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All Journal VALENSI Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan IPTEK The Journal for Technology and Science Jurnal Riset Kimia JOURNAL ONLINE OF PHYSICS JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Journal of The Indonesian Society of Integrated Chemistry al Kimiya : Jurnal Ilmu Kimia dan Terapan
Heriyanti Heriyanti
Departement Chemistry, MIPA, Faculty Of Sains And Technology, Universitas Jambi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Environmental Science Materials Science & Nanotechnology Physics Other

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Synthesis and Characterization of Nano-sized Carbonated Calcium Hydroxyapatite (CHAp) from Rebon shrimp (Acetes erythraeus) as a Candidate for Dental Restoring Application Ngatijo Ngatijo; Restina Bemis; Heriyanti Heriyanti; Rahmi Rahmi; Nashih Ulwan; Rahmat Basuki
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 7, No. 2, November 2021
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v7i2.21359

Abstract

Carbonated calcium hydroxyapatite (CHAp) exhibits excellent biocompatibility with bone and teeth, making it an ideal candidate for orthopedic and dental application. However, the study of CHAp synthesis from natural material is still scarce. The purpose of this research is to synthesize and characterize of CHAp, using Rebon shrimp (Acetes erythraeus) as a calcium source. The synthesis was conducted by hydrothermal method with the variation of Ca/P ratios 1.61; 1.67; 1.73. The as-prepared CHAp was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy-energy dispersive X-ray (SEM-EDX). The FT-IR results show that synthesized material exhibited characteristic CHAp band of hydroxide at 3448 and 1635 cm-1, carbonate at 872 and 1427 cm-1, and phosphate at 1049; 606; and 570 cm-1. The diffractogram pattern assigned the all observed peak of CHAp are in good agreement compared to CHAp database with the nano-scale size. It also observed that the high Ca/P ratio will decrease the crystallinity of CHAp. The as-prepared CHAp micrograph is agglomerates spherical form with size between 5-20 nm which build up from 18–26 nm crystallite particles. The result of this research confirmed that Rebon shrimp is the promising materials for calcium source in CHAp production.
Black Water Purification by Activated Carbon from Ilalang Weeds (Imperata cylindrica) Adsorbent in Peatland Rural Area Ngatijo Ngatijo; Heriyanti Heriyanti; Winda Arinda Putri; Aslan Irunsah; Bayu Ishartono; Rahmat Basuki
Jurnal Riset Kimia Vol. 13 No. 1 (2022): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i1.449

Abstract

The black water containing humic acid, HA in peat land rural area is a serious issue. This study aims to synthesis of activated carbon, AC from Ilalang Weeds, IW (Imperata cylindrica) as low-cost adsorbent for HA. The success AC synthesis by H3PO4 activator from IW was evidently characterized by Fourier Transform Infra-Red, FTIR and Scanning Electron Microscopy, SEM. The effects of pH solution, initial HA concentration, and contact time were systematically studied to investigate the performance of Activated Carbon from Ilalang Weeds, ACIW. The results showed the increasing of Langmuir monolayer capacity of HA adsorption on carbon from IW before (49.75 mg g-1) and after (56.82 mg g-1) activation process at the pH optimum 6.0. The equilibrium adsorption data fitted with the isotherm model was shifted from multilayer Freundlich model (CIW) into monolayer Langmuir model as the consequences of increasing pore diameter size and active sites intensity. Calculation of adsorption energy by Dubinin-Radushkevich (EDR) model, 0.50 and 2.24 kJ mol-1 for CIW and ACIW, respectively, showed the increasing of physical affinity of HA with the active sites of adsorbent. Adsorption kinetics showed that the adsorption behavior followed the Ho pseudo-second-order kinetic model. The experimental results of this work demonstrate that the ACIW can be used as a promising low-cost adsorbent for HA removal for clean water production in peat land rural area. 
STUDY AWAL KARAKTERISASI SENSOR WARNA TC3200 UNTUK MENENTUKAN KADAR KAFEIN PADA KOPI Heriyanti Heriyanti; Samsidar Samsidar; Iful Amri; Jesi Pebralia; Rustan Rustan; Linda Handayani; Mardian Peslinof; Desi Ayundari; Sutrisno Sutrisno
JOURNAL ONLINE OF PHYSICS Vol. 7 No. 1 (2021): JOP (Journal Online of Physics) Vol 7 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v7i1.15286

