Separation and Purification Technology最新文献_第10页

Biocompatible Cyclodextrin-based metal-organic frameworks for atmospheric water harvesting 用于大气水收集的生物相容性环糊精基金属有机框架

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-08 DOI: 10.1016/j.seppur.2026.137180

Jiabao Gui, Hui Kang, Lifei Yin, Shuo Yang, Meng Wang, Yang Chen, Jinping Li, Libo Li

Water scarcity in arid regions has become an urgent global challenge, highlighting the need for efficient freshwater production technologies. Sorption-based atmospheric water harvesting (SAWH) offers a promising approach, with its core relying on high-performance sorbents and practical device design. Among various candidates, metal-organic frameworks (MOFs) attracted considerable attention, but biocompatibility is essential for drinking water collection. This requirement motivates the investigation of cyclodextrin-based MOFs (CD-MOFs), which feature green synthesis, non-toxicity, and even digestibility. Herein, three CD-MOFs (α-CD-Na, β-CD-K, and γ-CD-K) were synthesized and systematically evaluated, revealing β-CD-K as the most promising SAWH sorbent. It exhibits an almost S-shaped water sorption isotherm, relatively high water uptake, robust structural stability, and the potential for scalable preparation. We further investigated its water adsorption mechanism and identified optimal operating conditions. Finally, a portable, sunlight-driven SAWH device was designed to harvest freshwater under real outdoor conditions. Under identical conditions, β-CD-K produced 12.5 mL of water, equal to 0.47 L·kg⁻¹ per day. This offers valuable insights for the design of portable water collection devices.

干旱地区的水资源短缺已成为一项紧迫的全球挑战，突出表明需要高效的淡水生产技术。基于吸附的大气水收集（SAWH）提供了一种很有前途的方法，其核心依赖于高性能吸附剂和实用的设备设计。在各种候选材料中，金属有机框架（mof）引起了相当大的关注，但生物相容性对饮用水收集至关重要。这一需求激发了环糊精基mof （cd - mof）的研究，其特点是绿色合成，无毒，甚至可消化。本文合成了三种cd - mof (α-CD-Na、β-CD-K和γ-CD-K)，并对其进行了系统评价，结果表明β-CD-K是最有前途的SAWH吸附剂。它表现出几乎s形的吸水等温线，相对较高的吸水性，坚固的结构稳定性，以及可扩展制备的潜力。进一步研究了其吸附机理，并确定了最佳操作条件。最后，设计了一种便携式，阳光驱动的SAWH设备，用于在真实的室外条件下收集淡水。在相同条件下，β-CD-K产生12.5 mL水，等于0.47 L·kg−1 /天。这为便携式集水装置的设计提供了有价值的见解。

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引用次数: 0

Synthesis of La-doped Mg-Al layered double oxide for selective tellurite adsorption 镧掺杂Mg-Al层状双氧化物的合成及其对碲的选择性吸附

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-07 DOI: 10.1016/j.seppur.2026.137186

Liang Jiang , Qiuyi Wang , Shuang Li , Dong Wang , Yaoyao Tang , Jiahao Luo , Jun Liao , Congcong Ding , Lielin Wang , Mei Tang , Xiaoan Li , Mingsong Shi

Polonium was a highly toxic and radioactive nuclide commonly detected in wastewater from spent fuel reprocessing and lead‑bismuth-cooled reactor systems, making its removal essential for nuclear safety. In this work, lanthanum-modified magnesium‑aluminum layered double oxide (La-MgAl-LDO) was prepared by doping La(III) in Mg-Al layered double oxide (Mg-Al-LDO). Additionally, tellurium, which has similar chemical properties, was used as a substitute for polonium to investigate the adsorption performance. Under the optimized conditions (pH = 6, m/V = 0.2 g/L, and C₀ = 20 mg/L), La-MgAl-LDO achieved a maximum removal efficiency of 99% for tellurite. The adsorption of Te(IV) onto La-MgAl-LDO followed the pseudo-second-order and Freundlich models, indicating that the adsorption process was characterized by multilayer chemical adsorption. The Te(IV) adsorption mechanisms mainly include co-precipitation and surface complexation. In addition, the study confirmed that La³⁺ reacted with Te(IV) to form a stable solid precipitate (La₂Te₆O₁₅), which played a crucial role in the removal of Te(IV) from aqueous solution.

