with the highest removal of Cd (42%). The study revealed that the selected bacterial species are resistant to Cu, Cr, Cd, Co, Ni (copC, chrB, cnrA3 and nccA) while the protozoan species were resistant to only Cu, Cr, Co and Ni (copC, chr, cnrA3) with Peranema sp. being the only protozoan species able to resist Co and Ni. Moreover, the removal efficiency of test isolates was revealed, possibly due to biosorptive (passive) uptake and bioaccumulation (active uptake). Similar to the bacterial species (Pseudomonas putida and Bacillus licheniformis),
Peranema sp. (protozoan species) has a potential application for the bioremediation of heavy metals CFTR modulator from domestic and industrial wastewater with moderate concentrations of heavy metals. This study is Selonsertib in vitro one of the rare CH5183284 studies screening the effects of complex media containing heavy metals on members of two different kingdoms and also screening their heavy-metal removal ability. Further studies could be carried out with regards to these protozoan species, especially Peranema sp., in order to establish the mechanisms used to accumulate and detoxify heavy metals. Acknowledgement The authors are grateful to the National Research Foundation (NRF) for the funding of this project (Grant number: M590). References 1. Savenije HHG, Van der Zaag P: Conceptual framework for the
management of shared river basins; with special reference to the SADC and EU. Water Policy 2000, 2:9–45.CrossRef 2. Van Vuuren L: The state of water in South Africa – Are we heading for a crisis? The Water Wheel 2009,8(5):31–33. 3. Momba MNB, Sibewu M: Survival of somatic and F-RNA
coliphages in treated wastewater effluents and their impact on viral quality of the receiving water bodies in the Eastern Cape Province. J Biol Sci 2009,9(7):648–654.CrossRef 4. Jern WNG: Industrial wastewater treatment. Singapore: Imperial College Press; 2006. 5. Diels L, Van der Lelie N, Bastiaens L: New development in treatment of heavy metal contaminated soils. Rev Environ Sci Biotechnol 2002, 1:75–82.CrossRef 6. Gikas Teicoplanin P: Single and combined effects of nickel (Ni(II)) and cobalt (Co(II)) ions on activated sludge and on other aerobic microorganisms: a review. J Hazard Mater 2008,159(2–3):187–203.PubMedCrossRef 7. Fatta-Kassinos D, Kalavrouziotis IK, Koukoulakis PH, Vasquez MI: The risks associated with wastewater reuse and xenobiotics in the agroecological environment. Sci Total Environ 2011,408(19):3555–3563.CrossRef 8. Madoni P, Davoli D, Gorbi G, Vescovi L: Toxic effect of heavy metals on the activated sludge protozoan community. Water Res 1996,30(1):135–141.CrossRef 9. Adeniji A: Bioremediation of arsenic, chromium, lead and mercury. Washington: US Environmental Protection Agency, Office of Solid Waste and Emergency Response Technology Innovation Office; 2004. 10.