Paper Title
Determination Of Some Heavy Metal Levels In Water And Sediments From River Riana In Kisii County, Kenya.
Article Identifiers
: Keywords
Heavy metals, recommended limits, physico-chemical parameters, sediment quality guidelines (SQGs), WHO and KEBS.
Abstract
In this paper, we determined the heavy metal concentrations in water and sediments in surface water and sediments from the River Riana in Kisii County, Kenya for the period of January to June 2021.Water and sediment samples were collected and the concentrations of Pb, Cr, Ni, Mn. Cu and Zn analyzed. The analysis of heavy metal was carried out using the inductively coupled- plasma atomic emission spectrometer (Shimadzu ICPE-9000) after nitric acid digestion of both water and sediments. The data obtained was analyzed using Statistical Package for Social Scientists (SPSS version 26) and Microsoft Excel spreadsheets and significant differences were accepted at p ≤ 0.05. A compliance study conducted for the water samples to determine the level of water pollution using the Kenya Bureau of Standards (KEBS) and the World Health Organization (WHO) recommended limits for natural drinking water. Similarly, the WHO sediment quality guidelines (SQGs) for fresh water sediments was used to determine the quality of the sediment samples from the river to determine the possible toxic impacts on the aquatic ecosystem. The mean ranges for the selected water physico-chemical parameters were determined for: pH (6.35-8.85), temperature (19.46-22.860C); electrical conductivity (85-294µS/cm), dissolved oxygen (4.30-7.32mg/l), total dissolved solids (86-426mg/l) and turbidity (109-251NTU). The mean concentrations of heavy metals (ppm) in surface water for Pb (0.031-0.196), Cr (<0.001-0.009)), Ni (0.014-0.321), Mn (0.131-0.351). Cu (0.114-0.370) and Zn (0.132-0.326). The heavy metal sediment mean concentrations (ppm) for Pb (0.041-8.74), Cr (0.001-1.31), Mn (276-692), Cu (1.35-9.74) and Zn (6.37-15.67). The investigation revealed that water physico-chemical parameters complied with the WHO and KEBS drinking water quality guidelines by both except for turbidity. The heavy metals Cr, Cu and Zn were within the WHO and KEBS drinking water quality standards while the Pb and Mn concentrations in water exceeded the recommended limits. The Ni concentrations exceeded the KEBS drinking water recommend limit. All the heavy metals complied with WHO SQGs. The River Riana was contaminated by the investigated heavy metals with the potential of heavy accumulation in sediments and metal toxicity the river. To mitigate against negative impacts regular assessment of the water and sediments was proposed.
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How To Cite (APA)
Momanyi Thomas Mongare & Dr. Amos Otieno Wanjara (August-2023). Determination Of Some Heavy Metal Levels In Water And Sediments From River Riana In Kisii County, Kenya.. INTERNATIONAL JOURNAL OF NOVEL RESEARCH AND DEVELOPMENT, 8(8), b27-b50. https://ijnrd.org/papers/IJNRD2308106.pdf
Issue
Volume 8 Issue 8, August-2023
Pages : b27-b50
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Paper Reg. ID: IJNRD_202962
Published Paper Id: IJNRD2308106
Downloads: 000122254
Research Area: Science & Technology
Author Type: Foreign Author
Country: Nairobi, Nyamira Kisii, Kenya
Published Paper PDF: https://ijnrd.org/papers/IJNRD2308106.pdf
Published Paper URL: https://ijnrd.org/viewpaperforall?paper=IJNRD2308106
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