钋是一种剧毒的放射性核素，通常在乏燃料后处理和铅铋冷却反应堆系统的废水中检测到，因此清除钋对核安全至关重要。本文通过在Mg-Al层状双氧化物（Mg-Al- ldo）中掺杂La（III）制备了镧修饰的镁铝层状双氧化物（La- mgal - ldo）。另外，用化学性质相似的碲代替钋，研究了其吸附性能。在最佳条件（pH = 6, m/V = 0.2 g/L, C0 = 20 mg/L）下，La-MgAl-LDO对碲的最大去除率为99%。Te（IV）在La-MgAl-LDO上的吸附符合拟二阶和Freundlich模型，表明吸附过程具有多层化学吸附的特征。Te（IV）的吸附机制主要有共沉淀和表面络合。此外，本研究还证实了La3+与Te（IV）反应形成稳定的固体沉淀（La2Te6O15），这对于Te（IV）在水溶液中的脱除起到了至关重要的作用。

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引用次数: 0

Electrochemical lithium extraction from alkaline brine using carbon-coated LiFePO4: degradation mechanism and stability enhancement 碳包覆LiFePO4从碱性盐水中电化学提锂：降解机理及稳定性增强

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-07 DOI: 10.1016/j.seppur.2026.137187

Haigang Huang , Dongfu Liu , Tianyu Zhao , Siqi Zhou , Wenhua Xu , Zhongwei Zhao

Electrochemical Deintercalation/Intercalation method is a highly efficient technique for extracting lithium from salt lake brines that has received significant attention. However, the stability of LiFePO₄ in alkaline solution limits its application in lithium extraction from carbonate-type salt lakes. In this work, the electrochemical behavior of LiFePO₄ in aqueous solution was analyzed, and the degradation mechanism of LiFePO₄ in alkaline brine was revealed. Based on this, the effects of carbon coatings on the lithium extraction performance of LiFePO₄ in alkaline brine were investigated. The results indicate that in alkaline brine, after 40 cycles, the capacity retention of LFP@C-3 showed an 18% enhancement compared to LFP@C-1. This study provides new insights for enhancing the electrochemical performance of LiFePO₄ in alkaline solutions, while also offering technical support for developing complex lithium resources in high-altitude regions.

电化学脱嵌/插层法是从盐湖卤水中提取锂的一种高效技术，受到了广泛的关注。但LiFePO4在碱性溶液中的稳定性限制了其在碳酸盐型盐湖提锂中的应用。研究了LiFePO4在水溶液中的电化学行为，揭示了LiFePO4在碱性盐水中的降解机理。在此基础上，研究了碳膜对LiFePO4在碱性盐水中提锂性能的影响。结果表明，在碱性盐水中，经过40次循环后，LFP@C-3的容量保持比LFP@C-1提高了18%。该研究为提高LiFePO4在碱性溶液中的电化学性能提供了新的见解，同时也为高海拔地区复杂锂资源的开发提供了技术支持。

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引用次数: 0

Accuracy and limitations of constant salt rejection assumption in brackish water RO membranes modeling: CFD and experimental validation 微咸水反渗透膜模型中恒盐抑制假设的准确性和局限性：CFD和实验验证

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-11 Epub Date: 2026-01-11 DOI: 10.1016/j.seppur.2026.136856

Mehrad Tajik, Alireza Hamidi, Alireza Jalali

Reverse osmosis (RO) is the leading desalination method due to its high removal efficiency and low energy demand. Numerical simulations are widely used to study RO processes; however, the complexity of membrane transport modeling has led many studies to treat salt rejection,

Rej

, as an intrinsic membrane property and to neglect membrane salt permeability. This study experimentally and numerically assessed that assumption for brackish water RO (BWRO) membranes using a bench-scale cross-flow test cell. Water and salt permeabilities, A and B, were determined and measurement uncertainty were quantified. A remained stable across operating conditions, while the apparent variability in B was statistically consistent with experimental uncertainty. Two numerical models were evaluated against the experimental data. Model 1 incorporates the full solution–diffusion mechanism for membrane transport, while Model 2 assumes

Rej

is an intrinsic membrane property. Both models predict water flux and concentration polarization accurately. However, for permeate concentration,

C_{p}

, Model 2 under constant

Rej

assumption showed large deviations, with a maximum error of 216.25% and an average error of 61.06%, while Model 1 with constant B assumption reduced these errors to 18.68% and 10.1%, respectively. Using the validated numerical model, a parametric study on three commercial membranes under various BWRO operating conditions shows that Rej is strongly influenced by membrane characteristics, feed salinity, and pressure. For each membrane,

Rej

increases with feed concentration and pressure. At practical operating conditions, the range of

Rej

variability is limited; however, even small deviations in

Rej

at high feed concentration substantially affect permeate concentration

C_{p}

.

