Journal article
The potential use of manganese oxidation in treating metal effluents
Water Engineering Research Group, Faculty of Engineering, University of hertfordshire, Hatfield AL10 9AB, UK1
Microbiology Research Unit, University of Canberra, Belconnen 2616, Australia2
Department of Biotechnology, University of New South Wales, Sydney, 2052, Australia3
A technique of using microbially formed manganese oxides to takeup and immobilise metal effluents is described. An algal facilitated bacterial oxidation of manganese (Mn2+, which overcomes slow rates of bacteria-only manganese oxidation, was used to produced high yields of oxides using 1.6 g/L Mn2+ at neutral pH.
Metals such as Cu, Zn, Co and Ni can be immobilised in stable co-precipitated manganese oxides. This effect was achieved either by the direct addition of metals during oxidation or by pretreating algal cells with metals prior to oxidation. Acid leaching (pH 2 H2SO4) showed that the immobilised metals were tightly bound by the manganese oxides.
Transmission electron microscopy and X-ray analysis (TEM/EDAX) confirmed that bioformed manganese oxides had physically encapsulated the added metal ions, thereby preventing their release.
| Language: | English |
|---|---|
| Year: | 1996 |
| Pages: | 1253-1261 |
| ISSN: | 18729444 and 08926875 |
| Types: | Journal article |
| DOI: | 10.1016/S0892-6875(96)00120-3 |
