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All Journal SAINS DAN MATEMATIKA JURNAL KIMIA SAINS DAN APLIKASI Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Pendidikan Bahasa Molekul: Jurnal Ilmiah Kimia Greensphere: Journal of Environmental Chemistry Jurnal Pengabdian Kolaborasi dan Inovasi IPTEKS Molekul: Jurnal Ilmiah Kimia Bulletin of Chemical Reaction Engineering & Catalysis

Arnelli Arnelli

Chemistry Department, Faculty Of Sciences And Mathematics, Diponegoro University Jl. Profesor Soedharto, S.H. Tembalang, Semarang, Central Java, Indonesia 50275

Author-ID : 233689

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Social Sciences

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Pengaktifan Kapas Sebagai Resin Penukar Kation Asam Lemah Arnelli, Arnelli; S., M. S.H. Yoga; Astuti, Yayuk
JURNAL SAINS DAN MATEMATIKA Volume 14 issue 4 Year 2006
Publisher : JURNAL SAINS DAN MATEMATIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (404.561 KB)

ABSTRAK---Dengan menggunakan beberapa reaksi kimia, gugus hidroksi dalam struktur selulosa mampu diubah menjadi senyawa eter (R-O-R). Senyawa eter yang disintesis tersebut mengandung gugus karboksilat yang mempunyai kation aktif yang dapat dipertukarkan dengan kation lain. Sebagai sumber selulosa adalah kapas alam. Pada penelitian ini, kapas alam diaktifkan dengan NaOH dan asam trikloroasetat sehingga menghasilkan senyawa eter selulosa. Pemanfatannya sebagai penukar kation dilakukan terhadap kation Cu. Hasil penelitian menunjukkan bahwa kondisi pengaktifan yang memberikan kapasitas adsorbsi optimum adalah pada suhu alkalisasi 60 0C, lama reaksi 120 menit dan konsentrasi asam trikloroasetat sebesar 0.06 M. pada kondisi pengaktifan ini kapas aktif mampu mengadsorbsi kation tembaga 44.10-2 mg/g kapas aktif. Â Kata kunci: kapas aktif, trikloroasetat, penukar kation

Modifikasi Zeolit Alam untuk Adsorben Arnelli, Arnelli; Arthono, Thonang
Jurnal Kimia Sains dan Aplikasi Vol 5, No 1 (2002): Volume 5 Issue 1 Year 2002
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Modifikasi zeolit alam telah dilakukan untuk mendapatkan material yang lebih aktif dan baik untuk digunakan sebagai adsorben. Adsorbat yang telah diperlakukan dengan zeolit aktif tersebut adalah anion ( NO3-; NO2-; CN-; Cl- dan SO42-) dan senyawa organik (Na Asetat, O-kreseol, Asam asetat dan pati). Hasil penelitian memperlihatkan bahwa untuk memperoleh zeolit yang dapat menyerap anion perlu kalsinasi pada suhu 550Â°C dan untuk menyerap senyawa organik, kalsinasi hanya pada suhu 300Â°C. Proses adsorpsi dipengaruhi oleh jenis adsorben dan adsorbat.

Manfaat Surfaktan dalam Proses Pewarnaan Tekstil Arnelli, Arnelli; Nugraheni, Wahyu Widi
Jurnal Kimia Sains dan Aplikasi Vol 6, No 2 (2003): Volume 6 Issue 2 Year 2003
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

ABS (Alkil Benzen Sulfonat) telah digunakan dalam proses pewarnaan serat poliester dengan zat warna dispersi. ABS berfungsi untuk membantu penyebaran zat warna pada serat sehingga dihasilkan warna yang merata pada kain.Prinsip yang digunakan pada proses ini adalah solubilisasi, surfaktan dapat melarutkan zat organik, pelarutan ini terjadi dalam misel, selanjutnya misel akan teradsorpsi pada permukaan kain dan zat warna dapat berpenetrasi pada kain.Hasil penelitian menunjukkan bahwa ABS lebih baik digunakan dalam proses pewarnaan dari zat pembantu standard DPLSNKata kunci: Surfaktan, pewarnaan, solubilisasi

