Browsing Research Articles [MEWES] by Author "Hilonga, Askwar"
Now showing items 21-34 of 34
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Performance of constructed wetland integrated with sand filters for treating high turbid water for drinking
Mtavangu, Stanslaus; Rugaika, Anita; Hilonga, Askwar; Njau, Karoli (IWA Publishing, 2017-03)The feasibility of constructed wetland integrated with sand filters (CW-SFs) for treating high turbid water for drinking was investigated. Turbid water of .1,000 NTU from Nadosaito dam in Monduli District, Tanzania was ... -
Performance of water filters towards the removal of selected pollutants in Arusha, Tanzania.
Kiagho, Beatrice; Machunda, Revocatus; Hilonga, Askwar; Njau, Karoli (University of Dar es Salaam, 2016)This paper presents the findings of a study carried out to investigate the efficiency of selected common water filters in the removal of Escherichia coli, organic matter and fluoride. Additionally, the Total Suspended ... -
Photocatalytic degradation of azo dyes in textile wastewater by Polyaniline composite catalyst-a review
Oyetade, Joshua; Machunda, Revocatus; Hilonga, Askwar (Elsevier B.V., 2022-09)Azo dyes in industrial textile and dye effluent (5–30%) have become irresistibly recalcitrant and toxic to both treatments and the environment respectively. Global concerns about the persistent nature of these dyes and the ... -
Preparation of activated carbon with disered properties through optimization of impregnating agent
Mutegoa, Eric; Onoka, Isaac; Hilonga, Askwar (Rjeas, 2014)In this study, activated carbon with desired properties was prepared from peanut shell and sugarcane bagasse using chemical activation method in which potassium hydroxide (KOH) was used as a impregnating agent. The ... -
Preparation of aluminium sulphate from kaolin and its performance in combination tanning
China, Cecilia; Hilonga, Askwar; Maguta, Mihayo; Nyandoro, Stephen; Kanth, Swarna V.; Jayakumar, Gladstone; Njau, Karoli (SN Applied Sciences, 2019-07-25)Leather making commonly use chromium salts to produce high quality products. However, the use of chromium salts is compromised by environmental safety concerns. Combination tanning using vegetable tanning coupled with ... -
Quantitative recovery of high purity nanoporous silica from waste products of the phosphate fertilizer industry
Elineema, Gideon; Kim, Jong Kil; Hilonga, Askwar; Shao, Godlisten Namwel; Kim, You-Na; Quang, Dang Viet; Sarawade, Pradip B.; Kim, Hee Taik (Elsevier, 2013-01-25)This study reports on the quantitative recovery of high purity nanoporous silica from wastes material (H2SiF6) of the phosphate fertilizer industry and Na2O·SiO2. The silica recovered from the wastes was compared with ... -
Release Kinetic Models of Vanillin and Physicomechanical Properties of Thermoplastic Starch and Chitosan Nanocomposite Films: Effects of Mixing Order
Mlalila, Nichrous; Hilonga, Askwar; Kaale, Lilian; Swai, Hulda (Springer Nature Switzerland AG., 2020-02-20)The effects of mixing sequence of starch–chitosan nanocomposite films on antimicrobial properties of vanillin, the release kinetics of vanillin, and physicomechanical changes of films have been reported. Four types of films ... -
A review on strategies to optimize metabolic stages of anaerobic digestion of municipal solid wastes towards enhanced resources recovery
Richard, Edwin; Hilonga, Askwar; Machunda, Revocatus; Njau, Karoli (BioMed Central Ltd, 2019-12-17)Recently, there are increased efforts by municipals and researchers to investigate the potential of utilizing municipal solid wastes (MSW) for resources recovery. In many parts of developing countries, MSW is mostly collected ... -
A review on strategies to optimize metabolic stages of anaerobic digestion of municipal solid wastes towards enhanced resources recovery
Richard, Edwin; Hilonga, Askwar; Machunda, Revocatus; Njau, Karoli (BMC, 2019)Recently, there are increased efforts by municipals and researchers to investigate the potential of utilizing municipal solid wastes (MSW) for resources recovery. In many parts of developing countries, MSW is mostly collected ... -
Suitability of selected vegetable tannins traditionally used in leather making in Tanzania
China, Cecilia; Hilonga, Askwar; Nyandoro, Stephen; Schroepfer, Michaela; Kanth, Swarna; Meyer, Michael; Njau, Karoli (Elsevier Ltd., 2020-04-01)The use of chromium salt has dominated in tanning industry worldwide due to its high versatility in quality leather production. However, Environmental concerns of chromium have shifted the interest of current research to ... -
Synthesis and characterization of micrometer-sized silica aerogel nanoporous beads
Sarawade, Pradip B.; Quang, Dang Viet; Hilonga, Askwar; Jeon, Sun Jeong; Kim, Hee Taik (Elsevier, 2012-08-15)Here we report the preparation of micrometer-sized highly nanoporous, relatively trasperant silica aerogel beads with high surface area as well as large pore volume with sizes ranging from 165 to 395 μm. The wet micrometer-sized ... -
Synthesis and FTIR Characterization of Mg-Hydroxylapatite Derived from Dolostone with High Dolomite Mineral Content
Mahene, Wilson; Gervas, Charles; Hilonga, Askwar; Machunda, Revocatus (University of Dar es Salaam, 2020-08-24)We present the synthesis of magnesium-substituted hydroxylapatite starting from locally available dolostone. The apatite was prepared by a reaction between heat pre-treated dolostone powder with phosphoric acid, maintained ... -
Synthesis of mesoporous silica with superior properties suitable for green tire
Hilonga, Askwar; Kim, Jong-Kil; Sarawade, Pradip B.; Quang, Dang Viet; Shao, Godlisten N.; Elineema, Gideon; Kim, Hee Taik (Elsevier, 2012-09-25)In this article we report synthesis of mesoporous silica with superior properties for application in green tire (environmentally friendly tire) as filler. The synthesis was done using a newly innovated apparatus which ... -
Two-stage banana leaves wastes utilization towards mushroom growth and biogas production
Richard, Edwin; Hilonga, Askwar; Machunda, Revocatus; Njau, Karoli (Springer Nature Switzerland AG., 2020-11-20)Banana leaves wastes (BL) were subjected to fungal treatment using Pleurotus ostreatus to produce edible mushrooms and biogas in the anaerobic digestion process. Effects of fungal treatment on mushrooms production, lignin ...