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|Title: ||Geochemical Assessment of Trace Metals in Peri-Urban Drainage and Bioaccumulation in Selected Food Crops in the Kumasi Metropolis, Ghana|
|Authors: ||Foli, Gordon|
Gawu, Simon K. Y.
Brako, Blestmond A.
Nude, Prosper M.
|Issue Date: ||4-Jan-2019|
|Publisher: ||Canadian Center of Science and Education|
|Citation: ||Canadian Center of Science and Education, Vol. 9, No. 1; 2019|
|Abstract: ||This paper evaluates some geochemical properties of trace metals in peri-urban drainage and bioaccumulation in
cassava, plantain, lettuce and sugarcane in the Kumasi metropolis in Ghana, West Africa. The aim is to establish
water quality and food safety. Water, sediment and the food crops were sampled along the profiles of Wiwi and
Subin rivers for analysis. T-test statistic shows that pH, HCO3, Cl, Cu, As, Pb and Ni are significant in water and
sediment. Mean concentrations of Cu, As, Pb and Ni in water and sediment are (0.01mg/l; 3.2mg/kg), (3.08mg/l;
4.9mg/kg), (0.034mg/l; 8.7mg/kg) and (0.021mg/l; 6.1mg/kg), respectively. In water, As, Pb and Ni concentrations
are above primary maximum contamination limits of 0.05 mg/l, 0.015 mg/l and 0.020mg/l with metal ratios of
61.54, 2.27 and 1.05, respectively. In sediment, As concentration is above the continental crustal background value
of 1.8mg/kg with a metal ratio of 2.72. From geochemical process models: (1) As and Ni adsorbs into sediment
and may lead to attenuation in water in closed systems; (2) Cu and Pd are in equilibrium and may affect water
quality at higher concentrations. The food crops have trace metals concentrations below reference values and
bioaccumulation factors<1. The food crops are therefore excluders, and safe for dietary intake. Members in
cassava-plantain-lettuce and cassava-lettuce-sugarcane suites have translocation factors (TFs)>1 for Cu and As,
respectively, while lettuce has TF>1 for Pd and Ni. Crops with TF>1 may bioaccumulate the respective trace
metals in over a prolonged period.|
|Description: ||An article published by Canadian Center of Science and Education, and also available at doi:10.5539/enrr.v9n1p25|
|Appears in Collections:||College of Engineering|
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