Study on the spectral and Cu (II) binding characteristics of DOM leached from soils and lake sediments in the Hetao region

Guo, Xujing; Jiang, Jinyuan; Xi, Beidou; He, Xiao-Song; Zhang, Hui; Deng, Yu

doi:10.1007/s11356-011-0704-0

Cited by 30 publications

(10 citation statements)

References 33 publications

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“…Our previous research has shown that the fulvic-like substances in soil DOM and protein-like material in sediment DOM were quenched by increasing Cu II and Hg II concentrations in Lake Wuliangsuhai. [7,23] A large logarithmic stability constant showed that DOM has a high Cu binding affinity in soils. [23] Because of agricultural drainage, a large number of nonpoint-source pollutants have entered the lake and resulted in changes in the structure of the DOM in the lake sediments.…”

Section: Introductionmentioning

confidence: 99%

Using fluorescence quenching combined with two-dimensional correlation fluorescence spectroscopy to characterise the binding-site heterogeneity of dissolved organic matter with copper and mercury in lake sediments

Guo

Li²,

Feng

et al. 2017

Environ. Chem.

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Environmental contextDissolved organic matter (DOM) plays an important role in influencing the migration and ultimate fate of metals. Different sources of pollution resulted in changes in the structure of sediment DOM in Lake Wuliangsuhai. We investigate the binding properties of DOM with CuII and HgII using fluorescence quenching combined with two-dimensional correlation spectroscopy (2D-COS) in order to demonstrate the influence of different sources of DOM on metals. AbstractDissolved organic matter (DOM) was collected from three sampling sites (L1, L2 and L3) in Lake Wuliangsuhai. L1 received upstream industrial wastewater and domestic sewage. L2 had suffered from agricultural non-point source pollution. L3 was situated in the lake outlet area. The complexation of DOM with CuII and HgII was investigated based on fluorescence quenching of the synchronous fluorescence spectra on the addition of CuII and on two-dimensional correlation spectroscopy (2D-COS). The synchronous and asynchronous maps derived from 2D-COS provided a clear picture of the heterogeneous distribution of CuII and HgII binding sites, which was not readily detected using only the synchronous fluorescence spectra. CuII and HgII complexation was stronger at shorter wavelengths than at longer wavelengths. Moreover, fluorescence quenching also occurred intensely in the fulvic-like regions (363nm for DOM-Cu in L2 and 365nm for DOM-Hg in L1). The logarithms of the stability constants (log KM) ranged from 4.42 to 6.23, from 4.75 to 4.86, and from 4.80 to 5.73 for DOM-Cu in L1, L2 and L3, respectively, depending on the wavelength. DOM at the longer wavelengths exhibited a higher log KM than that at the shorter wavelengths, and the f values in the protein-like region were clearly high. These results suggest that the influence of the structural and chemical properties of DOM on CuII binding may differ for DOM from different sources. The combined approach of fluorescence quenching and 2D-COS could be applied as a tool for evaluating the metal binding site heterogeneity of DOM.

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Section: Introductionmentioning

confidence: 99%

Using fluorescence quenching combined with two-dimensional correlation fluorescence spectroscopy to characterise the binding-site heterogeneity of dissolved organic matter with copper and mercury in lake sediments

Guo

Li²,

Feng

et al. 2017

Environ. Chem.

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“…Todas as bandas selecionadas dos espectros obtidos neste estudo, são bandas comumente encontradas em ácidos húmicos extraídos de solos (STEVENSON, 1994;BENITES et al, 1999;GONZÁLEZ-PÉREZ et al, 2004;MARTINS, 2009;GUO et al, 2012). A banda que se encontra na região de 2.920 a 2.900 cm -1 é atribuída a deformação axial assimétrica de C-H em compostos alifáticos, como metil e metileno.…”

