Hunan Province Environmental Monitoring Center

Changsha, China

Hunan Province Environmental Monitoring Center

Changsha, China
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Huang Z.,Hunan Province Environmental Monitoring Center | Huang Z.,State Environmental Protection Key Laboratory of Monitoring for Heavy Metal Pollutants | Zhu S.,Shanghai University of Electric Power | Zhou Z.,Shanghai University of Electric Power | Peng R.,Changsha Environmental Monitoring Station
Chinese Journal of Environmental Engineering | Year: 2017

The transformation of dissolved organic matter (DOM) in the wastewater treatment plant of a papermaking industrial park was investigated by conventional chemical analysis, UV-vis spectroscopy, gel chromatography, and three-dimensional fluorescence. The results indicated that the wastewater treatment plant effectively removed organic pollutants from the integrated industrial park wastewater. The UV-vis spectroscopy and gel chromatography analyses showed that hydrolysis acidification degraded macromolecular substances into small molecules and decreased the humification degree, and the proportion of small molecules increased after advanced oxidation treatment. DOM from the integrated industrial park wastewater decomposed into five fluorescent components: tryptophan-like proteins, aromatic proteins, humic-like substances, fulvic-like substances, and tyrosine-like proteins. The hydrolysis acidification process increased the amount of aromatic proteins and humic- and fulvic-like substances in the DOM, whereas advanced oxidation effectively degraded the proteins- and humic-like fluorescent substances. © 2017, Science Press. All right reserved.


Zhu R.,Beijing Normal University | Zhu R.,Hunan Province Environmental Monitoring Center | Zhou G.,Hunan Province Environmental Monitoring Center | Zhou G.,Hunan University | And 4 more authors.
International Journal of Analytical Chemistry | Year: 2017

Based on the strong interaction between histidine and copper ions and the signal enhancement effect of gold-labeling carbon nanotubes, an electrochemical sensor is established and used to measure copper ions in river water. In this study the results show that the concentrations of copper ion have well linear relationship with the peak current in the range of 10-11-10-7mol/L, and the limit of detection is 10-12mol/L. When using this method to detect copper ions in the Xiangjiang River, the test results are consistent with the atomic absorption method. This study shows that the sensor is convenient to be used in daily monitoring of copper ions in river water. © 2017 Rilong Zhu et al.


Zhang L.,CAS Yantai Institute of Coastal Zone Research | Zhang L.,University of Chinese Academy of Sciences | Lu W.,CAS Yantai Institute of Coastal Zone Research | Lu W.,University of Chinese Academy of Sciences | And 2 more authors.
International Journal of Electrochemical Science | Year: 2011

The applicability of gold microelectrode of 25 μm diameter for electrochemical determination of trace copper ions (Cu2+) in water samples by anodic stripping voltammetry (ASV) has been demonstrated. The analysis of Cu2+ at gold microelectrode includes two steps. Cu2+ ions are firstly reduced and accumulated on the microelectrode surface during an accumulation step, then oxidized during the positive potential sweep. Due to the rapid mass transporting and low background current of gold microelectrode, low detection limit (0.3 nM) and wide linear range (1.0-90 nM) can be obtained. The practical application of gold microelectrode was verified by determination of trace level of Cu2+ in tap water, lake water and commercial drinking water samples. © 2011 by ESG.


Liu L.,Hunan Province Environmental Monitoring Center | Luo Y.,Hunan Province Environmental Monitoring Center | Bi J.,Hunan Province Environmental Monitoring Center | Li H.,Tsinghua University | Lin J.-M.,Tsinghua University
Science China Chemistry | Year: 2015

An analytical method was developed to quantitatively determine selected monohydroxy metabolites of polycyclic aromatic hydrocarbons (PAHs) in human urine. The procedure included enzymatic hydrolysis to cleave the conjugated metabolites, solid-phase microextraction enrichment, and gas chromatography-mass spectrometry analysis. The method proved to be sensitive enough to detect the selected PAH metabolites in human urine. © 2015 Science China Press and Springer-Verlag Berlin Heidelberg.


Liu L.,Hunan Province Environmental Monitoring Center | Luo Y.,Hunan Province Environmental Monitoring Center | Bi J.,Hunan Province Environmental Monitoring Center | Li H.,Beijing Key Laboratory of Microanalytical Methods and Instrumentation | Lin J.-M.,Beijing Key Laboratory of Microanalytical Methods and Instrumentation
Science China Chemistry | Year: 2015

An analytical method was developed to quantitatively determine selected monohydroxy metabolites of polycyclic aromatic hydrocarbons (PAHs) in human urine. The procedure included enzymatic hydrolysis to cleave the conjugated metabolites, solid-phase microextraction enrichment, and gas chromatography-mass spectrometry analysis. The method proved to be sensitive enough to detect the selected PAH metabolites in human urine. © 2015 Science China Press and Springer-Verlag Berlin Heidelberg


Lin H.-L.,Hunan University | Lin H.-L.,Hunan Province Environmental Monitoring Center | Li Z.-H.,GRG Metrology and Test Hunan CO. | Liu P.,Hunan Province Environmental Monitoring Center | And 3 more authors.
Analytical Methods | Year: 2016

A wireless magnetoelastic-sensing device for the selective detection of benzo[a]pyrene (BaP) is reported using aminocalix[4]arene (AC4) monolayers as the sensor sensing elements and AC4-modified Au nanoparticles (AC4-Au NPs) as signal-amplifying tags. A sandwich-type detection strategy involves the AC4 self-assembled on the Au-protected sensor surface and AC4-Au NPs, both of which flank the BaP target in sequence. As the AC4-Au NPs combined BaP absorbs on the sensor's surface, there is an increase in the mass load on the sensor, and consequently a decrease in resonance frequency. Under optimal conditions, the sensor shows a linear response to the concentration of BaP in the range of 1.04 × 10-7 M to 1.04 × 10-11 M, with a detection limit of 5.0 × 10-11 M. Other polycyclic aromatic hydrocarbons (PAHs) and environmental pollutants show no interference on the detection. © The Royal Society of Chemistry 2016.


