Browsing Materials, Energy, Water and Environmental Sciences by Author "Machunda, Revocatus"
Now showing items 61-80 of 97
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Phycocyanin as a proxy for algal blooms in surface waters: case study of Ukerewe Island, Tanzania
Mchau, Geofrey; Makule, Edna; Machunda, Revocatus; Gong, Yun; Kimanya, Martin (IWA Publishing, 2019-01-08)Knowledge of the parameters that contribute to water body eutrophication is essential for proper monitoring and management of water quality for human consumption. This study assessed water quality parameters in relation ... -
Physicochemical and microbiological characterization and of hospital wastewater in Tanzania
Karungamye, Petro; Rugaika, Anita; Mtei, Kelvin; Machunda, Revocatus (Elsevier, 2023-08-25)Given the complex composition of hospital wastewater and the high risk of initiating disease outbreaks, comprehensive monitoring and treatment of hospital wastewater are required to prevent social and environmental ... -
Physicochemical and microbiological characterization and of hospital wastewater in Tanzania
Karungamye, Petro; Rugaika, Anita; Mtei, Kelvin; Machunda, Revocatus (Elseiver, 2023-08-25)Given the complex composition of hospital wastewater and the high risk of initiating disease outbreaks, comprehensive monitoring and treatment of hospital wastewater are required to prevent social and environmental ... -
Physicochemical and Microbiological Variations in Rivers on the Foothills of Mount Meru, Tanzania.
Kitalika, Aldo; Machunda, Revocatus; Komakech, Hans; Njau, Karoli (International Journal of Scientific & Engineering Research, 2017-09-09)Little is known on the physicochemical and microbiological changes in Nduruma, Tengeru and Maji ya Chai Rivers. Such important variations were studied during wet and dry seasons in 2015. Water samples from various ... -
Plant biomasses for defluoridation appropriateness : unlocking their potentials
Mwakabona, Hezron; Said, Mateso; Machunda, Revocatus; Njau, Karoli (Research Journal in Engineering and Applied Sciences, 2014)Fluoride and fluorosis are endemic to many countries including Tanzania. Performances of different materials for use in water defluoridation systems have been reported. Some of these materials are; alum, oxides and hydroxide ... -
Porous carbon derived from Artocarpus heterophyllus peels for capacitive deionization electrodes
Elisadiki, Joyce; Jande, Yusufu; Machunda, Revocatus; Kibona, Talam (Elsevier, 2019)Though pristine graphene exhibits remarkable mechanical and electronic properties, many electromechanical applications may come from chemically doping it with heteroatoms. The goal is to tune the atomic lattice and, in ... -
The Potential of Valorized Sisal Decorticated Waste in Rearing of Black Soldier Fly
Konyo, Aziza; Machunda, Revocatus; Pasape, Liliane; Mshandete, Anthony (MDPI, 2022-12-23)The use of sisal decorticated waste (SDW) for various applications is limited due to its high acidic content. This is the first study of its kind regarding the use of SDW as a substrate for the growth of the black soldier ... -
Potentials of agric wastes activated carbons for water softening
Rolence, Cecilia; Machunda, Revocatus; Njau, Karoli (Research Journal in Engineering and Applied Sciences, 2014)Various studies have been conducted to address softening of hard water. Ion exchange, electro-based techniques, membrane filtration and adsorption are the most reported techniques in softening hard water. In the present work, ... -
Preparation and Characterization of Biogenic Chitosan-Hydroxyapatite Composite: Application in Defluoridation
Wagutu, Agatha; Machunda, Revocatus; Jande, Yusufu (Cambridge University Press, 2018-02-20)In Northern Tanzania, high levels of fluoride in community drinking water supply is recognized as one of the major public health concern, the problem is further ameliorated by presence Escherichia coli and fecal coliform ... -
