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All Journal VALENSI Jurnal Kimia Khatulistiwa Indonesian Journal of Chemistry Indonesian Journal of Pure and Applied Chemistry Jurnal Kartika Kimia GERVASI: Jurnal Pengabdian kepada Masyarakat Jurnal Rekayasa Proses
Intan Syahbanu
Jurusan Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Tanjungpura
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Languange, Linguistic, Communication & Media Mathematics Social Sciences Other

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THE EFFECT OF ADDITION BY BUTHYLATED HYDROXYTOLUENE (BHT) ON PHYSICAL PROPERTIES OF GEOMEMBRANE FROM RECYCLED HIGH DENSTY POLYETHYLENE (HFPE) PLASTIC WASTE Veren Fransiska; Intan Syahbanu; Adhitiyawarman Adhitiyawarman
Indonesian Journal of Pure and Applied Chemistry Vol 6, No 1 (2023)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v6i1.62725

Abstract

Recycled High Density Polyethylene (HDPE) has been prepared for geomembrane construction material. The aim of this research was to study the effect of Butylated Hydroxytoluene (BHT) addition as an antioxidant on the characteristics of the resulting geomembrane. Fourier Transform Infra Red (FTIR) analysis was carried out to examine functional groups of recycled HDPE and prepared geomembranes. Mechanical properties, permeability and hydrophobicity of geomembrane were observed to determined optimum BHT addition. The results of FTIR analysis on recycled HDPE showed the presence of functional groups at wavelengths 2912 and 2847 cm-1 (C-H stretching); 1474 and 1467 cm-1 (CH2 bend); 721 cm-1 (CH2 Rock). After being formulated with other materials to obtain geomembranes, it was not found new peak indicating that the presence of BHT in geomembrane only physical interaction occurs. All of geomembranes had no permeability to water and reach 100% of hydrophobicity. The highest­ tensile test value was shown by geomembrane with 0,25 b/b% of BHT which about 21.235 MPa and 16.01 MPa for before and after soil burial test for four weeks, respectively. Perhaps might be due to the interaction between BHT at low concentrations which has lower polarity and HDPE which is nonpolar has better compatibility than at other concentrations
Pelatihan Pembuatan Sabun Cuci Tangan Bagi Ibu-Ibu di Desa Kuala Dua Kubu Raya Intan Syahbanu; Winda Rahmalia; Puji Ardiningsih; Adhitiyawarman Adhitiyawarman; Harlia Harlia; Muhamad Agus Wibowo; Afghani Jayuska; Imelda Hotmarisi Silalahi; Anthoni B. Aritonang
GERVASI: Jurnal Pengabdian kepada Masyarakat Vol. 7 No. 2 (2023): GERVASI: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM IKIP PGRI Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31571/gervasi.v7i2.4871

Abstract

Pandemi Covid-19 telah banyak membawa perubahan bagi masyarakat. Dalam kurun waktu dua tahun sejak tahun 2020, telah terbentuk kebiasaan baru untuk mencegah penularan virus tersebut. Salah satu wilayah dengan konfirmasi positif Covid-19 tertinggi adalah Kecamatan Sungai Raya. Salah satu faktor tingginya peningkatan kasus terkonfirmasi positif Covid-19 adalah kurangnya kesadaran dari warga untuk menjaga diri dan lingkungan dari penyebaran yang lebih meluas. Tujuan dari program pengabdian kepada masyarakat (PkM) ini adalah untuk meningkatkan pengetahuan Ibu-ibu terkait pentingnya menjaga kesehatan dan memberikan wawasan keterampilan tentang cara pembuatan sabun cuci tangan.  Metode pelaksanaan kegiatan PkM ini adalah dengan memberikan penyuluhan tentang pentingnya gerakan 5M serta pelatihan pembuatan sabun cuci tangan oleh warga. Mitra dalam program PkM ini adalah para ibu di Desa Kuala Dua Kecamatan Sungai Raya Kabupaten Kubu Raya. Jumlah peserta yang mengikuti kegiatan ini adalah 22 orang dengan rentang usia 20-50 tahun. Hasil evaluasi menunjukkan Hasil evaluasi menunjukkan bahwa meningkatnya pengetahuan dasar peserta tentang bahan-bahan pembuatan sabun cuci tangan, peserta termotivasi untuk membuat dan menjual sabun cuci tangan, meningkatkan kesadaran akan pentingnya mencuci tangan dengan sabun dan menjaga kesehatan.
Deep Eutectic Solvent (DES) Based on Choline Chloride and Mono-, Di-, Poly-Ethylene Glycol as KI/I2 Electrolyte Solvents on DSSC Devices Adhitya Adhitya; Winda Rahmalia; Intan Syahbanu; Gusrizal Gusrizal; Adhitiyawarman Adhitiyawarman
Indonesian Journal of Chemistry Vol 23, No 5 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.82754

