Magnesium removal from brine water with low lithium grade using limestone, rembang, indonesia

Abstract

Experiments have been carried out to remove magnesium ions from brine water using limestone, Rembang, Indonesia. The aim of the study was to produce brine water concentrates that were rich in lithium and did not contain magnesium elements. Brine water used has the following chemical composition: 74.67 ppm Li; 877.891 ppm Na; 1549.81 ppm K; 147.23 ppm Mg; 38.49 ppm Ca and others. The initial stages were 200 g of natural lime calcined at 900 °C for 3 hours using a furnace as a precipitation agent. It is then added to 1000 ml of brine water with a variation of 0.336 g, 1 g, 10 g, 20 g, 30 g, 40 g, 50 g by stirring for 3 hours at atmospheric pressure. The results showed that the magnesium removal from brine water began to be seen in the addition of roasted limestone of 1 g with the dominant phase as Mg0.03Ca0.97CO3 in the precipitated residue. On the addition of 10 g and 20 g of roasted limestone into brine water, the percentage of magnesium removal was almost maximum of 98.8% and 99.8% with the precipitated residues as Mg(OH)2 phases. This experiment was successful to remove magnesium from brine water so that the lithium concentration of brine water increased to 104.32 ppm Li and 105.86 ppm Li with the addition of roasted limestone of 10 g and 20 g, respectively. These results indicate that the use of roasted limestone to eliminate magnesium from brine water with low lithium grade is recommended.

Synthesis of Food Grade Salt From Brine Water of Tirta Sanita Bogor

“…Based on the research of Lalasari et al, (2019), the content of Brine water of Tirta Sanita Bogor contained Ca, Mg, Li and Na components with concentration of 384.866, 147.227, 746.748 and 877.891 ppm respectively. According to (Aprilianti & Gustiawati, 2016) study, the content of brine, Na has had range from 25.000 to 100.000 ppm, Mg and Ca was about 57.000 and 75.000 ppm respectively.…”

“…Brine water of Tirta Sanita Bogor contained high concentrations of NaCl nevertheless, still contained Ca and Mg of 38.48 and 146.02 ppm respectively (Lalasari et al, 2019). This is the reason why Tirta Sanita Bogor brine water has potency to produce industrial salt with food grade quality.…”