Perbaikan Mutu Fraksi Kerosin Melalui Proses Adsorpsi oleh Karbon Aktif Arnelli, Arnelli; Hanani, Asti
Jurnal Kimia Sains dan Aplikasi Vol 9, No 2 (2006): Volume 9 Issue 2 Year 2006
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Proses adsorpi menggunakan karbon aktif telah digunakan untuk mengurangi kandungan senyawa sulfur dan meningkatkan kualitas warna pada fraksi kerosin. Hasil penelitian menunjukkan bahwa berat karbon aktif dan waktu kontak optimum pada proses adsorpsi adalah 150 gram dan 80 menit dengan pengurangan kandungan sulfur 32,2 % sedangkan kualitas warna meningkat 87,5 % dengan demikian proses adsorpsi oleh karbon aktif lebih efektif dalam meningkatkan kualitas warna fraksi kerosin.Kata kunci: Adsorpsi, karbon aktif, fraksi kerosin

Kegunaan Zeolit Termodifikasi sebagai Penyerap Anion Arnelli, Arnelli; Hermawati, Lucia; Ismaryata, Ismaryata
Jurnal Kimia Sains dan Aplikasi Vol 2, No 2 (1999): Volume 2 Issue 2 Year 1999
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Telah dilakukan penelitian tentang kegunaan zeolit alam yang dimodifikasi untuk penyerap anion dengan tujuan untuk mempelajari alternatif lain penggunaan zeolit selain sebagai penukar kation. Zeolit alam terlebih dahulu dimodifikasi dengan cara mencuci dengan asam dan dipanaskan, kemudian direndam di dalam larutan NH4NO3 dan dikalsinasi pada suhu 550Â°C, zeolit ini siap digunakan sebagai penyerap anion (Cl-, NO2-, NO3- dan CN-). Hasil penelitian menunjukkan bahwa Cl-, NO2-, NO3- dan CN- yang terserap masing-masing adalah 75%, 78%, 77% dan 81%. Kesimpulan dari penelitian ini adalah zeolit hasil modifikasi dapat digunakan untuk penyerap anion

French Fries-Like Bismuth Oxide: Physicochemical Properties, Electrical Conductivity and Photocatalytic Activity Yayuk Astuti; Fauzan Musthafa; Arnelli Arnelli; Iis Nurhasanah
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 1 Year 2022 (March 2022)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.1.12554.146-156

Bismuth oxide synthesis using hydrothermal method has been conducted. This study aims to examine the effect of the hydrothermal reaction time on product characteristics and photocatalytic activity in degrading methyl orange dye. Bismuth oxide synthesis was initiated by dissolving bismuth nitrate pentahydrate (Bi(NO3)3.5H2O) and Na2SO4 in a distilled water and added NaOH gradually. The solution formed was transferred into a Teflon-lined autoclave and heated at 120 °C with time variations of 8–16 h. The formation of bismuth oxide was indicated by the vibrations of the Bi−O−Bi and Bi−O groups and the crystal structure consisting of a-Bi2O3, β-Bi2O3, and g-Bi2O3. In addition, the highest photocatalytic activity can be examined through several factors, such as: content of Bi−O−Bi and Bi−OH groups, crystal structure, band gap values, morphology, and surface area, acquired as a result of the effect of hydrothermal reaction time. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Studying Impact of Different Precipitating Agents on Crystal Structure, Morphology and Photocatalytic Activity of Bismuth Oxide Yayuk Astuti; Arnelli Arnelli; Pardoyo Pardoyo; Amilia Fauziyah; Siti Nurhayati; Arum Dista Wulansari; Rizka Andianingrum; Hendri Widiyandari; Gaurav A. Bhaduri
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 3 Year 2017 (December 2017)
Publisher : Department of Chemical Engineering - Diponegoro University

