International Journal of Environmental Protection          
An Open Access Journal
ISSN: 2226-6437(Print)      ISSN: 2224-7777(Online)
Frequency: Annually
Editorial-in-Chief: Prof. Kevin Mickus,
Missouri University of Science & Technology, USA.
The Potential of Abelmoschus esculentus in EDTA-Asssisted Phytoextraction of Heavy Metals from Soil of Bashiri Dumpsite, Ado Ekiti, Nigeria
Full Paper(PDF, 40KB)
Abstract:
The use of fast-growing tropical plants in planning phytoextraction strategies has been documented by several researchers. The work presented here examines the effect of germination on chelate-assisted phytoextraction of heavy metals by Abelmoschus esculentus cultivated on the Bashiri dumpsite Ado Ekiti. Topsoil (0 – 15 cm) samples were randomly collected from the dumpsite, control samples were collected in similar manner at 200 m away from the dumpsite. The pH, content of organic matter, cation exchange capacity as well as heavy metals concentrations of the soil samples were determined after the soil samples were treated properly. The seedlings of Abelmoschus esculentus was cultivated in different pots (for soil with EDTA) and control pots (for soil without EDTA), these plants were subsequently nurtured maturity by daily irrigation. The plants were harvested into parts at different germination stages, after which heavy metals concentrations (Cd, Cr, Pb, Zn, Co, Cu,Fe, Mn, and Ni) were determined. The result revealed the mean pH, content of organic matter and cation exchange capacity on dumpsite of 7.50 ± 0.12, 7.8 ± 0.12%, 40.10 ± 0.11 mmol/kg, respectively. The values for pH and the organic matter were higher than those obtained from control sites. Though, heavy metals concentrations on the dumpsite were higher than control site, their values reduced considerably to maturity. Early symptoms of phytotoxicity were noticed with an application of 0.2 g/kg EDTA of soil, which only affected the biomass levels of the experimental Abelmoschus esculentus but increased the concentrations of heavy metals in the plant shoot when compared with non-chelate assisted process. However, TF, BF and RR values greater than one measure phtoextraction efficiency, an indication of the possible application Abelmoschus esculentus for phytoextraction strategies.
Keywords:Effect; Chelate Assisted; Heavy Metals; Phytoextractio; Basiri Dumpsite
Author: Awokunmi E. E.1
1.Department of Chemistry, Ekiti State University, Ado Ekiti, Nigeria
References:
  1. H. M. Chan, M. Trifonopoulos, A. Ing, O. Receveur, and E. Johnson, “Consumption of freshwater fish in Kahnawake: risk and benefits,” Environ Res., vol. 80, pp. 213 – 222, 1999.
  2. O. S. Adefemi, E. E. Awokunmi and O. A. Ibigbami, “Caladium Bicolor as Bioadsorbent for the Treatment of Industrial Effluents,” Int. J. Res. Chem. Environ., vol. 3, no. 2, pp.136 -139 (10), 2013.
  3. O. S. Adefemi, O. A. Ibigbami and E. E. Awokunmi, “Level of heavy metals in some edible plants collected from selected dumpsites in Ekiti State, Nigeria,” Global Advance Reseach Journal of Environmetal Sci. and Toxicology, vol. 1, no. 5, pp.132 – 136, 2012.
  4. A. Majid and S. Argue, “Remediation of heavy metal contaminated solid waste using agglomeration techniques,” Miner Eng, 14(11): pp. 1513 – 1525, 2001.
  5. R. L Chaney, P.G. Reeves, J.A. Ryan R. W. Simmons, R.M. Welch and J. S. Angle “An improved understanding of soil Cd risk to humans and low cost methods to phytoextract. Cd from contaminated soils to prevent soil Cd risks,” BioMetals, vol. 17, pp. 549 - 553, 2005.
  6. N. S. Bolan, B.G. Ko, C.W.N. Anderson and I. Vogeler, “Solute interactions in soils in relation to bioavailability and remediation of the environment,” 5th International Symposium, Pucon, Chile, 2008.
  7. S. P. McGrath, and F. J. Zhao, “Phytoextraction of metals and metalloids from contaminated soils,” Current Opinion in Biotechnology, vol. 14, pp. 277-282, 2003.
  8. E. E Awokunmi, O. S. Adefemi and S. S. Asaolu, “EDTA-assisted phytoextraction of heavy metals by Amaranthus hybridus cultivated on soil collected from selected dumpsites in Ekiti State, Nigeria,” International J. of Environ. Protection, vol. 4, no. 5, pp. 450 – 459.
