KARAKTERISASI KADAR KALSIUM (Ca) PADA KAPUR DARI LIMBAH CANGKANG SIPUT MENARA (Turritella bacillum) (KAJIAN SUHU DAN WAKTU KALSINASI)

Abstract

This study aims to determine the process of making lime from tower snail shells (Turitella bacillum) with calcination method and to characterize calcium (Ca) using UV-Vis spectrophotometry. The making of lime from the tower snail shells (Turitella bacillum) by calcination method using a furnace is carried out with a temperature treatment of 700C, 800C, 900C with a time of 3 hours, 5 hours, 7 hours. Lime produced from the calcination process is carried out using a UV-Vis spectrophotometer. The results of lime analysis from the tower snail shell using UV-Vis spectrophotometer produced a standard curve y = 0.0465x + 0.1073 with r2 = 0.9851. Calcination temperature of 700 o C for 3 hours, 5 hours and 7 hours = 0.043 ppm, 4,026 ppm, 6,176 ppm; calcination temperature of 800 o C for 3 hours, 5 hours and 7 hours = 0.531 ppm, 4.402 ppm, 6.983 ppm; calcination temperature of 900 o C for 3 hours, 5 hours and 7 hours = 0.854 ppm, 4.66 ppm, 6.983 ppm.