Process Safety and Environmental Protection最新文献

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Recent advances in ultrasound-assisted CO2 absorption/desorption processes: A review
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-24 DOI: 10.1016/j.psep.2025.107050
Maryam Dehbani , Masoud Rahimi
{"title":"Recent advances in ultrasound-assisted CO2 absorption/desorption processes: A review","authors":"Maryam Dehbani ,&nbsp;Masoud Rahimi","doi":"10.1016/j.psep.2025.107050","DOIUrl":"10.1016/j.psep.2025.107050","url":null,"abstract":"<div><div>In the last decades, many researchers from around the world have made great efforts to find a highly efficient, low energy consumption, and definitely, environmentally friendly technique for CO<sub>2</sub> capture. Ultrasound-assisted absorption/ desorption processes is the subject of the present review. The use of ultrasound irradiations has emerged as one of the useful improving approaches in terms of heat and mass transfer enhancement as well as reduction in regeneration energy consumption by allowing the process to be performed at lower temperatures than the conventional method. In just over a decade, some various studies on sono-assisted absorption/desorption processes have been carried out, all of which have reported the brilliant results in terms of mass transfer enhancement and energy saving. Some unique phenomena induced by ultrasound including acoustic cavitation, acoustic fountain, atomization, and free radical production are responsible for its fantastic effects on CO<sub>2</sub> absorption and desorption performance. This paper summarizes the research literature regarding the application of ultrasound interference in CO<sub>2</sub> absorption/desorption systems published since the start of research in this field. Assessment of different contributing factors, scalability and research gaps have also been addressed.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107050"},"PeriodicalIF":6.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724669","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
Prediction model for coal chemical wastewater quality after catalytic ozonation process treatment based on deep learning algorithm: Performance evaluation and model comparisons
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-24 DOI: 10.1016/j.psep.2025.107059
Yihe Qin , Run Yuan , Xuewei Zhang , Xuwen He
{"title":"Prediction model for coal chemical wastewater quality after catalytic ozonation process treatment based on deep learning algorithm: Performance evaluation and model comparisons","authors":"Yihe Qin ,&nbsp;Run Yuan ,&nbsp;Xuewei Zhang ,&nbsp;Xuwen He","doi":"10.1016/j.psep.2025.107059","DOIUrl":"10.1016/j.psep.2025.107059","url":null,"abstract":"<div><div>In this study, we tested different models for predicting the effluent water quality of coal chemical wastewater treated by the catalytic ozonation process. The optimal model was further modified using the norm feature vector selection methods and intelligent algorithms. The average removal amount and average removal rate of COD in coal chemical wastewater treated by catalytic ozonation process were 223.62 mg/L and 57.98 %, respectively. AAO-pH, AAO-ammonia nitrogen, AAO-total phosphorus, AAO-COD, AAO-total phenol, SST- COD, SST-total phenol, and SST-turbidity were inputs for each model, while the catalytic ozonation-COD was used as the output for each model. We collected 500 samples of one year for the training, validation, and testing of various models. Compared to other models, the RF model had better predictive performance. Additionally, L1 method had a stronger optimization ability for the RF model than L2 method. Compared with BOA and SSA, IGWO had a larger contribution to improving the predictive ability. The L1-RF-IGWO model showed the best predictive ability (test set R<sup>2</sup> of 0.8717). The present results can aid coal chemical plants achieve data-driven management of water quality prediction and monitoring, providing ideas for the construction of models for predicting water quality in engineering.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107059"},"PeriodicalIF":6.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747972","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
Characteristics of CO2 gasification reaction and biochar structure evolution of rice straw in K2CO3-Na2CO3-Li2CO3 ternary molten salt
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-23 DOI: 10.1016/j.psep.2025.107051
Hui She , Peng Lv , Xuanxuan He , Yonghui Bai , Jiaofei Wang , Xudong Song , Weiguang Su , Juntao Wei , Guangsuo Yu
