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Rahmat Eko Sanjaya
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Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat, Jl. A. Yani KM 36, Banjarbaru 70714, South Kalimantan, Indonesia
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Jurnal Ilmiah Berkala Sains dan Terapan Kimia
Published by Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat
ISSN : 14111616     EISSN : 25498215     DOI : http://dx.doi.org/10.20527
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry
Jurnal Ilmiah Berkala Sains dan Terapan Kimia is a peer-reviewed and open-access scientific journal published by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat. The journal publishes high-quality original research articles, review articles, and short communications in chemistry and applied chemical sciences. The journal welcomes manuscripts in the following areas: Organic Chemistry, Inorganic Chemistry, Physical Chemistry, Analytical Chemistry, Biochemistry, Environmental Chemistry, Natural Product Chemistry, Materials and Polymer Chemistry, Computational and Molecular Chemistry, Theoretical Chemistry, and Applied Chemistry. The journal is published biannually in January and July.
Arjuna Subject : Kimia(semua kategori) - Inorganic Chemistry
Articles 256 Documents
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The Potential of Ironwood as an Activated Carbon Adsorbent for Heavy Metal Mercury (Hg) Using the Pyrolysis Method Zimon Pereiz; Efriyana Oksal; Chuchita Chuchita; Miranti Maya Sylvani; Yunus Pebriyanto
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i1.20957

Abstract

This study focuses on the utilization of ironwood as an activated carbon adsorbent to remove heavy metal mercury (Hg). The background of the problem includes mercury pollution from various industrial sources and its harmful impacts on the environment and human health. The purpose of this study was to develop an effective method for adsorbing mercury using natural ironwood materials. The research method involves the synthesis of activated carbon through pyrolysis and chemical activation processes, followed by a series of adsorption tests on mercury with variations in pH conditions, contact time, and acid concentration. The research data showed that the optimum adsorption capacity was achieved at a mercury concentration of around 500 ppm, with high adsorption efficiency at pH 1 and a contact time of 80 minutes. The results also showed that the adsorption kinetics followed a second-order model with a rate of 0.017119 g/mg.min. In conclusion, the mercury adsorption process using activated carbon from ironwood followed the Langmuir isotherm model, with an adsorption capacity of 63.036 mg/g, indicating that the adsorbent had been successfully synthesized and had an effective ability to remove mercury.
Synthesis And Characterization Of Acid-Activated Sago Dregs Biochar And Testing Its Ability As An Adsorbent For Rhodamine B Dyes Dahlena Ariyani
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i1.21804

Abstract

Synthesis & characterization of acid-activated sago pulp biochar as an adsorbent of rhodamine B dye has been carried out. This study aims to synthesize & characterize sago pulp biochar activated with HCl 1 M & H3PO4 0,214 M solutions & to assess its ability as an adsorbent of rhodamine B dye. This biochar is produced through a pyrolysis method with a combustion temperature of 700 °C for 2 hours. The results of the pyrolysis biochar were then activated with HCl 1 M & H3PO4 0,214 M acid solvents & then analyzed the effect of contact time, pH, & initial concentration on its ability to adsorb rhodamine B dye. Characterization using Fourier Infrared (FTIR) showed the presence of alkene groups & aromatic groups (C=C) & bonds (CO) & (CC) which play an important role in the adsorption process. The results of the water content of BAS, BAS/HCl & BAS/H3PO4 produced were 2.57%, 4.47% & 5.06% which met the requirements of SNI 06-3730-1995. The results of the surface area test showed BAS/H3PO4 with the largest surface area of 0,520 m2/g & BAS of 0,452 m2/g while the smallest surface area was BAS/HCl of 0,445 m2/g. The study of the effect of pH & contact time on the adsorption capacity of rhodamine B showed that the optimum adsorption capacity of pure sago pulp biochar (BAS) at neutral pH with a contact time of 15 minutes, BAS/HCl at acidic pH with a contact time of 180 minutes, & BAS/H3PO4 at alkaline pH with a contact time of 60 minutes. Based on the analysis results, the adsorption process of rhodamine B on biochar follows the Langmuir & Freundlich isotherms with maximum adsorption capacities for BAS, BAS/HCl, & BAS/H3PO4 of 4.285 mg/g, 4.834 mg/g, & 3.934 mg/g, respectively.
Ethanol Extract of Areca Nut (Areca catechu L.) as a Complexing Agent to Determinate Fe(III) in Water Media Pius Dore Ola
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i1.16794

Abstract

A complexing agent is very critical in the analysis of metal ions with spectrophotometry Uv-Vis method. The most widely used complexing agents are un-environmental and expensive industrial products. This work employed the ethanol extract of the areca nut as a complexing agent to determine the Fe(III) in water media, which is the most likely to pollute the environment.  We found that the optimum reaction between areca nut extract with Fe(III) occurred at pH 5 and in the ratio of 21.6 mg/L Fe(III): 10 mg/L of extract. This mixture reached the highest absorbance at around 30 minutes. The spectrometric and digital image methods show the linear relation between Fe(III) concentration and absorbance with a correlation coefficient of  0.998 and 0.997 (for the green component), respectively. However, the spectrometric method shows more comparable performance parameters with the use of KSCN as a complexing agent than the digital image method. This method was also applied to analyse Fe(III) in the real water sample, and all samples' recoveries were acceptable.
Green Synthesis of CaO Nanoparticle from Chicken Eggshell using Lemongrass Leaf Water Extract Gladys Ayu Paramita Kusumah Wardhani; Nina Ariesta
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i1.17859

