Analytical and geophysical assessments of heavy metals dispersion from an automobile mechanic village and its pollution prevention

Michael A. Nwachukwu, Huan Feng, Jude Alinnor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper assesses metal dispersion from Nekede mechanic village (MV) in the lower Imo River basin Nigeria, to introduce the concept of environmentally friendly MV. Analysis of composite soil samples derived from three replicates collected at each measurement point using atomic absorption spectrophotometer was carried out. Mean values (mg kg-1) above the background, 0-200m from the MV are Pb, 853±572; Mn, 604±531; Cu, 137.3±202; Fe, 17713±4770; Cd, 3.4±12.8; Zn, 444±190, and Ni, 29.4±35.2 measured in the direction of drainage. The dispersion rates (mgkg-1/m) are Fe, 197; Pb, 12.9; Mn, 6.7; Zn, 4.9; Cu, 1.5; Ni, 0.3; and Cd, 0.04. Concentration and dispersion rates were confirmed by metal depth ratio (MDR), and metal distance ratio (MDsR). Electrical resistivity profiling showed metal dispersion to 350 m from the MV, representing a safe distance for farming in the direction of drainage. Both uphole refraction seismic and vertical electric sounding (VES) showed a weathered base (WB) average 18m, consisting of sand and gravel bed (GB). Water table (WT) at 16-21m fluctuates below and above the WB, showing that shallow wells located in areas where WT is above WB, and overlain by GB may easily be polluted by heavy metals. As a result, safe depth of shallow wells is: WT+48m were WB is above WT, and WT+66m were WB is below WT. Relatively higher elevation and slope (1:20) of the MV indicates greater metal dispersion dynamics. Pollution prevention model designs of infiltration basin and shallow water well are presented.

Original languageEnglish
Title of host publication23rd Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010, SAGEEP 2010
Pages815-829
Number of pages15
StatePublished - 1 Dec 2010
Event23rd Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010, SAGEEP 2010 - Keystone, CO, United States
Duration: 11 Apr 201015 Apr 2010

Publication series

NameProceedings of the Symposium on the Application of Geophyics to Engineering and Environmental Problems, SAGEEP
Volume2
ISSN (Print)1554-8015

Other

Other23rd Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010, SAGEEP 2010
CountryUnited States
CityKeystone, CO
Period11/04/1015/04/10

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water tables
automobiles
heavy metals
pollution
Heavy metals
Automobiles
mechanics
water table
automobile
Mechanics
Pollution
village
heavy metal
metal
Water
Metals
gravels
metals
Gravel
drainage

Cite this

Nwachukwu, M. A., Feng, H., & Alinnor, J. (2010). Analytical and geophysical assessments of heavy metals dispersion from an automobile mechanic village and its pollution prevention. In 23rd Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010, SAGEEP 2010 (pp. 815-829). (Proceedings of the Symposium on the Application of Geophyics to Engineering and Environmental Problems, SAGEEP; Vol. 2).
Nwachukwu, Michael A. ; Feng, Huan ; Alinnor, Jude. / Analytical and geophysical assessments of heavy metals dispersion from an automobile mechanic village and its pollution prevention. 23rd Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010, SAGEEP 2010. 2010. pp. 815-829 (Proceedings of the Symposium on the Application of Geophyics to Engineering and Environmental Problems, SAGEEP).
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abstract = "This paper assesses metal dispersion from Nekede mechanic village (MV) in the lower Imo River basin Nigeria, to introduce the concept of environmentally friendly MV. Analysis of composite soil samples derived from three replicates collected at each measurement point using atomic absorption spectrophotometer was carried out. Mean values (mg kg-1) above the background, 0-200m from the MV are Pb, 853±572; Mn, 604±531; Cu, 137.3±202; Fe, 17713±4770; Cd, 3.4±12.8; Zn, 444±190, and Ni, 29.4±35.2 measured in the direction of drainage. The dispersion rates (mgkg-1/m) are Fe, 197; Pb, 12.9; Mn, 6.7; Zn, 4.9; Cu, 1.5; Ni, 0.3; and Cd, 0.04. Concentration and dispersion rates were confirmed by metal depth ratio (MDR), and metal distance ratio (MDsR). Electrical resistivity profiling showed metal dispersion to 350 m from the MV, representing a safe distance for farming in the direction of drainage. Both uphole refraction seismic and vertical electric sounding (VES) showed a weathered base (WB) average 18m, consisting of sand and gravel bed (GB). Water table (WT) at 16-21m fluctuates below and above the WB, showing that shallow wells located in areas where WT is above WB, and overlain by GB may easily be polluted by heavy metals. As a result, safe depth of shallow wells is: WT+48m were WB is above WT, and WT+66m were WB is below WT. Relatively higher elevation and slope (1:20) of the MV indicates greater metal dispersion dynamics. Pollution prevention model designs of infiltration basin and shallow water well are presented.",
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Nwachukwu, MA, Feng, H & Alinnor, J 2010, Analytical and geophysical assessments of heavy metals dispersion from an automobile mechanic village and its pollution prevention. in 23rd Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010, SAGEEP 2010. Proceedings of the Symposium on the Application of Geophyics to Engineering and Environmental Problems, SAGEEP, vol. 2, pp. 815-829, 23rd Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010, SAGEEP 2010, Keystone, CO, United States, 11/04/10.

Analytical and geophysical assessments of heavy metals dispersion from an automobile mechanic village and its pollution prevention. / Nwachukwu, Michael A.; Feng, Huan; Alinnor, Jude.

23rd Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010, SAGEEP 2010. 2010. p. 815-829 (Proceedings of the Symposium on the Application of Geophyics to Engineering and Environmental Problems, SAGEEP; Vol. 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - This paper assesses metal dispersion from Nekede mechanic village (MV) in the lower Imo River basin Nigeria, to introduce the concept of environmentally friendly MV. Analysis of composite soil samples derived from three replicates collected at each measurement point using atomic absorption spectrophotometer was carried out. Mean values (mg kg-1) above the background, 0-200m from the MV are Pb, 853±572; Mn, 604±531; Cu, 137.3±202; Fe, 17713±4770; Cd, 3.4±12.8; Zn, 444±190, and Ni, 29.4±35.2 measured in the direction of drainage. The dispersion rates (mgkg-1/m) are Fe, 197; Pb, 12.9; Mn, 6.7; Zn, 4.9; Cu, 1.5; Ni, 0.3; and Cd, 0.04. Concentration and dispersion rates were confirmed by metal depth ratio (MDR), and metal distance ratio (MDsR). Electrical resistivity profiling showed metal dispersion to 350 m from the MV, representing a safe distance for farming in the direction of drainage. Both uphole refraction seismic and vertical electric sounding (VES) showed a weathered base (WB) average 18m, consisting of sand and gravel bed (GB). Water table (WT) at 16-21m fluctuates below and above the WB, showing that shallow wells located in areas where WT is above WB, and overlain by GB may easily be polluted by heavy metals. As a result, safe depth of shallow wells is: WT+48m were WB is above WT, and WT+66m were WB is below WT. Relatively higher elevation and slope (1:20) of the MV indicates greater metal dispersion dynamics. Pollution prevention model designs of infiltration basin and shallow water well are presented.

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Nwachukwu MA, Feng H, Alinnor J. Analytical and geophysical assessments of heavy metals dispersion from an automobile mechanic village and its pollution prevention. In 23rd Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010, SAGEEP 2010. 2010. p. 815-829. (Proceedings of the Symposium on the Application of Geophyics to Engineering and Environmental Problems, SAGEEP).