Environmental Technology最新文献_第7页

Numerical simulation of flow field structure and sand accumulation around railway subgrade. 铁路路基周边流场结构及积沙数值模拟。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2025-02-06 DOI: 10.1080/09593330.2025.2460241

Xue Chengjie, Zhang Kecun, An Zhishan, Zhang Hongxue, Pan Jiapeng

{"title":"Numerical simulation of flow field structure and sand accumulation around railway subgrade.","authors":"Xue Chengjie, Zhang Kecun, An Zhishan, Zhang Hongxue, Pan Jiapeng","doi":"10.1080/09593330.2025.2460241","DOIUrl":"10.1080/09593330.2025.2460241","url":null,"abstract":"Based on the current situation of railway sand damage in Tuotuohe region, the structure of wind-sand flow and the spatial distribution characteristics of sand particles on both sides of railway embankment are simulated by CFD Fluent software according to flow field measurement and wind tunnel test.The results demonstrate that the subgrade's shoulders are vulnerable to suffering from wind erosion; The sand particles' spatial deposition location and thickness are significantly affected by the incoming wind velocity and the railway subgrade. When the low incoming sand-carrying wind velocity, a lot of sand grains fall and are deposited at the railway embankment slope foot due to the sand-carrying wind velocity reduced. Meanwhile, the amount of leeward side deposited sand particles exceeds the windward side due to the vortex action to the subgrade leeward side region. As incoming sand-carrying wind velocity increases, eddy current development intensity at the leeward foot of the subgrade increases, which further results in a large number of sand particles accumulated and deposited at a certain distance away from the railway embankment slope foot; Sand particle deposition location on the railway embankment top surface mainly occurred closing to the leeward side's subgrade shoulder. The phenomenon of sand deposition is more serious in the condition of weak wind and multiple wind directions; Different ground surfaces affect the density of windy sand flow structure, indirectly affecting sand particle deposition thickness on both sides of the railway embankment.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3226-3241"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143364089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Waste PET bottle-derived carbon for defluorination of fluoride-polluted water. 废PET瓶衍生碳用于氟污染水的除氟。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2025-01-05 DOI: 10.1080/09593330.2024.2447960

Daniel Ocloo, Frank Ofori Agyemang, Perseverance Dzikunu, Bennetta Koomson, Godfred Ohemeng-Boahen, Elizabeth Henewaa Akoto, Anthony Kwesi Martey

{"title":"Waste PET bottle-derived carbon for defluorination of fluoride-polluted water.","authors":"Daniel Ocloo, Frank Ofori Agyemang, Perseverance Dzikunu, Bennetta Koomson, Godfred Ohemeng-Boahen, Elizabeth Henewaa Akoto, Anthony Kwesi Martey","doi":"10.1080/09593330.2024.2447960","DOIUrl":"10.1080/09593330.2024.2447960","url":null,"abstract":"This study synthesises expanded graphite (EG) from graphitised carbon from waste polyethylene terephthalate (PET) bottles. The adsorbent material was characterised using FTIR, XRF, XRD, SEM, Raman Spectroscopy, and BET surface area analysis. The synthesised EG defluorinated wastewater, utilising response surface methodology (RSM) for experimental design and optimisation. XRD patterns confirmed the successful synthesis of graphite and EG, demonstrating structural modifications. Raman spectra indicated higher crystalline order in EG, with D and G band shifts and an increased ID/IG intensity ratio from 0.89-1.04. BET analysis revealed a specific surface area of 247.1 m²/g. . FTIR analysis showed abundant functional groups, particularly hydroxyl (-OH) and alkene (C = C). Batch adsorption experiments revealed that fluoride adsorption onto EG depended on pH, time, and initial fluoride concentration. Optimal conditions for fluoride removal, determined using RSM with central composite design (CCD), demonstrated a maximum fluoride removal rate of 97%. Isotherm data fitted both Langmuir and Freundlich model, and kinetics data aligned well with the pseudo-first-order model. ANOVA showed significant effects of contact time, pH, adsorbent dose, and initial fluoride concentration on removal efficiency. The model's R² value of 0.98 and lack of fit value of 0.1554 confirmed the quality of the second-order polynomial model. Optimal conditions for maximum fluoride removal efficiency of 97% were validated at 5 mg/L fluoride concentration, pH 4, adsorbent dose of 5 g/L, and a contact time of 30 min. Therefore, the present study demonstrated efficient fluoride-polluted water treatment using waste-derived EG.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2857-2880"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142931091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced remediation of oil-contaminated mineral sand by the controlled release of a surfactant from calcium alginate capsules. 海藻酸钙胶囊控释表面活性剂对石油污染矿砂的修复作用。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2025-01-15 DOI: 10.1080/09593330.2025.2450558

