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All Journal Jurnal Cakrawala Ilmiah AHKAM : Jurnal Hukum Islam dan Humaniora
Waridatul Hasanah
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Humanities Economics, Econometrics & Finance Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Public Health Social Sciences Other

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PENGARUH PENAMBAHAN KEROSENE DAN NATRIUM TRIPOLYPHOSPHATE TERHADAP %RECOVERY BITUMEN ASBUTON Rucita Ramadhana; Zakijah Irfin; Tasya Nabila Maulida; Waridatul Hasanah
Jurnal Cakrawala Ilmiah Vol. 3 No. 7: Maret 2024
Publisher : Bajang Institute

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Abstract

Aspal alam yang banyak terdapat di Pulau Buton Sulawesi Tenggara biasa dikenal sebagai Asbuton diketahui memiliki deposit yang besar sehingga dapat dimanfaatkan sebagai bahan alternatif pengganti aspal minyak. Kandungan bitumen yang terdapat dalam asbuton dapat dipisahkan dengan menggunakan metode ekstraksi. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi Natrium Tripolyphosphate (Na5P3O10) sebagai sealing agent, temperatur proses, dan jumlah kerosene terhadap %recovery bitumen dari asbuton. Tahapan pemisahan bitumen asbuton terdiri dari beberapa tahapan yaitu size reduction dari asbuton, penentuan kadar bitumen awal, proses ekstraksi menggunakan kerosene dengan durasi pengadukan selama 30 menit pada kecepatan 1000 rpm, penambahan sealing agent, pemisahan tiga fase, dan pengujian kadar bitumen yang diperoleh. Pada tahapan pemisahan bitumen ini terdapat variasi rasio kerosene:asbuton sebesar 40:60, 50:50, dan 60:40 (%w/w), konsentrasi sealing agent sebesar 0,5; 0,375; dan 0,25 (%w/w), serta temperatur proses pada 50 – 90oC. Berdasarkan penelitian yang telah dilakukan, diperoleh %recovery tertinggi sebesar 37,07%, diperoleh pada rasio asbuton:kerosene sebesar 50:50, konsentrasi Na3P5O10 sebesar 0,25%, dan suhu proses sebesar 70oC. Dengan adanya penelitian ini diharapkan dapat mendukung pengembangan produksi bitumen dalam skala industri.
Persepsi Penghulu tentang Syarat Adil Saksi dan Implementasinya dalam Akad Nikah di KUA Kota Bukittinggi Waridatul Hasanah; Adlan Sanur Tarihoran
AHKAM Vol 5 No 4 (2026): AHKAM: Jurnal Hukum Islam dan Humaniora
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ahkam.v5i4.11483

Abstract

The status of witnesses in a marriage contract plays an important role in Islamic law, but the application of the requirement of moral probity for witnesses in service practices at the Offices of Religious Affairs (KUA) continues to face challenges, particularly in determining its indicators and assessment mechanisms. This study aims to analyze the perceptions of Islamic marriage registrars (penghulu) regarding the requirement of moral probity for witnesses and its implementation in the solemnization of marriage contracts at KUA offices throughout Bukittinggi City. The study employed a qualitative approach with a field research design. Data were collected through observation, interviews with Islamic marriage registrars, documentation, and a literature review and were subsequently analyzed through the stages of data collection, cleaning, organization, presentation, interpretation, and verification. The findings indicate that Islamic marriage registrars no longer interpret the concept of moral probity normatively and strictly as formulated in classical Islamic jurisprudence but assess it based on outward conditions, social reputation, and the principle of husnuzan. The implementation of the requirement of moral probity for witnesses tends to be administrative and social in nature, without an in-depth verification of the witnesses’ morality. The assessment focuses more on fulfilling formal requirements, including being Muslim, having reached puberty, being of sound mind, possessing clear identification, and being able to participate in the marriage contract process. These findings indicate a transformation in the interpretation of witness probity from a normative-theological concept toward a practical, administrative, and contextual approach. This study emphasizes the need for more detailed guidelines or standard operating procedures to standardize assessments of witness eligibility without disregarding service accessibility and the objectives of Islamic law.
Co-Authors Rucita Ramadhana Tarihoran, Adlan Sanur Tasya Nabila Maulida Zakijah Irfin