Do water sampling techniques affect aluminum speciation?
PI: Ken Johnson Project Summary Certain species of aluminum (Al) are toxic to Atlantic salmon. This project will analyze the effects of different water sampling techniques on Al speciation in the Dennys River in downeast Maine. Objectives The Dennys River in Edmunds Township, Washington County, Maine is a potential site for a calcium enhancement experiment (CEDAR), funded and directed by the National Oceanic and Atmospheric Administration (NOAA). The objective of the CEDAR project is to characterize water chemistry of the Dennys River prior to any chemical additions and then to monitor those conditions after the addition. One expected outcome of the CEDAR project is the reduction of the magnitude of pH depressions during rain events. This change in pH will change Al speciation, very important to Atlantic salmon because of the toxic nature of some species of Al. This project will assess the validity of the water sampling and processing techniques currently in place for accurate Al speci
