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SANI SANI
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Journal : G-Tech : Jurnal Teknologi Terapan

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Synthesis of Aragonite Polymorphs from Five Types of Sea Shells by Carbonation Method Hadi, Prasetyo; Hidayah, Wahyu; Sani, Sani; Muljani, Srie
G-Tech: Jurnal Teknologi Terapan Vol 9 No 3 (2025): G-Tech, Vol. 9 No. 3 July 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/gtech.v9i3.6998

Abstract

Shell waste accumulates along the coastal areas of Surabaya and Sidoarjo, with various types of shells including blood shells, green shells, feather shells, kampak shells, and batik shells. Currently, the waste from these shells is not being utilized optimally. Marine shell waste contains more than 95% calcium carbonate (CaCO3), making it suitable for the production of aragonite crystals, which can serve as raw materials for applications such as bone regeneration, paper manufacturing, and as fillers in rubber and plastics. The objective of this research is to synthesize aragonite from five types of marine shells and to investigate the effect of carbonation temperature on the percentage of aragonite formation. The method employed for synthesizing aragonite crystals is carbonation. Initially, the CaCO3 derived from marine shells is calcined at 900°C to produce calcium oxide (CaO). This calcium oxide is then dissolved in hydrochloric acid (HCl) to form calcium chloride (CaCl2). Subsequently, sodium hydroxide (NaOH) is added to CaCl2, and carbon dioxide (CO2) gas is bubbled through the solution to precipitate CaCO3 along with by-products of NaCl and water. The variables examined include comparisons among five types of shells (blood shells, green shells, feather shells, kampak shells, and batik shells) at calcination temperatures of 30°C, 60°C, and 90°C. The best results were obtained from the synthesis using green shells, yielding an aragonite crystal polymorph percentage of 76.4% at a carbonation temperature of 90°C. Conversely, the smallest yield of aragonite crystal polymorph was observed with batik shells at 26.0%.
Co-Authors . Hamsiah abdillah, nabil zhillan Af'ida, Layyinatul Ainur Rofiq Aisyah, Aurela Naura Anisa Ety Purnamawati Aristio, Rivaldi Arke, Nadya Ramadhani Asbar Asbar, Asbar Astuti, Dwi Hery Desy Nuriyah Alifa Rusdiyana Devi, Santi Dwi Hery Astuti Febriana, Esra Firmansyah, Dandy Ghassani, Aldyth Gilang Ramadhan Hasanah, Rofidatul Hery Astuti, Dwi Hidayah, Wahyu Ira Rahmawati Irfan Johari Istiqomah, Umi Ary James Marudut Jatiningtyas, Noor Aini JOKO SUSENO KHAIRUL HUDA, KHAIRUL Kusnadi Mardani, Santika Putri Mardiansyah, Andri Martono Martono Maulana, Adithiajaya Ma’rifah, Zustah Damul Meidiani Pujahashita, Luh Eka Muhamad Dias, Muhamad Dias Muhammad Fathoni, Muhammad Murdiani, Agus M Muttaqin, Anfai Syifa Nana Dyah Siswati, Anwar Zain and Mohammad Nh. Salsabiela Novananda, Ajie Novawan, Angga Prabowo,, Nina Sari Prasetyo Hadi Pratama, Bayu Prima Pratama, Riqfi Aditya Puja, Dewi Puspitawati, Ika Nawang Rahmanda, Rizky Rahmawati, Novie Ramadhiyani, Tyesha Rohayati, Ati Sandi Romy, Achmad Safira, Resi Sagala, Maria Tania Agustia Sari, Dewa Ayu Made Dearwita Siti Helmyati SRIE MULJANI Srie Mulyani, Srie Sugiharto, Dede Lucky sulasti, Sulasti Suprianti, Lilik Suprihatin Suprihatin SUSENO, JOKO Syahrul Syahrul Tirta Sampelawang, Dirga Tjahjadinata, Ruddy Udin Rinaldi Widyaningsih, Atria Tiffany Wirayudha, Umar Wulandari, Pingky Fantika