RSC Advances
·
2016
·Vol. 6
·期 113
·112502-112511
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IF 3.289
Jiumei Wang,Jinquan Wan,Yongwen Ma,Yan Wang,Mengjie Pu,Zeyu Guan
MIL-88A was synthesized in diverse preparation conditions and characterized by various techniques. The catalytic performance of MIL-88A series for degrading Orange gelb (OG) through persulfate activation were also tested at temperature of 25 °C and the results were shown in the following sequence: 85 °C/2 h > 65 °C/2 h > 105 °C/2 h > 65 °C/6 h > 65 °C/12 h. MIL-88A produced at the synthesis temperature of 85 °C and in the crystallization time of 2 h (85 °C/2 h) was the best one with a removal rate of 96.4% mainly due to high SBET and much greater leach-out of Fe. An optimal dosage (0.3 g L−1) for MIL-88A in the MIL-88A/PS/OG system exists because of inhibition and promotion by fumaric acid. The filtrate experiment indicated that the catalytic activation involved heterogeneous reactions on the surface of the catalyst and homogeneous reactions in solutions. But the heterogeneous reaction occupied the principal position and the probable mechanism was obtained. Moreover, only solution pH < 4 could show a high degradation effect without the help of temperature. Comparing two different methods in the recycling experiment, the removal rate of OG decreased after the fourth run in both. Loss of active catalytic sites for Fe(III) in MIL-88A in the process of separating and sampling was responsible for activity decay.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Xueming Lin,Yongwen Ma,Jinquan Wan,Yan Wang,Yongtao Li
In this study, FeMoO 4 was applied to activate persulfate (PS, S 2 O 8 2− ) for azo dye Orange G (OG) degradation. The catalyst was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption-desorption isotherms. FeMoO 4 showed excellent efficiency in activating PS for OG removal. More than 95% could be removed after 40 min under reaction conditions of 4 mM PS, 0.3 g L −1 FeMoO 4 and 0.2 mM OG. The effect of different parameters (PS doses, FeMoO 4 doses and pH) were evaluated. The results showed that acid condition provided higher efficiency and overdosing FeMoO 4 and PS presented a scavenging effect. Major intermediates were identified and possible degradation pathway was proposed. Recycle tests presented that FeMoO 4 had excellent recyclable stability in activating PS for OG removal. Sulfate radicals and hydroxyl radicals all occurred in the oxidation reactions and the former came first. The oxidation reaction was involved in the translation of Fe 2+ /Fe 3+ occurred on the surface layer. This study revealed that the FeMoO 4 /PS system is a very promising method for degrading organic contaminants in the environment.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2024
·
IF 2.7
Rui Jiang,Jinfeng Wang,Bin Feng,Panpan Mou,Shuo Zhou,Xianbo Zhang,Yan Zhou,Guosong Chen,Donghai Lin
We have developed a novel fluorescence sensor based on upconversion nanoparticles (UCNPs) for the rapid and sensitive detection of trace aluminum ions (Al³⁺). The sensor utilizes the inner filter effect (IFE) between the UCNPs and the xylenol orange-aluminum complex (XO-Al³⁺), resulting in significant fluorescence quenching at 543 nm upon Al³⁺ binding. This quenching correlates directly with the Al³⁺ concentration, allowing for quantitative detection within a range of 0–30 µM and achieving an ultra-low detection limit of 0.19 µM. Selectivity of the sensor is enhanced by the incorporation of ascorbic acid, which masks interfering Fe³⁺ ions, thus ensuring accurate determination of Al³⁺ even in the presence of other metal ions. The UCNPs-XO sensor exhibits excellent stability, reproducibility, and minimal interference from commonly co-existing substances. This makes it suitable for the detection of Al³⁺ in various matrices, including food products and environmental water samples. Our work offers a significant advancement in Al³⁺ detection, with potential applications in food safety, environmental monitoring, and public health.