Abstract

Sources of CaO in the synthesis of nanoparticles can be available from waste such as eggshell waste which has an average CaCO3 content of 94%. The study aimed to synthesize nanoparticles with various compositions of CaO-0 and CaO-1  (50 : 50) yielded from chicken egg shells mediated by extracts Cymbopogon citratus leaves and characterized the nanoparticles. Based on the results of phytochemical screening, Cymbopogon citratus extract contained alkaloids, flavonoids, triterpenoids, and tannins. The results of characterization with UV-Vis spectrophotometer showed that CaO was formed at the highest wavelength with a composition of CaO-1 (50 : 50) with a value of 250-300 nm. Absorption band of FT-IR spectra at wave numbers 428 cm-1 and 711 cm-1, it’s indicate of Ca-O vibrational band and Ca-O bonds, respectively. The particle size of crystalline CaO-0 based on calculations using the Debye Scherrer formula ranged from 33.72 - 38.48 nm while the particle size of crystalline CaO-1 ranged from 28.93 - 70.75 nm with diposide and calcite phases based on XRD data. The surface morphology using SEM shown that CaO-0 was shaped like an irregular cube while CaO-1 forms irregular spherical lumps. Keywords: CaO, green synthesis, Cymbopogon citratus, nanoparticle .
Characteristics of Chitosan from Chitin Deacetylation Using Different NaOH Concentration and Evaluation of Its Solubility in Liquid Smoke Ahmad Budi Junaidi; Nurul Hikmah; Utami Irawati; Nawwal Hikmah; Taufiqur Rohman
Jurnal Sains dan Terapan Kimia Vol 20, No 1 (2026)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v20i1.25118

Abstract

This research aimed to determine the effect of chitosan characteristics produced from the deacetylation of chitin with various concentrations of NaOH on its solubility in liquid smoke. Chitin produced from rajungan shell raw materials was deacetylated using 40% NaOH (K40%), 50% (K50%), and 60% (K60%). The resulting chitosan was then measured of its degree of deacetylation (DD), molecular weight (BM), and solubility in liquid smoke. The results showed that K40% had a DD of 56.99%, K50% had a DD of 72.86% and a BM of 149.1 kDa, also K60% had a DD of 82.87% and a BM of 102.6 kDa. The solubility of chitosan in 10% liquid smoke indicated that K40% was not dissolved, K50% was almost completely dissolved, and K60% was completely dissolved.
Network Pharmacology-Based Evaluation of Sungkai (Peronema canescens J.) Leaf Bioactive Compounds as Potential Therapeutics for Cervical Cancer Ratih Dyah Puspitasari
Jurnal Sains dan Terapan Kimia Vol 20, No 1 (2026)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v20i1.24974

Abstract

Cervical cancer continues to pose a significant public health challenge, especially in low- and middle-income countries, largely due to persistent Human Papillomavirus (HPV) infection and the limited efficacy and safety of current therapies. Although flavonoid-based anticancer agents such as jaceosidin have shown anticancer activity, their clinical use is limited by low bioavailability and insufficient clinical evidence, underscoring the need for safer, more effective therapeutic options. This study utilized in silico and network pharmacology methods to assess bioactive compounds from Sungkai leaves (Peronema canescens J.). Seven peronemin derivatives were evaluated for drug-likeness, toxicity, and anticancer potential through ADMET predictions, bioactivity profiling, and protein target identification. The findings demonstrated that peronemin C1 and D1 possess activity against cervical cancer cell lines and exhibit favorable pharmacokinetic properties. Network pharmacology analysis identified 115 cancer-associated targets, with STAT3 identified as a central hub regulating cell proliferation, apoptosis, and inflammatory signaling. Functional analyses further indicated that peronemin compounds modulate key oncogenic pathways, supporting their multitarget potential. Collectively, these results indicate that peronemin compounds from Sungkai leaves, particularly C1 and D1, are promising candidates for the development of cervical cancer therapies targeting STAT3.
Analysis of Atmospheric Vertical Structure During Hail in Tangerang: A Comparative Study of ECMWF Model Data and Radiosonde Observations Dhanu Prakoso; Aries Kristianto
Jurnal Sains dan Terapan Kimia Vol 20, No 1 (2026)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v20i1.24961

