Bio-Concentration and Translocation of Chromium in Soil-Plant System: Health Risks in Usangu Agro-Ecosystem
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Date
2023
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ELSEVIER
Abstract
Determination and analysis of total chromium (Cr) in soil and plant tissues help estimate the associated health
risk; however, this might overestimate the risk because not all Cr from the soil is transported to above-ground
plant tissues, mainly the edible part of most plants. Here we present the analysis of Cr partition in soils and
paddy rice plant samples which currently missing in Usangu agro-ecosystem. The bio-concentration (BF) and
translocation factors (TF) estimating the distribution and partitions of Cr in plant tissues (roots, straws, and
grains), and associated environmentally and health risks were determined in Usangu agro-ecosystem. The Cr
concentration in soils ranged from 4.58 to 42.76 mg/kg which was within maximum permissible limits (100 mg/
kg), with the total Cr in plants samples ranging from 12.88 to 57.34 mg/kg. It was found that straws and roots
had higher Cr concentrations than grains indicating a less health risk in edible parts. The BF > 1 was observed in
83.3% of the studied sites indicating higher Cr uptakes by plants. Furthermore, TF < 1 was observed in 67.33% of
the studied sites indicating more Cr accumulated in below-ground biomass (roots) than above-ground biomass
(straws and grains) (33.33%), thus less risk to edible plant parts. This study indicates that high Cr in agricultural
soils may accelerate Cr accumulation in plant tissues or above-ground plant biomass leading to health risks.
Description
This research article was published by ELSEVIER in 2023