反渗透（RO）因其去除效率高、能耗低而成为海水淡化的主要方法。数值模拟被广泛用于研究RO过程；然而，由于膜传输模型的复杂性，导致许多研究将盐排斥（RejRej）视为膜的固有特性，而忽略了膜盐的渗透性。本研究通过实验和数值方法对微咸水反渗透（BWRO）膜进行了验证。测定水和盐渗透率A和B，并量化测量不确定度。A在操作条件下保持稳定，而B的表观变异性在统计上与实验不确定性一致。根据实验数据对两种数值模型进行了评价。模型1包含了膜运输的完整溶液扩散机制，而模型2假设RejRej是一种固有的膜性质。两种模式都能准确预测水通量和浓度极化。然而，对于渗透浓度CpCp，模型2在恒定RejRej假设下的偏差较大，最大误差为216.25%，平均误差为61.06%，而模型1在恒定B假设下的误差分别减小到18.68%和10.1%。利用验证的数值模型，对三种不同BWRO操作条件下的工业膜进行了参数化研究，结果表明，Rej受膜特性、进料盐度和压力的影响很大。对于每个膜，RejRej随进料浓度和压力的增加而增加。在实际操作条件下，RejRej可变性的范围是有限的；然而，在高饲料浓度下，即使RejRej的微小偏差也会显著影响渗透浓度CpCp。

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引用次数: 0

Performance of MOF-containing active layer and HOF-based support layer of ultrafiltration membrane for nanoplastics removal from secondary effluent 含mof活性层和hof支撑层超滤膜去除二级出水纳米塑料的性能研究

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-11 Epub Date: 2026-01-23 DOI: 10.1016/j.seppur.2026.137023

Thuhin Kumar Dey, Linhua Fan, Muhammed Bhuiyan, Biplob Kumar Pramanik

Nanoplastics (NPs) are an emerging environmental contaminant of global concern due to their persistence and harmful effects on aquatic ecosystems. A novel dual-modified ultrafiltration membrane was developed for enhanced removal of NPs from secondary effluent collected from three wastewater treatment plants. The membrane was engineered with MIL-101(Cr), a metal-organic framework, in the active layer and a hydrogen-bonded organic framework derived from 4,4′,4″,4‴-(pyrene-1,3,6,8-tetrayltetrakis(ethyne-2,1-diyl))tetrabenzoic acid in the substrate layer. This study further identified and quantified the presence of three specific NPs in the collected effluent: poly(methyl methacrylate), polyethylene terephthalate, and polyvinyl chloride. Initial identification was performed using nanoparticle tracking analysis, and subsequently verified by using UV–Vis spectroscopy at specific absorbance peaks. Crossflow filtration tests showed excellent performance, achieving a permeability of ∼1550 Lm⁻²h⁻¹bar⁻¹ and 97% NPs removal. This high efficiency arose from synergistic mechanisms of size-exclusion sieving, electrostatic repulsion, and the formation of a robust hydration layer that limited foulant adhesion. The membrane also exhibited excellent antifouling behaviour, maintaining a 97% flux recovery ratio after ten filtration cycles, while no chromium leaching was observed within pH 4–10, and 500–1500 ppm of NaOCl solution. These findings demonstrate the potential of dual-modified membranes as robust, high-efficiency filtration systems for long-term NPs removal in wastewater treatment plants.

