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Multi-subspace quality-aware slow feature extraction for decentralized process monitoring
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-21 DOI: 10.1016/j.psep.2025.107009
Yuanhui Ni , Chao Jiang
{"title":"Multi-subspace quality-aware slow feature extraction for decentralized process monitoring","authors":"Yuanhui Ni ,&nbsp;Chao Jiang","doi":"10.1016/j.psep.2025.107009","DOIUrl":"10.1016/j.psep.2025.107009","url":null,"abstract":"<div><div>The focus on process safety and product quality has propelled the adoption of sophisticated data-driven methodologies, with multivariate statistical process monitoring (MSPM) becoming a cornerstone in process industries. However, as these industries expand and generate increasingly complex datasets, conventional MSPM frameworks often fail to capture intricate process dynamics, complicating fault detection and diagnosis. Additionally, most MSPM approaches do not consider the moderating influence of closed-loop controllers on abnormal conditions, frequently leading to misclassification of operational transitions as faults. To address these challenges, this paper presents a Multi-Subspace Quality-Aware Slow Feature Analysis (MQASFA) method for concurrently monitoring operational deviations and anomalous behavior. The MQASFA framework employs a multi-subspace strategy using symmetric Kullback-Leibler divergence to aggregate correlated variables from a probabilistic standpoint. A divisive hierarchical clustering algorithm is applied to integrate variable blocks, reducing computational complexity and redundancy while preserving essential local process information. A quality-aware slow feature analysis submodel is subsequently deployed for decentralized, quality-focused monitoring within each subspace. To differentiate routine operational variations from significant anomalies, novel static and dynamic metrics derived from Support Vector Data Description are introduced. The efficacy of the proposed methodology is validated through applications to the Tennessee Eastman process and a wastewater treatment benchmark.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107009"},"PeriodicalIF":6.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724305","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 of a novel eco-friendly depressant for the selective flotation of magnesite from dolomite: Investigation of Luteolin’s effectiveness and mechanism of action
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-21 DOI: 10.1016/j.psep.2025.107046
Xiaoqi Ban , Jin Yao , Wanzhong Yin , Weifan Du , Taozhong Zhang , Yu Xie , Wenju Sun , Yulian Wang
{"title":"Development of a novel eco-friendly depressant for the selective flotation of magnesite from dolomite: Investigation of Luteolin’s effectiveness and mechanism of action","authors":"Xiaoqi Ban ,&nbsp;Jin Yao ,&nbsp;Wanzhong Yin ,&nbsp;Weifan Du ,&nbsp;Taozhong Zhang ,&nbsp;Yu Xie ,&nbsp;Wenju Sun ,&nbsp;Yulian Wang","doi":"10.1016/j.psep.2025.107046","DOIUrl":"10.1016/j.psep.2025.107046","url":null,"abstract":"<div><div>Magnesite and dolomite exhibit similar crystal structures, chemical compositions, and surface properties, which pose significant challenges to their flotation separation. In response to the growing need for efficient and environmentally sustainable decalcification of magnesite, this study introduces luteolin (LUT), a novel eco-friendly depressant. The selective depression efficiency of LUT on dolomite within the magnesite flotation system was systematically assessed. Optimal flotation conditions (pH 11.0, LUT concentration of 60 mg/L, and NaOl concentration of 120 mg/L) resulted in a concentrate with 43.05 % MgO and 4.98 % CaO, effectively achieving the separation of magnesite from dolomite. The depression mechanism of LUT was thoroughly investigated through a combination of zeta potential, contact angle, FTIR, XPS, and AFM analyses. The results indicate that LUT’s hydroxyl groups preferentially adsorb onto the calcium sites of dolomite, preventing subsequent adsorption of sodium oleate, while exhibiting minimal interaction with magnesium sites on magnesite, thus preserving its flotation behavior. This study offers a promising, environmentally friendly solution for the selective separation of magnesite from dolomite.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107046"},"PeriodicalIF":6.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687955","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
Exploration of silica fume effect on solid waste based backfilling material: Mechanical properties, hydration mechanism and economic benefits
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-20 DOI: 10.1016/j.psep.2025.107042
