Daoqing Liu , Qing Wang , Biao Wei , Shaoxia Yang , Qianwei Li , Huazhang Zhao
{"title":"Simultaneous removal of phosphate and hydroquinone using Fe3Ce1Ox(CA)/H2O2 Fenton-like system","authors":"Daoqing Liu , Qing Wang , Biao Wei , Shaoxia Yang , Qianwei Li , Huazhang Zhao","doi":"10.1016/j.psep.2025.107322","DOIUrl":"10.1016/j.psep.2025.107322","url":null,"abstract":"<div><div>Phosphates and organic matter usually coexist in secondary effluent, adversely affecting the stable control of water quality. Therefore, achieving the simultaneous removal of phosphates and organic matter from water bodies is significant. This study reports an excellent Fe₃Ce₁Oₓ(CA) functional material synthesized via a simple one-step co-precipitation method for hydroquinone (HQ) degradation through a Fenton-like reaction while simultaneously adsorbing phosphate. Experimental results show that the Fe₃Ce₁Oₓ(CA) materials exhibit a 92 % HQ degradation efficiency and an 80 % phosphate adsorption efficiency. Systematic characterization confirms that the Fe–Ce synergistic effect enhances the Fe(II) content, significantly promoting H₂O₂ activation. Electron paramagnetic resonance and radical scavenger experiments reveal that ¹O₂, O₂<sup>•</sup>⁻, and •OH play essential roles in organic degradation, with •OH being the dominant reactive species. Introducing citric acid increases the Ce(III) content in the Fe–Ce bimetallic oxide composite, enhancing its phosphate adsorption performance. This material successfully achieves both HQ degradation and phosphate removal, and these findings suggest that the Fe₃Ce₁Oₓ(CA)/H₂O₂ system can potentially treat wastewater with combined organic and phosphate pollution. This approach, which achieves multifunctionality in water treatment by regulating the composition of environmental functional materials, enhances the practical application potential of such materials.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"199 ","pages":"Article 107322"},"PeriodicalIF":6.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070643","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}
Wenbo Li , Maoyuan Wang , Shuo Wang , Yuexin Han , Zhidong Tang , Yahui Zhang
{"title":"Mechanism study and thermodynamic analysis of iron recovery from Sulfuric acid slag by suspension magnetization roasting and magnetic separation","authors":"Wenbo Li , Maoyuan Wang , Shuo Wang , Yuexin Han , Zhidong Tang , Yahui Zhang","doi":"10.1016/j.psep.2025.107321","DOIUrl":"10.1016/j.psep.2025.107321","url":null,"abstract":"<div><div>Sulfuric acid slag, a byproduct derived from the oxidation roasting of pyrite in sulfuric acid production, constitutes a promising secondary iron resource with substantial recycling potential and wide-ranging industrial applications. However, inadequate recycling of this slag may lead to significant environmental degradation and pose serious risks to human health. In this study, an innovative suspended magnetization roasting-magnetic separation (SR-MS) process is proposed for the efficient recovery of iron from sulfuric acid slag. The iron phase transformation behavior of the slag in the reduction/magnetization process was systematically investigated through thermodynamic analysis. Key process parameters were optimized to achieve enhanced iron recovery efficiency, yielding optimal experimental conditions and high-quality iron-rich products. When the calcination temperature was 525 °C, the reducing agent concentration was 30 % (CO:H<sub>2</sub>=1:3), the roasting time was 20 min, and the magnetic separator field intensity was 1200 Oe, the concentrate iron grade was 63.24 % and the iron recovery rate was 92.20 %. Under a calcination condition of 525 °C, with reducing agent dosage maintained at 30 % (CO:H<sub>2</sub>=1:3) and roasting duration fixed at 20 min, magnetic separation conducted under 1200 Oe field strength yielded concentrate with 63.24 % Fe content alongside 92.20 % metal recovery. The mechanism was studied by chemical multi-element analysis, phase analysis, VSM analysis and SEM analysis of the slag samples in each stage of the suspension magnetization roasting-magnetic separation (SR-MS) process. It was found that through suspension magnetization roasting (SMR) pretreatment, hematite almost transformed into magnetite with greater magnetism, and microscopic morphology observation revealed significant changes on its mineral surface. The Suspension Magnetization Roasting (SMR) technique not only modifies the physicochemical surface