SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Rong Chen,Hui Liu,Man Tong,Lei Zhao,Peng Zhang,Deng Liu,Songhu Yuan
The interplay of Fe(II) oxidation and Fe(III) bio-reduction occurs widely in both natural and engineered redox-dynamic systems. This study aimed to unravel the impact of Fe(II) oxidation by O 2 in the presence of iron-reducing bacteria on subsequent Fe(III) bio-reduction. Mixed solutions of Fe 2+ (0.1–0.5 mM) and Shewanella oneidensis strain MR-1 (MR-1, 2.0 × 10 7 CFU/mL) at neutral pH were first exposed to laboratory air for Fe(II) oxidation and bacterial inactivation, and then the resultant Fe(III) suspensions were switched to anoxic conditions for bio-reduction by the surviving bacteria. In the oxidation step, the coexisting MR-1 was inactivated by 0.8–1.71 orders of magnitude within 60 min. In the subsequent bio-reduction step, the resultant Fe(III) was bio-reduced by the surviving MR-1. Bio-reduction of the resultant Fe(III) by the surviving MR-1 was 1.8–2.5 times faster than that of the Fe(III) that was produced from Fe 2+ oxidation without MR-1 by fresh MR-1 cells at 2.0 × 10 7 CFU/mL. Although MR-1 inactivation during Fe(II) oxidation may inhibit Fe(III) bio-reduction, the increase in bio-availability of the resultant Fe(III) and the residual reactivity of dead cells led to net enhancement of bio-reduction under the tested conditions. Lepidocrocite was the sole Fe(III) mineral that was produced from Fe 2+ oxidation without MR-1, while 19% ferrihydrite was produced from Fe 2+ oxidation in the presence of MR-1. The formation of low-crystallinity ferrihydrite accounts for the increase in bio-availability of the Fe(III) minerals. The findings of this study highlight an important but overlooked impact underlying the interplay of Fe(II) oxidation and Fe(III) bio-reduction.
研究领域:
微生物学
·
环境科学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Li Yang,Wei-Hua Zhang,Yan Li,Yan-Li An,Ye-Ming Wu,Ning Gu,Gao-Jun Teng
Noninvasive therapies such as photodynamic therapy (PDT) and chemodynamic therapy (CDT), which rely on reactive oxygen species (ROS), are gaining attention for their low toxicity. However, single-modal treatments have individual limitations that restrict the therapeutic efficacy. Fe(III) can coordinate with the hydrophilic regions of indocyanine green (ICG) molecules to form the ICG/Fe(III) complex, making it a promising dual-modal agent for combined PDT and CDT. However, coordination with Fe(III) leads to the aggregation quenching of ICG, hindering its application in dual-modal therapy. We innovatively utilize oxygen nanobubbles, prepared solely from water and oxygen, to significantly reverse the aggregation-induced quenching of the ICG/Fe(III) complex, thereby enhancing its stability in aqueous environments. In this system, Fe(III) assembles at the nanobubble interface, coordinating with ICG’s hydrophilic regions to form the ICG/Fe(III)-NBs. The oxygen nanobubbles boost PDT efficiency by improving the ICG/Fe(III) complex stability and oxygen content, while Fe(III) achieves CDT by generating hydroxyl radicals (•OH) through the Fenton reaction. This dual-modality treatment significantly disrupts the tumor’s redox balance, induces ferroptosis, and demonstrates strong antitumor efficacy, reducing tumor volume to 34% of its initial size in mice. The strategy offers a promising and clinically viable approach to cancer treatment.
研究领域:
肿瘤学
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药剂学
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生物医学工程
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DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 103
·期 1
·309-318
·
IF 2.606
Yu Yong,Shang Zhichao,Yang Zhongxiang,Wang Xiaohong,Feng Peizhong
The Fe(III)-doped BiOCl catalyst was successfully prepared via a one-step solution combustion synthesis (SCS), and they were characterized by XRD, FESEM, HRTEM, XPS, PL and DRS analysis. With the doping of Fe(III), the SCS catalysts become finer and more uniform, and show narrowed bandgap, which makes the Fe(III)-BiOCl can be excited to form photogenerated electrons and holes under visible light irritation and improve the photocatalytic performance. Compared with the SCS BiOCl, the FB1-2 sample exhibits doubled surface area (9.62 m 2 /g), narrowed bandgap (1.35 eV) and quadrupling degrading efficiency for Rhodamine B (RhB) (93% at 60 min). In addition, through the capturing of free radicals, the photocatalytic degradation mechanism of RhB was proposed, in which the active substances ∙O 2 − and h + played a leading role in the degradation process. Owing to the novel one-step combustion process and resulting in excellent photocatalytic performance, the Fe(III) doping BiOCl is demonstrated as a prospective catalyst for degrading dye pollutants.
