Removal of Pb and Zn from Soil using cowpea (Vigna unguiculata) and maize (Zea mays) Plants

This study investigated the potential of cowpea (Vigna unguiculata) and maize (Zea mays) plants to remove Pb and Zn from soil. The crops were exposed to three concentrations (100, 150 and 200 mgkg-1) of each metal salts during the study. When the plants were treated with lead nitrate at a concentrat...

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Bibliographic Details
Published inJournal of Applied Sciences and Environmental Management Vol. 22; no. 3; p. 432
Main Authors Oladele, EO, Adewumi, OO, Taiwo, IA, Odeigah, PGC
Format Journal Article
LanguageEnglish
Published Joint Coordination Centre of the World Bank assisted National Agricultural Research Programme (NARP) 11.04.2018
Subjects
Bioconcentration factor
Chelate
Phytoextraction
Phytoremediation
Translocation factor
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Summary:This study investigated the potential of cowpea (Vigna unguiculata) and maize (Zea mays) plants to remove Pb and Zn from soil. The crops were exposed to three concentrations (100, 150 and 200 mgkg-1) of each metal salts during the study. When the plants were treated with lead nitrate at a concentration of 150 mgkg-1, the amount and percentage of Pb removed and accumulated within plants’ tissues were 65.68 m mgkg-1g/kg (44.79%) and 78.93 mgkg-1 (53.0%) for cowpea and maize with bioconcentration factors 0.80 and 0.78 respectively. However, when the plants were assisted they had greater bioconcentration factors. Farmyard manure enhanced metal uptake by cowpea and maize significantly than EDTA. Maize extracted more Pb into its roots and translocated to shoots when assisted with EDTA than cowpea. Maize was able to translocate more Pb while cowpea translocated more Zn through the vascular system, thereby acting as phytoextractors for the different metals respectively.
ISSN:1119-8362
2659-1502
2659-1499
DOI:10.4314/jasem.v22i3.25