Journal of Environmental Sciences
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2024
·
IF 5.9
Yongli Liu,Xiaoyan Su,Huanjia Liu,Guifen Zhu,Guobei Ge,Yuxin Wang,Penghui Zhou,Qingxiang Zhou
In present work, blue carbon dots (b-CDs) were derived from ammonium citrate and guanidine hydrochloride, and red carbon dots (r-CDs) were stemmed from malonate, ethylenediamine and meso‑tetra (4-carboxyphenyl) porphin based on facile hydrothermal method . Eco-friendly ratiometric fluorescence probe was innovatively constructed to effectively measure Hg 2+ utilizing b-CDs and r-CDs. The developed probe displayed two typical emission peaks at 450 nm from b-CDs and 650 nm from r-CDs under the excitation at 360 nm. Mercury ion has strong quenching effect on the fluorescence intensity at 450 nm due to the electron transfer process and the fluorescence change at 450 nm was used as the response signal, whereas the fluorescence intensity at 650 nm kept unchangeable which resulted from the chemical inertness between Hg 2+ and r-CDs, serving as the reference signal in the sensing system. Under optimal circumstances, this probe exhibited an excellent linearity between the fluorescence response values of ΔF 450 /F 650 and Hg 2+ concentrations over range of 0.01–10 µmol/L, and the limit of detection was down to 5.3 nmol/L. Furthermore, this probe was successfully employed for sensing Hg 2+ in practical environmental water samples with satisfied recoveries of 98.5%–105.0%. The constructed ratiometric fluorescent probe provided a rapid, environmental-friendly, reliable, and efficient platform for measuring trace Hg 2+ in environmental field.
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
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2020
·Vol. 167
·期 6
·067503
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IF 3.721
Xiao-Zhen Feng,Huifang Li,Annaleizle Ferranco,Zhencheng Chen,Mingyue Xue,Guo-Cheng Han,Zhiliang Jiang,Heinz-Bernhard Kraatz
The detection of bisphenol A (BPA) was carried out using several simplified electrochemical sensors in which electroactive materials Heme, dopamine (DA), β-cyclodextrins (β-CD) or Fc-ECG were deposited on screen-printed electrodes (SPEs) through one-step. The preparation of the developed sensors were verified by SEM, CV and DPV. Results shown that Heme/SPE sensor demonstrated notable electro-catalytic capabilities and a greater current response than other sensors for BPA detection and optimal operating conditions were determined. The current response vs concentration of BPA showed a linear relationship in the range of 0.05–0.50 μmol·l−1, the concentration limit of detection (S/N = 3) as 5.0 nmol·l−1 and 0.0013 μA·μM−1·cm−2 as the sensitivity of detection. There were no interferences arising from common elements that relate to BPA. Heme/SPE was applied for BPA detection in bottle drinking water, tap water and lake water; findings showed a total R.S.D. of less than 3.1% and average recovery from 95.0 to 104.0%. These results showed that the actual application of BPA detection was rapid and precise when placed in environmental water and even useful for safety verification.
研究领域:
分析化学
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环境科学
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生物医学工程
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DOI
高影响因子
WATER RESEARCH
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2021
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IF 11.236
Huiwen Cai,Mengdi Chen,Fangni Du,Sara Matthews,Huahong Shi
Nanoplastics are an emerging contaminant in aquatic environments. However, analytical methods for the separation, concentration, and identification of nanoplastics, which are essential to assess nanoplastic presence in the environment, are lacking. Here, we developed a new and easy-to-use method to separate and enrich nanoplastics in field water samples with ultracentrifugation. River water was spiked with polystyrene fragments (< 1000 nm) at an environmentally relevant concentration (10 8 –10 9 particles/L). The polystyrene fragments were successfully separated and enriched by a factor of nearly 50 times with a high recovery rate (87.1%) after undergoing our process. Particles were then characterized using UV-vis spectroscopy, scanning electron microscopy (SEM), and enhanced darkfield microscopy with a hyperspectral imaging (HSI) spectrometer. These techniques are non-destructive and allow the assessment of plastic concentration, morphology, and polymer type. Our method can potentially be applied to other water samples to supply clean, enriched nanoplastic samples that can facilitate their identification in environmental samples.