Graphical abstract
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
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Shengpeng Liu,Gen Cheng,Yun Xiong,Yigang Ding,Xiaogang Luo
Due to strong activity, it is very difficult to remove low concentrations of bromide in medical wastewater by traditional method, thus highly effective and greener adsorbents should be utilized to design. In this work, the cellulose beads (CBs) were modified by the TEMPO-mediated oxidation and then bonded with Fe 3+ to fabricate Fe(III)-complexed carboxylated cellulose beads (Fe-CCBs) adsorbents. Structure and properties of Fe-CCBs were analyzed using Energy dispersive spectrum (EDS), Scanning electron microscopy (SEM), Fourier transform infrared spectrum (FT-IR), total acidity and basicity groups, X-ray diffraction (XRD), N 2 adsorption-desorption and Thermogravimetric (TGA). Moreover, batch adsorption experiments showed that the adsorption of Br − was better consistent with general-order kinetic model and Liu isotherm model, which could also further clarify the adsorption process mechanism. Meanwhile, the results revealed that removal of Br- was a spontaneous exothermic process and was more suitable to be carried out under neutral or acidic conditions. Furthermore, the mechanism of adsorption behavior of bromide ions on Fe-CCBs was based on a combination of electrostatic attraction and outer-sphere complexation. The results of this study can provide guidance for the design of novel material adsorbents and the removal of harmful anions from aqueous solutions.
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
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 30
·15797-15807
·
IF 8.867
Dan Zhao,Xiao-Hui Liu,Yue Zhao,Peng Wang,Yi Liu,Mohammad Azam,Saud I. Al-Resayes,Yi Lu,Wei-Yin Sun
Excess and deficiency of iron(III) and antibiotics from normal permissible limits will induce serious disorders, so their detection is important but challenging. In this work, by introducing a new amino triazole ligand N1-(4-(1H-1,2,4-triazole-1-yl)benzyl)-N1-(2-aminoethyl)ethane-1,2-diamine (L), a series of Cd(II)-based metal–organic frameworks (MOFs) [Cd3(BDC)3(DMF)2] (1), [Cd(L)(BDC)]2·2DMF·H2O (2), [NaCd2(L)(BDC)2.5]·9H2O (3), [Cd2(L)(2,6-NDC)2]·DMF·5H2O (4) and [Cd2(L)(BPDC)2]·DMF·9H2O (5) were synthesized. MOFs 1, 2 and 3 obtained under the same conditions with the same auxiliary ligand (H2BDC) but different amounts of alkali (NaOH) show distinct 3D, 1D and 3D framework structures, respectively, in which L and BDC2− exhibit varied coordination modes. 4 and 5 with 3D structures were isolated by using longer auxiliary ligands of 2,6-H2NDC and H2BPDC. The porosity and excellent fluorescence performance of 3, 4 and 5 make them potential luminescent sensors for Fe(III) and antibiotics. The results show that 3, 4 and 5 represent high sensitivity for the detection of Fe(III) ions with detection limits of 155 ppb for 3, 209 ppb for 4 and 297 ppb for 5 due to the existence of open channels and chelating NH2 sites. In addition, the strong emissions of 3, 4 and 5 can be quenched efficiently by trace amounts of NFs (nitrofurazone, NZF; nitrofurantoin, NFT; furazolidone, FZD) antibiotics even in the presence of other competing antibiotics such as β-lactams (penicillin, PCL). They are responsive to NZF with detection limits of 162 ppb for 3, 75 ppb for 4 and 60 ppb for 5.
研究领域:
化学
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材料科学
·
分析化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Meizhu Chen,Jia An,Yongqin Hu,Rubing Chen,Ying Lyu,Nan Hu,Mengfei Luo,Mengdi Yuan,Yufei Liu
Perovskite materials have shown great potential in various fields, such as photovoltaic devices, biomedical applications, and fluorescent probes. However, their hypersensitivity has significantly limited their practical application. In this paper, a modified swelling-shrinking strategy was adopted to encapsulate CsPbBr 3 perovskite quantum dots into poly(styrene/acrylamide) nanospheres, in order to create novel hyperstatic and hydrophilic perovskite polymer fluorescent beads. The results show that the fluorescence characteristics did not noticeably change when the polymer materials were dispersed in an aqueous solution over 12 months. Under harsher conditions (acid, alkali, PBS, DMEM, temperature), the novel perovskite polymers showed unprecedented fluorescence stability, which was then applied to the selective sensing of Fe(III) in real samples. The results show that a good linear relationship between 5 and 150 μM was obtained under optimal conditions, and the limit of detection was approximately 2.2 μM. Furthermore, the Fe(III)-sensing applications in Yangtze River water, human serum and tea water has been proven with satisfying results.
