POLLUTION STUDIES OF KWARI POND IN ZARIA KADUNA NIGERIA, USING SELECTED PHYSICO- CHEMICAL PARAMETERS AND HEAVY METALS.

Z. B. Abdullahi

Abstract


The physico-chemical parameters of Kwari pond water in Kwangila Zaria were investigated (from February to July 2014). The level of the metal (Cd, Zn, Mn, Cr and Pb) contamination in the pond water was analyzed also using Atomic Absorption Spectroscopy. The results of the analysis shows that temperature, salinity, conductivity and dissolved oxygen of the pond water were within Food and Agricultural Organization permissible limits for irrigation water; however, the pH range in this report is 5.80 – 9.17 which was slightly off the limits by FAO standard ranges of 6.0 – 9.0 which implies that the pond is alkaline in dry season and acidic in rainy season which may likely lead to the high concentration of the metals in the pond. The levels of 0.53, 0.94 and5.22mg/L for Cd, Mn and Cr respectively (all through the months) in the pond water were higher than the United State permissible limits for irrigation (0.01, 0.2 and 0.1mg/L respectively), while the levels of Zn was higher in the month of May only and Pb was higher in the months of May and April. The high levels of these metals is a clear indication that the pond water is polluted and may not be suitable for irrigation. The concentrations of the metals in the pond water were generally of the order Pb > Cr > Mn > Zn > Cd.

Keywords: Concentration, contamination, Heavy metals, Kwari pond water.


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Chemical Society of Nigeria