A model for predicting dissolved organic carbon distribution in a reservoir water using fluorescence spectroscopy

Goslan, Emma H.; Voros, Nikolaos S.; Banks, Jenny; Wilson, Derek; Hillis, Peter; Campbell, Andrew T.; Parsons, Simon A.

doi:10.1016/j.watres.2003.10.027

Cited by 20 publications

(14 citation statements)

References 23 publications

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“…In the study reservoirs, DOC concentrations were similar to those reported in other Mediterranean reservoirs (Marcé et al, 2008), higher than in Asian temperate reservoirs (Kim et al, 2000;Wei et al, 2008) and lower than in European temperate reservoirs (Goslan et al, 2004;Pierson-Wickmann et al, 2010). Among the study reservoirs, the DOC concentration in Cubillas was always higher than in Béznar and Quéntar likely due to its highest catchment area and the ratio of catchment to reservoir area (Table 1).…”

Section: Direct Effects Of Wsoc Deposition On the Reservoir Doc And Cdomsupporting

confidence: 79%

Contribution of dust inputs to dissolved organic carbon and water transparency in Mediterranean reservoirs

et al. 2012

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Abstract. The Mediterranean reservoirs receive frequent atmospheric Saharan dust inputs with soil-derived organic components mostly during the stratification periods, when run-off inputs are particularly limited. Here, we quantified and optically characterized the water-soluble organic carbon (WSOC) of the (dry and wet) atmospheric deposition in collectors placed near three reservoirs from the western Mediterranean Basin. In addition, we determined the WSOC contribution to the pool of dissolved organic carbon (DOC) in the reservoirs and the influence of dust-derived chromophoric organic components on the water transparency during their stratification periods.We found synchronous dynamics in the WSOC atmospheric inputs among the three collectors and in the DOC concentrations among the three reservoirs. The DOC concentrations and the WSOC atmospheric inputs were positive and significantly correlated in the most oligotrophic reservoir (Quéntar) and in the reservoir with the highest ratio of surface area to mixing water depth (Cubillas). Despite these correlations, WSOC atmospheric inputs represented less than 10% of the total DOC pool, suggesting that indirect effects of dust inputs on reservoir DOC may also promote these synchronous patterns observed in the reservoirs. Chromophoric components from dust inputs can significantly reduce the water transparency to the ultraviolet radiation (UVR). The depths where UVR at λ = 320 nm was reduced to ten percent of surface intensity (Z 10 % ) decreased 27 cm in Béznar, 49 cm in Cubillas, and 69 cm in Quéntar due to the dust inputs. Therefore, the increasing dust export to the atmosphere may have consequences for the water transparency of aquatic ecosystems located under the influence of the global dust belt.

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Section: Direct Effects Of Wsoc Deposition On the Reservoir Doc And Cdomsupporting

confidence: 79%

Contribution of dust inputs to dissolved organic carbon and water transparency in Mediterranean reservoirs

et al. 2012

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“…More recently, TLS has been applied successfully to the study of fluorescent compounds occurring both in dissolved and in stabilized organic matter from various sources and origins [22][23][24][25][26]. Contour maps of HAs isolated for both series at the different stage of composting are shown in Fig.…”

Section: Fluorescence Spectramentioning

confidence: 99%

Elemental and spectroscopic characterization of humic-acid-like compounds during composting of olive mill by-products

Droussi¹,

D’Orazio²,

Hafidi

et al. 2009

Journal of Hazardous Materials

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“…TL spectroscopy Recently, TL spectroscopy has been applied successfully to the study of fluorescent compounds occurring both in dissolved and in stabilized OM (Mobed et al 1996;Chen et al 2002Chen et al , 2003Alberts and Takacs 2004;Goslan et al 2004;Corvasce et al 2006). In particular, TL spectra are the result of merging a series of emission scans from excitations over a range of wavelengths, and allow more detailed information to be obtained, including the number and type of fluorophores present as well as their abundance.…”

Section: Fluorescence Spectroscopymentioning

confidence: 99%

Chemical and spectroscopic investigation of porewater and aqueous extracts of corresponding peat samples throughout a bog core (Jura Mountains, Switzerland)

et al. 2009

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Background, aim, and scope Fluorescence and UV-visible spectroscopies are simple but useful methods to characterize organic matter in the aqueous phase according to its aromatic nature and humification degree. Although there are several studies about porewater and water-extractable organic matter (WEOM) from peat, at present, no comparative investigations are available in the literature. Thus, the aim of the present study was to identify and compare chemical and spectroscopic features of porewaters and corresponding WEOM samples along a 105-cm undisturbed peat profile. Material and methods The peat core was collected in June 2005 from a Swiss ombrotrophic bog and divided into slices of 1±0.15-cm thickness. Porewater samples (n=91) were extracted and analyzed for pH; from these, 30 samples were filtered (0.45 μm), analyzed for dissolved organic carbon (DOC) concentration, and characterized by means of UV-vis (E 4 /E 6 ratio) and fluorescence spectroscopies. The same analyses were also carried out on the WEOM of the corresponding peat samples. Results and conclusionsThe results show several differences between porewaters and WEOM throughout the bog profile. In particular, and with the exception of the first ca. 20 cm depth, spectroscopic data clearly underline a more "humic-like" character of DOC of WEOM compared to porewater samples. Furthermore, the trends in E 4 /E 6 ratios of both porewaters and WEOM samples indicate that the organic matter is characterized by decreasing aromaticity, molecular weights, and degree of polycondensation throughout the profile. The high correlation among the bulk density of the peat and the DOC concentrations in both porewaters and WEOM samples demonstrates a clear stratification of the organic matter which suggests that the vertical migration of DOC is rather limited. The first ca. 20 cm of the profile shows also opposite physicochemical and spectroscopic features compared to the deeper horizons probably because this is the predominantly oxic zone with far greater physiological activity of plants and microorganisms. Recommendations and perspectives Assessing porewater and WEOM features throughout peat, soil, and sediment profiles is important to better understand water-sediment interface dynamics and translocation processes of organic and inorganic pollutants, especially considering that ombrotrophic bogs are often used as archives of atmospheric depositions.

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A model for predicting dissolved organic carbon distribution in a reservoir water using fluorescence spectroscopy

Cited by 20 publications

References 23 publications

Contribution of dust inputs to dissolved organic carbon and water transparency in Mediterranean reservoirs

Contribution of dust inputs to dissolved organic carbon and water transparency in Mediterranean reservoirs

Elemental and spectroscopic characterization of humic-acid-like compounds during composting of olive mill by-products

Chemical and spectroscopic investigation of porewater and aqueous extracts of corresponding peat samples throughout a bog core (Jura Mountains, Switzerland)

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