JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Yanan Deng,Aihua Zhang,Zheng Zhang,Yidan Xu,Gaiye Li,Montree Hankoy,Mettaya Kitiwan,Shaoyu Wu,Ping Dong,Yang Nan,Weixing Xu,Jianfeng Zhang
Incorporating nanomaterials for a thin film nanocomposite (TFN) layer has been verified effective to improve the separation performance of nanofiltration (NF) membranes, whereas the poor compatibility between nanomaterials and polyamide (PA) matrix leads to a decrease in the salt rejection and pollution resistance. In this study, inspired by a new interface-bridging idea, Ti 3 C 2 T x was bonded with tannic acid-Fe(III) (TA-Fe(III)) complexes, and then incorporated into a PA matrix for the first time to obtain a novel TFN NF membrane. The introduction of TA-Ti 3 C 2 T x was found to effectively reduce the diffusion of piperazine, and thus result in the induction of a thinner, lower roughness, more hydrophilic, and defect-free PA layer. With the addition of 0.015 wt% TA-Ti 3 C 2 T x , the TFN membrane obtained the highest water permeability of 12.17 L m −2 h −1 bar −1 , almost twice that of the pristine membrane, with a high Na 2 SO 4 rejection above 97 %. In addition, the TA-Ti 3 C 2 T x -filled TFN membranes were verified to exhibit excellent antifouling performance and pressure resistance with a high durability, which is crucial for the practical application in salinity water treatment. This study provides an effective strategy to tailor the interfacial microstructural of nanoparticle-filled NF membranes for superior divalent-salinity-water separation.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
·
IF 8.4
Maolin Wang,Mi Deng,Gang Zhao,Yanchun Fan,Tianwen Liu,Ying Huang,Lan Peng,Haoyang Fu,Shengqiong Fang
The remediation of organic-contaminated water is a critical environmental challenge, and iron-based persulfate (PS) activation processes have emerged as a promising solution. However, the introduction of reductive sulfur species, while accelerating the Fe(III)/Fe(II) redox cycle, may also quench reactive species, potentially compromising the efficiency of Fenton-like systems. Here we systematically investigate the trade-off between accelerated Fe(III)/Fe(II) cycling and quenching effects in the zerovalent iron/PS (ZVI/PS) system using thiosulfate (TSF) as an activator. Our results show that low-level TSF (0.03–1.00 mmol/L) effectively facilitated the removal of naphthalene (Nap) and atrazine (ATZ), respectively. This enhancement is attributed to accelerated ZVI dissolution and FeS x formation, which promote the Fe(III)/Fe(II) cycle, with Fe(IV) was identified as the primary active species. However, high-level TSF (>1.0 mmol/L) drastically reduced Nap removal due to PS consumption and active species elimination. The optimal TSF dosage of 0.20 mmol/L (TSF/PS molar ratio of 1:10) demonstrated robust organic pollutant degradation, achieving a 22-fold increase in the rate constant ( k obs ) for Nap removal and 0.47–7.5-fold increases for ATZ removal. These findings highlight the potential of the TSF-ZVI/PS system as a versatile and efficient solution for degrading a wide range of organic pollutants, including PAHs and herbicides, in water treatment applications.
研究领域:
环境科学
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化学工程
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DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2012
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IF 3.285
Wei-Ya Huang,Dan Li,Jun Yang,Zhao-Qing Liu,Yi Zhu,Qi Tao,Kai Xu,Jian-Qiang Li,Yuan-Ming Zhang
Fe(III)-coordinated mesoporous silica adsorbents functionalized with different loadings of ethylenediamine groups were prepared by a new NH 4 F-assisted co-condensation method and impregnation of Fe 3+ cations. Various characterization techniques, e.g. XRD , SEM, TEM, ICP-MS, elemental analysis , FT-IR spectroscopy, and nitrogen adsorption–desorption, were utilized to investigate the effect of functionalization degrees of adsorbents on their chemical composition, surface chemistry, pore structures and phosphate adsorption capacities in detail. In the batch adsorption tests, the functionalized adsorbents with increasing loadings of ethylenediamine groups possessed markedly enhanced adsorption capacities, although there was a gradual loss of ordered mesostructures accompanied. The adsorption isotherms were represented better by using Langmuir model than Freundlich model, which indicated the presence of monolayer adsorption. In particular, for the resulting adsorbent prepared with 0.5:1 M ratio of AAPTS and TEOS, the maximum phosphate capture capacity calculated from Langmuir model is 20.7 mg P/g. In the kinetic study , the phosphate adsorption followed pseudo-second-order equation well with a correlation coefficient of 0.999, suggesting the adsorption process be chemisorption . The phosphate adsorption efficiency of prepared adsorbent was highly pH-dependent and the high removal of phosphate was achieved within the pH between 3.0 and 6.0. The presence of Cl − and NO 3 - exhibited small impacts on the phosphate adsorption by using our synthesized absorbent; whereas, there were significantly negative effects from HCO 3 - and SO 4 2 - on the phosphate removal. In 0.010 M NaOH, more than 90% of the absorbed phosphate anions on the spent adsorbent could be desorbed, suggesting the absorbent with a capacity of regeneration.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOM
