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All Journal International Journal of Renewable Energy Development Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Journal of Degraded and Mining Lands Management The Journal of Pure and Applied Chemistry Research IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Biomedical Journal of Indonesia Science and Technology Indonesia Jurnal Penelitian Sains Indonesian Journal of Chemistry Communications in Science and Technology CHEESA: Chemical Engineering Research Articles Molekul: Jurnal Ilmiah Kimia Jurnal Gema Ngabdi Jurnal Abdi Insani Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences Jurnal Abdi Masyarakat Indonesia Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat SRIWIJAYA JOURNAL OF ENVIRONMENT Makara Journal of Science Jurnal Pepadu Jurnal Ruaya : Jurnal Penelitian dan Kajian Ilmu Perikanan dan Kelautan Aceh International Journal of Science and Technology Molekul: Jurnal Ilmiah Kimia Komunita: Jurnal Pengabdian dan Pemberdayaan Masyarakat Bulletin of Chemical Reaction Engineering & Catalysis
Poedji Loekitowati Hariani
Department Of Chemistry, Universitas Sriwijaya
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary

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Modification of SiO2 from Rice Husk with Polyvinyl Alcohol (PVA) as Adsorbent of Congo Red Dye Robert Sibarani; Abdullah Abdullah; Poedji Loekitowati Hariani
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 2 (2025): June 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v10.i2.117

Abstract

Rice husk is an agricultural waste abundant in silica (SiO₂). SiO2 extracted from rice husk has a porous structure, so it has the potential to be used as an adsorbent material. To increase the stability and effectiveness of the adsorption process, SiO2 was modified by adding Polyvinyl Alcohol (PVA) and used to removal Congo red dye. SiO₂ extraction was carried out through a calcination process at three different temperatures, namely 600, 700, and 800 °C. Morphological analysis and elemental composition using SEM-EDX showed the presence of a polymer layer on the surface of the material, which functions as a distribution medium for SiO₂ particles. In addition, an increase in carbon (C) content was detected after the addition of PVA, confirming the presence of PVA in the composite. The optimum conditions for the adsorption process of Congo red dye by SiO₂-PVA were obtained at pH 1, contact time 75 minutes, and solution concentration 75 mg/L. Experimental data showed that the Langmuir isotherm model was most suitable for describing adsorption behavior compared to the Freundlich model, with an adsorption capacity of 14.31 mg/g. These results indicate that SiO₂-PVA has the potential as an alternative adsorbent for the treatment of waste containing dyes.  
Synthesis, Characterization and Antibacterial Activity of Rice Husk Biochar/MnFe2O4 Nanocomposites Oka Yana Afrizki; Poedji Loekitowati Hariani; Nabila Aprianti
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 11, No 1 (2026): February 2026
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v11.i1.48

Abstract

The increasing contamination with microorganisms has driven the development of effective, environmentally friendly antibacterial materials. Biochar was used as a porous matrix to support the dispersion of MnFe₂O₄ particles and to enhance the material's surface area. This study aims to synthesize a rice husk–based biochar/MnFe₂O₄ composite and evaluate its structural and morphological characteristics, as well as antibacterial activity. The composite was synthesized by coprecipitation and characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy–Energy Dispersive X-ray Spectroscopy (SEM–EDX), and Fourier Transform Infrared Spectroscopy (FTIR). Antibacterial activity was evaluated using the disk diffusion method against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) at concentration variations of 1000–5000 mg/L. XRD results confirmed the formation of a spinel MnFe₂O₄ phase, as indicated high-intensity diffraction peaks   at 31.56° and 35.22° and the average crystallite size calculated using the Scherrer equation was approximately 27.1 nm, indicating the formation of nanocrystalline domains. SEM analysis revealed that MnFe₂O₄ nanoparticles were uniformly dispersed on the biochar surface, while EDX confirmed the presence of C, O, Mn, and Fe elements. FTIR analysis identified –OH, C=O, and C–O functional groups, along with characteristic Mn–O and Fe–O vibrations, confirming successful composite formation. Antibacterial activity increased with concentration, reaching a maximum inhibition zone of 7.2 mm against both E. coli and S. aureus at 5000 mg/L, indicating mild antibacterial performance. The composite exhibits eco-friendly characteristics due to its biomass-derived biochar matrix and offers magnetic separability, facilitating easy recovery and potential reuse for sustainable environmental applications.Keywords: Rice husk biochar, MnFe₂O₄, antibacterial activity
Synthesis of Ag/CeO2 Nanocomposites with Noni Leaf Extract and Its Potential Antibacterial Properties Laellia Denada; Poedji Loekitowati Hariani; Nabila Aprianti
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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Abstract

