Separation and Purification Technology最新文献

筛选
英文 中文
Molten salt-driven basic site evolution in brucite-derived MgO for high-capacity and durable intermediate temperatures CO2 capture 熔融盐驱动的镁石衍生MgO基位演化用于高容量和持久的中温CO2捕集
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-11 DOI: 10.1016/j.seppur.2025.135626
Xinyang He, Yushu Chen, Xueyun Zhong, Mingjia Ma, Sijia Weng, Peng Liu, Mingli Fu, Steven L. Suib, Pingxiao Wu, Daiqi Ye
{"title":"Molten salt-driven basic site evolution in brucite-derived MgO for high-capacity and durable intermediate temperatures CO2 capture","authors":"Xinyang He, Yushu Chen, Xueyun Zhong, Mingjia Ma, Sijia Weng, Peng Liu, Mingli Fu, Steven L. Suib, Pingxiao Wu, Daiqi Ye","doi":"10.1016/j.seppur.2025.135626","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135626","url":null,"abstract":"MgO was obtained from the calcination of naturally occurring brucite (Mg(OH)<sub>2</sub>) and the NaNO<sub>3</sub> was used to promote carbon capture at 300 °C under 50 % CO<sub>2</sub>. As the mass ratio of NaNO<sub>3</sub>/MgO is 22 %, the CO<sub>2</sub> adsorption capacity achieves to 438.2 mg/g initially and remains 75 % at the 30th cycle. The molten NaNO<sub>3</sub> fills into the pores of MgO and facilitates the crystallite growth, resulting in the specific surface area from 114 m<sup>2</sup>/g to 12 m<sup>2</sup>/g. However, due to the dissociation of Mg<sup>2+</sup>-O<sup>2−</sup> bonds by molten NaNO<sub>3</sub>, the medium basic sites increase to 8.21 mmol/g, enhancing of CO<sub>2</sub> adsorption. The initial adsorption in first 10 mins is fast and the subsequent slow adsorption accounts for over 90 % of the total CO₂ adsorption. <em>In situ</em> characterization confirms the contribution of NaNO<sub>3</sub> in the carbonation, which provides O<sup>2−</sup> by itself and dissolves the MgO. Precipitates of MgCO<sub>3</sub> grow into particles in melting NaNO<sub>3</sub> rather than impermeable layers, so the carbonation level of MgO improves to 40 %. The decrease of 25 % adsorption capacity is ascribed to residual carbonates after desorption at 450 °C. DFT calculations demonstrate that the adsorption energy decreases with the loading of NaNO<sub>3</sub> on MgO, as the valence band maximum gets closer to the Fermi level. After the carbonation of NaNO<sub>3</sub>-modified MgO, the π-bonding electronic state of CO<sub>2</sub> and the p-band center of the substrate moves away from the Fermi level, indicating a stable configuration. This study provides a promising brucite-derived adsorbent for medium-temperature CO<sub>2</sub> capture.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"14 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261127","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}
引用次数: 0
Polydopamine as electron shuttle and dispersant: Unlocking nZVI reactivity coupled with Shewanella oneidensis MR-1 for efficient Cr(VI) removal 聚多巴胺作为电子穿梭和分散剂:解锁nZVI反应性,与希瓦氏菌MR-1结合,有效去除Cr(VI)
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-11 DOI: 10.1016/j.seppur.2025.135630
Liwen Zhang , Shaohua Chen , Shanyi Tan , Huizi Wen , Shuyu He , Fen Zhang , Xiangru Zuo , Ling Xiong
{"title":"Polydopamine as electron shuttle and dispersant: Unlocking nZVI reactivity coupled with Shewanella oneidensis MR-1 for efficient Cr(VI) removal","authors":"Liwen Zhang ,&nbsp;Shaohua Chen ,&nbsp;Shanyi Tan ,&nbsp;Huizi Wen ,&nbsp;Shuyu He ,&nbsp;Fen Zhang ,&nbsp;Xiangru Zuo ,&nbsp;Ling Xiong","doi":"10.1016/j.seppur.2025.135630","DOIUrl":"10.1016/j.seppur.2025.135630","url":null,"abstract":"<div><div>The inherent limitations of nano zero-valent iron (nZVI) severely limit its widespread application in heavy metal pollution remediation. To address this, <em>Shewanella oneidenis</em> MR-1 (MR-1) was utilized to counteract the iron oxide passivation layer on nZVI surface, however, this approach suffered from low electron transfer rate between MR-1 and the passivation layer. In this research, a novel PDA-modified nZVI composite (PDA-nZVI) was synthesized. Compared to unmodified nZVI, the proportions of Fe<sup>0</sup> and Fe(II) on the PDA-nZVI surface increased 2.06 % and 21.63 %, respectively. The electrochemical tests (e.g., a more negative corrosion potential, a lower charge-transfer resistance, a higher current density, and a 3.4-times larger electrochemical active surface area for PDA-nZVI