纳米塑料（NPs）是一种新兴的环境污染物，由于其持久性和对水生生态系统的有害影响而受到全球关注。研究了一种新型的双改性超滤膜，用于提高对三个污水处理厂二级出水NPs的去除效果。该膜的活性层采用金属有机骨架MIL-101(Cr)，底物层采用源自4,4′，4″，4′-（芘-1,3,6,8-四基四基（乙炔-2,1-二基））四苯甲酸的氢键有机骨架。本研究进一步确定并量化了收集的废水中存在的三种特定NPs：聚（甲基丙烯酸甲酯）、聚对苯二甲酸乙二醇酯和聚氯乙烯。通过纳米颗粒跟踪分析进行初步鉴定，随后通过特定吸光度峰的紫外可见光谱进行验证。横流过滤测试表现出优异的性能，渗透率达到~ 1550 Lm−2h−1bar−1，NPs去除率达到97%。这种高效率源于排粒筛分、静电斥力和形成强大的水化层的协同机制，水化层限制了污染物的粘附。膜还表现出优异的防污性能，在10次过滤循环后保持97%的通量回收率，而在pH 4-10和500-1500 ppm的NaOCl溶液中没有观察到铬浸出。这些发现证明了双改性膜作为污水处理厂长期去除NPs的强大、高效过滤系统的潜力。

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引用次数: 0

Modification of carbon nitride by pyrimidine incorporation and molten-salt crystallization engineering for efficient hydrogen peroxide production and antibiotic degradation 嘧啶掺入和熔盐结晶工程对氮化碳的改性，用于高效过氧化氢生产和抗生素降解

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-11 Epub Date: 2026-01-29 DOI: 10.1016/j.seppur.2026.137068

Yunhe Gong , Ting Su , Hongbin Yu , Xinhong Wang , Ying Lu , Weichao Qin

The photocatalytic water treatment technology has received widespread attention as an efficient and environmentally friendly approach for eliminating antibiotic pollutants in water environments. Polymeric carbon nitride (PCN) is a promising photocatalyst because of its good stability, low cost and facile synthesis. However, the intrinsic defects, such as slow carrier migration and fast recombination of electron-hole pairs, severely limit its practical applications. To improve these issues, a new modification strategy, namely pyrimidine incorporation and molten-salt crystallization engineering, was investigated to synthesize highly crystalline carbon nitride (Cry-TCN). Pyrimidine incorporation tailored the electronic structure by introducing π-conjugated asymmetry. Molten-salt crystallization promoted the formation of electron-withdrawing CN groups and improved structural ordering. The dipole moment of Cry-TCN was thus enhanced, facilitating charge carrier separation and electron transport. DFT calculations revealed that the structural evolution markedly strengthened O₂ adsorption and reduced the energy barrier for H₂O₂ generation. The H₂O₂ production rate by Cry-TCN reached as high as 706.98 μmol·L⁻¹·h⁻¹. The yields of H₂O₂, •O₂⁻, and ¹O₂ by Cry-TCN were 46.27, 5.23 and 6.50 times higher than those by pristine PCN, respectively. Abundant active species enabled Cry-TCN to degrade ciprofloxacin efficiently. Cry-TCN exhibited excellent stability and adaptability in complex water environments. The result of life cycle assessment highlighted the superior environmental friendliness of Cry-TCN throughout its life cycle compared with PCN. This study promotes the development of PCN-based photocatalysts and their application in the photocatalytic water treatment technology.

光催化水处理技术作为一种高效、环保的消除水环境中抗生素污染物的方法受到了广泛的关注。聚合物氮化碳（PCN）具有稳定性好、成本低、合成方便等优点，是一种很有前途的光催化剂。但其固有的载流子迁移慢、电子空穴对复合快等缺陷严重限制了其实际应用。为了改善这些问题，研究了一种新的改性策略，即嘧啶掺入和熔盐结晶工程，以合成高结晶性氮化碳（crry - tcn）。嘧啶的掺入通过引入π共轭不对称来调整电子结构。熔盐结晶促进了吸电子CN基团的形成，改善了结构的有序性。ry- tcn的偶极矩增强，有利于载流子分离和电子输运。DFT计算表明，结构演化显著增强了O2吸附，降低了H2O2生成的能垒。ry- tcn的H2O2产率高达706.98 μmol·L−1·h−1。crry - tcn的H2O2、•O2−和1O2的产率分别是原始PCN的46.27倍、5.23倍和6.50倍。丰富的活性物质使Cry-TCN能有效降解环丙沙星。Cry-TCN在复杂的水环境中表现出优异的稳定性和适应性。生命周期评价结果表明，与PCN相比，Cry-TCN在整个生命周期内都具有优越的环境友好性。本研究促进了聚丙烯腈基光催化剂的发展及其在光催化水处理技术中的应用。

