Process Safety and Environmental Protection最新文献_第3页

Exploratory review of innovations in basin geometry of a hemispherical solar stills to increase productivity 半球形太阳能蒸馏器盆地几何结构创新的探索性回顾，以提高生产率

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-09-27 DOI: 10.1016/j.psep.2025.107943

Saif Ali Kadhim , Rassol Hamed Rasheed , Ali M. Ashour , Ahmed Mohsin Alsayah , Farhan Lafta Rashid , Abdallah Bouabidi , Walid Aich

{"title":"Exploratory review of innovations in basin geometry of a hemispherical solar stills to increase productivity","authors":"Saif Ali Kadhim , Rassol Hamed Rasheed , Ali M. Ashour , Ahmed Mohsin Alsayah , Farhan Lafta Rashid , Abdallah Bouabidi , Walid Aich","doi":"10.1016/j.psep.2025.107943","DOIUrl":"10.1016/j.psep.2025.107943","url":null,"abstract":"<div><div>Freshwater scarcity poses a serious challenge in many arid and remote regions, necessitating the development of low-cost, sustainable desalination technologies. This review focuses on enhancing the performance of hemispherical solar stills through geometric modifications of the absorber basin. While hemispherical solar stills already benefit from omnidirectional solar capture and efficient condensation due to their dome shape, productivity remains limited by basin-level thermal inefficiencies. To address this, the review categorizes recent innovations into four groups: corrugated basin liners, convex geometries, finned basins, and other unconventional basin shapes. Corrugated designs, especially when combined with reversed solar collectors and wick materials, demonstrated productivity improvements exceeding 90 % and thermal efficiencies over 75 %. Convex configurations—such as stepped convex and hemispherical liners—achieved gains up to 183 % when paired with phase change materials and wicks. Finned basins, optimized for spacing, orientation, and material (notably copper), enhanced heat transfer and evaporation, with some configurations boosting productivity by 74 %. Additional geometries, including concave and stepped-funnel basins, further improved thermal distribution and water output with minimal added complexity. These findings highlight that geometric optimization—particularly when combined with passive or thermal energy storage enhancements—can significantly increase distillate yield and economic viability. Such improvements position hemispherical solar stills as effective and scalable solutions for decentralized freshwater generation in water-stressed environments.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107943"},"PeriodicalIF":7.8,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221895","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 diesel-contaminated soil remediation using silica sol loaded with sodium percarbonate and Fe(II) 过碳酸钠和铁（II）负载硅溶胶修复柴油污染土壤的效果评价

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-09-27 DOI: 10.1016/j.psep.2025.107944

Wei Wei , Mingli Wei , Lei Liu , Yuanyuan Zhang , Yifan Wei , Fei Yin , Ying Zhao , Tingting Zhang

{"title":"Evaluation of diesel-contaminated soil remediation using silica sol loaded with sodium percarbonate and Fe(II)","authors":"Wei Wei , Mingli Wei , Lei Liu , Yuanyuan Zhang , Yifan Wei , Fei Yin , Ying Zhao , Tingting Zhang","doi":"10.1016/j.psep.2025.107944","DOIUrl":"10.1016/j.psep.2025.107944","url":null,"abstract":"<div><div>Sodium percarbonate (SPC, 2Na<sub>2</sub>CO<sub>3</sub>·3 H<sub>2</sub>O<sub>2</sub>) is a strong oxidant widely used in environmental applications, faces challenges in soil remediation due to rapid reactive species release. This study develops two sustained-release components: a sodium percarbonate-based oxidant agent (SPC-SIS) and a ferrous sulfate (FS)-derived catalytic material (FS-SIS). In this system, silica sol (SIS) serves as a carrier for sodium percarbonate and ferrous sulfate, facilitating sustained release of active components. Sodium silicate (SS) and citric acid (CA) were incorporated to pollutants separation and adjust pH, thereby optimizing remediation efficiency. Comprehensive characterization through SEM with elemental mapping, FTIR, and XPS confirmed effective dispersion of SPC and FS within the SIS matrix. Experimental optimization revealed maximum diesel degradation at SPC/SS/FS/CA/SIS molar ratio of 1:0.5:1:1:1. Notably, the SIS-based system-maintained soil physicochemical stability while achieving better remediation efficiency. Free radical scavenging tests and electron paramagnetic resonance (EPR) identified OH· as the dominant oxidative species for diesel degradation, with O<sub>2</sub><sup>-</sup>· participating in Fe<sup>2+</sup>/Fe<sup>3+</sup> redox cycling. This SPC-SIS/FS-SIS system demonstrates significant potential for persistent oxidative remediation of diesel-contaminated soils.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107944"},"PeriodicalIF":7.8,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221927","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

