Abstract
Heavy metal contamination has become a serious ecological problem due to its toxic effects on soils, plants and human. Experimental study was conducted on dumpsite soil to assess the potential of Ricinus communis to accumulate heavy metals from the soil using bioconcentration (BCF) and tanslocation factors (TF). Heavy metals concentration (mg/kg) in dumpsite and control soil before planting were Mn (50.68- 220.08); Zn(29.01- 135.56); Cu (8.92- 86.88), Pb (5.88-48.86), Ni (3.01-7.99) and Co (1.78-6.88) while the concentration in soils after planting were Mn(29.89- 135.21); Zn (15.11-88.21); Cu (3.89-50.22), pb (3.68-31.56), Ni (1.22-3.56) and Co (0.67-2.68) in Mg/kg. Ricinus communis showed BCF greater than 1 for Ni and Co and less than 1 for Mn, Cu, Zn and Pb while TF is greater than 1 for all the determined heavy metals. The dumpsite soils have higher heavy metal concentration than the control soil. The levels of heavy metals concentration in soils and plants are in the order of Mn> Zn> Cu> Pb> Ni. Significant reduction (P<0.05) was observed in the heavy metal concentrations in the soils before and after planting indicating their accumulation in the plants. Results of this study indicate the accumulation of heavy metals in Ricinus communis plants and its potential for effective removal of Cu, Zn, Pb, Ni, Co and Mn from the dumpsite soils.
 Keywords: Heavy metal accumulation, Ricinus communis, Dumpsite soil, Translocation factor, Remediation
Highlights
ABSTRACTS: Heavy metal contamination has become a serious ecological problem due to its toxic effects on soils, plants and human
Results of this study indicate the accumulation of heavy metals inRicinus communis plants and its potential for effective removal of Cu, Zn, Pb, Ni, Co and Mn from the dumpsite soils
This study investigated the potential of Riccinus communis plants for removal of heavy metals in soils from Ajakanga dumpsite in Ibadan, South western Nigeria
Summary
ABSTRACTS: Heavy metal contamination has become a serious ecological problem due to its toxic effects on soils, plants and human. Akintola and Bodede (2019a) in their study indicated no to low heavy metal pollution level in the vicinity of Ajakange dumpsite and no probable health risk was observed as the total hazard index of all the heavy metals was less than one They indicated rremediation techniques should be applied to reduce the mobility of heavy metals in the contaminated soils and to decrease the likely uptake of these heavy metals by plants and oral ingestion by human in the study area. Using of plants for removal of pollutants from the soil and water is presently used as a substitute for soil clean-up (Bauddh et al, 2015) Since they respond to higher concentration of contaminants such as heavy metals by different means of indication, exclusion or accumulation of elements phytoremediation has the advantage of using the selective uptake potential of some plants through the root and rhizomes to remove or modify contaminants from the environment (Nawrot et al, 2019). This study investigated the potential of Riccinus communis plants for removal of heavy metals in soils from Ajakanga dumpsite in Ibadan, South western Nigeria
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