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All Journal Jurnal Kesehatan Masyarakat Mulawarman (JKMM) Makara Journal of Science
Ekananda, Rizki
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Environmental Science Health Professions Public Health

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Natural Aluminosilicate-based Y Zeolite for Catalytic Cracking of n-Hexadecane Khatrin, Irena; Saragi, Indah Revita; Ekananda, Rizki; Hanna, John Vincent; Griffith, Benyamin E; Krisnandi, Yuni Krisyuningsih
Makara Journal of Science Vol. 24, No. 2
Publisher : UI Scholars Hub

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Abstract

Natural zeolite and kaolin are abundant in Indonesia especially in Java and Belitung islands. These materials generally contain high aluminosilicate minerals that can be used as silica and alumina sources for the formation of NaY zeolite. This research aimed to identify the modification of NaY zeolite structure using Bayat natural zeolite as alumina source and Belitung kaolin as silica source and its catalytic activity for n-hexadecane cracking. Pretreatment of materials were performed in several steps: activation, purification, fragmentation for Bayat–Klaten natural zeolite, and silica extraction for Belitung kaolin. The synthesis of NaY was performed hydrothermally using seed-assisted method with crystallization times of 24 and 48 h. The surface area analysis showed a typical surface area of microporous zeolite (i.e., a pore diameter of 1.897 nm) and surface area of 309.4 cm2/g. Meanwhile, powder X-ray diffraction characterization showed that the as-synthesized materials have the structure of NaY zeolite. The optimum crystallization time was 24 h with Si/Al ratio of 4.10. Furthermore, both synthetic and natural sourced NaY zeolites were converted into HY zeolites and employed as cracking catalyst of n-hexadecane in a fixed-bed reactor at 500 °C for 75 s. The natural sourced HY resulted in 59.80% conversion and 59.80% yield of gasoline product (C9–C12). These values were lower than the results given by synthetic HY (80%).
Hubungan Pemberian ASI Eksklusif dengan Kejadian Stunting pada Balita di Provinsi X Safitri, Diah; Prasetyo, Sabarinah; Ekananda, Rizki; Waloya, Waloya
Jurnal Kesehatan Masyarakat Mulawarman (JKMM) Vol.5 No.1 Juli (2023) : Jurnal Kesehatan Masyarakat Mulawarman (JKMM)
Publisher : Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkmm.v5i1.10355

Abstract

Stunting adalah gangguan tumbuh kembang anak yang ditandai dengan tubuh pendek. Prevalensi stunting tahun 2018 di Indonesia mencapai 30,8%. Terdapat berbagai faktor risiko yang diduga menjadi penyebab utama stunting, salah satunya pemberian ASI Eksklusif. Penelitian ini bertujuan untuk mengetahui hubungan pemberian ASI Eksklusif terhadap kejadian stunting pada balita di Provinsi X dan memberikan gambaran prevalensi balita yang mengalami stunting serta proporsi bayi yang mendapat ASI Eksklusif pada setiap kabupaten di Provinsi X. Desain studi pada penelitian ini adalah studi ekologi dengan unit analisis agregat. Data yang digunakan merupakan data sekunder, yaitu data Gizi KIA Indonesia (kumulatif bulan September 2022). Terdapat enam kabupaten/kota yang digunakan sebagai sampel pada penelitian ini. Uji statistik yang digunakan adalah uji korelasi. Hasil penelitian ini menunjukkan lima dari enam kabupaten di Provinsi X memiliki proporsi balita yang mengalami stunting cukup tinggi serta proporsi bayi yang mendapat ASI Eksklusif rendah. Kemudian, tidak ada hubungan antara pemberian ASI Eksklusif dengan kejadian stunting, yaitu (p-value=0,402). Perlu adanya penelitian lebih lanjut yang meneliti faktor risiko stunting selain pemberian ASI Eksklusif.
Co-Authors Diah Safitri Griffith, Benyamin E Hanna, John Vincent Khatrin, Irena Sabarinah Prasetyo Saragi, Indah Revita Waloya, Waloya Yuni Krisyuningsih Krisnandi, Yuni Krisyuningsih