JOURNAL OF HAZARDOUS MATERIALS
·
2016
·
IF 4.836
Xiaojing Hou,Wenjuan Shen,Xiaopeng Huang,Zhihui Ai,Lizhi Zhang
Molecular oxygen activation by ferrous ions (Fe(II)) in aqueous solution could generate reactive oxygen species (ROS) with high oxidation potential via reaction between Fe(II) and oxygen molecules (Fe(II)/air), however, ROS yielded in the Fe(II)/air process is insufficient for removal of organic pollutants due to the irreversible ferric ions (Fe(III)) accumulation. In this study, we demonstrate that ascorbic acid (AA) could enhance ROS generation via oxygen activation by ferrous irons (AA/Fe(II)/air) and thus improve the degradation of rhodamine (RhB) significantly. It was found that the first-order aerobic degradation rate of RhB in the AA/Fe(II)/air process in the presence of ascorbic acid is more than 4 times that of the Fe(II)/Air system without adding ascorbic acid. The presence of ascorbic acid could relieve the accumulation of Fe(III) by reductive accelerating the Fe(III)/Fe(II) cycles, as well as lower the redox potential of Fe(III)/Fe(II) through chelating effect, leading to enhanced ROS generation for promoting RhB degradation. This study not only sheds light on the effect of ascorbic acid on aerobic Fe(II) oxidation, but also provides a green method for effective remediation of organic pollutants.
研究领域:
环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Jing Liu,Keyou He,Shengyin Tang,Ting Wang,Zhenghua Zhang
Coagulation-membrane filtration hybrid process has been widely applied in water treatment to improve water quality and alleviate membrane fouling. Herein, we systematically investigated the comparable effect of ferrate, ferrous and ferric pretreatment on fouling alleviation of ceramic membrane in reclaimed water treatment. Our results showed that the pretreatment of ferric, ferrous and ferrate remarkably alleviated membrane fouling with the fouling alleviation performance following the order: ferrate > ferrous > ferric > control. The t crit (subcritical fouling time) after which the fouling rate (dTMP/dt) became much more severe was remarkably extended from 0 (control) to 432 (ferric), 576 (ferrous) and 888 h (ferrate), respectively. Meanwhile, hydraulically reversible fouling resistance had the greatest contribution (58.3%) to the overall fouling resistance in the control case, however, hydraulically irreversible membrane fouling caused by inorganics ( R ir-citrate ) became more severe in long-term operation with the contribution of R ir-citrate to the total fouling resistance of 40.7%, 46.3% and 50.3% in the cases with ferric, ferrous and ferrate pretreatment, respectively. Moreover, the redundancy analysis results showed that the alleviated membrane fouling was principally owing to the sharp reduction of organic matters and the significant increase of particle size and particle concentration in influent. Compared with ferric and ferrous, ferrate had the best fouling alleviation performance, which was mainly due to its dual functions of chemical oxidation (including OH, Fe(V) and Fe(IV)) and coagulation (ferric oxyhydroxides).
研究领域:
环境科学
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水处理工程
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DOI
高影响因子
JOURNAL OF HYDROLOGY
·
2023
·
IF 6.4
Cui Gan,Zhaobo Luo,Chengyuan Su,Lei Tong,Hui Liu
Iron redox is often coupled with the degradation and conversion of co-existing organic pollutants, however, their co-transport behavior in hyporheic zone is not clear. In this study, the characteristics and mechanism of reactive co-transport of Fe 2+ and antibiotics during groundwater discharge were revealed by quartz sand column simulation. It was found that Fe 2+ inhibited the transport of three antibiotics sulfamethoxazole (SMX), ofloxacin (OFL), and oxytetracycline (OTC) in the quartz column, and the average inhibitory intensity was OTC (∼80%) > OFL (∼20%) > SMX (∼2%). Meanwhile, the content of dissolved oxygen in the column decreased from more than 7 mg/L to 3 mg/L. Fe 2+ transport in the column was promoted with the increase of OTC and OFL concentrations (2–50 mg/L), as Fe 2+ -OTC and Fe 2+ -OFL complexes inhibited the formation of lepidocrocite and induced Fe 2+ / Fe 3+ cycling during co-transport of Fe 2+ and OTC. In contrast, the interaction between SMX and Fe 2+ was not obvious due to the electrostatic repulsion. Due to the prevalence of Fe 2+ and antibiotics in groundwater system (especially with high antibiotic contamination), this study provides a new perspective on the potential environmental impacts of Fe and pollutants co-transport during groundwater discharge.
