JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Jingye Cui,Huan He,Wanqi Shi,Zhicheng Liao,Danni Cui,Jianxiang Yang,Yixin Liu,Chaochao Lai,Bin Huang,Xuejun Pan
Microbial-derived extracellular polymeric substances (EPS) and iron minerals are ubiquitous in aquatic environments, and they can influence the fate of organic micropollutants such as 17α-ethinylestradiol (EE2). However, the interactions between EPS and iron minerals, and their influence on EE2 photodegradation, are seldom addressed in the literature. This study explored the effects of EPS derived from different aerobic or anaerobic microbials on the reductive dissolution of ferrihydrite (Fhy) and subsequent EE2 photodegradation, with emphasis on the impact of Fe-EPS complexes formation. In the dark, EPS could promote the reductive dissolution of Fhy via ligand-metal charge transfer, accompanied by Fe(III)-EPS complexes formation. Irradiation could further enhance such a dissolution process. Dissolved iron could accelerate the photolysis of protein and humic substances, triggering Maillard-like reactions that form the unsaturated medium- or high-molecular-weight polymers. The aerobic-EPS containing more proteins and humic substances photodegraded EE2 more effectively than anaerobic-EPS, with the triplet excited state playing a crucial role. In contrast, Fhy inhibited EPS-mediated EE2 photodegradation via light-shielding effect or photosensitizers oxidative decomposition. The information obtained in this research would contribute to the understanding of photochemistry involving EPS, iron minerals, and steroid estrogens, providing new insights into their environmental behavior.
研究领域:
环境化学
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光化学
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环境科学
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微生物学
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地球化学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Qingwen Long,Feng Liu,Yanjie Yuan,Yuting Dai,Chunli Wang,Xuheng Li,Jing Zhang
In this study, heterogeneous Fenton-like catalyst, nano-Fe° encapsulated in hydrothermal carbon (Fe°/HTCC), was prepared via a green chemistry route, aiming at increasing the degradation efficiency of p-chlorophenol (4-CP) by controlling the stability of the catalyst and Fe(III)/Fe(II) cycling in the advanced oxidation process. The degradation of 4-CP by heterogeneous Fenton reactions was conducted with the assistance of visible light, which was monitored with the aid of the HPLC and total organic carbon analysis. The results revealed that Fe°/HTCC composite markedly enhanced both the degradation (100 %) and the mineralization efficiency (∼73.9 %) for 100 mg/L 4-CP within 60 min at pH 4.0. More importantly, the catalyst presented a high stability to resist the side oxidation, where the removal efficiency was maintained even after 5 successive cycling experiments. Electron spin resonance confirmed that in the presence of both HTCC and visible light irradiation greatly enhanced the production of •OH for the degradation and mineralization of 4-CP, which can be attributed to the enhancement of Fe(III)/Fe(II) cycling. This study paves a new way toward the rational design of Fe°–carbon composites as heterogeneous Fenton-like catalysts for potential applications into wastewater treatment.
研究领域:
环境科学
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化学工程
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材料科学
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产品关联
DOI
高影响因子
ACS ES&T Water
·
2025
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IF 4.3
Ting Li,Xiqing Wang,Xin Du,Murong Wang,Jianru Liang,Lixiang Zhou
The widespread application of Fe-based heterogeneous Fenton in water treatment is hindered by two main challenges: the inefficiency of the Fe(III)/Fe(II) redox cycle and the requirement of acidic conditions. In this study, combining schwertmannite with iron phosphide (Sch/FeP) via pre-adding FeP in the formation process of Sch could enhance the Fe(II)/Fe(III) conversion and self-producing acidic environment by SO42– substitution. Specifically, the inclusion of FeP in the Sch/FeP composite markedly increased the content of ≡Fe(II) species, thereby improving the activation of H2O2 to produce substantial quantities of •OH and •O2– radicals. Sch/FeP-driven heterogeneous Fenton exhibited high total organic carbon (TOC) removal (∼60%) and utilization efficiency of H2O2 (100%) after 20 min. Furthermore, Sch/FeP exhibited excellent degradation performance across a broad pH range (2–10), which could be attributed to the SO42– substitution reaction. This study not only addresses critical challenges in heterogeneous Fenton processes but also provides a novel strategy for modifying sulfate minerals to enhance their environmental applicability.
