Separation and Purification Technology最新文献_第10页

GREEN extraction of antioxidant carotenoids from fresh ORANGE PEEL USING CO₂-expanded ethanol 用二氧化碳膨胀乙醇从新鲜橘子皮中提取抗氧化类胡萝卜素

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-08 DOI: 10.1016/j.seppur.2026.136808

Merichel Plaza , María Luisa Marina

Carotenoids are valuable bioactive pigments widely used in the food, pharmaceutical, and cosmetic industries due to their potent antioxidant properties. The growing demand for sustainable extraction processes has driven interest in valorizing agro-industrial by-products, such as orange peel, which is particularly rich in carotenoids. Traditional extraction methods typically rely on toxic organic solvents and energy-intensive procedures, raising environmental and safety concerns. In this study, a green and efficient method based on CO₂-expanded ethanol (CXE) was developed for the extraction of antioxidant carotenoids from fresh orange peel waste. To the best of our knowledge, this is the first report exploring CXE for carotenoid recovery from citrus by-products. A theoretical evaluation using Hansen solubility parameters (HSP) was conducted to predict the solubility behaviour of key carotenoids in CXE, guiding the selection of optimal solvent compositions. A D-optimal response surface design was employed to optimize key extraction parameters, including CO₂ molar fraction, temperature, pressure, and solvent flow rate. The optimized CXE process (57.6 °C, 6.3 MPa, 1 mL/min, and 50% v/v CO₂ in ethanol) achieved significantly higher carotenoid yields and antioxidant capacities (ABTS and DPPH assays) than conventional solid-liquid extraction using acetone, hexane, or ethanol. Notably, the CXE method enabled direct extraction from fresh peel, circumventing the need for a drying step and thereby preserving thermolabile compounds and reducing energy consumption. These results confirm the potential of CXE as a scalable and sustainable alternative for the recovery of high-value compounds from citrus waste, aligning with green chemistry principles and circular economy strategies.

类胡萝卜素是一种有价值的生物活性色素，由于其有效的抗氧化特性，被广泛应用于食品、制药和化妆品行业。对可持续提取工艺的需求不断增长，推动了对农业工业副产品的兴趣，如橘子皮，其中特别富含类胡萝卜素。传统的提取方法通常依赖于有毒的有机溶剂和能源密集型的过程，引起了环境和安全问题。研究了一种绿色高效的以CO₂膨胀乙醇（CXE）为原料提取新鲜橘皮废弃物中抗氧化类胡萝卜素的方法。据我们所知，这是探索柑橘副产品中类胡萝卜素的CXE回收的第一份报告。利用汉森溶解度参数（Hansen soluble parameters， HSP）进行理论评价，预测了关键类胡萝卜素在CXE中的溶解度行为，指导了最佳溶剂组成的选择。采用d -最优响应面设计，对co2摩尔分数、温度、压力、溶剂流速等关键提取参数进行优化。优化后的CXE工艺（57.6°C, 6.3 MPa, 1 mL/min， 50% v/v CO₂在乙醇中）比传统的丙酮、己烷或乙醇固液萃取法获得了更高的类胡萝卜素产量和抗氧化能力（ABTS和DPPH检测）。值得注意的是，CXE方法可以直接从新鲜果皮中提取，避免了干燥步骤的需要，从而保存了耐热性化合物并降低了能耗。这些结果证实了CXE作为从柑橘废弃物中回收高价值化合物的可扩展和可持续替代方案的潜力，符合绿色化学原则和循环经济战略。

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引用次数: 0

Efficient and selective catalytic hydrogenation of nitroarenes catalyzed by two-dimensional Ni@Cu-MOF bimetallic nanosheets 二维Ni@Cu-MOF双金属纳米片催化硝基芳烃高效选择性加氢

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-08 DOI: 10.1016/j.seppur.2026.136830

Yu-Xuan Zhang , Yi-Jie Ma , Hai-Ming Fei , Feng Zhang , Li-Juan Lan , Cai-Xia Yu , Xiao-Qiang Li , Lei-Lei Liu

