Process Safety and Environmental Protection最新文献_第6页

Experimental study on the thermodynamic response characteristics of superheated liquid under explosive boiling 爆炸沸腾下过热液体热力学响应特性的实验研究

IF 7.9 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2026-07-15 Epub Date: 2026-06-22 DOI: 10.1016/j.psep.2026.109189

Jianlei Zhang, Xinao Wang, Di Yu, Qiangqiang Hao, Jingjing Yang, Jingjie Ren, Mingshu Bi

{"title":"Experimental study on the thermodynamic response characteristics of superheated liquid under explosive boiling","authors":"Jianlei Zhang, Xinao Wang, Di Yu, Qiangqiang Hao, Jingjing Yang, Jingjie Ren, Mingshu Bi","doi":"10.1016/j.psep.2026.109189","DOIUrl":"10.1016/j.psep.2026.109189","url":null,"abstract":"<div><div>To investigate the thermodynamic response of superheated liquid during rapid depressurization, explosive boiling experiments are conducted in a 3.5 L visualization vessel using R134a as the working fluid. The effects of vent diameter, initial pressure, and filling ratio on the thermodynamic response characteristics during explosive boiling are systematically analyzed. The results show that a larger vent diameter, higher initial pressure, and higher filling ratio promote more violent two-phase flow evolution, greater liquid thermal energy release, larger flash mass, and stronger pressure rebound during explosive boiling. The lower temperature drop rate at higher filling ratios does not indicate weaker explosive boiling, but is mainly attributed to the larger liquid mass and greater overall heat capacity. The introduced maximum liquid thermal energy release rate increases with the initial conditions, showing a trend consistent with cumulative flash mass. This indicates that greater liquid thermal energy release promotes vapor generation and contributes to pressure rebound. Quantitatively, when the vent diameter, initial pressure, and filling ratio increase over the tested ranges of 5–20 mm, 9.5–11.5 bar, and 0.5–0.75, respectively, the pressure rebound value (Δ<em>P</em><sub>rebound</sub>) increases by 2.5 bar, 0.5 bar, and 0.76 bar. These quantitative results further support the establishment of an empirical correlation between the initial conditions and the pressure rebound value. These findings clarify the thermodynamic coupling during explosive boiling and contribute to a better understanding of BLEVE internal hazards.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"215 ","pages":"Article 109189"},"PeriodicalIF":7.9,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148313195","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

Al@PTFE composite powder explosion characteristics Al@PTFE复合粉末爆炸特性

IF 7.9 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2026-07-15 Epub Date: 2026-06-22 DOI: 10.1016/j.psep.2026.109187

Bin Yan, Xueyong Guo, Qi Zhang

{"title":"Al@PTFE composite powder explosion characteristics","authors":"Bin Yan, Xueyong Guo, Qi Zhang","doi":"10.1016/j.psep.2026.109187","DOIUrl":"10.1016/j.psep.2026.109187","url":null,"abstract":"<div><div>Polytetrafluoroethylene (PTFE)-coated aluminum (Al) powder, denoted as Al@PTFE powder, combines the high energy density of Al with the unique reactivity of PTFE, making its explosion hazard a critical safety concern. In this study, a numerical model for Al@PTFE powder explosions was developed using computational fluid dynamics and combustion theory to characterize their transient explosion dynamics. The results show that, with increasing Al@PTFE powder concentration, the maximum explosion pressure (<em>P</em><sub>max</sub>) and the maximum rate of pressure rise ((d<em>P</em>/d<em>t</em>)<sub>max</sub>) initially increased and then decreased, reaching peak values of 0.802 MPa and 556 MPa/s, respectively, at 300 g/m³ . Similarly, as the PTFE coating ratio increased, <em>P</em><sub>max</sub> and (d<em>P</em>/d<em>t</em>)<sub>max</sub> exhibited the same non-monotonic trend, attaining maximum values of 0.755 MPa and 406 MPa/s, respectively, at a coating ratio of 5%. Furthermore, the dynamic evolution and propagation characteristics of the flame, combustion products, and temperature field were analyzed to elucidate the mechanism by which PTFE regulates the explosion behavior of Al powder. These findings provide useful guidance for the safe application of Al@PTFE powder and the prevention and mitigation of related explosion accidents.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"215 ","pages":"Article 109187"},"PeriodicalIF":7.9,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148313196","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

Enhanced carbon chain elongation by carbon-iron composites: Role of mediated electron transfer and synergistic effects 碳-铁复合材料增强碳链延伸：介导的电子转移和协同效应的作用