compared to nZVI) confirm that PDA enhances electron transfer from iron core to the outside, thereby promoting Fe<sup>0</sup> availability and Fe(II) generation on the PDA-nZVI surface. Meanwhile, PDA modification successfully enhanced the material's dispersibility and hydrophilicity in aqueous solutions. Results demonstrate that the Cr(VI) elimination capacity of the PDA-nZVI and MR-1 combined system (PDA-nZVI/MR-1) was markedly superior to that of the nZVI/MR-1 system. Mechanism analyses demonstrate that PDA can act as an electron shuttle to accelerate electron transfer between MR-1 and the passivation layer, thereby promoting more Fe(III) transformation to Fe(II). This process enables more Cr(VI) to be reduced to Cr(III), which is subsequently adsorbed or complexed on the material surface as Cr<sub>2</sub>O<sub>3</sub>/FeCr<sub>2</sub>O<sub>4</sub> and Cr<sub>x</sub>Fe<sub>1-x</sub>(OH)<sub>3</sub>, ultimately being removed from the solution via co-precipitation. The PDA-nZVI/MR-1 system successfully overcomes the inherent limitations and exhibits an exceptional Cr(VI) elimination capability</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"381 ","pages":"Article 135630"},"PeriodicalIF":9.0,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145260918","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}
引用次数: 0
Solvent resistant integrally skinned asymmetric polyimide nanofiltration membrane based on thermal treatment for the efficient separation and concentration of spiramycin 基于热处理的耐溶剂整体蒙皮不对称聚酰亚胺纳滤膜用于螺旋霉素的高效分离和浓缩
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-11 DOI: 10.1016/j.seppur.2025.135620
Chen-Jie Wei, Hao-Nan Yang, Yan-Nan Wu, Yuan-Xue Li, Jing-Feng Chen, Chen Peng, Li-Gang Lin, Li-Fen Liu
{"title":"Solvent resistant integrally skinned asymmetric polyimide nanofiltration membrane based on thermal treatment for the efficient separation and concentration of spiramycin","authors":"Chen-Jie Wei, Hao-Nan Yang, Yan-Nan Wu, Yuan-Xue Li, Jing-Feng Chen, Chen Peng, Li-Gang Lin, Li-Fen Liu","doi":"10.1016/j.seppur.2025.135620","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135620","url":null,"abstract":"The isolation of spiramycin (SPM), a macrolide antibiotic with potent activity against gram-positive bacteria and intracellular pathogens, is critical for pharmaceutical applications and antimicrobial research. As emerging antibiotic resistance underscores the need for effective therapeutics, efficient extraction and purification of SPM from fermentation broths remain essential to ensure its availability for clinical use, industrial production, and structural derivatization. Compared with the traditional separation processes, membrane process has attracted extensive attention owing to its low cost, high separation efficiency, and energy savings in the traditional medicine industry. A novel soluble polyimide (PI) material with flexible branches and imide rings was synthesized based on molecular structure design. Using the homemade polymer material, a novel recyclable, acid-alkali resistant and solvent resistant PI nanofiltration (NF) membrane was fabricated for SPM extraction. The membrane exhibited optimal performance at 20 wt% solid content, and the effects of pressure, flow rate, concentration, and temperature on its separation performance were investigated. The rejection rate of SPM was &gt;91 % and the permeance of butyl acetate reached 21 L/(m<sup>2<strong>.</strong></sup>h), respectively. The permeances of rose Bengal in methanol, acetone, and isopropyl alcohol were 38, 48, and 10 L/(m<sup>2<strong>.</strong></sup>h), with separation performances of 92.0 %, 92.3 %, and 92.4 %, respectively. Moreover, the enhanced stability with a permeance of 21 L/(m<sup>2<strong>.</strong></sup>h) and rejection of &gt;91 % for SPM was maintained after five days of long-term practical operation. The obtained PI NF membrane is prospective for improving traditional antibiotic extraction and advancing nanofiltration membrane in the pharmaceutical system.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"35 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145260915","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}
引用次数: 0
Recent advances in antibiotic removal methods from wastewater: A comprehensive review 废水中抗生素去除方法的研究进展综述
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-11 DOI: 10.1016/j.seppur.2025.135478