Development of efficient non-noble metal catalysts for the chemoselective hydrogenation of nitroarenes under mild conditions remains a significant challenge. In this study, we harnessed the unique and distinctive merits of two-dimensional (2D) metal-organic frameworks (MOFs) to synthesize an ultrathin 2D Ni@Cu-MOF bimetallic system. By using the mild reducing agent NaBH₄, the 2D bimetallic catalyst achieved exceptional catalytic performance in the hydrogenation of 4-chloronitrobenzene, with nearly full conversion (99.9%) and outstanding selectivity (99.4%) at room temperature. Systematic experimental investigations further revealed the highly efficient catalytic performance of the catalyst in the hydrogenation for a broad substrate scope, including diverse nitroarenes with varying electronic properties and steric hindrance. The excellent catalytic activity of the 2D Ni@Cu-MOF bimetallic catalyst can be stemmed from its unique structural attributes. The bimetallic Ni-Cu system synergistically enhanced selectivity while preserving reactivity, achieving a balanced activity-chemoselectivity for nitroarene hydrogenation. Maximizing dispersed catalytic site utilization via atomic dispersion and optimized spatial arrangement in 2D MOFs significantly amplified the catalytic efficiency, ensuring rapid, selective catalysis under mild conditions. Moreover, the unique cavity structure on the Ni@Cu-MOF nanosheets provided a well-confined microenvironment, which not only stabilized the metal ions against aggregation but also created a tailored microenvironment that intensifies substrate-active site interactions, thereby enhancing reaction selectivity. The catalytic mechanism underwent in-depth investigation through techniques including Fourier transform infrared analysis, X-ray photoelectron spectroscopy, and theoretical calculations. These studies demonstrated that the interactions between metal active sites and substrate molecules within the cavities of MOF nanosheets contributed significantly to the catalytic hydrogenation.

开发在温和条件下用于硝基芳烃化学选择性加氢的高效非贵金属催化剂仍然是一个重大挑战。在这项研究中，我们利用二维（2D）金属有机框架（mof）的独特和独特的优点来合成超薄二维Ni@Cu-MOF双金属体系。采用温和还原剂NaBH4，二维双金属催化剂对4-氯硝基苯加氢反应具有优异的催化性能，室温下转化率接近100%(99.9%)，选择性优异（99.4%）。系统的实验研究进一步揭示了该催化剂在广泛的底物范围内的高效催化加氢性能，包括具有不同电子性质和位阻的多种硝基芳烃。二维Ni@Cu-MOF双金属催化剂的优异催化活性源于其独特的结构属性。双金属Ni-Cu体系在保持反应活性的同时协同增强了选择性，实现了硝基芳烃加氢的活性-化学选择性平衡。通过原子分散和优化二维mof的空间排列，最大化分散的催化位点利用，显著提高了催化效率，确保了在温和条件下的快速、选择性催化。此外，Ni@Cu-MOF纳米片上独特的空腔结构提供了一个良好的微环境，不仅稳定了金属离子的聚集，而且创造了一个定制的微环境，加强了底物-活性位点的相互作用，从而提高了反应的选择性。通过傅立叶变换红外分析、x射线光电子能谱和理论计算等技术对催化机理进行了深入研究。这些研究表明，MOF纳米片腔内金属活性位点与底物分子之间的相互作用对催化加氢有重要作用。

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引用次数: 0

Preparation of 5 N-grade high-purity tellurium via fractional vacuum distillation with mechanism of deep impurity removal 分级真空精馏深度除杂工艺制备5n级高纯碲

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-08 DOI: 10.1016/j.seppur.2026.136838

Chaosong Meng , Xuan Cui , Jinxi Qiao , Zhipeng Xu , Qinghua Tian , Xueyi Guo

High-purity tellurium is an indispensable key material in semiconductor materials, new energy devices, and communications. This study employed fractional vacuum distillation to prepare 5 N-grade high-purity tellurium and proposes a technical route of “suppressing entrainment, segmented temperature control, and low-temperature selective volatilization” to deeply elucidate the migration behavior of tellurium and impurities. Single-stage vacuum distillation effectively removes low-volatility impurities such as Al, Fe, Ag, and Ni, achieving a total impurity removal rate of 69.15–78.04% and elevating tellurium purity from 99.9978% to 99.9995%, yet shows poor removal of medium- and high-volatility impurities including Bi, Se, Ca, Na, and Zn and even causes impurity enrichment. Two-stage vacuum distillation markedly lowers the content of these medium- and high-volatility impurities through selective volatilization, raising tellurium purity to 99.9998% with a total impurity removal rate of 91.16–93.49% and a direct yield of 93.51–94.84%. The study further indicates that tellurium exhibits two microscopic morphologies (smooth plate-like and raised granular) that depend on the temperature zone. This work demonstrates an environmentally sustainable and efficient strategy for high-purity tellurium preparation and offers valuable insights and practical implications for industrial applications.

