A5085309275- Pharmaceutical and Antibiotic Environmental Impacts
- Advanced Cellulose Research Studies
- Malaria Research and Control
- Air Quality and Health Impacts
- Heavy metals in environment
- Aquatic Ecosystems and Biodiversity
- Supramolecular Self-Assembly in Materials
- Analytical Chemistry and Chromatography
- Polydiacetylene-based materials and applications
- Adsorption and biosorption for pollutant removal
- Antibiotic Use and Resistance
- Mosquito-borne diseases and control
- Toxic Organic Pollutants Impact
- SARS-CoV-2 detection and testing
- Vehicle emissions and performance
- Nanoparticles: synthesis and applications
- Antibiotics Pharmacokinetics and Efficacy
- Thermochemical Biomass Conversion Processes
- Microplastics and Plastic Pollution
- Advanced Chemical Sensor Technologies
- Ocular Surface and Contact Lens
- Water Treatment and Disinfection
- Biodiesel Production and Applications
- Natural Fiber Reinforced Composites
- Biofuel production and bioconversion
Jomo Kenyatta University of Agriculture and Technology
2015-2024
Domino (United Kingdom)
2017
African Institute for Capacity Development
2005
African Institute for Development Policy
2005
University of Plymouth
1994-1995
University of Hull
1991-1993
Herein, we report a stimuli-responsive hydrogel with inhibitory activity against Escherichia coli prepared by chemical crosslinking of carboxymethyl chitosan (CMCs) and hydroxyethyl cellulose (HEC). The hydrogels were esterification (Cs) monochloroacetic acid to produce CMCs which then chemically crosslinked HEC using citric as the agent. To impart stimuli responsiveness property hydrogels, polydiacetylene-zinc oxide (PDA-ZnO) nanosheets synthesized in situ during reaction followed...
Comparison of matrix-matched and internal standard calibration methods in the analysis selected antibiotics antiretroviral drugs urban waters by SPE-LC-MS/MS.
Presence of antimicrobial cocktails in the hydrological cycles is interest because their potential to mediate resistance within natural environment. In this study, we determined concentrations selected antibiotics and antiretroviral drugs (ARVDs) wastewater treatment plant (WWTP) effluent, effluent suspended particulate matter (SPM), surface waters river sediments Kenya order determine extent pollution sampled Target analysis for most common ARVDs was done. Sulfamethoxazole (SMX),...
Cellulose is an inexpensive, renewable, bio-based and abundant raw material suitable for the development of filter membranes water purification.This because it has numerous functional groups that afford ease modification to create active surfaces upon chemical modification.In this study, cellulose was isolated from two biomasses, namely, Eichhornia crassipes Cyperus papyrus using soda process followed by bleaching with peracetic acid.The percent yield nanofibrils (CNF) obtained E. C. found...
Over reliance on charcoal has accelerated deforestation in sub-Saharan Africa. Seeking alternative sustainable and environmentally friendly sources of biomass energy to meet the escalating demand is therefore vital. However, limited evidence exists concentrations toxic emissions different fuels. Herein, dried human faeces sawdust were pyrolyzed at 350 °C produce biochar mixed equal ratio briquettes through densification, with molasses (10 wt.%) used as a binder. A comparative study heating...
To attain the zero waste and green chemistry goals, much emphasis has shifted toward use of cellulose derived from agricultural biomass. In this study, carboxymethylation microcrystalline coconut fiber by monochloroacetic acid in presence an alcohol medium under alkaline conditions was suitable for synthesis carboxymethyl cellulose. The prepared, physical properties, degree substitution, swelling capacity, characterization were investigated. results indicated that yield cellulose, capacity...
Abstract Active pharmaceutical ingredients (APIs) are only partially removed by convectional wastewater treatment plants. This study aimed at assessing the post‐treatment degradation of selected antibiotics and antiretroviral drugs direct UV photolysis advanced oxidation processes (UV/H 2 O UV/Cl ) using low‐pressure mercury lamp. The rate largely followed pseudo first‐order reaction kinetics. Amongst six studied APIs, sulfamethoxazole, ciprofloxacin zidovudine were readily degraded more...
Cellulose nanocrystals (CNCs) or cellulose nanofibers (CNFs) with different morphologies, chemical, mechanical and physical properties can be obtained when microcrystalline is subjected to enzymatic, chemical treatment. With the aim of utilizing nanofibrils from Oryza sativa, we isolated using Kraft process, followed by successive fiber fibrillation grinding, then (2,2,6,6-Tetramethylpiperidin-1-yl)oxyl (TEMPO) mediated oxidation. Analysis pulp fibers after each treatment step revealed that...
Recently, there has been an increased interest in bridging the knowledge gap occurrence and fate of pharmaceuticals African urban water cycles. In this study, 7 antibiotics 3 antiretrovirals source-separated urine, groundwater, wastewater surface peri-urban area Chunga Lusaka, Zambia, was studied. were only sporadically present with 4 1 antiretroviral detected. The concentration ranged from below limit quantification (<LOQ) to 880 ng/L, sulfamethoxazole having highest detection frequency...
A liquid chromatographic method coupled with inductively plasma mass spectrometry for the speciation of methylmercury chloride, mercury(II) chloride and ethylmercury in sea-water is described. The three species were eluted from a C18 column (150 × 3.2 mm id) at 260, 340 750 s, respectively, mobile phase 1% v/v acetonitrile 0.005% 2-mercaptoethanol 0.06 mol l–1 ammonium acetate pumped 1.0 ml min–1. total mercury determined TORT-1 Lobster Hepatopancreas (350 ± 62 µg l–1) was good agreement...
Recently, there has been an increased interest in bridging the knowledge gap occurrence and fate of pharmaceuticals African urban water cycles. In this study, 7 antibiotics 3 antiretrovirals source-separated urine, groundwater, wastewater surface peri-urban area Chunga Lusaka, Zambia, was studied. were only sporadically present with 4 1 antiretroviral detected. The concentration ranged from below limit quantification (<LOQ) to 880 ng/L, sulfamethoxazole having highest detection frequency...
Microcrystalline cellulose (MCC) powders extracted from banana stem, rice straws, water hyacinth and papyrus reeds were investigated for their physicochemical properties.Preparation of the MCC was carried out using alkali hydrolysis process followed by further treatment peracetic acid.The lignocellulosic biomasses first treated with aqueous sodium hydroxide to remove lignin hemicelluloses a solution acid at 80 0 C 2 hours residual hemicellulose.The obtained then bleached 20% hydrogen...
This work aimed to extract and characterize microcrystalline cellulose from coir fibers. Extraction was achieved in a two-step process which the fibers were treated with sodium hydroxide for 3 h at 100°C followed by bleaching peracetic acid remove residual lignin hemicellulose. The powder characteristics such as bulk density, tapped angle of repose swelling ratio found be 0.08 ± 0.00 g/cm3, 0.12 0.0 38° 8.15 0.14 g/g, respectively. Fourier transform infrared spectroscopy exhibited...