Rui Qi, Ke Chen, Tim P Jones, Sérgio D N Lourenço

{"title":"Enhanced remediation of oil-contaminated mineral sand by the controlled release of a surfactant from calcium alginate capsules.","authors":"Rui Qi, Ke Chen, Tim P Jones, Sérgio D N Lourenço","doi":"10.1080/09593330.2025.2450558","DOIUrl":"10.1080/09593330.2025.2450558","url":null,"abstract":"The remediation of oil-contaminated soil poses significant environmental challenges, often necessitating innovative approaches for effective and sustainable solutions. This study focuses on the synthesis, characterisation, and application of biodegradable capsules loaded with surfactant for enhanced oil remediation of a clean sand. By controlling the release properties of capsules, the research aims to overcome the limitations of conventional surfactant-based remediation methods, such as rapid washout and reduced efficacy over time. The study outlines a systematic approach, beginning with the synthesis of capsules containing surfactant cargo using the ionic gelation technique, and charactering the capsules' physical attributes. Subsequently, laboratory washing tests were designed to evaluate the efficiency of capsules in enhancing the remediation of oil-contaminated sand, comparing their performance with conventional surfactant application methods. The results show that the capsules enhanced the efficiency of oil removal during the washing process by the controlled release of surfactants. With the use of capsules, oil removal rates of the contaminated sand increased from 29.56% (blank group) to 59.90%, 68.67%, and 76.72% (at 5%, 10%, and 15%, capsule content (mass of capsules by 100 g mass of sand), respectively). Compared to the direct use of surfactants, the capsule approach exhibited higher performance, which increased oil removal efficiency by 95.9%, 97.0%, and approximately 100%, respectively. A release mechanism of higher oil removal ability is proposed based on the measurement of the washing water's surface tension. The findings highlight the potential of polymeric capsules for oil remediation, paving the way for the development of self-remediation approaches in contaminated sands.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2980-2992"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143002552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of plant-based coagulants for turbidity removal and coagulant dosage prediction using machine learning. 植物基混凝剂去除浊度的评价和使用机器学习的混凝剂用量预测。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-11 DOI: 10.1080/09593330.2024.2439183

Poloko Ivy Namane, Moatlhodi Wise Letshwenyo, Abid Yahya

{"title":"Evaluation of plant-based coagulants for turbidity removal and coagulant dosage prediction using machine learning.","authors":"Poloko Ivy Namane, Moatlhodi Wise Letshwenyo, Abid Yahya","doi":"10.1080/09593330.2024.2439183","DOIUrl":"10.1080/09593330.2024.2439183","url":null,"abstract":"This study investigates the use of six plant-based coagulants - Acacia erioloba, Ricinodendron rautanenii, Schinziophyton rautanenii, Peltophorum africanum, Delonix regia, and Maerua angolensis for the removal of turbidity from wastewater effluent. The coagulants were characterized using Scanning Electron Microscopy (SEM) to determine morphological structure, X-ray fluorescence (XRF) to assess chemical composition, and X-ray diffraction to analyse the molecular structure. The coagulation process was evaluated using jar tests with varying coagulant dosages and pH levels. SEM images revealed irregular, rough surfaces, with all materials being amorphous and non-crystalline. Significant levels of essential elements, including iron (Fe), calcium (Ca), sulphur (S), and potassium (K) were revealed. Turbidity removal efficiency fluctuated with pH, showing optimal results under alkaline conditions. Notably, strong negative correlations between pH and turbidity were observed for all coagulants except Peltophorum africanum at a dosage of 20 g/L. Doubling the coagulant volume achieved turbidity reductions between 59% and 92.24%, except for Acacia erioloba and Ricinodendron rautanenii at a dosage of 40 g/L, which showed increased turbidity. The study also employed machine learning techniques to analyse the data and predict the most effective coagulant dosage under different pH conditions. These findings suggest that plant-based coagulants could be viable alternatives to chemical coagulants, with machine learning providing accurate predictions of coagulation performance. Further research is recommended to explore the capabilities of these natural coagulants fully.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2570-2585"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142812551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Recovery of protein from tofu whey wastewater using protein-based coagulant. 蛋白基混凝剂回收豆腐乳清废水中的蛋白质。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-15 DOI: 10.1080/09593330.2024.2439067