研究领域:
分析化学
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环境科学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2021
·Vol. 52
·期 3
·573-581
·
IF 2.8
Zhao Ruiyu,Wang Yi Mou,Li Jie,Meng Wenhua,Yang Chunli,Sun Chongxiang,Lan Xuefang
Ni, Ce, and Ta modified Ti/SnO 2 –Sb 2 O 5 –RuO 2 anodes were first prepared by thermal decomposition strategy and applied for Orange G degradation to explore the effect of Ni, Ce, and Ta modification on electrocatalytic property. The Ta modified anode showed the highest ·OH generation capability and the lowest charge transfer resistance among all samples, conducive to electrocatalytic degradation of Orange G. Besides, the Ta modified anode shows more cracks than Ni and Ce modified anodes, which is expected to create more specific surface areas and more exposed active sites for Orange G degradation. The degradation efficiency and the total organic carbon (TOC) removal rate increased in the order Ru < Ru–Ni < Ru–Ce < Ru–Ta, with Ru–Ta showing the highest degradation efficiency of 98.6% and 44.2%, much higher than 79.6% and 27.5% of Ru, respectively.
Graphical abstract
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Jing Deng,ShanFang Feng,Xiaoyan Ma,Chaoqun Tan,Hongyu Wang,Shiqing Zhou,Tuqiao Zhang,Jun Li
Highly ordered mesoporous MnFe 2 O 4 was fabricated via the nanocasting strategy and innovatively used to activate peroxymonosulfate for the degradation of Orange II in water. The effects of several key parameters including catalyst dosage, peroxymonosulfate concentration, temperature and initial pH on the degradation performance were investigated. Results showed that the catalytic activity of ordered mesoporous MnFe 2 O 4 was far superior than that of spinel MnFe 2 O 4 , which can be attributed to its unique structural characteristics. Data fitting showed that the Orange II degradation could be described by the pseudo-first-order kinetics under all conditions tested in this study. Ordered mesoporous MnFe 2 O 4 presented stable and excellent catalytic activity in wide pH range of 5–9. Both the increase of catalyst dosage and temperature favored the enhancement in catalytic efficiency. However, the Orange II degradation tended to have a decline trend after an initial ascent as the peroxymonosulfate concentration increased. Moreover, ordered mesoporous MnFe 2 O 4 was reusable over five consecutive cycles and negligible leaching of metal ions was observed during catalytic reaction. The balance among Mn 2+ /Mn 3+ , Fe 2+ /Fe 3+ and peroxymonosulfate decomposed in solution was considered as the proposed activation mechanism, and the generation of sulfate radicals played the dominant role in the Orange II degradation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2016
·
IF 3.698
Guoqiang Gan,Juan Liu,Zhixi Zhu,Ziran Yang,Conglu Zhang,Xiaohong Hou
In this work, magnetic nanoparticles (MNPs) Fe 3 O 4 /CeO 2 were firstly synthesized using three different preparation methods, including coprecipitation, impregnation oxidation-precipitation and impregnation reduction-precipitation, respectively. The catalytic activities of Fe 3 O 4 /CeO 2 MNPs, prepared by above three methods, were compared systematically in terms of the degradation of orange G (OG). The impregnation oxidation-precipitation process was economical and maneuverable due to the usage of air, no need of nitrogen protection and higher utilization efficiency of iron. Response surface methodology based on central composite design were used to investigate the individual and interactive effects of three process parameters on the OG degradation, i.e. the initial pH of the solution, the dosage of H 2 O 2 and the initial concentration of OG. Under the optimal conditions of pH 2.5, H 2 O 2 30 mM, OG 50 mg L −1 , catalyst 2.0 g L −1 and 35 °C, the degradation percentage of OG was 98.2% within 120 min, which agreed well with the modeling prediction (R 2 = 0.9984, and Adj-R 2 = 0.9969). And the degradation reaction well followed the first-order kinetic with R 2 = 0.9969. The Fe 3 O 4 /CeO 2 -OX MNPs showed high catalytic activity, stability and reusability in the degradation of OG.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
E-POLYMERS
·
2016
·Vol. 16
·期 2
