#TITLE_ALTERNATIVE#

• Main Author: LARASATI, AMANDA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/25446
• Institution: Institut Teknologi Bandung

<p align="justify">Phosphate ions are usually considered as the responsible for the algal bloom in receiving water bodies and aesthetic problems in water. From the environmental point of view, management of such contaminant and valuable resource is very important. One method that can be used to remove orthophosphate is the adsorption method. An experimental study on the adsorption or phosphate onto cost effective adsorbents is presented. Cost effective adsorbents named Dago soil, Arcamanik soil, and dolomite. The effect of particle size, soil : solution ratio, and solution pH were examined. As a result, it was found that the highest efficiency of phosphate removal is at acidic pH, higher soil : solution ration and in smallest particle size. The orthophosphate removal efficiency by Dago soil, Arcamanik soil, and dolomite respectively are 65,641%-99,334%, 55,540%-99,12%, and 50,240%-91,489%. <br /> <br /> <br /> The desorption ability of Dago soil, Arcamanik soil, and dolomite respectively are 0,32% - 2,46%, 1,02% - 5,337%, and 4,36% - 15,703%. Adsorptions of orthophosphate by both soils occur according to the Temkin isotherm model, and for dolomite, the Freundlich isotherm depicted the equilibrium data most accurately. For all adsorbents were well fitted with pseudo-second order kinetics model. The Experimental data further indicated that the removal of orthophosphate by Dago and Arcamanik soil occur by chemisorptions mechanism, while adsorption orthophosphate by dolomite occur by physicsorption mechanism and surface precipitation.<p align="justify">