Event Title
pH on Metal Conc. in Sediment Associated Water
Location
CSU Ballroom
Start Date
2-4-2019 10:00 AM
End Date
2-4-2019 11:30 AM
Student's Major
Biological Sciences
Student's College
Science, Engineering and Technology
Mentor's Name
Steven Mercurio
Mentor's Department
Biological Sciences
Mentor's College
Science, Engineering and Technology
Description
The effect of pH on metal concentrations in sediment associated water and temperature as snow melt and water temperature (likely going to play a significant role here that did not happen in the marine study) by Rapidan Dam and other sites in Minnesota River. Four sampling sites were present in the field when collecting water samples, the first, upriver of the Sibley Park confluence of the Minnesota and Blue Rivers as a control site as with an upstream control site from the Rapidan Dam. These control sites were chosen so that the disturbance of sediment from either the dam or the confluence could bring about higher pH levels. The other two sites were before the dam where the ice was thawed out due to jet streams of water being pushed up by a pump, which could cause a disturbance in the sediment. The confluence site was the same concept where there wasn't any ice where the two rivers met.
At low water temperatures (-1 to -2 °C) and air temps (-6 to 5 °C), all of the sampling sites had the same divalent metal concentrations of 10 ppb. The upstream Judson crossing of the Minnesota River site had significantly higher pH of 8.0 than sites influenced by the Blue Earth River which had from pH values that ranged from 7.6 to 7.8. This may be significant if the divalent metal ion concentrations rise faster in the more acidic Blue Earth River.
pH on Metal Conc. in Sediment Associated Water
CSU Ballroom
The effect of pH on metal concentrations in sediment associated water and temperature as snow melt and water temperature (likely going to play a significant role here that did not happen in the marine study) by Rapidan Dam and other sites in Minnesota River. Four sampling sites were present in the field when collecting water samples, the first, upriver of the Sibley Park confluence of the Minnesota and Blue Rivers as a control site as with an upstream control site from the Rapidan Dam. These control sites were chosen so that the disturbance of sediment from either the dam or the confluence could bring about higher pH levels. The other two sites were before the dam where the ice was thawed out due to jet streams of water being pushed up by a pump, which could cause a disturbance in the sediment. The confluence site was the same concept where there wasn't any ice where the two rivers met.
At low water temperatures (-1 to -2 °C) and air temps (-6 to 5 °C), all of the sampling sites had the same divalent metal concentrations of 10 ppb. The upstream Judson crossing of the Minnesota River site had significantly higher pH of 8.0 than sites influenced by the Blue Earth River which had from pH values that ranged from 7.6 to 7.8. This may be significant if the divalent metal ion concentrations rise faster in the more acidic Blue Earth River.
Recommended Citation
Stedman, Hunter. "pH on Metal Conc. in Sediment Associated Water." Undergraduate Research Symposium, Mankato, MN, April 2, 2019.
https://cornerstone.lib.mnsu.edu/urs/2019/poster-session-A/31
