Microplastics can be ingested by marine organisms and may lead to negative impacts at the base of food chains. This study investigated occurrence composition microplastics in sea-surface water sought evidence ingestion zooplankton. Surface seawater was collected using a stainless-steel bucket sieved directly through sieve (250-µm mesh), while 500-μm mesh net towed horizontally collect zooplankton, 11 georeferenced stations off Kenyan coast February 2017, on board national research vessel RV...

Tea production in the Kenyan Rift Valley uses high rates of nitrogenous fertilizer. Nitrates can be discharged to water bodies through leaching and surface run‐off. Nitrate levels above 10 mg/L –N cause methemoglobinemia which is fatal. A study monitor changes nitrate was carried out ten rivers within a tea plantation for three years. Water samples were obtained before after fertilizer application 2004, 2005, 2006. Nitrate‐nitrogen (–N) determined colorimetrically by cadmium reduction method...

<p>In Kenya, maize (<em>Zea mays</em> L.) is mainly grown on acid soils in high rainfall areas. These are known for low available phosphorus (P), partly due to its sorption by aluminium (Al) and iron oxides. The study determined soil P sorption, lime requirements the effects of pH, Al levels main growing acids highlands east west Rift Valley (RV), Kenya. Burnt containing 21% calcium oxide was used. were strongly extremely (pH 4.85-4.07), had exchangeable...

Abstract In developing countries, household energy use is highly variable and complex, yet emissions arising from fuel combustion indoors are typically poorly quantified. Polycyclic aromatic hydrocarbons (PAHs) emitted during the of organic fuels such as charcoal biomass. present study, multichannel polydimethylsiloxane rubber traps were used for gas‐phase PAH sampling extracted using a low–solvent volume plunger‐assisted solvent extraction method. Sixteen US Environmental Protection Agency...

Abstract Proximate analyses and decomposition profiles of solid fuels commonly used in Kenya were studied to determine their relative suitability for use as a clean efficient source energy households. The moisture, volatile matter, ash, fixed carbon content firewood, charcoal, briquette samples investigated, well under various temperature regimes. Except the ash sample, which deviated slightly likely due presence binders, all values within acceptable limits according International Energy...

Azo dyes are carcinogenic and if taken would lead to debilitating adverse health effects in animals, man aquatic organisms. In this study, novel Boron Doped Diamond (BDD) electrodes coated with silver nanoparticles were applied. Iron (11) sulphate was used as a supporting electrolyte electrocatalyst enhance the degradation efficiency. Degradation efficiency monitored by UV-VIS spectrometry while some of physico-chemical parameters determined standard methods for examination water wastewater...

The bioaccumulation of heavy metals and their distribution were investigated in selected marine bivalve mollusks genus (saccostreacucullata) oysters, (Mytilus edulis) mussels donax at Tudor creek Mombasa Kenya.An atomic absorption spectrometer was used this study to determine the concentration levels organisms' flesh shell, water, sediment rock samples.Heavy level among as follows: mussels: Zn> Fe> Cr>Pb> Cu>Mn>Cd, oysters: Cu>Pb>Mn> Cr> Cd donax: Zn>Fe >Cu >Pb> Cr>Mn> Cd.Heavy varied with...

The plant extracts of T. brownii and Acanthaceae spp. have been used as biocatalysts by several communities in Kenya to hasten anaerobic digestion. This study aimed at assessing the viability these two hastening availability nutrients from bioslurry ambient conditions. A controlled research design was followed using uncooked kitchen waste substrate for 28 retention days. Changes physicochemical properties available were monitored every 7 days wet chemistry spectroscopic methods. findings...

Biomass, a type of solid fuel, is widely regarded as more sustainable energy source than fossil fuels. Nonetheless, the combustion fuels produces ash that contains both essential and trace elements. The study sought to determine elemental compositions/levels specific biomass used in Kenya, well their potential impact. Acacia auriculiformis firewood charcoal were collected from Bomet, Narok, Taita-Taveta/Mombasa Kenyan Counties. Inductively Coupled Plasma Emission Spectrometry measure levels...

This study was done at Mlughi Agricultural demonstration farm in Bura, Taita Taveta County-Kenya to test upland rice varietal performance and di-ammonium fertilizer effects on panicle characteristics yield parameter. A randomized complete block design (RCBD) used with seven varieties three levels. The treatments were replicated thrice give a total of 63 treatment combinations or plots. experiment carried out for two seasons (short rains from October December 2018 long March May 2019)....

Abstract The high prevalence of dental fluorosis and bone mineralization deficiency as a result exposure to fluorides has increased in Kenya over the years due consumption water with elevated levels fluoride. World Health Organization (WHO) provides guideline 1.5 mg/L level fluoride drinking water. However, majority studies carried out last 40 plus have indicated very various regions, observed children adults living Rift valley central regions basaltic volcanic rocks. Unfortunately, this...

Abstract A vast number of people in developing countries rely on solid fuels, including wood and charcoal, for domestic energy supply. We have studied the gaseous polycyclic aromatic hydrocarbon (PAH) concentrations Kenyan homes order to better understand potential health risks associated with combustion practices advise mitigation strategies. comprehensive survey was conducted elucidate complex multi-faceted factors governing fuel use coastal inland regions. Results showed an almost equal...

Radicalization in waste-to-energy systems are on the rise to meet human energy demands. Biogas generation from kitchen wastes is one such scheme, though affected by poor yields and methane levels at low temperatures. In this research, biocatalytic extracts with fermentative properties were hereby assessed their potential fasten these processes increase biogas yield ambient The variations waste substrate anaerobic parameters elemental composition as well monitored a 28-day retention period....

This study investigated the effect of applying nitrogenous fertilizers on morphological traits in six paddy rice varieties Taveta, Kenya. The varieties, including local control, were tested during 2018 and 2019 seasons. experiments laid out a split-plot design with three replications. main plot was fertilizer treatment while subplot NIBAM-11, K2-9, MWIR-2, R-1081, Silewa, control Saro. treatments no fertilizer, farm yard manure (FYM) alone, FYM+Urea FYM+CAN fertilizer. Significant...