Browsing by Author "Machunda, Revocatus"
Now showing items 1-20 of 134
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Adsorption of phenol and methylene blue contaminants onto high-performance catalytic activated carbon from biomass residues
Bih, Numfor; Rwiza, Mwemezi; Ripanda, Asha; Mahamat, Assia; Machunda, Revocatus; Choi, Joon (Cellpress, 2025-01-15)Organic contaminants from wastewater toxicity to the environment has increased during the last few decades and, therefore, there is an urgent need to decontaminate wastewater prior to disposal. This study aimed to create ... -
Adsorption-capacitive deionization hybrid system with activated carbon of modified potential of zero charge
Sufiani, Omari; Elisadiki, Joyce; Tanaka, Hideki; Teshima, Katsuya; Sahini, Mtabazi; Machunda, Revocatus; Jande, Yusufu (Elsevier, 2023-02-15)In this study water solutions are desalinated with carbon electrodes of modified surface charges. The idea is to endow the electrodes with the ability to physically adsorb salt ions without applying potential so as to save ... -
Agrochemicals use in horticulture industry in Tanzania and their potential impact to water resources
Lema, Emmy; Machunda, Revocatus; Njau, Karoli (International Journal of Biological and Chemical Sciences, 2014-04)The objective of this review was to analyze the existing information on the use of agrochemicals (Fertilizers and Pesticides) in the Tanzanian horticulture industry especially the Northern regions and their potential to ... -
Antibiotic Resistance Patterns of Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa Isolated from Hospital Wastewater
Karungamy, Petro; Rugaika, Anita; Mte, Kelvin; Machunda, Revocatus (Applied Microbiology, 2023-07-08)Antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in treated hospital wastewater effluents constitute a major environmental and public health concern. The aim of this study was to investigate the ... -
Antibiotic-resistant microbial populations in urban receiving waters and wastewaters from Tanzania
Ripanda, Asha; Rwiza, Mwemezi; Nyanza, Elias; Miraji, Hossein; Bih, Numfor; Mzula, Alexanda; Mwega, Elisa; Njau, Karoli; Vuai, Said; Machunda, Revocatus (Elsevier, 2023)Antimicrobial resistance against certain medications in the pathogenic microbial community is globally increasing due to the continual discharge and disposal of pharmaceuticals in the environment. The phenomenon resulted ... -
Assessment of agrochemical residues in wastewater from selected horticultural farms in Arusha, Tanzania
Emmy, Lema; Machunda, Revocatus; Njau, Karoli (International Journal of Environmental Sciences, 2015-09-07)Arusha region in Tanzania has been involved for quite some time on commercial horticulture. The use of agrochemicals results to increased crop productivity and consequently offers farmers major economic returns. However, ... -
Assessment of Fluoride Bioaccumulation Potential in African Catfish (Clarias gariepinus) Reared in Fluoride Rich Water
Bejumula, Jophillene; Machunda, Revocatus; Pasape, Liliane; Mtei, Kelvin (University of Dar es Salaam, 2021-05)Fluoride bioaccumulation in fish poses a significant impact on their growth, survival and consequently to upper trophic levels. Few studies have reported the impacts of high fluoride concentrations and their accumulation ... -
Assessment of fluoride removal in a batch electrocoagulation process: A case study in the Mount Meru Enclave
Mureth, Risala; Machunda, Revocatus; Njau, Karoli; Dodoo-Arhin, David (Elsevier B.V., 2021-03-04)The presence of excessive amounts of fluoride than prescribed standards has been reported in various sources of domestic water supply around the slopes of Mount Meru and other parts in Tanzania. Efforts to remove the ... -
Assessment of fluoride removal in a batch electrocoagulation process: A case study in the Mount Meru Enclave.