Abstract

Pengukuran kadar kafein saat ini dibutuhkan agar penggunaan/konsumsi kopi sesui dengan dosis yang dibutuhkan, akan tetapi, sulitnya karakterisasi dan uji kimia dalam penentuan kadar kafein menjadi hambatan untuk mengetahui dosis kafein secara cepat dan tepat. Pada penelitian ini telah dilakukan karakterisasi sensor warna TC3200 sebagai studi awal rangkaian pembuatan alat ukur kafein berbasis sensor. Sampel yang digunakan adalah kopi Liberika, Arabika dan Robusta yang berasal dari Provinsi Jambi. Preparasi sampel dilakukan dengan proses roasting pada suhu 180OC dan pada saat proses berjalan pengambilan sampel secara real time pada (t= 38-45s), hasil preparasi sampel dilakukan uji UV-Vis untuk mengetahui konsentrasi  kandungan kadar kafein. Selanjutnya karakterisasi sensor warna TC3200 dilakukan untuk mengetahui nilai RGB (Red, Green, Blue) dari masing – masing sampel kopi. Hasil penelitian didapatkan nilai kadar kafein dari pengukuran UV-Vis yang akan menjadi database sensor, dan hasil karakterisasi sensor warna TC3200 pada kopi Liberika, Arabika dan Robusta secara kuantitatif didapatkan tingkat kevalidan data masing – masing 80%, 60% dan 70% dan analisis kualitatif bahwa sensor dapat digunakan untuk menetukan kadar kafein pada kopi dengan tingkat kematangan atau waktu roasting kopi yang berbeda.
Pirolisis Sampah Plastik Jenis Polipropilena (PP) menjadi Bahan Bakar Cair-Premium-like Anisya Putri Islami; Sutrisno Sutrisno; Heriyanti Heriyanti
JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Vol 3, No 2 (2019)
Publisher : State University of Malang or Universitas Negeri Malang (UM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (173.273 KB) | DOI: 10.17977/um0260v3i22019p001

Abstract

Penelitian mengenai konversi berbagai sampah plastik menjadi bahan bakar cair masih terus dikembangkan. Tujuan dari penelitian adalah mengkonversi sampah plastik jenis polipropilena (PP) menjadi bahan bakar cair, premium-like, melalui proses pirolisis. Sampah plastik jenis PP di pirolisis menggunakan reaktor batch yang dilengkapi dengan kondensor. Yield bahan bakar cair yang diperoleh dari 8 kg plastik yaitu 63,375% dengan suhu maksimum pirolisis yaitu 330°C. Hasil analisis GC-MS menunjukkan bahan bakar cair yang diperoleh masih memiliki rantai karbon panjang yaitu C7-C54 dengan fraksi utama adalah hidrokaron dengan C11-C20. Nilai kalor yang dimiliki bahan bakar cair adalah 46,199 MJ/kg dengan nilai densitas 0,726 g/mL.
Pengenalan ecoprint guna meningkatkan keterampilan siswa dalam pemanfaatan bahan alam Nindita Clourisa Amaris Susanto; Madyawati Latief; Ratih Dyah Puspitasari; Restina Bemis; Heriyanti Heriyanti
Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Vol 4, No 1 (2021): Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS)
Publisher : University of Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jipemas.v4i1.8974

Abstract

Ecoprint is a technique for printing colors and shapes on fabric using natural materials. Ecoprint techniques have been introduced to junior high school students because they can capture the material and teacher's instructions independently, think critically and creatively. The purpose of the ecoprint introduction activity is to provide knowledge about ecoprint and students' skills in utilizing local potential through natural materials or plants around the school. The methods used are lectures, demonstrations, practice, and evaluation. The questionnaires and direct observations on ecoprint products were used as evaluations for this activity. Students have been able to print motifs and colors from leaves and flowers on a cloth to produce ecoprint products according to their respective creativity. 
Decontamination of Mercury from Mined Soil using Magnetite Functionalized Quaternary Ammonium Silica (Fe3O4/SAK) Ngatijo Ngatijo; Defia Indah Permatasari; Faizar Farid; Restina Bemis; Heriyanti Heriyanti; Rahmat Basuki; Yudha Gusti Wibowo
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 1 (2021): March 2021
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.94 KB) | DOI: 10.14710/presipitasi.v18i1.88-98