IF 7.9 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2026-07-15 Epub Date: 2026-06-25 DOI: 10.1016/j.psep.2026.109205

Yingchun Kou, Renqing Cao, Jiale Liu, Zhifang Ning, Weizhang Zhong, Xue Qin, Yali Huang, Changxiong Zhu

{"title":"Enhanced carbon chain elongation by carbon-iron composites: Role of mediated electron transfer and synergistic effects","authors":"Yingchun Kou, Renqing Cao, Jiale Liu, Zhifang Ning, Weizhang Zhong, Xue Qin, Yali Huang, Changxiong Zhu","doi":"10.1016/j.psep.2026.109205","DOIUrl":"10.1016/j.psep.2026.109205","url":null,"abstract":"<div><div>Carbon materials and iron materials individually promote carbon-chain elongation (CCE), but their synergy and the causal role of electron transfer remain unclear. This study investigated whether carbon-iron (AC[Fe]) composites enhance CCE via electron transfer. Composites were synthesized at C/Fe ratios of 5:1, 1:1, and 1:5, and AC[Fe] (5:1, 10 g·L<sup>−1</sup>) was identified as optimal. This composite alleviated iron particle aggregation and enhanced electrochemical activity, achieving a caproate titer of 11787.3 mg·L<sup>−1</sup>, a 101.5% increase relative to the control. Metagenomic analysis revealed enrichment of chain-elongating bacteria (<em>Oscillibacter ruminantium</em>, <em>Rummeliibacillus suwonensis</em>) and increased abundance of genes encoding reverse β-oxidation and electron transfer components (cytochromes, e-pili, flavoproteins). Unlike previous studies relying primarily on gene abundance correlations, this study used an electron transport chain inhibitor for causal testing: inhibition reduced caproate by 81.3%, and subsequent AC[Fe]5:1 addition restored 25.6% of the loss, providing multi-faceted support for AC[Fe]-mediated electron transfer in CCE. This study achieved synergistic enhancement beyond individual materials by optimizing the C/Fe ratio, and supported the key role of AC[Fe] in mediating electron transfer in CCE, offering a new theoretical and experimental basis for efficient caproate bioproduction.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"215 ","pages":"Article 109205"},"PeriodicalIF":7.9,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357173","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

Recycling Ca-Rich fly ash for calcium carbonate recovery through fluidized-bed homogeneous crystallization technology 利用流化床均匀结晶技术回收富钙粉煤灰回收碳酸钙

IF 7.9 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2026-07-15 Epub Date: 2026-06-24 DOI: 10.1016/j.psep.2026.109114

Po-Yang Lu, Thi-Hanh Ha, Angelo Earvin Sy Choi, Ming-Chun Lu

{"title":"Recycling Ca-Rich fly ash for calcium carbonate recovery through fluidized-bed homogeneous crystallization technology","authors":"Po-Yang Lu, Thi-Hanh Ha, Angelo Earvin Sy Choi, Ming-Chun Lu","doi":"10.1016/j.psep.2026.109114","DOIUrl":"10.1016/j.psep.2026.109114","url":null,"abstract":"<div><div>Fly ash slag (FA), a byproduct of municipal solid waste incineration, offers significant potential as a secondary source for calcium recovery. This study evaluates the application of a fluidized-bed homogeneous crystallization (FBHC) system to convert dissolved calcium in FA leachate into precipitated calcium carbonate (PCC). The influence of key parameters, including pH, Ca²⁺/CO₃²⁻ molar ratio, up-flow velocity, and carbonate source, was systematically examined to improve calcium conversion and crystal development. Optimal conditions (pH 9.0, Ca²⁺/CO₃²⁻ = 1.0, initial Ca²⁺ concentration of 0.096–0.12 M, and up-flow velocity of 57.3 m/h using K₂CO₃) enabled calcium recovery above 98%. The process produced uniform calcite granules (>0.1 mm) with high purity and minimal heavy-metal content (<1%), meeting industrial-grade specifications. Compared with conventional precipitation, the FBHC system facilitated the formation of dense, low-moisture particles, improving solid–liquid separation and reducing sludge generation. These results demonstrate that FBHC provides a viable route for calcium recovery from FA, supporting circular resource utilization in waste-to-resource systems.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"215 ","pages":"Article 109114"},"PeriodicalIF":7.9,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357176","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

Artificial intelligence for climate change mitigation and adaptation: A domain-structured review of methods, applications, and research gaps for seven high-impact domains 缓解和适应气候变化的人工智能：对七个高影响领域的方法、应用和研究差距的领域结构审查

