Gelas Simiyu

Gelas Simiyu
University of Eldoret · Environmental Biology and Health

About

26
Publications
17,004
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301
Citations
Citations since 2017
14 Research Items
283 Citations
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2017201820192020202120222023020406080
2017201820192020202120222023020406080

Publications

Publications (26)
Article
Full-text available
Purpose: The use of biomass fuels poses great threats to environmental degradation and public health risk accounting for 32% of the total attributable burden of diseases due to indoor air pollution (IAP) in especially Africa. Heavy reliance on biomass fuels for household energy in Kenya makes the country more vulnerable with 90% of the rural popula...
Article
Full-text available
Purpose: This study investigated the impact of increased levels of indoor air pollution (IAP) caused due to biomass burning using different technologies in the rural households of Western, Kenya. A comparative assessment of the impact of traditional cookstoves (TCS) and improved cookstoves (ICS) coupled with the characteristics of kitchen was condu...
Article
Full-text available
Microbes play a critical role in plant litter decomposition and influence the fate of carbon in rivers and riparian zones. When decomposing low‐nutrient plant litter, microbes acquire nitrogen (N) and phosphorus (P) from the environment (i.e., nutrient immobilization), and this process is potentially sensitive to nutrient loading and changing clima...
Article
Full-text available
Improper disposal of human waste is one of the most serious health problems in developing countries due to pollution of the environment. The use of chemical fertilizers for agriculture increase the plant growth to meet the food security of the world, but also causes environmental problems including lowering of soil pH. On the other hand, anaerobic...
Article
Full-text available
River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to...
Article
Full-text available
River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to...
Article
Full-text available
River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to...
Article
Full-text available
River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to...
Article
Full-text available
The use of biomass fuels poses great threats to public health accounting for 32% of the total attributable burden of diseases due to Indoor Air Pollution (IAP) in Africa. Heavy reliance on biomass fuels for household energy in Kenya makes the country more vulnerable with 90% of the rural population relying on biomass fuels for domestic purposes. Th...
Article
Maize crop provides source of livelihood to all groups of people that depend on it. Its adaptability to different agro-ecological zones has led to its increased production and consumption worldwide. Significant proportion of post-harvest losses of maize grain is attributed to storage insect pests including Sitophilus zeamais (maize weevil) which th...
Article
Full-text available
Background. Child exposure to lead from informal used lead-acid battery (ULAB) recycling operations is a serious environmental health problem, particularly in developing countries. Objectives. We investigated child exposure to lead in the vicinities of ULAB recycling operations in the Dandora, Kariobangi and Mukuru slums in Nairobi between January...
Article
Full-text available
The Anaerobic Digestion Pasteurization Latrine (ADPL) is a self-contained and energy neutral on-site sanitation system using anaerobic digestion of fecal sludge to generate biogas and then uses the biogas to pasteurize the digester effluent at 65-75°C to produce a safe effluent that can be reused locally as a fertilizer. Two ADPL systems were insta...
Article
Full-text available
Polychlorinated biphenyls (PCBs) are classified as Persistent Organic Pollutants (POPs) regulated by the Stockholm Convention (2001). Although their production and use was stopped almost three decades ago, PCBs are environmental persistent, toxic, and bioaccumulate in biota. We assessed the levels of 7 PCB congeners (IUPAC nos. 28, 52, 101, 118, 13...
Article
Full-text available
This study assessed levels of selected heavy metals (Lead, Chromium and Cadmium) in oranges and mangoes sold in Eldoret town and their health implications to consumers. A total of one hundred and eighty (180) samples were collected for analysis from randomly selected market sites within Eldoret town. Samples were wet digested using a mixture of 1:3...
Article
Spring water is the common source of public water supply in most rural communities of developing countries such as Kenya. The water quality and quantity may be altered due to catchments degradation. This study was carried out in Tongaren division, Nzoia River catchment. The aim of this study was to investigate and map the occurrence and distributio...

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Projects

Projects (6)
Project
The overall objective of this study is to determine the effect of livestock movement within agro-pastoral systems on spatial and temporal dynamics of water quality and GHG emissions from livestock watering points in Taita Taveta County, Kenya. The specific objectives are: 1. determine water quality and physical characteristics of watering points (sizes of stream, age and size of pond/ pans, etc) that are precursors to GHGs emissions in different livestock production systems 2. determine the spatial and temporal dynamics of GHGs emissions and soil carbon stocks in riparian areas and sediments in watering points in different livestock production systems 3. determine soil carbon stocks in riparian zones and sediments of watering points for livestock in different livestock production systems 4. Empower the participation of livestock farmers through citizen science to identify and adopt livestock management practices for improved water quality and reduced GHG emissions
Archived project
Archived project