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2018
·Vol. 70
·期 12
·2837-2845
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IF 2.145
Zhang Weiguang,Zhang Ting-An,Lv Guozhi,Zhou Weihua,Cao Xuejiao,Zhu Hangyu
The solvent extraction and separation process of Sc(III) and Fe(III) from a strongly acidic and highly concentrated ferric solution using mixtures of di(2-ethylhexyl) phosphate (D2EHPA) and tri-n-butyl phosphate (TBP) in sulfonated kerosene was studied. The effects of various parameters, including D2EHPA concentration, dosage of TBP, and phase ratio, were investigated for the extraction process. The results indicated that the extraction rate of Sc(III) was 99.72% with 1.09% Fe(III) co-extracted after two stages of counter-current extraction under optimal conditions. Moreover, saturation capacity and slope analysis were used to determine the reaction mechanism. Sc(III) is extracted in the form of HSc(SO 4 ) 2 ·4HL. Further separation of Sc(III) and Fe(III) was realized in a scrubbing and stripping process. First, 98.67% of the co-extracted iron in the loaded organic phase was scrubbed with a dilute HCl solution by a three-stage counter-current scrubbing. Then, 85.00% of Sc(III) can be stripped efficiently with a 2-mol/L NaOH solution saturated in 1-mol/L NaCl by three-stage cross-current stripping.
研究领域:
化学工程
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分析化学
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环境科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Meiling Chen,Lin Ding,Shijun Zhu,Xiuqin Xiong,Xinkai Yuan,Yanhua Peng,Liming Yang,Hui Shi,Penghui Shao,Xubiao Luo
The slow Fe(II)/Fe(III) cycle during the Fenton reaction process strongly impedes oxidation efficiency in practical applications. In this study, an activated carbon (AC) assisted Fenton reaction system was used to treat electroplating wastewater containing Ni-ethylenediaminetetraacetic acid (Ni-EDTA). AC was found to enhance the removal of Ni-EDTA in Fenton/Fenton-like reactions. The reported results revealed that AC could effectively promote the regeneration of Fe(II) from Fe(III) species via electron transfer to improve the reaction rather than directly enhancing the H 2 O 2 decomposition to accelerate the production of hydroxyl radicals (•OH). Quenching experiments and EPR also demonstrated that •OH and •O 2 − took part in the radical oxidation process, in which the contribution of •OH was dominant. XPS and FT-IR analysis further confirmed that the carbonyl group (C O) on the surface of AC could indeed act as the dominant active site and an electron donor to directly reduce Fe(III). In addition, electrochemical tests indicated that AC could increase the oxidation potential of Fe(III) to boost the reaction between Fe(III) and H 2 O 2 , thus enabling the transfer of electrons from H 2 O 2 to Fe(III) to facilitate the Fe(II)/Fe(III) cycle. This study might contribute to a new insight into the mechanisms of AC-catalyzed Fenton oxidation processes for the decomplexation heavy metal-EDTA.
研究领域:
环境科学
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化学工程
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废水处理
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2019
·Vol. 26
·期 36
·36410-36422
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IF 2.914
Latif Abdul,Kai Sun,Si Youbin
This study demonstrated, for the first time, Fe(III)/peroximonosulphate (PMS) could be an efficient advanced oxidation process (AOP) for wastewater treatment. Bisphenol A (BPA) was chosen as a model pollutant in the present study. Fe(III)-activated PMS system proved very effective to eliminate 92.18% of BPA (20 mg/L) for 30-min reaction time at 0.50 mM PMS, 1.5 g/L Fe(III), pH 7.0. The maximum degradation of BPA occurred at neutral pH, while it was suppressed at both strongly acidic and alkaline conditions. Organic and inorganic ions can interfere with system efficiency either positively or negatively, so their interaction was thoroughly investigated. Furthermore, the presence of organic acids also affected BPA degradation rate, especially the addition of 10 mM citric acid decreased the degradation rate from 92.18 to 66.08%. Radical scavenging experiments showed that SO 4 •– was the dominant reactive species in Fe(III)/PMS system. A total of 5 BPA intermediates were found by using LC/MS. A possible degradation pathway was proposed which underwent through bridge cleavage and hydroxylation processes. Acute toxicity of the BPA degradation products was assessed using Escherichia coli growth inhibition test . These findings proved to be promising and economical to deal with wastewater using iron mineral for the elimination of organic pollutants.