研究领域:
环境化学
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催化
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水处理
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材料科学
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高级氧化工艺
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产品关联
DOI
高影响因子
Nano Research
·
2020
·Vol. 13
·期 1
·273-281
·
IF 8.183
Zhang Tao,Jiang Zhenqi,Chen Libin,Pan Chunshu,Sun Shan,Liu Chuang,Li Zihou,Ren Wenzhi,Wu Aiguo,Huang Pintong
As nanomedicine-based clinical strategies have continued to develop, the possibility of combining chemotherapy and singlet oxygen-dependent photodynamic therapy (PDT) to treat pancreatic cancer (PaC) has emerged as a viable therapeutic modality. The efficacy of such an approach, however, is likely to be constrained by the mechanisms of drug release and tumor oxygen levels. In the present study, we developed an Fe(III)-complexed porous coordination network (PCN) which we then used to encapsulate PTX (PCN-Fe(III)-PTX) nanoparticles (NPs) in order to treat PaC via a combination of chemotherapy and PDT. The resultant NPs were able to release drug in response to both laser irradiation and pH changes to promote drug accumulation within tumors. Furthermore, through a Fe(III)-based Fenton-like reaction these NPs were able to convert H 2 O 2 in the tumor site to O 2 , thereby regulating local hypoxic conditions and enhancing the efficacy of PDT approaches. Also these NPs were suitable for use as a T 1 -MRI weighted contrast agent, making them viable for monitoring therapeutic efficacy upon treatment. Our results in both cell line and animal models of PaC suggest that these NPs represent an ideal agent for mediating effective MRI-guided chemotherapy-PDT, giving them great promise for the clinical treatment of PaC.
研究领域:
肿瘤学
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放射学
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纳米医学
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治疗诊断学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 14
·7883
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IF 4.9
Bingkai Han,Yuan Chen,Hongtao Wang,Jilong Yan,Guang Liu,Ziru Huang,Chenghang Zhou
Epinephrine (EP) is a very important chemical transmitter in the transmission of nerve impulses in the central nervous system of mammals. Ascorbic acid (AA) is considered to be the most important extracellular fluid antioxidant and has important antioxidant properties in the cell. In this study, a series of transition metal–polyhistidine-carboxylated multi-wall carbon nanotube nanocomposites were synthesized, and their simultaneous catalytic effects on epinephrine and ascorbic acid were investigated. The results showed that nanocomposites based on iron ions had the highest catalytic activity. The prepared biosensor expressed high selectivity toward EP and AA with LOD values of 0.1 μΜ (AA) and 0.01 μΜ (EP), and sensitivity values of 4.18 μA mM−1with a range of 0.001–5 mM (AA), 50.98 μA mM−1with a range of 0.2–100 μM (EP), and 265.75 μA mM−1with a range of 0.1–1.0 mM (EP). Moreover, it showed good stability, good repeatability and high selectivity in real sample detection. This work is a reference for the design of new electrochemical enzyme-free biosensors and the detection of biomarkers.
研究领域:
纳米技术
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分析化学
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电化学
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生物传感器
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2016
·Vol. 6
·期 73
·69370-69380
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IF 3.289
Juncai Zhang,Youning Chen
With chloromethylated polystyrene resin being the base material, a new type of salicylic acid-type chelating resin with high capacity was prepared by grafting glycidyl methacrylate (GMA) on the surface of the resin via surface-initiated atom transfer radical polymerization and followed by the derivatization with 5-aminosalicylic acid. Fourier-transform infrared spectrometry and X-ray photoelectron spectroscopy were used to characterize the surface composition of the resin. It was found that the grafting degree of GMA increased linearly with the extension of ATRP time and GMA concentration. The maximum adsorption capacities of the resin were up to 4.23 mmol g−1 for Fe(III), 4.02 mmol g−1 for Ag(I), 2.36 mmol g−1 for Ni(II) and 1.75 mmol g−1 for Cu(II) at pH 4.0, respectively. The adsorption kinetics of the four metal ions conform to the model of pseudo second-order kinetics, and adsorption equilibria were better characterized by the Langmuir equation. Thermodynamic parameters were calculated to understand the nature of the adsorption process. The resin possesses excellent desorption rate and reusability. All these results indicate that the resin could be potentially applied to the efficient removal of heavy metal ions from waste water.
