Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment)
Ni ketut sari
Department of Chemical Engineering, Universitas Pembangunan Nasional “Veteran” Jawa Timur, Surabaya 60294, Indonesia.
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education Energy Environmental Science

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Synthesis of Hydroxyapatite from Snail Shells Using the Precipitation Method rahel aditya amara putri; moh rifqi maulana; erwan adi saputro; caecillia pujiastuti; Ni ketut sari
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 10 No. 2 (2026)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v10i2.1014

Abstract

Hydroxyapatite (HA) is a bioceramic widely used in biomedical applications due to its excellent biocompatibility and bioactivity. This study aims to synthesise hydroxyapatite from rice field snail shells (Pila ampullacea) using the precipitation method and to evaluate the effects of phosphoric acid (H?PO?) concentration and heating time on the synthesised hydroxyapatite's characteristics. The synthesis was conducted by varying H?PO? concentration from 0.25 to 2 M and heating time from 1 to 3 hours at a calcination temperature of 800°C. The resulting hydroxyapatite was characterized by SEM-EDX, XRF, XRD, and FTIR analyses, and the Ca/P ratio was optimized using Response Surface Methodology (RSM). SEM-EDX analysis revealed porous and agglomerated surface morphology, indicating successful thermal decomposition of calcium carbonate into calcium oxide                precursor. XRF results showed that increasing H?PO? concentration and heating time significantly reduced the Ca/P ratio toward the stoichiometric value of                hydroxyapatite (1.67), with optimum conditions achieved at 1.5–2 M H?PO? and         2–2.5 hours heating time. XRD analysis confirmed the formation of crystalline              hydroxyapatite with an average crystal size of 14.62 nm and crystallinity degree of 81.23%. FTIR spectra identified characteristic phosphate functional groups,           confirming hydroxyapatite formation. The RSM optimization demonstrated that both H?PO? concentration and heating time significantly influence the Ca/P ratio. These findings indicate that rice field snail shells have strong potential as a                 sustainable and cost-effective alternative calcium source for hydroxyapatite synthesis in biomaterial applications. Contribution to Sustainable Development Goals (SDGs):SDG 3: Good Health and Well-BeingSDG 9: Industry, Innovation, and InfrastructureSDG 12: Responsible Consumption and Production
Study of the Delignification Process of Green Algae (Chlorophyceae) for ?-Cellulose Production Sulis Safaatin Hidayah; Shafa Alika Wulandari; Sintha Soraya Santi; Ketut Sumada; Ni Ketut Sari
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 10 No. 2 (2026)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v10i2.1129

Abstract

Green algae (Chlorophyceae) are a lignocellulosic biomass with considerable potential as a source of ?-cellulose due to their relatively high cellulose content. This study aimed to produce ?-cellulose via alkaline delignification and to investigate the effects of NaOH concentration and delignification time on the resulting product's characteristics. The delignification process was carried out using NaOH concentrations ranging from 6% to 14% and delignification times of 30–90 min at 60°C. The resulting product were analyzed using the Chesson-Datta method and further characterized by FTIR and SEM analyses, while process optimization was performed using Response Surface Methodology (RSM). The results showed that the optimum conditions were achieved at an NaOH concentration of 8% and a delignification time of 45 min, yielding an ?-cellulose content of 51.2%, a hemicellulose content of 16.9%, and a lignin content of 5.4%. FTIR analysis confirmed the presence of functional groups characteristic of ?-cellulose, whereas SEM observations revealed morphological changes in the fiber surface, which became rougher and more porous due to the removal of lignin and hemicellulose. RSM optimization predicted optimum conditions yielding 51.234% ?-cellulose, 12.990% hemicellulose, and 4.963% lignin. Contribution to Sustainable Development Goals (SDGs): SDG 9: Industry, Innovation, and InfrastructureSDG 12: Responsible Consumption and ProductionSDG 13: Climate ActionSDG 14: Life Below WaterSDG 15: Life on Land
Co-Authors caecillia pujiastuti erwan adi saputro Ketut Sumada moh rifqi maulana rahel aditya amara putri Shafa Alika Wulandari Sintha Soraya Santi Sulis Safaatin Hidayah