ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 26
·27063-27072
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IF 2.914
Wang Mengyun,Wang Daiyao,Qiu Shiyi,Xiao Junyang,Cai Huahua,Zou Jing
In this study, a sensitive and low-cost multi-wavelength spectrophotometric method for the determination of hydrogen peroxide (H 2 O 2 ) in water was established. The method was based on the oxidative coloration of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) via Fenton reaction, which resulted in the formation of green radical (ABTS •+ ) with absorbance at four different wavelengths (i.e., 415 nm, 650 nm, 732 nm, and 820 nm). Under the optimized conditions ( C ABTS = 2.0 mM, C Fe 2+ = 1.0 mM, pH = 2.60 ± 0.02, and reaction time ( t ) = 1 min), the absorbance of the generated ABTS •+ at 415 nm, 650 nm, 732 nm, and 820 nm were well linear with H 2 O 2 concentrations in the range of 0–40 μM ( R 2 > 0.999) and the sensitivities of the proposed Fenton-ABTS method were calculated as 4.19 × 10 4 M –1 cm –1 ,1.73 × 10 4 M –1 cm –1 , 2.18 × 10 4 M –1 cm –1 , and 1.96 × 10 4 M –1 cm –1 , respectively. Meanwhile, the detection limits of the Fenton-ABTS method at 415 nm, 650 nm, 732 nm, and 820 nm were respectively calculated to be 0.18 μM, 0.12 μM, 0.10 μM, and 0.11 μM. The absorbance of the generated ABTS •+ in ultrapure water, underground water, and reservoir water was quite stable within 30 min. Moreover, the proposed Fenton-ABTS method could be used for monitoring the variations of H 2 O 2 concentration during the oxidative decolorization of RhB in alkali-activated H 2 O 2 system.
研究领域:
分析化学
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环境科学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Jianjun Du,Hong Du,Xiangyu Li,Jiangli Fan,Xiaojun Peng
Aniline, a typical example of arylamines, is one of most important raw materials in many industries. However, arylamine-related pollution in waters threatens the public health and environment along with their wide applications. In this work, a simple, fast, and convenient colorimetric sensing system was presented for the arylamine (e.g. aniline) recognition in aqueous media. The system was presented using diazonium salt (DS) decorated gold nanoparticles (AuNPs), based on the classic coupling reaction of arylamine with diazonium salt. DS-AuNPs showed an excellent response and a good sensitivity to aniline, and the limit of detection reached 0.5 μM for aniline in this work. There was a good linear relationship (R2 = 0.997) between the values of A640 nm/520 nm and aniline concentrations over a range of 5–60 μM, which covered the Chinese standard of the maximum permissible pollutant emission concentration for aniline. The introduction of arylamine (e.g. aniline) caused a rapid and obvious red-to-blue color change, so the arylamine-polluted water could be qualitatively recognized by our naked-eyes and quantitatively measured by absorbance changes.
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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NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 44
·20575-20585
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IF 3.591
Xu Chu,Yan Cao
Silicon-hybrid carbon dots (Si–CDs) was synthesized using rice husk as a raw material via a carbonization and acid-cutting method. The as-prepared Si–CDs could be well dispersed in water and exhibits unique blue photoluminescence emission. Furthermore, the Si–CDs notably distinguished between four groups of trivalent rare earth elements ions (REEs). The fluorescence mechanisms behind this were likely due to not only the different fluorescence quenching effects of the REEs, but also that the Si–CDs could transfer the absorbed energy to Tb3+, Eu3+ and Dy3+ ions to enhance their characteristic fluorescence emission intensity. The fluorescence intensity ratio (F546/FSi–CD) exhibited a good linear relationship in the Tb3+ concentration range from 1 to 12 μM with a detection limit of about 3.24 nM, and performed satisfactorily in real water samples. In the meantime, a linear relationship was also achieved at wavelengths of 616 nm or 575 nm, correlated with the fluorescence intensity and concentrations of Eu3+ or Dy3+ in the ranges of 1–16 μM or 4–30 μM, and the detection limit achieved was 0.15 μM or 2.43 μM, respectively. Therefore, the as-prepared Si–CDs could be a potential material for the qualitative and quantitative fluorescent probing of REEs.