Insha Hamid, Waheed Ahmad Khanday
{"title":"Recent advances in antibiotic removal methods from wastewater: A comprehensive review","authors":"Insha Hamid, Waheed Ahmad Khanday","doi":"10.1016/j.seppur.2025.135478","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135478","url":null,"abstract":"The incessant consumption of antibiotics globally has led to widespread contamination across ecosystems, particularly aquatic ones. Acute and chronic exposures to antibiotics via the consumption of water contaminated by them pose serious health risks. This review discusses antibiotic classification, the impacts of antibiotic pollution on the environment, and exhaustively details the recent trends and advances in various biological, chemical, and physical antibiotic removal methods, discussing various research studies along with the advantages and disadvantages of each method. It is deduced herein that the biological methods may lead to the generation and spread of antibiotic-resistant bacteria (ARB) in some cases, while the chemical methods are largely limited by exorbitant costs and secondary pollution. Among the physical methods of antibiotic pollution remediation, adsorptive removal via agricultural/biomass waste-derived activated carbons (ACs) and biochars (BCs) exhibits the most potential for removing antibiotics from water and wastewater in a cleaner, simpler, and cheaper manner, bolstering the principle of circular economy and helping mitigate and/or eliminate aquatic antibiotic pollution sustainably. Agricultural/biomass waste-derived carbons, especially when magnetized or chemically enhanced, present a strong balance between cost, performance, and environmental safety.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"154 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261123","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}
引用次数: 0
Insight into synthesis of graphitized activated carbons with high oxidation resistance for gas adsorption 高抗氧化气体吸附石墨化活性炭的合成研究
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-11 DOI: 10.1016/j.seppur.2025.135623
Junfeng Li, Wei Zhou, Xiaoxiao Meng, Jingyu Li, Zhipei Tang, Min Xie, Chunwei Zhang, Luming Li, Fei Sun, Haibo Liu, Xiu You, Yingzhu Guo, Xinkui Mei, Jihui Gao, Guangbo Zhao
{"title":"Insight into synthesis of graphitized activated carbons with high oxidation resistance for gas adsorption","authors":"Junfeng Li, Wei Zhou, Xiaoxiao Meng, Jingyu Li, Zhipei Tang, Min Xie, Chunwei Zhang, Luming Li, Fei Sun, Haibo Liu, Xiu You, Yingzhu Guo, Xinkui Mei, Jihui Gao, Guangbo Zhao","doi":"10.1016/j.seppur.2025.135623","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135623","url":null,"abstract":"Oxidation resistance is a critical factor restricting the industrial application of activated carbons (ACs). To address this issue, we propose a two-step activation–carbonization strategy to prepare graphitized ACs with high porosity and oxidation resistance. The activation process achieved a well-developed pore structure, while the subsequent carbonization process facilitated high-temperature pyrolysis and catalytic graphitization, leading to short-range microcrystalline reorganization and functional groups decomposition. Among the tested catalysts, Ni exhibited the strongest catalytic effect on graphitization, significantly enhancing both the graphitization degree and microcrystalline size of ACs compared to Fe and Co. Interestingly, the decomposition of functional groups and the growth of microcrystalline are major strategies for the increase in oxidation resistance of ACs, where the average microcrystalline size is linearly correlated with the oxidative activation energy. Owing to low content of functional groups and high graphitization degree, the loss of toluene adsorption capacity decreased from 16.5 % to 4.3 % in the humid environment, and the isosteric heat of CO<sub>2</sub> adsorption decreased. This work not only develops an effective strategy for improving oxidation resistance of ACs but also provides valuable insights for their industrial applications in gas adsorption.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"121 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145260817","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}
引用次数: 0
