Chemical Engineering Journal最新文献

{"title":"Impact of co-introduction of soluble potassium and nitrogen on methanotrophs","authors":"Xinyue Bai, Dandan Huang, Wanli Yang, Ke Huang, Ning Wang, Jiang Wu, Rujie Zhang, Qiyong Xu","doi":"10.1016/j.cej.2025.162171","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162171","url":null,"abstract":"Aerobic methane (CH₄) oxidation in paddy fields is a critical process for mitigating fugitive CH₄ emissions. Potassium (K) fertilizer is commonly used to increase crop yields and quality in paddy fields, often in combination with nitrogen (N) fertilizer. However, the impact of the significant input of K and N on methanotrophs is unclear. This study employed zeolite-adsorbed K and N to examine their influence on methanotrophic activity. Control groups with non-adsorbed (R) and experimental groups with K alone (K0), and combined with nitrate (NO₃^–-N) (K1) or ammonium (NH₄⁺-N) (K2) were established. Incubations were conducted over six cycles with a 15 % volume ratio of CH₄ and oxygen. Results showed that both K and NO₃^–-N enhanced the abundance of Type I methanotrophs, with K particularly increasing the abundance of <em>Methylomonas</em> and NO₃^–-N primarily promoting the growth of <em>Methylocaldum</em>. Metabolomic analysis indicates K inhibits the synthesis of bioactive and reductive phenols, ketones, sesquiterpenoids, and unsaturated fatty acids. This effect was suggesting that K more readily entering the periplasmic space to stimulate adenosine synthesis, thereby energizing the soluble methane monooxygenase (sMMO) enzyme unique to <em>Methylomonas</em>. N contributes to energy metabolism by integrating into nitrogenous precursors, supporting community vitality. This study provides insights into the adaptation of methanotrophs in ecological niche differentiation and the co-introduction of K and N fertilizer management strategies to alleviate CH₄ emissions","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"38 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metagenomics and metatranscriptomics uncover the regulatory mechanism of nitrogen metabolism response to aggregation status of anammox bacteria","authors":"Ru Wang, Jinshi Lian, Wenyan Wang, James P. Shapleigh, Longxing Jiang, Yahui Wang, Yan Huang, Ling Xie, Liangwei Deng, Wenguo Wang, Lan Wang","doi":"10.1016/j.cej.2025.162179","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162179","url":null,"abstract":"Auto-aggregation of anammox bacteria is known to enhance their activities and growth, yet the regulatory mechanism remains elusive. We address this issue using two anammox reactors: Nspd (with the aggregation inhibitor-norspermidine) and Aggre (control). After the 155 days of incubation, the mean diameter of the Nspd sludge (232.09 μm) was significantly lower than the Aggre sludge (510.56 μm), and the Nspd sludge exhibited lower extracellular protein content (1.10 mg/g-VSS) compared to Aggre (1.33 mg/g-VSS) but higher neutral exopolysaccharide content (23.97 vs. 17.37 mg/g-VSS). It means that norspermidine leads to disaggregation of anammox bacteria by breaking and altering EPS structure which further decreased ammonia removal efficiency (80.0 % and 98.3 % in Aggre and Nspd). The negative impact was also verified by physical grinding separation method of anammox granules. Metagenomic and metatranscriptomic analysis indicated that a <em>Candidatus</em> Brocadia strain, Bro-MAG_N75, dominated in both reactors and disaggregation induced a decrease of cAMP and quorum sensing (QS) signals levels as well as the increase of the c-di-GMP level. Then, this modulation of signal levels up-regulated the expression levels of exopolysaccharides and extracellular proteins (two fold), however down-regulated those of the principal nitrogen metabolic enzymes of Bro-MAG_N75 by approximately 50 %, namely hydrazine synthase and hydrazine oxidoreductase. Concurrently, there was an up-regulation of non-mainstream nitrogen metabolic pathways, like DNRA and potential denitrification, which enhance metabolic diversity. These findings reveal the mechanism of aggregation through QS signals and second messengers regulating nitrogen metabolic activity and finally enhancing the activities and growth rate of anammox bacteria","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"19 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing ZnTPP performance as a carbonic anhydrase mimic for promoting CO2 absorption via circumferential and axial functionalization","authors":"Yuchen Zhou, Feng Lin, Zezhi Chen, Huijuan Gong, Donglin Jiang, Huiqiang Yu, Lu Chen","doi":"10.1016/j.cej.2025.162169","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162169","url":null,"abstract":"Mitigating climate change requires efficient carbon dioxide (CO₂) capture technologies. Carbonic anhydrase (CA), the most efficient enzyme for CO₂ hydration, holds great potential for enhancing CO₂ absorption. However, its high cost and low stability limit large-scale applications. CA mimics present a promising alternative but often suffer from poor dispersibility in absorbents, restricting their catalytic performance. To this end, this study proposes a functional modification strategy to enhance CA mimics by introducing basic hydrophilic groups. Zinc tetraphenylporphyrin (ZnTPP) was selected as a representative CA mimic, and four derivatives were synthesized: peripherally modified ZnTPP with hydroxyl (ZnTPP-OH) and amino (ZnTPP-NH₂) groups, as well as axially coordinated ZnTPP with lysine (ZnTPP-Lysine) and diethylenetriamine (ZnTPP-C₄H₁₃N₃) complexes. Absorption experiments demonstrated that the modified mimics significantly improved CO₂ absorption in both water and a 20 wt% potassium carbonate (K₂CO₃) solution. ZnTPP-OH exhibited the highest efficiency, increasing CO₂ absorption by 38.10 % in water and 28.20 % in K₂CO₃ solution, achieving 2.71- and 1.69-fold enhancements compared to unmodified ZnTPP. Characterization and density functional theory (DFT) calculations confirmed that hydrophilic modification enhanced dispersibility and increased exposure of active sites. Additionally, basic hydrophilic groups provided extra CO₂ adsorption sites, facilitating nucleophilic attack step during the catalytic hydration process.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"60 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic whole genome amplification using digital microfluidics for single-cell sequencing","authors":"Qingyu Ruan, Changrui Shi, Xiaoye Lin, Weidong Ruan, Minghui Xu, Chaoyong Yang, Yukun Ren","doi":"10.1016/j.cej.2025.162099","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162099","url":null,"abstract":"Single-cell whole-genome sequencing (WGS) is primarily utilized to investigate the investigation of genetic alterations between individual cells, particularly focusing on copy number variations. Prior to single-cell WGS, genome amplification of single cells is indispensable, but poses challenges due to the limited amount of DNA and nonuniform amplification. Here, this work presented a digital microfluidic platform to execute automated single-cell WGA based on multiple annealing and looping-based amplification cycles (digital MALBAC). This platform enables us to perform one-step MALBAC by dynamic droplet shuttling between cold plate and heat plate, implementing the entire procedure from single-cell isolation to WGA. Our study demonstrated that digital MALBAC had low genomic amplification bias and high reproducibility, enabling accurate identification of copy number variations (CNVs). Leveraging digital microfluidics with precise temperature control, digital MALBAC offers a user-friendly, rapid, and highly reproducible solution that integrates seamlessly into workflows, positioning it as a promising strategy for biological applications.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"30 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High efficiency and short-process for preparing high-purity VOSO4 electrolyte","authors":"Changqing Li, Tao Jiang, Jing Wen, Guangdong Yang, Tangxia Yu, Lan Zhang, Xinyu An, Guowang Hao, Xinyu Liu","doi":"10.1016/j.cej.2025.162151","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162151","url":null,"abstract":"In response to the global explosive growth demand for all-vanadium redox flow batteries in the field of energy storage, the development of efficient, low-cost, and short processes for VOSO₄ electrolyte production is a critical challenge. Here, we present a novel process for the preparation of high-purity VOSO₄ electrolyte, utilizing calcified vanadium slag as the raw material, with H₂SO₄-C₆H₈O₆ synergistic reduction leaching combined with solvent extraction. The synergistic leaching system simultaneously achieves efficient vanadium extraction and the reduction of VO₂⁺ to VO²⁺. This effectively mitigates the long-standing hydrolysis challenge in the vanadium recovery process from vanadium slag via the calcification method. Under the conditions of leaching at pH 1.6, with a C₆H8O₆ dosage of 10 g/L, a leaching time of 30 min, and a leaching temperature of 60 °C, the vanadium leaching efficiency is 98.15 %. The leachate undergoes direct three-stage counter current extraction, where impurities are selectively separated from VO²⁺. Subsequently, more than 99.31 % of vanadium is recovered as high-purity VOSO₄ electrolyte through stripping, the quality of VOSO₄ far exceeds the Grade I standard specified in China. The total recovery efficiency of vanadium has reached 97.47 %, an increase of 7 to 10 percentage points compared to the existing VOSO₄ preparation process. This new process is poised to revolutionize the traditional preparation pathway of VOSO₄ by significantly increases resource utilization, simplifies processes, reduces costs, and mitigates potential environmental hazards.