Comparison of river and canal water dissolved organic matter fluorescence within an urbanised catchment

Cârstea, Elfrida M.; Baker, Andy; Savastru, Roxana

doi:10.1111/wej.12062

Cited by 12 publications

(7 citation statements)

References 26 publications

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“…The four fluorescence components identified in the water samples are shown in Fig. ACCEPTED MANUSCRIPT (Kothawala et al, 2012), indicating the presence of anthropogenic-derived matter (Meng et al, 2013;Carstea et al, 2014). The distinction between urban and rural samples is better reflected by the C3/C1 ratio (Table 2): brook, lake and river samples with a rural character had the lowest values, pond sample had an intermediate urban and rural character due to the sampling location in an urban park, and canal and storm sewer with an urban impact showed the highest C3/C1 values.…”

Section: Fluorescence Properties Of Dommentioning

confidence: 99%

“…In recent years, fluorescence spectroscopy has been increasingly applied to the analysis of aqueous dissolved organic matter (DOM). The effectiveness of this technique in water quality analysis has been proven by studies on numerous types of water systems (Drozdowska, 2007;Kelton et al, 2007;Murphy et al, 2008;Ghervase et al, 2012;Kothawala et al, 2012;Carstea et al, 2014). Fluorescence has been correlated with standard parameters such as biological oxygen demand (Reynolds and Ahmad, 1997;Hudson et al, 2008;Hur and Kong, 2008), total organic carbon (Vodacek et al, 1995), nitrogen and chemical oxygen demand (Hur and Cho, 2012;Bridgeman et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Characterisation of dissolved organic matter fluorescence properties by PARAFAC analysis and thermal quenching

et al. 2014

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The fluorescence intensity of dissolved organic matter (DOM) in aqueous samples is known to be highly influenced by temperature. Although several studies have demonstrated the effect of thermal quenching on the fluorescence of DOM, no research has been undertaken to assess the effects of temperature by combining fluorescence excitation - emission matrices (EEM) and parallel factor analysis (PARAFAC) modelling. This study further extends previous research on thermal quenching by evaluating the impact of temperature on the fluorescence of DOM from a wide range of environmental samples, in the range 20 °C - 0 °C. Fluorescence intensity increased linearly with respect to temperature decrease at all temperatures down to 0 °C. Results showed that temperature affected the PARAFAC components associated with humic-like and tryptophan-like components of DOM differently, depending on the water type. The terrestrial humic-like components, C1 and C2 presented the highest thermal quenching in rural water samples and the lowest in urban water samples, while C3, the tryptophan-like component, and C4, a reprocessed humic-like component, showed opposite results. These results were attributed to the availability and abundance of the components or to the degree of exposure to the heat source. The variable thermal quenching of the humic-like components also indicated that although the PARAFAC model generated the same components across sites, the DOM composition of each component differed between them. This study has shown that thermal quenching can provide additional information on the characteristics and composition of DOM and highlighted the importance of correcting fluorescence data collected in situ.

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Section: Fluorescence Properties Of Dommentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterisation of dissolved organic matter fluorescence properties by PARAFAC analysis and thermal quenching

et al. 2014

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“…In all cases, the relationship between fluorescence intensity and residual DOC concentration in treated water was also investigated. Furthermore, recently, several studies have extensively investigated fluorescence fingerprints of OM obtained from EEMs data to locate fluorescence peaks and their intensities in raw and treated waters (Baker, 2005, Bieroza et al, 2009b, Zhu et al, 2014, Carstea et al, 2014.…”

Section: Characterisation Of Nom In Water Using Fluorescence-eemsmentioning

confidence: 99%

A fluorescence-based assessment of the fate of organic matter in water treated using crude/purified Hibiscus seeds as coagulant in drinking water treatment

