Bottom sediments in a polluted marine environment, upper Saronikos Gulf, Greece

Griggs, Gary B.; Grimanis, A.P.; Grimani, Maria Vassilaki

doi:10.1007/bf02380472

Cited by 21 publications

(13 citation statements)

References 9 publications

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“…Saronikos gulf falls within the typical oligotrophic marine system of the Eastern Mediterranean ecoregion. It is a semi-enclosed gulf, located in the central-western part of Aegean Sea, with an area of about 1117 Km 2 , and circa 450 m maximum depth (Griggs et al 1978, Krasakopoulou & Karageorgis 2005, Friligos 1982. Although there are no major riverine inputs, Saronikos waters are influenced by the Athens metropolitan area due to point discharges of sewage (Simboura & Zenetos 2005, Scoulos et al 2007.…”

Section: Study Sites and Sampling Designmentioning

confidence: 99%

Nitrogen as the main driver of benthic diatom composition and diversity in oligotrophic coastal systems

Kafouris

Smeti

Spatharis

et al. 2019

Science of The Total Environment

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Section: Study Sites and Sampling Designmentioning

confidence: 99%

Nitrogen as the main driver of benthic diatom composition and diversity in oligotrophic coastal systems

Kafouris

Smeti

Spatharis

et al. 2019

Science of The Total Environment

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“…Η παρούσα εργασία αποτελεί συνέχεια παλαιότερων γεωχημικών και ορυκτολογικών μελετών που πραγματοποιήθηκαν στα ιζήματα του Σαρωνικού κόλπου με έμφαση σε αυτά του κόλπου της Ελευσίνας (Grimanis et al, 1977, Griggs et al, 1978, MEDPOL/UNEP monitoring program 1983, Scoullos, 1986, Grimanis et al, 1987, Angelidis and Grimanis, 1987, Angelidis and Grimannis, 1989, Kalogeropoulos et al, 1993, Αναγνώστου κ.ά., 1993. Η συγκεκριμένη γεωχημική και ο ρυκτολογική μελέτη των ιζημάτων του κόλπου έγινε με στόχο την χωροχρονική αξιολόγηση του βαθμού επιβάρυνσης του από τις διακριτές πηγές ρύπανσης που προέρχονται από την ανθρωπο γενή δραστηριότητα.…”

Section: εισαγωγηunclassified

Geochemical and Mineralogical Analysis of Sediments From the Gulf of Elefsina -Study of the Anthropogenic Impact

2018

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Mineralogical and geochemical data on sediment of three sampling locations in the gulf of Elefsina, have been studied in order to access the impact of inorganic pollutants. The gulf is relatively shallow in depth and is connected to Saronicos bay with two shallow channels. This bottom physiography, worses the depositional environment since it receives pollutants of both the city and the industry without having wide towards the open sea. Grain size analysis of the surface sediments indicates that they are classified as sandy loam. However the main characteristic is the widespread appearance of a silty black layer, rich in organic matter. The thickness of the layer is 12 cm and is related to the oxic-anoxic conditions of the surface of the sediments. During the summer period the anoxic conditions promote an increase of the concentration of the organic matter in the bottom sediments which results in the widespread black coloring. The existence of a black layer in the first 10 to 12 cm of the cored sample is attributed to human activity. During the winter period, in which sampling took place, the increase in soluble O2 was responsible for the appearance of a thin brownish color top of the black layer. The thickness of this coloration is 0.5 mm. The pH of the sediments fluctuated between 7.4 and 8.5. The lower pH values are obtained in the top of the sediments while the higher ones in the bottom of the sediments. Data from the cation exchange capacity measurements have asserted the predominant of clays in the west side of the gulf. The distribution of total organic values yields higher values in the eastern side of the gulf (average value 4%) from the western side (average value 2.5%). Mineralogical composition of the sediments yielded the following minerals; quartz, calcite, dolomite, chlorite, illite, albite and alunite. A characteristic fluctuation of the soluble metals Pb, Ni, Zn, Cu, Μη, Cr, Hg and Cd, was observed, which characterize the environmental condition and pollution of the gulf of Elefsina

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“…These metals carried inroad runoff and percolate into the soils within the surrounding environment or may end up in various water sources (Duzgoren-Aydin et al, 2006;Florea, 2006). The continuous increase in heavy metal contamination of estuaries and coastal waters is a cause for concern as these metals have the ability to bio-accumulate in tissues of various biotas and may also affect the distribution and density of benthic organisms (Griggs et al, 1997) Environmental risk assessment is commonly done by comparing measured environmental concentrations with water quality criteria set to protect the aquatic life for a long period of time (European Commission 2003). However, these long-term criteria are not suitable to estimate the effects of the highly dynamic pollution resulting from wet-weather discharge.…”

Section: Introductionmentioning

confidence: 99%

Environmental Risk Assessment of Heavy Metals of Road Runoff in Ehimiri Housing Estate Umuahia, Abia State, Nigeria

2017

International Journal of Research in Agriculture and Forestry

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The study focused on the environmental risk evaluation of heavy metals in road runoff as non-point source in Ehimiri housing Estate Umuahia. Absorption Atomic Spectrophotometer was used for the analysis. The major streets selected include Sam Onyeozari street (ERSP1), Ukpai A.Ukpai street (ERSP2), Dick Uduma stree (ERSP3), Justice Atuma Street (ERSP4), Ibe Nwachukwu (ERSP5), Mazi Uwakaeme (ERSP6), and Nwogu street (ERSP7) respectively. A total of twenty one runoff samples, three each from the seven selected roads were collected across three months (May-August, 2014), and analyzed using standard methods. Results shown that heavy metal concentrations originating from the non-point source (NPS) in the selected routes were in the following ranges: Cd(0.01 -0.02 μg/l-1), Cu (10.00-45.00 μg/l-1), Cr(0.05-4.01 μg/l-1), Zn(5.00 -50.00 μg/l-1), and Pb(1.64 -29.01 μg/l-1), which further explained that concentrations were higher in the months of April and May in Aba road and reduced in other routes. An increased in heavy metals were observed during the month of July than the month of May. Statistically, mean variations were observed among heavy metals from road runoff that ranged between: Cd 0.07 μg/l-1, Cr 3.10 μg/l-1, Cu 22.70 μg/l-1, Pb 36.70 μg/l-1 and Zn 51. 40 μg/l1in order of Zn >Pb>Cu> Cr>Cd respectively. The results also indicated that Cd, Cu, Cr, Zn and Pb concentrations in road runoff sampled were above the NESREA and WHO standards for potable water during the month of April being first flush, May being the after first flush and July that proceeds August break that affects man and his environment.

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Bottom sediments in a polluted marine environment, upper Saronikos Gulf, Greece

Cited by 21 publications

References 9 publications

Nitrogen as the main driver of benthic diatom composition and diversity in oligotrophic coastal systems

Nitrogen as the main driver of benthic diatom composition and diversity in oligotrophic coastal systems

Geochemical and Mineralogical Analysis of Sediments From the Gulf of Elefsina -Study of the Anthropogenic Impact

Environmental Risk Assessment of Heavy Metals of Road Runoff in Ehimiri Housing Estate Umuahia, Abia State, Nigeria

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