This study aims to perform green synthesis of Ag/CeO2 nanocomposites using noni leaf extract and to test their potential antibacterial activity. The synthesis results were characterised using X-ray Diffraction (XRD) to determine crystallite size, Scanning Electron Microscope-Energy Dispersive Spectroscopy (SEM-EDX) to observe morphology and elemental composition, and Fourier Transform Infrared Spectroscopy (FTIR) to identify functional groups. The XRD characterization results showed the formation of typical Ag/CeO2 peaks with an average crystallite size of 15,28 nm. SEM analysis revealed morphology in the form of aggregates with varying sizes. EDX results confirmed the presence of Ag, Ce, and O elements. FTIR analysis showed the presence of typical Ce–O group absorption bands, which supports the successful synthesis of Ag/CeO2. The synthesized nanocomposites were then tested for their antibacterial activity against Escherichia coli and Staphylococcus aureus bacteria. Antibacterial activity tests showed the formation of an 8 mm zone of inhibition (ZOI) at a concentration of 5000 ppm, demonstrating the potential of the synthesized green Ag/CeO2 as an antibacterial agent. This study confirms that the use of noni leaf extract as a reducing and stabilizing agent is an environmentally friendly approach and has potential for environmental applications.
Modification of Activated Carbon from Palm Kernel Shells with Fe₃O₄ Magnetic for Water Treatment of Enim River Damayanti Damayanti; Susila Arita; Poedji Loekitowati Hariani
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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Abstract

The economical, easy-to-implement, and regenerative treatment methods are essential to obtain clean water. In this study, activated carbon was synthesized from palm kernel shells using ZnCl₂ as an activator. The activated carbon was then modified with Fe₃O₄. The resulting activated carbon and activated carbon-Fe₃O₄ product were characterized using XRD, SEM-EDX, VSM, and BET surface area analysis. Furthermore, activated carbon-Fe3O4 was applied to reduce Fe ions, turbidity, and total suspended solids (TSS) and increase the pH value in Enim river water. The resulting activated carbon has met SNI standards, with a moisture content of 8.81%, ash content of 5.475%, and an iodine adsorption capacity of 1763.86 mg/L. The synthesized activated carbon-Fe₃O₄ exhibits strong magnetic properties, with a saturation magnetization value of 68.82 emu/g and a surface area of 355.42 m²/g. Optimal conditions for the treatment of Enim river water were obtained at an adsorbent dose of 40 mg/L, a stirring rate of 120 rpm, and a stirring time of 120 minutes. Under these conditions, the Fe ion reduction efficiency reached 96.95%, turbidity 89.83%, and TSS 80.74%, while the pH increased from 6.23 to 6.74. FTIR analysis showed a change in peak intensity in the activated carbon-Fe₃O₄ after the adsorption process, indicating interaction with contaminants. The adsorption process of Fe ions by activated carbon-Fe₃O₄ follows a pseudo-second-order kinetic model.
Synthesis Of CoFe2O4 Nanoparticle and Antibacterial Activity Test Listiyani Purwitasari; Poedji Loekitowati Hariani; Vivi Sisca
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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Abstract

Cobalt ferrite (CoFeâ‚‚Oâ‚„) is a spinel ferrite-based material known for its excellent magnetic properties and chemical stability, making it as a promising candidate for biomedical applications as well as an antibacterial agent. This study aims to synthesize CoFeâ‚‚Oâ‚„ nanoparticles by a coprecipitation methode and evaluate their antibacterial activity against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. The synthesized products were characterized by using several instruments includes X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), FTIR spectroscopy and Vibrating Sampel Magnetometer (VSM) in order to determine its crystal structure, particle morphology, functional groups, and magnetic properties. Antibacterial activity was assessed by using the disk diffusion method. The results showed that CoFeâ‚‚Oâ‚„ nanoparticles were successfully synthesized with nanometer-scale crystallite sizes and exhibited strong ferromagnetic properties. Antibacterial tests demonstrated inhibition zones against the growth of S. aureus and E. coli, indicating that CoFeâ‚‚Oâ‚„ has potential as an antibacterial agent. The effectiveness of antibacterial activity was influenced by nanoparticle concentration and the type of tested bacteria. This research opens up further opportunities for the development of CoFeâ‚‚Oâ‚„ applications in health and environmental fields.
Pelatihan Pembuatan Sabun Transparan Antibakteri Berbahan Ekstrak Daun Mengkudu (Morinda Citrifolia L.) sebagai Upaya Pemberdayaan Masyarakat di Desa Tanjung Atap, Ogan Ilir Harmida Harmida; Nina Tanzerina; Safrina Lamin; Salni Salni; Nita Aminasih; Poedji Loekitowati Hariani
Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Vol. 5 No. 3 (2025): Mei 2025 - Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59395/altifani.v5i3.679

