Study of Softening Hard Water Using Pistacia Vera Shell As Adsorbent for Calcium And Magnesium Removal

In Indonesia, the use of ground water is increases. It contains minerals, especially calcium and magnesium, at high concentration. This causes problems such as the crust on household appliances and higher use of soap for washing. Shell of Pistacia vera l. were study as an adsorbent of Ca and Mg in the matrix artificial hard water. Pistacia v. shell were dried and crushed into powder form. A batch experiment with various parameters was used in this research. Optimum adsorption conditions is at pH 8 and the weight of Pistacia v. shell is 1.5 g. Adsorption capacity of Ca and Mg, respectively 2.41 and 2.19 mg/g. Based on the research results, it can be concluded that the Pistacia v. shell is a very potential as a biodegradable, easy and inexpensive bioadsorbent to adsorb Ca and Mg.