Effect of copper binding by suspended particulate matter on toxicity

摘要

The kinetics of Cu(II) interactions with Susquehanna River(mid-Atlantic, USA) particle suspensions using the copper ion selective electrode(Cu-ISE) method indicated that the concentration of Cu~2+ in both the suspension and filtrate was kinetically controlled; the reaction of Cu(II) in the suspension was faster than that in the filtrate. Bioassay tests were performed in continuous flow-through bioassay systems to examine the effect of kinetics of Cu(II) interactions with suspended solids on the toxicity of Cu to Ceriodaphnia dubia. The toxicity curves were displaced to higher total Cu concentration as the reaction time increased, indicating that such interaction of Cu with solids was time dependent.