Article Per Year (5 Year)
p-Index From 2021 - 2026
2.57
P-Index
This Author published in this journals
All Journal JURNAL KIMIA SAINS DAN APLIKASI PROSIDING SEMINAR KIMIA KOVALEN: Jurnal Riset Kimia Jurnal Kimia Mulawarman JURNAL ATOMIK JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Abdimas Mahakam Bulletin of Chemical Reaction Engineering & Catalysis
Soerja Koesnarpadi
Jurusan Kimia Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Mulawarman
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Public Health Social Sciences

Published : 20 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 10 Documents
Search
Journal : JURNAL ATOMIK

 1 
PEMBUATAN DAN KARAKTERISASI ADSORBEN KITOSAN–SILIKA DAN PENGAPLIKASIAN TERHADAP ADSORPSI ION Cd2+ Nisa, Muflihatu Khoiratun; Lianasari, Ika Yekti; Koesnarpadi, Soerja
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Research has been conducted on the synthesis of chitosan-silica adsorbents from chitosan and silica derived from TEOS (Tetraethyl Orthosylicate). The chitosan-silica was made by mixing chitosan solution and silica soles that were previously chitosan we were added with acetic acid and silica solution we were added with aqueous solution, ethanol and HCl(p). The result from characterization of FT-IR chitosan-silica adsorbents indicates the presence of OH, NH2, Si-O, Si-O-Si, chitosan adsorbents that only have OH and NH2 groups and silica adsorbents that only have OH, Si-O and Si-O-Si groups. Application of chitosan, silica and chitosan-silica adsorbents to adsorp Cd2+ ion. Cd2+ ion concentration after adsorption was determined by atomic absorption spectrophotometer (AAS). Adsorption Cd2+ ion in chitosan-silica successfully indexed Cd2+ by 98.67% while for chitosan adsorbents by 97.87% and while silica adsorbents by 79.45%. The Sem results showed that when adsorbents before soaking with Cd2+ it was seen that the morphology of the surface of the pores adsorbent there is still a cavity then when after soaking with Cd2+ pores filled by ions Cd2+.
UJI AKTIVITAS TABIR SURYA EKSTRAK HERBA MENIRAN (Phyllanthus niruri L.) Nabila, Sahira Fara; Koesnarpadi, Soerja; Widodo, Nanang Tri; Isyahro, Novia Rahmawati; Marliana, Eva
JURNAL ATOMIK Vol 7 No 2 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Tests of sunscreen activity of meniran (Phyllanthus niruri L.) herbs extract has been done. The methodwas carried out using an UV-Vis spectrophotometer in vitro based on the method of A. J. Petro. The sunscreenactivity based on the value of the Sun Protection Factor (SPF) meniran herbs extract, respectively, was 1,826;3,337; 6,096; 11,132 and 20,354. The SPF value of sunscreen activity showed that meniran herbs extract has aminimum to ultra protection category.
PENENTUAN VARIASI KOMPOSISI DAN pH OPTIMUM ADSORBEN KITOSAN-Fe3O4 BERDASARKAN PERSEN PENYERAPAN ION Pb2+ Lianasari, Ika Yekti; Koesnarpadi, Soerja; Pratiwi, Djihan Ryn; Munandar, Aris
JURNAL ATOMIK Vol 8 No 1 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Previously, the synthesis of Chitosan-Fe3O4 adsorbent from magnetite (Fe3O4) made from ferrous ammonium sulfate (III) and ferrous ammonium sulfate (II) in a ratio of 3:1 was carried out. The adsorbent is adjusted with the ratio of magnetite and chitosan composition 1:1; 1:2 and 2:1 with the help of glutaraldehyde as a crosslinker. The results showed that the ratio of the ideal composition is 1:1 with % absorption that is 94.97% in 24 hour, and the optimum pH is obtained at pH 5 with % absorption of 92.18% for Pb2+ ions.
ADSORPSI FENOL MENGGUNAKAN ADSORBEN KOMPOSIT Fe3O4-ARANG AKTIF AMPAS KOPI Reknosari, Elen; Wirawan, Teguh; Koesnarpadi, Soerja
JURNAL ATOMIK Vol 6 No 2 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRAK Adsorpsi fenol menggunakan adsorben komposit Fe3O4-Arang aktif ampas kopi telah dilakukan. Adsorben komposit Fe3O4-Arang aktif ampas kopi disintesis dari FeSO4.7H2O dan FeCl3.6H2O dengan perbandingan 3:2 kemudian dikomposit dengan arang aktif ampas kopi. Adsorben komposit Fe3O4-Arang aktif ampas kopi dikarakterisasi dengan Fourier Transform Infared (FTIR) dan Scanning Electron Microscopy (SEM) serta dilakukan uji adsorpsi terhadap fenol. Hasil karakterisasi dengan Fourier Transform Infared (FTIR), muncul peak 1604,77 cm-1 menunjukkan adanya serapan C=O yang menyatakan bahwa ampas kopi telah membentuk zat karbon. Selain itu adsorben komposit Fe3O4-arang aktif ampas kopi muncul peak pada panjang gelombang 509,21 cm-1 yang merupakan gugus Fe-O menunjukkan bahwa nanopartikel Fe3O4 telah berhasil tercangkok pada struktur arang aktif. Kondisi optimum adsorpsi fenol menggunakan adsorben komposit Fe3O4-arang aktif ampas kopi adalah pada waktu kontak 30 menit dan pH 5. Kata kunci: Adsorpsi, Fenol, Magnetit, Arang Aktif, Ampas Kopi
ADSORPSI ION LOGAM KADMIUM (II) MENGGUNAKAN MAGNETIT (Fe3O4)-ARANG AKTIF KULIT BUAH TATAP (Artocarpus odoratissimus) Fatmawati, Ririn Anggraeni; Koesnarpadi, Soerja; Wirawan, Teguh
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1412