Abstract

Tanaman mengkudu (Morinda Citrifolia L.) telah dikenal masyarakat sebagai salah satu tanaman sebagai sumber obat tradisional. Ekstrak daun mengkudu mengandung senyawa bioaktif seperti fenolik, flavonoid dan antrakuinon yang bersifat antibakteri dan antioksidan. Pemanfaatan ekstrak daun mengkudu sebagai bahan sabun padat transparan antibakteri untuk mendukung pengembangan produk alami, aman digunakan, dan yang paling utama adalah meningkatkan kebersihan dan kesehatan masyarakat. Kegiatan pengabdian masyarakat ini bertujuan memberikan pelatihan pembuatan sabun transparan antibakteri dari ekstrak daun mengkudu yang dilakukan di desa Tanjung Atap, kecamatan Tanjung Batu, kabupaten Ogan Ilir. Kegiatan diikuti oleh ibu-ibu dan remaja putri sebanyak 30 orang. Metode kegiatan meliputi penyuluhan, pelatihan dan evaluasi hasil kegiatan. Hasil pre-test dan pos-test menunjukkan terjadinya peningkatkan pengetahuan peserta tentang sabun transparan antibakteri yang dari ekstrak daun mengkudu. Peserta yang menjawab pertanyaan dengan tepat dari sebelum pelatihan sebanyak 18,75% meningkat menjadi 76,67% setelah pelatihan. Selain itu masyarakat juga menyukai produk sabun yang dihasilkan. Hal ini mengindikasikan keberhasilan kegiatan pelatihan yang diberikan.
Integration of Internet of Things (IoT) on Web-based Chemistry Learning Annisa Filantropie; Suheryanto Suheryanto; Poedji Loekitowati Hariani
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 8, No 3 (2023): October 2023
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v8.i3.120

Abstract

The development of science and technology, especially the development of the internet is very rapid today. The world of education, needs to develop learning innovations involving the internet. Internet of Things is one of the innovative technologies that can connect a device or object into a large data base so as to speed up the information process through the power of the internet network. The application of the Internet of Things in high school chemistry learning, especially in the concentration cell potentiometry method, can be used in practicum in school laboratories. The results showed that the combined method of concentration cell potentiometry integrated with the Internet of Things (Pot-IoT) has been proven effective (n-gain = 0.7208) to be used as a learning medium for the practicum of measuring Pb metal in water samples at school.
Preconcentration of Cr(III) Using Dowex 50WX2-200 Resin and Its Application to River Water Siti Nuraini; Suheryanto Suheryanto; Poedji Loekitowati Hariani
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 8, No 2 (2023): June 2023
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v8.i2.105

Abstract

Cr(III) is one of the most stable chromium species in nature, Cr(III) species are not carcinogenic to humans, but if the levels in the body exceed 0.2 mg / day it is very dangerous for the body especially in the respiratory tract. The presence of chromium in the aquatic environment is so low that it is very difficult to detect it using instruments with various limitations to detect it, therefore preconcentration techniques are carried out to overcome the issue. In this study the water sample was adjusted pH using HNO3 0.1 M or NaOH 0.1 M, after which it was passed in the dowex column 50WX2-200. Furthermore, an elution process was carried out using the 1 M HNO3 eluent, the eluat was measured for absorbance with flame AAS. The results of Cr(III) preconcentration optimization are: resin weight 0.5 g, HNO3 eluent concentration 1 M, solution pH 3 and sample volume 50 – 100 mL. The Cr(III) preconcentration technique using Dowex 50WX2-200 resin has been applied to river water samples with a detectable concentration of 0.0075 mg/L.
Development of a Concentration Cell Potentiometric Method for Fe2+ and Fe3+ Speciation Izzati Izzati; Suheryanto Suheryanto; Poedji Loekitowati Hariani
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 8, No 3 (2023): October 2023
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v8.i3.115

Abstract

The speciation of Fe2+ and Fe3+ iron ions using the concentration cell potentiometric method has been developed. The determination and speciation of metals that have been used include potentiometry using comparison electrodes, selective ion electrodes, and voltammetry. The concentration cell potentiometric method has the advantages of simple equipment, the use of common metal electrodes, high selectivity, and relatively low detection limits. The method validation results for Fe2+ and Fe3+ ion speciation were LOD: Fe2+ 0.22 mg/L Fe3+ 0.29, LOQ: Fe2+ 0,92 mg/L ; Fe3+ 0,01 mg/L, precision (1.17%; 1.2%) and accuracy (95.57%; 93.15%) based on CV Horwtz.  This method has been well applied for Fe2+ and Fe3+ speciation in natural water samples. The concentrations of Fe2+ and Fe3+ species in Sekanak river water were (1.88 mg/L; 2.07 mg/L). Concentration of Fe2+ and Fe3+ species in well water samples (0.5 mg/L; 1.32 mg/L).
Hair Mercury Concentrations among Residents Living Near Artisanal and Small-Scale Gold Mining Activities in Indonesia Rini Maya Sari; Muhammad Irsan; Legiran Legiran; Poedji Loekitowati Hariani; Lia Nurbanillah Fujianti
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 23, No 2 (2026): July 2026
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v23i2.651-662