properties of materials, but more significantly induces microstructural reorganization through crack propagation and pore evolution mechanisms. This structural transformation substantially enhances pore distribution characteristics, manifesting as measurable expansion in specific surface area and stepwise increase in total pore volume. The demonstrated that the raw slag is transformed into magnetite. The phase transition from hematite to magnetite during roasting was confirmed through FT-IR spectroscopic analysis. These findings provide critical insights for advancing research and development in sustainable iron resource recycling and innovative solid waste disposal technologies.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"199 ","pages":"Article 107321"},"PeriodicalIF":6.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070645","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}
Abdelmoutaleb Noumeur , Mohamad Syazarudin Md Said , Mohd Rafee Baharudin , Hamdan Mohamed Yusoff , Mohd Zahirasri Mohd Tohir
{"title":"Predicting spatial sound attenuation in buildings with machine learning: Implications for fire alarm placement","authors":"Abdelmoutaleb Noumeur , Mohamad Syazarudin Md Said , Mohd Rafee Baharudin , Hamdan Mohamed Yusoff , Mohd Zahirasri Mohd Tohir","doi":"10.1016/j.psep.2025.107314","DOIUrl":"10.1016/j.psep.2025.107314","url":null,"abstract":"<div><div>Audible and intelligible fire alarms play a critical role in ensuring occupant safety in emergencies. Although various experimental and theoretical methods exist to measure and predict alarm sound levels, the variability and limitations of these methods, especially in complex layouts, remain underexplored. Building on both established fire engineering research and advanced alarm management concepts from process safety, this study evaluates the effectiveness of fire alarm placement within residential units by comparing in situ measurements, calculation-based estimates, and machine learning predictions. The findings show that open doors result in higher sound levels than closed doors, and corridor-based alarms typically fail to meet the recommended 75 dBA threshold needed to awaken sleeping occupants. Moreover, established calculation methods show an average error rate of about 9 %, especially in geometrically complex or acoustically variable settings. By contrast, the machine learning model achieves a notably lower error rate at around 2 % underscoring its potential to integrate uncertainty factors such as distance, partitions, and acoustic attenuation more effectively than traditional formulas. From a risk management perspective, these results highlight the value of data-driven, risk-based alarm design, aligning with hybrid alarm modeling approaches seen in process industries. The study concludes that installing fire alarms within each dwelling unit, coupled with interconnected sounders in sleeping areas, significantly enhances occupant alertness and system reliability in residential buildings.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"199 ","pages":"Article 107314"},"PeriodicalIF":6.9,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mg²⁺- Modified geopolymer induced struvite crystallization for nitrogen and phosphorus co-recovery and its synergistic lead immobilization","authors":"Tian Wang, Panyang He, Xiaomin Zhang, Tianxing Chen","doi":"10.1016/j.psep.2025.107305","DOIUrl":"10.1016/j.psep.2025.107305","url":null,"abstract":"<div><div>Nitrogen and phosphorus pollution-induced eutrophication and soil heavy metal contamination are two critical global environmental challenges. Struvite precipitation can not only simultaneously removes ammonia nitrogen (NH<sub>4</sub><sup>+</sup>-N) and phosphate (PO<sub>4</sub><sup>3-</sup>-P) from water but also generates struvite for heavy metal immobilization. However, the small crystalline particles generated causes the difficult collection of struvite. In this study, a MgCl<sub>2</sub> modified metakaolin-based porous geopolymers (Mg<sup>2+</sup>-MKG) were prepared via a simple impregnation method and used as both magnesium source and crystal seed to induce the crystallization of struvite. The effects of MgCl<sub>2</sub> content, adsorbent dosage, pH, nitrogen/phosphorus (N/P) ratio, and initial NH<sub>4</sub><sup>+</sup>-N/PO<sub>4</sub><sup>3-</sup>-P concentrations on adsorption capacity were systematically evaluated. The maximum adsorption capacities of 105.91 mg·g<sup>−1</sup> (7.565 mmol·g<sup>−1</sup>) for