The use of surfactant-based separation techniques for monitoring of orthophosphate in natural waters and wastewater
Φόρτωση...
Ημερομηνία
Συγγραφείς
Katsaounos, C. Z.
Giokas, D. L.
Vlessidis, A. G.
Paleologos, E. K.
Karayannis, M. I.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Elsevier
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Science of the Total Environment
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
In an effort to monitor orthophosphate in natural waters and wastewater in the Ipirous region (Greece), an analytical methodology was established owing to the need for interference-free determination at the low mg/l levels. The method applied for the determination of orthophosphate is based on its reaction with molybdate towards a yellow heteropoly acid complex, Which is electrically balanced with a cationic surfactant (cetylatrimethylammonium bromide) towards a complex non-polar derivative. This derivative is conveniently solubilized in the micelles of a non-ionic surfactant, under mild conditions and measured spectrophotometrically at 370 nm after its uptake with a sulfuric acid-methanol solution. By simply preconcentrating 10 ml of sample volume a detection limit of 2.6 muM was obtained. Due to the required dilution step and signal enhancement caused by the presence of surfactant, interference from the presence of anionic species (mostly silicate and arsenate) was minor and could be conveniently alleviated by the use of tartaric acid and Na2SO3, respectively. The method was successfully applied to real samples obtained for the natural sites subject., to the monitoring survey ranging in their matrix complexity from clean river water to wastewater. (C) 2002 Elsevier Science B.V. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
cloud point extraction, natural waters, orthophosphate, wastewater, atomic-absorption spectrometry, flow-injection analysis, spectrophotometric determination, phosphate, phosphorus, fractionation, extraction, blue
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000182535700013
http://ac.els-cdn.com/S0048969702004989/1-s2.0-S0048969702004989-main.pdf?_tid=a5c795be-356a-11e3-9586-00000aacb35d&acdnat=1381821971_b3e25e82b3563cf02c7a46cf772806e5
http://ac.els-cdn.com/S0048969702004989/1-s2.0-S0048969702004989-main.pdf?_tid=a5c795be-356a-11e3-9586-00000aacb35d&acdnat=1381821971_b3e25e82b3563cf02c7a46cf772806e5
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας