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Sorption Studies
Published by Indonesian Scholar Society
ISSN : -     EISSN : 31235697     DOI : https://doi.org/10.55749/ss
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology
Sorption Studies (Sorpt. Stud.) is a peer-reviewed, open-access journal devoted to elucidating the fundamental aspects of chemistry and physics occurring at a wide range of adsorption and absorption and to disseminating this knowledge fast. The journal welcomes a broad spectrum of topics, including but not limited to: all aspects of adsorption-desorption; absorption phenomena, including superabsorbent material and radar absorption material; nanoscale science and engineering, including manipulation of matter at the atomic/molecular scale and assembly phenomena; reactivity of surfaces as related to various applied areas including heterogeneous catalysis, chemistry at electrified interfaces, and semiconductor functionalization; surface reactivity for environmental protection and pollution remediation; interactions at surfaces of soft matter, including polymers and biomaterials.
Arjuna Subject : Kimia(semua kategori) - Kimia Teori dan Fisik
Articles 15 Documents
 1   2 
Recent Advances in Neodymium as a Magnetic Nanoparticle Material Candidate for Microwave Absorption Dea Dwi Ananda; Thessa Octavia Joyetta Tarigan; Tiara Rizki Yulita; Kayla Sophia Putri; Hazzha Azzahra; Sultan Napoleon; Mayang Fauziah Putri Kuntjahjono; Almanda Naura Candra Putri; Muhammad Afif Aji Patria; Yusuf Bramastya Apriliyanto; Rahmat Basuki; 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.v2i1.145

Abstract

Magnets are materials that can attract or repel other objects due to the magnetic field generated by the arrangement of electron spin moments in atoms. One important magnetic material is magnetite (Fe₃O₄), which has been widely used and continues to be developed to meet the needs of modern technology. Innovation in material development is achieved through ion-substitution strategies, such as the use of the trivalent metal neodymium to replace Fe³⁺ in the ferrite structure. This strategy allows regulation of the microstructure and ion distribution in the crystal lattice, thereby significantly influencing the material's magnetic performance. Neodymium nanoparticles are known to exhibit superparamagnetic properties due to their tiny dimensions, so that each particle behaves as a single magnetic domain. These particles possess significant magnetic moments; however, their magnetization disappears once the external magnetic field is removed due to thermal fluctuations. The magnetic behavior of neodymium-based nanoparticles is strongly influenced by particle size, crystal structure, composition, and synthesis conditions. Based on theoretical calculations, neodymium exhibits a high magnetic moment due to its unpaired 4f electrons and strong spin–orbit coupling, with a magnetic spin moment of approximately 2.85 × 10⁻²² JT⁻¹. The characteristics of 4f electrons that are localized and protected by the outer shell produce strong spin-orbit coupling, contributing to a significant total magnetic moment and high crystal magnetic anisotropy. This phenomenon strongly aligns the magnetization along specific crystallographic directions, thereby stabilizing the magnetic orientation. This unique property makes neodymium a potential candidate for high-performance magnetic materials, including in high-frequency electromagnetic wave absorption technology. Nd-based magnetic materials exhibit enhanced microwave absorption performance through improved dielectric/magnetic losses and impedance matching, achieving reflection loss values below −40 dB with broad absorption bandwidths for electromagnetic shielding and radar absorbing applications.
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.
Stealth Revolution: Advancing Equipment Performance with Nano Metal-Oxide Radar Absorbing Materials Riyanti Putri; Thessa Octavia Joyetta Tarigan; Tiara Rizki Yulita; Nurwanto; Rudi Hartono; Fatkhul Zuhdi
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.v2i1.156

Abstract

Over the years, microwave-absorbing materials have attracted major interest because of their critical roles in stealth, communication, and information-processing technologies. Advances in nanomaterial functionalization enable tailored dielectric and magnetic properties, with absorption governed by dielectric loss, magnetic loss, and their coupling. The article expounds on measurement principles, encompassing essential analyses, performance assessments, and prevalent interaction pathways like Debye relaxation. Notably, it showcases advancements and evaluates performance in microwave absorption using metal-oxide nanomaterials. This work provides an introduction to the basic principles of microwave absorption and summarizes recent progress in improving the absorption performance of various nanometal oxides.
Effectiveness Comparison of Activated Carbon/MnO₂ Composite and Mg(OH)₂-Impregnated Activated Carbon as Adsorbents for Uranium Removal from Nuclear Waste : A Review Artanti Sekarini; Dita Cinta Toharani; Robith Alzamzami; Zidni Aghna Haqina; Hotma Renta
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.v2i1.157

Abstract

Uranium contamination in nuclear wastewater poses significant environmental and health risks due to its radiotoxicity and persistence, necessitating the development of efficient adsorbent materials for its removal. This article discusses the effectiveness of two types of adsorbents: Activated Carbon/MnO2 Composite and Mg(OH)2-Impregnated Activated Carbon, in removing uranium from nuclear waste. Activated carbon/MnO2 composites exhibit high surface area and oxidative properties, enhancing uranium adsorption. In this study, Adsorption isotherm and kinetic analyses revealed that the composite achieved a maximum adsorption capacity of 65.5%, following the Langmuir model and pseudo-second-order kinetics. Meanwhile, Mg(OH)2-Impregnated Activated Carbon enhances the electrostatic interaction between adsorbents and uranium ions, thanks to its alkaline properties that favor the formation of chemical bonds. The maximum adsorption capacity of the predicted Mg(OH)2 reached 85 mg/g, with behavior that was also in accordance with the Langmuir isothermal model. Although both adsorbents show significant potential, the comparison shows that the choice between the two depends on the specific application conditions. The results of this research are expected to contribute to the development of more effective and sustainable nuclear waste management methods, as well as encourage innovation in water purification technology to overcome uranium contamination.
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.

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