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Dissolved organic matter in hand dug well water as groundwater quality indicator: assessment using laser induced fuorescence spectroscopy and multivariate statistical techniques

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dc.contributor.author Ntiri, B. Sefa
dc.contributor.author Awuah, B. Kwakye
dc.contributor.author Edziah, R.
dc.contributor.author Anderson, B.
dc.contributor.author Armah, F. A.
dc.contributor.author Amoah, P. Mensah
dc.contributor.author Sackey, S. S.
dc.contributor.author Sam, F.
dc.contributor.author Akyea, A. G.
dc.contributor.author Yunus, S.
dc.contributor.author Tatchie, E.
dc.contributor.author Nkansah, B. K.
dc.contributor.author Kumi, F.
dc.date.accessioned 2021-01-12T10:31:49Z
dc.date.available 2021-01-12T10:31:49Z
dc.date.issued 2020-03
dc.identifier.issn 23105496
dc.identifier.uri http://hdl.handle.net/123456789/4523
dc.description 16p:, ill. en_US
dc.description.abstract In groundwater, dissolved organic matter (DOM), a complex material, is a contaminant of concern owing to its ability to infuence water quality and stimulate microbial metabolism. Using a 445-nm diode laser-induced fuorescence (LIF) spectroscopy, DOM contamination levels have been investigated of well water samples fetched from ten privately owned hand-dug wells during dry and wet seasons of 2016, 2017 and 2018, in Ghana. The results showed spatio-temporal heterogeneities in the LIF spectra, and the fuorescence intensity peaks were generally higher and broader during the wet season than the dry season. In this study, DOM fuorescence spectra at an emission wavelength band of 460–650 nm showed two distinct broad peak shoulders within 480–500 nm and 550–570 nm, engulfng the water Raman peak at 527 ± 2 nm for all the water samples studied. Furthermore, principal component analysis and cluster analysis were used to diferentiate the 2016 water samples based on their DOM contamination levels. In each case, three groups or clusters were identifed based on their similarities and dissimilarities. The study revealed humic DOM substances as the most typical well water fuorophores. Applying the K-nearest neighbour algorithm as a classifer method for the classifcation of 30 water samples studied in 2016, 16.7% (5/30) were classifed as very good drinking water, 46.7% (14/30) as good, 26.7% (8/30) as fairly good, and 10% (3/30) as bad drinking water samples. In general, levels of dissolved organic matter contamination increased over the study period during the rainy seasons for wells situated in close proximity to septic tanks, refuse dumps, public toilets and in wetlands. Thus, in the study the fuorescence intensity depends on the sampling site and the season, and indicates the DOM contamination level en_US
dc.language.iso en en_US
dc.publisher University of Cape Coast en_US
dc.subject Dissolved organic matter en_US
dc.subject Hand-dug well water en_US
dc.subject Laser-induced fuorescence en_US
dc.subject Dry and wet seasons en_US
dc.subject Multivariate statistical techniques en_US
dc.subject Water quality monitoring and assessment en_US
dc.title Dissolved organic matter in hand dug well water as groundwater quality indicator: assessment using laser induced fuorescence spectroscopy and multivariate statistical techniques en_US
dc.type Article en_US


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