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All Journal VALENSI PROSIDING SEMINAR KIMIA Chemistry Indonesian Journal of Chemical Research JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Pengabdian Kepada Masyarakat (Mediteg) Jurnal Ilmiah Berkala: Sains dan Terapan Kimia JURNAL HUTAN TROPIS JOURNAL OF WETLANDS ENVIRONMENTAL MANAGEMENT Jurnal Natural Scientiae (JNS)
Dahlena Ariyani
Program Studi Kimia Fakultas MIPA Universitas Lambung Mangkurat
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Physics Social Sciences

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Journal : Chemistry Indonesian Journal of Chemical Research

 1 
Pengaruh Penambahan Carboxymethyl Cellulose Terhadap Karakteristik Bioplastik Dari Pati Ubi Nagara (Ipomoea batatas L.) Erni Puryati Ningsih; Dahlena Ariyani; Sunardi Sunardi
Indonesian Journal of Chemical Research Vol 7 No 1 (2019): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2019.7-sun

Abstract

Synthesis and characterization of bioplastics from Nagara sweet potatoes (Ipomoea batatas L) starch with carboxymethyl cellulose (CMC) as a filler has been conducted. The purpose of this study was to evaluate the effects of CMC addition on the characteristic of bioplastics from Nagara sweet potato (Ipomoea batatas L) starch. Bioplastic synthesis was carried out by the melt intercalation method with variations in the amount of CMC 0-30% (w/w). Bioplastics were analyzed using FTIR spectrophotometer, thickness, solubility, water resistance, water vapor transmission rate, tensile strength and elongation. The values of the tensile strength of the bioplastic produced increases with increasing of CMC. The results also showed that the optimum CMC concentration in bioplastics production is 9% (w/w) with a tensile strength value 0.5281 N/mm2.
Pengaruh Waktu Reaksi Terhadap Viskositas Dan Densitas Tetraetil Ortosilikat Dari Silika Abu Sekam Padi Dwi Rasy Mujiyanti; Hayatun Nisa; Kholifatu Rosyidah; Dahlena Ariyani; Abdullah Abdullah
Indonesian Journal of Chemical Research Vol 8 No 1 (2020): Edisi Bulan Mei (Edition for May)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/10.30598//ijcr.2020.8-dwi

Abstract

Tetraethyl Ortosylicate (TEOS) is a material is widely used in industrial fields. One source of silica (SiO2) is rice husk ash. In this study was determined the effect of reaction time on viscosity and density in making TEOS from silica rice husk. Silica resulting from the purification of rice husk ash is used in the TEOS manufacturing process by examining the variation of reaction time. One mole of ethanol and 0.25 mole of silica powder were added into 250 ml of round bottom flask followed by the addition of 1 gram of CuO/Al2O3 catalyst then the mixture was refluxed for 30, 35, 40, 45 and 50 hours with sufficient stirring and a temperature of 90 °C. The FTIR characterization results show that there are three main functional groups, namely the -OH, Si-O and C-O groups in the five TEOS synthesis results. Wavenumbers of the –OH functional groups obtained ranged from 3349 cm-1 - 3315 cm-1; Si-O functional groups range from 813 cm-1 - 606 cm-1 and C-O functional groups range from 1105 cm-1 - 1040 cm-1. Reaction time has no significant effect on viscosity. Reaction time has no significant effect on the density and density of the resulting TEOS.
Silica Content Analysis of Rice Husks Siam Unus from South Kalimantan Dwi Rasy Mujiyanti; Dahlena Ariyani; Muna Lisa
Indonesian Journal of Chemical Research Vol 9 No 2 (2021): Edition for September 2021
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2020.9-muj

Abstract

Research on the analysis of rice husk content of Siam Unus with various NaOH concentrations (1.0 M; 1.5 M; 2.0 M; 2.5 M; 3.0 M) has been done. This study aims to obtain data on the effect of variations in NaOH concentration on the purity of the silica extract from Siam Unus rice husks and silica characterization of Siam Unus rice husks using Fourier Transform Infra-Red (FTIR) and X-ray fluorescence spectrometry (XRF). The results showed that the combustion of rice husks at 200 °C as the optimum temperature for 1 hour followed by combustion at 600 °C for 4 hours produces grayish-white rice husks with a yield is 20.70%. Silica functional group characterization showed that silanol (Si-OH) and siloxane (Si-O-Si) as dominant functional groups. The result of composition characterization using XRF showed that SiO2 is the dominant compound with the highest percentage of SiO2 is 1.5 M NaOH extract at 42.80%.
Study Effect of Chitosan-Epichlorohydrin Macropore Beads on Decreasing the Value of Total Dissolved Solid (TDS) and Dyes in Sasirangan Liquid Waste Treatment Dahlena Ariyani; Nabila Khairiyatul Hilma; Umi Baroroh Lili Utami; Uripto Trisno Santoso; Dwi Rasy Mujiyanti
Indonesian Journal of Chemical Research Vol 11 No 1 (2023): Edition for May 2023
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-muj

Abstract

Sasirangan liquid waste contains contaminants that are quite dangerous, characterized by high values of total dissolved solids and dyestuffs. This study aims to determine the effect of dose and pH on chitosan-epichlorohydrin macropore beads. The parameters of the measured waste are total dissolved solids and dyestuffs. The process of absorption of sasirangan liquid waste characterizes by FTIR. The results showed that chitosan-epichlorohydrin beads that interacted with sasirangan liquid waste had optimum results at a chitosan dose of 600 mL/L, with a decrease in the total value of dissolved solid by 2161 mg/L and a decrease in dye by 84.78%. Chitosan-epichlorohydrin beads at pH against total dissolved solid gave optimum results at pH 7 with a reduction in the total dissolved solid value of 2269 mg/L, while pH against dyestuffs gave optimum results at pH 3 with a decrease of 94.09%. The interaction between chitosan and chitosan-epichlorohydrin beads occurred a shift in wave numbers from 943 cm-1 to 932 cm-1 showing the C-O-C group and the chitosan-epichlorohydrin beads spectra with waste at wave numbers 3013-3618 cm-1 to 3007-3631 cm-1 the O-H vibration group overlapped the N-H vibration and showed the result that the beads Chitosan-epichlorohydrin/adsorb sasirangan liquid waste.
Co-Authors Abdullah Abdullah Ahmad Budi Junaidi Azidi Irwan David Hamonangan Simanungkalit Dewi Umaningrum Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Edi Mikrianto Erni Puryati Ningsih Hayatun Nisa Intan Aprilia Rahayu Iriansyah Iriansyah Iriansyah Iriansyah, Iriansyah Jihan Askia Kamilia Mustikasari Kamilia Mustikasari kholifatu rosyidah Kholifatu Rosyidah Komsatun Fitriana Mardi Santoso Maria Dewi Astuti Melissa Melissa Muhammad Aisy Muna Lisa Nabila Khairiyatul Hilma Noer Komari Noor Cahaya Nurmilatina Nurmilatina Nurul Paujiah Radna Nurmasari Rahmat Yunus Rahmat Yunus Ramlah Syam Ratih Wulandari Rd Indah Nirtha Retno Elya Rohmah Riana Maulana Rizky Pradana Nugroho Elyasat Rodiansono Rodiansono Sunardi, Ph.D., Sunardi Taslim Ersam Taslim Ersam Umi Baroroh Lili Utami Uripto T Santoso Uripto T Santoso, Uripto T Uripto Trisno Santoso Uripto Trisno Santoso Utami Irawati Zacky Insan