From Coastal Wiki
Revision as of 10:48, 23 September 2009 by Daphnisd (talk | contribs) (ref)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
Definition of Persistent:
Persistency is one of 3 important criteria used to asses the environmental impact of a chemical substance. The other 2 are bioaccumulation and toxicity. According to OSPAR criteria a supstance is considered to pesist in the marine environment when has a half-life above 50 days. [1]
This is the common definition for Persistent, other definitions can be discussed in the article