Article Per Year (5 Year)
p-Index From 2021 - 2026
1.512
P-Index
This Author published in this journals
All Journal Sorption Studies
Rahmat Basuki
Department of Chemistry, The Republic of Indonesia Defense University, Kawasan IPSC Sentul, Bogor 16810, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology

Published : 10 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 10 Documents
Search

 1 
Adsorption Ni(II) on Magnetic Fulvic Acid-Chitosan: Kinetics and Isotherm Study Raihansyah Raja Hutama; Audrey Nur Aisyah; Azzahra Sandri; Mayang Fauziah Putri Kuntjahjono; Sultan Napoleon; Yusuf Bramastya Apriliyanto; Nugroho Adi Sasongko; Rahmat Basuki
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.
Radar Absorber Composite Graphene Oxide/Magnetite/Zinc Oxide in Polypyrole Matrix Allodya Nadra Xaviera; Vania Agatha Nareswari; Dea Dwi Ananda; Hazzha Azzahra; Thessa Ocatvia Joyetta Tarigan; Tiara Rizki Yulita; Nugroho Adi Sasongko; Rahmat Basuki
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.v1i1.80

Abstract

The development of stealth technology in modern defense systems demands superior radar absorbing material (RAM) innovation. This study aims to synthesize and characterize Fe₃O₄/ZnO modified carbon-based RAM composites in a polypyrrole (PPy) matrix using graphite oxide (GiO). The composites were synthesized via a modified Hummer method as well as a one-pot technique, and characterized using FTIR, XRD, SEM-EDX, and VNA. The FTIR characterization results showed that the C=C peak decreased in intensity after the oxidation process, indicating the breaking of the aromatic double bond and the formation of new functional groups such as C–O and C=O. This change was detected in both pGiO and kGiO samples. XRD data showed a shift in the main peaks to 2θ = 11.25° and 42.20° for pGiO and 2θ = 11.56° and 42.40° for GiO-k, respectively. This shift indicates the formation of a more amorphous graphite oxide structure compared to the original graphite.The results show that GiO/Fe₃O₄/ZnO has the highest reflection loss value of -9.20 dB at 10.91 GHz (GiO-p/Fe₃O₄/ZnO 66%-PPy) with an absorption value of 88.03% and rGO/Fe₃O₄/ZnO/PPy the highest RL value reached -7.51 dB at 11.57 GHz (rGO-k/Fe₃O₄/ZnO 66%-PPy) with an absorption value of 82.21%. This research proves that Fe3O4/ZnO modified carbon-based composites in a polypyrrole matrix have high potential as an efficient radar absorbing material and can support the needs of domestic defense technology.
Synthesis of Magnetite/Chitin/Fulvic Acid Derived from Goat Manure Compost and Adsorption Study of Zn(II) for Water Security Enhancement Audrey Nur Aisyah; Azzahra Sandri; Raihansyah Raja Hutama; Mayang Fauziah Putri Kuntjahjono; Sultan Napoleon; Rahmat Basuki
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.
Effect of Different Temperatures in Magnetite Synthesis on Methylene Blue Adsorption Dea Dwi Ananda; Sultan Napoleon; Thessa Octavia Joyetta Tarigan; Tiara Rizki Yulita; Latisa Stefi Alivia; Bagas Kusuma; M. Rizki Fajri; Kayla Sophia Putri; Nayantaka Virsa Artdero; Nurwanto; Rudi Hartono; Rahmat Basuki
Sorption Studies Vol. 1 No. 2 (2025): Sorption Studies, December 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v1i2.84

Abstract

This study aims to synthesize magnetite (Fe₃O₄) particles using the coprecipitation method, with variations in temperature (70°C and 90°C) and reaction system (open and closed) to evaluate their effects on product quality. Characterization was conducted using FTIR, XRD, and organoleptic observation to confirm the formation of Fe₃O₄. Additional tests included magnetic attraction measurements through mass response and adsorption capacity (Q) analysis using methylene blue. FTIR analysis showed absorption bands at 3417.00 cm⁻¹, 1627 cm⁻¹, 1404 cm⁻¹, and 578 cm⁻¹, indicating the presence of O–H, C=O, and Fe–O functional groups. XRD patterns revealed diffraction peaks at 2θ values of 30.27°, 35.23°, 43.22°, 53.71°, 57.43°, and 62.11°, confirming the spinel crystal structure of Fe₃O₄. The sample synthesized at 90°C under closed conditions exhibited a darker black color and higher mass yield, suggesting improved crystallinity and phase purity. The closed system also showed higher adsorption capacities of 0.0008 mmol·g⁻¹ at 70°C and 0.0018 mmol·g⁻¹ at 90°C, along with stronger magnetic response. The open system produced a black precipitate with lower yield and weaker magnetic response, suggesting oxidation of Fe²⁺ to Fe³⁺ due to direct contact with oxygen, leading to the formation of compounds such as hematite or maghemite with lower magnetic properties. These results confirm that higher reaction temperatures and closed conditions optimally enhance the quality and stability of magnetite.
Synthesis of Fe₃O₄ using the Co-precipitation Method with Temperature and Time Treatment as Methylene Blue Adsorbent Mayang Fauziah Putri Kuntjahjono; Aura Puja Lestari; Siti Nurhalimah; Wikrama Sarweswara; Farelino Oktavianus Purba; Andrew Miracle Kaunang; Nugroho Adi Sasongko; Rahmat Basuki
Sorption Studies Vol. 1 No. 2 (2025): Sorption Studies, December 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v1i2.94

