ARCHIVES
VOL. 6, ISSUE 1 (2022)
Heavy metals in a wild plant Pogostemon cablin growing along the highways and assessment of its phytoextraction potential for Cd, Cr, Cu, Ni and Pb
Authors
Dayadhar Dikshit, Alok Awasthi
Abstract
Due to unique ability to bio-accumulate heavy
metals several plants exhibited selective bioaccumulation of heavy metals from
metal contaminated soil, in their roots and shoots. In this study the
bio-accumulated levels of Cd, Cr, Cu, Ni and Pb were determined in the soil,
root and shoots of Pogostemon cablin Benth, Limaceae, grown
wildly on barren land along the highways. To assess the phytoextraction
potential of the P. cablin plant for studied heavy metals, valuable
factors such as BCF (bio-concentration factors), TF (translocation factors) and
BAC (biological accumulation coefficients) were evaluated by detecting the
concentrations of studied heavy metals in study area soil, roots and shoots of
the plant. The observed levels of tested metals in soil were found as: Cr
(8.86± 0.29) > Pb (7.15 ±0.26) > Ni (3.12± 0.21) >Cu (2.57± 0.19) >
Cd (0.98± 0.09, mg/Kg). Similarly, the observed levels of heavy metals in plant
roots and shoots were: Cr (10.21± 0.28) > Pb (5.38 ±0.22) > Ni (2.14±
0.19) > Cu (1.92± 0.16) > Cd (1.12± 0.13) and Cr (11.03± 0.27) > Pb
(3.83 ±0.14) > Ni (1.96± 0.13) > Cu (1.58± 0.11) > Cd (1.19± 0.09
mg/Kg), respectively. The soil to root bio-concentration factors BCF Roots
due to bio-accumulated metals in P. cablin were evaluated as: Cr (1.15)
~ Cd (1.14) > Cu (0.75) ~ Pb (0.75) > Ni (0.68). The root to shoot
translocation factors, TFShoot were: Cr (1.08)> Cd (1.06)> Ni
(0.92) > Cu (0.82) > Pb (0.71). The soil to shoot biological accumulation
coefficients (BAFShoot) evaluated were: Cr (1.24) >Cd
(1.06) > Ni (0.63) > Cu (0.60) >Pb (0.54). The high (>1) or
moderate values of BCFs, TFs and BACs computed as above for Pogostemon
cablin suggested that the plant has appreciable potential to absorb,
bio-accumulate and translocate Cd, Ni, Cu, Cr and Pb from contaminated soil and
therefore Pogostemon cablin plant is capable for moderate
phytoextraction of Cr, Cd, Ni and Cu, from contaminated soil.
Pages:36-42
How to cite this article:
Dayadhar Dikshit, Alok Awasthi "Heavy metals in a wild plant <i>Pogostemon</i> <i>cablin growing </i>along the highways and assessment of its phytoextraction potential for Cd, Cr, Cu, Ni and Pb". International Journal of Chemical Science, Vol 6, Issue 1, 2022, Pages 36-42
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