Abstract
This paper integrated geophysical and geochemical methods to study the pollution of soil at the sewage plant at the University of Nigeria, Nsukka. The plant has two large stabilization ponds. Vertical electrical sounding (VES) was carried out to determine the depth of plume, and thus evaluate the safety of the underlying water table aquifer. Tracking of plume direction was by the application of horizontal profiling (HP) and induced polarization (IP). Geochemical analysis of 12 soil samples collected at 1 m and 5 m depths from 6 augured holes around the plant were carried out to evaluate the levels of concentration of the pollutants via their pollution indices (geoaccumulation index (Igeo), enrichment factor (EF), contamination factor (CF), pollution load index (PLI)). Results of the 22 VES shots showed the depth of plume to be about 40 m. Together with VES and aquifer vulnerability mapping techniques a plume migration rate of 0.76 m/yr was evaluated and thus, it would take 144 years to reach the aquifer at average water table depth of 110 m. The HP and IP showed concentrations of plume face towards the northeast of the plant. The total dissolved solids (TDS) and pollution indices were observed to be higher along the direction of migration of the contaminant plume than the other areas. The Igeo and CF show decreasing soil pollution down the profile. The EF showed no variation in enrichment pattern with depth. The pollution load index (PLI) was found to be 1.44 and 1.22 at the depths of 1m and 5m respectively, which indicates that the soil is polluted at both depths, yet less polluted down the profile. However, it may be safe to conclude that the aquifer is safe, considering the travel time and also that the pollution of soil at the site decreases with depth.
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Afangideh, C.B., Nnaji, C.C., Onuora, C., and Okafor, C., 2015, Comparative study of the leachability of heavy metals from sewage sludge, sawdust and organic fraction of municipal solid waste. British Journal of Applied Science and Technology, 10, 1–13.
Ahiamadjie, H., Adukpo, O.K., Tandoh, J.B., Gyampo, O., Nyarku, M., Mumuni, I.I., Agyemang, O., Ackah, M., Otoo, F., and Dampare, S.B., 2011, Determination of the elemental contents in soils around diamond cement factory, Aflao. Research Journal of Environmental and Earth Sciences, 3, 46–50.
Akoto, O., Ephramin, J.H., and Darko, G., 2008, Heavy metals pollution in surface soils in the vicinity of abundant railway serving workshop in Kumassi, Ghana. International Journal of Environmental Research, 2, 359–364.
Banat, K.M., Howari, F.M., and Al-Hamad, A.A., 2005, Heavy metals in urban soils of Central Jordan: should we worry about their environmental risks? Environmental Research, 97, 258–273.
Barbieri, M., 2016, The importance of Enrichment factor and geoaccumulation index to evaluate the soil contamination. Journal of Geology and Geophysics, 5, 237. doi:10.4172/2381-8719.1000237
Buccolieri, A., Buccoleiri, G., Cardellichio, N., Dell’Atti, A., Di Leo, A., and Maci, A., 2006, Heavy metals in marine sediments of Taranto Gulf (Ionian Sea, Southern Italy). Marine Chemistry, 99, 227–235.
Chaney, R.I., 1994, Trace metal movement in soil plant systems and bioavailability of bio-solids. In: Clap, C.E. and Lanson, W.E. (eds.), Sewage Sludge Land Utilization and the Environment. Soil Science Society of American Publication, Wisconsin, p. 27–31.
Duce, R.A., Hoffmann, G.L., and Zoller, W.H., 1975, Atmospheric trace metals in remote Northern and Southern Hemisphere sites: pollution or natural? Science, 187, 59–61.
Ergin, M., Saydam, C., Basturk, O., Erden, E., and Yoruk, R., 1991, Heavy metal concentration in surface sediments from the two coastal inlets (Golden Horn Estuary and Izmit Bay) of the northeastern Sea of Marmara. Chemical Geology, 91, 269–285.
Ezeigbo, H.I. and Ozoko, D.C., 1989, An evaluation of the water resources of Nsukka and environs, Anambra State, Nigeria. Water Resources, 1, 111–115.
Hakanson, L., 1980, An ecological risk index for aquatic pollution control: A sedimentological approach. Water Research, 14, 975–1001.
Hernandez, L., Probst, A., Probst, J.L., and Ulrich, E., 2003, Heavy metal distribution in some French forest soils: evidence from atmospheric contamination. The Science of Total Environment, 312, 195–210.
Kirsch, R., 2006, Groundwater protection: vulnerability of aquifers. In: Kirsch, R. (ed.), Groundwater Geophysics: A Tool for Hydrogeology. Springer, p. 459–472.
Loska, K., Cebula, J., Pelczar, J., Wiechula, D., and Kwapulinski, J., 1997, Use of enrichment and contaminant factors together with geoaccumulation indexes to evaluate the content of Cd, Cu, and Ni in the Rybnik Water Reservoir in Poland. Water, Air, and Soil Pollution, 93, 347–365.
Loska, K., Wiechula. D., Barska, B., Cebula, E., and Chojnecka, A., 2003, Assessment of arsenic enrichment of cultivated soils in Southern Poland. Polish Journal of Environmental Studies, 12, 187–192.