高纯度碲是半导体材料、新能源器件、通信等领域不可缺少的关键材料。本研究采用分馏真空蒸馏法制备5n级高纯碲，提出了“抑制夹带、分段控温、低温选择性挥发”的技术路线，深入阐明了碲与杂质的迁移行为。单级真空蒸馏能有效去除Al、Fe、Ag、Ni等低挥发性杂质，总杂质去除率达到69.15 ~ 78.04%，将碲纯度从99.9978%提高到99.9995%，但对Bi、Se、Ca、Na、Zn等中、高挥发性杂质去除率较差，甚至会导致杂质富集。两级真空蒸馏通过选择性挥发，显著降低了中挥发性和高挥发性杂质的含量，将碲纯度提高到99.9998%，总杂质去除率为91.16 ~ 93.49%，直接收率为93.51 ~ 94.84%。研究进一步表明，碲在不同的温度区表现出两种微观形态（光滑的片状和凸起的颗粒状）。本研究为高纯度碲的制备提供了一种环境可持续和高效的策略，为工业应用提供了有价值的见解和实际意义。

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引用次数: 0

A dual-functional electrochemical system for versatile uranium recovery from acidic and organic-rich wastewaters 从酸性和富有机废水中回收铀的双功能电化学系统

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-08 DOI: 10.1016/j.seppur.2026.136843

Jiaqi Chen , Jianzhang Gao , Yu Liu , Huitao Lv , Yongde Yan , Fuqiu Ma , Yun Xue , Xiangbiao Yin

Conventional methods struggle to treat two different types of nuclear wastewater (highly acidic and organic-rich uranium streams) within a single system. To address this, we developed an electro-synergy uranium recovery (ESUR) system that adaptively treats both wastewater types without reconfiguration. The ESUR system achieved high uranium removal from real and simulated wastewaters. At pH = 1.0, stirring improved removal rates by up to 4.98-fold (1 V) and 14.94-fold (4 V), while adding NaCl boosted efficiency to 99.9% within 1 h, which was 3.4-fold higher than without additives. And the uranium content was reduced below 30 μg/L within 3 h, meeting WHO standards. In real wastewater (pH ≈ 0.5), uranium removal efficiency reached 98%. The ESUR system also maintained over 90% uranium removal in simulated wastewater with organics (TBP, EDTA, HA, urea, PVA, THFA) and over 96% in real uranium-containing wastewater with high levels of organics and ammonia nitrogen. The characterization results demonstrate that uranium recovery from highly acidic wastewater was achieved via the synergistic coupling of three integrated processes in ESUR system. This work breaks from single-function electrochemical treatment paradigms, offering a versatile and efficient platform for managing diverse uranium-containing wastewaters and promoting sustainable uranium recovery.

传统方法很难在一个系统内处理两种不同类型的核废水（高酸性和富有机铀流）。为了解决这个问题，我们开发了一种电协同铀回收（ESUR）系统，该系统可以自适应地处理两种废水类型，而无需重新配置。ESUR系统从真实和模拟废水中实现了高铀去除。在pH = 1.0时，搅拌可分别提高4.98倍（1 V）和14.94倍（4 V）的去除率，加入NaCl可在1 h内将去除率提高到99.9%，比未添加添加剂时提高3.4倍。3 h内铀含量降至30 μg/L以下，符合WHO标准。在实际废水（pH≈0.5）中，铀的去除率可达98%。ESUR系统在含有机物（TBP、EDTA、HA、尿素、PVA、THFA）的模拟废水中也保持了90%以上的铀去除率，在含高浓度有机物和氨氮的含铀废水中也保持了96%以上的铀去除率。表征结果表明，通过ESUR系统中三个集成过程的协同耦合，可以实现高酸性废水中铀的回收。这项工作打破了单一功能的电化学处理范式，为管理多种含铀废水和促进可持续铀回收提供了一个多功能和高效的平台。

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引用次数: 0

From prediction to synthesis: A combined machine learning and density functional theory approach for designing high-performance biochar and decoding codeine adsorption 从预测到合成：结合机器学习和密度功能理论设计高性能生物炭和解码可待因吸附的方法