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
高影响因子
WATER RESEARCH
·
2023
·
IF 12.8
Wenyu Liu,Li Long,Zhe Yang,Li Wang,Qimao Gan,Shenghua Zhou,Pulak Sarkar,Hao Guo,Chuyang Y. Tang
Nanofiltration technology has been applied in a variety of water treatment scenarios. However, conventional thin-film composite (TFC) membranes fail to remove emerging organic micropollutants (OMPs) efficiently. Here we applied thin-film nanocomposite membrane with an interlayer (TFNi) of Fe (III)-tannic acid to remove various types of OMPs, such as endocrine disrupting chemicals (EDCs), pharmaceutically active compounds (PhACs), and perfluoroalkyl substances (PFASs). Compared to the pristine TFC membrane, TFNi membrane exhibited crumpled morphology and its rejection layer was denser, better cross-linked and possessed smaller average pore size with narrower distribution. Significant enhancement in water-OMPs selectivity of PhACs and PFASs was observed. The mechanism lies in the effects of interlayer in improving the membrane permeance to water and meanwhile reducing the permeance to some OMPs by enhancing size exclusion effects. This work confirms the effectiveness of using TFNi membrane to simultaneously enhance the OMPs rejection and water permeance. The unraveled mechanism might inspire the future development of high-performance nanofiltration membranes targeting OMPs removal.
研究领域:
环境科学
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水处理
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膜技术
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Liyuan Wu,Pengpeng Guo,Xin Wang,Haiyan Li,Angzhen Li,Kaiyu Chen
Peroxymonosulfate (PMS) activation methods have attractive advantages in advanced oxidation process (AOPs) due to their powerful ability of directly or indirectly generating various reactive oxygen species (ROS). Herein, trace amount of Fe(III) ions were added into the commercial-CoS 2 /PMS system to improve the CoS 2 /PMS decomposition for organics removal. The organics removal efficiency could reach >90% towards methylene blue (MB), diclofenac sodium (DCF), sulfamethoxazole (SMX) and bisphenol A (BPA) in the CoS 2 /Fe(III)/PMS system, with the kinetic apparent rate constant k obs of 0.141, 0.206, 0.247 and 0.091 min −1 , respectively. The synergistic effect between Fe(III) ions and sulfur-vacancies on CoS 2 for PMS degradation were revealed for the first time in cobalt sulfides/PMS system. Quenching experiments and ESR analysis proved that 1 O 2 was the major ROS and was produced mainly by the hydrolysis of SO 5 • – . Besides, the high degradation efficiency was obtained by the contribution of SO 4 • – and • OH. Electron spin–resonance spectroscopy (ESR), cyclic voltammetry (CV) and Raman spectrum data revealed that the addition of Fe(III) ions could optimize the intensity of sulfur vacancies on the CoS 2 surface, which hindered the PMS reduction ability of Co(II), but accelerated the PMS oxidation to form 1 O 2 . The degradation path of MB was analyzed by liquid chromatograph-mass spectrometer (LC-MS). The mechanism studies speculated that the sulfur vacancies of CoS 2 provided the binding sites for Fe(III) ions with Co(II), which facilitated the PMS activation by Co(III).
研究领域:
环境化学
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催化
·
水处理
·
高级氧化过程
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Chenrui Liu,Yun Liu,Zhi Dang,Shuai Zeng,Chengcheng Li
In this paper, a kind of novel core-shell structured heterogeneous photo-Fenton catalyst, boron-doped reduced graphene oxide wrapped Fe 3 O 4 (Fe 3 O 4 @B-rGO) composite, was successfully synthesized by heating the mixture of Borane-Tetrahydrofuran adduct and graphene oxide wrapped Fe 3 O 4 (Fe 3 O 4 @GO) under reflux conditions. The core-shell structure of the catalyst had been confirmed by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photo electron spectra (XPS), and electron energy loss spectrum (EELS). The experimental results for Bisphenol A (BPA) degradation demonstrated that the as-prepared catalyst exhibited much higher photo-Fenton catalytic activity than Fe 3 O 4 and reduced graphene oxide wrapped Fe 3 O 4 (Fe 3 O 4 @rGO). Additionally, Fe 3 O 4 @B-rGO with mass concentration of doped boron at 9.3% exhibited the optimum catalytic property, in which system the BPA degradation kinetic rate constant was almost 1.96 times and 1.82 times of that in the systems with Fe 3 O 4 and Fe 3 O 4 @rGO, respectively. Finally, the mechanism analyses verified that OH, O 2 − and h + were the main reaction species in this system, and photo-electron generated by boron doped reduce graphene oxide (B-rGO) can accelerate the redox between Fe(II) and Fe(III). The excellent photo-Fenton performance, stability and magnetic separation properties make it promising for the degradation of organic compounds in waste water under visible light.