研究领域:
材料科学
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生物医学工程
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环境监测
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Pengfei Cheng,Zhipeng Lin,Xuqiang Zhao,Michael Gatheru Waigi,Galina K. Vasilyeva,Yanzheng Gao
Manganese oxides (Mn oxides) are ubiquitous and may coexist with Fe(III) ions in soil environments. In this study, acid birnessite , alkaline birnessite, cryptomelane, pyrolusite, manganite , and their Fe(III)-modified analogues were synthesized and used for benzo(a)pyrene transformation. Fe-modified Mn oxides show a markedly enhanced transformation capability towards benzo(a)pyrene. Specifically, the benzo(a)pyrene transformation rate constants k for Bir-H, Bir-OH, Cry, Pyr, and Man were 0.49, 0.080, 0.0071, 0.0055, and 0.0022 h −1 , respectively. After Fe(III) modification, the transformation rate constants were increased to 22, 2.7, 0.25, 0.0072 and 0.0098 h −1 , respectively. Fe(III)-modified layered birnessites exhibited better activity than Fe(III)-modified tunnel Mn oxides, which was attributed to their high Fe(III) contents and abundant active free radicals. Fe(III) was found to accept electrons from benzo(a)pyrene, thereby accelerating the benzo(a)pyrene transformation. Moreover, modification with Fe(III) increased the surface adsorbed water and oxygen, and promoted the generation of active free radicals. Finally, the physicochemical and biochemical properties of transformation products showed the environmental benefits of this process. Overall, the results indicate that the occurrence of Fe(III) ions could promote the removal of PAHs in Mn oxides-rich soils, and this study provides a credible understanding of PAH fates in natural soils.
研究领域:
环境科学
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土壤化学
·
污染物转化
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DOI
PubMed
高影响因子
Water
·
2024
·Vol. 16
·期 24
·3658
·
IF 3
Jialin Chen,Yi Xie,Jun Xia,Xiaolin Zhang,Dong Chen
An advanced photochemical reduction system involving the UV/Fe(III)–oxalate system was developed for the reduction of nitrate (NO3−) to harmless N-gaseous species, primarily nitrogen (N2), by carbon dioxide radical (·CO2−) generated in the presence of dissolved oxygen (DO). Electron paramagnetic resonance (EPR) analyses confirmed the presence of both ·CO2−and ·OH radicals. Systematic investigations were conducted on various operational parameters, such as the initial Fe(III) concentration, oxalate concentration, and pH levels, to assess their impacts on the efficiency and products of NO3−reduction. Notably, solution pH played a significant role in influencing the NO3−reduction efficiency and the final products. At pH 2, approximately 75% of NO3−was converted into N2with an 80% selectivity. In the pH range of 3 to 5, a remarkable NO3−removal rate of about 90% was achieved. Furthermore, higher concentrations of Fe(III) (2 mM) and oxalate (10 mM) were found to enhance NO3−removal to 91.95% and 88.71%, respectively. The presence of DO increased the oxidative potential in the reaction system, subsequently enhancing the selectivity conversion of NO3−to N2. In summary, the UV/Fe(III)–oxalate system exhibits significant potential for effective removal of NO3−while achieving high selectivity for the production of N2in water remediation applications.
研究领域:
环境科学
·
化学
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DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2022
·Vol. 32
·期 5
·1743-1754
·
IF 2.525
Xu Ouwen,Wan Shuyu,Yang Jing,Song Hanyang,Dong Luzheng,Xia Ji,Zhu Xiashi
In this work, an “on-off-on” fluorescent probe based on Ni-MOF functionalized Nitrogen-doped carbon quantum dots (Ni-MOF-NCDs) was developed. Ni-MOF-NCDs was characterized by FT-IR, TEM, SEM, and XPS. The presence of Fe (III) will reduce the fluorescence intensity of Ni-MOF-NCDs and “turn off” the fluorescence signal at emission peak of 390 nm, while the signal can be “turn on” after the addition of ascorbic acid (AA). The Ni-MOF-NCDs was established as an “on-off-on” fluorescent probe for the detection of Fe (III) and AA with the linear ranges of 0.029-8.0 µg/mL and 0.263-18.0 µg/mL, respectively. The method has been successfully applied to the detection of water samples and foods with satisfactory recovery. The experimental results showed that Ni-MOF-NCDs not only had the fluorescence properties of NCDs, but also had the adsorption performance of Ni-MOF.
