{"title":"Co-extraction of Fe, Cr, Ni and Cu from stainless steel dust and copper slag using aluminum dross-based hybrid reductant","authors":"Xiaoqing Chen , Nan Wang , Min Chen , Hongda Yao","doi":"10.1016/j.seppur.2025.133759","DOIUrl":"10.1016/j.seppur.2025.133759","url":null,"abstract":"<div><div>An effective and low-carbon method for extracting valuable metals from stainless steel dust (SSD) and copper slag (CS) was developed, using an aluminum dross-based hybrid reductant. The effects of reduction temperature and aluminum dross (AD) proportion in the hybrid reductant on the metal recovery were investigated. High temperature promotes metal oxides reduction, and the recovery degree initially increases before decreasing as the proportion of AD increases. However, excessive addition of AD in the hybrid reductant causes spinel phase to precipitate in the Al<sub>2</sub>O<sub>3</sub>-CaO-SiO<sub>2</sub>-MgO system, which inhibits metal particle aggregation and growth. At 1500℃ and the proportion of 80 % AD in the hybrid reductant, the maximum recovery degrees of Fe, Cr, Ni, and Cu from SSD and CS are 97.52 %, 95.30 %, 97.63 %, and 97.21 %, respectively. The prepared low-carbon ferroalloy contains 72.65 % Fe, 21.29 % Cr, 3.76 % Ni, 1.36 % Cu, and less than 0.94 % carbon content. Furthermore, the secondary slag is primarily composed of the stable phases Ca<sub>2</sub>Al<sub>2</sub>SiO<sub>7</sub>, Ca<sub>2</sub>MgSi<sub>2</sub>O<sub>7</sub> and MgAl<sub>2</sub>O<sub>4</sub>, with hazardous concentrations of Cr, Cu, Zn and Pb ranging from 50-76 ppm, 15–23 ppm, 0.37–0.65 ppm and 0.02–0.04 ppm, respectively. This co-extraction process allows for the efficient and low-carbon treatment of multisource metallurgical solid waste.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"375 ","pages":"Article 133759"},"PeriodicalIF":8.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137226","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}
Aneta Kohnke , Patrycja Wilczewska , Jakub Brzeski , Karol Szczodrowski , Jacek Ryl , Anna Malankowska , Aleksandra Bielicka-Giełdoń , Ewa M. Siedlecka
{"title":"Holes-mediated photocatalytic activation of PDS for enhanced ifosfamide removal with MWCNTs-X/DBOB: role of Bi4O5Br2 and Bi24O31Br10 phases","authors":"Aneta Kohnke , Patrycja Wilczewska , Jakub Brzeski , Karol Szczodrowski , Jacek Ryl , Anna Malankowska , Aleksandra Bielicka-Giełdoń , Ewa M. Siedlecka","doi":"10.1016/j.seppur.2025.133747","DOIUrl":"10.1016/j.seppur.2025.133747","url":null,"abstract":"<div><div>Bismuth-rich oxybromide (Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>) was modified with Multi-Walled Carbon Nanotubes (MWCNTs) functionalized with −H, –OH, and –COOH groups, which induced the appearance of Bi<sub>24</sub>O<sub>31</sub>Br<sub>10</sub> and Bi<sup>0</sup> phases after solvothermal synthesis. This research aims to develop a sustainable, energy-efficient photocatalytic water purification system to enhance PDS activation and persistent organic pollutants removal. The efficiency of solar-driven photocatalytic persulfate activation and removal of the cytostatic drug ifosfamide (IF) in the presence of MWCNTs-X/DBOB (where DBOB = Bi<sub>24</sub>O<sub>31</sub>Br<sub>10</sub>-Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>; X=H, OH, COOH) was investigated. A heterojunction formed between Bi<sub>24</sub>O<sub>31</sub>Br<sub>10</sub> and Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>, resulting in effective hole-mediated activation of PDS by Bi<sub>24</sub>O<sub>31</sub>Br<sub>10</sub> and the generation of O<sub>2</sub><sup>•−</sup> by Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>, while MWCNTs and metallic Bi served as electron sinks. The spatial separation of photogenerated charge carriers facilitated efficient PDS activation, particularly using MWCNTs-H/DBOB as a photocatalyst. In PDS-assisted photocatalysis, hydroxyl radicals predominantly played a crucial role in IF removal at pH 6.7, while at pH 3, sulfate and hydroxyl radicals were the main contributors to IF decomposition. Theoretical calculations showed that <sup>•</sup>OH and SO<sub>4</sub><sup>•-</sup> radicals decomposed IF by H abstraction, whereas the SET pathway was favorable for SO<sub>4</sub><sup>•-</sup> radicals. The presence of inorganic ions (Cl<sup>-</sup>, NO<sub>3</sub><sup>–</sup>, HPO<sub>4</sub><sup>2-</sup>, HCO<sub>3</sub><sup>–</sup>) inhibited IF decomposition by adsorption at the photocatalyst surface, while humic acids enhanced IF degradation, facilitating the PDS activation through energy absorption and electron transfer. In further studies, we will evaluate 2.5 %MWCNTs-X/DBOB reusability under continuous operation conditions.