Abstract

Mercury use in artisanal and small-scale gold mining (ASGM) remains a major public health concern in Indonesia. This cross-sectional biomonitoring study examined the factors associated with mercury exposure among 50 adults living near ASGM activities in the Bungo District. The interview data covered sociodemographic, occupational, behavioral, and exposure-related factors, while hair mercury concentrations were measured using inductively coupled plasma mass spectrometry. Descriptive analyses, bivariate logistic screening, and multivariable logistic regression with backward stepwise selection were performed. In the final model, non-mining participants had lower odds of higher mercury exposure than mining-related workers (OR = 0.164; 95% CI: 0.030–0.892; P = 0.036). Adults aged ≥45 years had lower odds than those aged 21–44 years (OR = 0.097; 95% CI: 0.020–0.474; p = 0.004), whereas women had higher odds than men (OR = 8.032; 95% CI: 1.586–40.675; p = 0.012). The model showed moderate explanatory performance (Nagelkerke R² = 0.414) and 78.0% accuracy. These findings indicate higher exposure among younger adults, women, and mining-related workers, supporting targeted biomonitoring, occupational risk reduction, and community-based interventions in areas affected by ASGM.
Co-Authors Abdullah Abdullah Addy Rachmat Ady Mara Ahmad Fatoni Ahmad Fatoni Ahyati Fadilah Aldes Lesbani Aldi Herbanu Amallia, RA Hoetary Tirta Amri, Nanda Hasanul Annisa Filantropie Aria Septi Handayani Aroef, Hukmanan Rais Asia Asia Afriyani Astri Nurmayansih Bachtari Alam Hidayat Bijak Riyandi Ahadito Damayanti Damayanti Dedi Rohendi Dedi Rohendi Denada, Laellia Desneli Desneli Desnelli Desnelli Desnelli Eddy Ibrahim Eddy Ibrahim Elfita Elfita Elfita Elfita Endri Junaidi Eva Musifa Evi Yuliana, Evi Fahma Riyanti Fatma Fatma Febrina Sari Ferlinahayati Ferlinahayati Handayani Citra Pratiwi Hanifa, Hanifa Marisa Harmida Harmida Harmida Harmida Hasanudin Hasanudin Heni Oktaviani Heni Yohandini Herlina Herlina Hermansyah Hermansyah Hermansyah Hermansyah Hermansyah Hermansyah Hermansyah Hermansyah Hermansyah Herpandi . Hery Widijanto Hesti Ratnasari, Hesti Hilda Zulkifli Indah Hamida Iqlima Amelia Irfannuddin Irfannuddin Izzati Izzati Juswardi Juswardi Kasmiarti, Getari Kimur, Melviana Violetta Laellia Denada Legiran Legiran Leily Nurul Komariah Lia Nurbanillah Fujianti Lilian Novarika Listiyani Purwitasari M. B. Prayitno Maulana Yusuf Melly Oktaria Mgs. Irsan Saleh Mifthahul Jannah Muhammad Faizal Muhammad Faizal Muhammad Irsan Muhammad Irsan Saleh Muhammad Ramdan Abdul Mannan Muhammad Said Muhammad Said Muhammad Said Muhammad Said Muhammad Said Muhammad Said Muhammad Said MUHAMMAD SAID Muharni Muharni Muryati Muryati Mustafa Kamal Nabila Aprianti Nina Tanzerina Nina Tanzerina Nirmalasary, Try Nensy Nita Aminasih Nita Aminasih Novia Novia Nur Hanis Hayati Hairom Nurlisa Hidayati Nurlisa Hidayati Oka Yana Afrizki Putri Erlyn Rani Nawang Sari Ratu Wulandari Permatasari Putri Rini Maya Sari Risfidian Mohadi Risfidian Mohadi Riski Dita Asmara Rizki Indah Putri Rizki, Widya Twiny Robert Sibarani Robiyanto Hendro Susanto Sabila Yunita Safitri, Bella Safrina Lamin Salni Salni Salni Salni Salni Salni Salni Salni Salni Salni Salni Salni Sari, Febrina Setiyawan, Bambang Dwi Shella Santika Damarril Singgih Tri Wardana Siti Nuraini Sri Hartika Subroto Subroto Suheyanto Suheryanto Susila Arita Syafrina Lamin Vilantina, Vilantina Vivi Sisca Widia Purwaningrum Wiwin Sepriani Yogi Astrada Zainal Arifin Zazili Hanafiah Zulfikar Zulfikar