Mbagwu, J.S.C., Agbim, N.N., Oti, N.O., and Udom, B.E., 2004, Longterm effects of disposal of sewage waste on physical properties of an ultisol in Nigeria. International Journal of Agricultural and Biological Sciences, 3, 39–45.
Mediolla, L.L., Domingues, M.C.D., and Sandoval, M.R.G., 2008, Environmental assessment of an active tailings pile in the state of Mexico (Central Mexico). Research Journal of Environmental Sciences, 2, 197–208.
Milson, J., 2003, Field Geophysics (3rd edition). John Wiley & Sons, London, 249 p.
Muller, G., 1969, Index of geoaccumulation in sediments of the Rhine River. Geological Journal, 2, 108–118.
Muller, G., 1979, Heavy metals in the sediment of the Rhine–Changes seity. Umschau in Wissenschaft und Technik, 79, 778–783.
Nwajide, C.S., 2013, Geology of Nigeria’s sedimentary basins (1st edition). CSS Press, Lagos, 565 p.
Ofomah, J.C. and Ezeigbo, H.I., 1997, Hydrogeological evaluation of the Anambra River Basin Basin, southeastern Nigeria. Water Resources, 8, 52–70.
Ofomata, G.E.K., 2002, A survey of the Igbo nation. First Africa Publishers Ltd., Onitsha, 703 p.
Olubunmi, F.E. and Olorunsola, O.E., 2010, Evalutation of the status of heavy metal pollution of sediment of Agbabu bitumen deposit area, Nigeria. European Journal Science Resources, 41, 373–382.
Ong, M.C., Menier, D., Shazili, N.A.M., and Kanmaruzzaman, B.Y., 2013, Geochemical characteristics of heavy metals concentrations in sediments of Quiberon Baywaters, south Brittany France. Oriental Journal of Chemistry 29, 39–45.
Ozoko, D.C., 1997, Hydrogeochemical Modelling of Groundwater Systems in Nsukka, Enugu State, South Eastern Nigeria. Ph.D. Thesis, University of Nigeria Nsukka, Nsukka, 359 p.
Pozdnyakova, L., Pozdnyakov, A., and Zhang, R., 2001, Application of geophysical methods to evaluate hydrology and soil properties in urban area. Urban Water, 3, 205–216.
Praveena, S.M., Radojevic, M., and Abdullah, M.H., 2007, The assessment of mangrove sediment quality in Mengkabong logon: an index analysis approach. International Journal Environmental Science Education, 2, 60–68.
Qingjie, G., Jun, D., Yunchuan, X., Qingfei, W., and Liqiang, Y., 2008, Calculating pollution indices by heavy metals in ecological geochemistry assessment and a case study in parks of Beijing. Journal of China University of Geosciences, 3, 230–241.
Reimann, C. and DeCaritat, P., 2000, Intrinsic flaws of element enrichment factors (EFs) in environmental geochemistry. Environmental Science Technology, 34, 5080–5091.
Reyment, R.A., 1965, Aspects of the Geology of Nigeria: the stratigraphy of the Cretaceous and Cenozoic deposits. Ibadan University Press, Ibadan, 145 p.
Seshan, B.R.R., Natesan, U., and Deepthi, K., 2010, Geochemical and statistical approach for evaluation of heavy metal pollution in core sediments in southeast coast of India. International Journal of Environmental Science and Technology, 7, 291–306.
Taylor, S.R. and McLennan, S.M., 1985, The continental crust: Its composition and evolution. Blackwell Scientific Publication, Carlton, 312 p.
Taylor, S.R. and McLennan, S.M., 1995, The geochemical evolution of the continental crust. Reviews of Geophysics, 33, 241–265.
Thomilson, D.C., Wilson, D.J., Harris, C.R., and Jeffrey, D.W., 1980, Problem in heavy metals in estuaries and the formation of pollution index. Helgol Wiss Marine, 33, 566–575.
Tomllinson D.L., Wilson, J.G., Hariis, C.R., and Jeffery, D.W., 1980, Problems in the assessment of heavy metal levels in estuaries and the formation of a pollution index. Helgoland Scientific Meeresunteruchung, 33, 566–575.
Tree Fruit Research & Extension Centre, 2004, Cation-Exchange Capacity (CEC). Washington State University, 1100 N Western Ave., Wenatchee, WA, 98801, USA.
Udom, B.E., Mbagwu, J.S.C., Adesodun, J.K., and Agbim, N.N., 2003, Distribution of zinc, copper, cadmium and lead in a tropical ultisol after long-term disposal of sewage sludge. Environmental International, 30, 467–470.
Wu, Z., He, M., Lin, C., and Fan, Y., 2011, Distribution and speciation of four heavy metals (Cd, Cr, Mn and Ni) in the surficial sediments from estuary in Daliao River and Yingkou bay. Environmental Earth Sciences, 63, 163–175.
Zoller, W.H., Gladney, E.S., and Due, R.A., 1974, Atmospheric concentrations and sources of trace metals at the south pole. Science, 183, 198–200.
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Onwuka, S.O., Onuoha, M.K. & Omonona, O.V. Assessment of soil contamination at the central sewage treatment plant, University of Nigeria, Nsukka. Geosci J 22, 131–144 (2018). https://doi.org/10.1007/s12303-017-0023-7
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DOI: https://doi.org/10.1007/s12303-017-0023-7