Xiang Zhang , Sitao Zhu , Yijie Wang , Jiajie Li , Keqing Li , Chengguo Zhang
{"title":"Exploration of silica fume effect on solid waste based backfilling material: Mechanical properties, hydration mechanism and economic benefits","authors":"Xiang Zhang ,&nbsp;Sitao Zhu ,&nbsp;Yijie Wang ,&nbsp;Jiajie Li ,&nbsp;Keqing Li ,&nbsp;Chengguo Zhang","doi":"10.1016/j.psep.2025.107042","DOIUrl":"10.1016/j.psep.2025.107042","url":null,"abstract":"<div><div>The resource utilization of solid wastes such as silica fume (SF), ground-granulated blast furnace slag (GGBFS), and steel slag (SS) has become a current research hotspot. This study aims to investigate the effect of SF content on the performance and hydration mechanisms of GGBFS-SS-based cementitious filling materials. A low-cost SF-GGBFS-SS-FGD gypsum-based cementitious filling material (SGM) is proposed for the first time, and its compressive strength, fluidity, setting time, shrinkage, electrical conductivity, and leaching safety are evaluated. The results show that when the SF content is 16 %, the SGM exhibits the highest compressive strength at 7 days and 28 days, reaching 1.72 MPa and 3.44 MPa, respectively. The addition of an appropriate amount of SF (10 %) improves the fluidity of SGM (221 cm). Moreover, when the SF content is 16 %, SGM shows the lowest shrinkage rates (3.56 %/4.87 %) and electrical conductivity (6.25 Ω·m/8.78 Ω·m) at 7 days and 28 days. The hydration mechanism is as follows: The incorporation of an appropriate amount of fine-grade SF leads to nucleation crystallization, which provides more active nucleation sites for hydration reactions, increasing the generation and crystallization polymerization degree of hydration products such as C-S-H gel and ettringite. This is reflected in the increased relative number of bridging oxygen (RBO = 22.79 %) in C-S-H gel and the Al[Ⅵ] content in ettringite. The economic analysis results show that, compared to traditional cement binders, the ton production cost of SGM with 16 % SF content is further reduced by 29.59 %. This study provides new insights into the development of low-cost SGM and is of significant importance for the resource utilization of solid wastes such as SF and the application of filling materials.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107042"},"PeriodicalIF":6.9,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684714","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
Decoding constructed wetlands: A meta-analysis of performance and key drivers in tail water treatment
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-20 DOI: 10.1016/j.psep.2025.107040
Weiwei Lu , Fei Zhong , Juan Wu , Hongyun Ma , Lingwei Kong , Lingling Zhang , Ying Wang , Chao Xu , Yang Zhang , Yang Yang , Yaqian Zhao , Shuiping Cheng
{"title":"Decoding constructed wetlands: A meta-analysis of performance and key drivers in tail water treatment","authors":"Weiwei Lu ,&nbsp;Fei Zhong ,&nbsp;Juan Wu ,&nbsp;Hongyun Ma ,&nbsp;Lingwei Kong ,&nbsp;Lingling Zhang ,&nbsp;Ying Wang ,&nbsp;Chao Xu ,&nbsp;Yang Zhang ,&nbsp;Yang Yang ,&nbsp;Yaqian Zhao ,&nbsp;Shuiping Cheng","doi":"10.1016/j.psep.2025.107040","DOIUrl":"10.1016/j.psep.2025.107040","url":null,"abstract":"<div><div>Given the escalating water pollution crisis and the urgent need for sustainable wastewater management, the recycling of tail water from wastewater treatment plants is receiving increasing global attention due to its substantial volume. In this regard, constructed wetlands (CWs) have emerged as a promising solution; however, gaps remain due to the lack of systematic quantitative analysis on their outcomes and determinants. To address this, we conducted a meta-analysis of 141 global studies to evaluate CW performance. Our findings revealed an overall polishing efficiency of 58.0 %. Alarmingly, nitrogen and phosphorus effluent concentrations in many cases exceeded desired standards in China, at 52.8 % and 27.0 %, respectively. From our analysis, three key conclusions were drawn: (1) vertical subsurface flow CWs exhibited the best purification performance, (2) the hydraulic loading rate should be maintained below 1.03 m/d to exceed the current average nitrogen removal efficiency, and (3) CWs planted with emergent macrophytes demonstrated superior overall removal efficacy. These insights offer valuable guidance for optimizing CW design and operation in relation to tail water polishing, ultimately contributing to environmental protection and the sustainable management of water resources.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107040"},"PeriodicalIF":6.9,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684715","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
Study on the adsorption of common antibiotics in water by cellulose-based adsorbents derived from sugarcane bagasse
