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All Journal Jurnal Bahan Alam Terbarukan PROSIDING SEMINAR KIMIA Jurnal Kimia Mulawarman JURNAL ATOMIK Chemistry Indonesian Journal of Chemical Research Jurnal Abdimas Mahakam Acta Chimica Asiana Molekul: Jurnal Ilmiah Kimia Bulletin of Chemical Reaction Engineering & Catalysis
Teguh Wirawan, Teguh
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 Materials Science & Nanotechnology Public Health Social Sciences

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ELEKTRODELOKALISASI ZAT WARNA LIMBAH CAIR SARUNG TENUN SAMARINDA MENGGUNAKAN ELEKTRODA PbO2/Cu Menono, Fera Friskaneke; Wirawan, Teguh; Panggabean, Aman Sentosa
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1361

Abstract

Electrodecolorization of Sarung Tenun Samarinda liquid waste dyestuff using PbO2/Cu electrode has been conducted. This study aims to reduce the level of dyes in Sarung Tenun Samarinda liquid waste samples by electrodecolorization method using lead dioxide (PbO2) electrode as anode and Copper (Cu) as cathode. Electrodecolorization was carried out by varying the working potential, Na2SO4 electrolyte concentration, time, and dye concentration in order to obtain optimum conditions for dye decolorization by electrolysis process. The concentration of the dye was determined by calculating the absorbance data obtained from measurements using a UV-Vis spectrophotometer. The results showed that the optimum conditions of electrodecolorization on orange dyes using PbO2/Cu electrodes were a working potential of 10.5 volts, 0.2 M Na2SO4 electrolyte concentration and a time of 20 minutes. In green dyes, the optimum conditions are working potential of 10.5 volts, electrolyte concentration of Na2SO4 0.1 M and time for 15 minutes. The percentage of decolorization of the orange Sarung Tenun Samarinda liquid waste sample using the PbO2/Cu electrode was 100% and in the green Sarung Tenun Samarinda liquid waste sample was 100%.
Adsorpsi Fenol oleh Arang Aktif Ampas Kopi Teraktivasi Fisik dan Kimia Nurfarizha, Harisma; Wirawan, Teguh; Widodo, Nanang Tri
JURNAL ATOMIK Vol 6 No 2 (2021)
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Abstract

Activated charcoal was prepared from coffee grounds using carbonization at 500⁰C as a physical activation and also by chemical activation using sulphuric acid. Chemical characterization of the activated charcoal was performed by Fourier Transform Infrared Spectroscopy. The optimum conditions for phenol adsorption was attained at pH 4 and 60 minutes of contact time. Adsorption isotherms from Freundlich
ADSORPSI ZAT WARNA TEKSTIL UNGU DARI AIR LIMBAH INDUSTRI RUMAH TANGGA SARUNG TENUN SAMARINDA SEBERANG DENGAN MENGGUNAKAN SERBUK KULIT BUAH LAI (DURIO KUTEJENSIS (HASSK.) BECC.) Oliviani, Nadira; Wirawan, Teguh; Sitorus, Saibun
JURNAL ATOMIK Vol 8 No 2 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Pewarna tekstil termasuk senyawa yang sulit terurai secara alami, sehingga dapat berdampak negatif terhadap lingkungan perairan. Penelitian ini bertujuan untuk memanfaatkan kulit buah lai yang dibuat menjadi serbuk sebagai adsorben untuk menyerap zat warna tekstil ungu pada air limbah sarung tenun Samarinda Seberang. Tahap pertama dibuat dengan membilas bubuk kulit buah lai dengan air suling mendidih, kemudian dipanggang dan diayak dengan ayakan 60 mesh. Karakterisasi dilakukan dengan menggunakan Fourier Transform Infared (FTIR) dan Scanning Electron Microscopy (SEM). Kajian adsorpsi zat warna tekstil ungu oleh serbuk kulit buah lai dilakukan dengan variasi waktu, pH dan konsentrasi. Hasil karakterisasi dengan FTIR menunjukkan adanya CO, CH bending, C=C, C=O, CC alkena,Gugus CH dan berdasarkan hasil karakterisasi SEM serbuk cangkang lainnya memiliki permukaan yang berpori. Kondisi optimum adsorpsi zat warna tekstil ungu 100 ppm untuk 25 mL dengan berat adsorben 0,01 g terjadi pada waktu kontak 2,5 menit dan pH 9. Adsorpsi zat warna tekstil ungu mengikuti pola adsorpsi isoterm Langmuir dan memiliki kapasitas adsorpsi maksimum sebesar 1176 .0486 mg/g. Aplikasi pada sampel air limbah sarung tenun ungu Samarinda Seberang dengan konsentrasi 143,5 ppm sebanyak 25 mL dan menggunakan berat optimum 0,01 g, waktu 2,5 menit dan pH 9 diperoleh %Adsorpsi sebesar 72,0119%. 5 menit dan pH 9. Adsorpsi zat warna tekstil ungu mengikuti pola adsorpsi isoterm Langmuir dan memiliki kapasitas adsorpsi maksimum sebesar 1176 .0486 mg/g.Aplikasi pada sampel air limbah sarung tenun ungu Samarinda Seberang dengan konsentrasi 143,5 ppm sebanyak 25 mL dan menggunakan berat optimum 0,01 g, waktu 2,5 menit dan pH 9 diperoleh %Adsorpsi sebesar 72,0119%. 5 menit dan pH 9. Adsorpsi zat warna tekstil ungu mengikuti pola adsorpsi isoterm Langmuir dan memiliki kapasitas adsorpsi maksimum sebesar 1176 .0486 mg/g. Aplikasi pada sampel air limbah sarung tenun ungu Samarinda Seberang dengan konsentrasi 143,5 ppm sebanyak 25 mL dan menggunakan berat optimum 0,01 g, waktu 2,5 menit dan pH 9 diperoleh %Adsorpsi sebesar 72,0119%.
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

