TALANTA
·
2021
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IF 6.057
Jing Ru,Xuemei Wang,Xinglan Cui,Fangbing Wang,Hong Ji,Xinzhen Du,Xiaoquan Lu
Heavy metal pollution in the environment poses a serious threat to the ecosystem and human health, which has attracted widespread attention. In this study, an octahedral structure composite composed of UiO-66-NH 2 MOFs and semiconductor GaOOH materials has been prepared and used as electrode materials successfully. These composites can be used for the real-time and online determination of Cd 2+ , Cu 2+ , Hg 2+ , and Pb 2+ in real water samples simultaneously or alone via an electrochemical method. Zr-MOF has a large and unique surface area that is beneficial to the adsorption and preconcentration of heavy metal ions . The experiment parameters such as pH, deposition potential, and deposition time were optimized. Under the optimized conditions, the electrochemical performances and practical applications of Zr-MOF composites modified electrode have been investigated, which shows excellent wider linear range and lower detection limit (LOD). The results demonstrated excellent selectivity, reproducibility, stability and applicability for the detection of four metal ions. These superior features stem from the synergistic reaction mechanism of UiO-66-NH 2 and GaOOH. In addition, it has been established a new detection strategy for heavy metal ions through the form of metal-organic framework (MOF) composite in this work. It may provide a novel platform for the quantitative determination of heavy metal ions in various environmental samples.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Ruonan He,Junyi Yang,Shengjie Yuan,Ling Chen,Hongqiang Ren,Bing Wu
Real-time monitoring of estrogenic activity in the aquatic environment is a challenging task. Current biosensors face difficulties due to their limited response speed and environmental tolerance, especially for detecting wastewater, the major source of estrogenic compounds in aquatic environments. To address these difficulties, this study developed a single fluorescent protein (FP) -based whole-cell bacterial biosensor named ER-Light, which was achieved by inserting the sensing domain of the estrogen receptor (ER) into the FP Citrine and expressing it in the periplasm of Escherichia coli . As designed, ER-Light enables the detection of net estrogenic activity in mixtures, represented by estradiol equivalent concentration (EEQ). ER-Light detects EEQ in 40 s with a detection limit of 4.55 × 10 −7 μM and a maximum working range of 1.1 × 10 −4 μM, demonstrating sufficient response speed, sensitivity, and working range. In addition, the ER-Light can survive and tolerate wastewater effluent. Satisfactory recoveries (91.0 % to 102.1 %) eliminated concerns about the matrix effect of wastewater. EEQs (Not detected-2.9 ×10 −5 µM) measured by ER-Light from the effluent of 9 wastewater treatment plants validate its practicality in detecting wastewater. This is the first attempt to integrate ER into FP-based biosensors for environment monitoring. Our findings provide valuable design rules for real-time detection of bioactivity effects in the environment, contributing to the safeguarding of ecological and human health.
研究领域:
环境科学
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分子生物学
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生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
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IF 10.753
Xiao-Yi Wu,An-Qi Cui,Jun-Bin Ye,Gang Song,Yan-Ni Wu,Yue-Xi Wu,Jia-Ping Lai,Hui Sun
In consideration of the severe hazards of radioactive uranium pollution, the rapid assessment of uranium in field and in vivo are urgently needed. In this work a novel biocompatible and sensitive visual fluorescent sensor based on aggregation-induced emission (AIE) was designed for onsite detection of UO 2 2+ in complex environmental samples, including wastewater from Uranium Plant, river water and living cell. The AIE-active sensor (named as TPA-SP) was prepared with a “bottom-up” strategy by introducing a trianiline group (TPA) with a single-bond rotatable helix structure into the salicylaldehyde Schiff-base molecule. The photophysical properties, cytotoxicity test, recognition mechanism and the analytical performance for the detection of UO 2 2+ in actual water samples and cell imaging were systematically investigated. TPA-SP exhibited high sensitivity and selectivity toward UO 2 2+ as well as outstanding anti-interference ability against large equivalent of different ions in a wide effective pH range. A good linear relationship in the UO 2 2+ concentration range of 0.05–1 μM was obtained with a low limit of detection (LOD) of 39.4 nM (9.38 ppb) for uranium detection. The prepared visual sensor showed great potential for fast risk assessment of uranium pollution in environmental systems. In addition, our results also indicated that the TPA-SP exhibited very low cytotoxicity in cells and demonstrated great potential for uranium detection in vivo .