Turning fossil-derived CO2 into value-added chemicals and carbon resources: Thermochemical conversion of microalgae with acid mine drainage sludge 将化石来源的二氧化碳转化为增值化学品和碳资源：微藻与酸性矿山排水污泥的热化学转化

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-09-27 DOI: 10.1016/j.psep.2025.107950

Gihoon Kwon , Kwangsuk Yoon , Jeong Seop Lee , Sang Jun Sim , Hocheol Song

{"title":"Turning fossil-derived CO2 into value-added chemicals and carbon resources: Thermochemical conversion of microalgae with acid mine drainage sludge","authors":"Gihoon Kwon , Kwangsuk Yoon , Jeong Seop Lee , Sang Jun Sim , Hocheol Song","doi":"10.1016/j.psep.2025.107950","DOIUrl":"10.1016/j.psep.2025.107950","url":null,"abstract":"<div><div>Global consumption of fossil resources has increased to meet the growing demand for carbon-based products, including fuels, chemicals, and plastic products, significantly contributing to global warming. This study explored sequestration of fossil-derived atmospheric CO<sub>2</sub> using <em>Chlamydomonas reinhardtii</em> (<em>C. reinhardtii</em>) microalgae and its conversion into value-added products via a thermochemical pathway. Radiocarbon analysis revealed that <em>C. reinhardtii</em>, cultivated in a photobioreactor (PBR), effectively assimilated carbon in the flue gas of a liquefied natural gas (LNG) power plant, exhibiting low modern carbon (pMC) (17 %). Amending acid mine drainage sludge (AMDS) during the pyrolysis of harvested <em>C. reinhardtii</em> enhanced H<sub>2</sub> and CO production. AMDS also reduced pyrogenic oil production at low loading (8:2 of <em>C. reinhardtii</em> to AMDS mass ratio), but at higher loading (3:7), it produced oil with much simplified composition and a notable content of hexadecanenitrile, a high-value chemical. The residual fraction of <em>C. reinhardtii</em> was carbonized into biochar enriched with <em>g</em>-C<sub>3</sub>N<sub>4</sub> structure, while Fe phases in AMDS were transformed into Fe<sup>0</sup> and Fe<sub>9</sub>S<sub>10</sub>. The resulting biochar exhibited strong persulfate activation property for amaranth degradation. These findings represent a practical approach to converting CO<sub>2</sub> into valuable chemicals and environmental catalysts, highlighting its potential for sustainable CO<sub>2</sub> management.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107950"},"PeriodicalIF":7.8,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221928","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

Unravelling the microbial ecosystem based on core environmental factors and bacteria dynamics during cyanobacteria powder amended pig manure co-composting 基于核心环境因子和细菌动态的蓝藻菌粉改性猪粪共堆肥微生物生态系统研究

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-09-27 DOI: 10.1016/j.psep.2025.107949

