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All Journal VALENSI Jurnal Ilmiah Widya Jurnal Riset Kimia CHEMPUBLISH JOURNAL Desimal: Jurnal Matematika Indonesian Journal of Chemistry CHEESA: Chemical Engineering Research Articles Pena Literasi Pharmacoscript Journal of Community Service and Empowerment Indonesian Journal of Chemical Studies (Indones. J. Chem. Stud.) JURNAL ECONOMINA Jurnal Karya Abdi Masyarakat Babakti : Journal of Community Engangement Kesejahteraan Bersama : Jurnal Pengabdian dan Keberlanjutan Masyarakat INTIFA: Journal of Education and Language Sorption Studies
Rahmat Basuki
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Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Engineering Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Public Health Social Sciences Other

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Journal : Sorption Studies

 1 
Kinetic Study of Mg(II) Adsorption on Activated Coal Bottom Ash Wijaya, Dwi Putra; Anwar, Chairil; Basuki, Rahmat; Napoleon, Sultan; Kuntjahjono, Mayang Fauziah Putri
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.v1i1.77

Abstract

The research of sadsorption of Mg(II) ions on coal bottom ash as adsorbent has been carried out. The research was conducted by activating the coal bottom ash using concentrated HCl. Characterization of activated coal bottom ash was done by using Fourier Transform Infra-Red (FTIR) spectroscopy and X-Ray Difraction (XRD) analysis. Parameters of metal adsorption examined in this study include the effect of pH, mass of adsorbent, and interaction time. The concentration of each metal ion remaining in the solution after adsorption and desorption was determined using atomic absorption spectrophotometer. The result showed that activated coal bottom ash has been carried out. The optimum conditions for Mg(II) adsorption using 0.3 g coal bottom ash are at pH 5 with 60 minute contact. The Adsorption kinetics follow Ho model pseudo-second order with the rate constant 0.6182 and 0.998 correlation coefficient. These results highlight the potential of activated coal bottom ash as a low-cost, effective adsorbent for water treatment applications.
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.
Radar Absorber Composite Graphene Oxide/Magnetite/Zinc Oxide in Polypyrole Matrix Xaviera, Allodya Nadra; Nareswari, Vania Agatha; Ananda, Dea Dwi; Azzahra, Hazzha; Tarigan, Thessa Ocatvia Joyetta; Yulita, Tiara Rizki; 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.v1i1.80

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 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.
Effect of Different Temperatures in Magnetite Synthesis on Methylene Blue Adsorption Ananda, Dea Dwi; Napoleon, Sultan; Tarigan, Thessa Octavia Joyetta; Yulita, Tiara Rizki; Alivia, Latisa Stefi; Kusuma, Bagas; Fajri, M. Rizki; Putri, Kayla Sophia; Artdero, Nayantaka Virsa; Nurwanto; Hartono, Rudi; 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 Kuntjahjono, Mayang Fauziah Putri; Lestari, Aura Puja; Nurhalimah, Siti; Sarweswara, Wikrama; Purba, Farelino Oktavianus; Kaunang, Andrew Miracle; Sasongko, Nugroho Adi; 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 Hamidah, Fikriyah; Septaningsih, Dewi Anggraini; Fahri, Mirad; Basuki, Rahmat; Gunaryo; Subiakto, Amadea Kenyoning Hapsari; Nismarawati, Ardine Kusuma; Ningrum, Hanifa Setya; Fajry, Zaydan Al; Erwinda, Maura Agnes; Afandi, Achmad Kusyairi
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 Panjaitan, Thesalonika Br; Hijrianisa, Alya; Apriliyanto, Yusuf Bramastya; Ananda, Dea Dwi; Basuki, Rahmat; Renta, Hotma
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 Kuntjahjono, Mayang Fauziah; Napoleon, Sultan; Sarweswara, Wikrama; Pandia, Yoselyn Evangelina; Haqina, Zidni Aghna; Sasongko, Nugroho Adi; Nuha, Nuha; Rifai, Akhmad; Basuki, Rahmat
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.
Co-Authors Abner Tonu Lema Aditiya Panji Satrio Afandi, Achmad Kusyairi Aisyah, Audrey Nur Akbar Berliansyah Putra Marhar Akhmad Rifai Alivia, Latisa Stefi Ananda, Dea Dwi Anggi Khairina H H ANGGI KHAIRINA HANUM HASIBUAN Anitasari, Reza Anselmus Boy Baunsele Arief Budi Santiko, Arief Budi ARIYANTI, DITA Artdero, Nayantaka Virsa Asmal May Aura Puja Lestari Azimatur Rahmi Azzahra, Hazzha Bayu Ishartono Bolilanga, Patricya Inggrid Wilhelmina Chairil Anwar Cherryna Putri Khoirunnisa Dewi Anggraini S Dwi Putra Wijaya Dwi Siswanta Elva Stiawan Erwinda, Maura Agnes Esti, Mumpuni Fahri, Mirad Fajri, M. Rizki Fajry, Zaydan Al Fidelis Nitti Gunaryo Gusmaini, Nurul Hamidah, Fikriyah Haqina, Zidni Aghna Hartono, Rudi Heriyanti Heriyanti, Heriyanti Hijrianisa, Alya Hikmah Hildegardis Missa Hutama, Raihansyah Raja Ihsan, Mahya Irunsah, Aslan Istiqomah, Tiara Kaunang, Andrew Miracle Kuntjahjono, Mayang Fauziah Kuntjahjono, Mayang Fauziah Putri Kurnia Krisna Hari Kurnia, Adi Kurniadi, Tedi Kusuma, Bagas Lazuardy, Ardyan Lenny Marlinda Lestari, Aura Puja M. Sulthon Nurharmansyah P Malikhah, Wukhoidatul Mayori, Ersha Mentari Zikri Anty Minandre Wiratama Mirad Fahri Moch. Rizki Fajri Muh. Darwis Naat, Johnson N. Napoleon, Sultan Nareswari, Vania Agatha Natalia Sari Pujiastuti Neolaka, Yantus A B Ngatijo Ngatijo Ngatijo Ngatijo Ngatijo Ningrum, Hanifa Setya Nismarawati, Ardine Kusuma Nugroho Sasongko Jati, Nugroho Sasongko Nuha, Nuha Nurrosyid, Naufan Nurul Gusmaini Nurwanto Pandia, Yoselyn Evangelina Panjaitan, Thesalonika Br Prajanti, Fina Dwi Prasojo, Agus Eko Prawira, Ajeng Arimby Setyaningsih Putri Yan Purba, Farelino Oktavianus Putra, M. Sulthon Nurharmansyah Putri, Kayla Sophia Putri, Riyanti Putri, Winda Arinda Rahayu Rahayu Rahmawati, Fani Rahmi Rosita Ratna, Djamil Renta, Hotma Restina Bemis Restina Bemis, Restina Rizal Aditiya Saputra Sabrina, Nina Safari, Ibnu Wahid Saifur Rohman Salim Hidayat Sandri, Azzahra Sarweswara, Wikrama Sekarini, Artanti Septaningsih, Dewi Septaningsih, Dewi Anggraini Siti Nurhalimah Subiakto, Amadea Kenyoning Hapsari Tarigan, Thessa Ocatvia Joyetta Tarigan, Thessa Octavia Joyetta Tedi Kurniadi Tiarani, Sekar Ilma Toharani, Dita Cinta Wiana, Regita Andriani Xaviera, Allodya Nadra Yasirly Maulayya Anjani Yonda Yulita, Tiara Rizki Yunita, Amalia Yusuf Bramastya Apriliyanto Zuriyati Zuriyati