl":"https://doi.org/10.1016/j.psep.2025.106820","url":null,"abstract":"This study evaluates the catalytic potential of a waste-derived magnetic acid-base bifunctional nanocatalyst, CaO-Fe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>-based biochar (CaO-Fe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>/BC), synthesized from oyster shells, for the conversion of waste cooking oil (WCO) into biodiesel. The research aims to mitigate waste generation and reduce the environmental impact of fossil fuel consumption, thereby promoting sustainable energy utilization. The catalyst's properties were comprehensively analyzed using various characterization techniques, while the effects of experimental reaction variables including catalyst loading, methanol-to-oil molar ratios, reaction temperatures and times were evaluated to enhance the transesterification. Additionally, response surface methodology was employed to optimize and enhance the efficiency of the transesterification process. N<ce:inf loc=\"post\">2</ce:inf> physisorption measurement revealed its suitability for ester exchange reactions, boasting a higher specific surface area (48.82 m<ce:sup loc=\"post\">2</ce:sup> g<ce:sup loc=\"post\">−1</ce:sup>) and pore size (19.26 nm) than those (2.643 m<ce:sup loc=\"post\">2</ce:sup> g<ce:sup loc=\"post\">−1</ce:sup> and 9.385 nm, respectively) of traditional CaO catalysts. A biodiesel yield of 95.6 % was obtained under optimized conditions of 65 ℃, 4 wt% catalyst loading, a methanol-to-oil molar ratio of 17:1 and a reaction time of 2.5 h. Response surface methodology (RSM) determined optimal conditions: 4.30 wt% catalyst loading, 17.60 alcohol-to-oil molar ratio, 66.50 °C, and 2.65 h, yielding 96.8 % biodiesel. With a magnetic strength of 14.26 emu g<ce:sup loc=\"post\">−1</ce:sup>, CaO-Fe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>/BC allowed efficient recovery through magnetic decantation. The work further analyzes the mechanism of CaO-Fe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>/BC-catalyzed transesterification and assesses the repeatability of the catalyst. CaO-Fe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>/BC demonstrated satisfactory stability and reusability, maintaining a biodiesel yield of 72.3 % even after 8 cycles. Additionally, the fuel properties of the produced biodiesel complied with ASTM and EN standards, highlighting the catalyst's significant potential for industrial applications.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"45 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031452","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}

{"title":"Techno-economic and environmental assessment of glycerol valorization to polyhydroxybutyrate using chemical digestion methods","authors":"Piyawan Thanahiranya, Treerat Vacharanukrauh, Pongtorn Charoensuppanimit, Santi Chuetor, Merika Chanthanumataporn, Suttichai Assabumrungrat","doi":"10.1016/j.psep.2025.106832","DOIUrl":"https://doi.org/10.1016/j.psep.2025.106832","url":null,"abstract":"Polyhydroxybutyrate (PHB) is a biodegradable polymer that can be produced from glycerol, a major by-product of biodiesel plants. However, the high production costs associated with the inefficient downstream process have impeded the commercialization of PHB. Previously, several methods have been demonstrated capable of recovering PHB<ce:sup loc=\"post\">__</ce:sup> among them, chemical digestion appeared to be the most effective. There are various classes of chemical digestion. This study examined the processes of PHB production from glycerol using three different classes of chemical digestion including alkaline digestion, surfactant digestion, and alkaline−surfactant digestion for PHB recovery. The processes are evaluated based on performance indexes, such as techno-economic, energy utilization, and greenhouse gas (GHG) emissions. According to the simulated results, the use of alkaline digestion for PHB recovery is economically attractive. Based on PHB production capacity of 5,000 tonnes/y, the best production provides a net present value of 442 million USD, an internal rate of return of 76.6 %, and a payout period of 2.48 years. Furthermore, important findings from this investigation also reveal that heat integration not only reduces energy consumption but also minimizes operating costs and GHG emissions. Therefore, the production of PHB from glycerol using alkaline digestion for PHB recovery may find commercial application in the bioplastic industry.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"49 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031451","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}