Yue Li, Mukesh Kumar Awasthi

{"title":"Unravelling the microbial ecosystem based on core environmental factors and bacteria dynamics during cyanobacteria powder amended pig manure co-composting","authors":"Yue Li, Mukesh Kumar Awasthi","doi":"10.1016/j.psep.2025.107949","DOIUrl":"10.1016/j.psep.2025.107949","url":null,"abstract":"<div><div>This study reveals the effect of cyanobacteria dehydrated powder (CDP) amendment on core environmental factors and bacteria dynamics during the pig manure (PM) composting. The composting was carried out with the participation of six different concentrations of CDP mixed with PM+ wheat straw (0 %, 2.5 %, 5 %, 7.5 %, 10 %, 20 %, and marked T1 to T6, respectively). Results indicated that the succession of bacterial abundance was first slightly decline and then steady, where the three dominant phyla, <em>Firmicutes</em> (30.54–74.75 %), <em>Bacteroidota</em> (3.8–33.84 %) and <em>Proteobacteria</em> (8.14–19.75 %) were noticed. CDP amendment was increased the abundance of <em>Sinibacillus</em> (Max. 5.91 times), and important role play in the humification process. Organic matter-degrading bacterial genus <em>Bacillus</em> (1.33–2.9 times) and <em>Fermentimonas</em> (2.07–6.02 times) were further activated on the basis of indigenous microbial succession. The increase of β-diversity was showed that CDP as a sort of biomass mainly working after mesophilic phase. The highest P/N value of 2.78 and the largest number of nodes and edges (243 nodes/ 2860 edges) of T4 have been recorded by co-occurrence network. Mantel test show that the three dominant phyla have complex correlation with environmental factors on biochar applied treatments. CDP amended PM co-composting promotes the abundance of mature bacterial genera <em>Fermentimonas</em>, and reflects its promising role in mature stage.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107949"},"PeriodicalIF":7.8,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221929","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

Mechanisms of Al2O3 nanofluids affecting coal wettability and gas adsorption-desorption under different pH conditions: Molecular simulation and experimental study 不同pH条件下Al2O3纳米流体对煤润湿性和气体吸附-解吸的影响机理：分子模拟与实验研究

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-09-27 DOI: 10.1016/j.psep.2025.107952

Xianfeng Liu , Linfan Qi , Baisheng Nie , Chuang Li , Han Han , Chengyi He , Jialiang Li , Xueqi Jia , Zhongbei Li

{"title":"Mechanisms of Al2O3 nanofluids affecting coal wettability and gas adsorption-desorption under different pH conditions: Molecular simulation and experimental study","authors":"Xianfeng Liu , Linfan Qi , Baisheng Nie , Chuang Li , Han Han , Chengyi He , Jialiang Li , Xueqi Jia , Zhongbei Li","doi":"10.1016/j.psep.2025.107952","DOIUrl":"10.1016/j.psep.2025.107952","url":null,"abstract":"<div><div>Coal dust pollution during mining is a major cause of occupational diseases. Although hydraulic fracturing is widely applied for coalbed methane extraction, poor coal wettability, limited dust suppression, and low gas desorption restrict its efficiency. This study prepares Al<sub>2</sub>O<sub>3</sub> nanofluids with varying pH values and concentrations and investigates their dispersion and effects on coal surface modification, wettability, oxygen-containing functional groups, and gas adsorption-desorption behavior. Molecular dynamics simulations, contact angle measurements, zeta potential analysis, mercury intrusion porosimetry, methane adsorption, ESEM, and FTIR are employed. In the Coal/Al<sub>2</sub>O<sub>3</sub>/H<sub>2</sub>O system, the adsorption layer thickness increases to 32.96 Å, a 44.43 % rise compared with Coal/H<sub>2</sub>O. Acidic nanofluids maintain good dispersion for 48 h, whereas alkaline solutions precipitate easily. Increasing Al<sub>2</sub>O<sub>3</sub> concentration significantly enhances coal wettability, with the contact angle decreasing by 65.7 % at pH 3 and 4.00 wt%. Both acidic and alkaline treatments increase surface oxygen-containing functional groups, negatively correlating with the coal-water contact angle, while the contact angle positively correlates with gas adsorption. Acidic corrosion alters coal microstructure and promotes macropore expansion. The synergistic \"dispersion–wettability–corrosion\" mechanism effectively enhances coal wettability and gas desorption. This study provides theoretical and practical guidance for improving wettability and efficient gas extraction in high-gas coal seams.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107952"},"PeriodicalIF":7.8,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221930","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

