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Assessing Methods of Removing Metals from Wastewater
The Effect of Ferric Chloride Addition
DL Sedlak, L Sedlak David, A Christianne Ridge
165,45 €
+ 330 points
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.
Spécifications
Parties prenantes
- Auteur(s) :
- Editeur:
Contenu
- Nombre de pages :
- 86
- Langue:
- Anglais
- Collection :
Caractéristiques
- EAN:
- 9781843396949
- Date de parution :
- 14-07-05
- Format:
- Livre broché
- Format numérique:
- Trade paperback (VS)
- Dimensions :
- 210 mm x 279 mm
- Poids :
- 217 g
