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IJSTR >> Volume 1 - Issue 11, December 2012 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Heavy Metals Accumulation In Cabbage, Lettuce And Carrot Irrigated With Wastewater From Nagodi Mining Site In Ghana

[Full Text]



G. A. Boamponsem, M. Kumi, I. Debrah



Index Terms:- cabbage, carrot, heavy metals, irrigation, lettuce, mining, wastewater



Abstract:- The heavy metal pollution is a major environmental problem especially in mining areas. The study was carried out to quantify heavy metal levels and compare their accumulation in the stems, leaves and roots of Lactuca sativa (lettuce), Brassica oleracea L. var capitata (cabbage) and Daucus carrota var sativa (carrot) irrigated with wastewater from Nagodi mining site. Pot experiment was conducted using surface soil (0-20cm). Differential accumulation and translocation of copper (Cu), lead (Pb), iron (Fe), manganese (Mn) cadmium (Cd) and zinc (Zn) in the root, stem and leaf of vegetables were investigated using atomic absorption spectrophotometer. Cd concentration in the various parts of D. carrota was in the range of 0.070 -0.090 mg/Kg. The highest concentration (17.30 mg/Kg) of Mn was found in the stem of L. sativa. Fe was highly absorbed (139.6 mg/Kg) by B. oleracea roots. The highest concentration (0.221 mg/Kg) of Cu was found in D. carrota roots and the highest concentration (35.35 mg/Kg) of Zn was found in the roots of Brassica. Cd accumulation in L. sativa and B. oleracea was below detection limit (< 0.002 mg/Kg). Pb absorbed by the three genotypes was below detection limit (< 0.005 mg/Kg). Though heavy metals were absorbed, their concentrations were below WHO/FAO recommended limits; vegetables cultivated with such wastewater may be considered safe for consumption.



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