Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Jingbo Wang,Xinyue Li,Yushan Lan,Hanyu Wang,Xiulan Ma,Hongbin Wang,Haoyu Xu,Huiqing Liu
The recontamination of farming wastewater with antibiotics and metal ions has emerged as a considerable concern in recent years. In this study, fly ash (FA) served as the adsorbent material, and its modified form (AFA) was developed via response surface optimization. The study involved an analysis of the structure and chemical composition of the fly ash before and after modification, both pre- and post-modification, through the use of scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) analyses. These analyses were aimed at exploring the adsorption mechanism of ciprofloxacin (CIP) in the presence of copper ion (Cu 2+ ) in livestock and poultry wastewater. The study indicates that the optimal modification parameters for AFA include an alkali-to-ash ratio of 1.5, a calcination temperature of 400 °C, and a 3-hour calcination period. At pH 6, AFA exhibited a markedly superior adsorption capacity for CIP in comparison to FA, with AFA achieving 19.32 mg/g and FA only 9.61 mg/g. The adsorption process conforms to the quasi-second-order kinetic model and Langmuir isothermal model.The adsorption capacity for CIP increases at low concentrations, specifically when Cu 2+ levels are below 100 mg/L. Nevertheless, elevated CIP concentrations impede the adsorption process. The adsorption of AFA for CIP is observed to decrease with rising temperature, in contrast to the adsorption of Cu 2+ , which increases as the temperature rises. The adsorption mechanism of AFA is primarily comprised of pore filling, ion exchange, electrostatic interaction, π bond coordination, complexation, and other similar processes.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2024
·
IF 2.8
Zhenghangcheng Li,Xueyu Feng,Kaijun Yuan,Xin-Xing Zhang
Complex formation of the copper(II) ion (CuII) with histidine (H) and H-containing peptides plays a crucial role in various metallo-enzymatic reactions. To elucidate the nature of coordinate bonding in CuII complexes, Fourier-transform infrared spectroscopy and 2D IR spectroscopy were employed to investigate the coordination geometries of CuII with diglycine, l-histidylglycine (HG), glycyl-l-histidine (GH), and glycylglycyl-l-histidine. The coordination of CuII to different peptide groups, including the peptide N- and C-termini, the amide group, and the imidazole of the H side chain, exhibits distinct spectral features. The derived molecular structure of the CuII–HG complex based on these spectral features significantly differs from that of CuII–GH, suggesting a preference of the N-terminus and the steric hindrance of the H side chain in CuII chelation.
研究领域:
生物化学
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结构生物学
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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
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IF 3.9
Yong Wang,Huan Zhou,Luohua Guo,Yun Qu,Qianfen Zhuang
Copper(II) ions (Cu2+) and disodium ethylenebis(dithiocarbamate) (nabam) are critical environmental pollutants, requiring rapid, sensitive, and selective detection methods. This work presents a photoresponsive colorimetric sensor using a carbon dot (CD) with oxidase-mimetic activity for dual detection of Cu2+ and nabam. Hydrothermally synthesized from 1,2,3,4-butanetetracarboxylic acid and o-phenylenediamine, the CD exhibits high ultraviolet light-driven oxidase-like activity due to its energy band alignment with the redox potentials of photocatalytic oxygen reduction and water oxidation, facilitating the generation of reactive oxidizing species (hydroxyl radicals, superoxide radicals, and photogenerated holes). These species oxidize colorless 3,3′,5,5′-tetramethylbenzidine to a blue product. Cu2+ detection is achieved via its suppression of the CD activity through CD–Cu complexation and valence band negative shifting, yielding a linear range of 0.01–0.5 μM and a detection limit (LOD) of 3.3 nM. Subsequent addition of nabam restores the CD activity by sequestering Cu2+ through complexation, enabling nabam detection with a linear range of 0.05–1.5 μM and a LOD of 23 nM. The sensor demonstrates high selectivity against potential interferents and is successfully applied to quantify Cu2+ and nabam in environmental water and wheat grain matrices. This study advances nanozyme-based sensing platforms by integrating photoresponse modulation and chelation chemistry for multiplex environmental monitoring.
