Browsing Materials, Energy, Water and Environmental Sciences by Author "Rwiza, Mwemezi"
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Adsorption and desorption processes of toxic heavy metals, regeneration and reusability of spent adsorbents: Economic and environmental sustainability approach
Bayuo, Jonas; Rwiza, Mwemezi; Choi, Joon; Mtei, Kelvin; Hosseini-Bandegharaei, Ahmad; Sillanpää, Mika (Elsevier, 2024-05-19)A growing number of variables, including rising population, water scarcity, growth in the economy, and the existence of harmful heavy metals in the water supply, are contributing to the increased demand for wastewater ... -
Analysis of land use and land-cover pattern to monitor dynamics of Ngorongoro world heritage site (Tanzania) using hybrid cellular automata-Markov model
Mwabumba, Mohamed; Yadav, Brijesh; Rwiza, Mwemezi; Larbi, Isaac; Twisa, Sekela (Elsevier, 2022)Assessment of land-use and land-cover (LULC) change of any region is one of the prominent features used in environmental resource management and its overall sustainable development. This study analyzed the LULC changes ... -
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 ... -
Applicability of bio-adsorbents synthesized from maize/corn plant residues for heavy metals removal from aquatic environments: an insight review
Bayuo, Jonas; Rwiza, Mwemezi; Mtei, Kelvin (EQA-International Journal of Environmental Quality, 2023-07-14)The underutilization of agricultural waste products in recent years has resulted in environmental issues owing to improper disposal. As a result, heavy metals removal from aqueous systems utilizing sorbent materials produced ... -
Artisanal and small-scale mining in Tanzania and health implications: A policy perspective
Rwiza, Mwemezi; Focus, Erasto; Bayuo, Jonas; Kimaro, Joseph; Kleinke, Matthias; Lyasenga, Theresia; Mosses, Jerry; Marwa, Janeth (Elsevier, 2023-03-17)The mineral sector, especially its small-scale subsector, has become significant in the emerging economies of the Global South. Tanzania is the focus of this policy exposition paper because, aside from Ghana and South ... -
Assessment of contamination level of a Tanzanian river system with respect to trace metallic elements and their fate in the environment
Gebreyohannes, Netsanet; Rwiza, Mwemezi; Mahene, Wilson (IWA Publishing, 2022-04-01)The quality of water and sediments from a marginally-studied river was investigated with respect to As, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn including their fractionation behavior and environmental risk. Samples were collected ... -
Assessment of Groundwater Quality under Changing Climate in Ngorongoro Conservation Area, Tanzania
Mwabumba, Mohamed; Jahangeer, Jahangeer; Beegum, Sahila; Yadav, Brijesh; Rwiza, Mwemezi (American Society of Civil Engineers, 2022-07)Understanding the hydrochemical composition of water resources in the Ngorongoro Conservation Area (NCA, Dodoma, Tanzania) related to climate variability is essential for sustainable development. Thus, the current study ... -
Assessment of the impact of groundwater pumpage on water supply sustainability in Zanzibar, Tanzania
Ali, Zuleikha; Rwiza, Mwemezi (Springer Nature Switzerland AG., 2020-10-23)In the present study, a 42-year record of rainfall and temperature from Airport and a 43-year rainfall record from Kizimbani meteorological station were analyzed to understand how these climatic variables are affecting ... -
Column design for groundwater hardness removal using cashew nut shells activated carbon with potential application in low-income communities
Mwakabole, Emmanuel; Rwiza, Mwemezi; Njau, Karoli (2020-01)tigated. Water hardness has a significant impact on groundwater, especially in arid and semi-arid regions, leading to wasted investments in borehole drilling and worsening accessibility to potable water. In many developing ... -
Comparative Study of Pb2+ Removals and Isotherms by Physically - and Chemically - Modified Agro - Wastes from Tanzania
Rwiza, Mwemezi; Lee, Su-yeon; Kim, Sang-don (Gwangju Institution of Science and Technology, 2016)Materials and Methods Raw corn and rice husk were washed several times using DIW to remove extraneous dirt and contaminants. The husks were then dried at 110 ºC overnight to remove moisture. Dried husks were then ground ... -
A comprehensive review on the decontamination of lead(II) from water and wastewater by low-cost biosorbents
