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Identifier

000304770

Title

Ανάπτυξη μεθόδου υγρής χρωματογραφίας σε συνδυασμό με διαδοχική φασματομετρία μαζών για τον ποσοτικό προσδιορισμό των βιοκτόνων ουσιών τύπου βενζοθειαζολών σε αστικά λύματα κι εμπορικά προϊόντα / Μυλωνά Κυριακή.

Alternative Title

Development of a liquid chromatography-tandem mas spectrometry analytical method for the determination of benzothiazole type biocides in urban wastewater and commercial products

Author

Μυλωνά, Κυριακή Δημητρίου

Thesis advisor

Στεφάνου, Ευριπίδης

Abstract

The environmental concerns of water and soil quality have changed dramatically over the past few years. Besides the classic pollutants (e.g. PAHs, organochlorine pesticides, PCBs) a long list of potential contaminants emerged (ECs): endocrine disrupters, pharmaceuticals, biocides, gasoline additives, corrosion inhibitors, polyfluorinated surfactants and flame retardants. This study focuses on the determination of biocides such as benzothiazoles in wastewater treatment plants. Βenzothiazoles are a part of the molecular structure of a large number of natural products, biocides, drugs, food flavors, and industrial chemicals. They also appear in the environment mainly as a result of their production and use as rubber vulcanization accelerators. In order to investigate the environmental occurrence and behavior of these emerging contaminants during wastewater treatment sensitive analytical methods based on LC-MSn were developed for benzothiazoles. We detected these compounds in significant amounts, in both influents and effluents of the municipal wastewater treatment plant (WWTP) of Heraklion in both the dissolved and particulate phase. The mean total concentration of benzothiazoles ranged from 0,5-5,7 μg/L in the influent and effluent of the WWTP. OHBT was the most abundant compound. The removal of benzothiazoles is rather very low during biological treatment. Moreover, several urban runoff samples, car tires, antifreezing liquid, as well as dishwasher detergent (Calgonit) and water softener (Calgon) were analyzed for benzothiazoles in the present study. Total concentrations of benzothiazoles in urban runoff samples ranged from 0,03-4,28 μg/L, with 2-mercaptobenzothiazole (MBT) being most prominent (56%-68%), followed by benzothiazole (BT) and 2-aminobenzothiazole (ABT). The car tires contained 0,05-0,08 μg/g of ABT, 7,22-44,87 μg/g of BT, 0,24-0,67 μg/g of 2-methylthiobenzothiazole (MTBT), 27,68-40,74 μg/g of 2-hydroxybenzothiazole (OHBT) and 0,05-0,12 μg/g of MBT. Total concentrations of benzothiazoles in antifreezing liquid ranged from 2,95-157,97 μg/L, with 2-mercaptobenzothiazole (MBT) being most prominent (96%), followed by benzothiazole (BT) and 2-aminobenzothiazole (ABT). The dishwasher detergent contained 0,57 μg/g of MTBT followed by BT, ABT and OHBT and the water softener 1,18 μg/g of MBT and 0,03 μg/g of BT and OHBT.

Physical description

ii, 186 σ. : εικ. ; 30 εκ.

Language

Greek

Subject

Πανεπιστήμιο Κρήτης. Διατριβές.

Πανεπιστήμιο Κρήτης. Τμήμα Χημείας Μεταπτυχιακές εργασίες.

Issue date

2007-07-05

Collection

School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses

Type of Work--Post-graduate theses

Views

189

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