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
SENSORS
·
2023
·Vol. 23
·期 6
·3094
·
IF 3.9
Jinglong Han,Huajun Liu,Ji Qi,Jiawen Xiang,Longwen Fu,Xiyan Sun,Liyan Wang,Xiaoyan Wang,Bowei Li,Lingxin Chen
Traces of mercury ions in environmental water can harm humans and animals. Paper-based visual detection methods have been widely developed for the rapid detection of mercury ions; however, existing methods are not sensitive enough to be used in real environments. Here, we developed a novel, simple and effective visual fluorescent sensing paper-based chip for the ultrasensitive detection of mercury ions in environmental water. CdTe-quantum-dots-modified silica nanospheres were firmly absorbed by and anchored to the fiber interspaces on the paper’s surface to effectively avoid the unevenness caused by liquid evaporation. The fluorescence of quantum dots emitted at 525 nm can be selectively and efficiently quenched with mercury ions, and the ultrasensitive visual fluorescence sensing results attained using this principle can be captured using a smartphone camera. This method has a detection limit of 2.83 µg/L and a fast response time (90 s). We successfully achieved the trace spiking detection of seawater (from three regions), lake water, river water and tap water with recoveries in the range of 96.8–105.4% using this method. This method is effective, low-cost, user-friendly and has good prospects for commercial application. Additionally, the work is expected to be utilized in the automated big data collection of large numbers of environmental 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
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yali Wang,Shuangbo Zhang,Jiang Bian,Joseph Brake,Chaoyang Luo,Chuanwen Sun,Xiaobin Wu
Mercury has caused severe harm to the environment and human health. A novel biological screen method was developed and identified a Hg 2+ chelator BDTH2. Both biological and chemical methods demonstrated BDTH2 displayed a high specificity and strong binding capacity for Hg 2+ . Toxicological experiments of BDTH2 demonstrated its good safety. To enhance the sensitivity, functional composite BDTH2-AuNPs were synthesized, and the system exhibited strong specificity to Hg 2+ and excellent anti-interference capabilities. The optimized colorimetric method and the paper test strip method showed a visual detection limit of 3 nM less than 30 s and 5 nM within 1 min respectively. This system was evaluated for detecting spiked Hg 2+ concentrations in environmental water and six agricultural food samples and showed high consistence with those of ICP-MS. Therefore, this study provides a novel, rapid, and economical method for on-site detecting of Hg 2+ in water and agricultural products.
研究领域:
环境科学
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分析化学
·
毒理学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 18
·7874-7878
·
IF 1.821
Yaping Zhong,Qingpu Wang,Yu He,Yili Ge,Gongwu Song
We developed a simple and sensitive room-temperature phosphorescence (RTP) method for the determination of graphene oxide (GO) in environmental water samples using amino-functionalized silica-encapsulated Mn/ZnS quantum dots (Mn/ZnS@SiO2-NH2) as a phosphorescent probe. The maximum phosphorescence excitation and emission wavelengths of the synthesized Mn/ZnS@SiO2-NH2 nanoparticles were 320 nm and 595 nm. The RTP intensity of the Mn/ZnS@SiO2-NH2 nanoparticles could be quenched in the presence of GO with a detection limit as low as 1.0 mg L−1. Good linear correlations were obtained over the concentration range from 0 to 10.0 mg L−1 with a correlation coefficient of 0.9987, and 10.0 to 25.0 mg L−1 with a correlation coefficient of 0.9979. The phosphorescence quenching mechanism was also discussed. This method was successfully applied to the determination of GO in environmental water samples which allows more opportunities for its application in biological and environmental systems.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
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IF 5.1
Yinghua Zhu,Youduo Zhao,Jingjing Deng,Tianshu Zhou
The widespread application of neomycin (NEO) has raised pollution problem caused by the accumulation of its residues, which poses potential risk to human health and ecological safety. Therefore, the development of sensitive and reliable approaches is crucial for detecting and monitoring low levels of NEO in complex samples. In this study, an innovative spherical nucleic acid (SNA) based sensor was designed for the selective detection of NEO. The colorimetric response was attributed to hydrogen bonding, electrostatic interaction, and coordination between the SNA and NEO. Meanwhile, the fluorescence of FAM-labeled SNA was quenched by NEO due to fluorescence resonance energy transfer (FRET) effect. By integrating visual colorimetry and fluorescence analysis, the dual-responsive sensor enabled rapid, selective, and sensitive determination of NEO, with detection limits of 40.0 nM and 3.3 nM, respectively. Furthermore, the SNA exhibited good salt tolerance, maintaining stability without aggregation even in high-salt conditions. The average recoveries for detecting NEO in water samples analysis ranged from 97.6 % to 108.7 %, confirming its reliability and accuracy in practical applications. This work provides an effective strategy for NEO detection and expands the potential applications of SNA in environmental monitoring and pollution control.
