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 is an attempt to address this issue wherein we tested the efficiency of blended coagulants in removing
pollutants from surface water. Previous studies have reported, and suggested requirement of blended coagulants that
are tailor-made for treating geographically specific water samples since no single coagulants will be effective in removing
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% -
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
challenges of water quality.