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"18 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Degradation of cefixime antibiotic by continuous flow ultraviolet-C persulfate based advanced oxidation process: Fresh and marine water matrices, antibacterial activity removal, and cost analysis","authors":"Atul Patel, Laxman G. Raikar, Jemi Gandhi, Halan Prakash","doi":"10.1016/j.cej.2025.162178","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162178","url":null,"abstract":"Antibiotic pollutants in wastewater from freshwater and marine water based aquaculture farming are a serious concern as they may cause emergence and spreading of antibiotic resistant bacteria (ARB) into environment. Here we show, degradation of cefixime (CFX), an antibiotic pollutant, in freshwater, marine aquaculture water (1:1 freshwater and seawater mixture), and seawater by continuous flow ultraviolet-C/persulphate (CF-UVC/PS) system, with pseudo-first-order rate constant (&lt;em&gt;k&lt;sub&gt;obs&lt;/sub&gt;&lt;/em&gt;) values of 0.5334 s&lt;sup&gt;−1&lt;/sup&gt;, 0.5080 s&lt;sup&gt;−1&lt;/sup&gt;, 0.4968 s&lt;sup&gt;−1&lt;/sup&gt; respectively. Degradation of CFX was attributed to oxidation by sulfate radical anion (&lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msubsup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi mathvariant=\"normal\" is=\"true\"&gt;S&lt;/mi&gt;&lt;mi mathvariant=\"normal\" is=\"true\"&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;&amp;#x2219;&lt;/mo&gt;&lt;mo is=\"true\"&gt;-&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"3.009ex\" role=\"img\" style=\"vertical-align: -0.812ex;\" viewbox=\"0 -945.9 2339.4 1295.7\" width=\"5.433ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMAIN-53\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(556,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-4F\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(1335,432)\"&gt;&lt;g is=\"true\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-2219\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(353,0)\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-2212\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(1335,-286)\"&gt;&lt;g is=\"true\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-34\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msubsup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\" mathvariant=\"normal\"&gt;S&lt;/mi&gt;&lt;mi is=\"true\" mathvariant=\"normal\"&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;∙&lt;/mo&gt;&lt;mo is=\"true\"&gt;-&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;msubsup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi mathvariant=\"normal\" is=\"true\"&gt;S&lt;/mi&gt;&lt;mi mathvariant=\"normal\" is=\"true\"&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;∙&lt;/mo&gt;&lt;mo is=\"true\"&gt;-&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt;) and hydroxyl radical (&lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi mathvariant=\"normal\" is=\"true\"&gt;H&lt;/mi&gt;&lt;mi mathvariant=\"normal\" is=\"true\"&gt;O&lt;/mi&gt;&lt;/mrow&gt;&l","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"41 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A highly selective copper-tin alloy nanosheet/carbon-paper sensitive electrode for detecting nitrite at low electrochemical reduction potential based on a binary cooperative strategy","authors":"Xing Zhao, Guangfeng Zhou, YiHao Geng, FeiYang Chen, HaoYu Zhu, Chun Zhao, Hui Suo, Lan Ding","doi":"10.1016/j.cej.2025.162199","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162199","url":null,"abstract":"Although the use of catalytic reduction low potential to detect NO₂^– can effectively solve the traditional problem of high working bias of electrochemical nitrite sensors, the reduction potential of NO₂^– is similar to that of other nitrogen-containing inorganic substances (NO₃^–), which leads to the inevitable interference of nitrate in the working process of the electrode, resulting in reduced electrode selectivity. In this study, the transition metal alloying method was used to solve this challenge, that is, based on the synergistic effect between the catalytic reduction characteristics of copper’s high-occupying D-orbital and the strong adsorption capacity of tin to oxygen. The copper-tin alloy nanosheet/carbon paper sensitive electrode (CuSn/CP) prepared by one-step electrodeposition was used for electrochemical detection of NO₂^–. The electrochemical test results show that the sensitive electrode has many excellent properties in nitrite detection: the detection potential is as low as −0.08 V vs.Hg/HgO, the sensitivity is as high as 4920µA·mM⁻¹ cm⁻¹, the detection limit is as low as 0.089 μM, and it shows strong anti-interference ability and good stability. Theoretical calculations further confirm that these excellent properties are due to the strong adsorption and electron transfer ability of copper-tin alloy for NO₂^–. The above results prove that the transition metal alloy sensitive electrode can detect nitrite efficiently and quickly to avoid NO₃^– interference, and at the same time, it has a low detection potential and strong stability, which provides a reference for the study of electrochemical nitrite low potential detection.