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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
Adsorption Of Dye From Household Industrial Wastewater Of Samarinda Seberang Weaving Gloves Using Adsorbent From Activated Charcoal Lai Fruit Powder (Durio Kutejensis (Hassk.) Becc.) Sari, Riska Alif Kartika; Wirawan, Teguh; Sitorus, Saibun
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1271

Abstract

Textile dyes include compounds that are difficult to decompose naturally. In the waters is a serious environmental problem because it can have a negative impact. This study aims to utilize lai fruit peel which is used as activated charcoal as an adsorbent to adsorb purple dyes in woven sarong waste water. The first stage of making activated charcoal is through carbonation in a furnace at 500oC for 30 minutes. Activation was carried out chemically by immersing it in 2 M H2SO4 solution for 24 hours. FTIR characterization of the resulting activated carbon was carried out to determine its functional groups and SEM characterization to determine its morphology. The results of FTIR characterization of activated carbon from lai fruit peel powder have functional groups -CO- and –OH, while SEM characterization of activated carbon from lai fruit peel powder is in the form of fibers with open pore surfaces that are spread on the surface and cavity walls of the activated charcoal of lai fruit peel powder. The adsorption process was carried out using the bath method and the concentration of the purple dye was determined using a UV-Vis spectrophotometer. The results showed that the adsorption of purple dye by activated charcoal was optimal at contact time of 1 minute and at pH 8. Adsorption of purple dye followed by the Freundlich adsorption pattern and had a maximum chemical adsorption capacity of 55.209 mg/g.
ADSORPSI ZAT WARNA RHODAMINE B MENGGUNAKAN SERBUK KULIT BUAH LAI (Durio kutejensis (Hassk.) Becc.) SEBAGAI ADSORBEN Sam, Risna Fitriani; Wirawan, Teguh; Aziz, Abdul
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.v9i2.1414