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-08 DOI: 10.1016/j.seppur.2026.136840

Mao Ye , Shurui Cao , Jie Tian , Hongtao Su , Yao Tang , Zhiqiong Chen

A significant challenge in the rational design of biochar as an adsorbent for organic pollutants lies in the accurate prediction of adsorption performance. Machine learning (ML) offered a data-driven solution to identify key biochar parameters and underlying adsorption mechanism that are difficult to capture using conventional methods. This study combined ML with density functional theory (DFT) calculations fully decoded the adsorption process of codeine onto deep eutectic solvent (DES) modified biochar. Results demonstrated that XGBoost model showed the highest prediction performance with R² of 0.9237, RMSE of 0.3002, and MAE of 0.2222. SHAP and PDPs identified total pore volume (V_total) and specific surface area (S_BET), and N content as key material properties. In detail, V_total integrated the molecular accommodation and transference of different pores ranges, and S_BET modulated the abundance of active sites. N content regulated the quantity of N-containing functional groups (e.g., -NH₂, -NH₃⁺) on the biochar, thereby facilitating chemical interactions such as hydrogen bonding and electrostatic attraction. Guided by ML insights, a high-performance DES-doped biochar was successfully synthesized, achieving a notable codeine uptake capacity of 2659.69 μg/g. Kinetics and isotherm studies indicated hybrid physico-chemical adsorption process, while thermodynamics confirmed spontaneity and endothermicity. DFT calculations revealed MEA-based DES had the best adsorption performance with a stronger binding energy (−18.8 Kcal/mol), a lowest ∆E_gap (3.367 eV), and expanded negative electrostatic potential regions, due to the dual hydrogen bonding effect. This work demonstrated a data-enhanced strategy for developing functional biochar and elucidating contaminant removal mechanisms through an integrated ML–DFT framework.

合理设计生物炭作为有机污染物吸附剂的一个重大挑战在于准确预测其吸附性能。机器学习（ML）提供了一种数据驱动的解决方案，用于识别传统方法难以捕获的关键生物炭参数和潜在的吸附机制。本研究结合ML和密度泛函理论（DFT）计算，全面解析了可待因在深度共晶溶剂（DES）改性生物炭上的吸附过程。结果表明，XGBoost模型预测效果最佳，R2为0.9237，RMSE为0.3002，MAE为0.2222。SHAP和pdp将总孔隙体积（Vtotal）、比表面积（SBET）和N含量确定为材料的关键性能。Vtotal综合了不同孔隙范围的分子调节和转移，SBET调节了活性位点的丰度。N的含量调节了生物炭上含N的官能团（例如-NH₂，-NH₃+）的数量，从而促进了氢键和静电吸引等化学相互作用。在ML的指导下，成功合成了高性能的des掺杂生物炭，其可待因吸收量达到2659.69 μg/g。动力学和等温线研究表明吸附过程为物理-化学混合吸附过程，而热力学研究证实了吸附的自发性和吸热性。DFT计算结果表明，由于双氢键效应，mea基DES具有较强的结合能（- 18.8 Kcal/mol）、最低的∆Egap （3.367 eV）和较大的负静电势区，具有较好的吸附性能。这项工作展示了通过集成ML-DFT框架开发功能性生物炭和阐明污染物去除机制的数据增强策略。

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引用次数: 0

Advancement in 3D printing of polymer membranes: A breakthrough in sustainable membrane applications focusing on oil-water treatment 聚合物膜的3D打印进展：可持续膜应用的突破，重点是油水处理

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-08 DOI: 10.1016/j.seppur.2026.136837

Rayane Akoumeh , Eya Kacem , Khadija Zadeh , Abhishek Saji Kumar , Mukkarram Zubair , Deepalekshmi Ponnamma , Sui Yang , Kenan Song , Mohammad K. Hassan , Alaa H. Hawari , Maryam Al-Ejji

The accidental release of petroleum products into environments remains a pressing global challenge, posing a significant threat to both ecosystems and human health. While membranes have long been recognized as an efficient solution, conventional fabrication methods often rely on solvents and rigid designs, which limit their performance. Additive manufacturing (AM) is emerging as a transformative platform for addressing these issues by enabling solvent-free, design-flexible, and functionally customized membranes. In this review, we systematically explore the potential of additive manufacturing for creating membranes used explicitly for oil–water separation. We discuss how printing resolution, ink formulation, and process parameters directly affect membrane porosity, wettability, and separation efficiency. Importantly, our review demonstrates that 3D printing also offers a pathway toward scalable, customizable, and environmentally sustainable production. By outlining both achievements and limitations, this review provides a clear context that guides future research, leveraging the unique design flexibility of 3D printing to overcome the limitations of conventional membrane fabrication.

