Statistical Evaluation of the Heavy Metals in the Sediments of Warri River and Environs


  • E.G. Imeokparia Department of Geology, University of Benin, Benin City, Nigeria
  • P. N. Jire Department of Geology, University of Benin, Benin City, Nigeria



Artificial Intelligence, Pattern Classification, Machine Learning, Image Processing, Computer Vision, Video Processing


This study was carried out to assess and characterize the pollution/contamination status of the sediments in Warri River and its environs in view of the increasing level of oil spillages induced by willful acts of vandalization, lack of maintenance of pipelines, aging facilities, accident, illegal bunkering, petroleum refinery and production, urbanization, industrial activities and indiscriminate dumping of wastes.

A total of thirty-two sediments samples were collected from eight sampling stations, grouped into locations B1-B8 respectively and analyzed for heavy metals. The chemical data set generated were subjected to principal component analysis (PCA)/factor analysis (FA) and Hierarchical cluster analysis (HCA) to determine the subtle factors responsible for their distribution. The heavy metal concentrations of locations B1-B8 were further evaluated using enrichment factor (EF), Contamination factor (CF) and Pollution load index (PLI) to assess the level of pollution in the area.

The Factor Analysis results revealed four sources of pollutants which are explained by four factors (1)petroleum production, oil spills and illegal bunkering/pipe line vandalization (2) iron/steel industries (3)vehicular emission(4) indiscriminate dumping of waste. The R and Q mode cluster analysis yielded three clusters respectively.  The Contamination Factor (CF)showed that the sediments have considerable level of Cr contamination at locations B2, B3,B4 and B6 while Fe, Zn, Ni, V, Pb, Cd, Mn and Cu exhibited moderate contamination at locations B1-B7.The Pollution Load Index (PLI)revealed that locations B1-B6  shown progressive site deterioration with respect to the nine measured heavy metals. The Enrichment Factor (EF) indicated that Cr was moderately enriched at locations B1, B2, B4 and B6 while Zn, Ni, Cu, Cd, Mn, Fe, V, and Pb in the sediments ranged from background concentration to minimal enrichment.

Since these heavy metals can become a threat to vegetation and animals and ultimately to humans through the food chain, it is important to continuously monitor the level of pollutants in the environment.  


(1) Abimbola, A. F., Oke,S. A. and Olatunji,A. S.,2002. Environmental Impact assessment of waste dump sites on geochemical quality of water and soils in Warri metropolis, southern Nigeria. Water Resources, vol.13, pp.7-11.

(2) Akpoborie, I. A., Ekakite, O. A. and Adaikpoh, E. O., 2000 .The Quality of Groundwater from Dug Wells in Parts of the Western Niger Delta. Knowledge Review, vol. 2(5), pp. 72-75.

(3) Akpokodje, E.G, Etu-Efeotor, J.O., 1987 .The Occurrence and Economic Potential of Clean Sand Deposits of the Niger Delta. J. Afr. Earth Sci., vol. 6 (1), pp. 61-65.

(4) Al-Oud, S.S., Nadeem, M.E.A., and Al-Stibel, B.H., 2011, Distribution of Heavy Metals in Soils and Plants Around a Cement Factory in Riyhadh City, Central of Saudi Arabia. American – Eurasian J. Agric. & Environ. Sci., 11 (2): pp. 183 – 191.

(5) Amajor, L.C., 1991. Aquifers in the Benin Formation (Miocene Recent), Eastern Niger Delta, Nigeria: Lithostratigraphy, Hydraulics, and Water Quality. Environ Geol Water Sci., vol. 17(2), pp. 85-101

(6) Ata Shakeni; Farid Moore and SoroushModabberi, 2009. Heavy metal contamination and distribution in the Shiraz Industrial complex zone soil, south Shiraz, Ivan, World Applied Science Journal 6 (3) : 413-425

(7) Atakpo, E. A. and AkpoborieI.A. 2011. Investigation of sand deposit in parts of Okpe LGA, Delta State, Nigeria. Accepted for Publication: Nig. Jnl. Of Science and Environment.

(8) Bam T. K. S., 2007. N soil exploration and foundations in the recent coastal areas of Nigeria, Bulletin of Engineering Geology and the Environment, vol. 53, 13-9.

(9) Benka-Coker, O.M., 1983. Studies of Bacteriological and Physico-chemical parameters of Warri River. M.Sc Thesis, University of Benin.

(10) Blaser, P., Zimmermann, S. Luster, J. Shotyk, W., 2000. Critical Examination of Trace Element Enrichments and Depletions in Soil: As, Cr, Cu, Ni, Pb and Zn in Swiss Forest Soils. Sc. Total Environ 249 : 257 – 280.