研究领域:
环境科学
·
材料科学
·
化学工程
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DOI
高影响因子
WATER RESEARCH
·
2022
·
IF 13.4
Siqi Liu,Andrey M. Kuznetsov,Weiqing Han,Alexei N. Masliy,Gregory V. Korshin
Methylated arsenic species are ubiquitous in the environment and resistant to removal by conventional treatment technologies. This study addressed this challenge based on the examination of the removal of dimethylarsinic acid (DMA) in a system that combines zerovalent iron (ZVI) and powdered activated carbon (PAC). The removal of DMA in the ZVI/PAC system was compared to that by coagulation, adsorption, electrochemical and Fenton oxidations, and other conventional methods. While only the electrochemical oxidation using a PbO 2 /Sb-SnO 2 /Ti anode allowed removing up to 60% DMA at several hours-long treatment times, the removal of DMA in the ZVI/PAC system containing 10 g/L ZVI and 2.5 g/L PAC with an initial pH of 2.0 was 95% for a 30 min reaction time. Specific roles of PAC, ZVI and its oxidation products in DMA removal were examined based on the spectroscopic data and quantum chemical modeling for the DMA/Fe(II) and DMA/Fe(III) systems. These methods demonstrated the formation of moderately strong DMA/Fe(II) and DMA/Fe(III) complexation. These results and relevant kinetic data were interpreted to indicate that the removal of DMA is governed by the rapid generation of Fe 2+ ions released as a result of accelerated ZVI corrosion in the galvanic ZVI/PAC microcells and ensuing formation of DMA/ Fe 2+ complexes that are readily adsorbed by PAC.
研究领域:
环境科学
·
化学工程
·
水处理
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产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 25
·2541-2548
·
IF 3.532
Lixia Su,Yonghuan Su,Bingqian Liu
A new ratiometric electrochemical strategy for immobilization-free detection of Escherichia coli (E. coli) was constructed by using a capture DNA-polyaniline/copper ferrite nanoparticles/graphene oxide (cDNA-PANI/CuFe2O4/GO) composite as capture probes, which has a high specific surface area and good magnetic properties. Then trigger DNA/Au nanoparticles (tDNA/Au NPs) were used as signal amplification labels, and Pt (IV) and Fe (III) were chosen as the signal probes. In the presence of targets, the sandwich format among cDNA-PANI/CuFe2O4/GO, E. coli and auxiliary DNA (aDNA) was realized by using the aptamer recognition system. Then, the tDNA/Au binding could be anchored on the sandwich format due to the principle of base complementation between unpaired aDNA and tDNA. And the unbounded tDNA of tDNA/Au NPs could bind an amount of Pt (IV). After separation using a magnet, a handful of unbound Pt (IV) which remained in the supernatant reacted with a large number of Fe (III) ions, leading to a markedly increased IFe(III)/IPt(IV) value. Oppositely, the sandwich format could not appear in the absence of targets, and even the tDNA/Au could not be immobilized on it. So, the redox reaction between a large amount of Pt (IV) residue in the supernatant and Fe (III) was significantly successful, causing a low IFe(III)/IPt(IV) value. Under optimal conditions, we found that IFe(III)/IPt(IV) was linearly related to the logarithmic E. coli concentration with a low limit of detection (1.862 × 103 cfu mL−1). This devised ratiometric electrochemical method may develop into a powerful and effective means for the detection of E. coli in real samples, which may also be developed as a universal tool for another microorganism.
研究领域:
分析化学
·
电化学
·
微生物学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yonghui Lei,Wendan Chen,Qiwei Lin,Fangjie Lin,Xuesong Wang,Hu Zhu
A Morchella-like hierarchical porous Fe-doping magnesium hydroxide (Fe(III)-PMH) was synthesized via a one-step hydrothermal process using iron-bearing brucite with the modulation of recyclable L-threonate. The L-threonate facilitated formatting Morchella-like porous structure through controlling specific lattice plane of Mg(OH) 2 . The as-prepared Fe(III)-PMH features a high specific surface area porous structure and even distribution of steady Fe(III) active sites doped in Mg(OH) 2 lattice, contributing to its degradation of amphoteric antibiotics or anionic dyes in the presence of H 2 O 2 . The surface alkalinity of Fe(III)-PMH drives the anionic conversion of amphoteric antibiotics or enhances the ionization of anionic dyes. Then these anionic contaminants are rapidly absorbed and oxidized in situ on the positively charged surface of Fe(III)-PMH. For the stable presence of superoxide radicals in Fe(III)-PMH/H 2 O 2 system, a wide range of working pH was obtained (pH 3–11). Moreover, a negligible amount of leached iron ions, and excellent reusability make it durable and promising for industrial applications. This work provides a simple and low-cost preparation of heterogeneous catalysts with good performance, especially for the highly effective enhanced Fenton-like system in the wastewater treatment of amphoteric antibiotics and anionic dyes.
研究领域:
环境科学
·
材料科学
·
化学工程
·
催化
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）