IF 7.9 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2026-07-15 Epub Date: 2026-06-13 DOI: 10.1016/j.psep.2026.109102

L. Minh Dang, Sufyan Danish, Muhammad Fayaz, Gul E. Arzu, Andy Nguyen, Hyoung-Kyu Song, Hyeonjoon Moon

{"title":"Artificial intelligence for climate change mitigation and adaptation: A domain-structured review of methods, applications, and research gaps for seven high-impact domains","authors":"L. Minh Dang, Sufyan Danish, Muhammad Fayaz, Gul E. Arzu, Andy Nguyen, Hyoung-Kyu Song, Hyeonjoon Moon","doi":"10.1016/j.psep.2026.109102","DOIUrl":"10.1016/j.psep.2026.109102","url":null,"abstract":"<div><div>Artificial intelligence (AI) offers transformative potential for climate change mitigation and adaptation, yet the rapid advancement of machine learning (ML) and deep learning (DL) methods has outpaced systematic efforts to organize and evaluate them. Following a rigorous multi-stage screening protocol, we developed a domain-driven taxonomy spanning seven sectors: energy and carbon management, buildings and cities, transportation, industry, agriculture, ecosystem conservation, and weather and disaster forecasting, synthesizing task typologies, representative algorithms, benchmark datasets, and case studies for each. Results show that DL dominates forecasting and monitoring applications, while hybrid and physics-informed approaches remain underutilized. Energy and emission-related mitigation studies are well represented, whereas hydrological systems, ecosystem resilience, and compound hazard prediction remain comparatively limited. Key challenges include data scarcity, uncertainty quantification, and limited transferability to diverse regions and climatic conditions. Unlike prior domain-specific surveys, this review unifies all seven sectors under one taxonomy while explicitly linking technical applications to socio-technical challenges including bias, interpretability, and AI’s own carbon footprint, providing researchers and practitioners with an actionable framework for responsible climate AI.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"215 ","pages":"Article 109102"},"PeriodicalIF":7.9,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148289121","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

Lightweight aggregates sintered from Yellow River dredged sediment and sewage sludge: Mineral phase transformation and pore formation mechanism 黄河疏浚泥沙和污水污泥烧结轻骨料：矿物相变和孔隙形成机制

IF 7.9 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2026-07-15 Epub Date: 2026-06-23 DOI: 10.1016/j.psep.2026.109183

Zhuo Chen, Sha Liang, Zhiming Zhang, Lianzheng Gui, Chenyang Huang, Huabo Duan, Wenbo Yu, Jiakuan Yang

{"title":"Lightweight aggregates sintered from Yellow River dredged sediment and sewage sludge: Mineral phase transformation and pore formation mechanism","authors":"Zhuo Chen, Sha Liang, Zhiming Zhang, Lianzheng Gui, Chenyang Huang, Huabo Duan, Wenbo Yu, Jiakuan Yang","doi":"10.1016/j.psep.2026.109183","DOIUrl":"10.1016/j.psep.2026.109183","url":null,"abstract":"<div><div>In recent years, dredging projects have generated large quantities of dredged sediment (DS), which has a high silica content but limited practical value, posing significant disposal challenges. Herein, we prepared lightweight aggregates derived from Yellow River DS and sewage sludge (SS) by a sintering process. Optimal process conditions were determined through response surface methodology: DS/SS mass ratio of 4:1, 2 wt% sesbania gum (SG) as a co-extrusion additive, 4 wt% Na<sub>2</sub>CO<sub>3</sub> as a fluxing agent, sintering at 1030 °C for 35 min. The lightweight aggregates exhibited balanced performance: a single-particle compressive strength of 2.57 MPa, water absorption of 31.2%, and a bulk density of 0.686 g/cm<sup>3</sup>. During the sintering process, there was a mutual transformation between feldspar phases and SiO<sub>2</sub>. The formation of the molten amorphous phase was the primary factor contributing to the development of aggregates’ strength. Micro-CT results showed that, as the sintering temperature increased, the gradual expansion of the molten liquid phase initially produced a large number of pores smaller than 500 μm; at higher temperature, the coalescence and escape of gas bubbles within the liquid phase leaded to the formation of larger voids. This study provides a feasible pathway for the resource utilization of both DS and SS.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"215 ","pages":"Article 109183"},"PeriodicalIF":7.9,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148313193","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

Experimental study on co-pyrolysis characteristics of oily sludge and waste textiles targeted at the fuel substitution for cement kilns 针对水泥窑燃料替代的含油污泥与废纺织品共热解特性试验研究

