Προσδιορισμός συγκεντρώσεων αρσενικού σε υπόγεια ύδατα της ευρύτερης περιοχής Θεσσαλονίκης: ενδεχόμενες επιπτώσεις στη δημόσια υγεία
Creators: name: Δουλγέρης, Χρήστος Γ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Γεωτρήσεις
Τρίχες, μαθητές
Δημόσια υγεία
Drillings
Hairs, students
Public health

description: Μελετήθηκε η ύπαρξη του αρσενικού στο πόσιμο νερό 68 γεωτρήσεων από 7 δήμους της ευρύτερης περιοχής Θεσ/νικης. Το θεωρητικό μέρος περιέχει βιβλιογραφία με την ύπαρξη του αρσενικού στη φύση, τη τοξικότητά του, τους τρόπους πρόσληψής του, και τα προβλήματα που προκαλεί στην υγεία του ανθρώπου. Μετρήθηκαν οι συγκεντρώσεις αρσενικού, μαγγανίου και άλλων παραμέτρων στο πόσιμο νερό των γεωτρήσεων και των σχολείων. Επίσης μετρήθηκε το αρσενικό στις τρίχες μαθητών της Σίνδου, της Χαλάστρας και του Αγίου Αθανασίου. Χρησιμοποιήθηκε φασματοφωτόμετρο ατομικής απορρόφησης και συσκευή παραγωγής αρσίνης για τη μέτρηση του αρσενικού στο νερό και τις τρίχες. Τα αποτελέσματα παρουσιάζονται σε πίνακες και γραφικές παραστάσεις. Εγινε στατιστική επεξεργασία συσχέτισης των συγκεντρώσεων αρσενικού στις τρίχες των μαθητών με την ηλικία τους και τη συγκέντρωση αρσενικού στο πόσιμο νερό. Συμπεράσματα: η συγκέντρωση αρσενικού φαίνεται να επηρεάζεται από τις συνθήκες του δέλτα του Αξιού ποταμού, από τη συγκέντρωση μαγγανίου κια την εποχή δειγματοληψίας. Η συγκέντρωση αρσενικού στις τρίχες των μαθητών αυξάνεται με τη συγκέντρωση αρσενικού στο πόσιμο νερό των σχολείων, ενώ μειώνεται με την ηλικία των μαθητών
description: In the present work, it has been studied, the existence of arsenic in potable water coming from 68 drillings of 7 municipalities in the Thessaloniki county, considering, also, parameters like dissolved ingredients, geological characteristics, geographic place of municipalities and human activities. In addition to that, the deposition of Arsenic in hair of young students has been studied in relation to the arsenic existence in schools' potable water and the age of the students. The first part of the thesis (theoretical) contains a literature review on the existence of arsenic in nature, in human environment and in the underground bearing water. Past theoretical and experimental studies show the interaction between arsenic and other water substances, explaining, also, the reason of arsenic existence in potable water. Other recent studies analyse the toxicity of Arsenic and possible ways of entering the human body. As a result of that, the main problems caused by arsenic are analytically reported. The literature research concludes with past cases showing the deposition of arsenic on human or animal hair. The experimental part of the present thesis includes the development of a technique for measuring Arsenic and other substances in potable water and human hair. The third part presents the findings of the research, including the measurements per municipality and the features of each drilling. In detail, the measurements in potable water from schools of 7 municipalities and the concentrations of Arsenic in students' hair coming from three apartments of three of the municipalities are presented. Graphic representation of the measurements makes apparent the wide differentiation between municipalities, drillings, or even seasonal times of taking the samples. Additionally, graphic representations show the arsenic concentration in potable water of schools, related to its concentration in students' hair. Statistical treatment of the results, showed the effect of water substances to the concentration of arsenic, in addition the relation between arsenic concentration in students hair, their age, and school water. The conclusions of the study are listed below: 1. The quality of potable water is influenced by the geographic place of municipalities in certain parameters, without being able to exclude with confidence the rest of the regions. Municipalities of Chalastra and Axios show high concentrations of arsenic, manganese and chloride ions, while they have low concentrations of nitric, calcium and magnesium ions. Municipalities of Ayios Athanasios, Lagadas and Thermaikos present problems in few drillings with high concentration of nitric ions and manganese. Municipality of Basilika does not present problem in any substance, while Echedoros municipality's few drillings show high concentration of manganese salts and chloride ions. 2. The concentration of arsenic appears to be influenced by manganese concentration, as referred, also, in other studies. In certain drillings the concentration of certain ions acts negatively to the concentration of arsenic. 3. The quality of potable water is influenced by the season of taking the sample. 4. Any civil activities do not appear to influence the quality of potable water, at least during the time period of taking the samplings in the particular drillings, whose depth is in excess of 150 meters. 5. The quality of potable water of school faucets is similar with the quality of drillings. 6. Arsenic appeared to be higher in concentration in students' hair, for students attending school with potable water richer in arsenic. The correlation of the two parameters has shown an appreciable proportion. 7. The cross-correlation of concentration of Arsenic in children' hair and their age, showed that the Arsenic concentration decreases with increasing age