Abstract

Magnetite nanoparticles (Fe₃O₄) possess unique magnetic properties and are widely applied in various fields such as biomedical technology, environmental remediation, and material separation. This study reports the synthesis of Fe₃O₄ using the co-precipitation method under varying conditions of temperature, reaction time, and atmospheric exposure (open vs. closed system). Ferric and ferrous salts were reacted with ammonium hydroxide under controlled heating at 70°C and 80°C for 60 minutes. The synthesized materials were evaluated through visual color inspection, qualitative magnetic response, yield efficiency, and magnetic load-bearing capacity. The results showed that a closed system at 80°C produced the most optimal Fe₃O₄, indicated by a deep black color, strong magnetic attraction (149.86 mN), and a yield of 92.5%. Comparatively, open systems led to partial oxidation of Fe², resulting in less magnetic phases like maghemite or hematite. The findings confirm that controlling synthesis parameters, especially atmospheric exposure and temperature, significantly influences the purity, particle uniformity, and magnetic strength of Fe₃O₄ nanoparticles, highlighting the importance of optimized synthesis for practical applications.
Modification of Calcium Oxide Catalyst Derived from Chicken Eggshell Waste with Magnesium Oxide to Enhance Biodiesel Synthesis from Crude Palm Oil Fikriyah Hamidah; Dewi Anggraini Septaningsih; Mirad Fahri; Rahmat Basuki; Gunaryo; Amadea Kenyoning Hapsari Subiakto; Ardine Kusuma Nismarawati; Hanifa Setya Ningrum; Zaydan Al Fajry; Maura Agnes Erwinda; Achmad Kusyairi Afandi
Sorption Studies Vol. 1 No. 2 (2025): Sorption Studies, December 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v1i2.115

Abstract

Biodiesel is a promising renewable energy source to replace conventional diesel fuel. This study aims to improve biodiesel production efficiency by utilizing a heterogeneous catalyst derived from chicken eggshell-based calcium oxide (CaO), modified with magnesium oxide (MgO). The catalyst was synthesized via co-precipitation and applied in both transesterification and interesterification reactions using crude palm oil (CPO) as feedstock. The optimum reaction was conducted at 65°C for 180 minutes with a 9:1 methyl acetate/methanol to oil molar ratio and 2.5 wt% catalyst loading. The modified CaO.MgO catalyst outperformed unmodified CaO, yielding 89.63% and 99.96% biodiesel via interesterification and transesterification, respectively. The catalyst characterization was performed using FTIR, XRD, and GC-MS, confirming the enhancement in basicity, crystallinity, and FAME content. This study demonstrates the potential of waste-derived catalysts in sustainable biodiesel production while addressing environmental waste issues.
Recent Advances in Nickel Ferrite-Polymer Nanocomposites for Radar Absorbing Material Applications Thesalonika Br Panjaitan; Alya Hijrianisa; Yusuf Bramastya Apriliyanto; Dea Dwi Ananda; Rahmat Basuki; Hotma Renta
Sorption Studies Vol. 1 No. 2 (2025): Sorption Studies, December 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v1i2.125