Scalable synthesis of bimetallic ZIF membranes on the inner-surface of ZnO hollow fiber for gas separation 气体分离用ZnO中空纤维内表面可扩展合成双金属ZIF膜
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-10 DOI: 10.1016/j.seppur.2025.135607
Hanhan Chen, Xiaobin Wang, Shude Zhang, Jaka Sunarso, Yusak Hartanto, Fuping Li, Shaomin Liu
{"title":"Scalable synthesis of bimetallic ZIF membranes on the inner-surface of ZnO hollow fiber for gas separation","authors":"Hanhan Chen, Xiaobin Wang, Shude Zhang, Jaka Sunarso, Yusak Hartanto, Fuping Li, Shaomin Liu","doi":"10.1016/j.seppur.2025.135607","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135607","url":null,"abstract":"Metal-organic framework (MOF) membranes with high stability and porosity have shown great potential for efficient hydrogen separation. As a result, searching for a simple and efficient synthesis method to synthesize large-area, continuous, and dense MOF membrane has received an extensive attention. In this work, we demonstrated that a support-induced synthesis strategy to fabricate a series of 20-cm long bimetallic Zn/Co-ZIF membranes on the inner surface of ZnO hollow fiber. Uniform-thickness Zn/Co-ZIF membranes were prepared by periodically inverting the autoclave to alter the flow state of the synthesis solution inside the hollow fibers. The obtained Zn/Co-ZIF membrane showed a good H<sub>2</sub>/CH<sub>4</sub> selectivity of 15.75 with a H<sub>2</sub> permeance of 1.15 × 10<sup>−7</sup> mol·m<sup>−2</sup>·s<sup>−1</sup>·Pa<sup>−1</sup> and the membrane displayed excellent long-term operation stability for 20 days. Furthermore, the 11 Zn/Co-ZIF membranes (with a membrane area up to about 100.91 cm<sup>2</sup>) were successfully prepared in an autoclave in order to further improve the metal source utility. These membranes exhibited similar H<sub>2</sub> separation performance, with H<sub>2</sub>/CH<sub>4</sub> selectivities of 12.69–14.59 and H<sub>2</sub> permeances of 1.64–2.05 × 10<sup>−7</sup> mol·m<sup>−2</sup>·s<sup>−1</sup>·Pa<sup>−1</sup>, demonstrating excellent reproducibility.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"86 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145255031","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}
引用次数: 0
Revealing the mechanism of singlet oxygen formation during the activation of Peroxymonosulfate by Feco dual-atom catalysts 揭示了Feco双原子催化剂活化过氧单硫酸盐过程中单线态氧的形成机理
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-10 DOI: 10.1016/j.seppur.2025.135590
Baixiang Zhao, Yingtong Li, Yanye Tian, Guang-Guo Ying, Jie Zhong, Deli Wu, Yong Feng
{"title":"Revealing the mechanism of singlet oxygen formation during the activation of Peroxymonosulfate by Feco dual-atom catalysts","authors":"Baixiang Zhao, Yingtong Li, Yanye Tian, Guang-Guo Ying, Jie Zhong, Deli Wu, Yong Feng","doi":"10.1016/j.seppur.2025.135590","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135590","url":null,"abstract":"The development of selective reactive oxygen species is crucial for the efficient removal of organic contaminants. Iron‑cobalt dual-atom catalysts (FeCoDACs) show great promise for generating singlet oxygen <span><span>(1O<sub>2</sub>)</span></span>, a highly selective species, through the activation of peroxymonosulfate (PMS), but the formation mechanism remains unclear. In this study, FeCoDACs were synthesized via a facile pyrolysis method, and the activation of PMS by these catalysts for pollutant degradation and <sup>1</sup>O<sub>2</sub> generation was systematically investigated. Near-complete degradation of sulfamethoxazole was achieved after 30 min of reaction in the presence of 0.5 mM PMS and 0.05 g/L FeCoDACs. The formation of <sup>1</sup>O<sub>2</sub> during PMS activation was confirmed by electron paramagnetic resonance spectroscopy, and the formation kinetics were examined through quantification of 2,2,6,6-tetramethylpiperidine 1-oxide. Due to the high selectivity of <sup>1</sup>O<sub>2</sub>, the presence of common water constituents—except for natural organic matter—did not adversely affect the treatment performance. For the same reason, the oxidative system performed well in treating real water matrices. Density functional theory calculations revealed that cleavage of the S<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>O bond in PMS, rather than the peroxone bond occurred during activation by FeCoDACs, leading to the formation of high-valent iron-oxo species as a key intermediate for <sup>1</sup>O<sub>2</sub>. The oxygen in the iron-oxo species then combined with oxygen from an adjacent site to form an OO* intermediate, which dissociated from the catalyst surface, resulting in the formation of <sup>1</sup>O<sub>2</sub>. These findings are expected to enhance understanding of <sup>1</sup>O<sub>2</sub> formation during PMS activation by DACs","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"37 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145255075","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}