{"title":"Rhodotorula-derived polyol esters of fatty acids (PEFA): Insights into a promising class of high-value glycolipids","authors":"Mohamed Guerfali","doi":"10.1016/j.psep.2025.106815","DOIUrl":"https://doi.org/10.1016/j.psep.2025.106815","url":null,"abstract":"Recent advancements in microbial biorefinery technologies have led to innovative methods for producing bioactive compounds. A key focus of these advancements is the use of novel microorganisms that act as robust cellular factories, better adapted to stress conditions and capable of simultaneously producing a wide range of bioactive metabolites. Among these, <ce:italic>Rhodotorula</ce:italic> yeast species are recognized as promising for industrial applications, particularly known for their production of polyol esters of fatty acids (PEFA), a unique group of glycolipids. This review is the first to exclusively describe <ce:italic>Rhodotorula</ce:italic>-derived PEFA, highlighting their distinctive biochemical properties, biosynthesis pathways, and structural diversity. The ability of <ce:italic>Rhodotorula</ce:italic> to utilize industrial by-products for PEFA production through de-novo pathways offers an eco-friendly solution, reducing reliance on hydrophobic inducers and expensive raw materials. Additionally, the simplicity of downstream processing streamlines extraction and enhances cost-effectiveness. Notably, the structural diversity of PEFA reveals a range of configurations, contributing to their versatility in applications such as emulsification, antimicrobial activity, and anticancer therapies. Despite these advantages, challenges related to large-scale production and commercial viability persist. This review provides a comprehensive overview of the biotechnological potential of PEFA while addressing current limitations and exploring opportunities for future advancements in this field.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"1 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031454","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}

{"title":"Utilizing liquid tin for fluorine gas removal and upcycling by-products: A sustainable approach","authors":"Hyeonjin Eom, Woo Jin Lee, Junghun Park, Jung Hyeon Park, Whi Dong Kim, Chinsung Mock, Uendo Lee","doi":"10.1016/j.psep.2025.106802","DOIUrl":"https://doi.org/10.1016/j.psep.2025.106802","url":null,"abstract":"Nitrogen trifluoride (NF<ce:inf loc=\"post\">3</ce:inf>), a widely used gas in the semiconductor and display industry, has significant environmental implications because of its high radiative forcing properties and slow decomposition rate. The safe handling and recycling/upcycling of NF<ce:inf loc=\"post\">3</ce:inf> gas can play a crucial role in environmental protection and mitigating global warming. This study investigates the decomposition of NF<ce:inf loc=\"post\">3</ce:inf> and the characteristics of the fluorine compounds generated through its reaction with liquid tin, exploring the potential for upcycling these greenhouse gases. NF<ce:inf loc=\"post\">3</ce:inf> was passed through a reactor containing liquid tin to induce a reaction between NF<ce:inf loc=\"post\">3</ce:inf> and liquid tin, while the produced particulate matter was filtered out. The experimental results revealed distinct structural and compositional characteristics of three retrieved by-products formed from the reaction: tin ingot, powders from the interior of the reactor, and particulate matter captured on the filter. Notably, the particulate matter with a high SnF<ce:inf loc=\"post\">2</ce:inf> content coated on the filter exhibits appropriate antibacterial properties and cytotoxicity. The primary fluorine compound, SnF<ce:inf loc=\"post\">2</ce:inf>, derived from the reaction between liquid tin and NF<ce:inf loc=\"post\">3</ce:inf>, suggests potential applications as an antibacterial material. Thus, this study offers a new perspective on the reduction of fluorinated gases and the upcycling of fluorine compounds.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"13 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031455","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}

{"title":"Construction of Yarrowia lipolytica for degradation of low-density polyethylene","authors":"Fei Liu, Ni Zhang, Yutong Shang, Mingdong Yao, Mingzhu Ding, Yingjin Yuan","doi":"10.1016/j.psep.2025.106818","DOIUrl":"https://doi.org/10.1016/j.psep.2025.106818","url":null,"abstract":"The current extensive production and widespread use of polyethylene (PE) has resulted in the accumulation of its waste in the environment, posing a significant threat to the global ecosystem and human health. Biodegradation is regarded as an environmentally sustainable approach for plastic waste treatment. However, achieving high biodegradation efficiency of PE is primary challenge. In this study, the engineered <ce:italic>Yarrowia lipolytica</ce:italic> strains, expressing heterologous PE-degrading enzymes, were successfully constructed for enhancing degradation of pretreated low-density polyethylene (LDPE) at room temperature. SEM results showed significant changes in surface roughness and erosion of pretreated samples after incubation with the engineered strains of alkane hydroxylase-secreting YPE04 and laccase-secreting YPE10. Notably, YPE04 and YPE10 reduced the weight of LDPE films by 8.9 ± 0.9 % and 11.8 ± 0.7 %, respectively, within 7 days. It was further clarified by GC-MS that the main degradation products of LDPE films by the aforementioned two engineered strains were 9-octadecenoic acid and n-dodecyl methacrylate, respectively. Overall, two strains, YPE04 and YPE10, were obtained with great potential for LDPE degradation. This study not only provides a reference for the construction of efficient PE-degrading strains but also offers new ideas for the application of bioremediation technology in plastic waste management.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"103 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031456","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}

