The Influence of Calcination Temperature to Calcium Content in the Mangrove Crab Shells (Scylla serrata) from Merauke

Abstract

This study introduced the use of shells of the Merauke Mangrove crabs as a natural source of calcium extracted through thermal decomposition process with various temperatures. The method adopted in this study was carried out in two stages; first, shells of the crabs that have been cleansed and dried under the sun for 24 hours, were mashed and then it divided into two parts. The first section was used for the analysis of calcium composition. While the second part was calcined at three different temperatures, 900°C, 1000°C and 1100°C for 5 hours before analysis. The results of the XRF showed that the raw powder of mangrove crab shell was contained 90.46% of calcium and 9.64% of other mineral content. This study revealed that the temperature of 1000°C is the right calcination condition to produce high calcium minerals in the mangrove crab shell, in which it reached 97.76% purity. The phase form that obtained from the XRD before being calcined was CaCO3 and after the calcination process was Ca(OH)2/CaO hydration. This study also found that the calcined process has succeeded to decrease the carbon content in the shells. Therefore, it can be concluded that the mangrove crab shells from Merauke, possess basic materials as bioceramic.

Highly ordered CaO from cuttlefish bone calcination for the efficient adsorption of methylene blue from water

“…Calcium-based materials are mostly synthesized from chicken eggshell waste ( Witoon, 2011 ; Mohamed et al, 2021 ), shrimp shells ( Gedda et al, 2015 ), and other marine molluscan shell waste ( Anand et al, 2021 ; Vijai Anand et al, 2021 ). Calcination is a high-temperature, chemical-free breakdown method for converting marine-sourced CaCO 3 into CaO ( Haryati et al, 2021 ). Calcination temperature is the key factor in the process and generally depends on the nature of CaCO 3 or other compounds presented before calcination ( Tlili et al, 2021 ).…”

Calcined waste shells as a promising, eco‐friendly adsorbent, antimicrobial, food preservative, and food packaging material: A mini review

“…Calcination is a high-temperature breakdown process performed below the melting point of shells without reagent addition to change the shape and composition of shells (Haryati et al, 2021). Calcined shell powder is generated through washing, drying, calcining, and sieving of raw waste seashells.…”