Study of Inhibiting Effect of natural products on Hard Growth Water, Valorization of lemon peel in the treatment of hard water

Abstract

Hard water forms compact and adherent deposit to the walls of pipes and industrial or domestic installations. Several studies have been done in order to reduce the adverse scaling consequences and to achieve effective softening, but most of inhibitors used are chemical compounds that have damaging effects on health and the environment. There for we have used in this work an under natural alimentary product as scaling inhibitor.

Our study focuses on softening hard water of Bounouara having a hardness of 58°F in the presence of lemon peel extracts as scaling inhibitor. The evaluation of scaling power of Bounouara water and inhibitory effect of lemon peel was performed by using two techniques: - scaling accelerated method to evaluate the scaling power of raw Bounouara water electrochemically in the presence of natural inhibitors (lemon peel) - Impedancemetric method to appreciate globally, using the high frequency resistance, the importance and adherence of calcium carbonate deposit. Chronoamperometric study shows that scaling time decreases by increasing of temperature. So hard water become more scale-forming in high temperatures. Application of the treatment on Bounouara water showed that total hardness inhibition requires addition of lemon peel of 0.5 g/L at 20°C and 1 g/L at 40°C.

Keywords: Scaling, natural inhibitor, chronoamperometry, impedancemetry.