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All Journal SAINS DAN MATEMATIKA JURNAL KIMIA SAINS DAN APLIKASI 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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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

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%.

Modification of Activated Carbon from Rice Husk using Hexadecyltrimethylammonium Bromide (HDTMA-Br) Surfactant and ZnCl2 activator and Microwaves for Nitrate Ion Adsorption Yeni Aprilia; Arnelli Arnelli; Yayuk Astuti
Jurnal Kimia Sains dan Aplikasi Vol 23, No 11 (2020): Volume 23 Issue 11 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Surfactant Modified Activated Carbon (SMAC) is a surfactant-modified activated carbon product. The surfactant used in this study was the cationic surfactant Hexadecyltrimethylammonium Bromide (HDTMA-Br). These surfactants can change the activated carbon's surface to be positively charged due to the presence of the surfactant hydrophilic groups. This SMAC is more selective in absorbing anions, which in this study is for the adsorption of nitrate anions. This research aims to prepare a new material that is superior to activated carbon in absorbing nitrate anions. This research was conducted in several stages. In the first stage, rice husk was carbonized through pyrolysis at 300°C for 10 minutes. In the second stage, carbon was activated using 30% ZnCl2 and microwaves for 5 minutes and 400 W. The third stage was modifying activated carbon by contacting or adsorbing HDTMA-Br on activated carbon. The concentration of HDTMA-Br varied at 200-400 ppm and the adsorption time was 3-7 hours. The success of the modification was measured by the efficiency of HDTMA-Br in modifying activated carbon. This is supported by the results of the characterization of FTIR, GSA, SEM, and thermodynamic parameters. The resulting SMAC was applied for the adsorption of nitrate anions, and the results were compared to carbon and activated carbon. The results indicate that the best SMAC is formed at an optimum concentration of 300 ppm, within 4 hours, with an adsorption efficiency of 97.345%. The characterization results also show that SMAC has been formed, as evidenced by the presence of a peak at a wavenumber of about 1500 cm-1, a C-N group derived from N(CH3)3 in the HDTMA-Br surfactant structure. The SMAC spectra also appeared weak peaks at the wave number 2918 cm-1, which indicated the CH2-R group stretching from the HDTMA-Br surfactant. SEM image shows that HDTMA-Br has covered the pores of activated carbon. Meanwhile, the SMAC surface area is lower than that of activated carbon. Thermodynamic parameters indicate that HDTMA-Br interacts physically with activated carbon. The adsorption capacity of nitrate anion by SMAC is 3,638 mg/g, higher than carbon and activated carbon.

Synthesis of Sodium Lauryl Sulfate (SLS) and Hexadecyltrimethylammonium Bromide (HDTMA-Br) Surfactant-Modified Activated Carbon as Adsorbent for Pb2+ and NO3- Arnelli Arnelli; Rahmatul Fazira; Yayuk Astuti; Ahmad Suseno
Jurnal Kimia Sains dan Aplikasi Vol 23, No 11 (2020): Volume 23 Issue 11 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

The adsorption efficiency and selectivity of activated carbon as an adsorbent for ions can be improved. One way is to convert activated carbon into surfactant modified activated carbon (SMAC). The surfactants used in this study were the anionic surfactant Sodium Lauryl Sulfate (SLS) and the cationic surfactant hexadecyltrimethylammonium bromide (HDTMA-Br). This research aims to synthesize SMAC to obtain a material with a surface charge and absorb ions better than activated carbon. This research consisted of four stages. The first step was the carbonization of rice husks using a pyrolysis reactor at 400°C for 1 hour. The second stage was carbon activation using 30% ZnCl2 and microwave radiation for 5 minutes and 400 W. The third stage was the modification of activated carbon and characterization by FTIR, SEM, SAA. The fourth stage was the adsorption of Pb cations and nitrate anions by carbon, activated carbon, and SMAC. Several variables were applied, such as the type of surfactant, time, and method of modification. There are three ways of modification: (1) method A, in which activated carbon is brought into contact with SLS then HDTMA-Br. (2) Method B in which activated carbon was contacted with HDTMA-Br then SLS. (3) Method C in which activated carbon was brought into contact with SLS together with HDTMA-Br. All variables were investigated. The results showed that the optimum time for making SMAC for both surfactants was 4 hours, the optimum concentrations of SLS and HDTMA-Br were 60 and 300 ppm, respectively. SMAC made by the C method was the most effective at adsorbing Pb2+ and NO3- with adsorption capacities of 1.376 and 0.896 mg/g, respectively. The success of SMAC synthesis was evidenced by the S=O and (CH3)3N+ groups in the FTIR spectra. The SMAC surface area is smaller than activated carbon, 14.472 m2/g, but the surface morphology is smoother and more homogeneous.

