Background: Solutions to challenges of access to potable water have been the focus of many studies around the world, which also is one of the goals of sustainable development.
Objective: This study attempts to address this issue wherein we tested the efficiency of blended coagulants in removing pollutants from surface water. Previous studies have reported and suggested the requirement of blended coagulants that are tailor-made for treating geographically specific water samples since single coagulants will not be effective in removing all pollutants.
Methods: Three coagulants, two natural and one chemical, were blended for the present study in various ratios. Turbidity removal of the bi and tri-blend coagulants of water samples with initial turbidity of 70 and 150NTU was above 95% - 100%.
Results: Removal of Physico-chemical parameters by blended coagulants in surface waters was up to 48% for electrical conductivity, 80% for total solids, 36% for hardness, 40% for alkalinity and 57% for chlorides. The results are supported with analysis from SEM images showing adsorbed floc on to coagulant and FTIR spectra presenting the functional groups responsible for coagulation.
Conclusion: Hence, it can be concluded that the natural coagulants tested in the present study are promising solutions for the challenges of water quality.