Regeneration of fluoride-saturated bone char by means of wood ash and heat
Lukikoa, King; Machunda, Revocatus; Ijumba, Jasper (International Society for Fluoride Research, Inc, 2016-12-08)The regeneration of fluoride ion (F)-saturated bone char with different concentrations of wood ash in distilled water and by heating was investigated. Samples of 100 g of regenerated bone char were added into plastic ... -
Remediation of Soils Contaminated by Fluoride Using a Fermentation Product of Seaweed (Eucheuma cottonii)
Moirana, Ruth; Mkunda, Josephine; Paradelo, Marcos; Machunda, Revocatus; Mtei, Kelvin (Hindawi, 2022-10-03)is study investigated the e cacy of fermented seaweed (Eucheuma cottonii) on the remediation of uoride-contaminated soil. e soil was amended with either 1.25, 3.0, or 5.0% (w/w) fermented seaweed (FSW), parallel with ... -
The removal of ciprofloxacin from synthetic wastewater in constructed wetland
Karungamye, Petro; Rugaika, Anita; Mtei, Kelvin; Machunda, Revocatus (Elsevier, 2023-04-08)Considering the health effects of antibiotics in the environment, effective monitoring and treatment technologies are needed to mitigate social and environmental impacts. The present study was carried out to investigate ... -
Removal of fluoride and pathogens from water using the combined electrocoagulation-inline-electrolytic disinfection process
Njau, Oscar; Otter, Philipp; Machunda, Revocatus; Rugaika, Anita; Wydra, Kerstin; Njau, Karoli (IWA Publishing, 2023-07-01)The consecutive removal of fluoride (defluoridation) and pathogens (disinfection) in drinking water through combined electrocoagulation-inline-electrolytic disinfection (EC–ECl2) process with aluminum and dimension-stable ... -
Removal of Hydrogen Sulfide from Biogas Using a Red Rock
Mrosso, Register; Machunda, Revocatus; Pogrebnaya, Tatiana P. (Hindawi, 2020-01-27)The potential of red rock (RR) materials for the removal of H2S from biogas was studied. The rock samples were collected, sieved, and organized in various particle size ranges such as 0.32-250 μm, 250-500 μm, 500-750 μm, ... -
Removal of lamivudine from synthetic solution using jamun seed (Syzygium cumini) biochar adsorbent
Ripanda, Asha; Rwiza, Mwemezi; Nyanza, Elias; Bakari, Ramadhani; Bakari, Ramadhani; Miraji, Hossein; Njau, Karoli; Vuai, Said; Machunda, Revocatus (Emerging Contaminants, 2023-09-01)Antiviral drugs such as lamivudine have been globally identified in the environment and marked as emerging pollutants of concern due to their bioactive extremity. Following therapeutic uses, approximately 70% of the oral ... -
A Review of Methods for Removal of Ceftriaxone from Wastewater
Karungamye, Petro; Rugaika, Anita; Mtei, Kelvin; Machunda, Revocatus (MDPI, 2022-08-02)The presence of pharmaceuticals in surface water and wastewater poses a threat to public health and has significant effects on the ecosystem. Since most wastewater treatment plants are ineffective at removing molecules ... -
A Review on Contaminants of Emerging Concern in the Environment: A Focus on Active Chemicals in Sub-Saharan Africa
Ripanda, Asha; Rwiza, Mwemezi; Nyanza, Elias; Njau, Karoli; Vuai, Said; Machunda, Revocatus (MDPI, 2021-12-22): Active chemicals are among the contaminants of emerging concern that are rarely covered in regulatory documents in sub-Saharan Africa. These substances are neither in the list of routinely monitored substances nor in ... -
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 ... -
The role of textural properties and surface chemistry of activated carbon support in catalytic deoxygenation of triglycerides into renewable diesel
Mahene, Wilson; Kivevele, Thomas; Machunda, Revocatus (Elseiver, 2023-07)The textural properties and surface chemistry of activated carbon support are commonly known to have influ- ence on the catalytic performance of catalysts. Many authors have assessed the effect of textural properties ...