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引用次数: 0

Machine learning–driven identification of key factors governing hormone adsorption by agrifood waste–derived adsorbents 机器学习驱动的农业食品垃圾吸附剂对激素吸附的关键因素识别

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-11 Epub Date: 2026-01-25 DOI: 10.1016/j.seppur.2026.137033

Masud Parvez , Ahasanul Karim , Zarifeh Raji , Isa Ebtehaj , Hossein Bonakdari , Seddik Khalloufi

Hormone contamination in aquatic systems threatens human health and ecosystems, demanding efficient and sustainable separation strategies. This study aims to develop a machine learning (ML) framework to predict hormone adsorption using agrifood waste-derived adsorbents and to identify the key variables governing adsorption efficiency. A dataset of 604 observations with nine input variables was compiled from peer-reviewed studies. Three ensemble ML algorithms—Random Forest (RF), Least Squares Boosting, and M5 model trees—were evaluated across 511 models generated from all combinations of one to nine input variables. RF demonstrated the highest predictive accuracy, achieving a maximum test coefficient of determination (R²) of 0.976 and a minimum mean absolute error of 4.26 using eight input variables. Model robustness was assessed using a Combined Index (CI) integrating six statistical metrics, which decreased from a median value of 0.78 for single-input models to 0.0006 for the optimal eight-input configuration; the full nine-input model yielded CI = 0.0019. Bayesian optimization using the Expected Improvement per Second acquisition function further improved model performance, producing the highest test Nash–Sutcliffe efficiency (0.951) and the lowest normalized root mean square error (0.162) and ratio of root mean square error to standard deviation (0.221). Feature importance analysis identified initial concentration, contact time, pH, and adsorbent-to-solution ratio as the most influential predictors of adsorption efficiency. Hormone-specific analyses for 17β-estradiol (318 data points) and 17α-ethinylestradiol (106 data points) confirmed the robustness of these findings. The results show that optimized ML models support the design of sustainable adsorption-based hormone removal systems.

水生系统中的激素污染威胁着人类健康和生态系统，需要有效和可持续的分离策略。本研究旨在开发一个机器学习（ML）框架，以预测使用农业食品垃圾衍生吸附剂的激素吸附，并确定控制吸附效率的关键变量。从同行评议的研究中编译了604个观察结果和9个输入变量的数据集。三种集成ML算法——随机森林（RF）、最小二乘增强和M5模型树——在511个模型中进行了评估，这些模型是由1到9个输入变量的所有组合生成的。RF具有最高的预测精度，8个输入变量的最大检验决定系数（R2）为0.976，最小平均绝对误差为4.26。模型稳健性评估采用综合六个统计指标的综合指数（CI），从单输入模型的中位数0.78下降到最佳八输入配置的0.0006；完整的9个输入模型的CI = 0.0019。贝叶斯优化利用每秒预期改进（Expected Improvement per Second）获取函数进一步提高了模型的性能，产生最高的检验Nash-Sutcliffe效率（0.951），最低的归一化均方根误差（0.162）和均方根误差与标准差之比（0.221）。特征重要性分析表明，初始浓度、接触时间、pH值和吸附剂与溶液的比例是影响吸附效率的最重要因素。对17β-雌二醇（318个数据点）和17α-炔雌醇（106个数据点）的激素特异性分析证实了这些发现的稳健性。结果表明，优化的ML模型支持基于可持续吸附的激素去除系统的设计。

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引用次数: 0

Boosted performance of peroxymonosulfate-based Fenton-like reactions by employing CoMn2O4 encapsulated in carbon matrix as catalyst 以碳基包封的CoMn2O4为催化剂，提高了过氧单硫酸盐类芬顿反应的性能

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-11 Epub Date: 2026-01-28 DOI: 10.1016/j.seppur.2026.137027

