Phosphate ore washing by Na2EDTA for cadmium removal: Optimization of the operating conditions

• Authors: Zahia Benredjem , Rachid Delimi , Assia Khelalfa
• Languages of publication: EN

Abstracts

EN

This paper discusses the extraction of cadmium from phosphate ore by the washing method. Various parameters were investigated for the cadmium extraction from phosphate ore. The results from extraction tests showed that cadmium extraction depends on the nature and concentration of the extracting agent, the liquid/phosphate ore ratio, the temperature and the solution pH. The effi ciency of the nine extracting agents for removing cadmium from phosphate ore was found to be in the order: Na2EDTA > citric acid > tartric acid > ammonium citrate > calcium chloride > ammonium acetate > ammonium chloride > oxalic acid > ammonium hydroxide. In this study cadmium extraction kinetics was best described by the product layer diffusion control model.

Keywords

EN

Phosphate ore washing; Cadmium; Environment; Extraction; Chemical processes; Optimization.

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2012
• Volume: 14
• Issue: 3
• Pages: 15-20

Dates

published

1 - 10 - 2012

received

accepted

online

31 - 10 - 2012

Contributors

author

Zahia Benredjem

• University Badji Mokhtar Annaba, Laboratory of water treatment and valorization of industrial wastes, Chemistry Departmemt, Faculty of Sciences, BP 12 Annaba 23000 (Algéria)

author

Rachid Delimi

• University Badji Mokhtar Annaba, Laboratory of water treatment and valorization of industrial wastes, Chemistry Departmemt, Faculty of Sciences, BP 12 Annaba 23000 (Algéria)

author

Assia Khelalfa

• University Badji Mokhtar Annaba, Laboratory of water treatment and valorization of industrial wastes, Chemistry Departmemt, Faculty of Sciences, BP 12 Annaba 23000 (Algéria)

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Identifiers

DOI

10.2478/v10026-012-0079-0