Abstract
In this study, the correlations of concentrations in sediment heavy metals between two pretreatment methods, total di-gestion and aqua regia digestion, have been investigated. Total 43 samples had been collected from streams and lakes in Yeongsan and Seomjin watersheds. They were decomposed in two pretreatment methods and five metal components (Cd, Cr, Ni, Pb, Zn) wereanalyzed. Overall average concentrations of heavy metals were Zn>Cr>Pb>Ni>Cd in the order. The concentrations of aqua regia digestion were 35.0% (Cd), 53.8% (Cr), 66.2% (Ni), 64.4% (Pb) and 76.4% (Zn) of the concentrations of total digestion and heavymetal concentrations of total digestion were higher. Heavy metal concentrations in sediments from lakes were higher than those fromstreams. The correlation equations between the concentrations of total digestion and aqua regia digestion were obtained. The concen-trations of Zn and Ni, which showed strong linear correlations, increased in aqua regia digestion as the concentration in total digestion increased. The linear correlation coefficients between two digestion methods for most analyzed metals were above the average correlation. However, these results can be applied with limitations due to heterogeneity of sediments.
| Translated title of the contribution | Correlation of Heavy Metal Concentrations between Total Digestion andAqua Regia Digestion for Sediments from Yeongsan and Seomjin Watersheds |
|---|---|
| Original language | Korean |
| Pages (from-to) | 32-38 |
| Number of pages | 7 |
| Journal | 대한환경공학회지 |
| Volume | 33 |
| Issue number | 1 |
| State | Published - Jan 2011 |