Heavy metal enrichment and remediation potential of &lt;i&gt;Jatropha curcas&lt;/i&gt; Linn seedlings in dumpsite contaminated soil

O.O Akintola,I.A Bodede,E.K Abodurin

doi:10.4314/jasem.v23i8.8

Abstract

Heavy metals contamination in water, soil, and plants is a frightening portent around the globe and their bio- amplification through the food chain can cause dangerous health hazards. This study assessed the ability of Jatropha curcas seedlings to uptake and distributes heavy metals totheir tissue parts from dumpsite soil. Heavy metals concentration in dumpsite soils before plantings were Cu (48.01 – 356.71), Zn (39.99 – 437.88), Pb (28.42 – 260.48), Cd (0.69 – 9.75), Co (16.89 – 27.22) and Cr (20.01 – 30.11) while their concentration after planting were Cu (7.01 - 221.22), Zn (6.22- 301.99), Pb (10.26 – 225.98), Cd (0.48 – 4.01), Co (7.09 – 14.61) and Cr (9.56 – 15.89) in mg/kg. Concentration of heavy metal (mg//kg) in roots were Cu (12.99 - 28.99), Zn (11.97 – 30.22), Pb (9.51 – 17.31). Cd (0.19 - 0.99), Co (6.01 – 8.56) and Cr (8.22 – 9.56) and shoots wereCu (25.22- 46.21), Zn (26.09 – 48.01), Pb (11.46 – 17.31), Cd (0.25 – 1.23). Co (9.22 – 12.98) and Cr (10.98 – 14. 01) showed the uptake and enrichment level of heavy metals in the plants. Enrichment and distribution factors were 0.10 to 1.92 and 1.21 to 2.17 respectively. Reduction in the concentration of heavy metals after planting indicated their enrichment in the plant tissues. Medium to high values of enrichment and distribution factors indicated ability of Jatropha carcass seedlings to uptake heavy metals from the soil and distributes them into its parts. This study has further proven the potency of Jatropha curcas seedlings as phytoextractor plants.Keywords: Contamination, enrichment, heavy metals, soil

Highlights

Contamination of heavy metals from mining, smelting, tanning industries, electroplating, manufacturing, agricultural and waste disposal technologies in the environment is a major global concern despite their toxicity and threat to human life and environment ((Shanker et al, 2005; Yruela, 2005; Ceribasi andYetis, 2001; Hernandez-Ochoa et al.,2005)
Highest organic matter content were recorded in T1 than control and this can be attributed to decomposition and composting processes of the wastes deposited in the study area
The results showed that biomass production for plants gradually increased with treatments (Table 2) indicating that the amounts of heavy metals in the soils did not affect biomass production or induce phytotoxicity symptoms in the plant (Akintola and Bodede, 2019)

Summary

Introduction

Contamination of heavy metals from mining, smelting, tanning industries, electroplating, manufacturing, agricultural and waste disposal technologies in the environment is a major global concern despite their toxicity and threat to human life and environment ((Shanker et al, 2005; Yruela, 2005; Ceribasi andYetis, 2001; Hernandez-Ochoa et al.,2005). This study assessed the ability of Jatropha curcas seedlings to uptake and distributes heavy metals totheir tissue parts from dumpsite soil. Medium to high values of enrichment and distribution factors indicated ability of Jatropha carcass seedlings to uptake heavy metals from the soil and distributes them into its parts.

Results

Conclusion