研究领域:
环境科学
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生物医学工程
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分析化学
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产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2017
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IF 7.78
Xing Lu,Yiwen Yang,Yanbo Zeng,Lei Li,Xiaohua Wu
Rapid and efficient detecting trace amount of environmental p -nitroaniline ( p -NA) is in urgent need for security concerns and pollution supervision. In this work we report the use of molecularly imprinted polymeric ionic liquid (MIPIL) microspheres to construct recognizable surfaces for detection of p -NA through fluorescence quenching . The p -NA imprinted microspheres are synthesized by precipitation polymerization upon co-polymerization of 3-(anthracen-9-ylmethyl)-1-vinyl-1H-imidazol-3-ium chloride (Fluorescent IL monomer) with ethyleneglycol dimethacrylate (EGDMA). The electron-rich group alkenyl imidazole in IL functional monomer can dramatically improve the emission of anthracene fluorophore and the π-π stacking, electronic, and hydrogen bond between p -NA and MIPIL can efficiently enhance the selective recognition force. The as-synthesized MIPIL microspheres present spherical shape, high fluorescence emission intensity and specific recognition, which showed rapid detection rate (1 min), stable reusable property (at least 4 time recycles), wonderful selectivity over several structural analogs, wide linear range (10 nM to 10 M) with a correlation coefficient of 0.992, and excellent sensitivity (LOD, 9 nM). As synthesis and surface functionalization of MIPIL microspheres are well established, the methods reported in this work are facile, rapid and efficient for monitoring p -NA in environmental wastewater.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2019
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IF 2.931
Hongwei Ren,Xue Wang,Ruiquan Gong,Meiyu Li,Hongyu Zhu,Jinfeng Zhang,Erhong Duan
Heavy metal ions in wastewater have brought serious environmental pollution. To improve the detection efficiency, it is important to find useful fluorescent probes . The emerging green natural deep eutectic solvents (NADESs) offer attractive option for “green” detection for its good biocompatibility, easy preparation, and high sensitivity. In this study, a multi-functionalized fluorescent probe with atomically dispersed EuCl 3 ·6H 2 O in amino acid-based NADESs ( l -Glutamic acid/Glycerol, l -Glu/Gly) was synthesized by metal-ligand coordination interactions with a mass ratio of 15:1. Combined with the NADESs and rare earth metal , the l -Glu/Gly/EuCl 3 ·6H 2 O could form the amino site and Eu 2+ site fluorescent centers. Under the excitation wavelength of 370 nm, it had dual emission peaks at 425 nm and 470 nm with efficient resonance energy transfer . The stable optoelectronic properties of l -Glu/Gly/EuCl 3 ·6H 2 O under external factors, such as mass ratio (13,1 to 18:1), temperature (30–50 °C), pH (1 to 14) and storage time ( >42 days), approved l -Glu/Gly/EuCl 3 ·6H 2 O an excellent fluorescence probe. In the application of water-quality monitoring, Fe 3+ and Cu 2+ could react with l -Glu/Gly/EuCl 3 ·6H 2 O in different reactive patterns. The blue fluorescence was quenched by Fe 3+ and enhanced by Cu 2+ , thus metal ions could be distinguished with high sensitivity. The detective process was determined and the fluorescent mechanism was also proposed. l -Glu/Gly/EuCl 3 ·6H 2 O fluorescent probe was demonstrated to be an efficient fluorescent probe for metal detection avoiding the hydrothermal process, and the cumbersome of ilter, dialysis, freeze drying.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Hongwei Ren,Yize Liu,Ruoyao Zhang,Yi Zheng,Tengda Zhao,Jing Han,Chunmao Chen,Erhong Duan
Naphthenic acids (NAs) are toxic components in refinery wastewater and in oil sands process water. The presence of NAs in aqueous environments would cause serious environmental problems. Development of a rapid method for screening and determination of trace NAs is urgent. In this work, a near-infrared fluorescence carbon quantum dots (CQDs) was successfully synthesized with p -phenylenediamine (PPD) and polyethylene glycol 400 (PEG 400) by the hydrothermal method. It showed a good fluorescence response to NAs with good detectability. The limit of detection was calculated to be 0.16 mmol‧L −1 , with a linear range from 0.5 to 15 mmol‧L −1 . The detection mechanism of NAs and CQDs was also proposed with in situ infrared spectrometer . This work provides new insights into the fluorescence detection of CQDs in the petrochemical industry, broadening the application of CQDs in the detection of environmental organic pollutants .