Abstract

Adsorption of cadmium (II) metal ions has been carried out using magnetite adsorbent (Fe3O4) and Fe3O4-activated charcoal composite of tarap fruit peel (Fe3O4-AA). The Fe3O4 adsorbent was made using the coprecipitation method from FeSO4.7H2O and FeCl3.6H2O with a mole ratio of 1:1. Composite adsorbent Fe3O4-activated charcoal from tarap fruit peel from Fe3O4 combined with activated charcoal from tarap fruit peel. The separation process uses the help of an external magnet, and the cadmium concentration is analyzed using an Atomic Absorption Spectrophotometer (SSA). on the adsorbent. The results of characterization using FT-IR on Fe3O4 show the presence of Fe-O groups and on Fe3O4-AA it shows the presence of Fe-O and -OH groups and there are C-O groups from activated charcoal. In XRD analysis, diffraction peaks were obtained which were not much different from standard Fe3O4Fe3O4 with a smooth and sharp crystal structure. Furthermore, in the VSM analysis, results were obtained in the form of magnetization curves which showed that Fe3O4 and Fe3O4-AA were superparamagnetic. The optimum conditions for the magnetite (Fe3O4) adsorbent at pH 6 with a contact time of 60 minutes and an adsorption capacity of 23.3664 mg/g, while the optimum conditions for the composite adsorbent Fe3O4-AA at pH 5 with a contact time of 45 minutes and a maximum adsorption capacity of 26.4550 mg/g. The absorption percentage of the Fe3O4 adsorbent was 95.042% and the Fe3O4-AA adsorbent was 95.092%.
Pembuatan Arang Aktif Kulit Buah Tarap (Artocarpus odoratissimus B.) dan Komposit Fe3O4-Arang Aktif Kulit Buah Tarap Sebagai Adsorben Logam Kadmium (Cd) Fradita, Windiy Mira; Koesnarpadi, Soerja; Wirawan, Teguh
JURNAL ATOMIK Vol 10 No 1 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i1.1411

