Efficacy of Hibiscus Cannabinus L. (kenaf) Crude Seed Powder and its Methanol Extract in Water Purification

Abstract

The efficiencies of hibiscus cannabinus (kenaf) powder and methanol extract were studied in water purification. Two turbidity levels namely, high (160NTU) and low (49NTU) were considered. The water samples were taken from an open pond used for irrigation farming in Custom area of Maiduguri, Nigeria. In this study, the powdered cannabinus was discovered to be more effective in removing high turbidity water, with an efficiency of 96.0% against the extract with 85.6%. However, in low turbidity water, the methanol extract performed better, with a turbidity removal efficiency of 89.4% compared to 84.4%, if the cannabinus powder is used. Another parameter studied was the pH of the water which remains unaffected after the treatment at 7.0. The outcome of the performance of this natural coagulant and alum when compared indicated that alum also performed better on high turbidity water than low turbid water with a removal efficiency of 98.8% and 95.7% respectively. Alum slightly affected the pH of the water from original value of 7.0 to 5.5, which makes the water more acidic after treatment. It appears that natural coagulants of plant origin remain the best option engineers are left with, if the current emphasis on millennium development goal on clean water supply for all is to be achieved.

Keywords: , Cannabinus, Coagulation, Water Purification