Bayuo, Jonas; Rwiza, Mwemezi; Mtei, Kelvin (Royal Society of Chemistry, 2022-04-12)The disadvantages of conventional methods in water and wastewater management including the demand for high energy consumption, the creation of secondary toxic sludge, and operation cost are much too high for developing ... -
Contribution of Illicit Drug Use to Pharmaceutical Load in the Environment: A Focus on Sub-Saharan Africa
Ripanda, Asha; Rwiza, Mwemezi; Nyanza, Elias; Machunda, Revocatus; Vuai, Said (Hindawi, 2022-07-08)Illicit drug abuse and addiction are universal issues requiring international cooperation and interdisciplinary and multisectoral solutions. ese addictive substances are utilized for recreational purposes worldwide, ... -
Current status of textile wastewater management practices and effluent characteristics in Tanzania
Bidu, Jerome; Van der Bruggen, Bart; Rwiza, Mwemezi; Njau, Karoli (IWA Publishing, 2021-04-05)Textile wastewater from wet processing units is a major environmental problem. Most chemicals, including dyes, are only partly consumed, resulting in highly colored wastewater containing a variety of chemicals released ... -
Data from the batch adsorption of ciprofloxacin and lamivudine from synthetic solution using jamun seed (Syzygium cumini) biochar: Response surface methodology (RSM) optimization
Ripanda, Asha; Rwiza, Mwemezi; Nyanza, Elias; Bakari, Ramadhani; Miraji, Hossein; Njau, Karoli; Vuai, Said; Machunda, Revocatus (Elsevier, 2023-02)This dataset expresses the experimental data on the batch adsorption of ciprofloxacin and lamivudine from synthetic solution using jamun seed (JS) (Syzygium cumini) biochar. Independent variables including concentration ... -
Ecological consequences of microplastic pollution in sub-Saharan Africa aquatic ecosystems: An implication to environmental health
Moto, Edward; Hossein, Miraji; Bakari, Ramadhani; Mateso, Alfred; Selemani, Juma; Nkrumah, salma; Ripanda, Asha; Rwiza, Mwemezi; Nyanza, Elias; Machunda, Revocatus (KeAi, 2023-12-01)Microplastic pollution (MPs) emerged as a significant environmental concern due to its persistent nature. These MPs particles endure in waters, soils, and even the atmosphere, posing potential threats to the entire ... -
Efficacy of waste stabilization ponds and constructed wetlands adopted for treating faecal sludge in Africa: a review
Mwamlima, Petro; Njau, Karoli; Rwiza, Mwemezi (Taylor & Francis online, 2024-05-24)The generation of faecal sludge (FS) in capitals and urban settings of African countries outpaces the available storage, emptying, transportation and treatment technologies. The low technology-based treatment systems for ... -
Facile biosynthesis of Ag–ZnO nanocomposites using Launaea cornuta leaf extract and their antimicrobial activity
Makauki, Elizabeth; Mtavangu, Stanslaus; Onita, Basu; Rwiza, Mwemezi; Machunda, Revocatus (NM-AIST, 2013-11-14)The quest to synthesize safe, non-hazardous Ag–ZnO nanoomposites (NCs) with improved physical and chemical prop- erties has necessitated green synthesis approaches. In this research, Launaea cornuta leaf extract was ... -
Fluoride Sorption Using Zirconium ion-impregnated Macadamia Nutshell-Derived Biochar from Aqueous Solution: Adsorption Isotherms and Kinetic Modeling
Yegon, Andrew; Mtavangu, Stanslaus; Rwiza, Mwemezi; Machunda, Revocatus (Research Article, 2022-11-26)Zirconium ion-impregnated macadamia nutshell biochar (ZMNB) was synthesized and tested for its fluoride sorption capacity by exploiting batch experiments. Four temperatures (300, 400, 500, and 600 ℃) were used to pyrolyze ... -
Geochemistry of Potentially Toxic Elements in Soil and Sediments of a Tanzanian Small-Scale Gold Mining Area
Karungamye, Johnbosco; Rwiza, Mwemezi; Selemani, Juma; Marwa, Janeth (scientific research publishing, 2023-11-17)Small-scale gold mining is linked to significant environmental pollution by potentially toxic elements (PTEs). However, research on the pollution caused by such mining activities remains insufficient especially in ... -
Health Risk Assessment of Trace Elements in Soil for People Living and Working in a Mining Area
Focus, Erasto; Rwiza, Mwemezi; Mohammed, Najat; Banzi, Firmi (Hindawi, 2021-07-02)The present study used soils collected from a small-scale gold mine area to determine the health risks due to trace elements to the at-risk population in the study area. The work involved 74 soil samples from four sampling ...