Abstract

Tarap (Artocarpus odoratissimus B.) is a species of the genus Artocarpus and belongs to the Moraceae family. In its use, fruit cores, skins, and leaves can become metal adsorbents. This research aims to determine the characteristics and adsorption capacity of tarap fruit skin, which can be an alternative to dealing with cadmium (Cd) metal pollution. Making activated charcoal adsorbent tarap fruit peel was carbonated at a temperature of 450ºC for 1 hour and activated using 2 M HCl, while the Fe3O4-activated charcoal composite tarap fruit peel was made using the coprecipitation method from FeSO4.7H2O and FeCl3.6H2O with a mole ratio of 1:1 and then combined with tarap fruit peel activated charcoal to adsorb cadmium metal using the batch method, which is separated using an external magnet and analyzed using an Atomic Absorption Spectrophotometer. The results of FT-IR characterization on both adsorbents contained C-O and O-H groups and on the Fe3O4-activated charcoal composite of tarap fruit peel, there were Fe-O groups. The XRD difactogram shows that there is a Fe3O4 diffraction pattern with relatively small intensity in the Fe3O4-activated charcoal composite of tarap fruit peel. The results of VSM analysis show that the Fe3O4-activated charcoal composite of tarap fruit peel is paramagnetic. The optimum conditions for the adsorption of cadmium metal on activated charcoal from tarap fruit peel were at pH 7 with a contact time of 60 minutes and on the Fe3O4-activated charcoal composite from tarap fruit peel at pH 6 with a contact time of 45 minutes. The maximum adsorption capacity of activated charcoal from tarap fruit peel is 11.1316 mg/g and for the Fe3O4-activated charcoal composite tarap fruit peel is 22.9510 mg/g.
SYNTHESIS OF CHITOSAN-MAGNETITE NANOPARTICLES CROSS-LINKED TRIPOLYPHOSPHATE AS ANTIBACTERIAL Salmonella typhi AND Staphylococcus aureus Mahyati, Agus; Koesnarpadi, Soerja; -, Erwin
JURNAL ATOMIK Vol 6 No 1 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Magnetite is widely used in various fields of separation, biochemistry, medical and environment. Modification of nanoparticle magnetite binding with chitosan is recommended for many biomedical applications, especially as a drug delivery system because in addition to its non-toxic, biodegradable and biocompatible characteristics. Another advantage of biomedical benefits as antimicrobial is that it can increase antibacterial activity and has a more pronounced effect on gram-negative and gram-positive bacteria. Synthesis and characterization of chitosan-magnetite cross-linked tripolyphosphate as an antibacterial of S. typhi (Gram negative) and S. aureus (Gram positive) has been carried out. The phase of this research was initiated by the synthesis of FeSO4.7H2O and FeCl3.6H2O magnetite with a mass ratio of Fe (II): Fe (III) = 2: 3, using the co-precipitation method. In the second stage where the cross-linking of chitosan with TPP cross-linker to form ferrogel. In the third stage the synthesis of TPP-chitosan-magnetite in a ratio of 1: 4, with a slight addition of NH4OH as participant material. The results showed that FT-IR on TPP-chitosan-magnetite has a unique spectrum, XRD results showed the crystal structure of TPP-chitosan-magnetite did not change. Surface morphology shows that TPP-chitosan-magnetite is a spherical surface. Chitosan-Magnetite material has greater antibacterial activity than chitosan and magnetite bacteria S. typhi (Gram negative) and S. aureus (Gram positive).
STUDY ON PHOTODEGRADATION ACTIVITY OF RHODAMINE B BY WO3/TIO2/SIO2 COMPOSITES IN VARIOUS MATERIAL WEIGHT CONDITION Adhaina, Karina; Hindryawati, Noor; Koesnarpadi, Soerja
JURNAL ATOMIK Vol 5 No 1 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A study on photodegradation activity of Rhodamine B by WO3/TiO2/SiO2 composites in various material weight condition has been conducted. The photocatalytic process was carried out in a closed reactor equipped with visible lamps (grow LED 10 watt). To identify crystal structure, morphology and composition of composite WO3/TiO2/SiO2, the characterization performed using Scanning Electron Microscopy-Energy Diffraction-X (SEM-EDX). The results of characterization using SEM-EDX showed that composites have a non-uniform pore morphology. The photocatalytic test showed the optimum material weight at 0.15 gram with percent degradation of Rhodamine B dyes of 85.10%.
ADSORPSI ION LOGAM Pb2+ DENGAN ARANG AKTIF MAHKOTA NANAS (Ananas comosus (L.) Merr) TERMODIFIKASI KITOSAN Arsyakia, Tarisa; Koesnarpadi, Soerja; Lianasari, Ika Yekti
JURNAL ATOMIK Vol 10 No 1 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i1.1436

