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Study of Spatial Distribution of Potentially Toxic Elements in a Nature Reserve in Langata Ecosystem
Journal of Health and Environmental Research
Volume 6, Issue 4, December 2020, Pages: 114-118
Received: Jul. 21, 2020; Accepted: Oct. 7, 2020; Published: Nov. 9, 2020
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Samwel Boaz Otieno, Department of Community Health, Great Lakes University, Nairobi Centre, Nairobi, Kenya
Emmanuel Ngumbi, Africa Fund for Endangered Wildlife (AFEW) Kenya, Nairobi, Kenya
Christine Odhiambo-Nyan’gaya, Africa Fund for Endangered Wildlife (AFEW) Kenya, Nairobi, Kenya
Jagi Gakunju, Africa Fund for Endangered Wildlife (AFEW) Kenya, Nairobi, Kenya
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Introduction: Study of Spatial distribution trends of potentially toxic trace (PTE) element pollution in Nature Reserves in Kenya soil has not been fully done. Pollution from potentially toxic trace elements (PTEs) suspected to be widespread in many parts of Kenya including Nature reserves. This is concidered a threat to wild animals and human health. This therefore necessitates a study to understand the extent of spatial distribution of PTE of much economic and health importance. Methods: About forty soil samples were taken in AFEW nature reserve in Langata Ecosystem at, 25 centimeters deep using soil augur. The samples in Ziplocs were transported to the chemistry labs. at Kabete and analyzed to determine levels of Pb Hg, Co Cr Cu, Zn by Coupled Plasma (ICP) Atomic Emission Spectrophotometry (AES) Optima 8000, Perkin Elmer to determine various ions, the results are presented in mg/gm. Health Quotient (HQ), Health Index (HI) and Pollution Index was calculated from the results. Results: In the study, traces of Potential Toxic Elements (Pb, Hg, Cd, Cr, Cu) were found in soil samples taken in varying quantities. Generally, there was higher levels near a stream in the reserve, Pb ranging from 0.9080mg/gm to 3.6927mg/gm; Hg varying from 1.8355mg/gm to 3.4781mg/gm. All others showed variation with higher levels in batches (B2) near the stream. No Zinc and Aluminum was detected in the samples. Health Index due to five PTEs was 0.859. Conclusion: It can be concluded that there are significant level Pb Hg, and Cobalt in various transects, but more near the stream traversing the reserve. HI is < 1 but should other PTEs in sample be included will likely be 1, meaning Health Hazard exists in the reserve to humans and animals. Pollution index was > 1 for Pb, Hg, and Co suggesting pollution by lead and Mercury in the Reserve.
Toxic, Elements, Spatial, Nature, Reserve
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Samwel Boaz Otieno, Emmanuel Ngumbi, Christine Odhiambo-Nyan’gaya, Jagi Gakunju, Study of Spatial Distribution of Potentially Toxic Elements in a Nature Reserve in Langata Ecosystem, Journal of Health and Environmental Research. Vol. 6, No. 4, 2020, pp. 114-118. doi: 10.11648/j.jher.20200604.12
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