Browsing Research Articles [MEWES] by Author "Hilonga, Askwar"
Now showing items 1-20 of 34
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Alternative tanning technologies and their suitability in curbing environmental pollution from the leather industry: A comprehensive review.
China, Cecilia; Maguta, Mihayo; Nyandoro, Stephen; Hilonga, Askwar; Kanth, Swarna; Njau, Karoli (Elsevier Ltd., 2020-04-18)Chrome tanning remains the most favourite technology in the leather industry worldwide due to its ability to produce leather with attributes desirable for high-quality leather such as excellent hydrothermal stability, ... -
Approaches to the mitigation of ammonia inhibition during anaerobic digestion – a review
Mutegoa, Eric; Hilonga, Askwar; Njau, Karoli (IWA Publishing, 2020-06-03)The digestion process of organic waste rich in high ammonia content has always been a gridlock during methanogenesis process. The free ammonia may increase inhibition/toxicity, which in turn affects the microbial community ... -
Biodiesel production by sulfated mesoporous titania–silica catalysts synthesized by the sol–gel process from less expensive precursors
Shao, Godlisten N.; Sheikh, Rizwan; Hilonga, Askwar; Lee, Jae Eun; Park, Yeung-Ho; Kim, Hee Taik (Elsevier, 2012-11-21)A sulfated titania–silica composite (S-TSC) was obtained through surface modification of mesoporous titania–silica composite synthesized using less expensive precursors; titanium oxychloride and sodium silicate as titania ... -
Characterization of Polycaprolactone and Rice Husk Silica Composite (PCL-SiO2) by E-Spinning to Apply Supporter for Drug Release
Song, Sinae; Hilonga, Askwar; Kim, Hee Taik (IOP Publishing Ltd, 2017)Abstract. Polycaprolactone (PCL) is an interesting material to apply biomedical field owing to its biodegradability and biocompatibility which is suitable for a specific site with longer healing times. Blending the polymer ... -
Chitosan-coated liposomes of Carrisa spinarum extract: synthesis, analysis and anti-pneumococcal potency
Rubaka, Clarence; Gathirwa, Jeremiah; Malebo, Hamisi; Swai, Hulda; Sibuyi, Nicole; Hilonga, Askwar; Dube, Admire (ICE Publishing, 2023-02-16)In the present study, a chitosan (CS)-coated liposome (LipCsP-Chitosan) nanocarrier was fabricated for the delivery of Carissa spinarum (CsP) polyphenols to improve bioavailability and anti-pneumococcal potential against ... -
Development and Characterization of Nanovesicles Containing Phenolic Compounds of Carissa spinarum: Encapsulation, Release Kinetics, Antimicrobial Activity and Mathematical Modeling
Rubaka, Clarence; Gathirwa, Jeremiah; Malebo, Hamisi; Swai, Hulda; Hilonga, Askwar (Trans Tech Publications Ltd, 2023-05)The aim of this study was to develop and characterize a delivery system for polyphenols from an extract of Carissa spinarum leaves, based on liposomes. Liposomes loaded with Carissa spinarum polyphenols (nanoliposomal CsP) ... -
Dynamics of Kaolinite-Urea Nanocomposites via Coupled DMSO-Hydroxyaluminum Oligomeric Intermediates
Sempeho, Siafu Ibahati; Kim, Hee Taik; Mubofu, Egid; Pogrebnoi, Alexander; Shao, Godlisten; Hilonga, Askwar (Hindawi Publishing Corporation Indian Journal of Materials Science, 2015)Kaolinite-urea nanocompositeswere prepared via intercalation reactions in an attempt to investigate the dynamic nature of kaolinite morphology for advanced applications in controlled release systems (CRS). Characterization ... -
Effect of mixing ratios of natural inorganic additives in removing ammonia and sulfide in the liquid phase during anaerobic digestion of slaughterhouse waste
Mutegoa, Eric; Malima, N; Hilonga, Askwar; Njau, Karoli (Elsevier, 2021-06-01)In this study, the efficacy of inorganic additives in the removal of total ammonia nitrogen (TAN) and sulfide in the aqueous phase of slaughterhouse waste undergoing anaerobic digestion in the batch reactor was investigated. ... -
Encapsulated Urea-Kaolinite Nanocomposite for Controlled Release Fertilizer Formulations
Sempeho, Siafu Ibahati; Kim, Hee Taik; Mubofu, Egid; Pogrebnoi, Alexander; Shao, Godlisten; Hilonga, Askwar (Hindawi Publishing Corporation Journal of Chemistry, 2015)Urea controlled release fertilizer (CRF) was prepared via kaolinite intercalation followed by gum arabic encapsulation in an attempt to reduce its severe losses associated with dissolution, hydrolysis, and diffusion. ... -
Enhancement of porosity of sodium silicate and titanium oxychloride based TiO2–SiO2 systems synthesized by sol–gel process and their photocatalytic activity