研究领域:
环境科学
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水文学
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微生物学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
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IF 5.091
Bisang Chen,Feiming Li,Liling Zou,Dejian Chen
Hydrogen bonding interactions guided supramolecular self-assembly has been widely studied, which played important roles in the field of nanotechnology and nanodevices. Herein, an effective intermolecular hydrogen bonding mediated heating-up synthesis of high-quality fluorescent carbon dots (CDs) is developed based on hydrogen-bonding between trimesic acid and urea. Upon optimizing the hydrogen-bonding interaction, high quality of CDs with high monodispersity and stability could be obtained. Besides, these CDs could be used for sensitive and specific detection of ferric ions. The novel strategy may pave a new way in molecular engineering for the fabrication of high quality of CDs.
研究领域:
纳米技术
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分析化学
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 47
·19819-19827
·
IF 2.7
Xiu-Juan Jiang,Rong-Gui Zhu,Chen-Xi Zhang,Bing Yang,Wen-Xia Yang,Ming-Xuan Jiang
In recent years, carbon dots (CDs), a type of new carbon nanomaterial, have been widely used. In this study, new fluorescent CDs were synthesized via a one-step hydrothermal synthesis using 2,3-dihydroxynaphthalene and sodium citrate as the carbon source. The results showed that the prepared CDs were significantly quenched by Fe3+ in aqueous environments, and a good linear relationship between the fluorescence intensity of the CDs and a low concentration of Fe3+ was observed. The detection limit of Fe3+ was 0.12 μM, the linear range was 0–4.69 μM and the recovery range of the sample detection was 84–111%. The new fluorescent CDs showed high sensitivity to Fe3+ in the presence of various metal ions and anions. These excellent characteristics promise extensive potential applications for our fluorescent CDs in aqueous environmental monitoring.
研究领域:
分析化学
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环境科学
·
纳米材料
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产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 24
·e202400499
·
IF 1.9
Jing Wang,Lu Ren,Chang Liu,Yanqi Liu,Yujie Shang,Yulu Zhang,Dawei Zhang
Graphical Two imidazole-based color-changing fluorescent probes 4-(4,5-bis(4-chlorophenyl)-1 H -imidazol-2-yl)- N , N -diphenylaniline (CIN) and 4-(4,5-di(furan-2-yl)-1 H -imidazol-2-yl)- N , N -diphenylaniline (FIN) were synthesized and characterized. The new probes CIN and FIN exhibit excellent selectivity and sensitivity towards Fe 3+ with relatively low detection limits and strong anti-interference properties. Both the probes CIN and FIN complexed 1 : 1 with Fe 3+ ion. Two imidazole-based color-changing fluorescent probes 4-(4,5-bis(4-chlorophenyl)-1 H -imidazol-2-yl)- N , N -diphenylaniline (CIN) and 4-(4,5-di(furan-2-yl)-1 H -imidazol-2-yl)- N , N -diphenylaniline (FIN) were synthesized and characterized. The new probes CIN and FIN exhibit excellent selectivity and sensitivity towards Fe 3+ with relatively low detection limits (0.26 μM and 0.10 μM) and strong anti-interference properties. Both the probes CIN and FIN complex 1 : 1 with Fe 3+ ion, and the complexation constants were 1.165×10 5 M −1 (CIN) and 1.899×10 5 M −1 (FIN), respectively. Moreover, CIN and FIN could be recycled by EDTA and could effectively monitor Fe 3+ ions at pH 4–10, which ensures the sensor‘s potential for detecting Fe 3+ in actual aqueous solutions. The probes were further applied to the detection of Fe 3+ in the actual reaction of Fe 2+ oxidation, and the filter paper and the probe solution are combined to make an indicator to detect Fe 3+ more conveniently and quickly.