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"3 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MDABCO-NH4l3 bridged between SnO2 and α-FAPbI3 for efficient and stable perovskite solar cells","authors":"Guangming Zhu, Sixiao Gu, Yibo Xu, Yaxin Li, Jiaxu Bai, Hongli Liu, Shirong Wang, Jun He, Xianggao Li","doi":"10.1016/j.cej.2025.162174","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162174","url":null,"abstract":"For perovskite solar cells (PSCs) based on the SnO₂ electron transport layer (ETL), the massive defects accumulated at the interface between the perovskite absorber layer and the SnO₂ ETL greatly limit the device efficiency and stability. Optimizing the SnO₂/perovskite interface can be a useful strategy to improve PSCs’ performance. Here, an all-organic perovskite (AOP), MDABCO-NH₄I₃, was employed to modify SnO₂ ETL for <em>α</em>-FAPbI₃ PSCs. MDABCO-NH₄I₃ could integrate ETL and perovskite layer together to form a favorable interface contact. Meanwhile, I⁻ and NH₄⁺ can covalently bond with <em>α</em>-FAPbI₃ to passivate the defects located in ETL/perovskite interface, reduce the recombination centers in the system, and finally obtain uniform perovskite films with low defect concentration. In addition, the presence of MDABCO²⁺ cation improves the energy level alignment at the perovskite/ETL interface by dipole movements, which also facilitates photogenerated carriers’ separation and transfer. The SnO₂-AOP ETL with reduced trap density and improved carrier transport boosted the open-circuit voltage of target PSC near to 1.18 V and achieved an inspiring PCE over 24 %. Related PSCs without encapsulation store at room temperature can maintain 80 % of their initial PCE over 3000 h. Moreover, the target PSCs could retain more than 90 % and 85 % of their initial efficiency after 600 h of heat testing (65 60 ± 5 °C in Ar) and humidity testing (60 ∼ 65 % RH in air), respectively.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"1 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the influence of intake structure on Local-Scrubber combustion process","authors":"Guipeng Wang, Xiangning Yu, Guangyu Wang, Xiangling Kong, Zhe Li, Yuanhua Xie, Kun Liu","doi":"10.1016/j.cej.2025.162126","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162126","url":null,"abstract":"This paper addresses critical challenges in exhaust gas treatment for semiconductor processes by designing and constructing an efficient exhaust gas treatment system. An experimental platform was developed to conduct temperature tests within the combustion system, revealing the temperature distribution characteristics inside the cavity. Utilizing the experimental data, a numerical simulation methodology was established to optimize system performance. To evaluate the performance, the flow field distribution, flame shape, temperature distribution, and gas residence time in the combustion chamber were compared across three intake configurations: two pipes, three pipes, and a ring pipe. The results indicate that the flame shape produced by the annular intake structure outperforms that of the other configurations. Specifically, the effective treatment area of the three-pipe intake structure increases by approximately 8.5% compared to the two-pipe structure. In comparison, the ring intake structure further enhances the effective treatment area by about 1.9% over the three-pipe setup. In conclusion, the combined advantages of the three-pipe and ring pipe intake model are significant, providing a robust foundation for future system design and optimization. This approach helps reduce environmental pollution from semiconductor processes and advances the green development of the semiconductor manufacturing industry.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"33 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphology-tunable anhydrous MgCO3 synthesis from magnesite solid waste via salicylic acid-Na2EDTA synergistic leaching and carbonation","authors":"Jiayi Liu, Yulian Wang, Wanzhong Yin, Haoran Sun, Bin Yang, Jin Yao","doi":"10.1016/j.cej.2025.162168","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162168","url":null,"abstract":"Magnesite solid waste (MSW) is typically discarded during magnesite mining, leading to significant resource waste and environmental pollution. This study introduces a synergistic salicylic acid (SA)-Na₂EDTA system for efficient Mg²⁺ leaching from MSW and subsequent synthesis of high-purity anhydrous MgCO₃ (MC). The effects of reagent type, concentration, and leaching/carbonation temperature on Mg²⁺ leaching and carbonation behaviors were investigated. Under optimized leaching conditions (0.55 M reagent concentration, 70 °C), SA achieved a Mg²⁺ leaching efficiency of 97.08 %, comparable to the 98.24 % efficiency obtained with H₂SO₄, demonstrating the feasibility of substituting strong acids with weak acids for Mg²⁺ extraction. The Mg²⁺ leaching efficiency was further enhanced to 99.64 % by introducing Na₂EDTA. SA degradation provided a carbon source during carbonation, while Na₂EDTA acted as a crystal control agent. Under carbonation conditions of 150 °C for 12 h, MC morphology transitioned from rod-like to flower-like spherical with increasing Na₂EDTA addition, achieving a high purity of 99.1 %. The mechanism of synergistic leaching and morphology modulation was analyzed by characterization techniques and DFT calculations. The results indicate that H-O bond formation between SA and magnesite induced O-Mg bond cleavage, releasing Mg²⁺, which EDTA^2- subsequently chelated to promote leaching. As carbonation proceeds, EDTA^2- adsorbed onto the MC surface through chemisorption, mediating oriented growth and assembly to regulate its morphology. This work presents a streamlined process for controllable synthesis of high-purity MC with multiple morphologies, offering a sustainable strategy for MSW resource recovery and environmental remediation.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"38 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}