Shao, Godlisten N.; Kim, Yuna; Imran, S.M.; JeongJeon, Sun; Sarawade, Pradip B.; Hilonga, Askwar; Kim, Jong-Kil; Kim, Hee Taik (Elsevier, 2013-09-15)The textural properties of TiO2–SiO2 composites (TSCs) were successively enhanced using three approaches; (1) washing the hydrogels with different solvents, (2) using surfactant and (3) forming the TiO2 sol in ethanol ... -
Evaluating the level of ammonia and sulfide in the liquid phase during anaerobic digestion of slaughterhouse waste operating at mesophilic scale digester—the impact of inhibition and process performance
Mutegoa, Eric; Kandola, Isack; Hilonga, Askwar; Njau, Karoli (AIMS Press, 2020-07-10)The performance of experimental batch-reactor loaded with slaughterhouse waste at mesophilic temperature was investigated as well as the inhibition of both ammonia and sulfide concentration in the aqueous phase. The digester ... -
Fish bladder-based activated carbon/Co3O4/TiO2 composite electrodes for supercapacitors
Sirengo, Keith; Jande, Yusufu; Kibona, Talam; Hilonga, Askwar; Muiva, Cosmas; King'ondu, Cecil (Elsevier B.V., 2019-06-15)Cobalt oxide/titanium dioxide/activated carbon (Co3O4/TiO2/Ac) composite was synthesized using simple sol-gel method before annealing at 300 °C. Fish bladder derived porous carbon used for the composite was synthesized by ... -
Functional impacts of polyaniline in composite matrix of photocatalysts: an instrumental overview
Oyetade, Joshua; Machunda, Revocatus; Hilonga, Askwar (Royal Society of Chemistry, 2023-05-22)The challenges associated with photocatalysts including their agglomeration, electron–hole recombination and limited optoelectronic reactivity to visible light during the photocatalysis of dye-laden effluent make it necessary ... -
In-situ synthesis of calcium/magnesium phosphate system for water de-fluoridation: Clay ceramic materials
Mahene, Wilson; Hilonga, Askwar; Machunda, Revocatus (Elsevier, 2022-02-15)Clay ceramic water filters impregnated with silver colloids have been used to purify water in many parts of East Africa disregarding the removal of fluoride, which is a health-threatening ion in water supplies. This paper ... -
Influence of aging conditions on textural properties of water-glass-based silica aerogels prepared at ambient pressure
Sarawade, Pradip Bhikaji; Kim, Jong-Kil; Hilonga, Askwar; Kim, Hee Taik (Springer US, 2010-06-04)The experimental results of aging time and temperature on the textural properties of water-glass (sodium silicate)-based silica aerogels are reported and discussed. Aging of the hydrogel for different times and temperatures led ... -
Inorganic Nanocarriers: Surface Functionalization, Delivery Utility for Natural Therapeutics - A Review
Rubaka, Clarence; Gathirwa, Jeremiah; Malebo, Hamisi; Swai, Hulda; Hilonga, Askwar (Scientific.Net, 2022-08)Inorganic nanocarriers for a decade have increased interest in nanotechnology research platform as versatile drug delivery materials. The utility of the inorganic nanocarriers for delivery of therapeutic agents is attributed ... -
Investigation of functional performance of treatment systems for textile wastewater in selected textile industries in Tanzania
Oyetade, Joshua; Machunda, Revocatus; Hilonga, Askwar (IWA Publishing, 2023-02-01)Textile industrialization is an integral part of the economic growth in Tanzania. However, the corresponding wastewater from textile treat ment processes consists of dyes and auxiliaries associated with acute toxicological ... -
Life cycle analysis of potential municipal solid wastes management scenarios in Tanzania: the case of Arusha City
Richard, Edwin; Hilonga, Askwar; Machunda, Revocatus; Njau, Karoli (Springer Nature, 2021-01-07)The municipal solid wastes (MSW) management technologies in most cities of developing countries pose a continuous risk of contaminating the environment and affecting human health adversely; often because MSW technologies ... -
Meticulous Overview on the Controlled Release Fertilizers
Sempeho, Siafu Ibahati; Kim, Hee Taik; Mubofu, Egid; Hilonga, Askwar (Hindawi Publishing Corporation Advances in Chemistry, 2014-08-28)Owing to the high demand for fertilizer formulations that will exhaust the possibilities of nutrient use efficiency (NUE), regulate fertilizer consumption, and lessen agrophysicochemical properties and environmental adverse ... -
Performance evaluation of in situ Fenton-mediated photocatalysis of industrial dye effluent with enhanced TiO2 nanoparticle
Oyetade, Joshua; Hilonga, Askwar; Machunda, Revocatus (IWA Publishing, 2023-05-17)Effluents resulting from the frequent use of industrial azo dyes in textile operations have posed great toxicological impacts on man and the environment. The limitations of conventional treatment infrastructure necessitate ...