研究领域:
化学传感器
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分析化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xinyu Zhang,Liuyi Ren,Shenxu Bao,Yimin Zhang
Various studies have shown that the presence of metal ions in the slurry can significantly impact flotation . However, it was still uncertain how iron, a typical metal ion, affected rutile flotation. Micro-flotation experiments, x-ray photoelectron spectroscopy , icp-oes, solution chemistry calculation, zeta potential and contact angle test were used to explore the effect of iron ions on the surface properties and floatability of rutile in this investigation. Micro-flotation results showed that iron ions not only substantially increased the rutile flotation recovery from 42.27 % to 75.69 % at pH = 4, but also converted the optimal pH of flotation from a point (pH = 4) to a platform (pH = 4–8). Solution chemistry calculations indicated that iron ions could form complexes with hydroxyl to produce FeOH 2+ , which reacted with benzohydroxamic acid (BHA) to create [Fe(C 7 H 6 NO 2 ) 2 ] + at pH=4–7. The analysis conducted through X-ray photoelectron spectroscopy , coupled with the results obtained from contact angle measurements, revealed that the complex [Fe(C 7 H 6 NO 2 ) 2 ] + had the capability to engage with Ti-OH groups, improving the hydrophobicity of rutile surface. Zeta potential analysis results further illustrated that Fe 3+ /BHA complexes reinforce the adsorption of BHA and iron ions onto rutile surface by the formation of [Fe(C 7 H 6 NO 2 ) 2 ] + . In addition, the O1s peak fitting results and ICP-OES analysis results proved that at the same pH, 60 mg/L was the optimal concentration for iron ion activation, which may be limited by Saturated adsorption capacity of [Fe(C 7 H 6 NO 2 ) 2 ] + .
研究领域:
矿物加工工程
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Panpan Xue,Huilan Zhuang,Sijie Shao,Hai Cai,Shumin Tang,Ying Sun,Xuemei Zeng,Shuangqian Yan
Abnormal copper and iron ion metabolism promotes tumor proliferation but also presents a potential target for cancer therapy. However, simultaneously modulating these two ions is challenging, and the downstream therapeutic mechanisms remain unexplored. Here, we introduce Fe ss TMiR, a biodegradable ionic nanoregulator designed to modulate copper and iron ion homeostasis for tumor treatment. Fe ss TMiR comprises ferrous ions and disulfanediyldiacetic acid-assembled nanovectors (Fe ss NV) combined with tetrathiomolybdate (TM), an anti-copper agent. Under the acidic and high-glutathione conditions of the tumor microenvironment, Fe ss TMiR decomposes into ferrous ions and TM, leading to elevated iron and reduced copper levels. Transcriptome analysis reveals that this dual ion modulation induces cancer cell death via ferroptosis, apoptosis, and autophagy by affecting multiple pathways, including metal ion metabolism, glutathione metabolism, and oxidative stress. Additionally, Fe ss TMiR inhibits angiogenesis and reduces the expression of programmed cell death ligand 1 (PD-L1). Notably, Fe ss TMiR elicits robust antitumor immune responses in breast tumor mouse models, including dendritic cell maturation, Treg cell reduction, and enhanced T cell tumor infiltration. This study underscores the potential of modulating iron and copper homeostasis in tumor therapy, enhancement of antitumor immune responses, and activation of ferroptosis.
研究领域:
肿瘤学
·
生物化学
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免疫学
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Zhichao Liu,Shengnan Wang,Wanying Li,Yang Tian
Iron ions, as a main component of intracellular labile iron, not only play an important function in oxygen transport, enzymatic reactions, and electron transport but also are vitally important in oxidative stress. In this work, we developed a ratiometric fluorescent biosensor for ferrous ion (Fe2+), in which gold nanoclusters (AuNCs) were synthesized as a stable fluorescent probe and a ligand (FeL) was designed for specific recognition of Fe2+ and conjugated onto AuNCs (AuNC@FeL). Meanwhile, water-soluble sulfocyanine 7 N-hydroxysuccinimide ester (Cy7 NHS ester) was immobilized onto AuNC@FeL as a reference element. The developed ratiometric fluorescent nansosensor displayed good linearity with the concentration of Fe2+ in the range of 1–105 μM, and detection limit was achieved down to 210 nM. In addition, this nanosensor responded to Fe2+ in less than 1.23 s and showed high selectivity against other metal ions, amino acids, and reactive oxygen species. With the advantages of high selectivity and accuracy, as well as quick response and long-term stability, this organic–inorganic ratiometric fluorescent probe was successfully applied in real-time biosensing and bioimaging of Fe2+ in neurons and HepG2 cells. By use of this tool, it was found that the increasing concentration of Fe2+ in live cells was closely related to oxidative stress.
