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C. V. Miller, G. D. Foster and B. F. Majedi, “Base Flow and Storm Flow Metal Fluxes from Two Small Agricultural Catchments in the Coastal Plain of Chesapeake Bay Basin, United States,” Applied Geochemistry, Vol. 18, No. 4, 2003, pp. 483-501.

has been cited by the following article:

  • TITLE: Selected Heavy Metals in Water and Sediments and Their Bioconcentrations in Plant ( Polygonum pulchrum) in Sosiani River, Uasin Gishu County, Kenya

    AUTHORS: Judith K. Jepkoech, Gelas M. Simiyu, Musa Arusei

    KEYWORDS: Bioaccumulation; Bioconcentration Factor; Food Chain; Exposure Risks

    JOURNAL NAME: Journal of Environmental Protection, Vol.4 No.8, August 5, 2013

    ABSTRACT: Heavy metals’ availability and accumulation along the food chain pose public health risks. Water, sediment and plant samples were collected from selected sampling sites along Sosiani River, Uasin Gishu County, Kenya. The sediment and plant samples were dried in the oven at 50°C to constant weight and digested in a mixture of acids according to standard procedures. The water samples, sediments and plants digests were analyzed for selected heavy metals using Atomic Absorption Spectrophotometer (model AAS Variant 200). The site near the Moi Teaching and Referral Hospital (MTRH) had the highest total heavy metals concentration in water: Cu (0.18 ± 0.04 ppm); Pb (0.46 ± 0.09 ppm) and Zn (0.70 ± 0.22 ppm) and sediments: Cu (1.62 ± 0.14 ppm); Pb (1.27 ± 0.17 ppm) and Zn (6.73 ± 0.88 ppm) respectively. Fractionation of heavy metals in sediments showed low percentage solubility (Cu 9.3%; Pb 8.5%; Zn 4.2%). Concentration of zinc in studied plants was highest (3.60 ± 0.63 ppm), with a bioconcentration factor of 15.1 based on soluble zinc fraction. This indicates that conditions in the study area show preferential zinc metal uptake in plants and may lead to accumulation in exposed plants posing Zn exposure risks along the food chain. Suggestions are made for monitoring of heavy metals in food crops and aquatic organisms such as fish in the study area.