IF 7.9 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2026-07-15 Epub Date: 2026-06-30 DOI: 10.1016/j.psep.2026.109226

Chi Jia, Xiaoyan Li, Hui Li, Qing Huang, Liqiu Feng, Mengmeng Cui

{"title":"Experimental study on co-pyrolysis characteristics of oily sludge and waste textiles targeted at the fuel substitution for cement kilns","authors":"Chi Jia, Xiaoyan Li, Hui Li, Qing Huang, Liqiu Feng, Mengmeng Cui","doi":"10.1016/j.psep.2026.109226","DOIUrl":"10.1016/j.psep.2026.109226","url":null,"abstract":"<div><div>Combining utilization of pyrolysis products with fuel substitution in cement production is an innovative approach. While single pyrolysis of oily sludge or waste textiles has been studied, their co-pyrolysis behavior remains unclear. To explore the potential of cement kiln tail gas as the co-pyrolysis medium and assess pyrolysis products as cement alternative fuels, laboratory-scale co-pyrolysis experiments of cold-rolled oily sludge (CROS) and waste textiles (WT) were conducted. Effects of CROS/WT mass ratio, temperature, and atmosphere on product yields and characteristics were investigated. More CROS in the mixture increased oil yield and saturates content in the oil. More WT increased gas and residue yields, aromatics and resins in the oil, and CO content in the gas. A positive synergistic effect occurred only at low levels of WT addition. Under simulated cement kiln-tail gas, a small amount of O<sub>2</sub> raised resin content in the oil and reduced CH<sub>4</sub> and H<sub>2</sub> in the gas. The optimal co-pyrolysis performance was achieved at CROS/WT mass ratio of 8:2, 550 °C, and N<sub>2</sub>/CO<sub>2</sub> atmosphere. The oil and gas yields reached 49.62% and 19.01%; saturates and aromatics contents in the oil were 42.67% and 31.17%; the sum of H<sub>2</sub> and CH<sub>4</sub> contents was 47.74%.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"215 ","pages":"Article 109226"},"PeriodicalIF":7.9,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148384179","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

Highly efficient nitrogen-doped biochar-supported LaCoO3 perovskite catalysts for peroxymonosulfate activation: A dual-radical system for imidacloprid degradation 高效氮掺杂生物炭负载LaCoO3钙钛矿过氧单硫酸盐活化催化剂：双自由基体系降解吡虫啉

IF 7.9 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2026-07-15 Epub Date: 2026-06-30 DOI: 10.1016/j.psep.2026.109220

Yifan Xie, Zhiyi Lai, Kaiyong Wang, Yinshan Xie, Shengchao Yang, Zhiyong Liu, Jianning Wu, Qi Li, Guihua Meng

{"title":"Highly efficient nitrogen-doped biochar-supported LaCoO3 perovskite catalysts for peroxymonosulfate activation: A dual-radical system for imidacloprid degradation","authors":"Yifan Xie, Zhiyi Lai, Kaiyong Wang, Yinshan Xie, Shengchao Yang, Zhiyong Liu, Jianning Wu, Qi Li, Guihua Meng","doi":"10.1016/j.psep.2026.109220","DOIUrl":"10.1016/j.psep.2026.109220","url":null,"abstract":"<div><div>This study reports the incorporation of nitrogen-doped biochar(N-BC) as a support into the LaCoO<sub>3</sub> perovskite structure, demonstrating high catalytic activity for the neonicotinoid insecticide imidacloprid (IMI) in solution through peroxymonosulfate(PMS) activation. The prepared LaCoO<sub>3</sub>/N-BC catalyst achieved near-complete IMI degradation (99.52%) within 40 min. Through Combined quenching experiments and EPR analysis, SO<sub>4</sub><sup>•-</sup> and •OH were unambiguously identified as the dominant reactive oxygen species mediating IMI oxidation. Density functional theory (DFT) calculations demonstrated that anchoring LaCoO<sub>3</sub> onto N-BC significantly enhances peroxymonosulfate adsorption, while the while the La-induced coordination environment facilitates the Co<sup>3+</sup>/Co<sup>2+</sup> redox cycling. Notably, the LaCoO<sub>3</sub>/N-BC catalyst exhibited exceptional stability, maintaining high efficiency across a broad pH range (5–11) and showing strong resistance to common aqueous matrix interferents (e.g. SO<sub>4</sub><sup>2-</sup>, H<sub>2</sub>PO<sub>4</sub><sup>-</sup>, and humic acid). After four consecutive catalytic cycles, the material retained 79.52% IMI degradation efficiency<strong>,</strong> confirming its structural stability and reusability. By liquid chromatography-mass spectrometry (LC-MS) analysis, critical degradation intermediates were characterized, allowing for the elucidation of potential IMI degradation pathways. These findings collectively establish LaCoO<sub>3</sub>/N-BC as a highly efficient and stable catalyst for PMS-activated remediation of IMI-contaminated water.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"215 ","pages":"Article 109220"},"PeriodicalIF":7.9,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148384519","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

