Study of the Utilization of Heavy Metal Biosorption (Cr, Co, Cu, Fe, Cu, Mn, Ni) with Chitosan from Crab and Kupang Shell Waste

¹ Department of Chemistry Education, Faculty of Teacher Training and Education Raja Ali Haji Maritime University, Dompak, Tanjungpinang, Indonesia
² Department of Biology Education, Faculty of Teacher Training and Education Raja Ali Haji Maritime University, Dompak, Tanjungpinang, Indonesia

^* Corresponding author: hilfipardi@umrah.ac.id

Abstract

Pollution is defined as the entry of an object, substance or energy into the aquatic environment that has a negative impact on living things. This study aims to determine the adsorbent absorption of crab shell ash and kupang ash to the levels of heavy metal chromium (Cr), CrChromium (Cr), Cadmium (Cd), Cobalt (Co), Iron (Fe), Copper (Cu), Manganese (Mn) and Nickel (Ni) in standard solution. Shell ash is made by calcination using a furnace at 900 ° C for ± 9 hours. The standard solution was added to the shell then stirred and allowed to stand for 8 hours. and for metal analysis using a Serum Spectrophotometer. metal analysis using Atomic Absorption Spectrophotomer. From the results of the study, it was found that the absorption capacity of crab and kupang ash on Fe and Cu metals reached 100%. The absorption capacity of the three metals on Co, Mn and Ni is not too different with values above 99%. Shell ash was able to absorb Cr more than the other compared to other shell ashes with a value of 99.91%.