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-19 DOI: 10.1016/j.psep.2025.107036
Jiarong Jin , Xuliang Lin , Chak Yin Tang , Wing Cheung Law , Ruchun Wu , Lei Zhong
{"title":"Study on the adsorption of common antibiotics in water by cellulose-based adsorbents derived from sugarcane bagasse","authors":"Jiarong Jin ,&nbsp;Xuliang Lin ,&nbsp;Chak Yin Tang ,&nbsp;Wing Cheung Law ,&nbsp;Ruchun Wu ,&nbsp;Lei Zhong","doi":"10.1016/j.psep.2025.107036","DOIUrl":"10.1016/j.psep.2025.107036","url":null,"abstract":"<div><div>Potassium acetate-modified cellulose biochar (PCB) derived from bagasse cellulose was utilized as an adsorbent. The adsorption performance and mechanism of PCB were evaluated using a typical mixture of antibiotics in simulated river water, including sulfamethoxazole (SMX), sulfadiazine (SMT), ofloxacin (OFL), ciprofloxacin (CIP), chloramphenicol (CAP), and florfenicol (FF). The PCB had a high specific surface area of 1693.22 m<sup>2</sup>/g. At 298 K, the maximum adsorption capacities of PCB for OFL, CIP, CAP, SMT, SMX, and FF were 158.492, 131.068, 76.391, 62.701, 38.802, and 33.417 mg/g, respectively. The adsorption of the six mixed antibiotics by PCB conforms to the pseudo-second-order kinetics and the Langmuir model. Competitive adsorption occurred among the mixed antibiotics, with OFL and CIP occupying the adsorption sites. The effect of pH on the adsorption capacity is significant. The adsorption mechanisms of typical antibiotics were investigated by integrating quantum chemical theoretical calculations. The contributions of electrostatic interactions, hydrogen bonding, and π-π interactions to the adsorption performance were quantitatively analyzed.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107036"},"PeriodicalIF":6.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675596","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
PM2.5 separation efficiency and energy assessment for cleanable dust- and oil-water soluble mist filter media
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-19 DOI: 10.1016/j.psep.2025.106950
Wilhelm Hoeflinger
{"title":"PM2.5 separation efficiency and energy assessment for cleanable dust- and oil-water soluble mist filter media","authors":"Wilhelm Hoeflinger","doi":"10.1016/j.psep.2025.106950","DOIUrl":"10.1016/j.psep.2025.106950","url":null,"abstract":"<div><div>In connection with rising energy prices have brought the energy consumption of air filters and their ability to separate fine PM2.5 particles into focus. For high particle concentrations, cleanable filters are in use, like cleanable dust filters and cooling lubricant oil-water mist filters. These two filter systems have similarities due to their rapid filter media clogging. The most expensive part of the cleanable filter is the filter medium itself. Latter will be tested by using corresponding test standards. For assessing these test results, the well-known quality factor QF is proposed. This includes the PM2.5 separation efficiency and the pressure drop with its unit [Pa]. As the SI unit [Pa] can be set equal to the SI unit [J/m<sup>3</sup>], the pressure drop term can be replaced by a so-called equivalent pressure drop, in which the filtration pressure can be added together with all other used energy parts. For the case of cleanable dust filter, the cleaning energy could be then included in the quality factor calculation. Filter test series executed on the VDI3926, ISO110572011 standard and quality factor evaluation without and with including the cleaning energy showed that the latter plays an essential role for filter media assessment. Other tests, using the quality factor evaluation showed, that different filter media assessments occur when the separation of PM2.5 or PM10 particles is the separation goal. In case of qualifying cooling liquid mist filters, the droplets to be separated consist of a mixture of water and oil, whereby only the oil content is of interest within the PM2.5 particle separation. A suitable measuring method has been developed for this purpose, which can determine the harmful PM2.5 oil content separation efficiency from the PM2.5 droplet separation efficiency. Tests using the corresponding standard ÖNORMZ1263 and this special PM2.5 oil content separation measurement technique were executed and a quality factor assessment for a series of different cooling liquid mist filter media is shown.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 106950"},"PeriodicalIF":6.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675656","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
Natural deep eutectic solvent integrated with bulk liquid membrane system for salicylic acid removal from wastewater
