ELABORATION OF A METAL RELEASE TEST FOR MASSIVE METAL SHEET - EFFECT OF DIFFERENT PARAMETERS ON THE COPPER RELEASE

摘要

A laboratory set-up has been elaborated to enable the generation of reproducible and accurate data on metal release from massive or particulate metallic samples, defining the optimum conditions according to the OECD transformation/dissolution protocol. The OECD T/D protocol has been developed to evaluate short term and long term aquatic toxicity of soluble and available metal-ionic species released from metals and sparingly soluble inorganic metal compounds in aqueous media at laboratory conditions. The influence of different experimental parameters on the metal release process has been thoroughly investigated by varying critical parameters of the OECD test; immersion time, temperature, agitation, solution pH, aging time, preparation procedure and sample surface area to solution volume ratio. Even within the limits, set by the protocol for each parameter, the degree of metal release varies significantly.