Estimation of the environmental impact of the phosphogypsum stockpile in the Schistos waste site (Piraeus, Greece) using a combination of laboratory techniques and GIS

Postgraduate Thesis uoadl:1321047 550 Read counter

Unit:
ΠΜΣ με ειδίκευση στην Εφαρμοσμένη Περιβαλλοντική Γεωλογία
Library of the School of Science
Deposit date:
2014-07-04
Year:
2014
Author:
Παπαγεωργίου Φανή
Supervisors info:
Αθανάσιος Γκοντελίτσας Επικ. Καθηγητής (Επιβλέπων), Νικόλαος Βούλγαρης Αναπλ. Καθηγ., Θεόδωρος Μερτζιμέκης Επίκ. Καθηγητής
Original Title:
Estimation of the environmental impact of the phosphogypsum stockpile in the Schistos waste site (Piraeus, Greece) using a combination of laboratory techniques and GIS
Languages:
English
Translated title:
εκτίμηση περιβαλλοντικών επιπτώσεων της απόθεσης φωσφογύψου στον αποκατεστημένο ΧΑΔΑ σχιστού κάνοντας χρήση εργαστηριακών τεχνικών και ΓΣΠ
Summary:
The present study was conducted in collaboration with the Environmental
Association of Municipalities of Athens - Piraeus (EAMAP). The purpose of the
present study was the determination of the radionuclides concentrations of the
phosphogypsum deposited in the Schistos waste site (Piraeus, Greece), as well
as the study of potential radiation release to the surrounding environment.
Sampling was carried out in collaboration with EAMAP, using GPS, in order to
record the exact location of each sampling site. Afterwards, several laboratory
and analytical techniques were employed to characterize the phosphogypsum and
soil samples collected from the deposit and the surrounding environment. These
techniques included powder-XRD, XRF, SEM-EDS and γ-ray spectrometry using a
HPGe detector. In addition, laboratory experiments, such as TCLP procedure and
leaching experiments using rainwater from the Attica region, were conducted.
Finally, the experimental results obtained from the γ-ray spectrometry were
distributed in maps created using GIS (Geographic Information Systems). The
resulted maps showed the radionuclides distribution in our studied area and the
potential hazard. The distribution indicated the existence of an area, in which
the radionuclides, more specifically the most imporant 226Ra, show elevated
concentrations. This can be attributed to the fact that phosphogypsum is
exposed at the time in the studied area.
Keywords:
Phosphogypsum, 226Ra, Radioactivity distribution, GIS maps
Index:
Yes
Number of index pages:
3-4
Contains images:
Yes
Number of references:
92
Number of pages:
117
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