Please use this identifier to cite or link to this item: https://cris.library.msu.ac.zw//handle/11408/4174
Title: Development and evaluation of a low-cost ceramic filter for the removal of methyl orange, hexavalent chromium, and Escherichia coli from water
Authors: Chaukura, Nhamo
Katengeza, Gerald
Gwenzi, Willis
Mbiriri, Chiedza I.
Nkambule, Thabo TI.
Moyo, Mambo
Kuvarega, Alex Tawanda
Keywords: Biomass
Disinfection
Permeate
Pollution
Porous materials
Issue Date: 2020
Publisher: Elsevier Ltd
Series/Report no.: Materials Chemistry and Physics;Vol.249
Abstract: Lack of safe drinking water gives rise to waterborne diseases and other human health risks caused by various pollutants. Safe water provision in low-income countries is constrained by limited financial resources, and the problem is worsened during natural disasters. Thus, there is need to develop efficient low-cost technologies for point-of-use water treatment. Filtration using ceramic filters is a viable method as it uses locally available clay and biomass. The aim of this work was to develop and fabricate a laboratory-scale ceramic filter for water treatment, and to evaluate its capacity to remove Cr(VI), methyl orange (MO), and Escherichia coli 0157:H7 from water. Locally sourced clay and sawdust (SD) were used to fabricate filters with varying sawdust contents of 0, 2.5, 5, 10 and 30% (w/w). The clay-sawdust composites were fired in a muffle furnace at a heating rate of 200 °C/h up to 600, 750, and 900 °C for 3 h. Then the clay filter (CF) with the highest permeability was impregnated with silver nanoparticles (AgNP) to produce AgNP-CF. The surface charge, functional groups, surface morphology, and crystallinity of the filters were determined using the pH-drift method, Fourier transform infrared spectrometry, scanning electron microscopy, and X-ray powder diffraction, respectively. The permeability increased with biomass content and firing temperature. The AgNP-CF removed 57.3, 69.1, and 100% of Cr(VI), MO, and E. coli, respectively. Overall, the study demonstrated that AgNP-CF can potentially be used for water treatment in low-income communities.
URI: https://www.sciencedirect.com/journal/materials-chemistry-and-physics
http://hdl.handle.net/11408/4174
ISSN: 0254-0584
Appears in Collections:Research Papers

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