Abstract

Artisanal small-scale gold mining (ASCGM) has caused mercury contamination. However, efforts to decontaminate mercury from the ex-mining soils are still rare. This study aims to synthesize quaternary ammonium silica functionalized magnetite (Fe3O4/SAK) as a low price, highly available, and quickly separated adsorbent for mercury decontamination from ex-mining soils samples. The synthesis of Fe3O4/SAK and the mercury decontamination process was carried out by the co-precipitation and batch type reactor procedure, respectively. The Fourier Transform-Infra Red (FT-IR) characterization of synthesized Fe3O4/SAK informed the appearance of siloxane, silanol, methyl, methylene, and Fe-O functional groups. Crystal analysis by X-Ray Diffraction (XRD) showed that the typical peaks of SiO2 and Fe3O4 were emerged at 2θ 22.8˚ and 35.52˚, respectively. Morphological studies and elemental analysis using Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX) indicated the successful functionalization Fe3O4 by SAK in the transformation of surface morphology and composition of the main elements, namely C, O, Si, and Fe. The results of characterization using Surface Area Analyzer (SAA) showed that the surface area and pore diameters were 224.98 m2/g and 36.149-38.70 Å, respectively. The optimum results for adsorbing Hg22+ metal ions were obtained at pH 4.0, and the adsorbent mass was 0.1 g. The Fe3O4/SAK has been proven to be an easily separable adsorbent after the mercury decontamination process in ex-mining soil samples with an adsorption efficiency of 43.36% (0.722 mg/g).
Analisis Kandungan Silikon (Si) pada Batubara PT. Tambang Bukit Tambi Provinsi Jambi Heriyanti Heriyanti; Winda Mustika Sari; Sutrisno; Rayandra Asyhar
Journal of The Indonesian Society of Integrated Chemistry Vol. 11 No. 2 (2019): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v11i2.7761

Abstract

[Analysis Of Silicone (Si) in Coal of PT. Tambang Bukit Tambi Jambi Province]Batubara merupakan komoditas hasil tambang dan merupakan produk andalan di Provinsi Jambi. Batubara merupakan endapan sedimen yang terdiri dari komponen organik dan anorganik, yang mengandung jenis-jenis mineral yang terikat didalamnya, yaitu diantaranya C, Si dan Al. Tujuan penelitian ini adalah melakukan analisis kandungan silikon untuk menentukan jenis batubara yang dihasilkan oleh PT. Tambang Bukit Tambi. Metode yang dilakukan adalah dengan mengekstraksi batubara menggunakan NaOH 3M dan HCl 1 M dan dilanjutkan engan metode metalotermis. Hasil ekstraksi diperoleh silika adalah massa rata-rata sebesar 4,89 gram dengan persentasi kadar 46,57%. Kadar silikon yang didapatkan dari hasil metalotermis yang dianalisis menggunakan AAS adalah sebesar 7,23%. Berdasarkan kadar silikon, maka batubara PT. Tambang Bukit Tambi dikategorikan dalam jenis batubara sub bituminus.
Pengaruh Variasi Konsentrasi Alumina Pada Sintesis Nanokomposit Hidroksiapatit/ Alumina dari Udang Papai Menggunakan Metode Hidrotermal Restina Bemis; Heriyanti Heriyanti; Rahmi Rahmi; Ratih Dyah Puspitasari; Datia Imawati
Journal of The Indonesian Society of Integrated Chemistry Vol. 15 No. 1 (2023): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v15i1.21309

Abstract

Tujuan penelitian untuk mensintesis nanokomposit dan mengkarakterisasi hidroksiapatit dari udang papai dan dikomposit untuk meningkatkan sifat mekanik tanpa mengubah biokompatibilitasnya. Komposit hidroksiapatit menggunakan bahan lain seperti alumina disintesis menggunakan metode hidrotermal dengan variasi konsentrasi 0,025; 0,05 dan 0,075 juta. Komposit HA/Al2O3 dikarakterisasi dengan FTIR, SEM, dan XRD. Hasil FTIR menunjukkan bilangan gelombang. HA/Al2O3 yang disintesis menunjukkan pita O-H yang khas pada kisaran bilangan gelombang 2361-3460cm-1. CO32- pada rentang bilangan gelombang 1380-1500 cm-1. Al-O pada rentang bilangan gelombang 901cm-1 menunjukkan bahwa HA telah didoping dengan Al2O3. PO43- pada bilangan gelombang 605;873 dan 1041 cm-1. Pola difraktogram menentukan bahwa semua puncak HA/Al2O3 yang diamati berada pada daerah 2theta 10-70° menurut database referensi dan derajat kristalinitas meningkat dengan konsentrasi tinggi alumina yang digunakan. Morfologi doping HA/Al2O3 berupa aglomerasi karena pada proses sintesis menggunakan metode hidrotermal tidak ada pengadukan sehingga bahan kurang homogen, analisis SEM menggunakan software origin dan image j menunjukkan presentase porositas lebih kecil sehingga memenuhi persyaratan untuk digunakan sebagai implan dan memberikan nilai ukuran semakin kecil dalam skala nano, yakni pada rentang 5-14,5 nm.
The Effect of Variations of Hydrothermal Temperatures on Ex-Situ Hydroxyapatite/Al2O3 Doping Process from Papai Shrimp (Acetes erythraeus) Restina Bemis; Ratih Dyah Puspitasari; Heriyanti Heriyanti; Rahmi Rahmi; Gessy Tri Priyanti
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 9, No 2 (2022): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v9i2.20520