Jones

Bridgeman

2019

Science of The Total Environment

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This study used fluorescence excitation-emission matrices (EEMs) analysis to investigate the characteristics of natural organic matter (NOM) in treated water using okra crude extract (OCE), sabdariffa crude extract (SCE) and kenaf crude extract (KCE) as coagulants. In addition, an assessment of the impact of purified okra protein (POP), purified sabdariffa protein (PSP) and purified kenaf protein (PKP) was undertaken. The performance evaluation of these coagulants in terms of increase or decrease in dissolved organic carbon (DOC) was compared with Peak T fluorescence intensity observed at excitation wavelength 220-230 nm, and emission wavelength 340-360 nm. Fluorescence analysis of water treated with the crude extracts identified the removal of DOC in peaks A and C region whereas the increase in DOC from the protein was predominantly found in peaks T and B region. Furthermore, it was observed that the purified proteins were noted to be capable of reducing the DOC concentration in raw water where all fluorophores were not detected. The application of OCE, SCE and KCE yielded an increase in DOC of 65, 61 and 55% respectively, corresponding to increases of 65, 29 and 54% in peak T fluorescence intensities, at 100 mg/l dose. Furthermore, DOC concentration was reduced by 25, 24 and 18% using POP, PSP and PKP respectively as coagulants with corresponding decreases in fluorescence intensity of 46%, 44 and 36% in POP, PSP and PKP, at a lower dose of 0.1 mg/l. Therefore, it is clear that Peak T fluorescence intensity could be used to characterise organic matter in treated water using natural extracts to assess final water quality.

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“…It can combine with metal ions to reduce its bioavailability and biotoxicity to aquatic systems [1,2] , meanwhile improving its solubility and ability of transference and translation by binding with organic or inorganic infectants [3] . Currently, dissolved organic matter (DOM) has attracted much attention in biogeochemical research fields due to its importance and the inherent complexity of its chemical composition, chemical structure and multiple sources [4,5,6] . The natural DOM includes a myriad of organic matters, such as humic substances and other biological compounds (e.g., carbohydrates, amino acids and fatty acids) [7,8] .…”

Section: Introductionmentioning

confidence: 99%

“…3 Currently, dissolved organic matter (DOM) has attracted much attention in biogeochemical research elds due to its importance and the inherent complexity of its chemical composition, chemical structure and multiple sources. [4][5][6] The natural DOM includes a myriad of organic matter, such as humic substances and other biological compounds (e.g., carbohydrates, amino acids and fatty acids). 7,8 The important components of DOM are humic substances including fulvic acid (FA) and humic acid (HA).…”

Section: Introductionmentioning

confidence: 99%

Investigating the composition of dissolved organic matter in natural water in rare earth mine using EEM-PARAFAC analysis

Yang

Jinxu

Liu

et al. 2014

Environ. Sci.: Processes Impacts

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In this study, we have characterized three fluorescent components of dissolved organic matter (DOM) in the surface and underground water of one rare earth element ore district by excitation-emission matrix (EEM) fluorescence spectroscopy coupled with parallel factor analysis (PARAFAC). Two protein-like components (C1, tyrosine and C2, tryptophan) and one humic-like component (C3) were identified by the DOM Fluor-PARAFAC model, with C3 constituting more than 95% of the total DOM, while C1 and C2 occupying a tiny fraction of DOM. The distribution of three PARAFAC-identified components was strongly influenced by the river direction, terrain and location of various water samples. The results suggested that DOM of samples collected from downstream or a central region had higher fluorescence intensity than those of upstream or surrounding the center. In addition, a negative linear correlation (R(2) = 0.8465) between pH (5.7-9.2) and fluorescence intensity of C3 was observed, indicating that the increase of pH might enhance the intensity of fluorescent humic-like substances. Although the fluorescence intensity of C1 and C2 was independent of pH changes, strong quenching effects of different heavy metals were presented for C1, and evident positive correlations between C2 and concentrations of rare earth metals (La, Ce, Tb, Dy, Tm, etc.) were observed, which showed that tyrosine-like (C1) and tryptophan-like (C2) substances were assumingly responsible for metal binding and adsorption in water, respectively. Based on EEM-PARAFAC modeling, all the fluorescence EEMs of samples could be decomposed into a three-component model, and their potential applications in water quality monitoring and metal-binding indicator were likely to be developed in the fluorescence analysis of natural water.

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Comparison of river and canal water dissolved organic matter fluorescence within an urbanised catchment

Cited by 12 publications

References 26 publications

Characterisation of dissolved organic matter fluorescence properties by PARAFAC analysis and thermal quenching

Characterisation of dissolved organic matter fluorescence properties by PARAFAC analysis and thermal quenching

A fluorescence-based assessment of the fate of organic matter in water treated using crude/purified Hibiscus seeds as coagulant in drinking water treatment

Investigating the composition of dissolved organic matter in natural water in rare earth mine using EEM-PARAFAC analysis

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