Levels of Zinc (Zn), Copper (Cu), Iron (Fe), and Cadmium (Cd) in Soil, Rice Stalk, and Oryza Sativa Grain in Ishiagu Rice Field, Ebonyi State, Nigeria; Human Health Risk

D. N. Ajah; E. Agboeze; J. N. Ihedioha; E. Chukwudi-Madu; C. C. Chime

doi:10.46481/jnsps.2022.891

Authors

D. N. Ajah Department of Industrial chemistry, Enugu State University of Science and Technology, Enugu State, Nigeria
E. Agboeze
[email protected]
Department of Industrial chemistry, Enugu State University of Science and Technology, Enugu State, Nigeria
J. N. Ihedioha Department of pure and Industrial chemistry, University of Nigeria Nsukka, Enugu State, Nigeria
E. Chukwudi-Madu Department of Industrial chemistry, Enugu State University of Science and Technology, Enugu State, Nigeria
C. C. Chime Department of Industrial chemistry, Enugu State University of Science and Technology, Enugu State, Nigeria

Keywords:

Heavy metals, Rice, Soil, Health risk, Environmental pollution

Abstract

Levels of heavy metals (Zn, Cu, Fe, Cd) were determined in soil, rice grain, and rice stalk from Federal College of Agriculture Ishiagu rice field, Ebonyi state, Nigeria. The dried samples were digested with a 1: 3 (HNO3: HCl) mixture and analyzed with atomic absorption spectrophotometer (AAS). The mean concentration of the metals in the soil before planting, soil after harvest, and rice grain were as follows: Zn (7.28, 11.33 and 24.90); Cu (3.40,4.64 and 4.14); Fe (803.04, 735.47 and 107.78); Cd (1.14, ND and ND) and were all within FEPA and FAO/WHO limits. The daily intake values for a 60 kg adult were Zn (0.04), Cu (0.01), and Fe (0.18) and were all below the recommended limits by Codex Alimentarius standards. The Target Hazard Quotient (THQ) for Zn, Cu, and Fe was less than one (1<), and the total hazard index was less than 1, indicating that the population will not be exposed to the potential health risk from these metals. However, the metal levels should be monitored to ensure they stay at harmless levels.

Dimensions

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