研究领域:
环境科学
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分析化学
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材料科学
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2017
·Vol. 409
·期 27
·6421-6427
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IF 3.431
Li Daxiu,Xie Jiaqing,Zhou Wenjiao,Jiang Bingying,Yuan Ruo,Xiang Yun
The determination of the level of Cu 2+ plays important roles in disease diagnosis and environmental monitoring. By coupling Cu + -catalyzed click chemistry and metal ion-dependent DNAzyme cyclic amplification, we have developed a convenient and sensitive colorimetric sensing method for the detection of Cu 2+ in human serums. The target Cu 2+ can be reduced by ascorbate to form Cu + , which catalyzes the azide-alkyne cycloaddition between the azide- and alkyne-modified DNAs to form Mg 2+ -dependent DNAzymes. Subsequently, the Mg 2+ ions catalyze the cleavage of the hairpin DNA substrate sequences of the DNAzymes and trigger cyclic generation of a large number of free G-quadruplex sequences, which bind hemin to form the G-quadruplex/hemin artificial peroxidase to cause significant color transition of the sensing solution for sensitive colorimetric detection of Cu 2+ . This method shows a dynamic range of 5 to 500 nM and a detection limit of 2 nM for Cu 2+ detection. Besides, the level of Cu 2+ in human serums can also be determined by using this sensing approach. With the advantages of simplicity and high sensitivity, such sensing method thus holds great potential for on-site determination of Cu 2+ in different samples.
Sensitive colorimetric detection of copper (II) by coupling click chemistry with metal ion-dependentDNAzymes
研究领域:
生物化学
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分析化学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2018
·Vol. 42
·期 4
·3097-3101
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IF 3.201
Qiaoling Liu,Nan Zhang,Haoying Shi,Wenyan Ji,Xiaoqian Guo,Wen Yuan,Qin Hu
Highly fluorescent carbon dots (CDs) are prepared by a one-step microwave heating method using citric acid, L-cysteine and dextrin as the precursors. The average size of the CDs is 2.61 nm with good water dispersibility and photostability. Compared with undoped CDs, small amounts of nitrogen (N) and sulfur atom (S) co-doped CDs exhibit a red shift of the absorption spectra to the visible region and lead to a high quantum yield of 22%. Due to the large amount of carboxyl and hydroxyl groups (−COOH and −OH) on the surface of the CDs, Cu2+ is selectively detected in aqueous solution at pH 7.0 with a detection limit as low as 20 nM, which is much lower than the maximum concentration of Cu2+ in drinking water (∼20 μM) permitted by the US Environmental Protection Agency (EPA). Moreover, the application in tap water samples further demonstrates that the as-synthesized CDs are good candidates for the monitoring of Cu2+ in environmental water samples.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
FIBERS AND POLYMERS
·
2021
·Vol. 22
·期 7
·1844-1852
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IF 2.153
Zhang Hongnan,Yao Chenchen,Qin Xiaohong
Heavy metal copper ion pollution has enormously threatened ecosystem and public health. So, materials for detecting and adsorbing copper ions (Cu 2+ ) still remains challenging. Electrospinning nanomaterials have good application prospects in the field of water treatment because of its high specific surface area, high porosity and three-dimensional structure. Here, a visualized chitosan/polyacrylonitrile (CS/PAN) nanofiber membrane (NFM) was prepared via the amination modification of the electrospinning membrane and the doping of Cu 2+ fluorescent probe to adsorb Cu 2+ . The effect of membrane absorbs Cu 2+ in water was studied from the aspects of initial Cu 2+ concentration, PH and adsorption time. It was found that when the pH value of the Cu 2+ environment is 5–6, the weight gain rate of aminated nanofiber membrane is 46 %, and the adsorption time is 90 minutes, the adsorption capacity of the NFM can reach 164.3 mg/g. Then, rhodamine hydrazide derivatives were used as fluorescent Cu 2+ probes, which were added to the spinning solution to prepare new NFM to achieve selective recognition of Cu 2+ . The membrane can be used multiple times and can achieve gradient color development of different concentrations of Cu 2+ , and the detection limit can reach 10 −8 M.