Rui Yang , Yizhou Feng , Yunan Song , Xianshu Zhou , Weihuang Zhu

Carbon matrix-encapsulated CoMn₂O₄ composite was prepared as an effectively peroxymonosulfate (PMS) activator. The prepared catalyst (2.0-C/CMO-700) achieved nearly 100% pollutant removal within 30 min in PMS-based Fenton-like reactions. The high catalytic performance and stability of 2.0-C/CMO-700 were attributed to the encapsulated reactive CoMn₂O₄ within the carbon matrix, low charge transfer resistance (R_ct) and enhanced redox transformation among different valence states of Mn and Co. Consequently, when 2.0-C/CMO-700 functioned as an electron electron-pool, efficient charge transfer to PMS or the target pollutant (TC) was promoted, resulting in high PMS activation efficiency toward pollutant removal. Quenching experiments showed the generated reactive species, including SO₄^⋅-, O₂^⋅-, ¹O₂ and OH^⋅, participated in the radical and non-radical pathways and played critical roles in pollutant degradation. Furthermore, the oxygen molecule actively contributed to the formation of reactive oxygen species (O₂^⋅- and ¹O₂), which was driven by the catalytic effect of 2.0-C/CMO-700. The presences of SO₄^⋅- and O₂^⋅- further enhanced the yield of ¹O₂ during PMS activation process. Density functional theory (DFT) calculations showed that the adsorption energy (E_ads) of PMS on the surfaces of catalyst, as well as the OO bond length (l_O–O) and OS bond length (l_O–S) in the adsorbed PMS molecule were all strengthened, which thereby facilitating more efficient generation of reactive oxygen species during PMS activation. This study proposed a green, sustainable approach for producing highly efficient and durable metal‑carbon composites to support environmental remediation.

制备了碳基包封的CoMn2O4复合材料作为一种有效的过氧单硫酸盐（PMS）活化剂。所制备的催化剂（2.0-C/CMO-700）在pms基Fenton-like反应中在30 min内实现了近100%的污染物去除率。2.0-C/CMO-700具有较高的催化性能和稳定性，主要归功于碳基体内包封活性CoMn2O4、低电荷转移电阻（Rct）和增强Mn和Co在不同价态之间的氧化还原转化。因此，当2.0-C/CMO-700作为电子电子池时，促进了PMS或目标污染物（TC）的有效电荷转移，从而提高了PMS对污染物去除的激活效率。猝灭实验表明，所生成的SO4⋅-、O2⋅-、1O2和OH⋅等反应物质参与了自由基和非自由基途径，在污染物降解中发挥了关键作用。此外，在2.0-C/CMO-700的催化作用下，氧分子积极促进活性氧O2⋅-和1O2的形成。SO4⋅-和O2⋅-的存在进一步提高了PMS活化过程中1O2的产率。密度泛函理论（DFT）计算表明，PMS在催化剂表面的吸附能（Eads）以及被吸附的PMS分子的OO键长（lO-O）和OS键长（lO-S）都得到了增强，从而有利于PMS活化过程中更有效地生成活性氧。本研究提出了一种绿色、可持续的方法来生产高效、耐用的金属碳复合材料，以支持环境修复。

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引用次数: 0

Activating the photocatalytic potential of insulator hydroxyapatite via oxygen vacancies and dual Schottky junctions for NIR-I/II synergistic water disinfection and purification 通过氧空位和双肖特基结激活绝缘体羟基磷灰石的光催化电位，用于NIR-I/II协同水消毒和净化

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-11 Epub Date: 2026-01-31 DOI: 10.1016/j.seppur.2026.137103

Caizhi Lv , Hui Xin , Hongbing Liao , Lan Wu , Xiandeng Hou

The transformation of natural insulators into near-infrared (NIR)-responsive photocatalysts presented a fundamental challenge for sustainable water disinfection technologies. Herein, we demonstrated the activation of the insulator hydroxyapatite (HAp) through a synergistic strategy involving oxygen vacancies (OVs) and dual Schottky junctions. This approach extended the light absorption of the designed Ti₃C₂Tₓ/OV-HAp/graphitic carbon (T6HG) heterojunction to 1280 nm (NIR-II) and established dual directional charge-transfer channels, significantly enhancing carrier separation, as was evidenced by both experimental and theoretical analyses. As a result, the T6HG achieved exceptional disinfection efficacy, inactivating 99.92% (>3.08-log) and 93.94% (>1.22-log) of S. aureus under 808 nm and 1050 nm irradiation, respectively. The mechanism involved a virtuous cycle: Localized photothermal heating disrupted bacterial membranes, facilitated the infiltration of reactive oxygen species generated via Schottky-junction-driven electron transfer, culminated in lethal oxidative damage. This study provided proof of concept for activating inert minerals and demonstrated their robust antibacterial efficacy in both simulated interfering environments and authentic water matrices, highlighting their potential for practical solar-driven water purification

