Chromophoric dissolved organic compounds in urban watershed and conventional water treatment process: evidence from fluorescence spectroscopy and PARAFAC

Sururi, Mohamad Rangga; Dirgawati, Mila; Notodarmojo, Suprihanto; Roosmini, Dwina; Putra, Prama Setia; Rahman, Adam Dzaky; Wiguna, Chairul Candra

doi:10.1007/s11356-022-24787-8

Cited by 1 publication

(2 citation statements)

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“…The BIX of inlet sites is approximately 0.8, which indicates an intermediate autochthonous component on DOM sources [8,29]. The BIX drastically changed from the inlet points (sites A to D, where it was practically constant as mentioned before) to the ones that suffered a chemical/biological process (treatment lines Po1/Po2 and Po3).…”

Section: Fluorescence Biological and Humification Indexesmentioning

confidence: 64%

“…Since typical fluorescence spectrometers could take between 10 and 40 min to acquire an EEM, the use of a single excitation wavelength is more practical for the real time monitoring. The most typical dimensionless values obtained from single emission spectra are the fluorescence index (FI), biological index (BIX), and humification index (HIX) [8][9][10]. Fortunately, due to the constant advancements in fluorescence spectrometers (as the replacement of the Xe lamp and monochromator for multiple single-wavelength LEDs as the excitation source [11]), the development of economic equipment for the instantaneous acquisition of EEMs is granted.…”

Section: Introductionmentioning

confidence: 99%

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Dissolved Organic Matter Behaviour by Conventional Treatments of a Drinking Water Plant: Controlling Its Changes with EEM-PARAFAC

Sciscenko,

Binetti,

Escudero-Oñate

et al. 2024

Applied Sciences

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In the last 20 years, several articles related to the use of fluorescence excitation–emission matrices—parallel factor analysis (EEM-PARAFAC) to monitor dissolved organic matter (DOM) in drinking- and wastewater treatment plants were published. Noteworthy, its use in respective quality control laboratories remains scarce. To extend its popularisation, in this work, EEM-PARAFAC was employed to analyse the DOM composition changes along the different stages of the drinking water treatment plant administrated by Società Metropolitana Acque Torino. The best PARAFAC model was the one of three components, indicating that the Po River is constituted, mainly, by humic acid-like (HA-L) and tryptophan-like (Try-L) substances, the tyrosine-like ones being negligible (Tyr-L). Results indicated that physical treatments (sedimentation) did not produce a reduction in the PARAFAC scores; however, a 50% decay in 254 nm absorbance was observed. Fluorescent DOM was only removed with chemical treatments, obtaining ca. 70% HA-L scores decay with ozonation and 40% with chlorination. Furthermore, although ozonation degraded HA-L substances, the Try-L scores increased by 25%, indicating the transformation of HA-L into smaller molecules. On the contrary, total organic carbon measurements only exhibited a significant change when comparing the treatment plant’s inlet and outlet (approximately a 45% decrease), but not within intermediate processes.

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Section: Fluorescence Biological and Humification Indexesmentioning

confidence: 64%