(11) Chakravarty, M., and Patgiri, A.D., 2009. Metal Pollution Assessment in Sediments of the Dikrong River, N.E. India. J., Hum. Ecol, 27(1); 63 – 67.

(12) Egborge, A.B.M., 1991. Industrialization and Heavy Metals Pollution in Warri River 32nd Inaugural Lecture, University of Benin, Benin City 1-26

(13) Egborge, A.B.M., 2001. Water quality index application and industrialization and heavy metal pollution in the warri river, Nigeria.Environ. Pollut.12: 27 – 40.

(14) Ejechi, B.O., Olobaniyi, S.B., Ogban, F.E., Ugbe, F.C., 2007. Physical and sanitary quality of hand dug well water from oil producing area of Nigeria, Environmental Monitoring and Assessment 128, 495- 501.

(15) Fagbote E.O. and Olanipekun E.O., 2010. Evaluation of the Status of Heavy Metal Pollution of Sediment of Agbabu Bitumen Deposit area, Nigeria. European Journal of Scientific Research. Vol. 41, Nos. 3, pp. 373 – 382.

(16) Fagbote, E.O. and Olanipekun, E.O., 2010. Evaluation of the status of heavy metal pollution of soil and plant (chromolaenaodorata) of Agbadu Bitumen Deport Area, Nigeria. American-Eurasian J. Sci. Res., 5(4): 241- 248.

(17) Hakanson, I., 1980. Ecological Risk Index for Aquatic Pollution Control, a Sedimentological Approach. Water Res., 14:975-1001.

(18) Harikumar, P.S., and Jisha, T.S., 2010. Distribution Pattern of Trace Metal Pollutants in the Sediments of an Urban Wetland in the Southwest Coast of India. International Journal of Engineering science and Technology, Vol. 2(5), pp. 840 – 850.

(19) Idress, F.A. (2009). Assessment of trace metal distribution and contamination in surface soils of Amman, Jordan. Jour. Chem. 4(1) p77 – 87.

(20) Imeokparia, E.G.; Onyeobi, T.U.S and Abodunde, F.L., 2009. Heavy metal concentration in soil from a mechanic village in Uvwie Local Government area of Delta State. Nig. Jour, Applied Science Vol. 27 p.144-150.

(21) Laluraj, C.M., Gopinath, G., Dineshkumar, P.K., 2005: Ground water Chemistry of Shallow acquifers in the Coastal zones of Cochin, India. Applied Ecology and Environmental Research 3(1), pp. 133-139.

(22) Linnik, P.M and Zubenko, I.B. (2000). Role of Bottom Sediments in the Secondary Pollution of Aquatic Environment by heavy metals, Lakes and Reservoirs. Resource Management 5(1) pp 11 – 21.

(23) Lokhande, P.B., Patit, V.V., and Mujawar, H.A., 2008. Multivariate Statistical Analysis of Groundwater in the Vicinity of Mahad Industrial area of Konkan region, India. International Journal of Applied Environmental Sciences.

(24) Loska, K., Wiechula, D. Barska B., Cesule, E., Chojnecka A. (2003). Assessment of arsenic enrichment of cultivated soils in Southern Poland. Pol. J.Enviro. Stud. 12(2) p 187 – 192.

(25) Ministry of Commerce and Industry, (2001). Industrial Mineral Raw Material Resources Survey in Delta State. MC&I, Asaba. 150p.

(26) Mohiuddin, K.M; Zakir, H.M, Otomo, K., Sharmin S. and Shikazono, N., (2010) Geochemical Distribution of Trace metals pollutants in water and sediments of downstream of an urban river. Int. J. Environ. Sci. Tech. 7(1) p 17-28.

(27) Navarro, M.C., Pere-Sirvent, C., Martinez – Sanchez., Vidal, J., Tovar, P.J. and Bech, J., 2008. Abandoned mine sites as a source of contamination by heavy metals: A Case study in a semi-arid zone. Journal of Geochemical Exploration 96pp 183 – 193.

(28) Ndiokwere, C.L., 1984. An investigation of the heavy metal content of sediments and algae from the River Niger and Nigerian Atlantic Coastal waters. Environ. Pollution 7 (B) 247-254.

(29) NEDECO, 1954. (Netherlands Engineering Consultant),The waters of western Nigeria Delta, The Haque

(30) Nigerian Meteorological Agency, 2003. Warri Meteorological Bulletin. In: National Meteorological Report.