Graphical abstract
研究领域:
环境科学
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化学工程
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水处理
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PubMed
高影响因子
Frontiers in Chemistry
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2025
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IF 4.2
Xianbing Zhang,Yuheng Liu,Jiajia Yuan
Metal-organic frameworks (MOFs) are recognized as important Fenton-like materials for environmental remediation. However, their applications are often hindered by slow cycling between Fe (III) and Fe (II). This study aimed to address the slow Fe (III)/Fe (II) cycling limitation of Fe-MOFs through dual modification strategy: bimetallic modification and amino functionalization. A series of NH2-MOF(Fe, Co) catalysts with varying Fe/Co ratios were synthesized via a hydrothermal method and evaluated for sulfamethoxazole (SMX) degradation. The optimized NH2-MOF(Fe, Co) catalyst (Fe/Co ratio = 7:3) exhibited substantially enhanced catalytic performance, with SMX removal rate and rate constant in the H2O2 system being 3.2 and 43.5 times higher than those of the Fe-MOF/H2O2 system, respectively. The catalyst demonstrated robust performance across a wide pH range (3.05–7.00), addressing a common limitation of Fenton-like systems. Physicochemical characterization revealed that the enhanced performance was attributed to two key factors: the synergistic effect between Co and Fe in the bimetallic active center, and improved electron transfer to the central metal due to -NH2 functionalization. These modifications effectively addressed the Fe (III)/Fe (II) redox cycling limitation. The proposed reaction mechanism provides insights into SMX degradation pathways in the NH2-MOF(Fe, Co)/H2O2 system. This study presents an efficient and stable MOF-based Fenton-like catalyst with potential applications in wastewater treatment and environmental remediation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Runliang Zhu,Yanping Zhu,Haiyang Xian,Lixia Yan,Haoyang Fu,Gangqiang Zhu,Yunfei Xi,Jianxi Zhu,Hongping He
The generation of Fe(II) from Fe(III) is the rate-limiting step in the heterogeneous Fenton reaction, and accelerating this step is critical for enhancing the reaction efficiency and also the subject of extensive studies. In this work, the oxidized multi-walled carbon nanotubes (CNTs) were coupled with ferrihydrite (Fh) to synthesize novel and highly efficient heterogeneous Fenton catalysts (CNTs/Fh). Interestingly, the calculated apparent rate constants by 3%CNTs/Fh could reach ∼7.1 times as high as that by Fh, well in agreement with the accelerated decomposition rate of H 2 O 2 , as well as the enhanced generation rate of Fe(II) and hydroxyl radicals in the CNTs/Fh system. The density functional theory calculations and the cyclic voltammograms curves both well indicated that the Fe(III)/Fe(II) redox cycling on CNTs/Fh could be significantly enhanced during the Fenton reaction, from both dynamic (accelerating the electron transfer from H 2 O 2 to Fh) and thermodynamic (lowering Fe(III)/Fe(II) redox potential) aspects.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
MICROCHIMICA ACTA
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2018
·Vol. 185
·期 11
·1-10
·
IF 5.705
Zhu Xiang,Wang Jianying,Zhu Yuhua,Jiang Honghao,Tan Di,Xu Ziqiang,Mei Tao,Li Jinhua,Xue Longjian,Wang Xianbao
N,S-co-doped carbon dots (N,S-CDs) were synthesized via a single-step solvothermal process by using sodium lignosulfonate and p-phenylenediamine as carbon/nitrogen/sulfur sources. The N,S-CDs have an average diameter of 2.02 ± 1 nm and display green fluorescence, with excitation/emission peak wavelengths at 380/540 nm for optimal fluorescence. Fluorescence is excitation wavelength-dependent and stable in aqueous salt solutions. The fluorescence of the N,S-CDs is selectively quenched by Fe(III) and Ag(I) ions. These ions can be quantified by fluorometry with a limit of detection of 1.7 μM for Fe(III) ions and 11.6 μM for Ag(I) ions. The N,S-CDs also undergo solvatochromism in that emission is green in water solution but blue in polar organic solvents such as ethanol or N,N-dimethylformamide. The color of fluorescence gradually shifts from green to blue when continuously increasing the fraction of organic solvent in water.
N,S-co-doped carbon dots (N,S-CDs) are synthesized by using sodium lignosulfonate and p-phenylenediamine as C/N/S sources. The N,S-CDs can sensitively detect Fe(III) and Ag(I) ions based on fluorometry, and can be used as a solvatochromic probe.
