Removal of manganese (II) in water samples by the aeration-filtration process and determination based on 5-Br-PADAP ligand by cathodic s tripping voltammetry

In this s tudy, manganese (Mn II) was determined in aqueous media by an electrochemical method, and its removal was evaluated using the aeration-filtration process (AFP). An electrochemical sensor based on carbon pas te (EPC) modified with the 5-Br-PADAP ligand was used to measure Mn (II) in aqueous media. Through the optimization of analytical parameters in cathodic s tripping voltammetry (CSV), real boreholes and well water samples could be analyzed for manganese content. The optimum parameters such as preconcentration potential (1100 mV), preconcentration time (240s), 5-Br-PADAP ligand concentration (20 μmol L-1), and electrode rotation speed during pre-concentration (1000 rpm) were s tudied and optimized. The detection limit (LOD) is es timated at 3 ×10-7 mol L-1 with a relative s tandard deviation (RSD) of 3.36%. The real samples showed that some water points have more concentration than the s tandard. A simple, effective, inexpensive, and rural-friendly method was used for treating manganese-rich water. Following the aeration phase, the sand and gravel column was filtered toremove manganese (II) from the water. The removal efficiency of Mn was obtained at a rate of 74.8- 84.5% and more than 95% after two hours of aeration and 1 hour at pH 8 for real samples.