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Table 6 Enrichment factor for water samples using iron (Fe) as a reference element for average

From: Effects of columbite/tantalite (COLTAN) mining activities on water quality in Edege-Mbeki mining district of Nasarawa state, North Central Nigeria

Location/site Source Enrichment factor (EF)
Ni Mn Pb Cd
Edege-Mbeki Well 0.477 0.259 38.62 11.52
Mining ponds 0.729 0.035 5.12 1.19
Mararaban-Edege (control) Well 2.63 0.39 20.07 21.38