{"title":"Characteristics of CO2 gasification reaction and biochar structure evolution of rice straw in K2CO3-Na2CO3-Li2CO3 ternary molten salt","authors":"Hui She ,&nbsp;Peng Lv ,&nbsp;Xuanxuan He ,&nbsp;Yonghui Bai ,&nbsp;Jiaofei Wang ,&nbsp;Xudong Song ,&nbsp;Weiguang Su ,&nbsp;Juntao Wei ,&nbsp;Guangsuo Yu","doi":"10.1016/j.psep.2025.107051","DOIUrl":"10.1016/j.psep.2025.107051","url":null,"abstract":"<div><div>The integration of solar molten salt thermal storage with biomass thermochemical conversion is a viable strategy for generating clean and renewable energy. Molten salt offers substantial benefits in catalysis and heat transfer, which are indispensable in gasification processes. However, achieving sufficient mixing of the gaseous atmosphere with the liquid-solid phase is challenging. In this study, a laboratory-scale slurry-bed reactor was utilized to ensure efficient mixing of the three phases. The evolution of product distribution and biochar structure during rice straw gasification in a K<sub>2</sub>CO<sub>3</sub>-Na<sub>2</sub>CO<sub>3</sub>-Li<sub>2</sub>CO<sub>3</sub> molten salt mixture, under conditions emulating practical applications, was examined. High-temperature stage microscopy (HTSM) was used to observe the real-time morphological evolution of the biomass molten salt gasification process, providing valuable insights into its reaction properties. The findings suggest that the biomass molten salt gasification process is predominantly divided into three stages: encapsulation, erosion, and fragmentation. Compared to traditional gasification methods, molten salt gasification shows superior reactivity, leading to an increased gasification reaction rate. This enhancement is mainly due to the catalytic effects of alkali and alkaline earth metals within the molten salt, along with the exceptional heat transfer capabilities of the liquid medium. Moreover, this approach significantly increased syngas yield from 30.07 % to 50.62 % and reduced tar yield from 26.59 % to 23.72 % within a 15 min gasification period. Additionally, the structure of the biochar was improved, resulting in a larger specific surface area, which increased by 242.56 % at 5 min of gasification. The yields of H₂ and CO produced by gasification of biomass in molten salt for 15 min were 3.55 mmol/g biomass and 12.98 mmol/g biomass, respectively.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107051"},"PeriodicalIF":6.9,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Collagen modification and coordination reaction of diketone dicarboxylic acid as high exhaustion chromium tanning agent: Experimental and DFT simulations
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-23 DOI: 10.1016/j.psep.2025.107053
Yu Zhu , Yiyue Shen , Ying Wang , Huimin Zhao , Jinli Wei , Haoyuan Chen , Maroosha Javed , Linghua Zhuang , Guowei Wang
{"title":"Collagen modification and coordination reaction of diketone dicarboxylic acid as high exhaustion chromium tanning agent: Experimental and DFT simulations","authors":"Yu Zhu ,&nbsp;Yiyue Shen ,&nbsp;Ying Wang ,&nbsp;Huimin Zhao ,&nbsp;Jinli Wei ,&nbsp;Haoyuan Chen ,&nbsp;Maroosha Javed ,&nbsp;Linghua Zhuang ,&nbsp;Guowei Wang","doi":"10.1016/j.psep.2025.107053","DOIUrl":"10.1016/j.psep.2025.107053","url":null,"abstract":"<div><div>High exhaustion chromium tannage is an important method to curb the environmental pollution of traditional chrome tanning process. One diketone dicarboxylic acid, 3,3-diacetyl-pentanedioic acid (DAPA) was proposed and applied for high exhaustion chromium tanning process. The chromium content of effluent liquor from DAPA-4 method (394.8 mg·L<sup>−1</sup>) was much lower than that of Control method (1223.7 mg·L<sup>−1</sup>). Chromium uptake ratio of DAPA-4 method (90.13 %) was much higher than that of Control method (69.41 %). The tensile strength (Ts), tearing strength, and bursting strength values of leather sample from DAPA-4 method were higher than those of Control method. COD and TDS of effluent liquor from DAPA-4 method was 2193.0 mg/L and 30154.0 mg/L. The high exhaustion chromium tanning mechanism of DAPA including collagen modification and coordination reaction was analyzed from experimental and Density Functional Theory (DFT) simulations. Chemical reaction between diethyl-3,3-diacetylpentanedioate (DAPD) and guanidine carbonate resulted as pyrimidine derivative (4,6-dimethyl-2-imino-5,5-diethyl-acetate-pyrimidine, MDES). Collagen modification of DAPA upon white hide powder was determined. The effect of molar ratio, temperature, and pH value on coordination products formed between DAPA and trivalent chromium ion was analyzed. The β-dicarbonyl group of DAPA will react with guanidine group of arginine (Arg) to form a pyrimidine derivative, which result in collagen modification and introduce two carboxylic acid (-COOH) groups into collagen fiber. The introduction of -COOH group into collagen enhances the chromium uptake. This work will shed light on design and preparation of high exhaustion chromium tanning agent, also show practical application for sustainable chrome-less leather production.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107053"},"PeriodicalIF":6.9,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724283","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