研究领域:
材料科学
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环境科学
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化学
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FOOD CHEMISTRY
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2020
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IF 6.306
Lijuan Huang,Liyun Wang,Zhiyong Nie,Yongan Wang
Rapid and precise detection of Tl + and Pb 2+ is important to prevent water poisoning and environmental pollution. Gold nanoparticles (AuNPs) have gained focus for heavy metal ion detection but cannot yet achieve accurate quantitative analyses when Tl + and Pb 2+ coexist. We propose a sensitive, flexible, and low-cost method for the qualitative and quantitative analysis of binary Tl + /Pb 2+ mixtures based on AuNP sensors. Partial least squares, back interval partial least squares and data fusion applied to analyze UV–Vis spectral data according to the AuNPs aggregation behavior, revealed discrete responses to the target analytes. The limits of detection for Tl + and Pb 2+ in the binary mixture were 5.23 and 1.76 nM, respectively, and good linear dependence was obtained. The method was successfully applied to the detection of both ions in tap and mineral water. This method can reveal water poisoning and environmental pollution events to ensure drinking water safety.
研究领域:
环境科学
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分析化学
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PubMed
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2018
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IF 2.88
Fengyuan Zhang,Xinyue Zhu,Zhijuan Jiao,Xiaoyan Liu,Haixia Zhang
An uncontrolled increase of nitrite concentration in groundwater, rivers and lakes is a growing threat to public health and environment. It is important to monitor the nitrite levels in water and clinical diagnosis. Herein, we developed a switch-off fluorescence probe (PyI) for the sensitive detection of nitrite ions in the aqueous media. This probe selectively recognizes nitrite ions through a distinct visual color change from colorless to pink with a detection limit of 0.1 μM. This method has been successfully applied to the determination of nitrites in tap water, lake water and Yellow River water with recoveries in the range of 94.8%–105.4%.
研究领域:
环境科学
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分析化学
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公共健康
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PubMed
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Analytical Methods
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2022
·Vol. 14
·期 45
·4669-4679
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IF 3.532
Lvcheng Liu,Yuqi Ling,Junshan Han,Tingting Hao,Xing Li
Solvated mercuric ions (Hg2+), a toxic and harmful water pollutant, can easily accumulate in organisms and cause serious damage to the kidney, liver, and central nervous system. To realize rapid and efficient detection of mercury (II) ions in water sources, a kind of new colorimetric sensor of gold nanoparticles (AuNPs) functionalized with ribavirin (Rib-AuNPs) was proposed and characterized by TEM, DLS, XRD, and UV-vis in this work. The color of the Rib-AuNP solution rapidly changed from wine-red to gray-blue with the addition of Hg2+ based on the aggregation mechanism. The limits of detection (LODs) are 0.20 μM by the naked eye and 3.64 nM by UV-vis spectroscopy with a fine linear relationship in the range of 0–0.25 μM (R2 = 0.9834) and 0.25–0.80 μM (R2 = 0.9893) of Hg2+, indicating that the detection system of Rib-AuNPs could be applied to analyze Hg2+ with excellent selectivity and anti-interference in real water samples.