Mureth, Risala; Machunda, Revocatus; Njau, Karoli; Arhin, David (Elseiver, 2021-03-01)The presence of excessive amounts of fluoride than prescribed standards has been reported in various sources of domestic water supply around the slopes of Mount Meru and other parts in Tanzania. Efforts to remove the ... -
The Assessment of Heavy Metals and Natural Radioactivity in the Phosphate Tailings at Minjingu Mines in Tanzania
Mdach, Daniel; Rugaika, Anita; Machunda, Revocatus (Journal of Ecological Engineering, 2024-04-12)Extraction and processing of the phosphate rocks has produced a massive amount of waste and posed a significant environmental concern. The majority of wastes generated in the fertiliser industry are overburden or waste ... -
Assessment of water quality variation in rivers through comparative index technique and its reliability for decision making
Kitalika, Aldo; Machunda, Revocatus; Komakech, Hans; Njau, Karoli (Tanzania Journal of Science, 2018)The National Sanitation Foundation (NSF) and Weighed Arithmetic Index (WAI) methods for water quality index (WQI) have been studied to evaluate their reliability in water quality assessment in rivers. Water samples were ... -
Biomass-based carbon electrode materials for capacitive deionization: a review
Elisadiki, Joyce; Kibona, Talam; Machunda, Revocatus; Saleem, Muhammad; Kim, Woo-Seung; Jande, Yusufu (Springer Nature Switzerland AG., 2019-06-27)Capacitive deionization (CDI) is a promising water purification technology which works by removing salt ions or charged species from aqueous solutions. Currently, most of the research on CDI focuses on the desalination of ... -
Building partnership for participatory sanitation and hygiene planning: lessons and experience from Tanzania
Beale, Jaanne; Banzi, Joseph; Machunda, Revocatus; Shana, Edward; Kisaka, A (WEDC International Conference, 2018-10-29) -
Capacitive deionization for water desalination using Na3Fe2(PO4)3/activated carbon composite electrodes
Sufiani, Omari; Alfredy, Tusekile; Tanaka, Hideki; Teshima, Katsuya; Machunda, Revocatus; Jande, Yusufu (Elsevier, 2025-05-28)Water desalination technologies are attracting growing global attention as critical solutions to address water scarcity torturing mankind worldwide. Capacitive deionization (CDI) is an emerging desalination technology that ... -
Capacitive deionization: Capacitor and battery materials, applications and future prospects
Sufiani, Omari; Tanaka, Hideki; Teshima, Katsuya; Machunda, Revocatus; Jande, Yusufu (Elsevier, 2024-09-15)Water scarcity all over the world attracts alternative methods to purify saline water and supplement the available dwindling freshwater resources. Capacitive deionization (CDI) is hopeful to supply water to the population ... -
Cattle dung production, management and utilization practices in the smallholding dairy farming systems of East Africa: A situational analysis in Lushoto District, Tanzania
Rukiko, Patrick; Machunda, Revocatus; Mtei, Kelvin (Journal of Biodiversity and Environmental Sciences, 2018-04-30)This focus review aims to update the dung and manure production, management and utilization in the East African countries and its associated challenges particularly in the case of Lushoto district, in northern Tanzania. ... -
Cattle dung production, management and utilization practices in the smallholding dairy farming systems of East Africa: A situational analysis in Lushoto District, Tanzani
Rukiko, Patrick; Machunda, Revocatus; Mtei, Kelvin (INNSPUB, 2018-04-30)This focus review aims to update the dung and manure production, management and utilization in the East African countries and its associated challenges particularly in the case of Lushoto district, in northern ... -
Cockle (Anadara granosa) shells-based hydroxyapatite and its potential for defluoridation of drinking water
Mtavangu, Stanslaus; Mahene, Wilson; Machunda, Revocatus; Bruggen, Bart; Njau, Karoli (Elsevier, 2022-03-03)The present study describes the synthesis and characterization of a hydroxyapatite (HAp)-based adsorbent derived from biogenic cockle (Anadara granosa) shells for the defluoridation of drinking water. The raw cockle shells ... -
Cockle (Anadara granosa) shells-based hydroxyapatite and its potential for defluoridation of drinking water
Mtavangu, Stanslaus; Mahene, Wilson; Machunda, Revocatus; Bruggen, Bart; Njau, Karoli (Elsevier, 2022-02-27)The present study describes the synthesis and characterization of a hydroxyapatite (HAp)-based adsorbent derived from biogenic cockle (Anadara granosa) shells for the defluoridation of drinking water. The raw cockle shells ... -
Combatting toxic chemical elements pollution for Sub-Saharan Africa's ecological health
Ripanda, Asha; Hossein, Miraji; Rwiza, Mwemezi; Nyanza, Elias; Selemani, Juma; Nkrumah, Salma; Bakari, Ramadhani; Alfred, Mateso; Machunda, Revocatus; Vuai, Said (Elsevier, 2025-02-08)With its booming mining, processing industries, agriculture, and increasing urbanization, sub-Saharan Africa experiences an alarming rise in accumulation of toxic chemical elements in all environmental matrices threatening ...