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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 131 - 144 (14page)
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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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참고문헌 (40)
참고문헌 신청
Afangideh, C.B. / 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. / 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. / 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. / 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
Ahiamadjie, H. / 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. / 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. / 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
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