研究领域:
材料科学
·
分析化学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Hao Xu,Qian Ye,Jing Zhang,Qiansong Li,Meijing Wang,Peng Zhou,Guanyu Zhou,Qingguo Wang
In response to the inherent restriction of low Fe(II) regeneration in the Fenton process, this study demonstrated a mutual-promoting configuration, where oxygen functionalized g-C 3 N 4 (OCN) was applied in Fe(III)/H 2 O 2 system to utilize mild natural solar light (SL) for persistent Fe(II) generation. The constructed OCN/Fe(III)/H 2 O 2 /SL system exhibited strong adaptability to various pollutants, and it well outperformed the g-C 3 N 4 (GCN) modified system and the traditional Fenton system in pollutants degradation efficiency. Compared with GCN, OCN could significantly promote the Fe(II) generation under solar light (SL), leading to more efficient H 2 O 2 activation. The characterization analyses revealed the larger surface area and enhanced charge separation of OCN, which were considered to take main responsibility for its enhanced photoactivity. The complexation of Fe(III) with the carboxyl groups of OCN also benefited the Fe(II) generation. ·OH was detected as the dominant radical responsible for metronidazole (MNZ) degradation, and its production in the OCN modified system was about twice that in the GCN modified system and the Fenton system. Moreover, the precipitation of FeO x on the OCN surface benefited the charge separation of the OCN, so that the improved OCN enabled a slight enhancement of MNZ degradation in the reuse experiments. The intermediates of MNZ degradation were analyzed based on the results of LC-MS, which provided insight into MNZ degradation pathways. This work highlighted the concept of self-improving photocatalyst, the ingenious combination of photocatalysis and Fenton-like system formed a mutual-promoting situation where the OCN and the Fenton-like system could both be improved, which endowed the configuration great potential for green and economical oxidation in environmental remediation.
研究领域:
环境科学
·
光催化
·
水处理
·
高级氧化过程
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Cheng Wang,Wenfeng Tan,Xionghan Feng
Iron-based sulfite (S(IV)) activation has emerged as a novel strategy to generate sulfate radicals (SO 4 •- ) for contaminants degradation. However, numerous studies focused on dissolved iron-induced homogeneous activation processes while the potential of structural Fe(III) remains unclear. In this study, five iron (hydr)oxide soil minerals (FeO x ) including ferrihydrite , schwertmannite , lepidocrocite , goethite and hematite , were successfully employed as sources of structural Fe(III) for S(IV) activation. Results showed that the catalytical ability of structural Fe(III) primarily depended on the crystallinity of FeO x instead of their specific surface area and particle size, with ferrihydrite and schwertmannite being the most active. Furthermore, in-situ ATR-FTIR spectroscopy and 2D-COS analysis revealed that HSO 3 - was initially adsorbed on FeO 6 octahedrons of FeO x via monodentate inner-sphere complexation, ultimately oxidized into SO 4 2- which was then re-adsorbed via outer-sphere complexation. During this process, strong oxidizing SO 4 •- and •OH were formed for pollutants degradation , confirmed by radical quenching experiments and electron spin resonance . Moreover, FeO x /S(IV) system exhibited superior applicability with respect to recycling test, real waters and twenty-six pollutants degradation. Eventually, plausible degradation pathways of three typical pollutants were proposed. This study highlights the feasibility of structural Fe(III)-containing soil minerals for S(IV) activation in wastewater treatment .
研究领域:
环境科学
·
化学
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DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2017
·
IF 1.815
Shiliang Wei,Kun Jia,Hongguo Shou,Xuefei Zhou,Pan Wang,Xiaobo Liu
Polyarylene ether nitrile (PEN) is traditionally used as high performance thermoplastics in various advanced engineering materials fields. However, the preparation of optically active PEN based materials, especially in aqueous solution, is still a great challenge. In this work, the side chain carboxylated PEN can be readily dissolved in alkaline solution but showing strongly quenched luminescence. Fortunately, the cationic surfactant of cetyltrimethylammonium bromide (CTAB) was able to recover the fluorescence emission of water soluble PEN, which can be subsequently quenched by Fe 3+ ions, leading to the selective determination of Fe 3+ ions in aqueous solution.
研究领域:
材料科学
·
分析化学
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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）