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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

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Chitosan Crosslinking from Clam Shells (Cerithidea obtusa) with Tripolyphosphate for Cadmium (II) Adsorption Koesnarpadi, Soerja; Anuar, Hajar; Widodo, Nanang Tri; Hastuti, Budi; Hadi, Saptono
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 2 (2024): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v9i2.80996

Abstract

The study investigates chitosan crosslinking from clam shells (Cerithidea obtusa) with tripolyphosphate for cadmium (II) adsorption. Chitosan was prepared by deacetylating chitin using 60% NaOH and heating at 140°C for 60 minutes. Chitin was isolated from Cerithidea obtusa shells, an abundant waste in East Kalimantan. Crosslinking of chitosan with tripolyphosphate was synthesized via gelation methods, dissolving 5 g of chitosan in acetic acid and adding 0.1% tripolyphosphate as a crosslinker. The chitosan-tripolyphosphate characterization was conducted using FTIR, XRD, and SEM. FTIR spectra revealed an N-H vibration at 1635 cm−1, NH3+ deformation at 1534 cm−1, C-O stretching at 1072 cm−1, and P-O vibration at 1026.91 cm−1, indicating the presence of tripolyphosphate in chitosan. The XRD pattern showed broad peaks at 19.85° and 23.50°, characteristic of amorphous chitosan-tripolyphosphate. SEM images depicted a flat sheet without pores and a tight surface. Cadmium (II) adsorption on chitosan-tripolyphosphate at an optimum pH of 4 followed a pseudo-second-order kinetic model. It adhered to the Langmuir isotherm model, with a maximum adsorption capacity of 27.8 mg/g. The results demonstrate that chitosan crosslinked with tripolyphosphate effectively for cadmium (II) adsorption.
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%.
KAJIAN LITERATUR PEMANFAATAN ADSORBEN KITOSAN TERMODIFIKASI ARANG AKTIF LIMBAH ORGANIK TERHADAP LOGAM BERAT Arsyakia, Tarisa; Koesnarpadi, Soerja; Lianasari, Ika Yekti
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

A literature review on the utilization of chitosan adsorbent modified organic waste activated charcoal against heavy metals has been conducted. From the results of the study, it was obtained that organic waste activated charcoal still has chemical content in the form of cellulose, lignin, hemicellulose, carboxymethyl cellulose ranging from 33.61-65,7%. The carbon compounds formed ranged from 66.60-86.4%. The organic waste activated charcoal used includes coffee grounds; tea grounds; teak wood powder; coconut shell; durian peel waste; pineapple peel waste; salak fruit seed waste; and rubber fruit shell. Activated charcoal is modified with chitosan to optimize pores, expand the surface, and increase adsorption power. The modification process is by mixing chitosan with a certain weight and dissolving it in 1-3% CH3COOH, then adding activated charcoal with a certain weight, stirring until a homogeneous gel is formed. Next, it was baked at 60ºC for 24 hours. The results formed were mixed into NaOH with a certain concentration, then washed with distilled water until neutral and stored in a desiccator. The chitosan - activated charcoal adsorbent was then contacted with heavy metals Arsenic (As); Lead (Pb); Cadmium (Cd); Copper (Cu); Zinc (Zn); and Iron (Fe). The results obtained percent absorption and adsorption capacity ranged from 85.32-99.992% and 0.1236-177.7035 mg/g. The values of percent absorption and adsorption capacity are influenced by the surface area, concentration, and adsorbent that needs to be activated. Keywords : Activated Charcoal, Chitosan, Modification, Heavy Metal
ADSORPSI ZAT WARNA METHYLENE BLUE MENGGUNAKAN ADSORBEN KOMPOSIT Fe3O4-ARANG AKTIF KULIT LAI [Durio Kutejensis (Hassk.)Becc.] Rahmawati, Rahmawati; Wirawan, Teguh; Koesnarpadi, Soerja
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Methylene blue is a synthetic dye commonly used in industry. Methylene blue is not very toxic to humans, but can cause skin irritation, eye irritation, and systemic effects including blood changes. This research aims to utilize lai bark activated charcoal composited with Fe3O4 as an adsorbent to adsorb methylene blue dye. Fe3O4-lai skin activated charcoal composite adsorbent was synthesized using the co-precipitation method from FeSO4.7H2O and FeCl3.6H2O then combined with lai skin activated charcoal. The Fe3O4-activated charcoal composite for skin was characterized using FTIR. The results of composite characterization using FTIR show that there is a wave number of 596.00 cm-1 which is the Fe-O group. The research results showed that the optimum conditions for the adsorption of methylene blue dye by the Fe3O4-activated charcoal composite adsorbent for lai skin were 60 minutes, pH 8, concentration 250 mg/L and following the Langmuir isotherm. The maximum adsorption capacity of Fe3O4-lai skin activated charcoal composite was 197.8792 mg/g. Keywords: Adsorption, Methylene Blue Dye, Composite, Lai Leather
Oxidation of Styrene to Benzaldehyde Using Environmentally Friendly Calcium Sulfate Hemihydrate-Supported Titania Catalysts Koesnarpadi, Soerja; Wirawan, Teguh; Nurhadi, Mukhamad; Wirhanuddin, Wirhanuddin; Prananto, Yuniar Ponco; Nazarudin, Nazarudin; Degirmenci, Volkan; Lai, Sin Yuan; Nur, Hadi
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 4 Year 2024 (December 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20224

Abstract

This paper presents the synthesis and characterization of calcium sulfate hemihydrate (CSH)-supported titania (TiO2) catalysts and their application in the environmentally friendly oxidation of styrene to benzaldehyde using hydrogen peroxide (H2O2) as the oxidant. The study explores the catalyst's structure-activity relationship, emphasizing the importance of mesoporous materials for enhanced catalytic performance. The CSH-Titania catalysts were synthesized using fish bone-derived CSH as a support, which aligns with green chemistry principles. Characterization techniques such as Fourier Transform Infra Red (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Brunauer-Emmett-Teller (BET) surface area analysis confirmed the successful impregnation of titania and its catalytic efficiency. The catalysts exhibited high selectivity for benzaldehyde, achieving up to 49.45% conversion of styrene, with benzaldehyde as being the main product. The research highlights that the catalyst’s performance decreased after calcination due to a reduced surface area and pore volume, yet it maintained recyclability across three cycles with minimal  lose  in selectivity loss. Overall, this study introduces a cost-effective and sustainable approach to styrene oxidation, demonstrating the potential for industrial application in producing high-value chemicals with minimal environmental impact. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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

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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

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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