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All Journal Indonesian Physical Review Al-Khidmah Jurnal Pengabdian Masyarakat
Nafisah, Azmia Rizka
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Religion Humanities Decision Sciences, Operations Research & Management Education Languange, Linguistic, Communication & Media Physics Social Sciences

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SYNTHESIS OF SINGLE-PHASE HYDROXYAPATITE POWDER FROM EGGSHELL WASTE VIA CO-PRECIPITATION METHOD AND ITS STRUCTURAL CHARACTERIZATION Musyarofah, Musyarofah; Mahera, Adinda Kholif; Tajalla, Gusti Umindya Nur; Nafisah, Azmia Rizka; Prayitno, Budi; Norhidayah, Siti; Kartika, Siska Ayu
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.451

Abstract

This study aims to synthesize a single-phase hydroxyapatite powder using waste chicken eggshells as a calcium source via the co-precipitation method. The process focuses on optimizing calcination time and temperature to achieve high-purity hydroxyapatite.  The co-precipitation procedure involved controlled pH adjustment and aging time, contributing to the formation of homogeneous particles. Chicken eggshells, predominantly composed of calcium carbonate (CaCO3), were calcined at 1000°C for 15 hours to produce calcium oxide (CaO). The resulting CaO was then reacted with phosphate ions in an aqueous solution, followed by a calcination at 900°C for varying holding times of 5 and 10 hours. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and Brunauer-Emmett-Teller (BET) analysis were conducted to evaluate phase composition, crystal size, and texture properties. The optimum condition was found at 900 °C for 10 h calcination, resulting in single-phase hydroxyapatite, a crystallite size of 220 nm, an average pore radius of 6.78 nm, a total pore volume of 0.02 cc/g, a surface area of 6.38 m2/g, and an average particle radius of 213.89 nm. These findings highlight the potential of this method for producing bioceramics with desirable properties for use in bone grafts and other biomedical materials.
Pengembangan Alat Penyiraman Otomatis untuk Budidaya Jamur di Kelurahan Karang Joang Balikpapan Nafisah, Azmia Rizka; Vantoni, Rama; Melawati, Vivin; Adiwidya W, Bintang; Nur Ihsan, Riki; Setyo Budi, Eko; Subiantoro, Mechelle; Asfar, Andi; Marhamah, Mega
Al-Khidmah Jurnal Pengabdian Masyarakat Vol. 5 No. 2 (2025): MEI-AGUSTUS
Publisher : Institute for Research and Community Service (LPPM) of the Islamic University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56013/jak.v5i2.4406

Abstract

Masyarakat kawasan Giri Rejo memiliki latar belakang pekerjaan yang berbeda. Saat ini Masyarakat mulai mengembangkan budidaya jamur sebagai mata pencaharian tambahan. Dari hasil wawancara yang dilakukan dengan pelaku usaha, terdapat beberapa kendala yang mereka hadapi yaitu mengenai mekanisme penyiraman jamur tiram. Sumber air untuk proses penyiraman pada lokasi budidaya jamur cukup jauh. Sehingga membutuhkan waktu dan tenaga yang banyak untuk melakukan proses ini tiap harinya. Masyarakat saat ini masih menggunakan metode manual dengan sistem penyiraman menggunakan sprayer sederhana.Kegiatan ini merupakan rangkaian dari Kuliah Kerja Nyara (KKN) mahasiswa yang bertujuan untuk mengimplementasikan teknologi pada kehidupan bermasyarakat untuk meningkatkan efesiensi dan efektivitasi usaha kecil dan mikro. Alat penyiraman otomatis ini menjadi salah satu solusi yang diharapkan bisa membantu petani sekitar untuk mengembangkan budidaya jamur tiramnya.
THE EFFECT OF CALCINATION TEMPERATURE AND HOLDING TIME ON STRUCTURAL PROPERTIES OF CALCIA POWDERS DERIVED FROM EGGSHELL WASTE Prayitno, Budi; Musyarofah, Musyarofah; Tajalla, Gusti Umindya Nur; Nafisah, Azmia Rizka; Norhidayah, Siti; Kartika, Siska Ayu
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.450

Abstract

This study investigates the effects of calcination temperature and holding time on the structural properties of calcia (CaO) powders. The raw material used in this study is chicken eggshell waste, which was cleaned, dried, ground, and sieved for uniform particle size. The synthesis of calcia powder was performed by calcining the powder at 900°C and 1000 °C for 5, 10, and 15 hours. XRD, BET, and SEM analyses were employed to evaluate crystal structure, textural properties, and microstructure of the calcined powders. The Rietveld analysis reveals the identified crystalline phases were calcia up to 95.6 mol% and calcium hydroxide as secondary phase. Results indicate that higher calcination temperatures and extended holding times increase particle size and reduce BET surface area, significantly altering pore size distribution. Specifically, elevated temperatures promote sintering and grain growth, leading to smaller average pore radii and decreased total pore volume. The BET surface area ranges from 7.431 m2/g to 1.772 m2/g for samples calcined at 900 °C and from 3.202 m²/g to 0.711 m²/g for samples calcined at 1000 °C. Correspondingly, the average particle radius increases from 183.51 nm to 769.55 nm at 900 °C and from 425.83 nm to 1918.10 nm at 1000 °C as the holding time extends. BJH analysis reveals that longer holding times broaden pore size distribution due to the merging of smaller pores.
Co-Authors Adiwidya W, Bintang Asfar, Andi Budi Prayitno Kartika, Siska Ayu Mahera, Adinda Kholif Marhamah, Mega Melawati, Vivin Musyarofah Musyarofah, Musyarofah Norhidayah, Siti Nur Ihsan, Riki Setyo Budi, Eko Subiantoro, Mechelle Tajalla, Gusti Umindya Nur Vantoni, Rama