石油产品意外释放到环境中仍然是一个紧迫的全球挑战，对生态系统和人类健康构成重大威胁。虽然膜长期以来被认为是一种有效的解决方案，但传统的制造方法往往依赖于溶剂和刚性设计，这限制了它们的性能。增材制造（AM）正在成为一个变革性的平台，通过实现无溶剂、设计灵活和功能定制的膜来解决这些问题。在这篇综述中，我们系统地探讨了增材制造用于油水分离的膜的潜力。我们讨论了印刷分辨率、油墨配方和工艺参数如何直接影响膜的孔隙度、润湿性和分离效率。重要的是，我们的研究表明，3D打印也为可扩展、可定制和环境可持续的生产提供了一条途径。通过概述成就和局限性，本综述为指导未来的研究提供了明确的背景，利用3D打印独特的设计灵活性来克服传统膜制造的局限性。

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引用次数: 0

Synergistic catalysis in Mn2Co3/MCM-41: Electronic structure remodeling of Co and Mn sites for high-performance catalytic combustion of ethyl acetate Mn2Co3/MCM-41的协同催化：Co和Mn位点的电子结构重塑对乙酸乙酯的高性能催化燃烧

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.seppur.2026.136821

Ling Ding , Haopeng Tang , Jinhui Li , Juan Liang , Ningjie Fang , Yinghao Chu

Utilizing the unique synergistic catalytic effects of bimetallic catalysts for the efficient catalytic combustion of ethyl acetate (EA) represents a highly promising strategy for controlling volatile organic compounds (VOCs). In this research, we successfully prepared a series of catalysts featuring highly dispersed bimetallic nanoheterostructures constructed on MCM-41 mesoporous frameworks. Experimental characterization demonstrated that Mn2Co3/MCM-41 exhibits outstanding deep oxidation performance for EA (T₉₀ = 206.5 °C). Research reveals that the enhancement of bimetallic catalytic performance stems from Mn atoms triggering the local electronic remodeling of Co active sites. Mn acts as an electron extractor, facilitating electron transfer from Co to Mn and resulting in electron-deficient Co sites. This remodeling electronic structure exhibits exceptional adsorption with the H species at negative potential regions through extremely strong electrostatic attraction, which represents an adsorption mechanism based on electrostatic coupling. This study not only developed a high-performance EA catalytic combustion catalyst but also elucidated the enhanced mechanism mediated by electron transfer at the atomic scale. It provides crucial theoretical foundations and practical guidance for rationally designing highly efficient bimetallic VOC elimination catalysts.

利用双金属催化剂独特的协同催化效应对乙酸乙酯（EA）进行高效催化燃烧，是控制挥发性有机化合物（VOCs）的一种极具前景的策略。在本研究中，我们成功制备了一系列基于MCM-41介孔骨架的高分散双金属纳米异质结构催化剂。实验表征表明，Mn2Co3/MCM-41具有良好的EA深度氧化性能（T90 = 206.5℃）。研究表明，双金属催化性能的增强源于Mn原子触发Co活性位点的局部电子重塑。Mn充当电子萃取剂，促进电子从Co转移到Mn，并导致缺电子的Co位点。这种重塑的电子结构通过极强的静电吸引，在负电位区表现出对H种的特殊吸附，这代表了一种基于静电耦合的吸附机制。本研究不仅开发了一种高性能的EA催化燃烧催化剂，而且在原子尺度上阐明了电子转移介导的增强机理。为合理设计高效的双金属VOC消除催化剂提供了重要的理论依据和实践指导。

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引用次数: 0

Structural engineering of ZIF-8/COFs heterogeneous interface for synergistic adsorption and exciton-boosting ROS production to remove phenolic pollutants in wastewater ZIF-8/COFs非均相界面协同吸附及激子促ROS生成去除废水中酚类污染物的结构工程

