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All Journal Jurnal Bahan Alam Terbarukan PROSIDING SEMINAR KIMIA Jurnal Kimia Mulawarman JURNAL ATOMIK Chemistry Indonesian Journal of Chemical Research JKPK (Jurnal Kimia dan Pendidikan Kimia) PRIMER: Jurnal Ilmiah Multidisiplin Journal of Science and Technology: Alpha
Nanang Tri Widodo
Jurusan Kimia Fakultas MIPA Universitas Brawijaya Jalan Veteran Malang 65145
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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

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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.
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)
Publisher : Jurusan Kimia FMIPA UNMUL

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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
MODIFICATION OF ADSORBEN SILICA FROM RICE HUSK ASH WITH CHITOSAN TO ADSORPTION ION MANGANESE (TOTAL) Fauzi, Akhmad; -, Alimuddin; Widodo, Nanang Tri
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Adsorbent silica from rice husk ash supported by chitosan can be used to adsorb Mn (Total) metal. The adsorbent is regulated by adjusting the composition of 65% silica and 35% chitosan. The characteristics of the silica-chitosan adsorbent and the adsorbent interaction with Mn (Total) are believed to be based on Fourier Transform Infared (FTIR) data. The concentration of Mn (Total) ion after adsorption is determined by Atomic Absorption Spectrophotometer (AAS). The results showed optimum pH at pH 5 percentage adsorption 79.45% and optimum contact time at 60 minutes with adsorption percentage 96.78%, and obtained chitosan-silica adsorption capacity of Mn (Total) ions of 1.0349 mg/g.
UTILIZATION OF Salvinia molesta AS Fe(II) AND Mn(II) ADSORBENTS Wiranata, Muhammad Harjan; Sitorus, Saibun; Widodo, Nanang Tri
JURNAL ATOMIK Vol 5 No 1 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Research on utilization of Kiambang powder (Salvinia molesta) as adsorbent Fe (II) and Mn (II) in artificial samples. The method used is adsorption with a modified activated adsorbent. From the results of the study obtained optimum conditions for adsorption of Fe (II) at pH of 4, time of 30 minutes and adsorption capacity of 0.158 mg/g. The optimum conditions for the adsorption of Mn metal ions at pH of 6, time of 60 minutes and adsorption capacity of 2.522 mg/g.
PENENTUAN STATUS MUTU AIR MENGGUNAKAN METODE INDEKS PENCEMARAN PADA SUNGAI SANGA-SANGA Rahmadi, Mohammad Zulfian; Sitorus, Saibun; Pagoray, Henny; 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.v10i1.1417

Abstract

Pencemaran Sungai Sanga-Sanga dapat disebabkan oleh buangan sektor pemukiman maupun sektor industri pertambangan Penggunaan indeks kualitas air dapat mempermudah penentuan kualitas air sungai serta mempermudah juga dalam pemberian informasi kepada pihak yang membutuhkan. Tujuan penelitian ini adalah untuk mengkaji kualitas air Sungai Sanga-Sanga ditinjau dari parameter fisika, kimia dan biologi serta menentukan status mutu Sungai Sanga-Sanga dengan metode Indeks Pencemaran. Penelitian ini merupakan penelitian deskriptif kuantitatif yang bersifat ex-post facto dengan menggunakan metode Indeks Pencemaran untuk menentukan status mutu air Sungai Sanga-Sanga. Status mutu air Sungai Sanga-Sanga berdasarkan Indeks Pencemaran berada pada kondisi tercemar ringan.
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%.
ADSORPSI ZAT WARNA DIREK HITAM MENGGUNAKAN ARANG AKTIF DARI MAHKOTA NANAS (Ananas comosus (L) Merr) TERMODIFIKASI KITOSAN Putri, Raisya Karina; Yusuf, Bohari; 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.v10i1.1433

Abstract

Consumption of pineapple fruit (Ananas comosus (L) Merr) results in solid waste of about 45-65%, especially the pineapple crown. On the other hand, the textile industry uses dyes such as recolors that can cause pollution in the aquatic environment. This study aims to use activated charcoal from chitosan-modified pineapple crown as an adsorbent for direct dyes. The steps taken are characterizing activated charcoal, chitosan and chitosan-modified activated charcoal using Fourier Transform Infrared (FT-IR) and Scanning Electron Microscopy (SEM), optimizing with variations in mass, contact time and pH, and determining the maximum adsorption capacity. Preparation of pineapple crown activated charcoal carbonated at 400oC for 1 hour. Activated using 2% NaOH and then modified with chitosan. The chitosan-modified pineapple crown activated charcoal was used to adsorb the dye direct black and analyzed using a UV-Vis spectrophotometer. The results of FT-IR characterization of pineapple crown activated charcoal, chitosan and chitosan-modified pineapple crown activated charcoal indicated the presence of O-H, C-H (stretching), C=O and C-H (bending) groups, and in chitosan and chitosan-modified activated charcoal also indicated the appearance of overlapping N-H (amine), C-N (amide) and C-O-C groups. The results of SEM characterization of pineapple crown activated charcoal show that the surface has a smooth texture, chitosan has a rough and irregular texture surface and chitosan-modified pineapple crown activated charcoal has small clumps of various sizes and shapes. The results of the optimum conditions of adsorption of chitosan-modified pineapple crown activated charcoal on black rec dye occurred at a mass of 0.25 grams, contact time for 20 minutes and pH 7 with a maximum adsorption capacity of 11,6472 mg/g following the Langmuir isotherm.
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 Ahmad, Atika Aulia Akhmad Fauzi Alimuddin Alimuddin Aman Sentosa Panggabean Anuar, Hajar Arief, M. Syaiful Arisa, Putri Azizah, Siti Halimatuz Zahroh Bohari Yusuf Budi Hastuti Djihan Ryn Pratiwi, Djihan Ryn Eva Marliana, Eva Gaanty Pragas Maniam, Gaanty Pragas Henny Pagoray, Henny Hiyahara, Irfan Ashari Husna Syaima Isyahro, Novia Rahmawati Juliani, Okti Nabila, Sahira Fara Noor Hindryawati, Noor Nurfarizha, Harisma Oktavia, Dwina Putri Omri, Omri Putri, Raisya Karina Rahmadi, Mohammad Zulfian Ramadani, Desi Fidyah Saibun Sitorus Saptono Hadi, Saptono Sari, Ika Yekti Liana Soerja Koesnarpadi Subur P Pasaribu Teguh Wirawan, Teguh Wiranata, Muhammad Harjan