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All Journal POSITRON JURNAL FISIKA Jurnal Fisika FLUX Science and Technology Indonesia Jurnal Pengabdian UntukMu NegeRI Jurnal Penelitian Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry IJEMS (Indonesian Journal of Environmental Management and Sustainability) Riau Journal of Empowerment Jurnal Pengabdian Masyarakat Teknik Bulletin of Chemical Reaction Engineering & Catalysis
Idha Royani
Jurusan Fisika, Universitas Sriwijaya
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences

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Journal : Science and Technology Indonesia

 1 
High Performance of Ni-Al/magnetite Biochar for Methyl Orange Removal in Aqueous Solution Palapa, Neza Rahayu; Zahara, Zaqiya Artha; Mohadi, Risfidian; Royani, Idha; Lesbani, Aldes
Science and Technology Indonesia Vol. 9 No. 1 (2024): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.1.156-166

Abstract

Elevated concentrations of dyes in water have a significant impact on both the aquatic ecosystem and human well-being. The adsorption approach, which is cost-effective and simple to use, was chosen for color treatment. The adsorbents used in this study were Modified Layered Double Hydroxides (LDHs) and Magnetite Biochar (MBC). To prepare the Ni-Al/MBC composites, a technique called coprecipitation and hydrothermal was employed. The successful preparation of these composites was confirmed through the use of characterization tests including X-Ray Diffraction (XRD), Fourier Transform – Infra Red (FT-IR), Brunauer Emmet Teller (BET), and Vibrating Sample Magnometer (VSM). The study focused on analyzing the kinetics, isotherms, and thermodynamics of adsorption in order to anticipate the mechanism of Methyl Orange (MO) adsorption. Additionally, the regeneration process was investigated to assess the adsorbent's ability for repeated usage. The percentage of Ni-Al/MBC adsorbed during the first to fifth regeneration cycles was 86.940%, 82.545%, 70.752%, 56.244%, and 34.503% respectively. The duration of contact was 70 minutes, as determined by the Pseudo Second Order (PSO) equation, with an adsorption rate of 0.0030 g/mg.min. The Langmuir equation indicated a maximum adsorption capacity of 45.455 mg/g.
Synthesis of Ion Imprinted Polymers (IIPs) Adsorbent Materials Using Fe(III) Leaching Process with Variation of Hydrochloric Acid Solvent Concentration and Heat Treatment Royani, Idha; Maimunah; Edianta, Jaya; Alfikro, Ihsan; Fiber Monado; Jorena; Satya, Octavianus Cakra; Virgo, Frinsyah
Science and Technology Indonesia Vol. 9 No. 2 (2024): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.2.336-344

Abstract

Fe(III)-IIPs material was prepared using a cooling-heating method with different leaching variations. The synthesis process used several chemical components, including EGDMA, MAA, and BPO as the crosslinker, functional monomer, and initiator. This study focused on the template formation process of IIPs with leaching variations, using parameters such as molarity concentration, solution mixture, and temperature to influence the amount of template formed in the polymer body. The spectra of XRD showed a widening value of FWHM as higher molarity was applied during the leaching process, with the widest one at 0.163 rad for IIPs 3 M. Fe(III) peak is located at 680-610 cm−1 or 1386-1350 cm−1 within the unleached sample, according to FTIR spectra. It also can be traced at minimum intensity in leached samples. SEM data processing showed that higher concentrations were essential in releasing Fe(III) ions from the polymer body. Meanwhile, heat treatment did not strongly impact the template formation sites of IIPs. Synthesized Fe(III)-IIPs materials had adsorption capacity, optimum time, and efficiency of 9.35 mg.g−1, 40 minutes, and 93.48%, respectively. Based on the results, Fe(III)-IIPs materials had great potential as adsorbents for removing metal pollutants from water.
Antibacterial Properties of Taro: Extraction, Antibacterial Testing Method, Modification and Application Atina; Royani, Idha; Assa'idah; Arsyad, Fitri Suryani
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.2.374-401

