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Jurnal Ilmiah Berkala: Sains dan Terapan Kimia
Published by Universitas Lambung Mangkurat
ISSN : 14111616     EISSN : 25498215     DOI : http://dx.doi.org/10.20527
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
Sains dan Terapan Kimia (Jurnal Ilmiah Berkala) published scientific articles in the Chemistry field which include, but not limited to, research in chemistry, theoretical chemistry, chemistry education, and applied chemistry. This journal also published review articles about the development of chemistry.
Arjuna Subject : Kimia(semua kategori) - Inorganic Chemistry
Articles 244 Documents
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The Potential of Ironwood as an Activated Carbon Adsorbent for Heavy Metal Mercury (Hg) Using the Pyrolysis Method Pereiz, Zimon; Oksal, Efriyana; Chuchita, Chuchita; Sylvani, Miranti Maya; Pebriyanto, Yunus
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

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 Ariyani, Dahlena
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

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 Ola, Pius Dore
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

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 Wardhani, Gladys Ayu Paramita Kusumah; Ariesta, Nina
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

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 .

Page 25 of 25 | Total Record : 244

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