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EVALUATION OF HEAVY METAL CONCENTRATION AND POLLUTION INDEX IN DUST SAMPLES IN KADUNA METROPOLIS

2023; Volume: 7; Issue: 6 Linguagem: Inglês

10.33003/fjs-2023-0706-2079

2616-1370

M. U. Henry, U. I. Henry, Shakirdeen Mayowa Obidola, O. Dogun, Ruth Ajibola Ogenyi, Joseph Kokari Bulus, Sheyi Akintunde, Joshua Lekduhur,

Water Quality and Pollution Assessment

Air pollution status has undergone changes in the levels of pollutants and control measures to reduce them.This study aimed at evaluating the heavy metal concentration and pollution index in dust samples in Kaduna metropolis.Dust samples were collected from the atmosphere using well improvised polythene bags from Nigerian Bottling Company (NBL), KASUPDA, Stadium roundabout, Secretariat and Millennium City.Samples were analyzed for Pb, Cu, Zn, Cd, Co, Fe, Mn and Ni and for pollution index (enrichment factor, geoaccumulation index, contamination factor and degree of contamination).Heavy metal concentration result showed significant difference (p ≤ 0.05) in the different locations examined.All the metals analyzed recorded the highest concentration in KASUPDA > NBL > Stadium roundabout > Secretariat > Millennium city.The enrichment of the heavy metals showed minimally to moderately enriched in all study sites, ranging from 10.36 -20.30.Cadmium was anomalously enriched in all the study sites, ranging from 700.71-1000.All heavy metals were in the range of unpolluted to moderately polluted (0.00-2.77) except for Cd which was strongly polluted with the range of 0.01 -4.17.Pb, Cu, Zn, Co, Fe, Mn and Ni had low contamination factors and ranged from 0.01 -0.40 except Cd which showed very high contamination factor (13.82 -20.78).The degree of contamination (Cdeg) for each site showed range of moderate to considerable degree of contamination (14.12 -21.93).KASUPDA recorded the highest value of 21.93, though, with considerable degree of contamination.Conclusively, contamination of air and air pollution by heavy metals is more pronounced in the industrial areas of Kaduna which can be checked through government policies and the use of modern equipments to minimize the pollution.