EXTRACT OF MANGOSTEEN PEEL (Garcinia mangostana L.) AS CALCIUM CARBONATE SCALE INHIBITOR

Abstract

In this research, it has been conducted the participation of mangosteen peel (Garcinia mangostana L.) extract in the calcium carbonate (CaCO3) growth solution to a green inhibitor of CaCO3 scale establishment utilizing unseeded technique at various concentrations of calcium carbonate 0.075, 0.100, and 0.125 M and concentration ranges of inhibitor added were around 0, 50, 150, and 250 ppm. Analysis of functional groups contained in mangosteen peel extract was performed by infrared (IR) spectrophotometer. The result shows that the extract of mangosteen peel may be applied as a green inhibitor to block CaCO3 scale formation with the highest Inhibitor Effectivity Percent (IEP) in blocking the CaCO3 deposit formation of 95.68% at the condition of calcium carbonate growth solution of 0.100 M and the mangosteen peel extract concentration added of 250 ppm. The results based on a qualitative analysis using Scanning Electron Microscope (SEM) showed that calcium carbonate size without the addition of inhibitors is bigger than the addition of inhibitors.