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.seppur.2026.136820

Xinyue Huang , Junwei Yuan , Lijun Zhu , Chenfan Xie , Hua Li , Jianmei Lu

The integration of adsorption and photocatalysis shows great potential for efficiently removing phenolic pollutants from wastewater. However, current materials suffer from slow adsorption kinetics, limited capacity, and low efficiency in exciton-induced ROS generation, restricting industrial application. To address these limitations, we develop a ZIF-8@COFs nanocomposite through precise heterointerface engineering between ZIF-8 and TPBTTA. The TPBTTA framework, with abundant triazine units and high surface area, enables rapid pollutant adsorption via hydrogen bonding and π–π stacking. ZIF-8 enhances pore volume, exposing more active sites on TPBTTA. Moreover, the matched band structure between ZIF-8 and TPBTTA promotes electron transfer, improves charge separation, and boosts photocatalytic performance. The engineered heterointerface also enhances ROS generation through exciton activation. As a result, 40% ZIF-8/TPBTTA adsorbs 69% of bisphenol A (BPA) within 5 min and completely degrades it within 15 min via multiple ROS pathways—outperforming most reported adsorption-photocatalytic materials. Its strong structural and chemical stability further ensures long-term use in complex environments. These findings underscore the importance of precise structural design in developing efficient photocatalytic systems for wastewater treatment.

吸附与光催化相结合在高效去除废水中酚类污染物方面显示出巨大的潜力。然而，目前的材料在激子诱导的ROS生成中存在吸附动力学慢、容量有限、效率低等问题，限制了工业应用。为了解决这些限制，我们通过精确的异质界面工程在ZIF-8和TPBTTA之间开发了ZIF-8@COFs纳米复合材料。TPBTTA框架具有丰富的三嗪单元和高表面积，可以通过氢键和π -π堆积快速吸附污染物。ZIF-8增加了孔隙体积，使TPBTTA上暴露出更多的活性位点。此外，ZIF-8与TPBTTA之间的匹配带结构促进了电子转移，改善了电荷分离，提高了光催化性能。工程异质界面还通过激子激活增强ROS的产生。结果，40%的ZIF-8/TPBTTA在5分钟内吸附69%的双酚a (BPA)，并在15分钟内通过多种ROS途径完全降解，优于大多数报道的吸附光催化材料。其强大的结构和化学稳定性进一步确保了在复杂环境中的长期使用。这些发现强调了精确的结构设计在开发高效的光催化废水处理系统中的重要性。

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引用次数: 0

Comprehensive review of molecular oxygen activation technology: strategies, organic pollutants removal and other innovative applications 综述了分子氧活化技术：策略、有机污染物去除及其他创新应用

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.seppur.2026.136776

Tushan Zhong , Yue Fu , Yingyi Chen , Qin Wang , Yunqiang Yi , Weirui Chen , Yu Wang , Zenghui Diao , Zhenguo Chen

The accumulation of organic pollutants in environmental media has increasingly posed severe threats to both the ecological environment and human health, making the effective removal of these toxic contaminants critical. Recently, compared with other advanced oxidation technologies, molecular oxygen activation technology has become an ideal choice for degrading organic pollutants due to its green and low-cost advantages. In this review, the strategies and mechanisms underlying reactive oxygen species (ROS) generation via molecular oxygen activation by diverse environmental functional materials were summarized. Specifically, the removal efficiency and mechanisms of this technology for toxic organic pollutants in water were analyzed, revealing that deep mineralization of organic pollutants in water was attributed to ROS selectively attacking electron-rich sites and key functional groups of pollutants. Additionally, the efficacy and mechanisms for eliminating organic pollutants from soil were detailed, with OH, O₂⁻, and ¹O₂ identified as the key active species responsible for the degradation of organic contaminants. Furthermore, the performance and mechanisms for reducing atmospheric organic pollutants were discussed, where volatile organic compounds adsorbed onto catalysts were oxidized by ROS to form formic acid intermediates and then further oxidized to CO₂ and H₂O. Cross-disciplinary applications in organic synthesis and biomedicine are also examined, highlighting ROS-enabled green synthesis of pharmaceuticals and efficacy against drug-resistant infections and tumors. Overall, this review provides support for the rational design, performance optimization, environmental risk management, and innovative cross-disciplinary applications of molecular oxygen activation technology.

