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|Title:||Abamectin degradation by advanced oxidation processes: evaluation of toxicity reduction using daphnia similis|
|Author:||Guimarães, José Roberto|
Barbosa, Izabela Major
Maniero, Milena Guedes
|Abstract:||This work evaluated the toxicity reduction of abamectin in an aqueous solution (500 μg 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)|
|Editor:||Science & Technology Network|
|Appears in Collections:||IQ - Artigos e Outros Documentos|
IQ - Artigos e Outros Documentos
FEC - Artigos e Outros Documentos
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