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Agricultural activities, discharge of raw sewage into farms and the rise in urbanization have greatly contributed to soil pollution. During the rainy season, surface runoff from farms find their way into water bodies and deposits these contaminants into Rivers and Lakes which poses a threat to both aquatic and terrestrial organisms that depend on that water source. The objective of this research was to determine the level of anions and heavy metals from sediments in River Sio, Busia County, Kenya. Five sediment samples were taken from five sampling points and the levels of anions and heavy metals in them determined. Anions were determined using Shimadzu 1800 UV/visible spectrophotometer while heavy metals were determined using Shimadzu 6200 flame atomic absorption spectrophotometer (AAS). Copper, lead and nickel were above the allowed WHO limits while cadmium was below detection limit. The levels of nitrates, phosphates and chlorides were higher during the wet season due to surface runoff that carried these nutrients from the farms and deposited them on the bottom of the River. The levels of heavy metals were high during the dry season due to evaporation of water from the River, leading to an increase in the analyte concentration during the dry season. High levels of copper and nickel in the sediments points to the use of herbicides and pesticides in farming and washing of vehicles and motorcycles on the banks of the River. According to Igeo nickel showed moderate pollution during the dry season. The contamination factor for lead was very high during the dry season, while pollution load index confirmed pollution due to anthropogenic activities in sampling sites 1 – 4 during the dry season and no pollution due to anthropogenic activities during the wet season. The study recommends reduced use of inorganic fertilizers in order to save the River from the danger of eutrophication. Excessive use of agrochemicals such as herbicides and pesticides should be discouraged. In addition, pesticide leaching and the level of microbes in soil and sediments should be considered for further research
Marschner H. Mineral nutrition of higher plants. Academic press, London, England; 1995.
Singh RP, Mishra SK. Available Macronutrients (N, P, K and S) in the soil of Chiraigaon block of district Varanasi (U.P) in relation to soil characteristic. Indian Journal of Science and Research. 2012;3(1):97-100.
Weier TE, Stocking CR, Barbour MG. An introduction to plant Biology, 5th Edition. University of California: Davis California; 1973.
Gary WV, Stephen JD. Environmental chemistry, a global perspective, second Edition; 2005.
Kabata PA. Trace elements in soils and plants. 3rd Edition. CRC Press: Boca Raton, FL; 2001.
Adriano DC. Trace elements in the terrestrial environment. Springer-Verlag: Berlin; 2001.
Violina R, Radka V, Ivanova J, Todorov M, Krasimir I. Lead, cadmium, zinc, and copper bioavailability in the soil-plant-animal system in a polluted area. Journal of the Scientific World. 2010;10:273–285.
Crusberg TC, Mark S, Dilorio A. Biomineralization of heavy metals. Fungal Biotechnology in Agricultural, Food and Environmental Applications: CRC Press. 2004;674–691.
Liu J, Li Y, Zhang B, Cao J, Cao Z, Domagalski J. Ecological risk of heavy metals in sediments of the Luan River water source. Journal of Ecotoxicology. 2009;18:748–758.
Salati S, Moore F. Assessment of heavy metal concentration in the Khoshk River water and sediment, Shiraz, Southwest Iran. Journal of Environmental Monitoring and Assessment. 2009;164:677–689.
Juozulynas A, Jurgelėnas A, Butkienė B, Greičiūtė K, Savičiūtė R. Implications of soil pollution with heavy metals for public health. Geologija. 2008;75–79.
Smolders E, McGrath S, Fairbrother A, Hale B, Lombi E, McLaughlin M, Rutgers M, Van der Vliet L. Hazard assessment of inorganic metals and metal substances in terrestrial systems. CRC Press. 2007;113. DOI: 10.1201/9781420044416.ch6
Barasa B, Majaliwa JM, Lwasa S, Obando J, Bamutale Y. Magnitude and transition potential of land use cover changes in the trans-boundary river Sio catchment using remote sensing and GIS. Journal of Analysis of GIS. 2011;17(1):73-80.
Akoto O, Adiyiah J. Chemical analysis of drinking water from somecommunities in the Brong Ahafo region. International Journal of Environment Science and Technology. 2007;4(2):211-214.
EPA. Soil sampling quality assurance user’s guide, 2nd Edition; 1989. EPA/600/8-89/046 (Accessed 02/10/2018). Available:http://cluin.org/download/char/soilsamp.pdf
Bodger K. Fundamentals of environmental sampling, Government Institute Rockville, MD; 2003.
Mesoppirr L, Okongo E, Kiptoo J, Magoma G, Oyaro N. Analysis of the levels of phosphates, nitrates and sulphates in the wheat growing area of in Narok County, Kenya. Journal of environment and earth sciences. 2015;5:(4).
Gupta PK. Soil, plant, water and fertilizer analysis. 1999;343.
Taylor RS, Mc Lennan MS. Chemical compositon and element distribution in the Earth’s crust; Stony Brook, state university of New York; 1995.
Cardellicchio N, Buccolieri B , Leo AD, Librando V, Minniti Z, Spad L. Methodological approach for metal pollution evaluation in sediments collected from the Taranto Gulf. Journal of Toxicological and Environmental Chemistry. 2010;91(7):1273-1290.
Dimuthu Nilmini Wijeyaratne WM. Application of pollution indices to quantify the pollution status of shallow sediments of the Bolgoda Lake, Sri Lanka. Journal of Natural Science Foundation. 2016;44:(3): 279-289.
Mohsen N, Alireza P. Application of geoaccumulation index and enrichment factor for assessing metal contamination in the sediments of hara biosphere reserve, Iran. Journal of chemical speciation and Bioavailability. 2014;26(2):99–105.
Suciu I, Cosma M, Todica S, Bolboaca D, Jantschi L. Analysis of soil heavy metal pollution and pattern in central Transylvania. International Journal of Molecular Science. 2008;(9):434.
Ogoyi O, Mwita CJ, Nguu EK, Shiundu PM. Determination of heavy metal content in water, sediment and microalgae from Lake Victoria, East Africa. The Open Environmental Engineering Journal. 2011;4:(1).
Kaur S, Mehra P. Assessment of heavy metals in summer & winter seasons in river yamuna segment flowing through Delhi, India. Journal of Environment and Ecology, 2012;3:(1):149–165.
Provin TL, Pitt JL. Description of water analysis parameters; 2010.
Ondoo KO, Kiptoo JK, Anam AO, Shivaji SM, Omondi BE, Ogilo JK. Determination of selected water quality parameters in River Sio, Busia County, Kenya. International Research Journal of Pure and Applied Chemistry. 2019;18:(3):1–16.