Current decay mitigation through optimized electric field control modes in sludge electro-dewatering 通过优化电场控制模式缓解污泥电脱水中的电流衰减

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-09-26 DOI: 10.1016/j.psep.2025.107947

You Li , Miaomiao Zhao , Xianfu Sun , Ao Liu , Xuan Xu , Liying Wang , Degang Ma

{"title":"Current decay mitigation through optimized electric field control modes in sludge electro-dewatering","authors":"You Li , Miaomiao Zhao , Xianfu Sun , Ao Liu , Xuan Xu , Liying Wang , Degang Ma","doi":"10.1016/j.psep.2025.107947","DOIUrl":"10.1016/j.psep.2025.107947","url":null,"abstract":"<div><div>Electro-dewatering technology has attracted attention in sludge treatment due to its rapid dewatering kinetics, chemical-free operation, and low energy consumption. However, the traditional constant voltage mode is constrained by rapid current decay, impacting efficiency and increasing energy usage. This study proposed two electric field control modes, segmented voltage mode and constant current to constant voltage mode, to address this decay. The experiment evaluated current stability, thermal effects, and dewatering performance. Results indicate that the segmented voltage mode mitigated current decay by implementing stepwise ascending voltage, lowering current standard deviation from 2.17 to 0.59, achieving 48.60 % sludge moisture content at 0.188 kWh·kg⁻¹. The constant current to constant voltage mode further enhanced current stability, achieving 0.45 current standard deviation and 47.85 % moisture content at 0.178 kWh·kg⁻¹. Furthermore, quadratic regression models were developed to correlate process parameters with dewatering performance. Optimization of weighting coefficients for the dewatering effect (<span><math><msub><mrow><mi>W</mi></mrow><mrow><mi>a</mi></mrow></msub></math></span>) and energy consumption constraint (<span><math><msub><mrow><mi>W</mi></mrow><mrow><mi>b</mi></mrow></msub></math></span>) achieved the optimal balance between process performance and energy expenditure. This study aims to enhance electrical field control modes by accurately adjusting current to address the challenges posed by current decay on dewatering efficiency, offering a practical solution for optimizing electro-dewatering technology.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107947"},"PeriodicalIF":7.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221931","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

Technology roadmap of low-carbon hydrogen: Trends for risk management strategies 低碳氢技术路线图：风险管理战略的趋势

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-09-26 DOI: 10.1016/j.psep.2025.107937

Danielle Rodrigues de Moraes , Laene Oliveira Soares , Vanessa de Almeida Guimarães , Daniel Cerqueira Lima e Penalva Santos , Ronney Arismel Mancebo Boloy

