Journal of Environment Pollution and Human Health
ISSN (Print): 2334-3397 ISSN (Online): 2334-3494 Website: http://www.sciepub.com/journal/jephh Editor-in-chief: Dibyendu Banerjee
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Journal of Environment Pollution and Human Health. 2019, 7(1), 39-52
DOI: 10.12691/jephh-7-1-6
Open AccessArticle

Land Use and Water Pollution along the Altitudinal Gradient of the Likii River, Laikipia County, Kenya

Mary Waithiegeni Githinji1, Francis Mwaura2, and Joel Wamalwa3

1Kenya Plant Health and Inspectorate Service (KEPHIS), P.O. Box 49592-00100 Nairobi

2Department of Geography & Environmental Studies, University of Nairobi, Box 30197-00100, Nairobi, Kenya

3County Government of Kakamega P.O. Box 36-50100, Kakamega, Kenya

Pub. Date: July 10, 2019

Cite this paper:
Mary Waithiegeni Githinji, Francis Mwaura and Joel Wamalwa. Land Use and Water Pollution along the Altitudinal Gradient of the Likii River, Laikipia County, Kenya. Journal of Environment Pollution and Human Health. 2019; 7(1):39-52. doi: 10.12691/jephh-7-1-6

Abstract

The study aimed at documenting the key land cover and land use types along the Likii River from the upstream to downstream and establishing the presence or absence of heavy metals (arsenic, mercury, lead) and pesticide residue (atrazine, β-endosulfan-isomer, mirex) along the altitudinal gradient. Land cover and land use analysis were undertaken through field missions conducted within the 2km zone on both sides of the river while water quality was based on surface water samples from 32 water sampling points along the altitudinal gradient from 2014 m to 1852 m. Heavy metal detection was done through Inductively Coupled Plasma Mass Spectrometry (ICP-MS) while the pesticide analysis was undertaken through the Solid-Phase Microextraction (SPME) and Gas Chromatography-Mass Spectrometry (GCMS). The land cover and land use analysis established that the river system was characterized by over ten zones along the altitudinal gradient. Arsenic was detected in the river between 1893-1938 m, with the highest concentration of 1.23 µg As/L at 1910 m, near the Likii low-income residential area. The mean lead concentration was 2.72 mgPb/L with the highest mercury concentration at 7.1µgHg/L between 1938 m and 1893 m in the Likii low-income residential area. The presence of atrazine was detected from below 2018 m near the Kariki Flower Farm after which the level increased downstream to a maximum of 76 µg/L at 1864 m. The maximum concentration of β-endosulfan-isomer at 56.7 µg/L was well above the WHO tentative limit of 20 µg/L in most sections of the river below 2015 m. The mean level of Mirex was 49.7 µg/L with two distinguishable peaks near the Kariki Flower Farm and the Likii low-income residential area. The findings indicated that the water in the Likii River was largely unsafe for human consumption below 2018 m because of the presence of heavy metals (below 1910 m for lead and mercury) and pesticide residue (1934 m for atrazine, 1938 m -2018 m for mirex and 2015 m for β-endosulfan-isomer).

Keywords:
Tropical River land use heavy metals pesticides Mount Kenya region Laikipia county

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References:

[1]  Okeyo, B. & A. Wangila (2012). Lead Poisoning in Owino U huru Slums in Mombasa- Kenya. IPRN-ISIP Project Report.
 
[2]  Ngowi, A. V.F. & T. Partanen (2005). The East Africa Pesticide Network: lessons learned. Epidemiology 16(5) pg. 56.
 
[3]  Nicolau, R., Galera-Cunha, A. & Y. Lucas (2006). Transfer of nutrients and labile metals from the continent to the sea by a small Mediterranean river. Chemosphere, 63 (3): 469-47.
 
[4]  Wetangula G.N. (2004). Assessment of geothermal wastewater disposal effects case studies: Nesjavellir (Iceland) and Olkaria (Kenya) fields. MSc Thesis, University of Iceland.
 
[5]  Stellman J.M (1998). Encyclopedia of occupational health and safety, 4th edition, ILO, Geneva.
 
[6]  Mazumder, D.N. G. (2008). Chronic arsenic toxicity & human health. Indian J Med Res 128: 436-447.
 
[7]  World Health Organization (2001). Arsenic and Arsenic Compounds. 2nd ed. Environmental Health Criteria 224. Geneva.
 
[8]  Fatoki O.S., Okoro H.K., Adekola F.A., Ximba B.J, & R.G. Synman (2012). Bioaccumulation of metals in black mussels (Mytilusgallo-provincialis) in Cape Town Harbour, South Africa. Environmentalist 32:48-57.
 