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"375 ","pages":"Article 133747"},"PeriodicalIF":8.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145896","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":"Integration of solar photovoltaic panel and A46 phase change material in double-slope solar still: A progressive approach for performance enhancement","authors":"Ramasamy Dhivagar , Subbarama Kousik Suraparaju , Perumalsamy Jidhesh , Sung Chul Kim","doi":"10.1016/j.seppur.2025.133754","DOIUrl":"10.1016/j.seppur.2025.133754","url":null,"abstract":"<div><div>The growing scarcity of freshwater resources and the energy-intensive nature of traditional desalination techniques underscores the urgent need for sustainable alternatives. Double slope solar stills (DSS) have emerged as an environmentally friendly solution for water purification. This work investigates a novel approach that enhances energy conversion, thermal regulation, and freshwater output by integrating a solar photovoltaic (SPV) panel on the opposite side of a DSS with A46 phase change material (PCM). In addition to producing distillate, the DSS-SPV&A46 generates electricity which resulting in dual benefits. Furthermore, the A46 PCM maintains stable evaporation and condensation by reducing temperature fluctuations due to shadowing effect. In this experimentation, the cumulative productivity, energy and exergy efficiencies of DSS-SPV&A46 outperformed the conventional DSS by 25.6 %, 8.8 % and 9.1 %, respectively. The overall energy and exergy efficiencies enhancement in DSS-SPV&A46 were about 56.7 % and 3.71 %, respectively. Furthermore, the SPV panel produced a peak power output of 47.3 W, with electrical and thermal efficiencies of 13.4 % and 35.7 %, respectively. An economic analysis revealed that the cost per liter (CPL) of water and a payback period (PBP) were reduced to 10.3 % and 9.3 % in DSS-SPV&A46 than DSS, respectively, thereby confirming the economic feasibility. Moreover, the sensitivity analysis showed that DSS-SPV&A46 long lifespans and low-interest financing make it even more feasible and could reduce production cost (PC) to around 8.47 USD/m<sup>3</sup>. Finally, the study found that DSS-SPV&A46 is a reliable, affordable, and sustainable way to cogenerate water and power in an ecologically safe behavior.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"374 ","pages":"Article 133754"},"PeriodicalIF":8.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137233","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 the efficiency of photocatalytic membrane reactors for textile effluent remediation","authors":"Saurav Bhattacharyya , Marc Heran , Sudip Chakraborty , Vincenza Calabro , Catia Algieri","doi":"10.1016/j.seppur.2025.133714","DOIUrl":"10.1016/j.seppur.2025.133714","url":null,"abstract":"<div><div>The textile industry is a major global water consumer and so a significant contributor of wastewater containing recalcitrant pollutants, including azo dyes, which are difficult to degrade and pose severe environmental risks. This study explored an innovative photocatalytic membrane reactor that utilizes polyethersulfone membranes embedded with titanium dioxide dispersed on graphene oxide nanosheets (TiO<sub>2</sub>-GO nanocomposites) to effectively treat real textile wastewater. The synergistic integration of GO and TiO<sub>2</sub> can enhance photocatalytic activity and significantly improve the properties of the pristine PES membrane. The membranes were characterized using XRD, SEM-EDX, FTIR, and Raman spectroscopy, revealing a successful integration of TiO<sub>2</sub>-GO nanocomposites. Photocatalytic membranes exhibited better mechanical properties and antifouling performance compared to pristine PES membranes. The novel double-sided UV irradiation approach improved photocatalytic efficiency, achieving 92<!--> <!-->% and 96<!