Salt Content Determination for Bentonite Mine Spoil: Saturation Extracts Versus 1:5 Extracts
Authors: | Marguerite E. Voorhees, Daniel W. Uresk |
Year: | 2004 |
Type: | Research Note |
Station: | Rocky Mountain Research Station |
DOI: | https://doi.org/10.2737/RMRS-RN-18 |
Source: | Res. Note RMRS-RN-18. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 7 p. |
Abstract
The reliability of estimating salt content in saturated extracts from 1:5 (1spoil:5water) extract levels for bentonite mine spoil was examined by regression analyses. Nine chemical variables were examined that included pH, EC, Ca++, Mg++, Na+, K+, HCO3-, SO4-, and Cl-. Ion concentrations from 1:5 extracts were estimated with high predictability for Ca++, Mg++, Na+, SO4-, HCO3-, and EC conductivity. Overall, calculated ion concentrations from 1:5 extracts show significant relationships with saturation extracts, except for Cl- and K+. The significant relationships we found suggest that 1:5 extracts can be used to reliably estimate salinity of bentonite mine spoils with less effort and expense.Publication Web Site:
https://www.fs.usda.gov/rm/pubs/rmrs_rn018.html