PHYTOAVAILABLILITY AND FRACTIONATION OF CADMIUM AND LEAD IN VEGETABLE FARM SOILS IN ILORIN, NORTH-CENTRAL, NIGERIA
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Date
2021-05-03
Journal Title
Journal ISSN
Volume Title
Publisher
Ife Journal of Science
Abstract
Heavy metal dynamics, bioavailability and fractionation are of great importance to measure soil toxicity,
in soil. However, reports showed that not much has been done to evaluate
these parameters in vegetable farm soils in Ilorin metropolis. These parameters aid in assessing and
extent of heavy metal viability in soil. Therefore, soils were collected from major vegetable farms in Ilorin
metropolis, sorted, Thus, this study investigated the
bioavailable Cd and Pb and their fractionation in vegetable farm soils in Ilorin metropolis. These experiments
were conducted by , sequential extraction and Atomic Absorption
Spectrophotometry, alongside analysis of some key soil properties. The results showed that the soil pH ranged
from 6.62±0.04 to 7.18±0.03, organic matter 2.05
target heavy metals in the sampling areas were potentially
bioavailable with phytoavailable concentration ranges of
. The target heavy metals showed a high viability of the soluble and
exchangeable form in most soils and in both seasons which would greatly contribute to their availability to plant
uptake and soil toxicity. There is also a threat of oxidization of the potentially available Cd and Pb in other forms
due to pH ranges of most of the studied soils. Therefore, vegetable farm soils in Ilorin metropolis are polluted
with Cd and Pb and may have high risk of causing human health problems when vegetables grown on the soils
are consumed; which calls for remediation of most of the soils.
,
Ife Journal of Science vol. 23, no. 1 (2021) 031
INTRODUCTION
Heavy metals abound naturally in soil
environment, as a result of processes of
weathering of parent materials at levels that are
regarded as trace and rarely toxic substance, and
also from human anthropogenic activities
(Herawati et al, 2010). Of the heavy metals that
abound, cadmium (Cd) and lead (Pb) are common
and widely studied contaminants because of their
spectrum of use in production of lead-acid
batteries, lead-based paints, automobiles, oil
refineries, and antiknock in petrol (Ying et al.,
2013). In terms of environmental concentration,
Pb is the heavy metal closest to the level in which
toxic signs manifest than any other substance
(Iwegbue et al., 2013).
Heavy metal distribution, dynamics and transport
in soil depend significantly on their chemical
forms (Debnárová and Doleţa, 2010). Once in the
soil, heavy metals are adsorbed by initial fast
reactions (minutes, hours)
Description
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Citation
Ben-Uwabor, P. O. *, Olawepo, G. K. , Ogunkunle, C. O. , Fatoba, O. P. (2021). PHYTOAVAILABLILITY AND FRACTIONATION OF CADMIUM AND LEAD IN VEGETABLE ' Ife Journal of Science vol. 23, no. 1 (2021) FARM SOILS IN ILORIN, NORTH-CENTRAL, NIGERIA.