Fluorescence spectroscopic studies of natural organic matter fractions

Chen, Jie; LeBoeuf, Eugene J.; Dai, Sheng; Gu, Baohua

doi:10.1016/s0045-6535(02)00616-1

Cited by 388 publications

(176 citation statements)

References 30 publications

Supporting

Mentioning

146

Contrasting

Unclassified

Order By: Relevance

“…According to Smith and Kramer (1999), the components exhibiting peak III have polycyclic aromatic structures like flavone and coumarine (with ex/em of 400-420/460-480 nm). Peak IV is probably attributed to the polycyclic aromatic structures with more aromatic rings and a higher degree of conjugation (Chen et al, 2003). Therefore, the SF spectra reveal for all the original DOM fractions the existence of protein-like constituents and highly polycyclic aromatic materials, which are hard to be discerned from the EEM spectra.…”

Section: Structural Changes Examined By Synchronous Spectramentioning

confidence: 96%

“…Ozonation also shifts Type C fluorophores of HOA, HON, and HIA in excitation wavelength to longer wavelengths. The red-shift is ascribed to the increase of carbonyl, hydroxyl, alkoxyl, amino, and carboxyl groups in the structures of the fluorophores (Chen et al, 2003;Ś wietlik and Sikorska, 2004;Uyguner and Bekbolet, 2005). In comparison to ozonation, catalytic ozonation shifts further the peak maxima of some of the examined DOM fractions.…”

Section: Structural Changes Examined By Eemmentioning

confidence: 97%

“…However, it is quite difficult to clearly interpret the potential information contained in the EEM spectra (Cabaniss, 1992). SF spectra, therefore, were used to explore additional structure information with improved peak resolution for DOM (Cabaniss, 1992;Chen et al, 2003;Ś wietlik and Sikorska, 2004).…”

Section: Structural Changes Examined By Synchronous Spectramentioning

confidence: 99%

“…In recent years, fluorescence spectroscopy has been successively used as a simple and sensitive technique to obtain the structural information of aqueous DOM at relatively low concentrations (<20 mg l À1 TOC) (Mobed et al, 1996;Chen et al, 2003;Ś wietlik and Sikorska, 2004). It was found reliable in the study of multi-component humic solutes to discern not only DOM from various origins but also DOM subcomponents with varying compositions and functional properties (Coble, 1996;Mobed et al, 1996;McKnight et al, 2001;Baker, 2002;Chen et al, 2003;Liu et al, 2007). The position, shift, and intensity of fluorescence peaks can be correlated to structural information such as polycondensation, aromaticity, and the content of functional electron-donating/withdrawing groups (Chen et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…It was found reliable in the study of multi-component humic solutes to discern not only DOM from various origins but also DOM subcomponents with varying compositions and functional properties (Coble, 1996;Mobed et al, 1996;McKnight et al, 2001;Baker, 2002;Chen et al, 2003;Liu et al, 2007). The position, shift, and intensity of fluorescence peaks can be correlated to structural information such as polycondensation, aromaticity, and the content of functional electron-donating/withdrawing groups (Chen et al, 2003). With respect to investigating oxidation-induced structural changes of DOM, the fluorescence was used to examine the structural changes of DOM before and after chlorination, ozonation, ClO 2 oxidation, and photocatalytic oxidation (Korshin et al, 1999;Win et al, 2000;Ś wietlik and Sikorska, 2004;Uyguner and Bekbolet, 2005).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Fluorescence spectroscopic characterization of DOM fractions isolated from a filtered river water after ozonation and catalytic ozonation

et al. 2008

View full text Add to dashboard Cite

Fluorescence spectra were applied to investigate the structural changes of four dominant dissolved natural organic matter (DOM) fractions of a filtered river water before and after ozonation and catalytic ozonation. The ozonation and catalytic ozonation with synthetic goethite (FeOOH) and cerium dioxide (CeO 2 ) were carried out under normal conditions, i.e. pH 7, reaction time of 10 min, and ozone/DOC ratio of about 1. The fluorescence spectra were recorded at both excitation-emission matrix (EEM) and synchronous scanning modes. EEM results reveal that ozonation of these DOM fractions causes a significant decrease of the aromaticity of humic-like structures and an increase of electron withdrawing groups, e.g., carboxylic groups. The catalysts can further improve the destruction of the humic-like structures in catalytic ozonation. Synchronous spectra reveal that ozonation of hydrophobic acid and hydrophilic acid (HIA) yields a significant amount of by-products with low aromaticity and low molecular weight. Catalytic ozonation enhances substantially the formation of these by-products from HIA and improves the destruction of highly polycyclic aromatic structures for all examined DOM fractions.

show abstract

Section: Structural Changes Examined By Synchronous Spectramentioning

confidence: 96%

Section: Structural Changes Examined By Eemmentioning

confidence: 97%

Section: Structural Changes Examined By Synchronous Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fluorescence spectroscopic characterization of DOM fractions isolated from a filtered river water after ozonation and catalytic ozonation

et al. 2008

View full text Add to dashboard Cite

show abstract

Ground‐based measurement of fluorescent aerosol particles in Tokyo in the spring of 2013: Potential impacts of nonbiological materials on autofluorescence measurements of airborne particles

et al. 2015

View full text Add to dashboard Cite

We present results from the observation of fluorescent (FL) aerosols in Tokyo in the spring of 2013. Ambient aerosol particles were analyzed using a single‐particle laser‐induced fluorescence instrument. The fluorescent emission from a single particle excited by a pulsed UV laser (excitation wavelength of 263 nm) was detected by three photomultiplier tubes with band‐pass filters (fluorescence wavelength of 335–379, 420–500, and 500–600 nm). Fluorescence patterns from single particles were analyzed for investigating fluorophores and their sources using backward trajectory analysis, factor analysis, and a comparison with other tracer observations. The backward trajectory analysis suggested possible influences of long‐range transport from northern China in some cases. Observed supermicron FL aerosols were classified into two types: combustion‐ and dust‐type particles. The detection of combustion‐type FL aerosols, which showed temporal variations similar to nitrogen oxides and elemental carbon, implied the presence of polyaromatic hydrocarbons (PAHs) and their derivatives. Dust‐type FL aerosols, which were well correlated with the lidar‐derived dust‐aerosol optical depth near the surface (<1 km) and with mineral ions, were dominant in the supermicron size range. The number concentrations of coarse FL aerosols (≥2 µm), with which nonnegligible levels of fluorescence were recorded in all three channels, increased during Asian dust events (relative to a local dust event). It is suggested that PAHs and/or biological materials mixed with dust particles were transported from the North China Plain to the outflow region in East Asia during the observation period. Moreover, the autofluorescence measurement of airborne particles can be substantially affected by nonbiological materials in this region.

show abstract

Dissolved Organic Matter (DOM) in Natural Environments

Frimmel

Abbt‐Braun

2009

Biophysico‐Chemical Processes Involving Natural Nonliving Organic Matter in Environmental Systems

View full text Add to dashboard Cite

Fluorescence spectroscopic studies of natural organic matter fractions

Cited by 388 publications

References 30 publications

Fluorescence spectroscopic characterization of DOM fractions isolated from a filtered river water after ozonation and catalytic ozonation

Fluorescence spectroscopic characterization of DOM fractions isolated from a filtered river water after ozonation and catalytic ozonation

Ground‐based measurement of fluorescent aerosol particles in Tokyo in the spring of 2013: Potential impacts of nonbiological materials on autofluorescence measurements of airborne particles

Dissolved Organic Matter (DOM) in Natural Environments

Contact Info

Product

Resources

About