Advanced oxidation processes for the removal of artificial sweeteners from aqueous environments: A comprehensive review
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-23 DOI: 10.1016/j.psep.2025.107049
Jiayin Liu, Qi Jiang, Shaobo Chen, Rui Yang, Menghao Fang, Zhongjun Xu
{"title":"Advanced oxidation processes for the removal of artificial sweeteners from aqueous environments: A comprehensive review","authors":"Jiayin Liu,&nbsp;Qi Jiang,&nbsp;Shaobo Chen,&nbsp;Rui Yang,&nbsp;Menghao Fang,&nbsp;Zhongjun Xu","doi":"10.1016/j.psep.2025.107049","DOIUrl":"10.1016/j.psep.2025.107049","url":null,"abstract":"<div><div>Artificial sweeteners (ASs) are widely detected in aquatic environments due to their high solubility and long half-lives. The growing concern regarding their environmental persistence and potential risks to human health highlights the need for effective treatment technologies. Advanced oxidation processes (AOPs) have emerged as promising methods for ASs removal, offering energy efficiency and the potential for complete mineralization. It emphasized the effectiveness, degradation pathways and influencing factors associated with photocatalytic oxidation, electrocatalytic oxidation and ozonation, as well as their synergistic application with Fenton and persulfate oxidation. The integration of light and electrical energy significantly enhanced the activation of oxidants, leading to efficient and rapid degradation. Ozone showed substantial potential due to its ability to generate a high amount of hydroxyl radicals upon activation. This review summarizes common ASs and their removal by AOPs. Considering removal efficiencies, it is suggested that ASs with a bicyclic structure is more suitable for synergistic AOPs removal. Challenges include the stability of bicyclic structures and prolonged treatment time. Future research should focus on optimizing reaction systems and scaling up these processes for practical applications.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107049"},"PeriodicalIF":6.9,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748127","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
One stone, three birds: Recovery of high-quality niobium and iron products from niobium-bearing tailings using low-temperature fluidized hydrogen reduction technology
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-23 DOI: 10.1016/j.psep.2025.107055
Jiahao He , Zihang Wang , Ping Zhao , Shuai Yuan , Peng Gao , Zhidong Tang
{"title":"One stone, three birds: Recovery of high-quality niobium and iron products from niobium-bearing tailings using low-temperature fluidized hydrogen reduction technology","authors":"Jiahao He ,&nbsp;Zihang Wang ,&nbsp;Ping Zhao ,&nbsp;Shuai Yuan ,&nbsp;Peng Gao ,&nbsp;Zhidong Tang","doi":"10.1016/j.psep.2025.107055","DOIUrl":"10.1016/j.psep.2025.107055","url":null,"abstract":"<div><div>Over 98 % of global niobium production is controlled by just two countries, leading to potential supply risks. The Bayan Obo tailings contain significant amounts of strategic minerals, including iron and niobium. However, the current processes struggle to efficiently recover niobium from these resources. This study innovatively proposes a low-temperature fluidized hydrogen reduction process to treat niobium-bearing tailings from Bayan Obo. Under the optimal parameters of reduction temperature of 475 °C, reduction time of 30 min, and H<sub>2</sub> concentration of 20 %, the reduction product was subjected to magnetic separation. This yielded iron concentrates with 68.27 wt% TFe and a recovery of 96.58 wt%, and niobium products with 17.55 wt% Nb<sub>2</sub>O<sub>5</sub> and a recovery of 90.51 wt%. The niobium enrichment ratio reached 5.48. The primary alteration observed in the niobium-bearing tailings during the reduction process is the reduction of hematite to magnetite, exhibiting no phase transformation of the niobium-bearing minerals. During this process, the product exhibited enhanced magnetism, an elevated Fe<sup>2 +</sup> content, and the formation of new pores. When the reduction temperature was excessive or the reduction time was unduly prolonged, magnetite was over-reduction to wüstite, resulting in a decrease of magnetism and porosity, which adversely affected on subsequent magnetic separation. At 600 °C, the formation of Fe<sub>2</sub>TiO<sub>5</sub> was also observed. This process not only employs hydrogen as a replacement for carbon as a reducing agent to produce high-quality niobium and iron products, but also provides a novel approach for processing analogous iron-bearing tailings, polymetallic ores, and solid waste resources.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107055"},"PeriodicalIF":6.9,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724284","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
Investigating the impact of electric vehicle range on use-phase carbon footprint: A life cycle assessment approach