·99-109
·
IF 0.812
Xiu-Juan Wu,Ji-De Wang,Li-Qin Cao
Novel chitosan/diatomite (CS/DM) membranes were prepared by phase inversion technique to remove anionic azo dyes from wastewater. The fabricated composite membranes exhibited the combined advantages of inorganic substances, diatomites, and polysaccharides. These composite membranes were characterized through Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction analysis. The mechanical properties of the membranes were also evaluated. Adsorption experiments were conducted under varied initial dye concentration, solution pH values, contact time, and adsorbent dosage. The results indicate that pH 3 is the optimal pH value for Orange G adsorption. The CS/DM membranes exhibit the highest adsorption capacity of 588 mg g -1 and removal rate of 94% under an initial dye concentration of 200 mg l -1 , contact time of 6 h, and membrane dosage of 8 mg. Langmuir, Freundlich and Redlich-Peterson adsorption models were applied to describe the equilibrium isotherms at different dye concentrations. The equilibrium data was found to be fitted well to the Redlich-Peterson isotherm. Pseudo-first-order and pseudo-second-order kinetics models were used to describe the adsorption of membranes. The adsorption data were well explained by pseudo-second-order models, and also followed by the Elovich model. In addition, these membranes display high adsorption capacity and mechanical performance even after reused for seven times.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 17
·7319-7332
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IF 4.5
Hou Zhaoping,Tian Zihan,Zhao Junming,Yang Xinhe,Liu Liangliang
Zeolite imidazole framework-8 (ZIF-8), serving as a promising adsorbent for wastewater treatment, is limited in practical wastewater treatment due to its polycrystalline powder form resulting in poor recoverability. Herein, the millimeter-scale ZIF-8@porous mullite beads were prepared by the seeded-secondary growth method. The surface of the porous mullite beads is fully encapsulated by nanoscale ZIF-8 crystals, and the ZIF-8 crystals are anchored by mullite whiskers. This composition provides ZIF-8 with a stable macroscopic structure and maintains the exposure of its adsorption sites. Therefore, the ZIF-8@porous mullite beads exhibited good adsorption performance toward methyl orange (MO) and orange G (OG) in the aqueous solution. The analysis of adsorption kinetics indicating the adsorption efficiency of ZIF-8@mullite-w on MO and OG is influenced by the concentration of adsorbates and the adsorption sites. The maximum adsorption of ZIF-8@porous mullite beads on MO and OG was 16.5289 and 5.111 mg/g, respectively.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lutong Bu,Shuangying Li,Linchun Nie,Liushan Jiang,Guangyu Dong,Denghao Song,Wenjing Liu,Xiaodie Geng,Dejing Meng,Qingxiang Zhou
In this study, nitrogen-doped carbon dots ( N -CDs) were facilely fabricated by one-pot hydrothermal method with levulinic acid and triethanolamine . A fluorescent sensor array was established for identifying azo compounds including Sudan Orange G (SOG), p-diaminoazobenzene, p-aminoazobenzene, azobenzene and quantitative detection of SOG. Experimental results revealed that azo compounds could quench the fluorescent intensity of N -CDs. Owing to various azo compounds showing different affinities to N -CDs, the sensor array exhibited different fluorescence quenching changes, which were further analyzed with principal component analysis to discriminate azo compounds. The sensor array was able to differentiate and recognize diverse concentrations of azo compounds from 0.25 to 2 mg/L. Simultaneously, a variety of factors affecting the detection of SOG were optimized. Under the optimized conditions, the sensor showed excellent stability and sensitivity. The sensor possessed marvelous linearity in the range of 0.1–1 mg/L and 1–4 mg/L and the detection limit was 27.82 μg/L. Spiked recoveries of 90.8–98.2 % were attained at spiked levels of 0.2 mg/L and 1 mg/L, demonstrating that the constructed fluorescence sensor was dependable and feasible for sensing SOG in environmental water samples.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Bao-Xu Jiang,Shuang-Bao Li,Ting-Ting Xu,Jian Li,Yu-Teng Zhang