Abstract

Nickel ferrite (NiFe₂O₄) and its polymer-based composites have emerged as promising candidates for radar absorbing materials (RAMs) due to their unique combination of magnetic and dielectric loss mechanisms. This review highlights recent advances in synthesis strategies, including sol–gel, hydrothermal, co-precipitation, and microwave-assisted methods, which enable precise control of particle size, morphology, and crystallographic defects. Such control supports flexible structural design of nickel ferrite spinel structures, allowing dopant incorporation to tailor magnetic anisotropy and saturation magnetization. These structural features directly affect electromagnetic performance. Magnetic loss is mainly governed by natural resonance and, to a lesser extent, eddy current effects, while dielectric loss arises from dipole polarization, interfacial polarization, and conduction loss. The synergistic balance of magnetic and dielectric losses makes nickel ferrite–polymer nanocomposites promising broadband radar absorbing materials. The discussion emphasizes the role of cation substitution, polymer matrices, and hybridization with carbon-based materials in enhancing microwave absorption bandwidth and impedance matching. Various synthesis approaches, including sol–gel, hydrothermal, and in-situ polymerization, are compared with respect to their influence on particle size, morphology, and absorption efficiency. Challenges such as limited bandwidth, thermal and mechanical stability, and scalability are highlighted, along with potential solutions through advanced nanostructuring, multifunctional design, and sustainable synthesis. Future research directions are also outlined to support the development of next-generation stealth and electromagnetic interference shielding technologies.
Comparative Review of Metal Ferrites for Heavy Metals Adsorption in Water Mayang Fauziah Kuntjahjono; Sultan Napoleon; Wikrama Sarweswara; Yoselyn Evangelina Pandia; Zidni Aghna Haqina; Nugroho Adi Sasongko; Nuha Nuha; Akhmad Rifai; Rahmat Basuki
Sorption Studies Vol. 1 No. 2 (2025): Sorption Studies, December 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v1i2.132

Abstract

Heavy metal contamination in water is one of the most critical environmental issues, posing direct threats to human health and ecosystems. Various methods have been developed to address this problem; however, adsorption remains the most effective technique due to its simplicity, low cost, and regenerability. In this context, ferrite based materials (MFe2O4) offer great potential as heavy metal adsorbents owing to their combined advantages of magnetic properties, chemical stability, large surface area, and easy separation under an external magnetic field. This review paper provides a systematic comparison of various types of metal ferrites (Ni, Mn, Co, Zn, Mg, Cu, and Nd) applied for the removal of heavy metal ions from water. The comparison covers their crystal structures, morphology, surface area, magnetic properties, adsorption capacity, as well as the isotherm models and kinetics underlying the adsorption process. The findings show that each type of ferrite possesses specific advantages and limitations. NiFe2O4 exhibits high structural stability, MgFe2O4 demonstrates high adsorption capacity but is susceptible to dissolution under acidic conditions, CuFe2O4 exhibits strong chemical affinity, and NdFe2O4 shows potential selectivity toward specific ions. Meanwhile, MnFe2O4 and CoFe2O4, particularly in composite forms such as MnFe2O4/biochar and CoFe2O4/FAU, stand out with adsorption capacities exceeding 400 mg/g, sufficient magnetic properties, and easy magnetic separation, making them the most promising candidates for water treatment applications. This paper provides a comprehensive understanding of the structure property function relationship of metal ferrites as selective, stable, and efficient adsorbent materials for heavy metal remediation in aquatic environments.
Comparative Heavy Metal Adsorption Using Magnetic, Carbon-Based, and Biopolymer Composite: A Critical Systematic Review Sultan Napoleon; Mayang Fauziah Putri Kuntjahjono; Wikrama Sarweswara; Nugroho Adi Sasongko; Akhmad Rifa'i; Nuha Nuha; Rahmat Basuki
Sorption Studies Vol. 2 No. 1 (2026): Sorption Studies, Vol. 2 No. 1, June 2026
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v2i1.152

Abstract

The increasing contamination of aquatic environments by heavy metals has driven the continuous development of efficient, sustainable, and reusable adsorbent materials. This systematic review critically compares the adsorption performance of magnetic-, carbon-based-, and biopolymer-based composites used for heavy metal removal from aqueous solutions. The analysis integrates data from various studies published within the last decade, focusing on maximum adsorption capacity (qmax), specific surface area, magnetic properties, and adsorption isotherm models. Carbon-based adsorbents demonstrate high adsorption capacities (4.16–491 mg g⁻¹) due to their large surface areas and well-developed porosity, while biopolymer-based materials offer environmental sustainability and functional group diversity but generally exhibit lower adsorption performance unless modified with magnetic or carbon components. Magnetic adsorbents, particularly ferrite-based nanocomposites, exhibit exceptional adsorption capacities (up to 1951.98 mg g⁻¹ for Pb(II)) and high removal efficiencies exceeding 95%, with the added advantage of easy magnetic separation and recyclability. However, the long-term stability and regeneration efficiency of magnetic adsorbents remain critical challenges. The bibliometric analysis using VOSviewer further reveals that recent research trends are shifting from fundamental adsorption studies toward the development of multifunctional, hybrid composites that integrate magnetic, carbon, and biopolymer components. These advancements reflect a growing emphasis on enhancing adsorption efficiency, reusability, and environmental compatibility, providing a strong foundation for the design of next-generation adsorbents suitable for industrial-scale wastewater treatment.
Adsorption of Malachite Green using Coconut Shell–Graphite Oxide (CS-GiO): Kinetic and Isotherm Studies Hazzha Azzahra; Sultan Napoleon; Patricya Inggrid Wilhelmina Bolilanga; Rahmat Basuki; Gunaryo Gunaryo; Dea Dwi Ananda; Mayang Fauziah Putri Kuntjahjono; Robith Alzamzani; Nugroho Adi Sasongko; Akhmad Rifai; Nuha Nuha
Sorption Studies Vol. 2 No. 1 (2026): Sorption Studies, Vol. 2 No. 1, June 2026
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v2i1.160

