STUDY NUMBER ; 11.1 



ORGANIZATION ; Montana State University (MSU), Chemistry 

 Department 



TITLE OF STUDY ; Chemical Reactions Controlling Copper 

 Transport in the Upper Clark Fork River 



CONTACT: Gordon Pagenkopf - MSU, Department of Chemistry - 

 994-4801 



OBJECTIVE ; Identify the sources and transport mechanisms of 

 copper in the upper river. Evaluate the metal coraplexation 

 capacity of the river. 



DURATION ; 1984 - 1986 



CURRENT STATUS ; Bimonthly water quality samples have been 

 Collected at several station between Warm Springs and 

 Garrision since the autumn of 1984. Samples are collected in 

 mid-channel, approximately 30 cm below the surface. A 

 portion of each sample is filtered in the field through a 

 0.22 micron filter and acidified to pH 2. Parameters 

 analyzed on all samples include specific conductivity, pH, 

 calcium, magnesium, sodium, bicarbonate, carbonate, sulfate 

 and copper. Copper species equilibria are calculated for 

 all samples. 



The results of samples collected during late 1984 and 

 early 1985 (winter conditions) were presented at the Montana 

 Academy of Sciences meeting in Butte on April 19, 1985, and 

 will be published in the Proceedings of the meeting in early 

 1986. 



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