引用次数: 0
Critical review of organic radical chemistry in peracetic acid-based advanced oxidation processes for water decontamination 过氧乙酸为基础的水净化高级氧化工艺中有机自由基化学的研究进展
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-10 DOI: 10.1016/j.seppur.2025.135603
Shaohua Wu , Yijuan Zhao , Rongrong Sun , Xiang Li , Chunping Yang , Jun Ma
{"title":"Critical review of organic radical chemistry in peracetic acid-based advanced oxidation processes for water decontamination","authors":"Shaohua Wu ,&nbsp;Yijuan Zhao ,&nbsp;Rongrong Sun ,&nbsp;Xiang Li ,&nbsp;Chunping Yang ,&nbsp;Jun Ma","doi":"10.1016/j.seppur.2025.135603","DOIUrl":"10.1016/j.seppur.2025.135603","url":null,"abstract":"<div><div>Advanced oxidation processes (AOPs) are recognized as state-of-the-art technologies for environmental decontamination, leveraging the generation of highly reactive species (RS). However, current reviews primarily address common inorganic radicals and nonradicals RS, often neglecting the critical role of organic radicals (R-O<sup>•</sup>) such as acetyloxyl radical (CH<sub>3</sub>C(<em>O</em>)O<sup>•</sup>) and acetyl peroxyl radical (CH<sub>3</sub>C(<em>O</em>)OO<sup>•</sup>). Compared to inorganic radicals (e.g., hydroxyl radical), R-O<sup>•</sup> exhibit superior selectivity, longer lifetimes, and the potential to serve as carbon sources for biological treatment or to drive polymerization reactions yielding high value-added products (e.g., polymers), rendering R-O<sup>•</sup>-mediated AOPs as promising candidates in water treatment. This critical review examines the fundamental knowledge of R-O<sup>•</sup> chemistry in peracetic acid (PAA)-based AOPs and their recent advancements in water decontamination. Firstly, we outline the chemical properties and generation mechanisms of R-O<sup>•</sup>. Subsequently, their oxidative behaviors (including kinetics, mechanisms, water matrix effects, byproduct formation, and toxicity) in pollutant degradation are systematically compared from a practical implementation perspective. Furthermore, the identification methods of R-O<sup>•</sup> are summarized and key existing controversies are discussed concerning the selection of scavengers/probes and the interpretation of experimental results. Future research should prioritize clearly elucidating R-O<sup>•</sup> origins over heterogeneous catalysts, developing highly sensitive in-situ detection techniques and advanced R-O<sup>•</sup> regulation strategies, and conducting systematic assessments for engineering applications. This work provides a foundational understanding of the character, reactivity, generation, and identification of R-O<sup>•</sup> in PAA-based AOPs, advancing their role in sustainable environmental remediation.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"381 ","pages":"Article 135603"},"PeriodicalIF":9.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145255032","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}
引用次数: 0
Recovery of titanium from low-grade titanium alloy grinding scrap: Staged regulation of the conversion of Ti, TixOy to TiO2 从低品位钛合金磨屑中回收钛:Ti、TixOy向TiO2转化的阶段性调控
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-10 DOI: 10.1016/j.seppur.2025.135609
Kun Lin, Zijian Su, Xianglin Cheng, Tao Jiang, Yuanbo Zhang