Widyarani, Gina Nur Annisa, Dhini Annisa Rahmasari Kanto, Atti Sholihah, Sambas, Yessie Widya Sari, Dani Permana

{"title":"Recovery of protein from tofu whey wastewater using protein-based coagulant.","authors":"Widyarani, Gina Nur Annisa, Dhini Annisa Rahmasari Kanto, Atti Sholihah, Sambas, Yessie Widya Sari, Dani Permana","doi":"10.1080/09593330.2024.2439067","DOIUrl":"10.1080/09593330.2024.2439067","url":null,"abstract":"Tofu whey wastewater is the protein-rich liquid by-product of tofu production that has the potential as a source stream for biobased products. Coagulation can be used to recover protein from tofu whey. Biobased coagulants are alternatives for polymer- and metal-based coagulants, particularly if the precipitate is recovered and used for further processes. The tofu whey coagulation performance of three protein-based coagulants, namely soy protein isolate, Moringa oleifera seed, and isolate of Moringa seed protein, was determined with the jar test method. The pH (4, 5, 7, 9) and protein dosage (33-191 mg-protein/L) were varied. The results were compared with chitosan, as a benchmark for biobased coagulants, with similar pH variation and 100-800 mg-chitosan/L dosage variation. Our experiment showed that the optimum pH for protein coagulation was 4 (the initial pH of the tofu whey). Up to 95% turbidity could be removed, with chitosan shown to be the most effective coagulant. On the other hand, chitosan only removed up to 9% of organics as chemical oxygen demand (COD), while soy protein isolate could remove up to 20%. The highest protein removal was obtained by soy protein isolate (35%) followed by Moringa seed (34%), chitosan (25%), and Moringa seed protein (13%). Meanwhile, coagulation with soy protein isolate could recover 11% protein in the precipitate at 60% protein content. Higher protein removal compared to COD suggests a preference towards protein coagulation compared with other organics. Our results suggest that protein-based materials can be applied to recover proteins from tofu whey.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2546-2557"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142827940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Adsorption adaptive response exposed to algal organic matter: correlation to the characteristics of granular activated carbon. 藻类有机物的吸附适应性反应：与颗粒活性炭特性的关系。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2025-01-21 DOI: 10.1080/09593330.2025.2453949

Fei Han, Luming Ding, Xing Li, Zhiwei Zhou, Zedong Lu

{"title":"Adsorption adaptive response exposed to algal organic matter: correlation to the characteristics of granular activated carbon.","authors":"Fei Han, Luming Ding, Xing Li, Zhiwei Zhou, Zedong Lu","doi":"10.1080/09593330.2025.2453949","DOIUrl":"10.1080/09593330.2025.2453949","url":null,"abstract":"The release of algal organic matter (AOM) during seasonal algal blooms increases the complexity and heterogeneity of natural organic matter (NOM) in water sources, altering its hydrophilic-hydrophobic balance and posing significant challenges to conventional water treatment processes. This study aims to verify whether the (Granular activated carbon) GAC selected for the adsorption of NOM in sand filtration effluent can adapt to water quality fluctuations caused by AOM release, and identify the criteria influencing GAC adsorption performance. Results indicated that external surface area, mesopore volume, pore size and surface functional groups were key indicators of GAC adsorption performance. AOM exposure increased the soluble microbial byproducts (SMP) and humic acid components in sand filter effluent, and induced the presence of high molecular weight biopolymers. The removal characteristics of sand filtration effluent spiked with AOM indicated that GAC preferentially adsorbed unsaturated bonds and aromatic compounds, as well as organic acids like fulvic and humic acids. Its adsorption primarily involved physical and chemical processes such as pore filling, hydrophobic interactions, and reactions between chemical functional groups. AOM exposure led to an increase in hydrophilic macromolecules such as polysaccharides and proteins, causing competitive adsorption and pore blockage. This study provided a theoretical basis for the efficient and rapid selection of GAC during outbreaks of AOM pollution.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3107-3119"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143002545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 of heavy metal contamination in soil-groundwater systems at contaminated sites. 污染场地土壤-地下水系统重金属污染预测。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2025-01-20 DOI: 10.1080/09593330.2025.2451257