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Luping Feng,Lixiang Zhang,Yushuang Gong,Zhongling Du,Xi Chen,Xiaoyu Qi,Xiaoqing Zhang,Guojiang Mao,Hua Wang
C@MoS 2 nanocomposites with hollow nanotube structures were synthesized through the hydrothermal sulfuration of molybdenum precursor along with the carbonization of glucose. Interestingly, it was found that the so-obtained C@MoS 2 nanzymes could specifically exhibit much enhanced oxidase-like catalysis after the addition of Hg 2+ . Herein, carbon might not only play a role in accelerating charge transfer, but also conduct the synergistic effects with MoS 2 to provide more catalytic active sites of nanzymes as compared with pristine MoS 2 . Especially, the introduction of Hg 2+ could induce C@MoS 2 nanozyme to produce more quantities of highly oxidative superoxide radicals through the strong Hg-S chelation in the catalysis reactions, as confirmed by the electron spin-resonance spectroscopy, X-ray photoelectron spectroscopy, photoluminescence spectra , and radical capturing experiments. A catalysis-based colorimetric platform with C@MoS 2 nanozyme was thereby constructed for the quantitative analysis of Hg 2+ ions, showing linear responses to Hg 2+ in the range of 0.010–100 μM with the detection limit of 2.7 nM, which is lower than those of current analysis methods. More importantly, the proposed colorimetric assay could be applied for detecting Hg 2+ in environmental wastewater with the satisfactory detection recoveries, showing great potential applications for environmental monitoring, biomedical sensing, and food detection fields.
研究领域:
环境科学
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生物化学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Qihong Cai,Menglin Wang,Zhima Yangcuo,Xiaodan Zheng,Xinyi Zheng,Yaning Qin,Zhexiang Zou,Shiqi Zhang,Zhonghui Chen,Zhangxu Chen
In this study, a new first derivative synchronous fluorescence spectrometry (SFS) for the accurate and sensitive determination of pefloxacin (PFX) and fleroxacin (FLX) in wastewater was established. PFX and FLX were complexed with Al 3+ to significantly enhance their fluorescence intensity. Because the conventional fluorescence spectra of PFX-Al 3+ and FLX-Al 3+ overlap significantly, the wavelength difference (Δλ = 155 nm) was chosen for SFS scanning to narrow spectral band. And the narrowed synchronous fluorescence spectra was subjected to first derivative processing. Finally, the zero intersections of the first derivative synchronous fluorescence spectra at 281.6 nm and 273.6 nm were chosen for the determination of PFX and FLX, cleverly used of spectral parameters to eliminate the serious interference between PFX-Al 3+ and FLX-Al 3+ and the interference of wastewater background. The limits of detection of PFX and FLX were 0.0086 ng·mL −1 and 0.0068 ng·mL −1 with linear ranges from 0.1–40 ng·mL −1 and 0.2–80 ng·mL −1 , respectively. Recoveries of PFX and FLX in wastewater were 88.60 %–98.60 % and 90.00 %–95.60 %. The first derivative SFS established in this study used spectral separation instead of chromatographic separation, so that sample pretreatment was simple and the detection speed was fast. Compared the conventional method of HPLC, the test results of above two methods were close. And the new method had been successfully used for the determination of PFX and FLX residues in wastewater with good results. Therefore, the new first derivative SFS was expected to become a routine detection technology for PFX and FLX residues in wastewater and widely used.
研究领域:
分析化学
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环境科学
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药物分析
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
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IF 5.304
Yan-Hua Yuan,Hai-Xin Gu,Qi-Yuan Xie,Jun Zhang
Surface-enhanced Raman scattering (SERS) technology has been widely used in the field of environmental pollutant detection due to its fast and intuitive characteristics and low water interference. Herein, a low-cost and flexible SERS substrate was fabricated by transferring gold nanoparticles (NPs) onto polydimethylsiloxane (AuNPs@PDMS) membranes, which enabled highly sensitive detection of aromatic amine pollutants in wastewater after fire suppression. Finite time domain-difference calculations confirmed that the uniformly distributed NP gap significantly enhanced the localized electromagnetic field. The AuNPs@PDMS substrate performed satisfactorily in testing for rhodamine 6G (R6G) with a detection limit (LOD) of 5.5 × 10 −10 M. This substrate also demonstrated high reproducibility for detection of different concentrations of R6G and the relative standard deviation (RSD) was <7 %. These excellent SERS properties made AuNPs@PDMS a promising substrate in the detection of aniline and benzidine. Quantitative analysis of aniline and benzidine was achieved with LODs of 4.5 × 10 −9 and 7.8 × 10 −9 M, respectively. In addition, this substrate could be applied in rapid analysis of mixtures in wastewater after fire suppression using SERS without any complex pretreatments, displaying a great potential for rapid, high-sensitivity, and on-site detection of contaminants in fire-fighting sites.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2021
·
IF 6.057
Hui-Min Zhai,Bin Ji,Shan-Shan Tian,Fang Fang,Shuang Zhao,Zhi-Yong Wu
This work presents a new method of Cr speciation analysis based on micro sample pretreatment with a paper-based analytical device (PAD). By using electrokinetic separation and stacking on the PAD, Cr (VI) and Cr (III) can be separated and the recovered to achieve speciation analysis without have to be subjected to subtraction treatment. The separation and recovery properties of Cr (VI) and Cr (III) were characterized and optimized by UV–Vis spectrophotometry , with which the LOQ of 19.0 μg L −1 and 28.7 μg L −1 , and the recoveries of 88–108% and 90–110%, were obtained for Cr (VI) and Cr (III), respectively. In addition, direct analysis of Cr (VI)/Cr (III) from an electroplating wastewater sample was also demonstrated with this method combined with atomic spectroscopy (GF-AAS and ICP-OES). This sample pretreatment method is fast, cheap and easy to be used. Combined with the high sensitivity and elemental selectivity of atomic spectroscopy and mass spectrometry, this PAD sample pretreatment method could be a compensation to their lack in speciation discrimination, and may play an important role in the speciation analysis of Cr.