{"title":"Recovery of titanium from low-grade titanium alloy grinding scrap: Staged regulation of the conversion of Ti, TixOy to TiO2","authors":"Kun Lin, Zijian Su, Xianglin Cheng, Tao Jiang, Yuanbo Zhang","doi":"10.1016/j.seppur.2025.135609","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135609","url":null,"abstract":"Titanium alloy grinding scrap (TAGS) is a low-grade scrap produced by grinding during titanium alloy processing. Due to the high impurity content and complex phase composition, TAGS currently has no effective resource utilization pathway. In this study, a new method based on ball milling pretreatment, cascade electrostatic separation, oxidative roasting, and acid leaching was proposed to achieve deep separation and purification of Ti from low-grade TAGS. The results show that the resistivity between the titanium-containing phase and the impurity in TAGS varied greatly, and the resistivity of titanium metal was significantly lower than that of Ti<sub>x</sub>O<sub>y</sub> and TiO<sub>2</sub>. The stripping of the high-resistivity oxide layer from the surface layer of titanium metal was achieved by ball milling under an N<sub>2</sub> atmosphere, which significantly enhanced the effect of cascade electrostatic separation. It was beneficial to increase the roasting temperature and time to promote the conversion of Ti and Ti<sub>x</sub>O<sub>y</sub> to TiO<sub>2</sub>. TiO<sub>2</sub> with a rutile structure did not dissolve during the HCl leaching process. Except for corundum (Al<sub>2</sub>O<sub>3</sub>), most of the impurities (Fe<sub>2</sub>O<sub>3</sub>, MgAl<sub>2</sub>O<sub>4</sub>, etc.) would react with HCl and enter the solution as ions. Under the optimized conditions (ball milling time = 30 min, voltage = 21 kV, cascade electrostatic separation 3 times, roasting temperature = 950 °C, roasting time = 3 h), the Ti grade was increased from 18.36 wt% to 54.86 wt% with a TiO<sub>2</sub> content of 91.44 wt%. The Ca and Mg content (CaO + MgO) in the products was &lt;1.25 wt%, which met the requirement of titanium-rich material and realized the high-value utilization of low-grade TAGS.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"32 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145255538","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}
引用次数: 0
Preparation of organic solvent nanofiltration membranes by interfacial polymerization with phosphonic acid additives in aqueous phase 水相界面聚合制备有机溶剂纳滤膜的研究
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-10 DOI: 10.1016/j.seppur.2025.135621
Henan Peng, Sizhuo Jin, Fengqin Hong, Pan Chen, Chunhai Chen, Daming Wang, Hongwei Zhou
{"title":"Preparation of organic solvent nanofiltration membranes by interfacial polymerization with phosphonic acid additives in aqueous phase","authors":"Henan Peng, Sizhuo Jin, Fengqin Hong, Pan Chen, Chunhai Chen, Daming Wang, Hongwei Zhou","doi":"10.1016/j.seppur.2025.135621","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135621","url":null,"abstract":"In this research, several phosphonic acid additives were integrated into the aqueous phase to create organic solvent nanofiltration membranes through interfacial polymerization. The main objective was to examine how varying concentrations of aminotrimethylene phosphonic acid influence the separation efficiency of nanofiltration membranes. The hydrogen bonds were formed between the amino (NH<sub>2</sub>) groups in the aqueous-phase monomer (MPD) and the phosphonic acid group, which in turn reduced the rate at which MPD diffused into the organic phase. This process resulted in the formation of a thinner active layer of polyamide (PA), which enhanced the permeance of methanol and other pure solvents. Moreover, the nanofiltration membrane's surface, which was created using phosphonic acid additives, showed enhanced roughness, resulting in the development of elevated polyamide clusters. The addition of hydrophilic groups enhanced the membrane surface's hydrophilicity, allowing for the swift movement of polar solvents. The solvent permeance of nanofiltration membranes exhibited varying degrees of enhancement following the incorporation of phosphonic acid additives. Notably, the permeance for methanol achieved a value of 12.5 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>, while the rejection rate for Rhodamine B (RDB) dyes remained at an impressive 98.5 %. The vitamin B12-methanol solution was continuously filtered for 90 min to obtain a 106 times concentrated solution (from 20 mg/L to 2125 mg/L). This study introduces a novel research methodology for the development of nanofiltration membranes optimized for organic solvents.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"1 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145260921","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}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信