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All Journal Jurnal Rekayasa Material, Manufaktur & Energi Sorption Studies
Hutama, Raihansyah Raja
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology

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Pemanfaatan Jamur Tiram Putih (Pleurotus Ostreatus) Sebagai Biomaterial Konstruksi Militer Ramah Lingkungan Aritonang, Sovian; C Lubis, Astrid Blandina; Ramadhanty, Chrisna Prawiradhiva; Hamidah, Fikriyah; Hutama, Raihansyah Raja
Rekayasa Material, Manufaktur dan Energi Vol 7, No 1: Januari 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i1.17289

Abstract

Developments in the 21st century require the development of technology, one of which is construction material technology. The construction material generally used is conventional concrete on the market. However, in its use, conventional concrete is not environmentally friendly. Therefore, biomaterials were developed from the use of white oyster mushrooms with various media. This study of biomaterials develops mycelium using three types of media, namely rice husk waste, corn stalk waste and wood dust waste. The aim of this research is to obtain optimal media for the growth of white oyster mushrooms. The cellulose content of corn stalks, rice husks, and sawdust were 33%, 38%, and 41%, respectively. The research results showed that sawdust waste media was the best medium as a fungal growth medium. Wood dust waste with a cellulose content of 41% can produce the growth of mold as high as 8.62 cm. In rice husk waste media with a cellulose content of 38%, 5.62 cm was obtained. Then, on corn stalk waste media with a cellulose content of 33%, fungal growth was obtained as high as 0.632 cm
Adsorption Ni(II) on Magnetic Fulvic Acid-Chitosan: Kinetics and Isotherm Study Hutama, Raihansyah Raja; Aisyah, Audrey Nur; Sandri, Azzahra; Kuntjahjono, Mayang Fauziah Putri; Napoleon, Sultan; Apriliyanto, Yusuf Bramastya; Sasongko, Nugroho Adi; Basuki, Rahmat
Sorption Studies Vol. 1 No. 1 (2025): Sorption Studies, Vol. 1 No. 1 June 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v1i1.79

Abstract

Indonesia, as one of the most populous countries in the world, requires clean water sources. Industrial waste that is improperly discharged pollutes water bodies with hazardous metals. Adsorption is one of the effective methods for reducing the concentration of harmful metals in water. This study utilized fulvic acid extracted from goat manure compost and combined it with chitosan and magnetite as an adsorbent material for Ni(II). The FTIR results for the magnetite-fulvic acid-chitosan composite showed a peak at 1627 cm⁻¹, indicating the presence of aromatic C=C, aromatic ring -OH, and quinone C=O groups, which confirm the binding of fulvic acid. BET analysis was performed on magnetite and magnetite-fulvic acid-chitosan, and the pore volume and pore size were found to be 0.177488 cm³/g and 6.5394 nm, respectively. The composite exhibited magnetic behavior due to the attraction between the magnetite-fulvic acid-chitosan and an external magnet. Adsorption tests using isotherm and kinetic models revealed that Ni(II) adsorption followed a multilayer mechanism and pseudo-second-order kinetics, with a b value of 121.68 mg/g and an experimental qe of 6.28 × 10⁻⁵ mol/g. This shows that the magnetite-fulvic acid-chitosan composite is a promising, sustainable, and magnetically separable adsorbent for the effective removal of nickel ions from contaminated water.
Synthesis of Magnetite/Chitin/Fulvic Acid Derived from Goat Manure Compost and Adsorption Study of Zn(II) for Water Security Enhancement Aisyah, Audrey Nur; Sandri, Azzahra; Hutama, Raihansyah Raja; Kuntjahjono, Mayang Fauziah Putri; Napoleon, Sultan; Basuki, Rahmat
Sorption Studies Vol. 1 No. 1 (2025): Sorption Studies, Vol. 1 No. 1 June 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v1i1.82

Abstract

Water pollution due to heavy metals such as Zn(II) poses a risk to the environment and health. This study aims to synthesize Magnetite/Chitin/Fulvic Acid (AF)-based composite adsorbent from goat feces compost and evaluate its effectiveness in adsorbing Zn(II) ions. Fulvic acid was extracted through alkaline-acid method and synthesized together with chitin and magnetite using one pot coprecipitation method. Characterization using FTIR, XRD, and BET showed successful synthesis with mesoporous structure for BET (average pore size 6.15 nm, surface area 41.77 m²/g). Isotherm studies showed that the adsorption of Zn(II) showed a good fit with the Freundlich (R² = 0.9967) and Temkin (R² = 0.9968) models, indicating multilayer adsorption on the heterogeneous surface. The composite also shows good adsorption ability and can be magnetically separated, making it an environmentally friendly and efficient potential adsorbent for wastewater treatment applications.
Co-Authors Aisyah, Audrey Nur Aritonang, Sovian C Lubis, Astrid Blandina Hamidah, Fikriyah Kuntjahjono, Mayang Fauziah Putri Napoleon, Sultan Nugroho Sasongko Jati, Nugroho Sasongko Rahmat Basuki Ramadhanty, Chrisna Prawiradhiva Sandri, Azzahra Yusuf Bramastya Apriliyanto