--> <!-->% decolorization for synthetic and real wastewater, respectively. In addition, the COD removal was 56<!--> <!-->% and 78<!--> <!-->% for synthetic and real matrices. The photocatalytic membranes exhibited reusability and minimal fouling, highlighting their potential for sustainable wastewater treatment. This study contributes significantly to advancing the use of photocatalytic membranes for industrial-scale remediation of textile wastewater.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"375 ","pages":"Article 133714"},"PeriodicalIF":8.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137235","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}
Guanghui Li , Qianqian Duan , Xiduan Yang , Cheng Huang , Changye Mang , Jun Luo
{"title":"α-Fe2O3/MnO2 heterojunction catalysts with enhanced low-temperature activity for selective N2 production in NH3-SCR","authors":"Guanghui Li , Qianqian Duan , Xiduan Yang , Cheng Huang , Changye Mang , Jun Luo","doi":"10.1016/j.seppur.2025.133735","DOIUrl":"10.1016/j.seppur.2025.133735","url":null,"abstract":"<div><div>Current commercial catalysts remain inadequate for industrial kiln operations under low-temperature exhaust conditions. Consequently, the development of catalysts with enhanced low-temperature NH<sub>3</sub>-SCR activity and elevated NO<sub>x</sub> reduction efficiency has become a strategic focus. In this study, a cryptomelane-type MnO<sub>2</sub> catalyst was synthesized through a one-step hydrothermal method, and an in-situ heterostructure was developed via α-Fe<sub>2</sub>O<sub>3</sub> doping to enhance N<sub>2</sub> selectivity in NH<sub>3</sub>-SCR. The results demonstrate that α-Fe<sub>2</sub>O<sub>3</sub> incorporation elevates Mn<sup>4+</sup> concentration, thereby promoting NH<sub>3</sub> adsorption and NH<sub>4</sub><sup>+</sup> formation, which synergistically accelerates NO reduction. Additionally, surface-active oxygen species and Brønsted acid sites initially increased with α-Fe<sub>2</sub>O<sub>3</sub> content but diminished when exceeding an optimal doping level. Under simulated flue gas conditions (500 ppm NO, 1000 ppm NH<sub>3</sub>, 5 % O<sub>2</sub>, 5 % H<sub>2</sub>O, and a gas hourly space velocity of 36,000 h<sup>−1</sup>), the 5 wt% α-Fe<sub>2</sub>O<sub>3</sub>-loaded catalyst exhibited enhanced low-temperature catalytic performance, achieving 82 % N<sub>2</sub> selectivity at 175 °C, compared to 74 % at 200 °C. The α-Fe<sub>2</sub>O<sub>3</sub>/MnO<sub>2</sub> catalyst demonstrated exceptional catalytic activity at low temperatures, suggesting a promising strategy for industrial flue gas denitrification.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"374 ","pages":"Article 133735"},"PeriodicalIF":8.1,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137241","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}
Muhammad Yousif , Meiling Zhang , Bilqees Hussain , Talha Khan , Wenhui Hu , Min Li , Xupin Zhuang , Zhangang Wang , Hongxia Wang , Tong Lin
{"title":"Effective PFAS removal from water using vinyltrimethoxysilane-modified polyethyleneimine-aramid-banana nanocellulose aerogels","authors":"Muhammad Yousif , Meiling Zhang , Bilqees Hussain , Talha Khan , Wenhui Hu , Min Li , Xupin Zhuang , Zhangang Wang , Hongxia Wang , Tong Lin","doi":"10.1016/j.seppur.2025.133667","DOIUrl":"10.1016/j.seppur.2025.133667","url":null,"abstract":"<div><div>The persistent toxicity and ubiquitous presence of per- and polyfluoroalkyl substances (PFAS) in the environment require advanced solutions for their removal from water, especially at trace levels. This study presents an innovative aerogel adsorbent that addresses this challenge through synergistic material design. The aerogel was prepared using a lyophilization technique combining banana cellulose, polyethyleneimine (PEI), and aramid, followed by surface functionalization with vinyl trimethoxysilane (VTMS). It achieved unprecedented PFAS removal efficiency. From an initial concentration of 1000 ppb, it reduced PFAS levels to 4 ppt in 2–3 h, exceeding EPA standards and outperforming most reported adsorbents. Morphological parameters such as sheet thickness (optimal at 1 mm) and structural porosity critically influence adsorption kinetics, with hollow configurations maximizing performance. Adsorption