PJB-2019-934
Heavy metals Contamination in cabbage Brassica oleracea L irrigated with waste water in Katsina, Northwest Nigeria
Abidina Abba
Abstract
Abstract The study of heavy metals contamination in cabbage and Soil at Katsina, Northwest Nigeria was conducted in which five heavy metals (Pb, Cr, Zn Fe and Cd) were analysed using a standard procedure. The result summary indicates Cd 13.33(mg/kg) and Zn 11.92(mg/kg) were the highest in the cabbage biomass, while Fe, Pb and Chromium are the least metals observed. However, the metals concentration in the soil indicates high concentrations in Fe, Cr and Cd while Pb and Zn have the least concentrations. On the basis of sampling locations it was observed that sampling station B and C had the highest overall metals concentration than Station A P>0.05. The pearson’s correlation analysis between metals concentration in cabbage and soil on the other hand indicates strong positive relationship in Cd and Zinc only while for Cr, Pb and Fe it shows weak or negative relationship. We also evaluate the Bioconcentration factor where Fe (1.4)>Cr (1.37)>Pb (1.02)>Cd (0.49)>Zn (0.38). The study also find out that the level of heavy metals were above the WHO/FAO guidelines for heavy metals in irrigated vegetables. As such we recommend integrated monitoring of the waste water before used for irrigational purposes, more public awareness by the authorities and pressure groups as well as the providing of an alternative source of water by the authorities. Key words: Heavy metal, Public health, Northwest Nigeria, pollution.
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