Using of Chroococcus sp. to Treat Polluted Water with Cadmium & Nickel
Keywords:Biosorption, Alga, Wastewater, Cadmium, Nickel
Chroococcus sp. was exposed to different concentrations 0.3, 0.5, 1, 2, 3, 4, 5, 6 and 7 ppm, from cadmium and nickel. The results revealed that the ability of the alga to remove cadmium and nickel was increased with the increase of the metal concentration which the alga exposed to them and this case does not record before. This may relate to mechanisms of adsorption and removal which not understood perfectly till now according to many researches that concerned with this field of studies. It was noticed that the removal percentage of cadmium reaches to 77.66 & 76% in the two higher concentrations 6 & 7 ppm, which exposed to the alga till the last day (twelve days) from the experiment, but same percentage (77.66 & 76%) was recorded on the eighth day of the experiment to remove nickel and decrease to 12.5 & 28% on the last day of the experiment for the above two concentrations.
. Volesky, B. (1986). Biosorbent Materials. Biotechnol. Bioeng. Symp., 16:121-126.
. Kratochvil, D. and Volesky, B. (1998). Advanced in the biosorption of heavy metals. Trends Biotechnol., 16: 291-300.
. Gadd GM, White C, De Rome L. (1998). Heavy metal and radionucleotide uptake by fungi and yeasts, in Biohydrometallurgy, edited by P R Norris & D P Kelly (A Rowe, Chippenham Wilts, UK).
. Ahalya, N., Ramachandra, T.V., Kanamadi, R.D. (2003). Biosorption of heavy metals. Research Journal of Chemistry and Environment, 7(4): 71-79.
. Al-Saadi, H.A. and Sulaiaman (2006). Phycology. Dar Al-Yazori publications, Jordan, Amman.
. Chu, S.P. (1942). The Influence of the Mineral Composition of the Medium on the Growth of Planktonic Algae: Part I. Methods and Culture Media. J. Ecol., 30: 284-325.
. Kassim, T.I. (1998). Production of Some Phytoplankton and Zooplankton and their use as live food for fish larva. Ph.D. thesis. University of Basra.
. Patterson, G. (1983). Effect of Heavy Metals on Fresh Water Chlorophyta. Ph.D. Thesis, Durham University, England, 212pp.
. Wilke, A., Buchholz, R. and Bunke, G. (2006). Selective biosorption of heavy metals by algae. Environmental Biotechnology, 2(2):47-56.
. Ho, Y.B. (1990). Ulva lactuca as bioindicator of metal of contamination in intertidal waters in Hong Kong. Hydrobiologia, 203:73-81.
. Wong, M.H., Kwok, T.T. and Ho, K.C. (1982). Heavy metals in Ulva lactuca collected within Tolo Harbour, an almost landlocked sea. Hydrobiol. Bulletin, 16:223-230.
. Carlson, L. and B. Erlandsson (1991). Seasonal variation of radionuclides in Fucus vesiculosus L. from the Oresund, Southern Sweden. Environmental Pollution, 73(1):53-70.