Dual-functional nZVI-biochar for simultaneous Pb/As immobilization and soil fertility improvement in co-contaminated farmland: Multi-faceted assessment of performance, mechanisms, and environmental safety 双重功能nzvi -生物炭同时固定化铅/砷和改善土壤肥力：性能、机制和环境安全的多方面评价

IF 7.9 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2026-07-15 Epub Date: 2026-06-23 DOI: 10.1016/j.psep.2026.109185

Tonglin Ma, Yingbo Dong, Kai Meng, Hai Lin

{"title":"Dual-functional nZVI-biochar for simultaneous Pb/As immobilization and soil fertility improvement in co-contaminated farmland: Multi-faceted assessment of performance, mechanisms, and environmental safety","authors":"Tonglin Ma, Yingbo Dong, Kai Meng, Hai Lin","doi":"10.1016/j.psep.2026.109185","DOIUrl":"10.1016/j.psep.2026.109185","url":null,"abstract":"<div><div>The co-contamination of cationic lead (Pb) and anionic arsenic (As) in agricultural soils poses a significant challenge for remediation. This study developed a dual-functional nano zero-valent iron-loaded soybean straw biochar (nZVI/DBC500) material. Under optimal preparation conditions for soybean straw biochar (500°C, 10 °C/min, 2 h), composite materials were simultaneously prepared using tea polyphenols and FeSO₄·7H₂O. Characterization results after loading revealed that the specific surface area of the composite material increased by 5.74 times, the pore volume expanded by 3.5 times, and more reactive sites of nano-zero-valent iron were introduced. nZVI/DBC500 promoted the transformation of Pb and As into residual fraction after application to the weakly alkaline silt loam soil. The immobilization efficiency for Pb and As significantly increased, exceeding 80% for both. Overall immobilization mechanisms include physical entrapment, electrostatic attraction, precipitation, redox reactions, and complexation. In addition, the application of nZVI/DBC500 to soil exerts a positive enhancing effect on both organic matter content and N, P, K nutrients. Under aerobic conditions in the soil, reliable environmental safety can be ensured. Our findings provide a sustainable strategy for the remediation of complexly contaminated farmland, with practical implications for soil safety and agricultural productivity.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"215 ","pages":"Article 109185"},"PeriodicalIF":7.9,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148313192","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

EuroValve: Stable operation of spring-loaded safety valves in gas service through damping and internal modifications EuroValve：通过阻尼和内部修改，在天然气应用中稳定运行弹簧安全阀

IF 7.9 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2026-07-15 Epub Date: 2026-07-01 DOI: 10.1016/j.psep.2026.109229

Gergely Keszthelyi, Jürgen Schmidt, Jens Denecke

{"title":"EuroValve: Stable operation of spring-loaded safety valves in gas service through damping and internal modifications","authors":"Gergely Keszthelyi, Jürgen Schmidt, Jens Denecke","doi":"10.1016/j.psep.2026.109229","DOIUrl":"10.1016/j.psep.2026.109229","url":null,"abstract":"<div><div>Literature models used to model safety valve stability are introduced, with a focus on one-dimensional CFD modelling, and the effective area model to describe the forces acting on the valve. Two possible methods for improving valve stability are identified: increasing the damping with a friction damper and changing the force acting on the valve disk. Five reference measurements and eight measurements with two friction dampers and three inlet line lengths are conducted. These show that with one of the two dampers the safety valve does not close and open according to the international standard in four of the six cases with that device. Numerical simulation of the measured safety valve with additional damping reveals that at 90% of the critical damping, the safety valve opens in a stable manner with all inlet lines up until 5 m. Previous simulation results have found that increasing the effective area increased the stability of the safety valve at the cost of the safety valves closing at lower reseating pressures than required in the standard. Therefore, the theoretical limits to the effective area curve were derived. Simulations found that the curves within this area did not stabilise the valve at inlet lines of one metre.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"215 ","pages":"Article 109229"},"PeriodicalIF":7.9,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148384886","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