{"title":"Technology roadmap of low-carbon hydrogen: Trends for risk management strategies","authors":"Danielle Rodrigues de Moraes , Laene Oliveira Soares , Vanessa de Almeida Guimarães , Daniel Cerqueira Lima e Penalva Santos , Ronney Arismel Mancebo Boloy","doi":"10.1016/j.psep.2025.107937","DOIUrl":"10.1016/j.psep.2025.107937","url":null,"abstract":"<div><div>This study employs a Technology Roadmap (TRM) to characterise the low-carbon hydrogen network across time horizons and identify supply chain risk management (SCRM) trends, key players and factors to expand the low-carbon hydrogen economy. A key novelty lies in assessing technological trends through decarbonisation risks. By focusing on transition-specific risks, TRM supports identifying technological vulnerabilities and strategic decisions on production, storage, transport, and investment under uncertainty. Data from 22 granted patents, 77 pending patents, and 50 articles outlined trends and gaps over time. Operational risk management and alkaline electrolysis had great intellectual property interest at short-term. Medium-term trends showed broader SCRM aspects (e.g., quality assurance, failure prevention and monitoring) and greater circular economy focus than short- and long-term. Long-term roadmap highlighted international efforts to scale hydrogen via cost-effective and exergetic-efficient supply chains across sectors. Key management strategies include addressing human error, improving real-time monitoring, decentralised production based on regional factors (spatial resolution), flexible assets, and integrating waste-to-energy applications. Policies should target electrolysis efficiency, advanced storage, safety control, biofuels integration, and large-scale solutions to mitigate renewable intermittency. Future research should optimise failure prevention, predictive maintenance, emergency response, ventilation and obstacle design, and proper operational training. Alternative biofuels (e.g., ethanol, glycerine, biogas) as scalable inputs and recyclability remain underexplored. It is expected to provide insights to strengthen hydrogen economy and energy transition.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107937"},"PeriodicalIF":7.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227429","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 treatment of fracturing flowback fluids using bioflocculant-modified fly ash cenospheres: Process optimization and mechanism analysis 生物絮凝剂改性粉煤灰微球强化处理压裂返排液：工艺优化与机理分析

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-09-26 DOI: 10.1016/j.psep.2025.107938

Juan Sun , Wenhui Zhang , Shuixiang Xie , Shuangxin Shi , Ziwei Du , Fang Liu , Qiyou Liu , Chunshuang Liu

{"title":"Enhanced treatment of fracturing flowback fluids using bioflocculant-modified fly ash cenospheres: Process optimization and mechanism analysis","authors":"Juan Sun , Wenhui Zhang , Shuixiang Xie , Shuangxin Shi , Ziwei Du , Fang Liu , Qiyou Liu , Chunshuang Liu","doi":"10.1016/j.psep.2025.107938","DOIUrl":"10.1016/j.psep.2025.107938","url":null,"abstract":"<div><div>Hydraulic fracturing produces complex organic wastewater, known as fracturing flowback fluid (FFF), which contains refractory pollutants and poses risks of secondary contamination, thereby challenging conventional treatment methods. This study developed an environmentally sustainable strategy using a microbial flocculant (MBF) synthesized from <em>Bacillus paramycoides</em> YQ1—a strain isolated from FFF—in combination with candelilla wax- modified fly ash cenospheres (CWFACs). Through process optimization, the MBF yield was increased from 4.38 to 5.78 g·L⁻¹ , and its flocculation efficiency improved from 60.06 % to 87.84 %. Under optimal conditions, MBF alone achieved removal rates of 86.67 % for chroma, 81.98 % for suspended solids (SS) removal, and 65.13 % for oil, along with effective degradation of polycyclic aromatic hydrocarbons (PAHs). The integrated MBF-CWFACs system demonstrated enhanced performance, attaining 88.50 % chroma removal, 96.29 % SS removal, and 95.30 % oil removal. Mechanistic analysis revealed synergistic effects between bioflocculation and adsorption processes. This integrated approach offers a sustainable solution for FFF treatment, addressing both process efficiency and environmental safety concerns, providing insights for developing eco-friendly wastewater treatment technologies in the petroleum industry.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107938"},"PeriodicalIF":7.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221924","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

Exceptional nitrate and phosphate removals from low carbon-to-nitrogen ratio wastewater with a novel pyrite-sulfur composite filler 新型硫铁矿-硫复合填料对低碳氮比废水中硝酸盐和磷酸盐的去除效果优异

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-09-26 DOI: 10.1016/j.psep.2025.107941

