Commenced in January 2007
Paper Count: 32451
Ecological Risk Assessment of Heavy Metals in Contaminated Soil from a Point Source
Authors: S. A. Nta
Abstract:The study assessed the levels of some heavy metals in the contaminated soil from a point source using pollution indices to measure the extent of pollution. The soil used was sandy-loam in texture. The contaminant used was landfill leachate, introduced as a point source through an entry point positioned at the center of top layer of the soil tank. Samples were collected after 50 days and analyzed for heavy metal (Zn, Ni, Cu and Cd) using standard methods. The mean concentration of Ni ranged from 5.55-2.65 mg/kg, Zn 3.67-0.85 mg/kg, Cu 1.60-0.93 mg/kg and Cd 1.60-0.15 mg/kg. The richness of metals was in decreasing order: Ni > Zn > Cu > Cd. The metals concentration was found to be maximum at 0.25 m radial distance from the point of leachate application. The geo-accumulation index (Igeo) studied revealed that all the metals recovered at 0.25 and 0.50 m radial distance and at 0.15, 0.30, 0.45 and 0.60 m depth from the point of application of leachate fall under unpolluted to moderately polluted range. Ecological risk assessment showed high ecological risk index with values higher than RI > 300. The RI shows that the ecological risk in this study was mostly contributed by Cd ranging from 9-96. Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 346
 M. B. McBride, “Environmental Chemistry of Soils”, Oxford University Press, New York, (1994).
 M. Alexander, “Biodegradation and Bioremediation”, San Diego, Academic Press, (1999).
 E. D. Kristin, “Remediation of Materials with Mixed Contaminants-Treatability, Technology and Final Disposal”, Örebro University Publishers, (2009).
 O. N. Mathias, & N. U. Stephen, “Use of Enrichment, Ecological Risk and Contamination Factors with Geo-accumulation Indexes to Evaluate Heavy Metal Contents in the Soils around Ameka Mining Area, South of Abakaliki, Nigeria”, J. Geo. Environ. Earth Sci. Inter. Vol. 5(4), (2016). pp. 1-13.
 L. Hakanson, 1980. “An Ecological Risk Index for Aquatic Pollution Control”, A Sediment Ecological Approach. Wat. Res. Vol. 14(5), (1980). pp. 975-1001.
 R. Miroslav, & N. B. Vladimir, “Practical Environmental Analysis”, Royal Society of Chemistry, Thomas Graham House. Science Park. Milton Road, Cambridge CB4 OWF. UK (1998).
 W. L. Lindsay, & W. A. Norvell, “Development of a DTPA Soil Test for Zinc, Iron, Manganese, and copper”, Soil Science Society of America Journal. 42: 1978. pp 421-428.
 G. Muller, “Index of Geo-accumulation in Sediments of the Rhine River” Geo. J. Vol. 2(3), pp. 108-118.
 M. B. Sulaiman., A. H. Santuraki, & A. U. Babayo, “Ecological Risk Assessment of Some Heavy Metals in Roadside Soils at Traffic Circles in Gombe, Northern Nigeria”, J. Appl. Sci. Environ. Manage. Vol. 22(6), (2018). pp 999–1003.
 DPR, “Environmental guidelines and Standards for the petroleum industries in Nigeria Department of Petroleum Resources, Ministry of Petroleum and Mineral Resources, Abuja, Nigeria”. (2002).
 H. H. Huu, S. Rudy, & A. V. Damme, “Distribution and Contamination Status of Heavy Metals in Estuarine Sediments near Cau Ong harbor, Ha Long Bay, Vietnam. Geo”, Belgi. 13(12) (2010). pp 37-47.
 H. Zhu, X. Z., Yuan, & G. M. Zeng, 2012. “Ecological Risk Assessment of Heavy Metals in Sediments of Xiawan Port Based on Modified Potential Ecological Risk Index” Trans Nonferrous Met Soc China, Vol. 22: (2012). pp 1470–1477. doi:10.1016/S1003- 6326(11)61343-5.
 Fadigas, F. D. S., M. B. Nelson. & A. Sobrinho. “Estimation of Reference Values for Cadmium, Cobalt, Chromium, Copper, Nickel, Lead, and Zinc in Brazilian soils”, Commun Soil Sci Plant Anal. 37: (2014) pp. 945–959. doi:10.1080/00103620 600583885.
 Guo, G., F. Wu. & F. Xie, “Spatial Distribution and Pollution Assessment of Heavy Metals in Urban Soils from Southwest China” J. Environ Sci. 24: (2021). 410–418.
 Islam, A. R. M. T., M. A. Rakib. & M. S. Islam, “Assessment of Health Hazard of Metal Concentration in Groundwater of Bangladesh” Am Chem Sci J. 5: (2015). pp 41–49. doi:10.9734/ ACSj/2015/13175.
 Trujillo-González J. M., M. A. Torres-Mora. & R. Jiménez-Ballesta. “Land-use-Dependent Spatial Variation and Exposure Risk of Heavy Metals in Road-deposited Sediment in Villavicencio, Colombia. Environ Geochem Healt”, 2018;6. doi:10.1007/s10653-018-0160-6.
 Nta, S. A., M. J. Ayotamuno., A. H., Igoni, R. N. Okparanma. “Contaminant Transport in Soil from a Point Source”, World Academy of Science, Engineering and Technology International Journal of Agricultural and Biosystems Engineering. 14(8), (2020). pp 94-101.