Μελέτη της κατανομής των βαρέων μετάλλων σε σχέση με τα ιζηματολογικά και υδροδυναμικά χαρακτηριστικά της βόρειας θαλάσσιας περιοχής του Νομού Ηρακλείου, Νήσου Κρήτης.

Postgraduate Thesis uoadl:1318658 495 Read counter

Unit:
Τομέας Ορυκτολογίας - Πετρολογίας
Library of the School of Science
Deposit date:
2012-12-05
Year:
2012
Author:
Κουκουνάρη Ιόλη-Νικολέττα
Supervisors info:
Σεραφείμ Πούλος Αναπλ. Καθηγητής Ε.Κ.Π.Α.(επιβλέπων), Δασενάκης Εμμανουήλ Καθηγητής Ε.Κ.Π.Α., Κώστας Ντούνας Ερευνητής Α’ ΕΛ.ΚΕ.Θ.Ε.
Original Title:
Μελέτη της κατανομής των βαρέων μετάλλων σε σχέση με τα ιζηματολογικά και υδροδυναμικά χαρακτηριστικά της βόρειας θαλάσσιας περιοχής του Νομού Ηρακλείου, Νήσου Κρήτης.
Languages:
Greek
Summary:
The present study investigates the sedimentological characteristics, the
wind-induced waves and the distribution of trace metals (Fe, Zn, Mn, Cu, Cr and
Pb), as indicators of pollution, in the surficial offshore shelf sediments
along the northern coast of Heraklion Prefecture Crete, Mediterranean Sea). The
concentrations and the spatial distribution of the different trace metals, in
relation to the sedimentological characteristics and the water circulation
pattern of the continental shelf, are associated with human inshore sources of
pollutants located along the coastline of the study area. Purpose of the study
is the comparison of the sedimentological results as well as the heavy metal
concentrations with the previous study by Poulos et al. (2009) where sampling
took place in September 1989.
Heavy metal concentrations measured are not considered to be dangerous to human
health, as they are lower than the standard values given by USEPA, 1992 (US
Environmental Protection Agency), with only a few localized exceptions
concerning Cr. Furthermore, in opposition with the past results the reduction
of Cu, Pb and Zn concentrations in surficial sediments is outstanding.
Sampling was carried out in June 2010 using the R/V Philia while the field
survey was carried out at 59 stations over 9 transects from 10 to 70 m depths
(and up to 200m to a selected transect) perpendicular to the coastline of
Heraklion Bay. At each station, a single undisturbed sediment sample was taken
using a Smith McIntyre grab (Smith and McIntyre 1954). The standard sieve
analysis technique (Folk 1980) was used to determine the sand and mud (silt and
clay) percentages, of each of the surficial sediment samples. The total organic
carbon in sediment samples was determined according to the standard technique
outlined by Walkey (1947) with the modifications described by Jackson (1958)
and Loring&Rantala (1992). The concentrations of heavy metals were determined
by means of Flame Atomic Absorption Spectrophotometry (FAAS) with background
correction after being processed by dense acids.
Keywords:
Heavy metals , Sediment , Cretan shelf , Pollution, Wind-induced waves
Index:
No
Number of index pages:
0
Contains images:
Yes
Number of references:
56
Number of pages:
119
File:
File access is restricted.

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