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Browsing Chemical Engineering by UP Author "Chirwa, Evans M.N."
Now showing items 1-20 of 138
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Bezza, Fisseha Andualem; Chirwa, Evans M.N. (Italian Association of Chemical Engineering, 2022)Arsenic (As) contamination is a major concern due to its toxicity and tendency to accumulate and bio-magnify within the food chain, causing wider damage to the ecosystem. In the current study, activated carbon-supported ...
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Tabana, Lehlogonolo Shane; Tichapondwa, Shepherd Masimba; Labuschagne, F.J.W.J. (Frederick Johannes Willem Jacobus); Chirwa, Evans M.N. (MDPI, 2020-05-22)Please read abstract in the article.
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Birungi, Z.S. (Zainab); Chirwa, Evans M.N. (Elsevier, 2015-12)Thallium (Tl) is a highly volatile and toxic heavy metal regarded to cause pollution even at very low con-centrations of several parts per million. Despite the extremely high risk of Tl in the environment, limitedinformation ...
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Khuzwayo, Zakhele Siyanda Prince; Chirwa, Evans M.N. (South African Institute of Chemical Engineers, 2017-06)Worldwide concerns of organic pollutant free water supply have attracted significant attention to the technological advances in water and wastewater treatment. Photocatalysis is one of the technologies that have been proven ...
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Malunga-Makatu, Khanyisile B.; Chirwa, Evans M.N.; Tichapondwa, Shepherd Masimba (The Italian Association of Chemical Engineering, 2023)The increasing concerns of climate change, energy generation, storage, consumption, and water pollution are topics that are gaining attention within modern research fields. This has led to numerous researchers devoting their ...
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Gidudu, Brian; Chirwa, Evans M.N. (MDPI, 2020-07-13)The remediation of soil contaminated with petrochemicals using conventional methods is very di cult because of the complex emulsions formed by solids, oil, and water. Electrokinetic remediation has of recent shown promising ...
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Gidudu, Brian; Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2019-10-25)The expeditious growth of the petroleum industry and its products in the last three decades has led to increased pollution of soil which is of great concern considering the effects it poses to the environment. Oil waste ...
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Igboamalu, Tony Ebuka; Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2017)Transition metal and metalloid oxyanions such as Cr-compound (CrO4-2) and As-compound (H3AsO3) are common pollutants routinely detected in effluent waste streams from the mining industry around the world. Biological treatment ...
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Igboamalu, Tony Ebuka; Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2018)Catalytic bio-oxidation of toxic Arsenite (As(III)) to Arsenate (As(V)) in a mixed culture of bacteria strains isolated from cow dip in Tzaneen (Limpopo Province South Africa) was investigated under anaerobic condition. ...
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Roestorff, Maria M.; Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2018)Chromium exits naturally in two oxidation states: hexavalent chromium (Cr(VI)) and trivalent chromium (Cr(III)). Cr(VI) is carcinogenic and mutagenic to living organisms and Cr(III) is 100 times less toxic than Cr(VI). ...
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Mugumo, Rachel; Ichipi, Emmanuel O.; Tichapondwa, Shepherd Masimba; Chirwa, Evans M.N. (Italian Association of Chemical Engineering, 2023)The combination of a wide bandgap Zinc oxide (ZnO ~3.4 eV) semiconductor photocatalyst with typical metallic sulphides, namely, silver sulphide (Ag2S), ferric sulphide (FeS) and nickel sulphide (NiS), all of a similar ...
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Lutsinge Nembudani, Tshilidzi Bridget; Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2019)One of the challenges faced during the bioremediation of Polycyclic Aromatic Hydrocarbons is the limited bioavailability of these compounds due to their hydrophobic nature. Polycyclic aromatic hydrocarbons (PAHs) known as ...
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Chirwa, Evans M.N.; Lutsinge Nembudani, Tshilidzi Bridget (The Italian Association of Chemical Engineering, 2018)The dissolution and degradation of higher ring-number polycyclic aromatic compounds were tested in batch and attached growth medium using soil biopile and fixed-film bioreactor systems. Bioavailability of polycyclic ...
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Chirwa, Evans M.N.; Molokwane, Pulane Elsie; Tikilili, Phumza V.; Makgato, Stanford S.; Bamuza-Pemu, Emomotimi E.; Jay, Lindelwa (The Italian Association of Chemical Engineering, 2018)In pursuing carbon emission free technologies in the energy industry, interest in nuclear energy has grown. However, technology for handling radioactive waste containing organic materials are lacking. Methods are ...
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Mbonambi, Nondumiso C.; Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2019-10)Hexavalent chromium (Cr(VI)) is highly soluble in water, but is widely used in industrial sectors for many purposes. The effluent from these industrial activities is often released to the environment posing a threat ...
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Mtimunye, Phalazane Johanna; Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2018)Nuclear energy has been proposed as an alternative energy source in the bid to reduce carbon emissions that results from fossil fuel. Hexavalent uranium [U(VI)] is the most abandoned radioactive waste discharged from nuclear ...
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Mtimunye, Phalazane Johanna; Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2017)Uranium (VI) contamination in the environment has become a global problem in aquifers, water supplies and other related ecosystems. Bioremediation has gained importance as a feasible and eco-friendly strategy in remediating ...
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Birungi, Z.S. (Zainab); Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2017)Thallium (Tl) and Cadmium (Cd) are listed among priority metallic pollutants known to cause irreversible health effects and easily magnify in the higher trophic levels of the food chain. Micro algae has a diversity ...
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Birungi, Z.S. (Zainab); Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2018)The use of biological material is an emerging and environmentally friendly technology with great prospects to effectively clean up toxic metals at low concentrations and possible recovery for re-use in industry. The ...
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Shen, Na; Chirwa, Evans M.N. (The Italian Association of Chemical Engineering, 2018)Biosorption is an eco-friendly and cost-effective way for recovering gold from high-volume and lowconcentration wastewater. In this study, the freshwater microalgae Scenedesmus obliquus AS-6-1 were used as biosorbent for ...
Now showing items 1-20 of 138