Browsing by Author "Octavianty, Dhini"

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    Influence of The Calcination Temperature And Ratio Of Cao/Hno3 On The Synthesis Of Precipitated Calcium Carbonate From Cockle Shell (Anadara Granosa)
    (2016-04-22) Purba, Paul Destin; Octavianty, Dhini; Amri, Amun; Zultiniar; Yelmida
    The aim of this research is to synthesis the Precipitated Calcium Carbonate (PCC) from Anadara granosa cockle-sheell via carbonation method. The tested variables were the calcination temperatures (700oC, 800oC, and 900oC) and the ratios of between calcium oxide and nitric acid (14:300, 17:300, and 20:300 gr/m)l. The formed nitric calcium was then added by ammonia to pH 12 to start the synthesis of calcium hydroxide followed by flowing it with the carbon dioxide to form white precipitate (PCC). Based on the analysed, the best yield of PCC (84.88%) was obtained at calcination temperature of 900oC with the ratio of 14 gr:300 ml. The X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) characterizations revealed that the type of crystals formed was vaterit and the shape of crystals were round (sphere-like) with a relatively uniform in size, respectively.