Abstract

Hail is an extreme weather event in tropical regions with local characteristics, short duration, and difficult to predict precisely. The hail event in Tangerang on October 31, 2025, is an important anomaly to study in order to understand the atmospheric structure that triggers massive instability in urban areas. This study aims to identify the vertical conditions of the atmosphere through a comparative study between global numerical model data from the European Centre for Medium-Range Weather Forecasts (ECMWF) and in-situ Radiosonde observation data. The methodology used is a case study approach by integrating remote sensing data from the Himawari-9 Satellite and C-Band Weather Radar to validate the structure of storm cells. Thermodynamic parameters such as Convective Available Potential Energy (CAPE) and freezing level profiles are extracted using Python programming to evaluate the model's ability to represent atmospheric lability conditions. The results of this study are expected to provide a reference for weather forecasters regarding the effectiveness of using global model data as an alternative to limited observational data in the early detection of extreme convective phenomena in Indonesia.
Performance Evaluation of Bentonite–Nano SiO₂ as an Adsorbent in the Decolorization Process of Rhodamine B Regna Tri Jayanti; Miftahul Khairati; Enny Nurmalasari; Puji Rahayu; Dennis Farina Nury; Okti Ulandari; Andhini Putri Trianita
Jurnal Sains dan Terapan Kimia Vol 20, No 1 (2026)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v20i1.24444

Abstract

Among various sources of industrial water pollution, effluents from printing, dyeing, and textile processes represent one of the most significant environmental threats. These wastewaters contain numerous toxic and hazardous substances that are difficult to biodegrade. This study investigates the synthesis, characterization, and adsorption performance of a Bentonite–Nano SiO₂ composite for the removal of Rhodamine B dye from aqueous solutions. The research was conducted in two main stages: the preparation of the Bentonite–Nano SiO₂ composite and the evaluation of its adsorption performance at various adsorbent concentrations and contact times. The composite was synthesized by dispersing nano-silica (15% w/w) into bentonite using ethanol as the solvent, followed by stirring, filtration, and drying processes. Characterization using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) confirmed successful modification. Adsorption tests showed that Rhodamine B removal efficiency increased with higher adsorbent concentration, reaching optimal conditions at 0.75% (w/v) with a removal efficiency of 90.2% after a contact time of 10–15 minutes. The enhanced adsorption performance was attributed to the larger surface area, higher porosity, and increased number of active sites resulting from the incorporation of nano-silica
Efficiency of Chitosan and Alum as Coagulants for Peat Water Treatment Dahlena Ariyani; Utami Irawati; Taufiqur Rohman
Jurnal Sains dan Terapan Kimia Vol 20, No 1 (2026)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v20i1.25697

Abstract

Penelitian ini mengkaji efisiensi dari kitosan dan tawas sebagai koagulan untuk pengolahan air gambut. Dosis dan pH optimum koagulasi ditentukan berdasarkan penurunan turbiditas dan kadar senyawa organik dalam air gambut setelah dikoagulasi dengan kitosan dan tawas. Hasil penelitian menunjukkan bahwa dosis optimum untuk kitosan sebesar 5 mg/L dan tawas sebesar 15 mg/L dengan penurunan turbiditas sebesar 81,91% dan 76,28%. Koagulasi oleh kitosan dan tawas dipengaruhi oleh pH, dimana koagulasi oleh kitosan berlangsung optimum pada pH 8 dengan penurunan turbiditas sebesar 83,36%. Untuk tawas, pH optimum koagulasi adalah pada pH 7 dengan penurunan turbiditas sebesar 88,02%. Hasil penelitian menunjukkan bahwa tawas lebih efektif dibandingkan dengan kitosan dalam menurunkan kadar senyawa organik pada air gambut.
Larvacidal And Oviposition Deterrent Activity of Dragon Scale Fern (Pyrrosia piloselloides (L.) M. G. Price) Extract Against Culex sp. Khodijah Amini Tanjung; Halimatussakdiah Halimatussakdiah; Muslimah Muslimah
Jurnal Sains dan Terapan Kimia Vol 19, No 2 (2025)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i2.21621

Abstract

ABSTRACT Dragon scale fern (Pyrrosia piloselloides (L.) M. G. Price) is one of the plants that grows and spreads wild throughout the tropics and this plant is an epiphyte (a plant that attaches to the stems of other plants), but is not a parasite because this plant can make its own food. This study aims to test the larvicidal and oviposition deterrent activities of the methanol extract of dragon scale fern. Dry leaves of P. piloselloides (L.) M. G. Price were macerated with methanol to produce 30.5 g of methanol extract. Methanol extract contained secondary metabolites compounds of steroid, saponin, flavonoid, and tannin. The methanol extract was tested for larvicidal and oviposition deterrent activities against Culex sp. mosquitoes with concentrations of 31.25; 62.50; 125; 250; 500; 1000; and 2000 ppm. The results showed strong larvicidal activity (toxic) with an LC50 value of 143 ppm, and oviposition deterrent activity produces % ER of 72% at a concentration of 2000 ppm. The results of the study showed that methanol extract of dragon scale fern can be used as a natural larvicidal and oviposition deterrent, this activity is contributed by the presence of secondary metabolite compounds, especially flavonoids, saponins, tannins, and steroids.

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