Abamectin Degradation by Advanced Oxidation Processes: Evaluation of Toxicity Reduction Using Daphnia similis

Author(s)

Guimaraes, Jose Roberto ^[1] ; Barbosa, Izabela Major ^[1] ; Maniero, Milena Guedes ^[1] ; Rath, Susanne ^[2]

Affiliation

^[1] Univ Estadual Campinas, UNICAMP, Sch Civil Engn Architecture & Urbanism, BR-13083852 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, UNICAMP, Inst Chem, BR-13084971 Campinas, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES; v. 17, n. 1, p. 82-92, JAN 2014.
• Web of Science Citations: 1

Abstract

This work evaluated the toxicity reduction of abamectin in an aqueous solution (500 mu g L-1) undergoing to photolysis (UV), peroxidation (H2O2), peroxidation with ultraviolet radiation (UV/H2O2), Fenton (Fe(II)/H2O2), and photo-Fenton (Fe(II)/UV/H2O2) processes. Toxicity trials were carried out using the microcrustacean Daphnia similis. Results were based on effective concentration, EC50 48 h. Using 1.0 mmol L-1 Fe (II) and 5.0 mmol L-1 H2O2 and a reaction time of 60 s, the ranking of efficiency for the degradation of abamectin was as follows: photo-Fenton > Fenton > UV = UV/H2O2 > H2O2. However, after a reaction time of 300 s, similar degradation was obtained for photo-Fenton, UV, and UV/H2O2 (more than 97%), while the Fenton process degraded 80% of the drug. With the exception of peroxidation, all of the processes evaluated were able to eliminate toxicity in 600 s of reaction (1.0 mmol L-1 Fe(II) and 5.0 mmol L-1 H2O2). (AU)

• FAPESP's process: 09/12641-5 - Abamectin degradation by advanced oxidation processes
• Grantee: Izabela Major Barbosa
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 08/06470-0 - DEGRADATION OF VETERINARY DRUGS
• Grantee: José Roberto Guimarães
• Support Opportunities: Regular Research Grants