efficiency was influenced by pH and surfactant type. Nonionic and cationic surfactants improved PFAS uptake, while anionic surfactants and competing anions reduced it. The aerogel exhibits broad-spectrum PFAS affinity, particularly for long-chain compounds, driven by a synergistic interplay between VTMS (imparting hydrophobicity), PEI (facilitating electrostatic interactions), and aramid (enabling hydrogen bonding). Remarkably, the aerogel retains >90 % adsorption capacity over 15 consecutive adsorption–desorption cycles, demonstrating robust reusability. This work establishes VTMS-modified PEI-banana aramid aerogels as a scalable, high-performance solution for mitigating PFAS contamination in aquatic systems, with implications for sustainable water treatment technologies.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"375 ","pages":"Article 133667"},"PeriodicalIF":8.1,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146055","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}
Sen Yang , Dong Li , Yanjun Zhu , Jifang Zheng , Sibo Fu , Huiping Zeng , Jie Zhang
{"title":"Chitosan-modified quartz sand accelerates the start-up of biofilter: insights into performance, microbial characteristics, and functional genes","authors":"Sen Yang , Dong Li , Yanjun Zhu , Jifang Zheng , Sibo Fu , Huiping Zeng , Jie Zhang","doi":"10.1016/j.seppur.2025.133743","DOIUrl":"10.1016/j.seppur.2025.133743","url":null,"abstract":"<div><div>In this study, chitosan-modified quartz sand (CS-quartz sand) was prepared. Experimental results showed that the CS-quartz sand biofilter shortened the start-up period by 33 %, reducing it from 45 days (with conventional quartz sand) to 27 days. CS-quartz sand exhibited strong resistance to water quality fluctuations and maintained stable performance under influent Mn<sup>2+</sup> concentrations ranging from 1.0 to 3.0 mg/L. Extended Derjaguin-Landau-Verwey-Oxerbeek (XDLVO) theory analysis revealed that these advantages stemmed from a significant reduction in the energy barrier and enhanced interfacial interaction energy between microorganisms and the filter material. The qPCR and 16S rRNA analyses demonstrated that the modified filter material shortened the start-up period of the biofilter and improved the purification capacity by increasing the expression of critical genes (amoA, nxrA, cumA, mnxG) and the abundance of vital functional bacteria (AOB, NOB, MnOB). These findings provided a feasible strategy for rapid start-up and practical engineering application of biofilters.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"374 ","pages":"Article 133743"},"PeriodicalIF":8.1,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137238","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}
Lei Qin, Shuyuan Hu, Huan Yi, Wenjun Wang, Cui Lai, Shiyu Liu, Dengsheng Ma, Tao Tong, Hao Deng, Guangjie Lv
{"title":"B-doped lotus pollen biochar photothermal activating periodate for acetaminophen degradation by non-radical pathway: Significance of thermal effect from the photothermal process","authors":"Lei Qin, Shuyuan Hu, Huan Yi, Wenjun Wang, Cui Lai, Shiyu Liu, Dengsheng Ma, Tao Tong, Hao Deng, Guangjie Lv","doi":"10.1016/j.seppur.2025.133707","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133707","url":null,"abstract":"Periodate (PI)-based advanced oxidation emerges as a key solution for environmental remediation. However, existing activation methods are energy-intensive, driving demand for sustainable alternatives. In this study, a photothermal activation method for PI based on B-doped lotus pollen biochar (CB500) was developed to degrade acetaminophen (ACE). In the CB500/PI photothermal activation system, ACE could be completely degraded within 15 min, which was 17.71 times faster than light activation system. Quenching experiments, electron paramagnetic resonance, and electrochemical tests proved singlet oxygen (<sup>1</sup>O<sub>2</sub>) was the main reactive species. Photothermal contribution analysis revealed that thermal effects predominated in the system. Besides, the system showed a high resistance to interference. Its degradation capability was almost unaffected by natural organic matter (NOM) and maintained excellent degradation performance over a wide pH range. Moreover, this system exhibited potential for ACE degradation in actual water samples. This work provides novel insights into the advancement of photothermal PI activation.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"1 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133633","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}
