The world has a pressing need for accessible and affordable water treatment solutions, particularly in underserved areas like Kabingo, Uganda, the community that Miami University’s Engineers Without Borders works with. The primary objective of our work was to create sustainable filtration systems capable of effectively removing manganese (Mn) from drinking water sources. This area of study is important due to the widespread presence of Mn in natural water reservoirs and the associated health risks posed by its ingestion. To achieve this goal, we synthesized adsorbents using widely-available and sustainable materials, including banana peels, eggshells, and wood ash. Techniques such as thermal gravimetric analysis (TGA) and BET surface area assessments were instrumental in determining synthesis procedures and predicting the adsorption capacity of the materials. The effectiveness of these adsorbents for the removal of Mn was determined experimentally by evaluating their adsorption isotherms and adsorption kinetics. A colorimetric method and a spectrophotometer were used to analyze Mn in water for these experiments. This study showed that the adsorbents were effective in removing Mn from water. Some materials, like egg shells and wood ash, raised the pH of the water to greater than 10, which may have helped to precipitate Mn out from the water. The carbon-based adsorbents likely adsorbed the Mn from the water. Moving forward, we plan to create a POU device for Mn removal, as well as analyzing further investigating experimental parameters on the effectiveness of our adsorbent materials. Experimental parameters that will be investigated further include: pH, the presence of other minerals in water, and temperature. This experience has not only enriched our problem-solving skills and knowledge in water treatment but has also emphasized the importance of collaboration in addressing environmental challenges. As we pursue our careers in environmental engineering and water/wastewater treatment, this hands-on experience equips us with the tools needed to make meaningful contributions to sustainable water management practices and public health initiatives.
Author(s): Sydney Hoffman, Nathan Lindeman, Clayton Hensley
Advisor(s): Catherine Almquist, Chemical, Paper, and Biomedical Engineering
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