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All Journal KOVALEN: Jurnal Riset Kimia JITIPARI (Jurnal Ilmiah Teknologi dan Industri Pangan UNISRI)
Azzahra, Fadlia
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

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Pemanfaatan Limbah Karbon-Aktif Melalui Reaktivitasi Termal Sebagai Adsorben Ion Kadmiun pada Lindi TPA: Utilization of Activated Carbon Waste Through Thermal Reactivity as a Cadmium Ion Adsorbent in Landfill Leachate Sardi, Bambang; Afrilya, Anggie Putry; Andriani, Sitti Maghfirah; Novika, Try; Azzahra, Fadlia; Hidayat, Wahyu
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 2 (2024): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i2.17169

Abstract

The leachate produced at the Kawatuna landfill, managed without proper waste treatment systems, has been found to contain heavy metals like cadmium (Cd), which contaminate groundwater and pose significant health risks. This study investigates the reduction of Cd ions in leachate through adsorption using activated carbon (AC) waste. The AC waste was reactivated via thermal methods, including phosphoric acid immersion, heating, and washing. Morphological analysis was conducted using scanning electron microscopy (SEM), and adsorption efficacy was evaluated with atomic absorption spectroscopy (AAS). The findings indicate that AC waste with a pore diameter of 2.95 µm can be effectively reused as an adsorbent through thermal reactivation. Specifically, AC treated with H3PO4 immersion and heating exhibited a pore diameter of 3.24 µm, while heating and washing resulted in a pore diameter of 2.29 µm. The Cd concentration in leachate treated with AC immersed in H3PO4 followed by heating showed a modest reduction, whereas the heating and washing treatment led to a significant decrease in Cd levels, achieving an adsorption capacity of 3.92 mg/L within 50 min. This method presents a viable alternative for managing landfill leachate at the Kawatuna site.
Characterization of soy tofu substituted with palm kernel meal (Elaeis guineensis jacq): Karakterisasi Tahu Kedelai Tersubstitusi Bungkil Inti Sawit (Elaeis guineensis jacq) Lutfi, Mohammad; Azzahra, Fadlia; Pomuruh, Felix Kristianto; Manggau, Gemaliany Pilo; Syamsuddin, Syamsuddin; Amar, Aini Auliana; Rahmadina, Hizra Nur
JITIPARI Vol 10 No 2 (2025): JITIPARI
Publisher : Universitas Slamet Riyadi Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33061/jitipari.v10i2.11710

Abstract

Tofu is a common food made from soybeans. However, because soybeans have limitations in terms of availability, other alternative ingredients such as palm kernel meal (BIS) are needed. The purpose of this study was to determine the best concentration of palm kernel meal added to tofu making so as to reduce dependence on the use of soybeans. The study was designed using a completely randomized design with 1 factorial, namely the concentration of BIS and soybeans. The concentration variations used were: A1 (control, 100% soybean), A2 (25% BIS: 75% soybean), A3 (50% BIS: 50% soybean), and A4 (75% BIS: 25% soybean). The parameters tested were BIS crude fiber, proximate analysis and tofu organoleptic. The results showed that BIS after fermentation experienced a decrease in crude fiber from 27.25 to 18.375%. Based on the proximate analysis, the variation of 75% BIS: 25% soybean is the best concentration with the highest protein content of 45.14%. Likewise, the moisture, ash, fat and carbohydrate content obtained were 79.05; 1.00; 6.20; and 0.96%. The organoleptic showed the level of panelists' liking for color, aroma, texture and taste with the value of panelists' liking level respectively 3.11; 4.09; 3.6 and 3.96 which indicates that this product can be accepted by the community.
Co-Authors Afrilya, Anggie Putry Aini Auliana Amar Andriani, Sitti Maghfirah Bambang Sardi Manggau, Gemaliany Pilo Mohammad Lutfi Novika, Try Pomuruh, Felix Kristianto Rahmadina, Hizra Nur Syamsuddin Syamsuddin Wahyu Hidayat