US EPA

7431628 

Journal Article 

Competitive degradation and detoxification of carbamate insecticides by membrane anodic Fenton treatment 

Wang, Q; Lemley, AT; , 

2003 

Yes 

Journal of Agricultural and Food Chemistry
ISSN: 0021-8561
EISSN: 1520-5118 

AMER CHEMICAL SOC 

WASHINGTON 

51 

18 

5382-5390 

English 

12926887 

10.1021/jf034311f 

WOS:000184941500031 

https://pubs.acs.org/doi/10.1021/jf034311f
Exit
 

The competitive degradation of six carbamate insecticides by membrane anodic Fenton treatment (AFT), a new Fenton treatment technology, was carried out in this study. The carbamates studied were dioxacarb, carbaryl, fenobucarb, promecarb, bendiocarb, and carbofuran. The results indicate that AFT can effectively degrade these insecticides in both single component and multicomponent systems. The carbamates compete for hydroxyl radicals, and their kinetics obey the previously developed AFT kinetic model quite well. Hydroxyl radical reaction rate constants were obtained, and they decrease in the following order: dioxacarb approximately carbaryl > fenobucarb > promecarb > bendiocarb > carbofuran. The AFT is shown to have higher treatment efficiency at higher temperature. Degradation products of the carbamates were determined by gas chromatography/mass spectrometry, and it appears that degradation can be initiated by hydroxyl radical attack at different sites in the molecule, depending on the individual structure of the compound. Substituted phenols are the commonly seen degradation products. The AFT treatment can efficiently remove the chemical oxygen demand of the carbamate mixture, significantly increasing the biodegradability. Earthworm studies show that the AFT is also an effective detoxification process. 

Anodic; Bendiocarb; Carbamate; Carbaryl; Carbofuran; Degradation; Detoxification; Dioxacarb; Earthworm; Fenobucarb; Fenton; Insecticide; Promecarb; Toxicity; Wastewater treatment; bendiocarb; carbamate insecticide; carbaril; carbofuran; dioxacarb; fenobucarb; hydroxyl radical; phenol derivative; promecarb; unclassified drug; anodic fenton treatment; article; biodegradability; chemical reaction kinetics; degradation; detoxification; earthworm; gas chromatography; high temperature; kinetics; mass spectrometry; model; technology; waste management; Animals; Biodegradation, Environmental; Carbamates; Hydrogen Peroxide; Hydroxyl Radical; Insecticides; Iron; Kinetics; Oligochaeta; Temperature; Waste Management; Pheretima sieboldi