Pan D.,CAS Yantai Institute of Coastal Zone Research | Zhang L.,CAS Yantai Institute of Coastal Zone Research | Zhang L.,University of Chinese Academy of Sciences | Zhuang J.,Shandong Normal University | And 4 more authors.
Materials Letters | Year: 2012

Electrochemical properties of commercial tin-bismuth alloy were investigated and the tin-bismuth alloy based electrode was used for stripping voltammetric determination of cadmium (Cd 2 +) for the first time. Electrodeposition and electrochemical stripping of Cd 2 + on tin-bismuth alloy electrode (SnBiE) were implemented and the results with an excellent linear dynamic range of 5-500 nM, a correlation coefficient of 0.999 and a detection limit of 1.1 nM were obtained under the optimal experimental conditions. It revealed that not only does this environment friendly alloy electrode material have a high hydrogen overvoltage and relatively wide potential window, but also has excellent repeatability and reproducibility. The practical application was carried out for the determination of Cd 2 + in food samples and the results were consistent well with those by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). © 2011 Elsevier B.V. All rights reserved.


Liao Y.,Nanjing Agricultural University | Liao Y.,Hunan Province Environmental Monitoring Center | Liang J.,Nanjing Agricultural University | Zhou L.,Nanjing Agricultural University
Chemosphere | Year: 2011

This study investigates synthesis of biogenic schwertmannite by Acidithiobacillus ferrooxidans and its role and mechanism in adsorption of As(III) from water. Results indicate that schwertmannite particles formed through oxidation of ferrous sulfate by A. ferrooxidans cells for different times vary greatly in size and in morphology. The hedge-hog like schwertmannite formed after reaction for 72h are aggregative spheroid particles with a diameter of approximately 2.5μm and its chemical formula can be expressed as Fe8O8(OH)4.42(SO4)1.79. Batche studies show that both Freundlich and Langmuir model are suitable for describing the adsorption behavior of As(III) on schwertmannite at pH 7.5 and As(III) in simulated groundwater can be effectively removed by biogenic schwertmannite with a maximum adsorption capacity of 113.9mg As(III) g-1 and the optimal pH is in the range of 7-10. The arsenic removal is hardly affected by the competing anions often observed in groundwater unless the mole concentration of PO43- and SO42- in groundwater are 75 or 750 times higher than As(III), respectively. The mechanism of As(III) adsorption on biogenic schwertmannite involves ligand exchanges between arsenic species and surface hydroxyl group and sulfate. In addition, experiments show that As(III)-sorbed biogenic schwertmannite aged in deionized water at 25°C exhibits no mineralogy phase changes even after ageing at pH 6.0 and 8.5 for 90d. © 2011 Elsevier Ltd.


Guo X.,Hunan University | Liu P.,Hunan Province Environmental Monitoring Center | Yang X.,Hunan University | Wang K.,Hunan University | And 6 more authors.
Analyst | Year: 2015

A multiple amplification strategy has been developed for nucleic acid detection based on host-guest interaction between the β-cyclodextrin polymer (β-CDP) and pyrene. Briefly, the detection system consists of three parts: the polymerase and nicking enzyme-assisted isothermal strand displacement amplification (SDA) activated by a target DNA or microRNA; the exonuclease III-aided cyclic enzymatic amplification (CEA); and the fluorescence enhancement effect based on host-guest interaction between β-CDP and pyrene. This strategy showed a good positive linear correlation with target DNA concentrations in the range from 75 fM to 1 pM with a detection limit of 41 fM. Significantly, our amplification platform was further validated and evaluated successfully by assaying miRNA-21 in human serum. The proposed assay has great potential as a nucleic acid quantification method for use in biomedical research, clinical analysis and disease diagnostics. This journal is © The Royal Society of Chemistry 2015.


Zhang Q.,Shandong University | Zhu R.,Hunan Province Environmental Monitoring Center | Kang Q.,Shandong University | Lu W.,CAS Yantai Institute of Coastal Zone Research | And 2 more authors.
International Journal of Electrochemical Science | Year: 2012

Cobalt hexacyanoferrate particles were ground with water-miscible room-temperature ionic liquid, 1-methylimidazolium trifluoroacetic acidic salts (HMImTfa), and resulted in HMImTfa-CoHCF gel. The electrochemical properties of HMImTfa-CoHCF gel were investigated in detail. The impedance data show that HMImTfa-CoHCF gel is mixed ionic-electronic and has 2.5 times the improvement of the conductivity than that of pure HMImTfa. HMImTfa-CoHCF gel can be used in chemically modified electrode for the electrocatalytic oxidation of NADH. The corresponding results have important implications for the design of nano-structured and nano-composite materials based on water-miscible room-temperature ionic liquids, which could be used widely in chemo/biosensing and catalysis. © 2012 by ESG.

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