Bismuth oxide (Bi2O3) is a well-studied photocatalyst for degradation of various environmental contaminants. In this research Bi2O3 has been synthesized by precipitation method using two different bases (NH4OH and NaOH). The samples thus obtained were then analyzed using FTIR, XRD, and SEM for surface functionalization, crystal structures and morphological differences, respectively. The Bi2O3 precipitated using NH4OH showed a flower like structure made up of individual plates having α-Bi2O3 crystal structure. The precipitate obtained using NaOH showed a honeycomb like flower structure with a mixture of both α-Bi2O3 and γ-Bi2O3 crystal structure. Degradation of methyl orange (MO) was used as a model system to test the photocatalytic activity of the bismuth oxide. The Bi2O3 synthesized using NH4OH showed superior photocatalytic degradation of methyl orange than the one synthesized using NaOH.

LiOH/Coconut Shell Activated Carbon Ratio Effect on the Electrical Conductivity of Lithium Ion Battery Anode Active Material Annisa Syifaurrahma; Arnelli Arnelli; Yayuk Astuti
Molekul Vol 16, No 3 (2021)
Publisher : Universitas Jenderal Soedirman

A lithium ion battery anode active material comprised of LiOH (Li) and coconut shell activated carbon (AC) has been synthesized with Li/AC ratios of (w/w) 1/1, 2/1, 3/1, and 4/1 through the sol gel method. The present study aims to ascertain the best Li/AC ratio that produces an anode active material with the best electrical conductivity value and determine the characteristics of the anode active material in terms of functional groups, surface area, crystallinity, and capacity. Based on the electrical conductivity test using LCR, the active material Li/AC 2/1 had the highest electrical conductivity with a value of 2.064x10-3 Sm-1. The conductivity achieved was slightly smaller than that of the active material with no addition of LiOH on the activated carbon at an electrical conductivity of 5.434x10-3 Sm-1. The FTIR spectra of the activated carbon and Li/AC 2/1 showed differences with in the Li-O-C group absorption at 1075 cm-1 wavenumber and the wide absorption in the area of 547.5 cm-1 that represents Li-O vibration. Based on the results of SAA, the activated carbon had a larger surface area than Li/AC 2/1 at 17.057 m2g-1 and 5.615 m2g-1, respectively. The crystallinity of both active materials was low shown by the widening of the diffraction peaks. Tests with cyclic voltammetry (CV) proved that there was a reduction-oxidation reaction for the two samples in the first cycle with a large charge and discharge capacities of the activated carbon of 150.989 mAh and 92.040 mAh, while for Li/AC 2/1 they were 91.103 mAh and 47.580 mAh.

Pengayaan Yodium dan Kadar NaCl pada Garam Krosok menjadi Garam Konsumsi standar SNI Enrichment of Iodium and Sodium Cloride in the Traditional Salt become Consumtion Salt INS Standard M. Nur; I. Marhaendrajaya; Sugito Sugito; T. Windarti; Arnelli Arnelli; R. Hastuti; A. Haris; W. H. Rahmanto; Didik Setiyo Widodo; F. Ariyanto; Z. Muhlisin; J. E. Suseno; E. Setiawati; H. Sutanto; Priyono Priyono; M. Izzati; R. Hariyati; S. Tana; B. Raharjo; D. Ispriyanti; Farikhin Farikhin; A. Rusgiyono; Suhartono Suhartono
JURNAL SAINS DAN MATEMATIKA Volume 21 Issue 1 Year 2013
Publisher : JURNAL SAINS DAN MATEMATIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3994.464 KB)

This research has been carried out in the quality improvement of traditional salt (krosok salt) into salt consumption for the Indonesian National Standard. This report is devoted to the elevated levels of NaCl and KIO3. Increased levels of NaCl and Iodine (represented by KIO3) is done by washing the salt with the traditional clothes washer with two rounds and by using water with saline solution at 22-24 Be (known as the old water). Traditional salt taken from three districts, such as Pati District, Jepara District, and Rembang District. We found that the concentration of NaCl in the treatment salt maximum is 96 % and Iodium or present of KIO3 is 40 ppm. Key words: Salt, traditional, INS, Consumtion, NaCl, KIO3