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
MATERIALS SCIENCE FORUM
·
2019
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IF 0
Kai Bo Pan,Jing An,Bi Zhen Yuan,Xiao Dan Lv,Xiu Hua Huang,Bai Yang,Zhan Chen Cui
Fluorescent detection is a practical kind of methods to use in heavy metal ions detection technology. Carbonized Polymer Dots (CPDs) is good carbon-like material with low toxicity, green, ion-response. In this work, we successfully synthesized a yellowing fluorescent CPDs from folic acid. The luminescence intensity of CPDs decreased with the increase of copper ion content, and the detection limit was 0.44ppm.
研究领域:
分析化学
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环境科学
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产品关联
DOI
POLYHEDRON
·
2020
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IF 2.343
Yin-Jing Shen,Kun Zhang
In this paper, we design and synthesize an N -linked disalicylaldehyde H 2 Q j1 based on the economical substrates, and it is composed of two identical salicylaldehyde moieties with the intramolecular ESIPT character. During the process of sensing heavy metal ions, it is found that the ESIPT state of H 2 Q j1 can be rapidly (60 s) destroyed by Fe(III) and Cu(II), resulting in the turn-off fluormetric and colorimetric responses. Serial fluorescence and absorption titration experiments reveal that the H 2 Q j1 -Fe(III) and H 2 Q j1 -Cu(II) sensing systems are ratiometric and their corresponding coordination modes are 1:1 and 2:1. Especially, their LOD values are as low as 0.40 μΜ and 0.21 μΜ which are comparable to reported examples. Moreover, we also develop a convenient technique to detect Fe(III) and Cu(II) using paper-based sensing devices together with smartphone-based RGB analysis method which will rapidly provide the precise determination results, even in the tap water sample. Therefore, this bifunctional disalicylaldehyde H 2 Q j1 is taken as a useable platform to monitor Fe(III) and Cu(II) and offers some valuable lights for further optical probes.
研究领域:
分析化学
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光学传感
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DOI
高影响因子
Analytical Methods
·
2020
·Vol. 12
·期 32
·4058-4063
·
IF 2.596
Hao Guo,Xiaoqiong Wang,Ning Wu,Mengni Xu,Mingyue Wang,Longwen Zhang,Wu Yang
A novel composite (CDs@ZIF-8) based on carbon dots (CDs) and zeolitic imidazolate framework (ZIF-8) was successfully synthesized by encapsulating CDs into the pores of ZIF-8 through a simple one-pot solvothermal method. The as-synthesized CDs@ZIF-8 inherited simultaneously the strong adsorption capacity of ZIF-8 and the excellent optical properties of CDs. The composite exhibited excellent dispersibility and high structural and fluorescence stability in aqueous solution, which could be employed as an excellent turn-off mode fluorescent probe to detect Cu2+. The large specific surface area and strong adsorption properties of ZIF-8 enabled the resultant composite to effectively enrich Cu2+ for further improving the analytical sensitivity. The possible fluorescence quenching mechanism has also been discussed in detail and it was found that the effective fluorescence quenching of Cu2+ to CDs@ZIF-8 could be attributed to the strong ability of Cu2+ to combine with the carboxyl group or amino group on the CD surface and the strong adsorption capacity of ZIF-8; their synergistic effect resulted in effective fluorescence quenching.