Jie Jiang, Junlin Chen, Xiaoduo Ou, Haohao Luo, Shufei Wang

{"title":"Prediction of heavy metal contamination in soil-groundwater systems at contaminated sites.","authors":"Jie Jiang, Junlin Chen, Xiaoduo Ou, Haohao Luo, Shufei Wang","doi":"10.1080/09593330.2025.2451257","DOIUrl":"10.1080/09593330.2025.2451257","url":null,"abstract":"The diffusion of heavy metal pollutants in polluted industrial areas can cause severe environmental pollution in surrounding areas. However, the migration of pollutants into groundwater is a complex process that requires consideration of local geological and hydrological conditions, solute transport, and geochemistry factors to better predict the flow paths and plume dispersion of pollutants. This study is based on numerical models of Darcy's law and the Richards equation. A numerical model is used to predict the pollution risk of a certain abandoned metallurgical site. The results indicate that the risk of heavy metal leaching is extremely high under natural conditions, potentially affecting downstream reservoirs after 1500 days. The use of permeable reactive barriers (PRBs) can effectively prevent the migration of heavy metals. However, even with PRBs, 28%-30% of pollutants may still continue to spread outward through lateral flow pathways. The use of impermeable Funnel-and-gate PRB design can effectively reduce lateral pollutant migration, reducing lateral leakage by up to 27%. Based on these results, the rational design of PRBs can effectively reduce remediation costs and time, enhance groundwater remediation effectiveness, and provide strong support for environmental protection and ecological health.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3011-3023"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143002629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Pollutant removal and greenhouse gas emissions in horizontal subsurface flow constructed wetlands with iron ore treating ammonium-rich wastewater. 铁矿水平潜流人工湿地处理富氨废水的污染物去除及温室气体排放

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-31 DOI: 10.1080/09593330.2024.2443601

Yan Zhang, Xinhua Li, Hongyun Dong, Piet N L Lens

{"title":"Pollutant removal and greenhouse gas emissions in horizontal subsurface flow constructed wetlands with iron ore treating ammonium-rich wastewater.","authors":"Yan Zhang, Xinhua Li, Hongyun Dong, Piet N L Lens","doi":"10.1080/09593330.2024.2443601","DOIUrl":"10.1080/09593330.2024.2443601","url":null,"abstract":"Horizontal subsurface flow constructed wetlands (HFCWs) are capable of eliminating organic matter and nitrogen while emitting less methane (CH4) and nitrous oxide (N2O) than free water surface flow wetlands. However, the simultaneous removal of pollutants and reduction of greenhouse gases (GHG) emissions from high-strength wastewater containing high levels of organic matter and ammonium nitrogen (NH4+-N) has not get been investigated. The influent COD concentration affected the efficiency of nitrogen removal, GHG emissions and the presence of iron from iron ore, but the COD and TP removal efficiencies remained unaffected. CO2 and CH4 fluxes were significantly influenced by influent COD concentrations, whereas less N2O emissions were obtained during 7d. The highest CO2 and CH4 fluxes, along with the GHG emissions, were observed in HFCWs with COD concentrations of 375.6 mg/L and NH4+-N concentrations of 159.0 mg/L at a COD/N ratio of 2.4. Conversely, the lowest CH4 (-1.72 mg/m2/h) and N2O fluxes (0.13 mg/m2/h) were recorded in HFCWs with COD concentrations of 375.6 mg/L and NH4+-N concentrations of 162.4 mg/L at a COD/N of 4.5, although nitrogen removal was weak in these HFCWs. HFCWs at a COD/N ratio of 3.6 exhibited greater removal of nitrogen and other pollutants, along with a lower global warming potential (GWP). In conclusion, the concentrations of organic matter and NH4+-N in wastewater affected both pollutant removal and GHG emissions. The simultaneous enhancement of pollutant removal and the reduction of GHG emissions can be achieved in HFCWs with a COD/N ratio of 3.6.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2696-2707"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142909505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 of modified ion exchange resins for phosphorus removal from glyphosate by-product salt. 改性离子交换树脂脱除草甘膦副产盐中磷的研究。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-31 DOI: 10.1080/09593330.2024.2447627

