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https://hdl.handle.net/11681/24962| Title: | Investigation and evaluation of the performance of solidified cellulose and starch xanthate heavy metal sludges |
| Authors: | Bricka, R. Mark. |
| Keywords: | Factory and trade waste--Environmental aspects Starch xanthate--Environmental aspects |
| Publisher: | Environmental Laboratory (U.S.) U.S. Army Engineer Waterways Experiment Station. |
| Series/Report no.: | Technical Report;EL-88-5 |
| Abstract: | This report presents the results of a laboratory investigation that evaluated the potential for metals to leach from cellulose and starch xanthate sludges and compares the results to the metal leaching characteristics of hydroxide precipitated sludge. Sludges were prepared using cellulose xanthate, starch xanthate, or calcium hydroxide to treat a synthetic waste solution containing four heavy metals (Cd, Cr, Ni, Hg) in a laboratory-scale study. Sludges were solidified with portland type I cement. Solidified and unsolidified sludges resulting from starch xanthate, cellulose xanthate, and hydroxide precipitation processes were tested for their physical and chemical characteristics. Physical tests performed on the solidified and unsolidified xanthate and hydroxide sludges included unconfined compressive strength and cone index tests. Chemical leaching characteristics of the unsolidified and solidified sludges were determined using the US Environmental Protection Agency's extraction procedure test and a serial graded batch extraction procedure. Physical test results from this study indicated that when compared to the unsolidified sludges, solidified sludges exhibited improved handling properties, The chemical leaching test results indicated that: (a.) cellulose and starch xanthate sludges resulted in materials with a greater capacity to reduce the leaching of metals than the hydroxide sludges, (b.) Hg was the only contaminant observed in the leachate of the solidified hydroxide sludge at significant concentrations, and (c.) solidification of the sludges appeared to reduce the leaching of Cd, Ni, and Hg. |
| URI: | http://hdl.handle.net/11681/24962 |
| Appears in Collections: | Technical Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| TR EL-88-5.pdf | 4.53 MB | Adobe PDF |  View/Open |