研究领域:
生物化学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Water Reuse
·
2024
·Vol. 14
·期 1
·39-50
·
IF 4.3
Huang Yiru,Li Youyou,Zhong Qingwei,Luo Chen
View large Download slide View large Download slide Close modal Metal-organic framework (MOF) materials, characterized by their porosity and large specific surface areas, exhibit excellent adsorption properties. With the aim of removing Te(IV) from environmental aquatic systems, this study is the first to propose the use of MIL-100(Fe). The material reveals a strong adsorption capacity for Te(IV), with maximum adsorption of 531.9 mg/g, superior to other adsorbent materials. Adsorption isotherm and kinetic models indicate that the adsorption process primarily involves monolayer chemical adsorption. According to the thermodynamic parameters, the adsorption reaction is endothermic. The experiment individually examined factors affecting the material's adsorption performance, including adsorbent dose, initial concentration of Te(IV), pH, adsorption time, and coexisting ions. Even under high ion strength conditions and high concentrations of coexisting ions, the material's adsorption efficiency for Te(IV) still reached over 94%. The material has been successfully applied to remove Te(IV) from lake water, river water, and seawater, yielding satisfactory results. Due to the high salinity and ionic strength of the solution, the removal efficiency of Te(IV) in the seawater matrix was slightly lower than that in freshwater (river and lake water). Thus, this material shows promise for the removal of Te(IV) from complex aquatic systems. MIL-100(Fe) was prepared and characterized. The Te(IV) can be adsorbed by MIL-100(Fe) effectively, and the adsorption process was primarily a monolayer chemical adsorption and an endothermic reaction. The Te(IV) can be removed effectively in environmental water supplies by MIL-100(Fe).
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
Analytical Methods
·
2021
·Vol. 13
·期 26
·2943-2950
·
IF 2.896
Xinyi Li,Bingzhi Li,Min Chen,Mengmeng Yan,Xiaolin Cao,Jungang Yin,Ziping Zhang
In this paper, magnetic zeolitic imidazolate framework-8 composites were synthesized by a simple in situ method and then used for the first time as an adsorbent in magnetic solid-phase extraction for extracting multiple strobilurin fungicides. The magnetic composites were characterized in detail. The results showed that Fe3O4 nanoparticles were attached on the surface of zeolitic imidazolate framework-8 with a uniform particle size of 150–200 nm and that the magnetic composites possessed a perfect molecular transfer rate towards strobilurin fungicides. The parameters of the magnetic solid-phase extraction process, including solution pH, adsorption time, solution volume, elution solvent, and elution volume, were investigated. Under the optimum conditions, the recoveries of all five fungicides fell within the range 80.8–109.0% with spiking levels of 10, 20 and 50 ng mL−1. A magnetic solid-phase extraction-high performance liquid chromatography-tandem mass spectrometry method based on the magnetic composites was established and confirmed to be simple, time-efficient and highly sensitive.