研究领域:
环境科学
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分析化学
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纳米技术
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INORGANICA CHIMICA ACTA
·
2025
·
IF 3.2
Yun Cao,Shuo Zhou,Bei-Bei Yin,Yan Wang
This work successfully constructed a new three-dimensional coordination polymer [Zn(HEA)(L1)] n ( 1 ) based on o -phenylenediacetic acid (H 2 HEA) and 1,1′-(2,4,6-trimethyl-1,3-phenylene) bis(methylene) bis(1H-imidazole) (L1), demonstrating exceptional thermal stability and solvent resistance. The unique two-dimensional architecture of complex 1 features a distinctive “W”-shaped topology, assembled through the interconnection of nitrogen-rich and oxygen-containing coordination chains. These 2D layers subsequently extend into a three-dimensional framework via π–π stacking interactions and interlayer hydrogen bonding, creating a stable and porous network structure. As a multifunctional fluorescent probe, complex 1 exhibits remarkable sensing capabilities towards aqueous CrO 4 2− , Cr 2 O 7 2− , and Fe 3+ ions, and antibiotics including Ornidazole (ODZ) and Nitrofurazone (NFZ), with detection limits below 0.058 μM. Mechanistic investigations combining UV–vis absorption spectroscopy and density functional theory (DFT) calculations revealed that the fluorescence quenching originates from competitive energy absorption for metal ions, while a synergistic effect of photoinduced electron transfer (PET) and energy absorption accounts for antibiotic detection. Practical applicability was validated through real water sample analysis, achieving recovery rates of 97.3 %–103.7 % with relative standard deviations below 4 %. This study provides a new strategy for the simultaneous detection of multiple pollutants and expands the design principles for multifunctional fluorescent probes.
研究领域:
材料化学
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环境科学
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分析化学
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Micro & Nano Letters
·
2018
·Vol. 13
·期 1
·112-116
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IF 0.841
Yanling Hu,Chun Deng,Yu He,Yili Ge,Gongwu Song
The work develops a novel method for the detection of bisphenol A (BPA) based on glutathione (GSH)-protected silver sulphide quantum dots (Ag 2 S QDs), which was simple, fast, non-toxic, sensitive and selective. Ag 2 S QDs were synthesised with a sulphur–hydrazine hydrate complex as the S 2− source and GSH as the stabiliser. Ag 2 S QDs, near-infrared QDs, offered the advantages over lower background fluorescence and lower signal loss. The fluorescence peak of Ag 2 S QDs at 650 nm was quenched significantly in the presence of BPA. Good linear correlations were obtained over the concentration range from 0 to 60 μM of BPA under optimised conditions. The developed selective and sensitive method presaged more opportunities for the application in environmental samples.
研究领域:
环境科学
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分析化学
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纳米技术
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DOI
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JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Jinming Xu,Huangmei Zhou,Yixue Zhang,Yu Zhao,Hao Yuan,Xiaoxiao He,Ying Wu,Sanjun Zhang
In recent years, the prevention and control of water pollution has received extensive attention. There is a need to develop simple and effective strategies for the rapid detection of metal ions and dissolved organic matter (DOM) in order to improve water quality. To this end, the first copper nanoclusters (CuNCs)-based fluorescent sensor array was done to identify 12 metal ions (Pb 2+ , Fe 3+ , Cu 2+ , Cd 2+ , Cr 3+ , Co 2+ , Ni 2+ , Zn 2+ , Ag + , Fe 2+ , Hg 2+ , and Al 3+ ) and DOM (humic substances, lipids, fatty acids, amino acids, and lignans). The results revealed that CuNCs that were synthesized with polyethyleneimine (PEI), histidine (His), and glutathione (GSH) exhibited different binding abilities to metal ions and DOM. These unique fluorescence responses were analyzed using principal component analysis (PCA) and linear discriminant analysis (LDA) to identify metal ions and DOM in the buffer. The aforementioned 12 metal ions were classified at a limit concentration of 1.5 μM. Moreover, quantification of metal ions was achieved even at a low concentration of 0.83 μM (Zn 2+ ). This array also worked well in the recognition of metal ions in tap water as well as distinguishing riverine and seawater samples of different regions, which was of great significance in environmental monitoring.