Section: Espectroscopia No Infravermelho Com Transformada De Fourierunclassified

“…A intensidade dessa banda também aumentou, com o aumento da profundidade. A região de 1.280 a 1.200 cm -1 é atribuída a estiramento de C=O de ácidos carboxílicos, segundo alguns autores, essas carbonilas são responsáveis pela complexação de metais presentes no ambiente (PICCOLO; STEVENSON, 1982;HERNÁNDEZ et al, 2006;GUO et al, 2012;. Avaliando a intensidade dessa banda para a área degradada (A4), verificou-se que a intensidade se mantém em todas as profundidades, já para a mata nativa (A5), as intensidades da banda aumentam, conforme aumenta a profundidade.…”

Section: Espectroscopia No Infravermelho Com Transformada De Fourierunclassified

“…A1 -intensiva irrigada e alta lotação animal; A2 -intensiva sequeiro e alta lotação animal; A3 -em recuperação e média lotação animal; A4 -degradada e média lotação animal e A5 -mata nativa sendo a área de referência. STEVENSON, 1982;LU;ALLEN, 2002;HERNÁNDEZ et al, 2006;GUO et al, 2012;GUO et al, 2015). Os resultados obtidos pelo FTIR, mostraram a forte presença dessas bandas, nos AH das áreas avaliadas, responsáveis por essas duas ligações.…”

Section: Fluorescência Matriz Excitação Emissãounclassified

“…Esses valores menores podem ser justificados pelo fato que a irrigação, erosão e o desmatamento do solo causam perdas da MOS , GUO et al, 2012e GUO et al, 2015. Observou-se que na área A4 a banda do FTIR, responsável pela ligação de C=O, se manteve constante em todas as camadas do solo, enquanto que em outras áreas houve um aumento dessa banda.…”

Section: Fluorescência Matriz Excitação Emissãounclassified

See 2 more Smart Citations

Utilização de métodos espectroscópicos para avaliação de ácidos húmicos extraídos de solos de diferentes sistemas produtivos de pastagens

Thiago¹

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Investigating Spectral Characteristics and Spatial Variability of Dissolved Organic Matter Leached from Wetland in Semi‐Arid Region to Differentiate Its Sources and Fate

Guo

Jiang

et al. 2013

CLEAN Soil Air Water

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Dissolved organic matter (DOM) collected from different sampling sites in Lake Wuliangsuhai (Inner Mongolia Autonomous Region of China) was investigated using UV–Vis absorption and fluorescence spectroscopy. The three indices, SUVA280 and two spectral slopes (S275–295 and S350–400), were used to detect the change in the aromatic structure of DOM. DOM aromaticity was lower at sites W1 and W3, where industrial wastewater and domestic sewage, and agricultural drainage, contributed respectively. The humification index also indicated a low humification degree at sites W1 and W3, and high humification degree in other sites with relatively better water quality. Fluorescence regional integration (FRI) analysis has been used to quantitatively analyse fluorescence excitation–emission matrix spectra. The results showed that external contaminants can influence the distribution of Pi,n values from the FRI analysis. Serious pollution area obtained a relatively high Pp value. A significant negative correlation between Ph/Pp and f450/500 indicated the terrestrial or autochthonous sources of DOM. Therefore, the spectroscopic techniques combined with regional integration analysis can be used as a useful tool for investigating and assessing the lake ecological environment.

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Study on the spectral and Cu (II) binding characteristics of DOM leached from soils and lake sediments in the Hetao region

Cited by 30 publications

References 33 publications

Using fluorescence quenching combined with two-dimensional correlation fluorescence spectroscopy to characterise the binding-site heterogeneity of dissolved organic matter with copper and mercury in lake sediments

Using fluorescence quenching combined with two-dimensional correlation fluorescence spectroscopy to characterise the binding-site heterogeneity of dissolved organic matter with copper and mercury in lake sediments

Utilização de métodos espectroscópicos para avaliação de ácidos húmicos extraídos de solos de diferentes sistemas produtivos de pastagens

Investigating Spectral Characteristics and Spatial Variability of Dissolved Organic Matter Leached from Wetland in Semi‐Arid Region to Differentiate Its Sources and Fate

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