Abstract

Rhodamine B dye, which is widely used in the textile industry, has the potential to reduce environmental quality because it is difficult to decompose and makes it a toxic substance. Therefore, textile industry waste must be processed first before being released into the environment, for example through an adsorption process. In this research, the adsorbent was made from Lai fruit peel powder and the optimum conditions and performance of the adsorbent were determined based on the optimum pH, optimum time, adsorption capacity, type of isotherm (Langmuir or Freundlich), and adsorption thermodynamics. The adsorbent was made by washing the lai fruit peel powder repeatedly using boiling distilled water until the filtrate was colorless, then heating, crushing and sifting with a 60 mesh sieve. Lai fruit peel powder was chemically activated by soaking in 2 M HCl solution for 24 hours. The FT-IR spectrum of Lai fruit peel powder shows the presence of C-O, C=C, C-H, and O-H stretching vibration groups. Based on Scanning Electron Microscopy (SEM), activated lai fruit peel powder shows more open pores. The absorption value was determined using a UV-Vis spectrophotometer. The optimum conditions for adsorption of rhodamine B dye occur at pH 5, contact time 75 minutes, maximum adsorption capacity of 118.5422 mg/g following the Freundlich isotherm adsorption pattern and adsorption occurs physically.
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%.
PHYTOCHEMICAL TEST AND ANTIBACTERIAL ACTIVITY OF METHANOL EXTRACT OF Melicope lunu-ankenda (Gaertn.) T.G. Hartley STEM AGAINST Salmonella typhi AND Staphylococcus aureus Hermawan, Hermawan; Wirawan, Teguh; Pratiwi, Djihan Ryn
JURNAL ATOMIK Vol 6 No 1 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Phytochemical test and antibacterial activity of methanol extract of Melicope lunu-ankenda (Gaertn.) T.G. Hartley have been done. The extraction of Melicope lunu-ankenda (Gaertn.) T.G. Hartley stem sample was carried out by the maceration method using methanol as a solvent. An antibacterial activity test was carried out using the agar diffusion method. Phytochemical tests results showed that methanol extract of Melicope lunu-ankenda (Gaertn.) T.G. Hartley stem has secondary metabolites including alkaloids, steroids, triterpenoids, and quinones. The antibacterial activity test results obtained MIC values for Salmonella typhi bacteria of 1.25% and for Staphylococcus aureus bacteria of 0.625%. Methanol extract of Melicope lunu-ankenda (Gaertn.) T.G. Hartley stem has broad-spectrum antibacterial activity.
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.
ELEKTRODEKOLORISASI LIMBAH CAIR INDUSTRI SARUNG TENUN SAMARINDA MENGGUNAKAN ELEKTRODA PbO2/Pb DARI AKI BEKAS Ramadani, Desi Fidyah; Wirawan, Teguh; Widodo, Nanang Tri
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.v10i1.1413

Abstract

Electrodecolorization of liquid waste from the Samarinda woven sarong industry using PbO2/Pb electrode has been conducted. The purpose of this study was to decolorize woven sarong wastewater samples using the electrodecolorization method using lead dioxide (PbO2) as the anode and lead (Pb) as the cathode. Electrodecolorization is carried out by varying working potential, Na2SO4 electrolyte concentration, time and electrode distance. The dye concentration was determined using a UV-Vis spectrophotometer. The research results showed that the optimum conditions for electrodecolorization of woven sarong wastewater samples were using PbO2/Pb electrodes, namely with a working potential of 6 volts, a Na2SO4 electrolyte concentration of 0.25 M, a time of 60 minutes, and a distance of 1 cm. The percentage of decolorization of Samarinda woven sarong wastewater samples using PbO2/Pb electrodes, at maximum conditions was 98,75%.
Co-Authors Abdul Aziz Agusti, Nabila Nur Ahmad, Atika Aulia Aman Sentosa Panggabean Ananda, Azizah Fithri Arief, M. Syaiful Arisa, Putri Aulia, Erfah Sasmita Degirmenci, Volkan Djihan Ryn Pratiwi, Djihan Ryn Ersanto, Tri Edi Eva Marliana, Eva Fatmawati, Ririn Anggraeni Fradita, Windiy Mira Gaanty Pragas Maniam, Gaanty Pragas Hadi Nur Hairani, Rita Hermawan Hermawan Hiyahara, Irfan Ashari Husna Syaima Juliani, Okti Lai, Sin Yuan Menono, Fera Friskaneke Mukhamad Nurhadi, Mukhamad Mulyana Mulyana Mulyana Mulyana Nanang Tri Widodo Nazarudin Noor Hindryawati, Noor Nurfarizha, Harisma Oliviani, Nadira Rahmadani, Agung Rahmawati, Rahmawati Ramadani, Desi Fidyah Reknosari, Elen Ruga, Ritbey Saibun Sitorus Sam, Risna Fitriani Sari, Riska Alif Kartika Soerja Koesnarpadi Subur P Pasaribu Sujito Sujito Wirhanuddin, Wirhanuddin Yulieta, Afifah Nur Yuniar Ponco Prananto