Konversi Koral Laut Menjadi Hidroksiapatit Dengan Metode Sonikasi

Yessy Warastuti, Basril Abbas, Nani Suryani

Abstract


Sintesis coralline hydroxyapatite (CHAp) dari koral laut yang umumnya menggunakan metode basah yaitu hidrotermal yang memerlukan suhu dan tekanan tinggi. Tujuan dari penelitian ini adalah mengkonversi koral laut Goniopora sp. menjadi CHAp dengan metode sonikasi pada suhu rendah. Goniopora sp. dikalsinasi pada suhu 900 °C selama  3 jam, kemudian direaksikan dengan diammonium hidrogen fosfat [(NH4)2HPO4] dan mono kalium fosfat (KH2PO4) dengan waktu sonikasi 6 jam sampai 24 jam pada suhu 60 °C. Hasil penelitian menunjukkan bahwa telah terjadi perubahan fase dari koral menjadi CHAp yang dapat dilihat dari identifikasi pola difraksi sinar-X khas dari hidroksiapatit dengan derajat kristalinitas sebesar 66% untuk CHAp dengan waktu sonikasi 24 jam. Spektrum Fourier Transform Infra Red Spectroscopy (FTIR) menunjukkan puncak serapan khas dari hidroksiapatit yaitu gugus OH pada 3637 cm-1 sampai dengan 3404 cm-1 fosfat (PO43-) pada 569 cm-1, 603 cm-1, 960 cm-1, dan 1045 cm-1 serta karbonat (CO32-) pada 1456 cm-1 dan 873 cm-1. Carbonated hydroxyapatite yang terbentuk adalah tipe-B. Rasio Ca/P yang dihasilkan untuk CHAp dengan waktu sonikasi 24 jam adalah 1,7.


Keywords


Koral; Goniopora; Hidroksiapatit; Coralline hydroxyapatite; Sonikasi

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DOI: http://dx.doi.org/10.24817/jkk.v39i2.3012

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