Concentration of some heavy metals in the hair, kidney and liver of cattle and goats in the oil and non–oil producing areas of Ondo State

Abstract

Pollutions due to anthropogenic sources have made some animals possible carriers of certain toxic substances which could have detrimental effects on humans. In this study, the concentrations of lead (Pb), cadmium (Cd), mercury (Hg) and chromium (Cr) in the hair, kidney and liver of cattle and goats in the oil producing areas (OPA) and none oil producing areas (NOPA) of Ondo state, Nigeria, were evaluated. Hair, kidney and liver samples were collected from four purposely selected Local Government Areas in Ondo state in replicates, dried and digested using a 1:3 mixture of concentrated perchloric acid (HClO4) and trioxonitrate (v) acid (HNO3). Data collected were analyzed completely randomized design (CRD) and significant means were separated using Duncan multiple range test. Lead concentration (mg/kg) were not significantly different in the organs of cattle (mean = 0.076) and goats (mean = 0.043) in the OPA but varied significantly in the NOPA with highest values in the hair of cattle (0.081) and kidney of goat (0.056). Oil exploration effect was only significant in Pb deposition in the kidney. Cadmium values (mg/kg) ranged from 0.009 to 0.031 in cattle and from 0.010 to 0.020 in goats with no significant variation. However, oil exploration showed significant effect in the Cd deposition in the kidney of cattle. Mean values of mercury concentration (mg/kg) in cattle were between 0.022 to 0.054 and 0.029 to 0.039 in goats from the OPA. In the NOPA, Hg concentration did not vary significantly in the organs of cattle but showed significant variation in the organs of goats with values ranging from 0.016 – 0.046 mg/kg. Chromium concentration (mg/kg) varied between 0.004 to 0.020 in cattle and 0.005 to 0.025 in goats with no significant variation. Conclusively, all the heavy metal concentrations obtained from analysis of the hair, kidney and liver from both the oil producing and the non – oil producing areas were below permissible limits reported by some regulatory bodies.

Comparative Study of the Amount of Macro- And Microelements in the Content of Different Muscles of Lambs and Kids

“…The export of meat products from many countries is decreasing due to the pollution of the environment, feed, and water, as well as the higher-than-normal level of chemical elements in meat products (Kasap et al 2017;Xing et al 2019). The research has determined it conducted so far that the amount of some elements in the meat and organs of slaughtered animals is much higher than the physiological norm (de Arujo et al 2017;Schweinzer et al 2017;Egigba et al 2018;Zhang et al 2020;Derar et al 2022). The amount of chemical elements in the tissues of animals varies depending on their age, sex, and type of tissue (Johnson et al 1995).…”

Bio-monitoring of Environmental Toxicants using West African Dwarf Goats at Amawzari Mbano, Imo State, Nigeria

“…These studies are: heavy metals in selected tissues and organs of slaughtered goats from Akinyele Central Abattoir, Ibadan, Nigeria (Oladipo and Okareh, 2015), heavy metals and trace elements in the livers and kidneys of slaughtered cattle, sheep and goats from West of Iran (Bazargani-Gilani et al, 2016), survey of trace elements and some heavy metals in goats in Zaria and its environs, Kaduna State (Omoniwa et al, 2017). Furthermore, assessment of heavy metals in the blood and some selected entrails of cows, goat and pigs slaughtered at Wurukun abattoir, Makurdi, Nigeria (Ubwa et al, 2017), concentration of some heavy metals in the hair, kidney and liver of cattle and goats in the oil and non-oil producing areas of Ondo State, Nigeria (Egigba et al, 2018), assessment of heavy metals contents in goat and sheep organs from Ashaka Cements, Gombe State, Nigeria (Chadi and Abdulhameed, 2018) but none of these studies determined the concentrations of potential toxic element in fur and blood in WAD goats. This study, therefore, is aimed to determine the concentrations of heavy metals in fur and blood of WAD goats at open range husbandry (ex situ) in Amawzari Mbano in Imo State, Nigeria.…”