Adsorption membranes have become a hot spot for wastewater treatment in recent years. Due to the lack of active sites in traditional inert materials such as polyvinylidene fluoride (PVDF) membranes, it is difficult to bind pollutants in water with high affinity. Therefore, in this study, ZrT-1-NH 2 /PVDF mixed matrix membranes (MMMs) were prepared by combining an amino-functionalized Zr-based metal–organic cage (ZrT-1-NH 2 ) with a polymer substrate via non-solvent-induced phase separation method for the efficient removal of Orange G (OG) from water. This method has many advantages such as simplicity in operation, high applicability, controllable MOFs loading. The structural characteristics and adsorption properties and of MMMs were also investigated through a series of characterizations and experiments. The result shows that in a 100 mL OG solution with an initial concentration of 50 mg/L and pH=3, M60 exhibited significant adsorption capacity, the removal efficiency reached 97.23 %, with an adsorption capacity of 64.18 mg/g, which is much higher than the pristine PVDF membrane. It is mainly attributed to electrostatic interactions and hydrogen bonding interactions between ZrT-1-NH 2 and OG molecules. This is consistent with the DFT calculations. The introduction of ZrT-1-NH 2 filler improves the performance of PVDF membranes and expands their potential applications.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Ying Li,Zhiquan Yang,Hongguo Zhang,Xiaowen Tong,Jinna Feng
An increasing amount of sewage sludge is produced by wastewater treatment plants worldwide. Therefore, the disposal of sewage sludge is one of the vital environmental issues currently. In the present work, we developed an alternative strategy of converting sewage sludge into porous activated carbon (SAC), and then synthesized a magnetically separable MnFe 2 O 4 -SAC heterogeneous catalyst through an environmentally friendly method. Several characterization techniques such as XRD, FTIR, SEM and XPS indicated the evidence of MnFe 2 O 4 nanoparticles successfully sticking to surface of porous SAC. The MnFe 2 O 4 -SAC composites exhibited stable and excellent catalytic activity in activating persulfate (PS) for the degradation of Orange G (OG) throughout the wide pH range of 3–9, and could be recycled by a magnet without any loss. The activation energy was calculated to be 14.94 kJ mol −1 , indicating that the OG degradation in MnFe 2 O 4 -SAC/PS process required moderate activation energy. The results of heavy metals leaching experiments revealed an excellent stability of the MnFe 2 O 4 -SAC catalyst. Possible reaction mechanism in MnFe 2 O 4 -SAC/PS system was also discussed in detail.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yan Li,Lingying Xie,Jingyi Liu,Sisi Tang,Hang Lei,Yuxia Zhong,Yue-Fei Zhang
In this study, an imidazole cross-linked chitosan hydrogel (I/CS-4) was synthesized through the Debus-Radziszewski reaction, resulting in a multifunctional adsorbent with both dye adsorption and antimicrobial capabilities. I/CS-4 effectively removed orange G (OG) and metanil yellow (MY) dyes under various environmental conditions, including pH, initial concentration, temperature, and contact time. The hydrogel demonstrated high stability and efficiency over a broad pH range (2−10), attributed to its abundant amino and imidazole groups, which facilitate electrostatic, hydrogen bonding, and π-π stacking interactions. The maximum adsorption capacities for OG and MY were 565.00 mg/g and 490.20 mg/g, respectively, following the Langmuir isotherm and pseudo-second-order kinetic models. Additionally, I/CS-4 showed excellent recyclability, maintaining over 80 % removal efficiency after five cycles. It also exhibited potent antibacterial activity against E. coli and S. aureus while being biocompatible. These results highlight I/CS-4's potential as an effective material for treating dye-containing wastewater, combining efficient contaminant removal with microbial inhibition.
研究领域:
环境科学
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材料科学
·
生物学
✓ 已验证
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）