[9]  Behmke, S., Fallon, J., Duerr, A.E., Lehner, A., Buchweitz, J. & T. Katzne (2015). Chronic lead exposure is epidemic in obligate scavenger populations in eastern North America. Environment International 79: 51-55.
 
[10]  International POPs Elimination Network – IPEN (2012). Global Lead Paint Elimination by 2020: A Test of the Effectiveness of the Strategic Approach to International Chemicals Management. Berkeley, CA.
 
[11]  Dadzie, E.S. (2012). Assessment of heavy metal contamination of the Densu River, Weija from leachate. B.Sc thesis Kwame Nkrumah University of Science and Technology.
 
[12]  Driscoll, C. T., Mason, R. P., Chan, H. M., Jacob, D. J., & N. Pirrone (2013). Mercury as a global pollutant: sources, pathways, and effects. Environmental science & technology, 47(10), 4967-4983.
 
[13]  Mutembei, J.K, Salim A M, Onditi, O.A, Waudo W. & A.O Yusuf (2014). Levels of concentration of heavy metals (lead, cadmium, arsenic and mercury) and nutrients in rivers Naka and Irigu (Kenya) Using Atomic Absorption Spectrometry and UV/Visible Spectrophotometry. Journal of Applied Chemistry (IOSRJAC) 7(11): 82-88.
 
[14]  Baby J., Raj J.S., Biby E.T., Sankarganesh, J., Jeevitha, M.V, Ajisha S.U. & S. S. Rajan (2010): Toxic effect of heavy metals on aquatic environment. Int. J. Biol. Chem. Sci. 4(4): 939-952.
 
[15]  Walters, M. &F. Roe (1965): A study of the effect of zinc and tin administered orally to mice over a prolonged period, Fd. Cosmet. Toxicol., 3: 271-276.
 
[16]  Beman, J. M. & P. A. Matson (2005). Agricultural runoff fuels large phytoplankton blooms in vulnerable areas of the ocean. Nature, 434, 211-214.
 
[17]  Boesch, D.F Boyton, N.R & W.M. Kemp (2001). Factors in the decline of coastal ecosystems. Science 293: 1589-1382.
 
[18]  Jenkinson, B.J., Franzmeier, D.P. & W.C. Lynn (2002). Soil hydrology on an end moraine and a dissected till plain in west-central Indiana. Soil Sci. Soc. Am. J. 66:1367-1376.
 
[19]  Lari, S., Khan, N., Gandhi, K., Meshram, T. & P. T. Neeta. (2014). Comparison of pesticide residues in surface water and ground water of agriculture intensive areas. Journal of environmental health science & engineering. 12(11):1186-2052.
 
[20]  GoK (2007). The Kenya national implementation plan for the Stockholm Convention on Persistent Organic Pollutants (POPS), Ministry of Environment and Natural Resources.
 
[21]  Bucibo, M. N. G. (2010). Identification and quantification of selected pesticides in surface water in Southern Gauteng region. Magister Technologiae dissertation, Vaal University of Technology.
 
[22]  Tirado, R., Englande, A.J., Promakasikorn, L. & V. Novotny (2008). Use of agrochemicals in Thailand and its consequences for the environment. Greenpeace Research Laboratories Technical Note GRL-TN-03-Trochim, W.M.K. (2006).
 
[23]  Abusalma, E.E. A. Y. A (2003). Pesticides residues (Endosulfan and dichlorodiphenyltrichloro ethane) in milk of cows grazed in Elgezira scheme. Master of Public and Environmental Health thesis, University of Khartoum.
 
[24]  World Health Organization (2005). The WHO recommended classification of pesticides by hazard and guidelines to classification. Geneva.
 
[25]  IPEN (2009). Endosulfan in West Africa: Adverse Effects, its Banning, and Alternatives. Stockholm, Sweden.
 
[26]  GoK (1999). Environmental Management and Coordination Act (EMCA) No. 8 of 1999, Government Press, Nairobi.
 
[27]  Aeschbacher J, Liniger H, & Weingartner R. (2005). River water shortage in a highland-lowland system: a case study of the impacts of water abstraction in the Mount Kenya Region. Mountain Research and Development 25(2):155-162.
 
[28]  Kenya National Bureau of Statistics (KNBS, 2010). Kenya 2009 Population and Housing Census.
 
[29]  Takasaki Y., Inagaki K., Sabarudin A., Fujii S.-I., Iwahata D., Takatsu A., Chiba K. & T. Umemura (2011). Multielement analysis of micro-volume biological samples by ICP-MS with highly efficient sample introduction system Talanta, 87(1): 24-29.
 
