Prediction of Metals Available to Maize Seedlings in Crude Oil Contaminated Soil

Authors: Stella O. Olubodun, George E. Eriyamremu

Abstract:

The study assessed the effect of crude oil applied at rates, 0, 2, 5, and 10% on the fractional chemical forms and availability of some metals in soils from Usen, Edo State, with no known crude oil contamination and soil from a crude oil spill site in Ubeji, Delta State, Nigeria. Three methods were used to determine the bioavailability of metals in the soils: maize (Zea mays) plant, EDTA and BCR sequential extraction. The sequential extract acid soluble fraction of the BCR extraction (most labile fraction of the soils, normally associated with bioavailability) were compared with total metal concentration in maize seedlings as a means to compare the chemical and biological measures of bioavailability. Total Fe was higher in comparison to other metals for the crude oil contaminated soils. The metal concentrations were below the limits of 4.7% Fe, 190mg/kg Cu and 720mg/kg Zn intervention values and 36mg/kg Cu and 140mg/kg Zn target values for soils provided by the Department of Petroleum Resources (DPR) guidelines. The concentration of the metals in maize seedlings increased with increasing rates of crude oil contamination. Comparison of the metal concentrations in maize seedlings with EDTA extractable concentrations showed that EDTA extracted more metals than maize plant.

Keywords: Availability, crude oil contamination, EDTA, maize, metals.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1111895

References:

[1] B. O. Akpovire, “Education against environmental pollution in Nigeria. Convergence,” 22(4): 55 – 60, 1989.
[2] P. H. Albers, “Petroleum and individual polycyclic aromatic hydrocarbons,” In: D. J. Hoffman, B. A. Rattner, C. A. Burton, and J. Cairns, (Eds). Handbook of Ecotoxicology. Lewis Publishers, Boca Raton. 330 – 355, 1995.
[3] N. A. Obasi, E. I. Akubugwo, K. M. Kalu, A. E. Ugbogu, and U. C. Okorie, “Toxicological assessment of various metals on selected edible leafy plants of Umuka and Ubahu dumpsites in Okigwe of Imo State,” Nigeria. Journal of Experimental Biology and Agricultural Sciences, 1(6); 441-453, 2013.
[4] C. Wu, and L. Zhang, “Heavy metal concentrations and their possible sources in paddy soils of a modern agricultural zone, south eastern China,” Environmental Earth Science, 60: 45-56, 2010.
[5] O. M. Adedokun, and A. E. Ataga, “Effects of amendments and bioaugumentation of soil polluted with crude oil, automotive gasoline oil, and spent engine oil on the growth of cowpea (Vigna unguiculata L. Walp),” Scientific Res. Essay, 2(5):197-149, 2007.
[6] A. Kabata-Pendias, “Soil-plant transfer of trace elements: an environment issue,” Geoderma, 122: 143-149. 2004.
[7] E. E. Ukpebor, and C. A. Unuigbe, “Heavy Metals Concentration in the Subsoil of Refuse Dump Sites in Benin City, Nigeria,” Ghana J. Sci., 43; 9-15, 2003.
[8] E.U. Ikhouria, S. O. P. Urunmatsoma, and F. E. Okieimen, “Preliminary investigation of chemical fraction and heavy metal accumulation in plant maize (Zea mays) grown on chromated copper arsenate (CCA) contaminated soil amended with poultry droppings,” Afr. J. Biotech.. 9 :2675- 2682, 2010.
[9] W. Aprill, and R. Sims, “Evaluation of the use of prairie grasses for stimulating polycyclic aromatic hydrocarbon treatment in soil,” Chemosphere. 20, 253–265, 1990.
[10] H. H. Liste, and M. Alexander, “Plant-promoted pyrene degradation in soil,” Chemosphere 40, 7–10, 2000
[11] A. K. Gupta, and S. Sinha, “Assessment of single extraction methods for the prediction of bioavailability of metals to Brassica juncea L Czean (var. Vaibhav) grown on tannery waste contaminated soil,” J. hazard. Mater; 149 (2): 141-150, 2007.
[12] M. C. Vavrek, and W. J. Campbell, “Identification of plant traits that enhance biodegradation of oil,” 9th Annual International Petroleum Environmental Conference, October 2002, Albuquerque, NM.
[13] B. L. Folson, C. R. Lee, and D. J. Bates, “Influence of disposal environment on availability and plant uptake of heavy metals in dredged material,” Tech. Rep. EL. 81-12 U.S. Army, Washington D.C, 1981.
[14] G. J. Bouyoucos, “Hydrometer method improved for making particle size analysis of soil,” Agro. J., 54, 464-465, 1962.
[15] D. W. Nelson and L. E. Sommers, “Total carbon, Organic carbon and Organic matter,” Methods of soil Analysis, Part 2, 2nd edn., pp 539 – 579. ASA, SSSA, Madison, WI, 1982.
[16] S. Uba, A. Uzairu, G. F. S. Harrison, M. L. Balarabe, and O. J. Okunola, “Assessement of heavy metals bioavailability in dumpsites of Zaira Metropolis, Nigeria,” Afr. J. Biotechnol., 7: 122-130, 2008.
[17] A. Tessier, P. G. C. Campbell, and M. Bissom, “Sequential extraction procedure for the speciation of particulate trace metals,” Anal. Chem., 51 (7): 844-851, 1979.
[18] DPR (Department of petroleum resources), Environmental guidelines and standards for the petroleum industry in Nigeria (revised edition). Department of Petroleum Resources, Ministry of Petroleum and Natural Resources, Abuja, Nigeria, 2002.
[19] D. L. Sparks, “Environmental Soil Chemistry,” 3rd edn. Academic Press, 2003.
[20] E. J. Udo, and A. A. Fayemi, “The effect of oil pollution of soil on germination, growth and nutrient uptake of corm,” J. Environ. Qual., 4: 537-540, 1999.