Assessment of heavy metals bioaccumulation and health risk in crops grown in farmlands around mining sites in Gwana, Alkaleri lga, Bauchi state, Nigeria

Analysis was carried out on farm crops (Guinea corn, Millet and Beans) collected from adjourning farmlands around mining area of Gwana in Alkaleri Local Government Area, Bauchi State. Their heavy metal concentrations were determined quantified using Atomic Absorption Spectroscopy (AAS). The characterization revealed the presences copper, iron, lead, manganese, nickel zinc crops. mean values elements that where obtain for nickel, silver by AAS are 33.90, 12.00, 71.43, 12.56, 4.40, 0.60 101.96 mg/kg, respectively. From variance (ANOVA) used to compare these levels metals crops, it showed there a significant difference their concentration. Exposure assessment risk present bioaccumulation coefficient are1.24, 0.03, 1.68, 0.80,1.64, 0.89 1.21 estimated daily intake rate 1.17 1.28 0.03 0.04 0.06 0.011 1.39 1.96 1.92 3.14 mg/kg 1.18 1.26 hazard quotient 0.57–1.31, 0.01–0.02, 22.95–32.50, 0.07–0.12, 0.02–0.26 0.32–0.40 carcinogenic lead 0.0003–0.0011 0.0006–0.0089 It is hereby recommended crop samples within catchment areas understudy should be subjected clinical trials evaluate extent damage can cause body tissues.