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
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2018
·Vol. 410
·期 25
·6643-6651
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IF 3.307
Chai Mengsa,Chen Yihui,Xuan Rongrong,Ma Junfeng,Jin Zhenfeng,Wang Tingting,Qiu Dan,Zhang Lihua,Zhang Yukui
A polyethyleneimine (PEI)-modified attapulgite was employed as a new adsorbent for solid-phase extraction (SPE) of chlorophenols (CPs) from environmental water samples. Key factors pivotal to extraction efficiency, such as organic additive, pH, salt, sample loading volume, elution volume, and sample loading flow rate, were investigated. The maximum adsorption capacity of CPs reached 38 mg/g, and the adsorption behavior could be described with the Langmuir isotherm model. The developed SPE procedure was then tested on river water samples. Of this cartridge, 0.4 g could be used to treat up to 100 mL of the water sample, with high recoveries achieved. The limit of detection ( S / N = 3) and the limit of quantification ( S / N = 10) were in range of 0.08–0.56 and 0.27–1.88 ng/mL, respectively. The mean recoveries of CPs spiked in river water samples ranged from 84.4 to 96.8% with relative standard deviations for the intra-day and inter-day less than 6.30%. The developed SPE method exhibited high sensitivity, high selectivity, excellent accuracy, and good repeatability to the analysis of trace CPs in complicated aqueous matrices.
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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
PubMed
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 27
·3402-3407
·
IF 2.073
Mengyu Qi,Chunyan Tu,Yuanyuan Dai,Weiping Wang,Aijun Wang,Jianrong Chen
In this work, an aptamer-based colorimetric method for the detection of tetracycline (TC) was established by employing gold nanoparticles (AuNPs) as the colorimetric probe. In the absence of TC, the aptamers are readily adsorbed on the surface of AuNPs, which prevents aggregation of AuNPs and stabilizes the red colloidal solution against high concentrations of NaCl. In the presence of TC, the aptamers are subsequently released from the surface of the AuNPs due to binding with TC molecules. A gradual color change from red to blue was observed due to the salt-induced aggregation of AuNPs. Furthermore, a linear relationship between the absorbance intensity and the concentration of TC was observed in the range of 0.10 to 5.00 μM. The limit of detection was 0.071 μM. The developed assay was employed for the determination of TC in environmental water samples. The recoveries ranged from 106.7% to 115.6% with relative standard deviations being less than 3.0%. The results demonstrate that the method serves as a promising tool for the rapid, simple and cost-effective detection of TC.
研究领域:
分析化学
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环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Peng’an Zhu,Jiangle Zhang,Jingjing Jin,Xing Huang,Xinfeng Zhang
Ferrous ion (Fe 2+ ) can indicate the redox situation of water and also plays an important role in maintaining the ecological balance of water bodies. However, due to the redox-active property of Fe 2+ , it is still a huge challenge to sensitively and accurately determine Fe 2+ especially in interstitial water. Herein, we prepared a ferrozine gel rod for valence fixation during sampling and subsequent smartphone-based detection of Fe 2+ . The electrode potential of the redox pair can be varied through the formation of Fe 2+ -ligand complexes, and when E complex was higher than E O 2 / OH − , the oxidation of Fe 2+ by O 2 was hindered, thus achieving the valence fixation of Fe 2+ . Six ligands were screened, and it was found that ferrozine could effectively increase the redox potential after complexing with Fe 2+ , and also exhibits an obvious color change while fixing the valence of Fe 2+ . To facilitate Fe 2+ detection, a cross-linked porous polymer gel rod prepared by acrylamide and sodium alginate was used to encapsulate the ferrozine molecules. The ferrozine gel rod enabled fixation the valence of Fe 2+ longer than 30 days, and the resulted purple-red color was pictured and analyzed by a smartphone. Ultimately, the developed ferrozine gel rod sensing system was able to achieve sensitive and linear detection of Fe 2+ in the range of 1–200 μM with the limit of detection as low as 0.33 μM, and it also exhibited excellent selectivity and anti-interference ability. The accuracy and reliability of the method was verified by the determination of Fe 2+ in spiked water samples and certified standard reference water samples. Finally, the ferrozine gel rod sensing system was successfully applied to in-situ detection of Fe 2+ in interstitial water, overlying water and upper water of lake and river. This facile system that enabled valence fixation and fast detection is promising for detection of Fe 2+ in environmental waters.
研究领域:
分析化学
·
环境科学
✓ 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）