4. Conclusions
From the present investigation, the main conclusions are as follows:
sodiumdiethyldithiocarbamate,ammoniumbutyl-dithiophosphate,
and n-butyl xanthate can be readily biodegraded, while
ethylthionocarbamate is difficult to be biodegraded. The biodegradation
extent in 8 d of sodiumdiethyldithiocarbamate, ammoniumbutyl-
dithiophosphate, n-butyl xanthate and ethylthionocarbamate is