Effect of sampling method on contaminant measurement in pore-water and surface water at two uranium operations: can method affect conclusions?

Environmental Monitoring and Assessment
Erin L Robertson, Karsten Liber

Abstract

This paper describes a comparison of two methods of sediment pore-water sampling and two methods of surface water sampling that were used in a broader investigation of cause(s) of adverse effects on benthic invertebrate communities at two Saskatchewan uranium operations (Key Lake and Rabbit Lake). Variables measured and compared included pH, ammonia, DOC, and trace metals. The two types of sediment pore-water samples that were compared are centrifuged and 0.45-microm filtered sediment core samples vs. 0.2-microm dialysis (peeper) samples. The two types of surface water samples that were compared are 53-microm filtered Van Dorn horizontal beta samples vs. 0.2-microm dialysis (peeper) samples. Results showed that 62% of the sediment core pore water values were higher than the corresponding peeper pore-water measurements, and that 63% of the Van Dorn surface water measurements were lower than corresponding peeper surface water measurements. Furthermore, only 24% and 14% of surface water and pore-water measurements, respectively, fell within +/-10% range of one another; 73% and 50%, respectively, fell within +/-50%. Although somewhat confounded by differences in filtering method, the observed differences are believed to primarily b...Continue Reading

References

Sep 24, 2002·International Journal of Radiation Oncology, Biology, Physics·Steven E SchildJames R Jett
Feb 20, 2003·Bulletin of Environmental Contamination and Toxicology·Y-J An, D H Kampbell
Mar 23, 2005·Environmental Toxicology and Chemistry·Uwe BorgmannD George Dixon
Oct 19, 2007·Environmental Toxicology and Chemistry·Erin L Robertson, Karsten Liber

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Citations

Aug 15, 2012·Environmental Monitoring and Assessment·Luke H MacDonaldPeter R Jaffé

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