Qisheng Wu, Sen Wang

{"title":"Study of modified ion exchange resins for phosphorus removal from glyphosate by-product salt.","authors":"Qisheng Wu, Sen Wang","doi":"10.1080/09593330.2024.2447627","DOIUrl":"10.1080/09593330.2024.2447627","url":null,"abstract":"In order to achieve the goal of phosphate removal from glyphosate by-product salts, zirconium and zinc ions were successfully loaded onto D202 resin by co-precipitation modification method in this study, and their effectiveness in phosphate removal was evaluated under various conditions. The results of static adsorption experiments showed that the Zr/Zn@D202 resin effectively reduced the phosphate concentration in the glyphosate by-product salts from 10 mg/L to less than 0.1 mg/L, which met the national level emission standard (P < 0.5 mg/L). The adsorption capacity of Zr/Zn@D202 resin was 31.26 mg/g at pH 3, temperature 30 ℃, and adsorption time 2 h. The phosphate removal rate was 99.5%. The phosphate removal efficiency of Zr/Zn@D202 resin was maintained at 92% after five cycles. The samples were characterized by SEM, EDS, XRD, FT-IR and XPS. The characterization results confirmed the successful loading of zirconium and zinc ions, and elucidated that the adsorption mechanism of phosphate mainly involves the increase of the adsorption sites on the surface of the ion-exchange resin and the ion-exchange process. The pseudo-first-order model accurately described the adsorption kinetics, while the adsorption isotherms followed the Langmuir model.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2812-2826"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142909514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Use of rotating membranes for air-to-liquid mass transfer of carbon dioxide to enhance algal growth. 利用旋转膜进行二氧化碳的气液传质，以促进藻类生长。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-31 DOI: 10.1080/09593330.2024.2445328

Peter Ofuje Obidi, Alex A Lunka, Alireza Fallahi, David J Bayless

{"title":"Use of rotating membranes for air-to-liquid mass transfer of carbon dioxide to enhance algal growth.","authors":"Peter Ofuje Obidi, Alex A Lunka, Alireza Fallahi, David J Bayless","doi":"10.1080/09593330.2024.2445328","DOIUrl":"10.1080/09593330.2024.2445328","url":null,"abstract":"A novel air-to-liquid mass transfer system using wetted rotating membranes was designed to enhance air-to-liquid carbon dioxide (CO2) mass transfer efficiency. Traditional methods, such as sparging, are energy-intensive, but the rotating membrane reduces energy demands by optimising membrane wetting via rotational motion. Experimental tests were conducted using a small-scale system with a membrane width of 0.64 m and loop size of 2 to 5 m, with rotational speeds between 0.0 and 0.78 m/s. CO2 flux increased by up to 45%, achieving maximum uptake rate of 9.14 mg CO2/min/m2 at 100% speed. An empirical model was developed to predict mass transfer rates under varying operational conditions, and model validation showed a strong correlation with experimental data (R2 = 0.9668). Preliminary techno-economic analysis estimated that scaling the system to meet the CO2 demands of a hypothetical 500,000 L raceway, 915 membranes would be required, utilising ∼223 m2 (13.4%) of 1667 m2 surface area, assuming a 0.3 m depth, 12 g/m2/day growth rate, and algae with 50% carbon by weight. The system's energy consumption was measured at 17.1 J/g CO2 captured, representing a 90% reduction in power usage compared to conventional sparging systems, which typically require ∼627 W per 8.3 m2 of membrane surface area. Based solely on electricity costs of $0.10/kW-hr, the cost of capturing atmospheric CO2 was estimated at $1550 per ton. This marks a significant improvement over existing technologies, enhancing commercial viability. Future work will validate the system with Chlorella vulgaris and scale to optimise CO2 capture and reduce costs.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2747-2765"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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