ISSN:
1573-0972
Keywords:
Cadmium
;
copper
;
phosphate
;
shock loading
;
total organic carbon
;
toxicity
;
zinc
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Abstract The effect of shock-loading of zinc, copper and cadmium ions on the removal of total organic carbon (TOC) and phosphate in an anaerobic-aerobic activated sludge process was investigated. TOC removal was not sensitive to shock-loading of Zn2+ and Cd2+ ions, and complete removal was achieved even at 20 mg Zn2+/l and 20 mg Cd2+/l. However, with over 1 mg Cu2+/1 TOC removal efficiency decreased. PO inf4 sup3- removal, in contrast, was extremely sensitive to these metal ions, with the threshold being 1 mg Zn2+/l and 1 mg Cd2+/l. Higher concentrations adversely affected PO inf4 sup3- removal. Copper again proved detrimental; no PO inf4 sup3- removal was achieved even at 1 mg Cu/l. These results highlight the sensitivity of the removal efficiencies of TOC and PO inf4 sup3- to shock loadings of these heavy metals.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00414870
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