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Levels of heavy metals in wastewater and soil samples from open drainage channels in Nairobi, Kenya: community health
Geoffrey K Kinuthia1, Veronica Ngure2, Dunstone Beti3
1Daystar University, Department of Science, Engineering & Health, PO Box 44400-00100 GPO, Nairobi, Kenya. gkinuthia@daystar.ac.ke.
Abstract:
Levels of Mercury (Hg), Lead (Pb), Cadmium (Cd), Chromium (Cr), Nickel (Ni) & Thallium (Tl) were established in wastewater & soil samples obtained from 8 sites in open drainage channels at Nairobi industrial area, Kenya. Ultra-trace inductively coupled plasma mass spectroscopy (ICP-MS) was used for metal analysis. Temperature, pH & turbidity of wastewater ranged from 16.75 to 26.05 °C; 7.28 to 8.78; 160.33 to 544.69 ppm respectively and within World Health Organization (WHO) allowable limits. Wastewater conductivities in 4 sites ranged from 770 to 1074 µS/cm and above WHO limits at 25 °C. The mean concentrations of the metals in wastewater ranged from 0.0001 to 0.015 ppm in an ascending order of Tl
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