Radiolytic degradation of carbaryl in aqueous solution by gamma-irradiation/HO process.

In this study the synergetic effect of gamma-ray and hydrogen peroxide on the degradation of carbaryl in aqueous solution were investigated. Aqueous solution of carbaryl was exposed to five different irradiation doses in the presence and absence of hydrogen peroxide. The intermediate species and aliphatic acids formed during irradiation were determined by Gas chromatography-Mass spectrometer and Ion Chromatography, respectively.

The effect of ozonation on the degradation of carbaryl in aqueous solution.

The aim of this study is to investigate the synergetic effect of ozonation on ultraviolet irradiation on the degradation of carbaryl (CBL) (1-naphthyl-N-methylcarbamate) in aqueous solutions (40 mg L). The degradation of CBL and the intermediates formed during ozonation were determined by gas chromatography-mass spectrometer. The change in formaldehyde, dissolved oxygen, pH, and total acidity were determined as a function of ozonation time.

Degradation of N-Nitrosodiethylamine in aqueous solution by gamma-irradiation.

N-Nitrosodiethylamine (NNDEA) is a toxic compound which is affranchised into the medium mostly via industrial wastewater. For the investigation of degradation mechanism of NNDEA, the aqueous solutions of NNDEA were exposed to Advanced Oxidation processes (AOP's) such as gamma-irradiation, ozonation, UV irradiation and UV/Ozone (ozone effect) and UV/H2O2 (hydrogen peroxide effect). Since the structure of NNDEA is small, it is rapidly degraded in all processes except UV-irradiation process but forming acetic acid and formic acid just was seen in gamma and UV/HOprocesses.