NH<sub>4</sub><sup>+</sup>-N and 168.05 mg·g<sup>−1</sup> (5.421 mmol·g<sup>−1</sup>) for PO<sub>4</sub><sup>3-</sup>-P were achieved under the optimal conditions: 0.4 g·L<sup>−1</sup> 20Mg<sup>2+</sup>-MKG dosage, pH= 8, N/P molar ratio 2.2:1, and initial NH<sub>4</sub><sup>+</sup>-N/PO<sub>4</sub><sup>3-</sup>-P concentrations of 100 mg·L<sup>−1</sup>. Kinetic and isothermal adsorption data for NH<sub>4</sub><sup>+</sup>-N and PO<sub>4</sub><sup>3-</sup>-P were well described by the pseudo-second-order and Langmuir models, respectively, indicating that this adsorption process was chemisorptive and spontaneous characteristics with exothermic behavior. NH<sub>4</sub><sup>+</sup>-N adsorption mechanisms included physical adsorption, cation exchange between NH<sub>4</sub><sup>+</sup> and Mg<sup>2+</sup>, electrostatic interactions, and struvite formation, while PO<sub>4</sub><sup>3-</sup>-P removal occurred predominantly via struvite precipitation. Additionally, the geopolymer/struvite composite generated as a byproduct during NH<sub>4</sub><sup>+</sup>-N and PO<sub>4</sub><sup>3-</sup>-P co-adsorption process exhibited superior Pb immobilization performance in contaminated soils.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"199 ","pages":"Article 107305"},"PeriodicalIF":6.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070641","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}
Shaifulazri Zainulabidin , Zulkifli Abdul Rashid , Mohd Aizad Ahmad , Luqman Hakimi Mohd Zamri
{"title":"Chlorine-related from two (2) incidents in water treatment plant: A comprehensive review on root cause analysis","authors":"Shaifulazri Zainulabidin , Zulkifli Abdul Rashid , Mohd Aizad Ahmad , Luqman Hakimi Mohd Zamri","doi":"10.1016/j.psep.2025.107286","DOIUrl":"10.1016/j.psep.2025.107286","url":null,"abstract":"<div><div>Process industry accidents threaten people, the environment, and property, particularly when they use dangerous chemicals like chlorine. This study examines chlorine-related occurrences in water treatment facilities (WTPs), which frequently use chlorine gas for disinfection. Water treatment plants often maintain more than 20 drums of chlorine, with each drum bringing around 930 kg. This surplus amplifies intrinsic hazards owing to chlorine's reactivity and severe health repercussions upon exposure. Incidents such as the 2022 event in Bhopal, which resulted in the hospitalization of 15 individuals, and the 2017 occurrence in Kota Belud highlight the need for safe operational practices. This study investigates several chlorine-related incidents to determine common root causes and evaluate their consequences. The study examines root causes and preventive measures through the development of Fault Tree Analysis (FTA) and Event Tree Analysis (ETA). The research shows that effective ways to stop chlorine accidents, like working leak detectors, scrubber systems, and emergency shutdown valves (ESVs), are crucial. Should the ESVs malfunction, immediate intervention by a trained person, along with operational leak detectors and scrubber systems, can ensure the safety of the WTPs.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"199 ","pages":"Article 107286"},"PeriodicalIF":6.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084035","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}
Xin Zhang , Yun Zhang , Zhanggui Xu , Xinfeng Li , Sen Xu , Xingliang Wu , Zhuanghong Zhou , Yongan Feng , Fengyuan Jiao , Weiguo Cao
{"title":"Investigation into the thermal stability and decomposition processes in AlH3 and stearic acid-coated AlH3","authors":"Xin Zhang , Yun Zhang , Zhanggui Xu , Xinfeng Li , Sen Xu , Xingliang Wu , Zhuanghong Zhou , Yongan Feng , Fengyuan Jiao , Weiguo Cao","doi":"10.1016/j.psep.2025.107312","DOIUrl":"10.1016/j.psep.2025.107312","url":null,"abstract":"<div><div>Aluminium hydride (AlH<sub>3</sub>), a promising metal-based hydrogen storage material, faces problems related to its relatively poor stability. In the paper, the thermal stability of stearic acid-coated AlH<sub>3</sub> (SA/AlH<sub>3</sub>) and AlH<sub>3</sub> was compared by thermogravimetric analysis and minimum ignition temperature test, including pyrolysis and ignition stability. The decomposition temperature and apparent activation energy of SA/AlH<sub>3</sub> were higher than those of AlH<sub>3</sub>, indicating that the decomposition was more difficult. During pyrolysis, SA/AlH<sub>3</sub> demonstrated a higher minimum ignition temperature and a slower rate of potential energy decline, which indicated that the coating of SA had improved the thermal stability of AlH<sub>3</sub>. Reactive force field molecular dynamics simulation revealed the difference in pyrolysis behavior between AlH<sub>3</sub> and SA/AlH<sub>3</sub>. Small molecular products such as H<sub>2</sub>, H<sub>2</sub>O, CH<sub>4</sub>, C<sub>2</sub>H<sub>4</sub>, CO, and CO<sub>2</sub> were generated, further generating clusters dominated by C-Al bonds. Improving the thermal stability of SA/AlH<sub>3</sub> coating is an important reference for the application of AlH<sub>3</sub> in energetic materials.