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-19 DOI: 10.1016/j.psep.2025.107047
Khalid M. Abed , Badoor M. Kurji , Osama A. Mohsin , Adeeb Hayyan , Yousef Mohammed Alanazi , Jehad Saleh , Wan Jefrey Basirun , Bhaskar Sen Gupta , Zulhelmi Amir
{"title":"Natural deep eutectic solvent integrated with bulk liquid membrane system for salicylic acid removal from wastewater","authors":"Khalid M. Abed ,&nbsp;Badoor M. Kurji ,&nbsp;Osama A. Mohsin ,&nbsp;Adeeb Hayyan ,&nbsp;Yousef Mohammed Alanazi ,&nbsp;Jehad Saleh ,&nbsp;Wan Jefrey Basirun ,&nbsp;Bhaskar Sen Gupta ,&nbsp;Zulhelmi Amir","doi":"10.1016/j.psep.2025.107047","DOIUrl":"10.1016/j.psep.2025.107047","url":null,"abstract":"<div><div>This work describes an innovative approach for salicylic acid (SA) removal from wastewater using a bulk liquid membrane (BLM) technique incorporated with natural deep eutectic solvents (NADES) as the stripping phase. The preparation of NADES was achieved by mixing of choline chloride (ChCl) as a hydrogen bond acceptor (HBA) with lactic acid (LA) as a hydrogen bond donor (HBD). Screening studies were performed to select the best NADES molar ratio as a stripping agent for SA removal. The impact of various parameters such as the pH of the feed phase, initial concentration of SA, carrier concentration, mixing speed and temperature were investigated. The conductor-like screening model for real solvents (COSMO-RS) is used to analyse the SA removal and molecular interaction. The SA achieves an extraction efficacy of 73 % and a stripping efficacy of 90.28 % under the optimum conditions: HBA: HBD of 1:1, pH 2 of feed, 0.001 M of SA, 4 wt% of carrier concentration, 150 rpm of mixing speed and at 50 ºC. The SA extraction using the NADES-based BLM technique follows the consecutive first-order kinetic model with an extraction (K<sub>1</sub>) and stripping rate constants (K<sub>2</sub>) of 0.0128 and 0.0627 min<sup>−1</sup>, respectively. The SA transport mechanism through the NADES-based BLM adheres to the film theory for mass transfer. COSMO-RS confirmed the extraction efficiency through molecular interactions validated by a sigma profile and a sigma potential between the SA molecules and NADES. This study provides a new and cleaner route for using NADES as the stripping agent in the BLM system for water treatment.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107047"},"PeriodicalIF":6.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724306","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
Toxic and inhibitory effects of trichloroethylene on hydrolysis acidification with phenol and benzoic acid co-metabolism
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-19 DOI: 10.1016/j.psep.2025.107041
Yupei Song , Yushi Ma , Zhiqiang Shen , Yuexi Zhou , Huan Li
{"title":"Toxic and inhibitory effects of trichloroethylene on hydrolysis acidification with phenol and benzoic acid co-metabolism","authors":"Yupei Song ,&nbsp;Yushi Ma ,&nbsp;Zhiqiang Shen ,&nbsp;Yuexi Zhou ,&nbsp;Huan Li","doi":"10.1016/j.psep.2025.107041","DOIUrl":"10.1016/j.psep.2025.107041","url":null,"abstract":"<div><div>Hydrolysis acidification (HA), an efficient biological pretreatment technology, has demonstrated significant potential in degrading toxic and recalcitrant compounds. In this study, the reaction efficiency was utilized to investigate the toxic and inhibitory effects of trichloroethylene (TCE) on HA during the co-metabolism of phenol and benzoic acid. Results indicated that high TCE concentrations exerted an inhibitory effect on HA, with an EC<sub>50</sub> value of 75 mg/L. Phenol and benzoic acid as co-metabolized substrates for HA exhibited a unique response to the toxicity of TCE, that increasing concentrations of phenol and benzoic acid enhanced the dechlorinating degradation of TCE by promoting secretion of extracellular polymeric substance (EPS), however, causing partial cell death. At a TCE concentration of 75 mg/L, when the concentrations of phenol and benzoic acid were 375 mg/L, the dechlorination efficiencies of TCE were 58.53 % and 49.71 %, the acid yields were 60.35 and 50.93 mg COD/g VSS, the EPS concentrations were 40.16 and 33.77 mg COD/g VSS, the DNA concentrations in solution were 10.45 and 10.97 mg COD/g VSS(significantly higher than blank control group: 8.97 mg COD/g VSS), respectively. This enhancing effect was consistently observed across various concentrations of phenol and benzoic acid, and dechlorination degradation of TCE has also been effectively improved. The unique toxic response may be attributed to the compact structure of granular sludge and the increased secretion of EPS, which likely served as protective barriers for cells against TCE toxicity.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107041"},"PeriodicalIF":6.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675594","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