Abstract

Malachite green (MG) is a toxic cationic dye commonly found in textile wastewater and poses serious environmental and health risks. In this study, coconut shell–derived graphene oxide (CS-GiO) was synthesized and evaluated as an adsorbent for the removal of MG from aqueous solutions. The material was prepared through carbonization of coconut shells followed by a modified Hummers method to oxidize coconut shell graphite (CS-Gi) into graphene oxide. Prior to oxidation, the carbonized material was purified using HF treatment. Structural characterization using FTIR confirmed the presence of oxygen-containing functional groups, indicating successful oxidation of CS-Gi into CS-GiO. Meanwhile, XRD analysis revealed the characteristic (002) diffraction plane and showed that CS-GiO exhibited lower crystallinity compared to CS-Gi due to the incorporation of oxygen functional groups that disrupted the original crystalline structure. Adsorption behavior was evaluated through isotherm and kinetic studies. The adsorption equilibrium was better described by the Langmuir isotherm model (R² = 0.9957) than the Freundlich model (R² = 0.9617), indicating monolayer adsorption on relatively homogeneous active sites. The maximum adsorption capacity (qm) was 35.95 mg g⁻¹, with a Langmuir constant (KL) of 37873.42 L mol⁻¹ and a separation factor (RL = 0.000995), confirming that the adsorption process is highly favorable. Kinetic analysis revealed that the adsorption follows the pseudo-second-order (PSO) model (R² = 0.99818), with a rate constant (k₂) of 813.63 g mol⁻¹ min⁻¹ and an equilibrium adsorption capacity of 0.000349 mol g⁻¹, suggesting a relatively rapid adsorption process. The adsorption mechanism is likely dominated by chemisorption, involving interactions between oxygen-containing functional groups on the CS-GiO surface and cationic MG molecules through electrostatic attraction, coordination interactions, and possible electron transfer. These findings demonstrate that CS-GiO derived from coconut shells is a promising adsorbent for the efficient removal of malachite green from aqueous systems.
Co-Authors Achmad Kusyairi Afandi Akhmad Rifa'i Akhmad Rifai Allodya Nadra Xaviera Alya Hijrianisa Amadea Kenyoning Hapsari Subiakto Andrew Miracle Kaunang Ardine Kusuma Nismarawati Audrey Nur Aisyah Aura Puja Lestari Azzahra Sandri Bagas Kusuma Dea Dwi Ananda Dewi Anggraini Septaningsih Farelino Oktavianus Purba Fikriyah Hamidah Gunaryo Gunaryo Gunaryo Hanifa Setya Ningrum Hazzha Azzahra Hotma Renta Kayla Sophia Putri Latisa Stefi Alivia M. Rizki Fajri Maura Agnes Erwinda Mayang Fauziah Kuntjahjono Mayang Fauziah Putri Kuntjahjono Mirad Fahri Nayantaka Virsa Artdero Nugroho Adi Sasongko Nugroho Adi Sasongko Nugroho Adi Sasongko Nugroho Adi Sasongko Nugroho Adi Sasongko Nugroho Adi Sasongko Nuha Nuha Nuha Nuha Nurwanto Patricya Inggrid Wilhelmina Bolilanga Raihansyah Raja Hutama Robith Alzamzani Rudi Hartono Siti Nurhalimah Sultan Napoleon Thesalonika Br Panjaitan Thessa Ocatvia Joyetta Tarigan Thessa Octavia Joyetta Tarigan Tiara Rizki Yulita Vania Agatha Nareswari Wikrama Sarweswara Yoselyn Evangelina Pandia Yusuf Bramastya Apriliyanto Zaydan Al Fajry Zidni Aghna Haqina