将天然绝缘体转化为近红外（NIR）响应光催化剂对可持续水消毒技术提出了根本性的挑战。在此，我们证明了绝缘体羟基磷灰石（HAp）通过涉及氧空位（OVs）和双肖特基结的协同策略激活。实验和理论分析表明，该方法将Ti₃C₂Tₓ/OV-HAp/石墨碳（T6HG）异质结的光吸收扩展到1280 nm (NIR-II)，并建立了双向电荷转移通道，显著提高了载流子分离。结果表明，在808 nm和1050 nm辐照下，T6HG对金黄色葡萄球菌的灭活率分别为99.92% （>3.08-log）和93.94% （>1.22-log）。其机制涉及一个良性循环：局部光热加热破坏细菌膜，促进通过肖特基结驱动的电子转移产生的活性氧的渗透，最终导致致命的氧化损伤。这项研究为激活惰性矿物提供了概念证明，并证明了它们在模拟干扰环境和真实水基质中的强大抗菌功效，突出了它们在实际太阳能驱动的水净化方面的潜力

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引用次数: 0

Influence of fiber microstructure on particle dynamic deposition and macroscopic filtration performance in nonwoven fiber filter media 纤维微观结构对非织造纤维过滤介质中颗粒动态沉积及宏观过滤性能的影响

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-11 Epub Date: 2026-02-03 DOI: 10.1016/j.seppur.2026.137143

Hao Jin , Chenxuan Wang , Gangcheng Peng , Jiahua Chai , Qiang Zhang , Zhenyu Wu , Xiaoyu Zhu , Xuegang Wang , Changgeng Gui , Fan Geng , Shihang Li

Multilayer nonwoven fiber filter media are critical components in separation and purification processes for efficient fine particulate matter removal from airflow. However, there is a lack of in-depth understanding of how fiber microstructure dictates the dynamic evolution of particle deposition and, consequently, the macroscopic filtration performance. Understanding this mechanism is important for designing a new generation of filters characterized by high efficiency, low pressure drop, and prolonged lifespan. This paper investigates the influence of key structural parameters of fiber filter media, such as fiber packing density and fiber diameter, on particle deposition characteristics using the Discrete Element Method-Computational Fluid Dynamics (DEM-CFD) coupling simulation method. The results indicate that the timing of the dynamic transition from deep filtration to surface filtration of the filter media is regulated by the fiber microstructural parameters. Specifically, increasing fiber packing density or decreasing fiber diameter can improve filtration efficiency, but it lead to the concentration of deposited particles in the shallow filter media, resulting in a rapid increase in pressure drop and a decrease in quality factor. Conversely, reduced packing density and increased fiber diameters can facilitate particles penetrating deep into the filter media and achieving uniform deposition, thereby maintaining high filtration efficiency while delaying the increase in pressure drop and enhancing the quality factor, and extending the purification unit's service life. The research outcomes can offer theoretical guidance for the rational design, structural optimization, and performance enhancement of advanced nonwoven filter media.

多层非织造纤维过滤介质是分离和净化过程中有效去除气流中细颗粒物的关键部件。然而，人们对纤维微观结构如何决定颗粒沉积的动态演变以及宏观过滤性能缺乏深入的了解。了解这一机制对于设计新一代过滤器具有高效率、低压降和长寿命的特点非常重要。本文采用离散元法-计算流体力学（DEM-CFD）耦合模拟方法，研究了纤维滤料关键结构参数如纤维堆积密度和纤维直径对颗粒沉积特性的影响。结果表明，过滤介质从深层过滤到表面过滤的动态过渡时间受纤维微观结构参数的调控。具体而言，增大纤维堆积密度或减小纤维直径可以提高过滤效率，但会导致沉积颗粒在浅层过滤介质中的浓度增加，导致压降迅速增大，质量因子降低。反之，降低填料密度，增加纤维直径，有利于颗粒深入过滤介质，达到均匀沉积，从而保持较高的过滤效率，同时延缓压降的增大，提高质量系数，延长净化装置的使用寿命。研究成果可为先进无纺布滤料的合理设计、结构优化和性能提升提供理论指导。

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