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- W2946918306 abstract "There is growing public concern over the illegal cultivation of vegetables on soils amended with sewage sludge or irrigated with mixtures of sewage and sewage sludge. Effluents and wastewater from Bidii in Kitale treatment plant are used by vegetable farmers for the irrigation of their vegetables during dry season. These effluents may contain some toxic pollutants which bioaccumulate along the food chain. Moreover the uptake of such toxic metals by vegetables is governed by their availability and concentration in the soil. Therefore such vegetables may accumulate pollutants in excessive amount in their various parts. This may ultimately, adversely affect humans and other species that depend on such crops for food, hence the need to evaluate the variation of pollutant levels in vegetables samples in these areas. Samples of spinach and kales and top soils (0-20) cm were collected from the vegetable farms of Bidii and Taito area as control point. Random sample collections were made five (5) times during the period from the two plots between October to December 2012. The vegetables samples were dried in an oven at 80°C for 72 h. The dry samples were crushed in a mortar and pestle and the resulting powder digested by weighing 1.0 g of oven-dried ground and sieved ( Pb>Cr>Cu in soils while Pb>Zn>Cr>Cu in vegetables. The concentration of NO3- ranged between 2.176 mg/kg to 3.202 mg/kg while PO43- 2.897 mg/kg to 3.342 mg/kg in vegetables. Levels of NO3- in soils were 1.88 mg/kg to 2.06 mg/kg while PO 43- had 4.66 mg/kg to 4.99 mg/kg. The vegetables from Bidii area contained much higher concentrations than those from Taito area. The levels of Cr and Pb in vegetables exceeded WHO Maximum Limit (0.05 mg/kg for Cr and 0.3 mg/kg for Pb). The variation in the parameters determined were found to be statistically significant (p<0.05) as determined by one way ANOVA." @default.
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- W2946918306 date "2015-01-01" @default.
- W2946918306 modified "2023-09-27" @default.
- W2946918306 title "Variation of Pollutant Levels in Vegetables: A Case Study of Kitale Municipality, Trans-Nzoia County, Kenya" @default.
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