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"199 ","pages":"Article 107312"},"PeriodicalIF":6.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070647","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}
Xiaolong Zhao , Zhiwu Wang , Yang Zhang , Zixu Zhang , Jingtao Xiao
{"title":"Reactive molecular dynamics study of pyrolysis mechanism of aviation kerosene (RP-3)/ethanol blended fuel","authors":"Xiaolong Zhao , Zhiwu Wang , Yang Zhang , Zixu Zhang , Jingtao Xiao","doi":"10.1016/j.psep.2025.107302","DOIUrl":"10.1016/j.psep.2025.107302","url":null,"abstract":"<div><div>Promoting clean and efficient combustion of aviation fuel is a key direction for the future development of aviation engine technology. Blending ethanol into aviation kerosene is an important strategy to enhance fuel combustion efficiency, reduce pollutant emissions, and mitigate energy consumption. This study employed the reactive force field molecular dynamics (ReaxFF MD) method to simulate and analyze the effects of different ethanol blending ratios on the pyrolysis process of RP-3. By analyzing the initial decomposition pathways of RP-3, the evolution and distribution of pyrolysis products, and the activation energy, the role of ethanol in the decomposition of RP-3 fuel was elucidated. The results show that ethanol with a low blending ratio has a certain promoting effect on the decomposition of RP-3, and this effect is restricted by the change in temperature. Moreover, ethanol can affect the initial decomposition pathway of RP-3. The OH and CH<sub>3</sub>O radicals generated by ethanol interact with the components of RP-3, which is beneficial for improving the pyrolysis chain reaction of RP-3. The pyrolysis kinetics analysis indicates that the addition of 7 wt% and 49 wt% ethanol reduces the activation energy of RP-3, whereas the addition of other ethanol ratios increases its activation energy. This study provides a new perspective to understand the pyrolysis process of RP-3/ethanol blends and lays the foundation for the development and application of clean and efficient aviation fuels.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"199 ","pages":"Article 107302"},"PeriodicalIF":6.9,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084033","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}
Zhengwei Han , Yu Xie , Yinbo Song , Hui Zhong , Zhiguo He
{"title":"Mechanism of enhanced rubidium extraction from biotite via magnesium nitrate-assisted acid leaching: Experimental and DFT theoretical insights","authors":"Zhengwei Han , Yu Xie , Yinbo Song , Hui Zhong , Zhiguo He","doi":"10.1016/j.psep.2025.107301","DOIUrl":"10.1016/j.psep.2025.107301","url":null,"abstract":"<div><div>This study explored the mechanism and optimization of technical condition for enhanced rubidium extraction by utilizing magnesium nitrate in the sulfuric acid leaching process of biotite. The extraction efficiency of rubidium was significantly improved with the addition of magnesium nitrate. Under optimized conditions, the Rb leaching efficiency achieved 95.9 %. Concurrently, the leaching efficiency of impurity ions such as iron and aluminum were effectively reduced. Compared with the sulfuric acid leaching process, the iron leaching efficiency decreased from 90.3 % to 67.9 %, and the aluminum leaching efficiency decreased from 64.8 % to 17.0 % in enhanced process. The crystal structure transformation of biotite was systematically investigated using SEM-EDS, XRD, FTIR, FIR, and Mossbauer techniques. These analyses revealed significant modifications in the interlayer spacing, tetrahedral coordination, and octahedral structure. The DFT calculations have confirmed that the ion exchange process involves the participation of Mg<sup>2 +</sup> and H<sup>+</sup>, which play a critical role in facilitating the rubidium extraction. This interaction resulting in an increase in the (001) interplanar crystal spacing of biotite from 0.993 nm to 1.00 nm. The results demonstrated that magnesium nitrate functions as an exceptional enhancer for the acid leaching of rubidium from biotite. This process provides a novel strategy for the development of more efficient and environmentally sustainable processes for the recovery of valuable metals from micas.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"199 ","pages":"Article 107301"},"PeriodicalIF":6.9,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069933","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}
