| Assessing Methods of Removing Metals from Wastewater: The Effect of Ferric Chloride Addition Contributor(s): Sedlak, DL (Author), Sedlak David, L. (Author), Ridge, A. Christianne (Author) |
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ISBN: 1843396947 ISBN-13: 9781843396949 Publisher: Water Environment Research Foundation OUR PRICE: $184.30 Product Type: Paperback Published: July 2005 * Not available - Not in print at this time * |
| Additional Information |
| BISAC Categories: - Science | Chemistry - Industrial & Technical - Technology & Engineering | Environmental - General - Science | Environmental Science (see Also Chemistry - Environmental) |
| Dewey: 628.3 |
| LCCN: 2006531360 |
| Series: Werf Report |
| Physical Information: 0.18" H x 8.25" W x 11" (0.48 lbs) 86 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: The presence of cationic pollutant metals in municipal wastewater effluent is a concern because stringent discharge requirements cannot always be met with conventional treatment methods. Attempts to improve metal removal are often unsuccessful because a significant fraction of the cationic metals are complexed by the synthetic chelating agent ethylenediamine tetraacetic acid (EDTA). To identify practical approaches for improving metal removal, an analytical method for measuring metal-EDTA complexes was used to survey metal speciation at a series of wastewater treatment plants. Following these analyses, bench-scale experiments were conducted. The survey data indicated that pollutant metal-EDTA complexes account for a significant fraction of the dissolved metals in wastewater. The bench-scale studies indicated that ferric chloride addition improves the removal of copper and zinc by approximately 20%. To test the results of the bench-scale experiments, a full-scale experiment was conducted by interrupting chemical addition at a municipal wastewater treatment plant that normally adds ferric chloride during primary treatment. |