Separation of calcium and cadmium by electrodialysis in the presence of ethylenediaminetetraacetic acid

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399808545040· OSTI ID:292995

Kubal, M; Machula, T; Strnadova, N ^[1]

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1. Inst. of Chemical Technology, Prague (Czech Republic). Dept. of Environmental Chemistry

The separation of calcium and cadmium ions in a system containing ethylenediaminetetraacetic (EDTA) as the complexing agent has been studied using a laboratory-scale batch electrodialyzer. The theoretical distribution diagram constructed for the Ca-Cd-EDTA system suggested that cadmium preferably formed negatively charged complexes while calcium remained in the positively charged uncomplexed form. The experimental results confirmed that under the influence of an electric field, calcium was exclusively transported to the cathode while more than 90% of cadmium totally removed from the middle compartment of the batch electrodialyzer migrated toward the anode. The separation effect resulting from EDTA complexation was studied within the 1.5--4.0 pH range.

• Sponsoring Organization: USDOE
• OSTI ID: 292995
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 13 Vol. 33; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
CADMIUM
CALCIUM
EDTA
ELECTRODIALYSIS
EXPERIMENTAL DATA
WASTE WATER
WATER TREATMENT