(31) Nigerian Navy, 1982. Tide Table Containing tidal predictions for Lagos, Escravos bar, Forecados bar, Bonny town and Calabar, 36pp

(32) Olabaniyi, S.B., Ogban, F.E. Ejechi, B.O., Ugbe, F.C., 2007a. Quality of Groundwater in Delta State, Nigeria. Journal of Environmental Hydrology. 15.

(33) Praveena, S., M., Ahmed, A., Radojevic, M., Abdullah, M.H. and Aris, A.Z., 2007. Factor –Cluster Analysis and Enrichment Study of Mangrove Sediments - An Example from Mengkabong, Sabah. The Malaysian Journal of Analytical Sciences. Vol. 11, no. 2, pp. 421 – 430.

(34) Ramirez-Munoz,J.,1968.Atomic Absorption Spectroscopy and Analysis by Atomic Absorption flame Photometry. Elsvier Publishing Co., NY.

(35) Reghunath R.T.R., Sreedhara M.,Reghavan B.R., 2002. The Utility of Multivariate Statistical Techniques in Hydrogeochemical Studies; example from Karnataka, India. Water Research 36, pp. 2437 – 2442.

(36) Riccardi, C., di Filippo, P.Pomata,D.,Incoronato,F., di Basilio,M. Papini, M.P. and Spicaglia, S., 2008. Characterization and distribution of petroleum hydrocarbons and heavy metals in groundwater from three Italian tank farms. Sci. Total Environ., 393: 50-63.

(37) Ross S.M., 1994. Toxic metals in soil–plant systems. Wiley, Chichester, p 469.

(38) Salomons, W., and Forstner U. (1980). Trace metal analysis of polluted sediments part II evaluation of environmental impact. Environ. Techn. Letters 1, p. 506-517.

(39) Seaward, M.R.D. and Richardson, D.H.S., 1990. Atmospheric sources of metal pollution and effects on vegetation. Pp.75-92,

(40) Sekabira, K., Oryem, H.O, Basambo, T.A.,Mutumba, G., Kakudidi,E.,2010. Assessment of heavy metals pollution in urban streams and its tributaries. International Journal of Environment, Science and Technology 7(3),435-446.

(41) Seshan, B.R; Natesan, U.; Deepth, K., (2010). Geochemical and Statistical approach for evaluation of heavy metal pollution in Core Sediments in Southeast cost of India. Int. J. Environ Sci. Tech. 7(2) p. 291 – 306.

(42) Simex, S.A, Heiz, G.R, (1981). Regional geochemistry of trace elements in Chesapeatre Bay. Environ. Geology 3. P 315-323.

(43) Sutherland, R.A., 2000: Bed sediment-associated trace metals in an urban stream, Oahu, Hawaii, Environmental Geology 39:611-37.

(44) Tomilson, D.C. Wilson, C.J., Harris, C.R., Jeffrey, D.W., 1980. Problem in Assessment of Heavy Metals in Estuaries and the Formation of Pollution Index. Helgol. Wiss. Meeresunlter, 33(1-4), 566 – 575 (10 pages).

(45) United Nations Environmental Protection/Global Program of Action (UNEP/GPA),2004. Why the Marine Environment needs Protection from Heavy Metals. UNEP/GPA Coordination Office.

(46) Vermette S.J. and Binghan V.G., 1986. Trace elements in Frobisher Bay rainwater. Arctic 39 (2): 177-179

(47) Vermette S.J. and Binghan V.G., 1986. Trace elements in Frobisher Bay rainwater. Arctic 39 (2): 177-179.

(48) Wanga, M.S; Kanasiime F., Denny P., Scullion J. (2003). Heavy metals in Lake George Uganda with relation to metal concentration in tissues of common fish specie Hydrobiologia 499(1-3) pp. 83- 93.

(49) Wigwe, G.A., 1975. The Niger Delta Physical. In Ofomata, G.E.K.,(Eu.), Nigeria in Maps: Eastern States (pp 38 – 40). Benin: Ethiope Publ. House.

(50) Yang, Li; Linyu, Xu, Shun, Li 2009. Water quality analysis of the Songhua River Basin using multivariate techniques. Journal of Water Resources and Protection (JWARP)

(51) Yisa, J., Jacob, J.O. and Onoyima, C.C., 2011.Identification of sources of heavy metals pollution in road deposited sediments using multivariate statistical analysis. J. Emerg. Trends gbEng. Appl. Sci., 2: 658-663.




How to Cite

Imeokparia, E., & Jire, P. N. (2018). Statistical Evaluation of the Heavy Metals in the Sediments of Warri River and Environs. European Journal of Applied Sciences, 6(3), 01.