Zongjie He , Chu Huang , Carlos Carrillo , Mason Woodard , Jianjia Yu
{"title":"Highly scalable honeycomb-like aminated PVDF-g-PEI hollow fiber membranes for direct air capture of CO2","authors":"Zongjie He , Chu Huang , Carlos Carrillo , Mason Woodard , Jianjia Yu","doi":"10.1016/j.seppur.2025.133745","DOIUrl":"10.1016/j.seppur.2025.133745","url":null,"abstract":"<div><div>The rising level of CO<sub>2</sub> in the atmosphere requires highly scalable and efficient sorbents for direct air capture. In this study, a scalable aminated polyvinylidene fluoride grafted polyethyleneimine (PVDF-g-PEI) hollow fiber (HF) membrane was fabricated with stable and accessible amine groups. The aminated PVDF-g-PEI HF membrane was characterized using different techniques to verify the number of grafted amines, and the effect of amine content on the membrane structure and CO<sub>2</sub> adsorption performance were thoroughly examined. The results showed that the aminated PVDF-g-PEI HF membrane had a highly porous, honeycomb-like structure when the PEI loading was 6.6 wt%. This structure provided the best access to the grafted amine groups and resulted in the highest CO<sub>2</sub> adsorption capacity of 0.5 mmol-CO<sub>2</sub> per gram of membrane under the atmospheric conditions. The aminated PVDF-g-PEI membrane demonstrated a 96.7 % regeneration capability in 20 continuous long-term cyclic CO<sub>2</sub> adsorption–desorption experiments. Compared to the conventional amine-functionalized powdered sorbents for direct air capture of CO<sub>2</sub>, the aminated PVDF-g-PEI HF membranes shows higher scalability for large scale applications.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"374 ","pages":"Article 133745"},"PeriodicalIF":8.1,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137240","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}
Shuai Liu , Piaopiao Qiu , Anbin Wang , Peng Zhang , Keke Tang , Chensen Lin , Shuo Chen
{"title":"Image-based CNN-DPD model for critical diameter prediction in DLD devices","authors":"Shuai Liu , Piaopiao Qiu , Anbin Wang , Peng Zhang , Keke Tang , Chensen Lin , Shuo Chen","doi":"10.1016/j.seppur.2025.133459","DOIUrl":"10.1016/j.seppur.2025.133459","url":null,"abstract":"<div><div>Deterministic Lateral Displacement (DLD) is a microfluidic technology that separates particles based on size and deformability, with separation efficiency closely tied to the critical diameter. In recent years, machine learning (ML) has emerged as a powerful tool for predicting the critical diameter, offering a promising alternative to time-consuming simulations and experiments. However, traditional regression ML models relying on control parameters often struggle to achieve high prediction accuracy, particularly when dealing with asymmetric shapes, due to their limited ability to capture geometric intricacies. To overcome these constraints, an image-based method for predicting the critical diameter is proposed in present study, integrating Convolutional Neural Networks (CNN) with Dissipative Particle Dynamics (DPD). This CNN-DPD approach demonstrates superior prediction performance compared to conventional regression models and remains effective even when trained on small datasets. Specifically, it achieves the same prediction accuracy comparable to that of traditional models trained on 3000 samples, while requiring only 300 samples. Building upon this, a CNN-based framework for optimizing the DLD pillar shape is introduced. Using this framework, it is found that an asymmetric shape along the x-axis outperforms other configurations, and the mechanism by which it reduces the critical diameter – by modulating the peak shift of inter-pillar flow velocity – is elucidated through DPD simulations.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"374 ","pages":"Article 133459"},"PeriodicalIF":8.1,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133517","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}