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-23 DOI: 10.1016/j.psep.2025.107044
Xin Lai , Junjie Chen , Quanwei Chen , Bo Tang , Yuejiu Zheng , E Cheng
{"title":"Investigating the impact of electric vehicle range on use-phase carbon footprint: A life cycle assessment approach","authors":"Xin Lai ,&nbsp;Junjie Chen ,&nbsp;Quanwei Chen ,&nbsp;Bo Tang ,&nbsp;Yuejiu Zheng ,&nbsp;E Cheng","doi":"10.1016/j.psep.2025.107044","DOIUrl":"10.1016/j.psep.2025.107044","url":null,"abstract":"<div><div>As the range of battery electric vehicles (BEVs) increases, the carbon footprint generated during the use phase is rarely investigated and compared. The carbon footprint of BEVs with different ranges during the use phase is quantified and analyzed using the life cycle assessment (LCA) method to explore the optimal range from a low-carbon perspective. The study comprehensively considers the battery deadweight, charging and discharging cycle efficiency energy loss, and abatement portion of the kinetic energy recovery system (KERS) in the carbon footprint accounting. Results show that: (1) At the range of 300 km and above, the carbon footprint from the self-weight of batteries is more significant than due to charge/discharge cycles. (2) A KERS carbon abatement analysis based on the established 15 driving conditions is performed, in which the initial speed is the most influential parameter. (3) Carbon footprint varies considerably from vehicle type and positively correlates with the charge/discharge rate. (4) A range of 500–600 km is the best choice for BEVs in northern China, considering the range and low carbon requirement at low temperatures. Reliable data references for automobile manufacturers and policy decision-makers are provided to promote BEVs' sustainable development and policy formulation science.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107044"},"PeriodicalIF":6.9,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724285","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
Development and performance analysis of structural lightweight aggregate self-compacting concrete: A sustainable solution
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-23 DOI: 10.1016/j.psep.2025.107052
Pawan Kumar, Pasla Dinakar, T. Jothi Saravanan
{"title":"Development and performance analysis of structural lightweight aggregate self-compacting concrete: A sustainable solution","authors":"Pawan Kumar,&nbsp;Pasla Dinakar,&nbsp;T. Jothi Saravanan","doi":"10.1016/j.psep.2025.107052","DOIUrl":"10.1016/j.psep.2025.107052","url":null,"abstract":"<div><div>The use of coarse sintered fly ash aggregates (SFA) in lightweight concrete offers an innovative approach to reducing a dead load of structures while self-compacting concrete (SCC) enhances workability by facilitating effortless pouring and eliminating construction difficulties. Investigating the integration of lightweight aggregate (LWA) in SCC is a growing field of research. Attaining this objective establishes a logical mix design approach for LWA-SCC by optimizing the packing process, efficiently utilizing SFA, and preserving natural building materials, thereby supporting low-carbon, eco-friendly, and sustainable development. This study investigates the impact of incorporating coarse SFA on the fundamental workability (slump flow, T500, L-Box, and V-funnel), mechanical properties (compressive strength, tensile strength, and direct shear), and long-term performance (rapid chloride penetration, capillary absorption, and acid resistance) of LWA-SCC, using different proportions of fly ash (FA) and ground granulated blast furnace slag (GGBS). Seven SCC mixes were designed, including one control SCC mix (CSFA). The other six LWA-SCC mixtures were divided into two groups, Group A and Group B, with partial replacements of FA and GGBS at 30 %, 50 %, and 70 %, respectively. The findings confirmed the suitability of the proposed method, as the developed LWA-SCC mixes exhibited a slump flow ranging from 650 to 750 mm and a compressive strength varying between 27 and 52 N/mm<sup>2</sup>. FTIR and XRD analyses further validated the formation of hydration products, including C-A-S-H phases. Additionally, the results highlighted that incorporating mineral admixtures in green LWA-SCC mixtures offers substantial environmental benefits.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107052"},"PeriodicalIF":6.9,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724304","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
Corrosion resistance properties and protective mechanisms of Al2O3-doped Inconel 625 coatings prepared by laser cladding in high-temperature acidic environments
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-23 DOI: 10.1016/j.psep.2025.107057
Xuming Wu , Zhaohui Wang , Bin Li , Heng Tao , Chenchen Zhao , Yufeng Wu