研究领域:
分析化学
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材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Jiandong Guo,Husheng Jia,Aiqin Zhang,Zhen Pei,Man Luo,Jinbo Xue,Qianqian Shen,Xuguang Liu,Bingshe Xu
Iron-based MOFs have been considered as the candidate for Fenton-like reagents owing to their open pore size and uniformly dispersed Fe active centers. However, the strong coordination of metal ions with organic ligands greatly reduces the exposed active sites of most iron-based MOFs, thus reducing Lewis acid sites and limiting the activation efficiency of H 2 O 2 . At the same time, low Fe 3+ /Fe 2+ cycle efficiency also restricts H 2 O 2 activation efficiency. Hence, in this work, a series of MIL-100 (Fe) containing mixed valence coordinatively unsaturated metal site (CUS) with different Fe 2+ /Fe 3+ ratios was synthesized by heat treatment and used for tetracycline hydrochloride (TC-HCL) degradation with the assistance of visible light. Interestingly, accelerated Fe 3+ /Fe 2+ cycle was observed with the aid of visible light. Among the prepared samples, CUS-MIL-250 prepared under vacuum at 250℃ has superior degradation performance, primarily owing to its large specific surface area and pore volume, improved visible light absorption, and the introduction of more Fe 2+ CUS. Meanwhile, compared with Fenton-like system and photocatalytic system, the CUS-MIL-250/H 2 O 2 /Vis system, with effective separation of photogenerated electrons and holes, demonstrates a synergistic effect to generate more reactive oxidation species, thereby improving the degradation efficiency. In addition, the catalyst shows good stability and recyclability.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMOSPHERE
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2022
·
IF 8.943
Lina Wang,Hanpei Yang,Li Kang,Mi Wu,Yuankun Yang
In this work, Ag/AgCl/FeOCl (Ag–Fe) catalysts were successfully prepared via multistep routes in which Ag was uniformly anchored to the enriched Cl sites provided by exfoliated FeOCl nanosheets. Among these Ag–Fe catalysts, 5% Ag–Fe exhibited the highest pseudo first-order kinetic constant 0.1056 min −1 for photo-Fenton degradation of Rhodamine B (RhB), which was 11 times higher than that of FeOCl (0.0096 min −1 ). Ag–Fe catalysts exposed more coordinatively unsaturated Fe active sites to coordinate with H 2 O 2 due to the cleavage of Fe–Cl bond. The exposed coordinatively unsaturated Fe(III) active sites could capture the photoinduced electrons and reduce them to Fe(II), which boosted the separation efficiency of photogenerated charge carriers. Meanwhile, the photogenerated electrons of Ag 0 transferred to the FeOCl, promoting the reduction of Fe(III) to Fe(II). In addition, the intensified visible light adsorption (SPR effect) was achieved after introducing Ag/AgCl nanoparticles on exfoliated FeOCl. Hydroxyl radicals (·OH) and holes (h + ) were determined as the main reactive oxidative species (ROS) in the photo-Fenton degradation process.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
ACS Nano
·
2024
·
IF 15.8
Qing Luo,Qian Ma,Taoxia Liu,Yiting Luo,Lianying Wang,Chang Guo,Leyu Wang
We developed an intrinsic hydrophilic single-atom iron nanobowl (Fe-SANB) for magnetic resonance imaging (MRI)-guided tumor microenvironment-triggered cancer therapy. Benefiting from the sufficient exposure of Fe single atoms and the intrinsic hydrophilicity of the bowl-shaped structure, the Fe-SANBs exhibited a superior performance for T1-weighted MRI with an r1 value of 11.48 mM–1 s–1, which is 3-fold higher than that of the commercial Gd-DTPA (r1 = 3.72 mM–1 s–1). After further coembedding Gd single atoms in the nanobowls, the r1 value can be greatly improved to 19.54 mM–1 s–1. In tumor microenvironment (TME), the Fe-SANBs can trigger pH-induced Fenton-like activity to generate highly toxic hydroxyl radicals for high-efficiency chemodynamic therapy (CDT). Both the MRI and CDT efficiency of these nanobowls can be optimized by tuning the ratio of Fe(II)/Fe(III) in the Fe-SANBs via controlling the calcination temperature. Furthermore, the generation of •OH at the tumor site can be accelerated via the photothermal effect of Fe-SANBs, thus promoting CDT efficacy. Both in vitro and in vivo results confirmed that our nanoplatform exhibited high T1-weighted MRI contrast, robust biocompatibility, and satisfactory tumor treatment, providing a potential nanoplatform for MRI-guided TME-triggered precise cancer therapy.
研究领域:
生物医学工程
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纳米医学
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肿瘤学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）