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All Journal Al-Kimia J-ESA (Jurnal Ekonomi Syariah) Advance Sustainable Science, Engineering and Technology (ASSET)
kahar, kaharuddin
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Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Industrial & Manufacturing Engineering

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KAFALAH AND RAHN: CONCEPTUAL ANALYSIS AND IMPLEMENTATION IN CONTEMPORARY SHARIA FINANCING kahar, kaharuddin; Shaganta, Fitri; Nufzatutsaniah, Nufzatutsaniah
J-ESA (Jurnal Ekonomi Syariah) Vol 7 No 2 (2024): Desember
Publisher : Program Studi Ekonomi Syariah IAI Muhammadiyah Bima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52266/jesa.v7i2.3476

Abstract

This study aims to analyze the concept, implementation, and effectiveness of sharia guarantee instruments, namely kafalah and rahn, in the context of contemporary sharia financing. The method used is a literature study with an interpretive-critical approach to examine classical and contemporary sources. The results show that although kafalah and rahn have a strong theoretical foundation, their implementation in Islamic financial institutions faces significant challenges, such as the gap between theory and practice, the need for innovation in the context of globalization and financial technology, and alignment with sharia maqashid. This research highlights the importance of regulatory harmonization, the development of inclusive operational mechanisms, and adaptation to modern technology to increase the effectiveness and compliance of sharia in the sharia financing system. The results are expected to be a significant contribution to the development of a more just, inclusive, and sustainable Islamic economy.
ADSORPSI KALSIUM AIR PAYAU SEBAGAI SUMBER AIR BERSIH BAGI MASYARAKAT PESISIR DENGAN SILIKA TERMODIFIKASI DARI ABU SEKAM PADI Kahar, Kaharuddin; Edihar, Muh; Harimu, La; Dahlan; Mutmainnah
Al-Kimia Vol 13 No 1 (2025): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

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Abstract

Many Indonesian residents have difficulty obtaining clean water, especially people who live in coastal areas. Those who live there can only consume brackish water which is considered to have side effects on health due to the excessive calcium content. This research offers a simple method, namely adsorption using abundant raw materials, namely rice husk ash from agricultural waste resulting from burning rice husks. Using husks directly has less effectiveness, so it needs to go through additional processes such as removing impurities and modifying the structure. This research aims to reduce calcium levels in brackish water using silica that has been modified from rice husk ash. The process of making adsorbents is carried out by sieving, heating, filtering, washing to obtain silica, then modifying and optimizing important parameters until its application to brackish water. The difference between pre-modified and modified silica can be seen in the characterization with FTRI at wave numbers from 470 cm-1 to 430 cm-1 1, namely deeper bending vibrations, which are also clarified by the surface condition with more structured pores seen in the SEM results. The modified silica works optimally at a mass of 0.4 grams, pH 7.5, contact time of 40 minutes and concentration of 50 ppm. It has an adsorption capacity of 3.2 mg/g and follows the Langmuir isotherm pattern.
Synthesis and Characterization Materials Modern (CMC-Fe3O4-Chitosan-TiO2) As Portable Adsorbent Toxic Metal (Hg) and Dye Substance (Rh B) Kahar, Kaharuddin; Edihar, Muh; Suhardin
Advance Sustainable Science Engineering and Technology Vol. 6 No. 3 (2024): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v6i3.709

Abstract

The synthesis of the portable adsorbent material CMC-Fe3O4-Chitosan-TiO2 begins by inserting the CMC-Chitosan mixture into the leaching solution. Next, concentrated NaOH and 3% CaCl2 were added, then decanted and dried at room temperature. After that, the composite was coated with TiO2 and then dried in an oven at a temperature below 100 oC. The success of the synthesis was indicated by the presence of specific absorption in FT-IR. 3429 cm-1 hydroxyl group, 2926 cm-1 for the CH/CH3 group, 1631 cm-1 for the carbonyl group (C=O), 1642 cm-1 which is the CH/CH3 group, as well as ) and ( at 400-600 cm-1. In addition, the different surface morphology of the material formed from its basic components is based on SEM characterization sails. Adsorption test results for Hg (II) metal ions were 53% while dyes were 38% with a time of 40 minutes. This research is good for handling watermaster
Co-Authors Dahlan La Harimu Muh. Edihar Mutmainnah Nufzatut saniah Shaganta, Fitri Suhardin