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All Journal Bulletin of Chemical Reaction Engineering & Catalysis IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Science and Technology Indonesia Indonesian Journal of Chemistry Communications in Science and Technology Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Jurnal Kreativitas PKM Molekul: Jurnal Ilmiah Kimia JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) International Journal of Sustainable Transportation Technology Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Journal of Chemical Science
Addy Rachmat
Department Of Chemistry, Faculty Of Mathematics And Natural Science, Sriwijaya University
Religion Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation

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Journal : Molekul: Jurnal Ilmiah Kimia

 1 
Removal of Pb(II) using Hydroxyapatite from Golden Snail Shell (Pomacea canaliculata L.) Modified with Silica Poedji Loekitowati Hariani; Fahma Riyanti; Fatma Fatma; Addy Rachmat; Aldi Herbanu
Molekul Vol 15, No 2 (2020)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (430.136 KB) | DOI: 10.20884/1.jm.2020.15.2.641

Abstract

The composites of hydroxyapatite and SiO2 were successfully synthesized. The hydroxyapatite was prepared from golden snail shells (Pomacea canaliculata L). The hydroxyapatite and hydroxyapatite-SiO2 composites were characterized using XRD, FTIR, SEM-EDS. Furthermore, hydroxyapatite and hydroxyapatite-SiO2 composites were used to remove Pb(II) from aqueous solution. Various adsorption parameters such as pH of the solution, contact time, and initial Pb(II) concentration were used to study the adsorption process. The optimum pH of the solution for removal of Pb(II) by hydroxyapatite and hydroxyapatite-SiO2 composite at pH 6 and contact time at 60 minutes. Both adsorbents follow the Langmuir isotherm. The maximum adsorption capacity of the hydroxyapatite-SiO2 composite is greater compare to hydroxyapatite, respectively 135.14 and 123.46 mg/g. The pseudo-second order kinetic model had a correlation coefficient (R2) greater than the pseudo-first order so pseudo-second order kinetic is better to describe adsorption kinetics
Comparison of Cr/C and Cr2O3/Z Catalysts on Hydrocracking of Bio Oil from Pyrolysis of Palm Empty Fruit Bunches Zainal Fanani; Hasanuddin hasanuddin; Addy Rachmat; Muhammad Said
Molekul Vol 16, No 3 (2021)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.645 KB) | DOI: 10.20884/1.jm.2021.16.3.812

Abstract

Bio-oil derived from palm empty fruit bunch is not suitable for fuel purpose due to high acidity and low heating. Cr2O3/Zeolite and Cr/C catalysts was developed to upgrade bio-oil through hydrocracking. The catalyst prepared via impregnation method followed by oxidation-reduction. Ammonia and pyridine adsorption used to evaluate acidity as well as crystallinity assessment by using XRD. Hydrocracking reaction conducted in hydrogen gas flow rates 0.5-3.0 L/min, the surface area of Cr/C catalyst found out 1,497.07-1,652.58 m2/g, whilst the temperatures 450 to 700 ℃ and the catalyst weights between 0.5 to 2.5 g. Acidity calculated from ammonia and pyridine adsorption shows Cr2O3/Zeolite has higher value compare to pristine Zeolite. XRD pattern shows Cr2O3/Zeolite has high crystallinity as indicated by sharp and pointed diffraction peaks. The optimum condition of hydrocracking confirmed by lower density of liquid product. The variables obtained by a separate experiments shows that H2 gas flow rate best at 2.5 L/min, temperature of hydrocracking 500 ℃ for Cr2O3/Zeolite and 600oC for Cr/C whereas weight of Cr2O3/Zeolite catalyst is 1.5 g. The Cr/C catalyst that gave low density product possess 1,554.48 m2/g surface area. GCMS data shows increase on the number of straight chain compounds within the hydrocracking product.
PENGGUNAAN KATALIS PALADIUM DALAM REAKSI ARILASI n-OKTILSILAN DENGAN 2-IODIDA-5-METIL TIOFEN Aldes Lesbani; Addy Rachmat; Risfidian Mohadi; Eliza Eliza
Molekul Vol 9, No 1 (2014)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (594.063 KB) | DOI: 10.20884/1.jm.2014.9.1.146

Abstract

Telah dilakukan proses arilasi n-oktilsilan dengan 2-iodida-5-metil tiofen mengunakan katalis palladium dengan teknik reaksi kopling untuk mendapatkan variasi senyawa hasil arilasi. Produk hasil arilasi yang terbentuk dimurnikan dengan metode kromatografi kolom silika dengan eluen etil asetat dan dikarakterisasi menggunakan spektroskopi massa, spektroskopi 1H NMR, 13C NMR, dan DEPT-135. Hasil penelitian menunjukkan bahwa senyawa yang terbentuk dari hasil arilasi yakni tris(5-metil-2-tiofen)oktilsilan yang berupa cairan tak berwarna dengan nilaim/z sebesar 432. Hasil pengukuran menggunakan spektroskopi 1H NMR menghasilkan tujuh proton ekivalen. Pengukuran menggunakan spektroskopi 13C NMR menghasilkan tiga belas karbon ekivalen yang kemudian dikonfirmasi dengan DEPT-135. Hasil karakterisasi menggunakan spektroskopi massa dan spektroskopi NMR (H dan C) menunjukkan senyawa hasil sintesis adalah tris(5-metil-2-tiofen)oktilsilan.
Co-Authors A.M. Ramadhan Adelia, Ory Adhiyanti, Nurmalina Ahmad Fatoni Aldes Lesbani Aldi Herbanu Amelia, Icha Anisa Fitri Amatullah Bakri Rio Rahayu Budiman, Rahmadi Dasril Basir Dea Radestia Rahmah Dedi Rohendi Desnelli Desnelli Dwi Hawa Yulianti Dwi Hawa Yulianti Edy Herianto Majlan, Edy Herianto Elfita Elfita Eliza Eliza Eliza Eliza Fahma Riyanti Fanani, Muhammad Zainal Fatma Fatma Fatma Fatmawati Fatmawati Ferlinahayati Ferlinahayati Firanda, Dera Okta Handayani Citra Pratiwi Hardi Aji Badarwi Hasanuddin Hasanuddin Hasanudin hasanudin Hasanudin Hasanudin Hasanudin Hasanudin Hasanudin, Hasanudin Hermansyah Hermansyah Hermansyah Julinar Julinar Julinar Julinar Muhammad Said Muhammad Said Muhammad Said Muhammad Said Muhammad Said Musifa, Eva Nabila Aprianti Nirwan Syarif Nirwan Syarif Nirwan Syarif Nirwan Syarif, Nirwan Normah Normah, Normah Nurlisa Hidayati Nurmalina Adhiyanti Poedji Loekitowati Hariani Poedji Loekitowati Hariani Pratama, Nisa Manora Rahmah, Dea Risfidian Mohadi Risfidian Mohadi Rizki, Widya Twiny Salni Salni Salni Salni Sya'baniah, Nyimas Syabaniah, Nyimas Febrika Syahputra, Rio Aldo Syarif, Nirwan Sya’baniah, Nyimas Febrika Tarmizi Taher Utama, Muhammad Prima Widia Purwaningrum Yulianti, Dwi Yulianti, Dwi Hawa