研究领域:
环境科学
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分析化学
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生物化学
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PubMed
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Analytical Methods
·
2023
·Vol. 15
·期 16
·1953-1958
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IF 3.1
Piaotong Liu,Rusi Hao,Wenliang Sun,Junhui Li
As an important trace element in the human body, the concentration of Cu2+ has an important impact on the environment and human health, and its quantitative determination is of great significance in the fields of environmental protection and food safety. Here, a ratiometric fluorescent probe based on Tb(III)-functionalized UiO-66-type MOFs has been synthesized via a facile post-synthetic modification method by employing mixed linkers containing terephthalic acid and 2,6-pyridinedicarboxylic acid for Cu2+ detection. The blue fluorescence intensity at 440 nm from the ligands of MOFs does not change much with increasing Cu2+ concentrations and can be used as a reference signal, while the green fluorescence of Tb3+ can be rapidly and selectively quenched, causing fluorescence intensity at 547 nm to decrease. The probe can be used as a ratiometric sensor for Cu2+ detection with a good linear response and low detection limit. The use of the probe for the determination of Cu2+ in real water samples and drinks shows good practicality. This method for Cu2+ detection is simple, specific and visualized to meet the needs of environmental monitoring and food analysis and provides a new strategy for the construction of new copper ion fluorescent sensors to analyze complex samples.
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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PubMed
高影响因子
ACS Omega
·
2025
·
IF 4.3
Xinying Ni,Yile Wang,Mengping Zhang,Gengxin Cui,Xiao Meng,Wenwen Chen,Meng Jin,Hua Shao,Fang Zhang,Cuijuan Wang
Polycyclic aromatic hydrocarbons (PAHs) represent a class of carcinogenic, teratogenic, and mutagenic aromatic organic pollutants that are ubiquitous in the environment. The rapid and on-site detection of PAHs remains a challenge. This study proposes point-of-use (POU) surface-enhanced Raman spectroscopy (SERS)-based strategies for the qualitative and quantitative analyses of PAHs in environmental water and air. The results demonstrate clear correlations between the signal intensity and the logarithmic concentration of PAHs in water (ranging from 2.5 to 100 ppb), with satisfactory recovery and reproducibility. A similar trend was observed for PAHs on glass fiber filters modified with silver nanoparticles (AgNPs@GF filter). Specifically, the limits of detection (LOD) for fluoranthene, phenanthrene, and pyrene in water were 0.7, 1.0, and 0.1 ppb, respectively, while the LOD for fluoranthene, phenanthrene, and pyrene on the AgNPs@GF filter were 9.11, 18.18, and 14.59 ppb. Recovery rates in spiked real water and filters ranged from 83% to 126%, and the entire detection process was completed within 1 min. These findings highlight the significant potential of this method as a powerful tool for rapid on-site analysis of PAHs in various environmental matrices.
研究领域:
环境科学
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分析化学
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ACS Omega
·
2022
·
IF 4.132
Xiaolu Xiong,Chengwang Guo,Gengyang Yan,Bingxin Han,Zan Wu,Yueqian Chen,Shiqi Xu,Peng Shao,Hong Song,Xiyan Xu,Junfeng Han
Water quality guarantee in remote areas necessitates the development of portable, sensitive, fast, cost-effective, and easy-to-use water quality detection methods. The current work reports on a microfluidic paper-based analytical device (μPAD) integrated with a smartphone app for the simultaneous detection of cross-type water quality parameters including pH, Cu(II), Ni(II), Fe(III), and nitrite. The shapes, baking time, amount, and ratios of reaction reagent mixtures of wax μPAD were optimized to improve the color uniformity and intensity effectively. An easy-to-use smartphone app was established for recording, analyzing, and directly reading the colorimetric signals and target concentrations on μPAD. The results showed that under the optimum conditions, the current analytical platform has reached the detection limits of 0.4, 1.9, 2.9, and 1.1 ppm for nitrite, Cu(II), Ni(II), and Fe(III), respectively, and the liner ranges are 2.3–90 ppm (nitrite), 3.8–400 ppm (Cu(II)), 2.9–1000 ppm (Ni(II)), 2.8–500 ppm (Fe(III)), and 5–9 (pH). The proposed portable smartphone-app integrated μPAD detection system was successfully applied to real industrial wastewater and river water quality monitoring. The proposed method has great potential for field water quality detection.
研究领域:
环境科学
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分析化学
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