Synthesis of Surfactant-Modified Activated Carbon (SMAC) Above Critical Micelle Concentration as Cr(VI) Ion Adsorbent Arnelli Arnelli; Sri Guswini; Ahmad Suseno
Jurnal Kimia Sains dan Aplikasi Vol 25, No 5 (2022): Volume 25 Issue 5 Year 2022
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

The synthesis of surfactant-modified activated carbon (SMAC) has been widely studied. However, no research has been conducted to study SMAC concentrations higher than the critical micellar concentration. Therefore, in this study, SMAC was synthesized using anionic and cationic surfactants above CMC (Critical Micelle Concentration) and compared with SMAC below CMC and coconut husk-based activated carbon. This study aimed to determine the surface profile of SMAC and the characteristics and mechanism of metal ion adsorption by SMAC. The selected metal ions were Cr(VI) cations and NH4+ cations as a reference. SMAC was prepared by modifying coconut shell-based activated carbon with anionic surfactant SLS (Sodium Lauryl Sulfate) and cationic surfactant HDTMA-Br (Hexadecyl Trimethyl Ammonium Bromide). Modification of SMAC was performed by three different methods: (a) activated carbon was added gradually with SLS followed by HDTMA-Br, (b) activated carbon was added with HDTMA-Br followed by SLS, (c) activated carbon was mixed with SLS and HDTMA-Br simultaneously. All synthesized SMAC were characterized using FTIR, GSA (Gas Sorption Analyzer), and zeta potential. The FTIR analysis results showed that the synthesized SMAC comprised S=O and (CH3)3N+ groups derived from surfactants. GSA analysis revealed that SMAC has a surface area of 36.790 m2/g, and it was more stable than activated carbon according to the zeta potential result. In this study, the efficiency of SLS and HDTMA-Br in synthesizing SMAC was 99.98% and 95.85%, respectively. SMAC synthesis using method c resulted in Cr(VI) adsorption efficiency of 93.50% and NH4+ adsorption efficiency of 87.37%. In comparison, SMAC below CMC has adsorption capacities of 93.41% for Cr(VI) and 85.05% for NH4+, respectively, whereas Cr(VI) adsorption efficiency by coconut shell-based activated carbon was 99.98%.

Co-Authors A. Haris A. Rusgiyono Ahmad Suseno Alfiansyah Alfiansyah Amilia Fauziyah Anisyah Anisyah Annisa Syifaurrahma Arthono, Thonang Arum Dista Wulansari B. Raharjo Bara Yunianto Fathoni Briyanto Briyanto Chandra Ady Nugroho Chandra, Yopie D. Ispriyanti Didik Setiyo Widodo Diyan Arini E. Setiawati Endah Wulan Juni F. Ariyanto Fahmi Syafaat Fandi Nasrun Cholis Fauzan Musthafa Fitriani Solichah Galih N. R. Pargiman Gaurav A. Bhaduri H. Sutanto Hanani, Asti Hanna Niela Diana Hendri Widiyandari Hermawati, Lucia I. Marhaendrajaya Iis Nurhasanah Ismaryata, Ismaryata J. E. Suseno Juwanda, Farikhin M. Izzati M. Nur M. S.H. Yoga S. Mardiana, Harisa Mariza Umi Darmayanti Narita Rizki Ngadiwiyana M.Si. S.Si. Noor Afifah Nugraheni, Wahyu Widi Pardoyo Pardoyo Pardoyo Pardoyo Priyono Priyono Pungki Hanipa Puspitasari Puspitasari R. Hariyati R. Hastuti Rahayu, R.A. Yunita Suci Rahmatul Fazira Rizka Andianingrum Rohayati Juita S. Tana Siti Fatimah Siti Nurhayati Sri Guswini Sriatun Sriatun Sugito Sugito Suhartono Suhartono T. Windarti Taslimah Taslimah Teguh Iman Prastyo Tri Windarti Ulya Hanifah Henrika Putri W. H. Rahmanto Yayuk Astuti Yeni Aprilia Yusniati Yusniati Z. Muhlisin

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