[30]  Amusu, K.K. (2012). Organochlorine pesticides residue levels in cabbage, soil and irrigation water in some farming communities in Accra. Master’s thesis, Kwame Nkrumah University of Science and Technology.
 
[31]  Makokha A.O., Mghweno L.R., Magoha H.S., Nakajugo A., & J.M. Wekesa (2008). Environmental lead pollution and concentration in food around Lake Victoria, Kisumu, Kenya. African Journal of Environmental Science and Technology 2(10): 349-353.
 
[32]  Ali Y.D. (2010): Toxic elements in the food chain: exposure pathways to infants in selected areas of Limpopo Province. M.Sc. thesis, University of South Africa.
 
[33]  Afolabi, O.M., Ajayi, I.R., Fayose, R.S., Olubosede, O., & A.G. Sunday (2011). Arsenic, Nickel and Iron Concentration levels in Water Samples from Hand-Dug Wells from Ugbe Akoko. American Journal of Applied Sciences, 8(2):182-185.
 
[34]  Clemens, R., Kjell, B., Bjorn, F., Zenebeelaku, M., Redda, T. H. & S. Ulrich (2003). Drinking water quality in the Ethiopian section of the East African Rift Valley I-data and health aspect. Science Total Environment, 311(3): 65-80.
 
[35]  Budambula N. L. M. & E. C. Mwachiro (2005). Metal status of Nairobi river waters and their bioaccumulation in Labeocylindricus. Water, Air, and Soil Pollution 169: 275-291.
 
[36]  Njogu P.W. (2011). Assessment of pollution and prediction of environmental risks of organochlorine pesticide residues on aquatic communities in Lake Naivasha, Kenya. PhD thesis, Jomo Kenyatta University of Agriculture and Technology.
 
[37]  Mwangi J.K., Thiong’o G. T. & J. M. Gathenya (2012). Assessment of the water quality status of Sasumua watershed, Kenya.
 
[38]  Nzeve J.K, Njuguna S.G. & E.C. Kitur (2015). Assessment of Heavy Metal Contamination in Surface Water of Masinga Reservoir, Kenya. Journal of Natural Sciences Research 5(2):1-9.
 
[39]  Salisu, D.A. & M.H. Bichi (2010). Industrial Pollution and Implication on Source of Water Supply in Kano, Nigeria. International Journal of Engineering & Technology 10 (1): 101-110.
 
[40]  Okonkwo J.O & M. Mothiba (2005). Physico-chemical characteristics and pollution levels of heavy metals in the rivers in Thohoyandou, South Africa. Journal of Hydrology 308: 122-127.
 
[41]  Mudyazhezha S. & R. Kanhukamwe (2012). Environmental monitoring of the effects of conventional and artisanal gold mining on water quality in Ngwabalozi River, Southern Zimbabwe. International Journal of Engineering and Applied Sciences 4(10): 13-18.
 
[42]  Dabrowski J.M. (2015). Development of pesticide use maps for South Africa. S Afr J Sci. 111(1/2): 1-7.
 
[43]  Dalvie M. A., Cairncross E, Abdullah S. & L. London. (2003). Contamination of rural surface and ground water by endosulfan in farming areas of the Western Cape, South Africa. Environ Health 2(1).
 
[44]  Jondiko J.I.O. (2004). The fate of malathion and dimethoate and the implications in horticultural development in Kenya - Inaugural conference proceedings analysis of pesticides for a better environment, public health and competitive agricultural and aquatic exports, 8th – 11th August 2004 Arusha International Conference Centre, Arusha– Tanzania.
 
[45]  Plakas K. V., A. J. Karabelas, T. Wintgens, T. Melin (2006). A study of selected herbicides retention bynanofiltration membranes—The role of organic fouling, J. of Memb. Sc., 284: 291-300.
 
[46]  Zhang Y., van der Bruggen, B., Chen, G. X., Braeken, L. &C. Vandecasteele (2004). Removal of pesticides bynanofiltration: effect of the water matrix, Sep. Purif. Technol., 38 pp 163-172.
 
[47]  Herrera F. J., Gonzalez-Pradas G, E. & M. Fernandez-Perez (2006). Controlled release of isoproturon, imidacloprid, and cyromazine from alginate-bentoniteactivated carbon formulations, J. Agric. Food Chem. 54:10053-10060.
 
[48]  Acero J. L., Javier Benitez, F., Francisco J. R. & G. Carolina (2009). Removal of phenyl-urea herbicides in natural waters by UF membranes: Permeate flux, analysis of resistances and rejection coefficients. Separation and Purification Technology 65:322-330.