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
ANALYTICA CHIMICA ACTA
·
2018
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IF 5.123
Ran Hu,Rui Tang,Jiyang Xu,Feng Lu
Caffeine is a common pharmaceutical and personal care product pollutant in wastewater. This work offers rapid and single-step detection of caffeine in an aquatic matrix based on high performance surface-enhanced Raman scattering (SERS). Novel chemical SERS nanosensors were developed employing molecularly-imprinted polymer (MIP) particles loaded with Ag nanoparticles (AgNPs) using precipitation polymerization to form AgNPs@MIP nanocomposites. Theophylline was applied as a dummy template molecule in the synthesis process due to its high structural similarity with caffeine and greater availability. The nanocomposite was characterized by Fourier transform infrared spectroscopy(FTIR), X-ray diffraction(XRD), and ultraviolet-visible (UV-vis) spectroscopy. Static and kinetic adsorption testing demonstrated the specific affinity of AgNPs@MIP nanocomposites for caffeine and a rapid adsorption equilibration rate. Moreover, a simple solid phase extraction cartridge comprising AgNPs@MIP nanocomposites as adsorbents (AgNPs@MISPE), a syringe, and a removable microporous membrane were employed to detect the SERS signal of caffeine. The AgNPs@MISPE was used to detect caffeine with excellent uniformity (relative standard deviation, RSD = 4.8%) and good repeatability (RSD = 8.7%). The separation and detection processes were integrated into a single step, and the overall analysis time was 23 min. The detection limit was 100 ng L −1 , which is less than the caffeine content reported in many rivers. The experimental results demonstrate that the proposed chemical nanosensors are a low-cost and reliable tool for the rapid screening of caffeine in wastewater or other aquatic matrices.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2018
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IF 4.244
Linlin Xu,Hua Zhang,Yue Tian,Anxin Jiao,Feng Chen,Ming Chen
The prospect of wielding surface-enhanced Raman spectroscopy (SERS) as a powerful technique for ultrasensitive detection of organic molecules in wastewater has received extensive attention in environmental surveillance. Based on ultraviolet (UV, 405 nm) laser irradiation of ZnO nanorods in HAuCl 4 solution, ZnO@Au nanorods with controllable Au nanoparticles were successfully fabricated and established as an advanced SERS-based substrate. The reduction of Au ions was driven by the generation of electron-hole pairs via UV laser excitation of semiconductor-based nanomaterials , resulting in the moderate overgrowth of Au nanoparticles on the ZnO nanorods. The Au composition-dependent SERS analysis of crystal violet (CV) molecules revealed that the ZnO@Au nanorods with 16.21% Au contents exhibited optimized SERS activity in comparison with other nano-substrates in this paper. Furthermore, the detection limit of light-resistant methyl blue (MB) dye molecules was achieved at nanomole (nM) level of 10 −9 M (0.8 μg/L), providing ultrasensitive detection of organic pollution in wastewater. Even after twenty recycles, the excellent reusability of this novel substrate with 65% original SERS intensity was achieved by subsequently eliminating the residual MB molecules via photocatalytic degradation. Therefore, the as-prepared ZnO@Au nanorods can serve as a cost-effective, clean, reusable and active SERS substrate for ultrasensitive monitoring of light-resistant organic pollutant in natural ecosystems.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）