Abstract

Taro plants (Colocasia esculenta) contain secondary metabolites identified as antibacterial, antioxidant, anti-inflammatory and anticancer such as alkaloids, glucosides, terpenoids, resins, flavonoids, saponins, phenols, tannins, amino acids. This article discusses various sources related to the potential of taro as an antibacterial, the discussion includes the content of secondary metabolites along with their properties and characteristics, medicinal plant extraction methods, antibacterial testing, applications and future challenges. This review research used data in the form of articles from Scopus, PubMed and Web of Science indexed sources, published between 2015-2024. Data were analyzed descriptively to summarize trends in antibacterial activity and variability across studies. Ethanol extract of taro was screened for secondary metabolite content, antibacterial activity was tested by Kirby Bauer method. Synthesis of antibacterial medicinal plant-based nanoparticles were successfully synthesized with size range between 10-120 nm, with inhibition zones between 11.9-37 mm against pathogens such as S. aureus, E. coli, and L. monocytogenes. Antibacterial nanofibers were synthesized by electrospinning, self-assembly, phase separation, template synthesis, coaxial electrospinning,electrospraying. Characterization used UV-Vis Spectroscopy, FTIR, TEM, XRD, SEM-EDX, HPLC to separate, identify, and quantify bioactive compounds. Common antibacterial mechanisms include inhibition of protein and nucleic acid synthesis, cell membrane damage, and cell structure modification. The application of taro as antibacterial is investigated in pharmaceutical field, industrial field, food field, waste treatment, dentistry field, biomedical field. The development of taro as an antibacterial has great prospects in the pharmaceutical industry, especially as a safe and effective alternative to conventional antibiotics.
Synthesis and Characterization of Polyvinyl Alcohol (PVA) Nanofiber Membranes with Annonamuricata and Terminalia catappa Leaf Extract Fitria, Silfiyana; Almafie, Muhammad Rama; Alfikro, Ihsan; Monado, Fiber; Sriyanti, Ida; Royani, Idha
Science and Technology Indonesia Vol. 10 No. 3 (2025): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.3.837-846

Abstract

Polyvinyl alcohol (PVA) is hydrophilic, flexible, elastic, and environmentally friendly, leading to the wide use as a binder in nanofiber matrices. The nanofibers of PVA are frequently combined with extract possessing antibacterial properties for characterization. Therefore, this study aimed to produce PVA nanofibers incorporating soursop leaf extract (ALE) and catappa leaf extract (CLE) using electrospinning for the investigation of the physicochemical, mechanical, and antibacterial properties. Electron microscopy showed that the electrospun nanofibers had a yellowish-brown surface with diameters ranging from 962 nm to 1323 nm. Fourier Transform Infrared (FTIR) analysis revealed the presence of functional groups interacting through hydrogen bonding, leading to a shift in wavenumbers. The tensile strength of PAC-1, PAC-2, and PAC-3 nanofibers decreased from 8.46 MPa to 4.27 MPa, followed by a reduction in Young’s modulus from 20.2 MPa to 0.89 MPa. The effect of extract concentration on the reduction in tensile strength and Young’s modulus was related to aggregation in certain areas of the nanofibers and weakened intermolecular polymer interactions. Pure extract had strong antibacterial activity and nanofiber membranes had moderate activity with inhibition zones ranging from 12.3 to 16.8 mm and 8.0 to 14.4 mm, respectively. The results showed that the produced fibers could be used in the biomedical field for wound dressings and filtration, as well as in textiles.
Co-Authors Akmal Johan Aldes Lebani, Aldes Aldes Lesbani Alfahidayah, Arini Alfikro, Ihsan Alfikro, Muhammad Ihsan Almafie, Muhammad Rama Amiruddin Supu Amri Amri Arsyad, Fitri Suryani Assa'idah Assaidah, Assaidah Atina Berliani, Berliani Dani, Rahma Dedi Setiabudidaya Edianta, Jaya Enda Susanty Erry Koriyanti Fiber Monado Fitria, Silfiyana Frinsyah Virgo Hadir Kaban Hadir Kaban, Hadir Hanifah, Yulizah Hesti Dwi Kartika Hijrah, Muhammad Husin, Sadam Ida Sriyanti Irma Suryani Ismail, Dede Ridwan Jorena Jorena Jorena, Jorena Karvenia, Icha Aulia Khairul Saleh Liasari, Beta Riana Maimuna Maimuna, Maimuna Maimunah Mardiyanto Mardiyanto Megawanto, Dian Menik Ariani Nur Ahmad, Nur Nur’aini, Siti Octavianus Cakra S. Octavianus Cakra Satya Rakhmawati Farma Risfidian Mohadi Rohmatullaili, Rohmatullaili Rudy Setiawan Sari, Putri Ailana Yhawita Sastia, Eti Desti Soerya, Balada Su'ud, Zaki Supardi Supardi Weanda, W Wibiyan, Sahrul Wijaya, Alfan Yulinar Adnan Zahara, Zaqiya Artha Zaki Su'ud