  9. E. E. Awokunmi, S. S. Asaolu, O. O. Ajayi, and O. A. Adebayo, “The role of EDTA on heavy metals phytoextraction by Jatropha gossypifolia grown on soil collected from dumpsites in Ekiti State, Nigeria,” British J of Envi. & Climate Change, vol. 2, no. 2, pp. 153-162, 2012.
  10. A. J. M. Baker, R. O. McGrath and J. A. C. Smith, “Metal hyperaccumulator plants: A review of the ecology and physiology of a biological resource for phytoremediation of metal polluted soils,” In: N. Terry and G. Banuelos (ed): Phytoremediation of contaminated soil and waters, Lewis publishers, Boca Raton, 2000 Fl. pp. 85 – 107, 2000.
  11. Y.B. Sun, Q. X. Zhou, L. Wang and W. T. Liu, “The influence of different growth stages and dosage of EDTA on Cd uptake and accumulation in Cd-hyperaccumulator (solanium nigrum L.),” Bull. Environ. Contam. Toxicol., vol. 82: pp. 348 – 353, 2009.
  12. S. N. Whiting, J. R. Leake, S.P. McGrath and A. J. M. Baker, “Zn accumulation by Thlaspi Caerulescens from soil with different Zn availability: A pot study,” Plant soil, vol. 236, pp. 11 – 18, 2001.
  13. E. E. Okiemen, E. U. Ikhuoria and E. G. Uwamarongie-Ilori, “Comparative study of As, Cr and Cu accumulation by Maize (Zea mays L.) and Okra (Abelmoschus esculentus) plants in CCA contaminated soil,” vol. 1, no. 3, pp. 23-37, 2011.
  14. C. Hong and C. Teresa, “EDTA and HEDTA effects on Cd, Cr and Ni uptake by Heliantus annus,” Chemosphere, vol. 45, pp. 21 – 28, 2008.
  15. AOAC (Association of Official Analytical Chemists), “Official methods of analysis,” 15th ed., Arlington, Virginia, pp. 84-85, 2005.
  16. M. Aldrich, J. L. Gardea-Torresdey, J. R. Peralta-Videaand J. G. Parsons, “Uptake and reduction of Cr (VI) to Cr (III) by mesquite (Prosopis spp): chromate-plant interaction in hydroponics and solid media studied using XAS,” Environ. Sci. Technol., vol. 37, pp. 1859-1864, 2003.
  17. O. T. Oyelola and A. I. Babatunde, “Effect of municipal solid waste on the levels of heavy metals in Olusosun dumpsite, Lagos State, Nigeria,” Int. J. P. App. Sci., vol. 2, no. 1, pp. 17 – 21, 2008.
  18. Adedosu, H.O., Adewuyi, G. O. and Adie, G. U., “Assessment of heavy metals in soil, leachate and underground water samples collected from the vicinity of Olusosun landfill in Ojota, Lagos, Nigeria, ” Transnational Journal of Science and Technology, vol. 3, no. 6, 2013.
  19. E. O. Fagbote and E. O. Olanipekun, “Seasonal and depth effects on the physic-chemical parameter of the soil of farm settlements with bitumen deposit,” International Research Journal of Biotechnology, vol. 2, no. 9, pp. 198-212, 2011.
  20. A. S. Ololade, “An assessment of heavy metal contamination is soils within auto-mechanic workshops using enrichment and contamination factors with geoaccumulation indexes,” J. of Environ. Protection, vol. 5, pp. 970 – 982, 2014.
  21. M. E. Osawaru and O. Abioye, “Growth performance of Okra (Abelmoschus esculentus (L.) Moench) cultivar in soil polluted at different concentrations of spent engine oil,” vol. 13, no. 1, 2012.
  22. C. Mant, S. Costa, J. Williams, E. Tambourgi, “Phytoremediation of Chromium by model constructed wetland,” Bioresource Technol., vol. 97, pp.1767 – 1772, 2006.
  23. S. Yue-bing, Z. Qixing, A. Jing, L. Wei-tao and L. Rui, “Chelator-enhanced phytoextraction of heavy metals from contaminated soil irrigated by industrial waste water with the hyperaccumulator plant (Sedum alfredii Hence) ,” Geoderma, vol. 150, pp. 105 – 112, 2009.