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Communications in Science and TechnologyCommunications in Science and TechnologyThis study presents a novel approach to fabricate alkali-treated aluminum (ATA) foil for point-of-use (POU) water disinfection, addressing the residue issue associated with conventional production methods. Traditional ATA foil production leaves a residual layer that hinders practicality in use. To cope with it, a supernatant Mg(OH)2 solution was employed, resulting in residue-free ATA foil. Two variants, conventional ATA foil (ATA foil-1) and supernatant-treated ATA foil (ATA foil-2), were fabricated and analyzed. Surface characterization revealed that ATA foil-2 had a smoother surface with fewer cracks while maintaining E. coli removal efficiency and methyl orange adsorption capacity similar as ATA foil-1. Maximum E. coli adsorption capacities were found at 572,967 CFU/cm2 for ATA foil-1 and 561,513 CFU/cm2 for ATA foil-2. Both foils achieved over 84% methyl orange removal, indicating adsorption as the primary removal mechanism. The findings demonstrated that the supernatant Mg(OH)2 method successfully produced residue-free ATA foil with comparable disinfection performance, thus eliminating the need for a washing step and enhancing its suitability for point-of-use water treatment applications.
This research successfully developed a novel method for fabricating alkali-treated aluminum (ATA) foil using a supernatant Mg(OH)2 solution, effectively eliminating the residual powder commonly found in conventional production.The resulting residue-free ATA foil (ATA foil-2) demonstrated comparable disinfection performance to the traditionally produced foil (ATA foil-1) in removing E.These findings highlight the potential of this new fabrication method to improve the practicality and user-friendliness of ATA foil for point-of-use water disinfection, particularly in resource-limited settings.
Future research should focus on evaluating the performance of ATA foil in continuous flow systems to facilitate its implementation in real-world water treatment applications. Investigating the long-term stability and reusability of the ATA foil is crucial for ensuring its practical viability and cost-effectiveness. Furthermore, studies should explore the efficacy of ATA foil against a broader range of waterborne pathogens, including viruses and protozoa, to comprehensively assess its disinfection potential and expand its applicability. Considering the potential for aluminum or magnesium leaching, future studies should also assess the safety of the treated water by monitoring the concentration of these elements. Finally, field studies in communities lacking access to safe drinking water are needed to evaluate the real-world performance and impact of ATA foil on public health, providing valuable insights for scaling up its production and distribution.
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