Browsing Materials, Energy, Water and Environmental Sciences by Author "Rwiza, Mwemezi"
Now showing items 21-39 of 39
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Heavy metals risk assessment of water and sediments collected from selected river tributaries of the Mara River in Tanzania
Nkinda, Mihayo; Rwiza, Mwemezi; Ijumba, Jasper; Njau, Karoli (Springer Nature, 2021-06-25)This study investigated the levels of Pb, Hg, Cr, Cd, and As in water and sediments from the tributaries of the Mara River, Tanzania. Pollution risk of water and sediments was investigated using seven indices and fve ... -
Hydrogeochemical similarities and groundwater-surface water interactions for the karst hydrological system of northwest Rwanda
Umutoni, Monique; Selemani, Juma; Rwiza, Mwemezi; Wali, Umaru (Springer International Publishing, 2023-08)The groundwater of karst environments is vulnerable to pollution due to its heterogeneous nature and can be completely depleted due to its strong connection to surface water when predominantly driven by natural and ... -
The influence of gold mining on radioactivity of mining sites soil in Tanzania
Focus, Erasto; Rwiza, Mwemezi; Mohammed, Najat; Banzi, Firmi (International Journal of Environmental Quality, 2022-02-17)The activity of 226Ra, 232Th and 40K in soil samples were measured by gamma spectrometry using high purity germanium detector. The study involved 40 samples from four divisions: 10 samples each were drawn from the control ... -
Innovations and Sustainability: The Case of Improved Biomass Stoves' Adoption and Use in Tanzania
Rwiza, Mwemezi (Lund, Sweden – Spring, 2009)The adoption and continued use of improved stoves in the developing countries is of social, economic and environmental concern. In most developing countries, biomass-based energy accounts for more than 90% of all household ... -
Isotopic and hydrogeochemical characterization of groundwater and surface water from a mine site in Tanzania
Musiba, Musiba; Rwiza, Mwemezi (IWA Publishing, 2021-12-04)This study used the hydrochemical properties of water to reveal the causes of water quality degradation. The results showed that most samples located downstream of the mine tailings dam were slightly acidic with pH as low ... -
Land Use and Environmental Gradients Influence on Riparian Woody Plant Diversity and Structure in Lake Manyara Watershed Ecosystem, Tanzania
Kashindye1, Almas; Giliba, Richard; Mpanda, Mathew; Rwiza, Mwemezi; Selemani, Juma (Scientific Research Publishing, 2023-09-12)Riparian vegetations are important in supporting ecological connectivity between aquatic and terrestrial ecosystems. The structure and species composition of riparian woody plants have been subjected to multiple forces ... -
Levels and distribution of progesterone in receiving waters and wastewaters of a growing urban area.
Kasambala, Hildegard; Rwiza, Mwemezi; Mdegela, Robinson (Water Science & Technology, 2019-09-01)This study aimed at investigating the levels and distribution of progesterone in receiving waters and wastewaters in Arusha, a fast-growing urban area and the third largest city in Tanzania. Specifically, the study was ... -
Modeling and optimization of independent factors influencing lead(II) biosorption from aqueous systems: A statistical approach
Bayuo, Jonas; Rwiza, Mwemezi; Abukari, Moses; Pelig-Ba, Kenneth; Mtei, Kelvin (Elsevier, 2022-07)Lead, [Pb(II)] is a major hazardous contaminant that exists in the soil, surface, and groundwater as a result of human activities. It is carcinogenic in nature and causes damage to the liver, kidney, and bones as well as ... -
Modeling and optimization of trivalent arsenic removal from wastewater using activated carbon produced from maize plant biomass: a multivariate experimental design approach
Bayuo, Jonas; Rwiza, Mwemezi; Mtei, Kelvin (Springer Nature Limited, 2023-06-24)Globally, both industrialized and developing nations struggle with the issue of water pollution due to heavy metals. Human life depends on water, and when it is contaminated with dangerous heavy metals like arsenic, people’s ... -
Non-competitive and competitive detoxification of As (III) ions from single and binary biosorption systems and biosorbent regeneration
Bayuo, Jonas; Rwiza, Mwemezi; Mtei, Kelvin (Springer Nature Switzerland AG., 2023-01-14)The quantity of studies reporting on single-metal sorption systems is increasing every day while the elimination of heavy metals in binary and multisolute systems is seldom reported. Therefore, the biosorption and desorption ... -
Performance investigation of the slaughterhouse wastewater treatment facility: a case of Mwanza City Slaughterhouse, Tanzania
Michael, Semba; Paschal, Chrisogoni; Kivevele, Thomas; Rwiza, Mwemezi; Njau, Karoli (Water Practice & Technology, 2020-09-28)The present study engaged onsite operations and laboratory analysis for Mwanza City Slaughterhouse (MCS) wastewater to improve the efficiency of wastewater treatment of a newly installed facility. The MCS wastewater treatment ... -
Quantitative assessment of metal contamination and associated pollution risk in sediments from the Mara River in Tanzania
Nkinda, Mihayo; Rwiza, Mwemezi; Ijumba, Jasper; Njau, Karoli (Springer Nature Switzerland AG., 2020-10-21)For most rivers in sub-Saharan Africa, information about pollution indices related to sediments is sparse. Sedimentological research of rivers that empty into Lake Victoria is highly patchy and wide apart. The present study ... -
Rainfall and temperature changes under different climate scenarios at the watersheds surrounding the Ngorongoro Conservation Area in Tanzania
Mwabumba, Mohamed; Yadav, Brijesh; Rwiza, Mwemezi; Larbi, Isaac; Dotse, Sam-Quarcoo; Manoba, Andrew; Sarpong, Solomon; Kwawuvi, Daniel (Elsevier, 2022-04)Considering the high vulnerability of Northern Tanzania to climate change, an in-depth assessment at the local scale is required urgently to formulate sustainable adaptations measures. Therefore, this study analyzed the ... -
Removal of heavy metals from binary and multicomponent adsorption systems using various adsorbents – a systematic review
Bayuo, Jonas; Rwiza, Mwemezi; Sillanpää, Mika; Mtei, Kelvin (Research Society of Chemistry, 2023)The ecosystem and human health are both significantly affected by the occurrence of potentially harmful heavy metals in the aquatic environment. In general, wastewater comprises an array of heavy metals, and the existence ... -
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 ... -
Response surface optimization and modeling in heavy metal removal from wastewater—a critical review
Bayuo, Jonas; Rwiza, Mwemezi (Springer Nature, 2022-04-08)The existence of hazardous heavy metals in aquatic settings causes health risks to humans, prompting researchers to devise effective methods for removing these pollutants from drinking water and wastewater. To obtain optimum ... -
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 survey of irrigation water and soil quality that likely impacts paddy rice yields in Kilimanjaro, Tanzania
Mpanda, Fridolin; Rwiza, Mwemezi; Mtei, Kelvin (Springer Nature Switzerland AG., 2021-11-29)In this study, the impacts of irrigation water quality and soil characteristics on paddy rice yields were investigated. Standard spectroscopy and spectrometry methods were used to analyze irrigation water and irrigated ... -
Textile wastewater treatment in anaerobic reactor: Influence of domestic wastewater as co-substrate in color and COD removal
Bidu, Jerome; Njau, Karoli; Rwiza, Mwemezi; Bruggen, Bart (Elsevier, 2022-10-28)Treatment of textile wastewater with domestic wastewater as co-substrate was investigated in this study. Combined textile and domestic wastewater at different mixing ratios (100:0, 80:20, 60:40) was treated under anaerobic ...