Unveiling priority control toxic metal in cover soil of anti-seepage tailings ponds: Insights from multi-media and probabilistic risk model
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-19 DOI: 10.1016/j.psep.2025.107034
Chenchen Li , Jin Yan , Jun Yao , Ruosong Xie , Hanjing Yu , Wanquan Yu , Qi Meng , Peng Dong
{"title":"Unveiling priority control toxic metal in cover soil of anti-seepage tailings ponds: Insights from multi-media and probabilistic risk model","authors":"Chenchen Li ,&nbsp;Jin Yan ,&nbsp;Jun Yao ,&nbsp;Ruosong Xie ,&nbsp;Hanjing Yu ,&nbsp;Wanquan Yu ,&nbsp;Qi Meng ,&nbsp;Peng Dong","doi":"10.1016/j.psep.2025.107034","DOIUrl":"10.1016/j.psep.2025.107034","url":null,"abstract":"<div><div>Pollution from tailings ponds is a major environmental concern, yet systematic studies on anti-seepage tailings ponds remain scarce. This study assesses the environmental and health risks posed by heavy metals (HMs) contamination in an anti-seepage copper-nickel tailings pond located in Southwest China. Long-term monitoring and pollution assessment were conducted for cover soil, leachate, groundwater, surface water, and river sediments, along with a health risk assessment for the cover soil. Results showed that while groundwater remained uncontaminated, the concentrations of Cr, Cd, Ni, and Cu in cover soil exceeded background values by 5.8, 5.4, 4.7, and 3.6 times, respectively, surpassing regulatory limits. Leachate samples exhibited strong seasonal variation, with HM concentrations peaking during the rainy season, and Ni exceeded regulatory limits in all samples. The reuse of leachate for dust suppression was identified as a major contributor to cover soil contamination. Health risk assessment revealed unacceptable non-carcinogenic and carcinogenic risks, primarily driven by Cr exposure. Further analysis using positive matrix factorization, health risk assessment models, and Monte Carlo simulation quantified industrial contributions at 8.83 % for non-carcinogenic risk and 7.5 % for carcinogenic risk. This study provides a novel framework for integrating pollution source analysis and risk assessment in anti-seepage tailings ponds, offering valuable insights for environmental risk management and process safety.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107034"},"PeriodicalIF":6.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747970","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
Electromembrane extraction of Cadmium (II) using a novel design of electrochemical cell with a flat sheet supported liquid membrane
IF 6.9 2区 环境科学与生态学
Process Safety and Environmental Protection Pub Date : 2025-03-19 DOI: 10.1016/j.psep.2025.107035
Noor R. Kadhim , Hussain M. Flayeh , Ali H. Abbar
{"title":"Electromembrane extraction of Cadmium (II) using a novel design of electrochemical cell with a flat sheet supported liquid membrane","authors":"Noor R. Kadhim ,&nbsp;Hussain M. Flayeh ,&nbsp;Ali H. Abbar","doi":"10.1016/j.psep.2025.107035","DOIUrl":"10.1016/j.psep.2025.107035","url":null,"abstract":"<div><div>The current study used an electromembrane extraction (EME) method to extract Cadmium from aqueous solutions. A supported liquid membrane (SLM) connected two glass chambers in a novel electrochemical cell design. The supported liquid membrane comprises a carrier and a polypropylene flat membrane impregnated with 1-octanol. Stainless steel and graphite plates were utilized as the anode and cathode, respectively. Cadmium was forced to travel through SLM during the removal process, which was done using an electric field. Effective parameters were examined with an interpretation of their influence on the removal efficiency of cadmium, including the kind of carrier, applied voltage, initial pH of the donor, and initial concentration of cadmium. Tris(2-ethylhexyl) phosphate (TEHP) and bis(2-ethylhexyl) phosphate (DEHP) were the two carriers that were employed. Based on the results, the applied voltage is the main factor that raises the cadmium mass rate across the membrane. Under ideal circumstances, 1.0 % v/v bis(2-ethylhexyl) phosphate in 1-octanol, 60 V applied voltage, pH of 5, initial cadmium level of 15 mg/L, 6 hours, and 1000 rpm stirring rate resulted in a removal efficacy of 90 %. The removal efficiency rose from 50 % at zero voltage to 90 % at 60 V in contrast with no voltage applied, confirming the potential use of EME in removing heavy metals.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107035"},"PeriodicalIF":6.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684713","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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