Hongliang Guo , Shuyu Wang , Chongyin Zhu , Jo-Shu Chang , Duu-Jong Lee

{"title":"Exceptional nitrate and phosphate removals from low carbon-to-nitrogen ratio wastewater with a novel pyrite-sulfur composite filler","authors":"Hongliang Guo , Shuyu Wang , Chongyin Zhu , Jo-Shu Chang , Duu-Jong Lee","doi":"10.1016/j.psep.2025.107941","DOIUrl":"10.1016/j.psep.2025.107941","url":null,"abstract":"<div><div>This study developed a pyrite-coupled sulfur autotrophic (PSAD) with a novel sulfur/pyrite composite filler to remove nitrogen and phosphorus at exceptional rates from wastewater of a low C/N ratio. The composite filler (radius 2.5 mm) was made by mixing the pyrite and sulfur powders at a volume ratio of 2:1, followed by melting with rapid stirring at 170℃ and cooling naturally. Three PSAD reactors with different sulfur/pyrite packings were tested: R1, which applied distinct layers of sulfur and pyrite particles; R2, which mixed the sulfur and pyrite particles in the filler; and R3, which employed the yielded pyrite-sulfur composite filler. The R3 demonstrated superior nutrient removals than R1 and R2, reaching 98.8 % total nitrogen and 96.2 % total phosphorus at a steady-state test of a hydraulic retention time of 12 h. The sulfate generated by R3 was 18.2 % less than the theoretical value of the sulfur autotrophic denitrification. The tested pyrite-sulfur composite filler provides more attachment sites, increasing the abundances of functional microorganisms for nitrogen, sulfur, and iron cycling, including <em>Thiobacillus</em> (73.7 % in R3 than 62.1 % in R1 and 64.5 % in R2), <em>Ferritrophicum</em> (11.7 % in R3 than 7.74 % in R1 and 8.66 %), and <em>Geothrix</em> (3.04 in R3 than 2.22 % in R1 and 2.47 % in R2). These microbes were claimed to collaboratively employ sulfur-based and pyrite-driven metabolic routes to achieve denitrification while promoting iron redox cycling (Fe²⁺/Fe³⁺ transformations) that facilitated the synergistic removal of phosphorus through combined adsorption and potential precipitation processes.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107941"},"PeriodicalIF":7.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221926","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

Few-shot chemical process fault diagnosis based on fused self-supervised contrastive learning 基于融合自监督对比学习的小次化工过程故障诊断

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-09-25 DOI: 10.1016/j.psep.2025.107939

Youqiang Chen , Ridong Zhang , Furong Gao

{"title":"Few-shot chemical process fault diagnosis based on fused self-supervised contrastive learning","authors":"Youqiang Chen , Ridong Zhang , Furong Gao","doi":"10.1016/j.psep.2025.107939","DOIUrl":"10.1016/j.psep.2025.107939","url":null,"abstract":"<div><div>In recent years, the field of chemical process fault diagnosis based on deep learning has grown rapidly. Compared with traditional methods, deep learning models are able to learn more complex data patterns and are more suitable for modern complex industrial systems. However, deep learning in the field of chemical process fault diagnosis still faces the challenge of insufficient sample size of chemical fault data. To address the problem of insufficient fault data samples in real chemical processes, this paper proposes a Fusion Self-Supervised Contrastive Learning for Fault Diagnosis (FSSCL). Firstly, this method proposes a self-supervised model for feature recovery and a contrastive learning model for sample classification, which are pre-trained for extracting intra-sample data features and inter-sample data discrepancy features, respectively; then, the trained model is fused using feature fusion technique to stitch and merge the extracted features from the two models to deliver them to the classifier for classification. The experiments on the Coke furnace process and the Tennessee Eastman chemical process show that the FSSCL method can still achieve high fault diagnosis accuracy with a small number of samples, which effectively solves the problem that the traditional fault diagnosis model is difficult to be trained in the face of a few-shot dataset and is easy to be overfitted.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107939"},"PeriodicalIF":7.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182894","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}

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