环境介质中有机污染物的积累对生态环境和人类健康的威胁日益严重，有效清除这些有毒污染物至关重要。近年来，与其他先进氧化技术相比，分子氧活化技术以其绿色、低成本的优势成为降解有机污染物的理想选择。本文综述了不同环境功能材料通过分子氧激活生成活性氧（ROS）的策略和机制。具体而言，分析了该技术对水中有毒有机污染物的去除效率和机制，揭示了水中有机污染物的深度矿化是由于ROS选择性地攻击污染物的富电子位点和关键官能团。此外，还详细介绍了去除土壤中有机污染物的功效和机制，并确定了OH， O₂−和O₂是负责降解有机污染物的关键活性物质。讨论了吸附在催化剂上的挥发性有机化合物被活性氧氧化生成甲酸中间体，再氧化生成CO₂和H₂O的性能和机理。在有机合成和生物医学的跨学科应用也进行了检查，突出ros支持的绿色合成药物和对耐药感染和肿瘤的功效。综上所述，本文为分子氧活化技术的合理设计、性能优化、环境风险管理和跨学科创新应用提供了支持。

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引用次数: 0

Development of sepiolite-TiO2 composites for efficient oil spill remediation 海泡石-二氧化钛复合材料的研究与应用

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.seppur.2026.136815

Minghui Yang , Hongquan Wang , Sen Zhou , Yi Liu , Heng Deng , Juan Mei , Feng Zhou

Oil spills pose severe threats to marine ecosystems, underscoring the urgent need for efficient and sustainable remediation strategies. Herein, sepiolite–TiO₂ (SEP–TiO₂) composites were synthesized via a sol–gel–hydrothermal method, followed by surface hydrophobic modification to obtain hydrophobic SEP–TiO₂ (HSEP–TiO₂) composites. Comprehensive characterizations (SEM, XRD, FTIR, WCA, EDS, XPS) confirmed the successful construction of the composites. The optimized HSEP–TiO₂ catalyst achieved an oil removal efficiency of 97.7% under 150 mg catalyst dosage, 1000 mg/L diesel concentration, 20‰ salinity, and 180 min. Cyclic illumination experiments demonstrated good durability, with 83.8% efficiency retained after five runs, verifying its reusability and stable photocatalytic activity. Moreover, GC–MS analysis identified degradation intermediates and revealed the plausible degradation pathway. This work provides a simple and effective strategy to design clay mineral–based composite photocatalysts with high activity, stability, and application potential for practical oil spill remediation.

Environmental Implication

Oil spills are a major threat to ocean life, and cleaning them up is difficult and costly. Our research has developed a new, promising solution: a special treated powder that uses sunlight to break down oil. This material, made from common and eco-friendly ingredients, was shown to be incredibly effective at removing diesel from water in lab tests. Importantly, it can be reused multiple times without losing its cleaning power, making it a sustainable and potentially cost-effective option. This breakthrough offers a greener and more efficient strategy for tackling future oil spills and safeguarding our oceans.

石油泄漏对海洋生态系统构成严重威胁，迫切需要有效和可持续的补救战略。本文采用溶胶-凝胶-水热法合成海泡石- tio2 （SEP-TiO2）复合材料，并对其表面进行疏水改性，得到疏水SEP-TiO2 （HSEP-TiO2）复合材料。综合表征（SEM， XRD， FTIR， WCA， EDS， XPS）证实了复合材料的成功构建。优化后的HSEP-TiO2催化剂在催化剂用量为150 mg、柴油浓度为1000 mg/L、盐度为20‰、时间为180 min的条件下，除油效率为97.7%。循环光照实验表明，该材料具有良好的耐久性，5次循环后效率保持在83.8%，验证了其可重复使用和稳定的光催化活性。此外，GC-MS分析鉴定了降解中间体并揭示了可能的降解途径。本研究为设计具有高活性、稳定性和应用潜力的粘土矿物基复合光催化剂提供了一种简单有效的方法。对环境的影响石油泄漏是对海洋生物的主要威胁，清理它们既困难又昂贵。我们的研究已经开发出一种新的、有希望的解决方案：一种特殊处理的粉末，利用阳光来分解油。这种材料由常见的环保成分制成，在实验室测试中被证明在去除水中柴油方面非常有效。重要的是，它可以多次重复使用而不会失去其清洁能力，使其成为一种可持续的、具有潜在成本效益的选择。这一突破为应对未来的石油泄漏和保护我们的海洋提供了一种更环保、更有效的策略。

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