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All Journal VALENSI International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Riset Kimia Indonesian Journal of Chemistry Aceh International Journal of Science and Technology International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Kimia Unand
Upita Septiani
Departemen Kimia, FMIPA, Universitas Andalas, Padang-Sumatera Barat
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology

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Journal : Indonesian Journal of Chemistry

 1 
Synthesis of Hydroxyapatite-Polyethylene Glycol with In-Situ Method Using Calcium Oxide from Blood Shells (Anadara granosa) Novesar Jamarun; Nabiila Ayyu Trycahyani; Syukri Arief; Upita Septiani; Vivi Sisca
Indonesian Journal of Chemistry Vol 23, No 3 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.78538

Abstract

Hydroxyapatite (Ca10(PO4)6(OH)2, HAp) is a calcium phosphate-based biomaterial that is widely used in bone implants due to its similarity in composition with the constituent elements of bone. However, HAp still has poor mechanical properties, so research was carried out to improve the mechanical properties such as reduced brittleness, less fracture resistance, and a denser structure of HAp by synthesizing composites with PEG. This study used PEG as a filler and HAp as a matrix. HAp was synthesized from blood clam shells (Anadara granosa) using the sol-gel method. HAp-PEG composite was synthesized using the in-situ method with various HAp concentrations of 40, 50, 60, 70, and 80%. FTIR characterization showed the presence of functional groups PO43− and CO23−, which indicated the presence of HAp. Analysis of the XRD pattern showed a crystal size of 24.194 nm. SEM-EDX showed the needle-shaped HAp-PEG composite HAp crystal morphology and obtained a Ca/P ratio of 1.87. Analysis of DTA results showed a weight loss of 65.72% in the composite at a temperature > 200 °C. A degradation test was also carried out to see the percentage of the HAp-PEG composite to be degraded, and the optimum degraded composite with increasing days had a concentration of 70%.
Effect of Sodium Citrate and Urea as Additive on the Synthesis of Hydroxyapatite from Blood Cockle Shells: Kinetics and Adsorption Isotherms Study of Coomassie Brilliant Blue Putri, Dhea Rahmanda; Jamarun, Novesar; Septiani, Upita; Sisca, Vivi
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.102465

Abstract

Hydroxyapatite (HAp) was synthesized from blood cockle shell waste by the sol-gel method, incorporating sodium citrate and urea as additives for Coomassie brilliant blue (CBB) adsorption. The synthesis included HAp without additives (HAp 1) and with 30 g/L of urea and varying sodium citrate concentrations of 0 (HAp 2), 0.1 (HAp 3), 0.2 (HAp 4), 0.3 (HAp 5), 0.4 (HAp 6), and 0.5 (HAp 7) g/L. HAp 4 showed the highest adsorption capacity at 96.60 mg/g. FTIR analysis of HAp 4 revealed adsorption bands for O−H and PO43− groups. XRD analysis indicated a crystal size of 24.55 nm with low crystallinity. SEM-EDS analysis showed a Ca/P ratio of 1.28, with an irregular shape due to agglomeration and an average particle size of 1.16 µm. SAA analysis found a surface area of 107.18 m2/g, a pore size of 12.55 nm, and a pore volume of 0.36 cm3/g. HAp 4 followed the Langmuir and pseudo-second-order isotherm models in CBB adsorption and demonstrated five-time reusability, proving it to be an effective adsorbent for CBB dyes.
Co-Authors -, Rahmayeni . Syukri Aju Deska Amir, Firmanul Qadri Fadhil Ferdian Fatiha, Widya Yuliani Fiska Julian Tasari Gustiana, Mega Hamdi, Hayatul Hermansyah, Tommy Hitoshi Kubota Hitoshi Kubota, Hitoshi Ida Ayu Putu Sri Widnyani Ilona Bella Kevin Septioga Lestari Ningsih Lisma, Agrina Mahmud, Marsal Mai Efdi Mai Efdi Mega Gustiana Mia Yeliandri Mirawati Mirawati Mirawati Mirawati Nabiila Ayyu Trycahyani Novesar Jamarun Putri, Dhea Rahmanda Reza Audina Putri Reza Audina Putri Riri Trinanda Safni Safni Safni Silvi Veronita Sisca, Vivi Solly Aryza Sugeng, Santoso Syukri Syukri Arief Syukri Syukri Syukri Syukri Tasari, Fiska Julian Veronita, Silvi Vivi Sisca Wellia, Diana Vanda Widya Yuliani Fatiha Yetria Rilda Yuli Okta Fitriyani Yulia Eka Putri Zilfa Zilfa Zulhadjri Zulhadjri