Abstract

Pineapple (Ananas comosus (L.) Merr) is one of the most widely produced plants in Indonesia. Pineapple crown can be classified as solid waste that has an impact on the environment. Another problem of environmental pollution is heavy metals such as lead. In this study, modification was carried out by adding chitosan to the activated charcoal prepared from pineapple crown powder waste. The purpose of this study was to determine the characterization of chitosan-modified pineapple crown activated charcoal using Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM), determine the optimum adsorption conditions based on variations in pH, contact time and concentration of Pb2+ metal and determine the percent absorption and adsorption capacity. The results of FT-IR characterization of pineapple crown charcoal, chitosan and chitosan-modified activated charcoal indicated the presence of O-H (streching), N-H, C-H (streching), C=C aromatic and C-H (bending) groups, and in pineapple crown charcoal and chitosan-modified pineapple crown activated charcoal also indicated C-O-C groups while chitosan indicated C-N groups. In the results of SEM characterization, pineapple crown charcoal has a smooth, chitosan has a rough and chitosan-modified activated charcoal has a slightly rough surface and is still tightly bound to each other. The optimum conditions for adsorption of chitosan-modified activated charcoal on Pb2+ metal ions at pH 4 with a contact time of 60 minutes and a concentration of 75 mg/L. The results of the adsorption capacity test at each pH variation, contact time and concentration of Pb2+ metal ions were 2.4154 mg/g, 14,89 mg/g and 15,1732 mg/g.
Sintesis dan Karakterisasi Magnetit (Fe3O4)-Kitosan sebagai Adsorben Ion Pb2+ Omri, Omri; Koesnarpadi, Soerja; Widodo, Nanang Tri
JURNAL ATOMIK Vol 10 No 2 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i2.1420

Abstract

Timbal merupakan logam berat yang umumnya banyak ditemukan pada lingkungan dan memiliki dampak negatif terhadap organisme pada tingkatan tropik. Dalam pengurangan kadar timbal, diperlukan solusi untuk mengatasi bahaya logam berat tersebut, salah satunya dengan metode adsorpsi menggunakan magnetit (Fe3O4)-kitosan. Pada penelitian ini, dilakukan sintesis magnetit (Fe3O4) termodifikasi kitosan dengan menggunakan metode kopresipitasi. Tujuan dari penelitian ini adalah untuk mengetahui karakteristik adsorben Fe3O4-kitosan dengan menggunakan Fourier Transform Infared (FT-IR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) dan VSM (Vibrating Sample Magnetometer), menentukan kondisi optimum adsorpsi berdasarkan variasi waktu pH, variasi waktu kontak dan variasi konsentrasi logam Pb2+ serta menentukan persen penyerapan dan kapasitas adsorpsi. Hasil karakterisasi FT-IR Fe3O4-kitosan menunjukkan adanya gugus Fe-O dan O-H dari Fe3O4 serta munculnya senyawa -NH. Analisa XRD diperoleh pola difraksi yang menunjukkan struktur kristal yang tajam. Analisa SEM Fe3O4-kitosan diperoleh morfologi permukaan berbentuk granul. Analisa VSM menunjukkan dan Fe3O4-kitosan bersifat superparamagnetik. Kondisi optimum adsorben Fe3O4-kitosan dalam mengadsorpsi ion Pb2+ berada pada pH 6 dengan waktu kontak 10 menit dan konsentrasi optimum 150 mg/L dengan kapasitas adsorpsi sebesar 63,62 mg/g.
Co-Authors Acmad Maulana Maulana Adhaina, Karina Alimuddin Aman Sentosa Panggabean Anuar, Hajar Aris Munandar Arsyakia, Tarisa Bohari Yusuf Budi Hastuti Daniel Tarigan Degirmenci, Volkan Djihan Ryn Pratiwi, Djihan Ryn Elen Reknosari Ersanto, Tri Edi Erwin - Eva Marliana, Eva Fatmawati, Ririn Anggraeni Fradita, Windiy Mira Hadi Nur Hairani, Rita Isyahro, Novia Rahmawati Lai, Sin Yuan Liana Sari, Ika Yekti Lianasari, Ika Yekti Mahyati, Agus Mukhamad Nurhadi, Mukhamad Nabila, Sahira Fara Nanang Tri Widodo Nanang Tri Widodo Nazarudin Nisa, Muflihatu Khoiratun Noor Hindryawati, Noor Omri, Omri Rahmawati, Rahmawati Reknosari, Elen Ruga, Ritbey Saptono Hadi, Saptono Teguh Wirawan Teguh Wirawan, Teguh Wirhanuddin, Wirhanuddin Yuniar Ponco Prananto