Biosorption and sequestration by living plants provide an environmentally and economically favorable method for removing heavy metals from natural waters, on the other hand, groundwater would provide an alternative drinking water resource. The groundwater treatment is necessary for it to be safe to drink. The influence of contact duration and pH on the removal of heavy metals (Mn (II) and Fe (II)) contaminants from groundwater was studied in this study. The Isotherms were utilized to investigate their adsorption properties. The percent absorption of Mn (II) and Fe (III) ions by algae rose virtually in lockstep with contact duration, reaching 83.7% and 76.5% at 60 min for Mn (II) and Fe (III), respectively. Reduced acidity improves the percentage of heavy metal ions taken up by algae; at the maximum pH 5.5, manganese ions are removed 92.35% of the time, whereas iron ions are taken up 99.38% of the time. The Langmuir adsorption isotherm model is believed to be the best for modelling the monolayer chemisorption process on homogeneous adsorption sites on algae surfaces. Pseudo-first-order and pseudo-second-order kinetic models were tested with experimental data to better understand the kinetics of Fe (III) and Mn (II) removal by algae. The results showed that the adsorption of Fe (III) and Mn (II) ions onto algae followed pseudo-second-order kinetics rather than pseudo-first-order kinetics.