Use of Microwave Radiation for Activating Carbon from Rice Husk Using ZnCl2 Activator Arnelli Arnelli; Ulya Hanifah Henrika Putri; Fandi Nasrun Cholis; Yayuk Astuti
Jurnal Kimia Sains dan Aplikasi Vol 22, No 6 (2019): Volume 22 Issue 6 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Activated carbon is one of the most commonly used adsorbents in a variety of separation processes because it is inexpensive, and also the design and principal of application are quite simple. The ability of activated carbon as an adsorbent is related to its large surface area and pore volume, varying pore structure, and diverse surface reactivity. The use of microwave radiation can further improve the efficiency of activated carbon adsorption. Micro-waves can affect the pore texture and surface of the activated carbon, but rarely do both practitioners and researchers control these variables influencing the relationship between features and performance of biomass-based activated carbon as an adsorbent at the time of manufacture from the initial stage (carbonation) to carbon application active (e.g., adsorption of heavy metals, surfactants, and organic molecules). This study aims to synthesize activated carbon from rice husk, which has the efficiency and capacity of adsorption of heavy metals such as Pb and activator organic molecules used is ZnCl2 30% and microwave radiation. This research has succeeded in making activated carbon using the ZnCl2 activator and microwave radiation. The time and power of microwave radiation that provides the highest efficiency in the carbon activation process for Pb ion adsorbate, were 7 minutes and 800 W. For phenol adsorbate was 5 minutes at 800 W. The highest efficiency time and concentration of adsorption for Pb ion adsorbate were 40 minutes at 60 ppm while for phenol adsorbate were 5 hours at 100 ppm. The adsorption efficiency for Pb cation adsorbate was 99.57%. While for phenol adsorbate is 81.05%. Characterization with FTIR, SEM-EDX, and SAA showed a C-Cl bond, the pores were visible, and an increased surface area of activated carbon was 36.9 times the surface area of carbon and the pores formed were mesoporous.

Pemanfaatan Surfaktan Kationik Hasil Sublasi sebagai Molekul Pengarah pada Pembuatan Material Berpori dari Sekam Padi Endah Wulan Juni; Arnelli Arnelli; Sriatun Sriatun
Jurnal Kimia Sains dan Aplikasi Vol 15, No 1 (2012): Volume 15 Issue 1 Year 2012
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Penelitian pemanfaatan surfaktan kationik dari hasil sublasi sebagai molekul pengarah pada pembuatan material berpori dari sekam padi Telah dilakukan. Tujuan penelitian ini adalah untuk mengetahui pengaruh konsentrasi surfaktan dari hasil sublasi terhadap karakter material hasil sintesis. Proses sublasi dilakukan untuk memisahkan surfaktan kationik dari larutan dan menghasilkan surfaktan kationik dari golongan ammonium kuarterner dengan CMC (Konsentrasi Misel Kritis) 2,1 g/L. Surfaktan kationik divariasi konsentrasi yaitu di bawah CMC (M1) = 1 g/L, pada CMC (M2) = 2,1 g/L dan di atas CMC (M3) = 10,5 g/L. Hasil XRD menunjukkan bahwa hasil sintesis merupakan padatan kristal. Hasil BET menunjukkan luas permukaan, volume pori total dan radius pori dari masing-masing hasil sintesis berturut-turut adalah 7,18 m2/g; 4,21 x 10-3 cm3/g; 11,721 Å untuk M1; 9,81 m2/g; 5,66 x 10-3 cm3/g; 11,54 Å untuk M2 dan 9,06 m2/g; 5,07 x 10-3 cm3/g; 11,196 Å untuk M3. Konsentrasi surfaktan kationik pada CMC (M2) menghasilkan material berpori dengan luas permukaan dan volume pori paling tinggi relatif terhadap M1 dan M3. Komposisi mineral material hasil sintesis berupa campuran dari natrium silikat hidrat, aluminum hidrogen silikat, dan natrium hidrogen silikat hidrat. Material hasil sintesis adalah mesopori dengan diameter pori rata-rata 22 Å.

Detergensi Natrium Dodesilbenzen Sulfonat dengan Penambahan Natrium Tripolifosfat dan Variasi pH Briyanto Briyanto; Arnelli Arnelli; Ahmad Suseno
Jurnal Kimia Sains dan Aplikasi Vol 13, No 1 (2010): Volume 13 Issue 1 Year 2010
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Detergensi dapat ditingkatkan dengan penambahan natrium tripolifosfat dan mengatur pH pada saat pencucian. Detergensi yang dipelajari adalah detergensi natrium dodesilbenzen sulfonat hasil sintesis. Natrium dodesilbenzen sulfonat diperoleh dengan reaksi alkilasi, sulfonasi dan netralisasi. Produk dianalisis menggunakan FTIR dan uji detergensi produk dilakukan dengan mencuci kain katun dengan ukuran 10x10 cm yang telah dikotori dengan kotoran standar tanpa dan dengan penambahan natrium tripolifosfat dan variasi pH. Produk sintesis yang diperoleh berupa kristal abu- abu sebanyak 2,83 gram (rendemen 48,38 %). Pada uji detergensi, diperoleh bahwa daya detergensi optimum dari natrium dodesilbenzen sulfonat pada penambahan 70% natrium tripolifosfat. Semakin bertambahnya pH, semakin meningkatkan detergensi dan maksimum pada pH = 11,5

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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