Hongxia Wang , Xiaoli Li , Peinan Guo , Zaoxiao Zhang , Lei Shi
{"title":"Optimization and renovation of energy complementary intra-plant/inter-plant integrated heat exchanger networks for waste heat recovery in the calcium carbide industry","authors":"Hongxia Wang , Xiaoli Li , Peinan Guo , Zaoxiao Zhang , Lei Shi","doi":"10.1016/j.psep.2025.107306","DOIUrl":"10.1016/j.psep.2025.107306","url":null,"abstract":"<div><div>The calcium carbide industry, characterized by its energy and emissions intensity, faces pressing sustainability demands in the “double-carbon” era. This study identifies substantial energy-saving opportunities within heat exchange networks. An optimization method is proposed that combines intra-/inter-plant heat integration to retrofit carbide plant heat exchange networks for energy efficiency. This approach is primarily based on pinch technology, where the heat exchange was first reconstructed within subsystems to minimize utility consumption. Results indicate that the intra-plant heat integration yields energy savings of 31.49 % for subsystem 1 and 28.79 % for subsystem 2. Subsequently, excess heat and cooling loads from the optimized subsystems were extracted as new heat exchange streams, facilitating heat exchange matching between subsystems. Thus, excess heat from subsystem 1 serves as heat source, while the excess cold from subsystem 2 acts as heat sink in inter-plant integration, creating a synergistic energy-saving mechanism to achieve inter-plant heat integration. The total energy from inter-plant heat integration reaches 10.83 MW, contributing to an overall heat recovery potential of 38.55 MW, ultimately achieving a remarkable total energy saving rate while minimizing the heat exchange units in this case. This research underscores the importance of multi-energy complementarity in advancing energy efficiency for future carbide industry.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"199 ","pages":"Article 107306"},"PeriodicalIF":6.9,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948194","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}
Meile Chu , Bingjie Huo , Weijun Tian , Mengyuan Zou
{"title":"Investigating the electrosorption selectivity of mesoporous carbon electrodes for sulfate from mining wastewater in membrane capacitive deionization","authors":"Meile Chu , Bingjie Huo , Weijun Tian , Mengyuan Zou","doi":"10.1016/j.psep.2025.107297","DOIUrl":"10.1016/j.psep.2025.107297","url":null,"abstract":"<div><div>Sulfate contamination is a common problem in mining wastewater. We evaluated the selectivity of a dual-activated mesoporous carbon (DPC) electrode for sulfate in simulated solutions and actual mining wastewater due to the complex composition of actual mining wastewater. Our findings showed that the normalized equivalent electrosorption capacity of membrane capacitive deionization (MCDI) in equimolar ternary solution exhibited the following order: SO<sub>4</sub><sup>2-</sup> (0.42 mmol/g) > NO<sub>3</sub><sup>-</sup> (0.31 mmol<sup>/</sup>g) > Cl<sup>-</sup> (0.03 mmol/g), which was related to the DCP and ionic properties. Density-functional theory (DFT) calculations indicated that the superior selectivity of the DPC electrode for SO<sub>4</sub><sup>2-</sup> was also associated with the higher binding energies between the oxidized functional groups and SO<sub>4</sub><sup>2-</sup>. DPC-based MCDI effectively removed high concentrations of sulfate and common heavy metals from actual mining wastewater. Moreover, it exhibited excellent selectivity towards SO<sub>4</sub><sup>2-</sup>, demonstrating the feasibility of DPC electrode-based MCDI for treatment of real mining wastewater.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"199 ","pages":"Article 107297"},"PeriodicalIF":6.9,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943101","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}