{"title":"Corrosion resistance properties and protective mechanisms of Al2O3-doped Inconel 625 coatings prepared by laser cladding in high-temperature acidic environments","authors":"Xuming Wu ,&nbsp;Zhaohui Wang ,&nbsp;Bin Li ,&nbsp;Heng Tao ,&nbsp;Chenchen Zhao ,&nbsp;Yufeng Wu","doi":"10.1016/j.psep.2025.107057","DOIUrl":"10.1016/j.psep.2025.107057","url":null,"abstract":"<div><div>This study investigates the corrosion resistance and protective mechanisms of laser-clad Al<sub>2</sub>O<sub>3</sub>-doped Inconel 625 coatings under high-temperature acidic conditions. Inconel 625-xAl<sub>2</sub>O<sub>3</sub> coatings were fabricated via laser cladding and tested in high-temperature acidic environments simulating pipeline conditions. Corrosion media included HCl, H<sub>2</sub>SO<sub>4</sub>, HF, HBr (pH=3), and their 1:1:1:1 mixed acid. High-temperature cyclic titration was employed for corrosion testing, while XRD, SEM, EDS, and laser confocal microscopy were used to analyze microstructure, composition, and corrosion products. Results show that increasing Al<sub>2</sub>O<sub>3</sub> content significantly enhances corrosion resistance, reducing rates by 57.9 % in HCl and 46.4 % in HF. Al<sub>2</sub>O<sub>3</sub> forms a stable protective layer, acting as a physical barrier and inhibiting grain growth. A dual-layer oxide film (Al<sub>2</sub>O<sub>3</sub> and Cr<sub>2</sub>O<sub>3</sub>) effectively blocks corrosive substance diffusion, further enhancing protection. This study elucidates the pivotal role of Al<sub>2</sub>O<sub>3</sub> in improving the corrosion resistance of Inconel 625 coatings and offers novel insights for the development of high-performance protective coatings tailored for extreme environments.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107057"},"PeriodicalIF":6.9,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724671","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
Degradation efficiencies of selected organic pesticides in aqueous solution using various advanced oxidation techniques
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-23 DOI: 10.1016/j.psep.2025.107048
Yuliang Zhu , Yucan Liu , Ke Yu , Jinlin Guo , Xianguo Ji , Xinyi Xu , Yan Zhang , Yuxia Wang , Jinming Duan , Hongwei Sun
{"title":"Degradation efficiencies of selected organic pesticides in aqueous solution using various advanced oxidation techniques","authors":"Yuliang Zhu ,&nbsp;Yucan Liu ,&nbsp;Ke Yu ,&nbsp;Jinlin Guo ,&nbsp;Xianguo Ji ,&nbsp;Xinyi Xu ,&nbsp;Yan Zhang ,&nbsp;Yuxia Wang ,&nbsp;Jinming Duan ,&nbsp;Hongwei Sun","doi":"10.1016/j.psep.2025.107048","DOIUrl":"10.1016/j.psep.2025.107048","url":null,"abstract":"<div><div>The pervasive contamination of water resources by persistent organic pesticides necessitates the development of efficient water purification technologies. This study aims to evaluate and compare the performance of five different oxidation techniques (KMnO<sub>4</sub>, NaClO, K<sub>2</sub>S<sub>2</sub>O<sub>8</sub> (PS), Fenton, and UV/PS processes) for the simultaneous removal of six typical organic pesticides (cyromazine, dinotefuran, chloridazon, atrazine, diuron, and tebuconazole) from aqueous solutions. Experimental trials were systematically conducted across a range of oxidant concentrations and solution pH conditions, with degradation kinetics analyzed using pseudo-first-order kinetic models. Molecular reactivity was further probed using density functional theory (DFT) to identify key degradation sites. Results demonstrated that conventional oxidants (KMnO<sub>4</sub>, NaClO, K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>) exhibited limited removal efficiency for organic pesticides ( removal rate &lt; 50 %), which is attributed to the structural recalcitrance and reactive oxygen species (ROS) competition of the selected pesticides in mixed pesticide aqueous solution. The Fenton process achieved moderate removal (60 %–85 %) under acidic conditions (pH=3) but required strict H<sub>2</sub>O<sub>2</sub>/Fe<sup>2+</sup> stoichiometry (mass ratio 2:1) and generated operational challenges from sludge formation. In contrast, the UV/PS process demonstrated exceptional removal efficiencies (&gt; 95 %) for selected organic pesticides at neutral pH, even with a minimal K<sub>2</sub>S<sub>2</sub>O<sub>8</sub> dosage of 2.0 mg·L<sup>−1</sup>, supported by rapid reaction kinetics. DFT calculations revealed chlorine atoms as nucleophilic hotspots for ROS attack, while pyridine rings impeded degradation via steric hindrance. These findings highlight the UV/PS process as a scalable and pH–neutral technology for the effective removal of multiple pesticides, providing valuable insights for optimizing water treatment protocols in complex matrices.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107048"},"PeriodicalIF":6.9,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724670","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
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