Advanced oxidation processes in flow analysis.

• Grant number: 13/22927-9
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: March 01, 2014
• End date: February 29, 2016
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Elias Ayres Guidetti Zagatto
• Grantee: Carla Cripa Crispino Kamogawa
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated research grant: 11/23498-9 - Advanced flow systems for technological, agronomical and environmental analysis, AP.TEM

Abstract

Analytical flow systems exploiting advanced oxidation processes (AOP) will be designed for in-line sample preparation. The in situ radical generation will be accomplished through the activation of classical oxidants (potassium peroxymonosulfate and potassium persulfate) with transition metals (Co, Ag and Mn). AOP's may or may not involve UV irradiation, depending on the performance evaluation, estimated in terms of the efficiency of organic matter decomposition. The feasibility of using materials with high oxidation potential such as electrolytically generated unstable ions will also be evaluated.As applications, analytical procedures for in-line sample preparation aiming at the spectrophotometric determinations of total phosphorus (as phosphate, phosphite and organic phosphorus) in foliar liquid fertilizers and in natural waters will be developed.The is multidisciplinary, as it includes relevant aspects from Analytical Chemistry, Environmental Chemistry, Instrumentation and Agronomy. It is innovative, as it deals with in-line sample preparation exploiting POA's in flow analysis and with the development of a novel methodology for the sequential determination of P-PO43- and P-PO33- in foliar fertilizers. Moreover, one expects that in line highly oxidizing radicals production provides the total or partial organic matter digestion for subsequent analytical determination.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SILVA, CLAUDINEIA R.; OLIVEIRA, ELIEZER; ZAGATTO, ELIAS A. G.; HENRIQUEZ, CAMELIA. A novel flow-based procedure for automation of respirometric assays in soils. Talanta, v. 158, p. 14-20, SEP 1 2016. (13/22927-9)

CRISPINO, CARLA C.; KAMOGAWA, MARCOS Y.; FERREIRA, JOSE R.; ZAGATTO, ELIAS A. G.. Sulphate radical generation through interaction of peroxymonosulphate with Co(II) for in-line sample preparation aiming at spectrophotometric flow-based determination of phosphate and phosphite in fertilizers. Talanta, v. 158, p. 270-275, SEP 1 2016. (13/22927-9, 11/23498-9)