Comparison of experimental methods for determination of XXXX and biodegradability of xenobiotic compounds.

@entity44561 @entity24502 @entity137 @entity17031 @entity14457 @entity73065 @entity29359 @entity16648 @entity3878
Different methods for determining the @entity137 and biodegradability of hazardous compounds evaluating their susceptibility to biological treatment were studied. Several compounds including @entity16648 and herbicides have been evaluated. @entity137 was analyzed in terms of EC50 and by a simple respirometric procedure based on the OECD Method 209 and by the Microtox   bioassay. The values of EC50 obtained from respirometry were in all the cases higher than those from the Microtox   test. The respirometric inhibition values of @entity16648 were related well with the number of @entity3878 atoms and their position in the aromatic ring. In general, herbicides showed lower inhibition, being alachlor the less toxic from this criterion. For determination of biodegradability an easier and faster alternative to the OECD Method 301, with a higher biomass to substrate ratio is proposed. When this test was negative, the Zahn-Wellens one was performed in order to evaluate the inherent biodegradability. In the fast test of biodegradability, @entity73065 and @entity44561 showed a complete biodegradation by an unacclimated sludge upon 48 h. These results together with their low respirometric inhibition, allow concluding that these compounds could be conveniently removed in a WWTP. @entity17031 , @entity29359 , @entity24502 and @entity14457 showed a partial biodegradation upon 28 days by the Zahn-Wellens inherent biodegradability test.
