Effects of pesticides, respiratory inhibitors and heavy metals on phenol degrading activities on Acinetobacter sp. strain AQ5NOL 1
2011
Loh, Yung Sheng | Siti Aqlima Ahmad | Yong, Wang Fong | Mohd Yunus Abdul Shukor | Mohd Arif Syed | Nor Aripin Shamaan | Nurul lssati Mohamed
Pesticides, respiratory inhibitors and heavy metals are the most common pollutants found in industrial effluents, rivers, and runoff waters from landfills and can seriously affect efforts to bioremediate phenols using microbes. Therefore, the strains used for biodegradation of phenols should be not only highly active against phenols, but they should also be resistant to the co-pollutants present in the effluent. At present, cells immobilised in calcium alginate are widely used to increase the efficiency of bioremediation. Hence studies were carried out to determine the effects of selected pesticides, respiratory inhibitors and heavy metals at a concentration of 1 ppm on phenol degradation of 0.5 g/L by immobilized Acinetobacter sp.strain AQ5NOL 1 in calcium alginate beads. Results from this study showed that complete degradation of phenols in immobilised cells occurred after 28 hrs of incubation. Pesticides, respiratory and heavy metals such as Cu, Ni, Co and Pb used in this study did not produce any effect on phenol-degrading activities. Only the presence of Hg inhibited phenoldegrading activities (p>0.005).
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