{"title":"Ecological and health risk assessment and anthropogenic sources analysis of heavy metals in different types of urban road dust","authors":"Yunyao Ma, Yong Zhang, Li Song","doi":"10.1016/j.psep.2025.106813","DOIUrl":"https://doi.org/10.1016/j.psep.2025.106813","url":null,"abstract":"In aerosol science, heavy metal pollution is a hot issue, particularly when it comes to road dust in densely populated cities. Herein, 65 different types of road dust samples from Xiangtan City were examined for their degree of heavy metal pollution and associated ecological risks using the Geo-accumulation Index (IGEO), Pollution Load Index (PLI), and Potential Ecological Risk Index (PERI). The health risks of heavy metals were quantified and analyzed using human exposure and health risk assessment models. Heavy metal pollution sources and their contribution rates were determined using the Positive Matrix Factorization (PMF) model. The average contents of Cu, Pb, Zn, Cd, and Cr in road dust samples from Xiangtan were 91.295 mg/kg, 549.631 mg/kg, 536.799 mg/kg, 0.432 mg/kg, and 115.596 mg/kg, respectively. In different types of road dust, Cd content was the lowest, and Pb content was the highest except for samples from the main road. Furthermore, Pb had the highest IGEO value, with all sample sites exhibiting strong pollution levels or higher. The combined PERI categorized the heavy metals under moderate ecological risk. The health risk assessment of the heavy metals showed that the noncarcinogenic risk of road dust to adults was within acceptable limits. Conversely, the noncarcinogenic risk of Pb to children was notable, the carcinogenic risk of Cd to humans was &lt; 10<ce:sup loc=\"post\">−6</ce:sup>, and the carcinogenic risk of Cr surpassed the human body’s tolerable range. Finally, the primary sources of heavy metals in road dust were industrial activities (32.05 %), transportation (34.90 %), and a combination of transportation, industrial, and construction activities (33.05 %).","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"10 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031457","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}

{"title":"Efficiency enhancement of an actual wastewater treatment power plant by improving and redesigning heat exchangers","authors":"Hamze Ravaei, S.M. Pesteei","doi":"10.1016/j.psep.2025.106805","DOIUrl":"https://doi.org/10.1016/j.psep.2025.106805","url":null,"abstract":"Producing biogas from different biomass sources and converting it into applicable energy is one of the energy supply methods. One of the uncomplicated methods is the combined heat and power engine (CHP). Determining an actual system optimal operation mode is an essential step in such systems. On the other hand, optimal use of the heat produced by the CHP engine can enhance the efficiency of the system. Regarding the importance of these matters, in this paper, an exergoeconomic analysis of an actual wastewater treatment power plant running in Tehran city, which utilizes a CHP engine as a prime mover, is done using EES software. According to the modelling results, the optimal system performance occurs while using two digesters and two engines. This operation mode increases the system energy and exergy efficiency by almost 20% and 30 %; however, it increases the operating cost by about 35 $/h and reduces the payback period from 15 years to 5 years. Two methods are suggested to enhance heat transfer. The first method involves improving the design of the heat exchangers, which results in a 5 % increase in the system efficiency with an initial cost of $3000 and increasing the operation costs by 7 $/h. However, it reduces the payback period from 5.5 years to 5.2 years. The second method is to add a heat exchanger to the system, which results in an approximate 10 % improvement in thermal efficiency. Nonetheless, this method increases the system operation cost by about 12 $/h and decreases the payback period to roughly 2.8 years. In this paper, we emphasize the importance of the operation method in the payback period of the systems, which demonstrates the possibility of recovering significant heat via the use of the suitable heat exchangers in the studied power plant.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"19 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031459","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}