Abstract

Deep eutectic solvent (DES) has high viscosity and electrical conductivity values, so it can be used as an electrolyte solvent in dye-sensitized solar cells (DSSCs). This research was conducted to produce DES based on choline chloride (ChCl) and ethylene glycol (EG), diethylene glycol, and polyethylene glycol-400, which were then used as KI/I2 couple redox electrolyte solvent to improve the DSSC performance. The synthesis was carried out by mixing each component in several variations of the mole fraction of ChCl (xCHCl) at 80 °C for 15 min, and then was characterized by their pH, freezing point, density, viscosity, and electrical conductivity. A mixture that meets the criteria as a eutectic solvent and has a freezing point of less than −18 °C with the highest electrical conductivity value is DES ChCl:EG with xChCl 0.3 and xChCl 0.4. Both DESs were then used as a solvent for KI/I2, combined with acetonitrile in various compositions. The electrolyte with the highest electrical conductivity value was KI/I2 dissolved in ChCl:EG with xChCl 0.3 solvent 6:4 v/v, and then employed in DSSC device. The best performance of DSSC (Isc= 0.155 mA/cm2; Voc=0.465 V; Pmax= 0.719 W; ηmax= 0.072%) was produced under a light intensity of 0.1 W/cm2.
Synthesis of hydroxyapatite from hard clams shell (Meretrix spp.) using hydrothermal method as a dental implant coating biomaterials Zefania Riri; Patrinela Hilda; Lalak Tarbiyatun Nasyin Maleiva; Intan Syahbanu; Syahrul Khairi; Kiki Aristi
Jurnal Rekayasa Proses Vol 19 No 1 (2025): Volume 19, Number 1, 2025
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.18186

Abstract

Biomaterials that can be used as coatings on dental implants are hydroxyapatites. One of the natural substances used in the synthesis of hydroxyapatite is the ale-ale shell, which has a substantial calcium content of 93,444%. The hydroxyapatite synthetic was carried out using a hydrothermal method that uses the calcium precursor (Ca) of the ale-ale shell and phosphate precursors (P) derived from (NH4)2HPO4, as well as NH4OH as a pH regulator. This research uses the influence variables of CaO/(NH4)2HPO4 concentration (0.67; 1.67; and 2.67) and pH (11, 12, and 13). The results of the FTIR analysis showed that the typical absorption peaks of hydroxyapatites are , OH-, and group absorptions. XRD analysis results showed the formation of major HAp peaks that correspond to ICDD data 01-072- 1243, with the highest peaks in succession appearing at angles 31,74; 31,67; and 31,64°. The crystal size is 35,25; 123,39; and 55,81 nm with degrees of crystallinity in sequence of 87,28; 91,67; and 95,09° and has a hexagonal crystal shape. Hydroxyapatite synthesis with ale-ale shell waste raw materials by hydrothermal method gives the best results at a concentration of CaO/(NH4)2HPO4 2.67-pH 13.
Co-Authors Adhitiyawarman, Adhitiyawarman Adhitya Adhitya Afghani Jayuska Alfian Yulia Rahmat Annisa Anugraini Annisa Bella Maharani Anthoni B. Aritonang Chyntia Nabela Deni Pranata Desi Listiani Eka Intan Kumala Putri Ferdian Rizki Amanda Gusrizal Gusrizal Hanna Sjafarina Harlia Harlia Husna Amalya Melati Imelda Hotmarisi Silalahi Kiki Aristi Lalak Tarbiyatun Nasyin Maleiva Lia Destiarti Maria Desi Furnata Mirna Tersiana Tamnasi Muhamad Agus Wibowo Nurlina, Nurlina Patrinela Hilda Puji Ardiningsih Puji Ardiningsih Risya Sasri Rudiyansyah Rudiyansyah Syahrul Khairi Veren Fransiska Winda Rahmalia Winda Rahmalia Winda Rahmalia Yatim Mustakim Zefania Riri