Abstract

Hydroxyapatite (HA) is an alloplastic material that is commonly used as a substitute for bone grafts or bone grafts because it has bioactive properties, namely osteoconduction. This study aims to improve or develop the function of hydroxyapatite to become a strong and resilient biological device that can withstand loads for appropriate functions such as bone implants. Therefore, it is necessary to modify the structure, among others, by the reinforcement process (composite formation) with other materials.The doping of hydroxyapatite/Al2O3 in this study was carried out using the hydrothermal method. The hydrothermal method is one of the hydroxyapatite synthesis methods carried out at high pressure and temperature to achieve equilibrium. The material used in this study was papai shrimp as a source of calcium. The temperature has an effect in this study where the higher the doping temperature used, the higher the degree of crystallinity, particle size homogeneity, and porosity value. From the doping results, it is known that a temperature of 300°C produces a degree of crystallinity of 54.32% and a crystal size of 3.75 nm with a porosity value of 99.38%. This result is much better than the undoped hydroxyapatite in the previous study.
Catalytic Cracking of Polypropylene-Low Density Polyethylene Pyrolysis Oil over Hierarchical H-ZSM-5 Catalyst Dwi Cahyani, Silvia; Marlinda, Lenny; Evrianti, Yuli; Rimawan, Bagas; Heriyanti, Heriyanti; Rahmi, Rahmi; Sutrisno, Sutrisno
IPTEK The Journal for Technology and Science Vol 35, No 3 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i3.19188

Abstract

The conversion of plastic waste into liquid fuel has become the center of attention by researchers as a way to overcome environmental problems. According to last research, the polypropylene (PP) and low-density polyethylene (LDPE) pyrolysis oil mixture was classified into hydrocarbon range diesel which have the number of carbon atom from C12-C24. Because that, the effect of LDPE/PP pyrolysis oil over hierarchical H-ZSM-5 catalyst on hydrocarbon composition of liquid fuel oil using the catalytic cracking reactor at 200 oC was investigated. Hierarchical H-ZSM-5 catalyst (hH-ZSM-5) was obtained from H-ZSM-5 modified by desilication method using NaOH. Gas chromatography-mass spectrometry showed that the liquid fuel oil from the catalytic cracking of all variations consisted of aliphatic hydrocarbons with some cycloaliphatic compounds. In ratio of 250 mL/0.5 g (oil/catalyst) aromatic hydrocarbon increased from 1.69 area% to 15.58 area% over H-ZSM5 and hH-ZSM-5 respectively. The higher oil quality with shorter hydrocarbon chains in all variations was obtained over hH-ZSM-5 catalyst, namely in the range of C7-C14 or comparable to hydrocarbon range gasoline and kerosene.
Co-Authors Afrida Afrida Andita Utami Anisya Putri Islami Aslan Irunsah Bayu Ishartono Datia Imawati Defia Indah Permatasari Desi Ayundari Dwi Cahyani, Silvia Evrianti, Yuli Faizar Farid Gessy Tri Priyanti Iful Amri Jesi Pebralia Lenny Marlinda Linda Handayani Madyawati Latief Mardian Peslinof Nashih Ulwan Ngatijo Ngatijo Nindita Clourisa Amaris Susanto Rahmat Basuki Rahmi Rahmi Ratih Dyah Puspitasari Rayandra Asyhar Restina Bemis Restina Bemis Rimawan, Bagas Rustan Samsidar Samsidar Sutrisno Wibowo, Yudha Gusti Winda Arinda Putri Winda Mustika Sari