研究领域:
材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2019
·Vol. 27
·期 1
·415-428
·
IF 3.917
Zhao Yushuang,Jing Shuangshuang,Peng Xinwen,Chen Zehong,Hu Yijie,Zhuo Hao,Sun Runcang,Zhong Linxin
Abstract Carbon dots (CDs), with high photostability, tunable excitation and emission wavelength, excellent biocompatibility, and environmental friendliness, attract great interest because of their promising applications in various fields. The synthesis of CDs from renewable biomass is especially attractive due to its sustainable and cost-efficient feature. However, one of the major problems for this route is the low yield of CDs. To overcome this issue, we propose a facile, universal, and highly effective synthesis method to prepare fluorescent CDs from various biomass hydrothermal carbons (HTCs). As compared with the current methods for synthesizing biomass derived CDs, our approach offers ultrahigh yield (42.5% based on the weight of biomass and 99.0% based on the weight of HTC) that is much higher than those obtained from other methods. The physiochemical properties of the as-prepared CDs can be tuned by reaction temperature. Furthermore, the PL quantum yield is high up to 16.6%, and is correlated with the surface chemical groups and conjugated π-domains of the carbon core in CDs. The fluorescence of CDs is effectively and selectively quenched by Cu 2+ , which enables CDs applying as fluorescent Cu 2+ nanoprobe with a linear range of 0–30 μmol L −1 and a detection limit of 85 nmol L −1 . Due to simple operation, mild condition, and low cost of the process, this method have a great potential in the large-scale synthesis and application of CDs from biomass. Graphic abstract
研究领域:
材料科学
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环境科学
·
化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Shuo Geng,Shu Min Lin,Nian Bing Li,Hong Qun Luo
As an important heavy metal ion, copper has the negative influence on otherwise healthy individuals, so establishing a valid way for the highly efficient, sensitive, and quantitative determination of Cu 2+ ion becomes an emergency in the environmental analysis. In the present work, water-soluble luminescent ZnO quantum dots (QDs) capped by polyethylene glycol (PEG) have been synthesized by a simple solution method. The PEG capped ZnO QDs (PEG@ZnO QDs) showed yellow fluorescence. High-resolution transmission electron microscopy, UV–vis absorption spectroscopy, Fourier transform infrared spectroscopy, and luminescence spectroscopy were applied to elucidate the properties of the PEG@ZnO QDs. In addition, the yellow fluorescence of the PEG@ZnO QDs was quenched when Cu 2+ ion was added to the PEG@ZnO QDs solutions. Therefore, a novel fluorescent probe was designed to detect Cu 2+ in water solution. The linear relationships were 10–200 nM and 2–10 μM, respectively, with the detection limit for Cu 2+ at 3.33 nM according to 3σ/slope (where σ denotes the standard deviation of the blank measures). The proposed sensor of the PEG@ZnO QDs has also been used in natural water samples to examine the availability of this method. In addition, the quenching mechanism was discussed, which may be attributed to the aggregation induced quenching.
研究领域:
环境分析
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材料科学
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分析化学
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DOI
高影响因子
Canadian Journal of Chemistry
·
2018
·Vol. 96
·期 12
·
IF 1.084
Guanhong Liu,Peipei Ren,Fan Yang,Xuekai Dou,Jun Wang,Youtao Song
Two novel isomeric colorimetric probes are established for simultaneous determination of copper ions using 2-hydroxy-5-methoxybenzaldehyde fluorescein hydrazone (5-HMBA-FH) and 2-hydroxy-3-methoxybenzaldehyde fluorescein hydrazone (3-HMBA-FH). They are synthesized by reacting fluorescein hydrazide with 2-hydroxy-5-methoxybenzaldehyde and 2-hydroxy-3-methoxybenzaldehyde, respectively, and then characterized by 1H-NMR, 13C-NMR, and infrared spectrum. The addition of copper ions to the solutions of two novel colorimetric probes can generate the obviously peaks at 498 nm in UV–vis absorption spectra along with a rapid colour change from colourless to dark yellow. The detection limits of the method for Cu2+ ion were 3.442 × 10−6 mol/L and 3.682 × 10−6 mol/L separately for 5-HMBA-FH and 3-HMBA-FH, respectively. The additions of other metal ions hardly affect the determination of copper ions. The proposed method was successfully applied to the analysis of Cu2+ ions in various samples. This method possesses high sensitivity, high simplicity, and minimized interference and will provide a great advantage in detecting copper ions in the environment, food, and medical applications.
研究领域:
分析化学
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环境科学
·
医学
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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）