研究领域:
生物成像
·
细胞生物学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Natural Fibers
·
2022
·
IF 3.507
Ying Ma,Qinfu Lu,Shanshan Lv
There is a continuous demand for a specific type of Chinese silk fabric, which is one of China’s national intangible cultural heritage items called Xiang-Yun-Sha. Xiang-Yun-Sha is silk fabric dyed using the vegetable dyes from a yam and the mud from the Pearl Delta River. The ingenious and sophisticated dyeing process inspires us to explore new dyes for silk. Through learning from the traditional mud dyeing process of Xiang-Yun-Sha, especially the contents of the mud, lignin and iron species are recognized as key factors. Yet little attention has been dedicated to lignin as a dye despite its wide applications. In this study, the feasibility of using lignin to dye silk is investigated using sodium lignosulfonate and alkaline lignin as model systems. Thanks to their advantageous polyphenolic features, such as stacking tendency and ability to form stable complexes with iron ions, lignin-related compounds show excellent performance in serving as dyes by themselves, as well as protective coatings for other dyes; the dyed silk fabric could inherit anti-ultraviolet property from lignin. Considering that iron is inexpensive and that leftover lignin is a vastly underutilized biomass resource, this study offers a promising strategy to exploit the enormous potential of these naturally occurring materials by developing high value-added products.
研究领域:
材料科学
·
纺织工程
·
生物质利用
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产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2018
·Vol. 410
·期 28
·7373-7384
·
IF 3.307
Shi Yi,Peng Jun,Meng Xiaoyan,Huang Tao,Zhang Jingyi,He Hua
Here, one kind of hydrophilic hydroxypropyl β-cyclodextrin cross-linked polymer (HP-CDP) was prepared and used to establish a “turn-on” fluorescent probe for selective determination of captopril in biological samples. The HP-CDP has been synthesized in one step by cross-linking (2-hydroxypropyl)-β-cyclodextrin (HP-β-CD) with a rigid aromatic group linker tetrafluoroterephthalonitrile (TFT), and the synthesis parameters of HP-CDP were optimized with water solubility, yield, and adsorption capacity as indicators. When it was used as a luminescent material, we have found an interesting phenomenon that the fluorescence emission of HP-CDP was quenched after forming a coordination compound with ferric ions, and then recovered after adding a certain concentration of captopril, since captopril can reduce the ferric iron to ferrous ions and cause ligand replacement. Based on this observation, a novel turn-on fluorescent method was developed for the determination of captopril. The method exhibited good linearity in the range of 9.2 × 10 −7 to 4.6 × 10 −4 M ( R 2 = 0.9982) and a low detection limit of 1.8 × 10 −7 M at optimum HP-CDP concentration, ferric ion concentration, pH, and incubation time. Moreover, interference experiments demonstrated that this fluorescence sensor had excellent selectivity that can commendably resist the interference from potential foreign substances. The proposed method has been successfully applied to determine captopril in human urine samples and may provide outstanding application potential in the future development of sensors. In addition, it is believed that HP-CDP also has a wide range of applications, for example, as a solubilizer, pollutant adsorbent, or drug carrier.
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研究领域:
分析化学
·
材料科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 22
·期 24
·8728-8733
·
IF 9.48
Qun Liu,Dan Pan,Tingting Ding,Mengchao Ye,Fengjiao He
The spent pickling solution, which comes from the pickling process of iron and steel, is indispensable in the manufacturing industry. Iron gets dissolved in the acid solution during the pickling process. When the concentration of metal ions in the acid solution accumulates to a certain value, it cannot to be used to wash iron and steel materials and becomes spent pickling solution that should be treated before discharge. At present, spent pickling solutions are treated via neutralization precipitation techniques in industries. This treatment method has a large discharge of wastewater, and the cost is high due to which it cannot meet the needs of green cycle in industry production. In this study, a new method, which is based on the formation of quaternary ammonium salt precipitate in a strong acid solution, is proposed to treat the spent pickling solution. The spent pickling solution was recycled and reused by precipitation separation of iron ion. The quaternary ammonium salt was recycled by dissolving the obtained precipitate in an alkali solution. The new ferric hydroxide precipitate formed and quaternary ammonium salt was returned to the solution. In the whole process, only a few amount of alkali was consumed. The removal rate of iron ion was up to 99.72%. Compared with the traditional neutralization precipitation method, the acid is not consumed and it can be reused; the alkali was consumed only for the precipitation of iron ions, not for the neutralization of the acid. The proposed method is an effective and economic method for the recovery of the spent pickling solution. It is expected to satisfy the requirements of green cycle and environmental protection in industry production.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）