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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Matematika & Sains Chemistry Indonesian Journal of Chemical Research Jurnal Pengabdian Kepada Masyarakat (Mediteg) Jurnal Ilmiah Berkala: Sains dan Terapan Kimia JURNAL REKAYASA KIMIA & LINGKUNGAN

Dwi Rasy Mujiyanti

Program Studi Kimia, FMIPA Universitas Lambung Mangkurat

Author-ID : 256527

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 Mathematics Social Sciences

Published : 17 Documents Claim Missing Document

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Articles

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KAJIAN pH DAN WAKTU KONTAK OPTIMUM ADSORPSI Cd(II) DAN Zn(II) PADA HUMIN Yunitawati Yunitawati; Radna Nurmasari; Dwi Rasy Mujiyanti; Dewi Umaningrum
Jurnal Sains dan Terapan Kimia Vol 5, No 2 (2011)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Telah dilakukan penelitian tentang adsorpsi Cd(II) dan Zn(II) oleh humin. Tujuan penelitian ini adalah menentukan kondisi pH optimum, waktu kesetimbangan adsorpsi Cd(II) dan Zn(II) oleh humin serta mengetahui gugus fungsi yang berinteraksi dengan logam dengan menggunakan spektrofotometer FTIR. Hasil penelitian menunjukkan bahwa pH optimum adsorpsi untuk Cd(II) adalah 5 dan pH optimum adsorpsi Zn(II) adalah 2. Waktu kontak reaksi untuk Cd(II) adalah 45 menit dan Zn(II) adalah 30 menit. Hasil spektra inframerah menunjukkan bahwa gugus –COOH dan –OH berperan dalam interaksi antara ion logam dengan humin. Kata kunci : Adsorpsi, Humin, Kadmium, Seng

SINTESIS OKSIDA LOGAM AURIVILLIUS SrBi4Ti4O15 MENGGUNAKAN METODE HIDROTERMAL DAN PENENTUAN SIFAT FEROELEKTRIKNYA Edi Mikrianto; Ricky Kurniawan; Dwi Rasy Mujiyanti; Utami Irawati
Jurnal Sains dan Terapan Kimia Vol 8, No 1 (2014)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Salah satu material yang bersifat feroelektrik adalah oksida logam Aurivillius. Pada penelitian ini, dilakukan sintesis oksida logam Aurivillius SrBi4Ti4O15 menggunakan metode hidrotermal selama 72 jam, konsentrasi NaOH 3 M sebagai mineralizer, dan variasi suhu 200°C, 220°C, dan 240°C. Hasil sintesis dikarakterisasi dengan difraksi sinar-X dan didapatkan bahwa suhu sintesis 240°C menghasilkan senyawa berfasa tunggal dengan sistem kristal ortorombik, grup ruang A21am, dan parameter sel satuan a = 5,5396 Å, b = 5,5800 Å, c = 40,9734 Å. Senyawa ini memiliki tingkat kristalinitas lebih bagus dan yang lebih tinggi daripada oksida logam sejenis yang dihasilkan dengan metode reaksi kimia fasa padat. Sifat feroelektrik menunjukan nilai polarisasi remanen Pr(+) 35,10 Ccm-2, Pr(-) 24,10 Ccm-2. Kata kunci: sintesis, oksida logam, Aurivillius, hidrotermal

PEMBUATAN HAND SANITIZER ALAMI DI DESA CEMPAKA BARU KOTA BANJARBARU Komari, Noer; Dwi Rasy Mujiyanti; Dewi Umaningrum; Dahlena Ariyani
Jurnal Pengabdian Kepada Masyarakat (MEDITEG) Vol. 6 No. 1 (2021): Jurnal Pengabdian Kepada Masyarakat (MEDITEG)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Tanah Laut (Politala)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/mediteg.v6i1.81

The spread of Covid-19 was out of control and spread throughout Indonesia, including Banjarbaru which had a red zone. Desa Cempaka Baru Kota Banjarbaru is a transmigration settlement that is still safe against Covid-19. Even though it is safe, the community is quite at high risk of contracting it. People are required to comply with health protocols, especially cleaning their hands, including using a hand sanitizer. The demand for hand sanitizers in the market is increasing and the price is also rising, so an alternative is needed to make your own hand sanitizer. The aim of the activity is to educate village communities to make hand sanitizers by utilizing materials around their environment. The activity stages include socialization, implementation of making hand sanitizers, and evaluation. Assistance in the form of hand sanitizer products, hand washing stations, and banners advising the prevention of Covid-19 transmission were also provided to the public. The process of making hand sanitizers was demonstrated by students who helped with activities and involved 15 women who were members of the “Sasirangan Working Group”. The service product is a natural hand sanitizer made from lemongrass and betel leaves. The community was very enthusiastic about participating in this activity and promised to make their own later.

Silica Content Analysis of Rice Husks Siam Unus from South Kalimantan Mujiyanti, Dwi Rasy; Ariyani, Dahlena; Lisa, Muna
Indonesian Journal of Chemical Research Vol 9 No 2 (2021): Edition for September 2021
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2021.9-muj

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 Ariyani, Dahlena; Hilma, Nabila Khairiyatul; Utami, Umi Baroroh Lili; Santoso, Uripto Trisno; Mujiyanti, Dwi Rasy
Indonesian Journal of Chemical Research Vol 11 No 1 (2023): Edition for May 2023
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

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

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.

Effect of Non-Thermal Plasma on Biochar Properties from Sugarcane Bagasse and Banana Peel Dermawan, Denny; Satriavi, Aulia Diva; Nurhidayati, Dyah Isna; Mujiyanti, Dwi Rasy; Novitrie, Nora Amelia; Mayangsari, Novi Eka; Setiawan, Adhi
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 2 (2025): July 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i2.349-359

Biochar produced from agricultural waste, such as sugarcane bagasse and banana peel, has gained significant attention owing to its potential environmental and industrial applications. This study aimed to enhance the physicochemical properties of biochar derived from these wastes using nonthermal plasma treatment. Biochar was produced via pyrolysis combined with non-thermal plasma treatment and then characterized to identify the differences. Characterization was performed using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and–Brunauer–Emmett Teller (Brunauer-Emmett-Teller) surface area analysis to evaluate changes in crystallinity, morphology, functional groups, and surface area. Nonthermal plasma treatment significantly altered the surface morphology of biochar, increasing its porosity and surface area. The BET surface area of sugarcane bagasse waste was 0.061 m²/g, which expanded to 87.50 m²/g after changing to biochar, whereas banana peel waste had a BET surface area of 0.007 m²/g, which increased to 427.2 m²/g after changed to biochar. The pyrolysis process on both biochars also reduced OH (hydroxyl) transmittance, as evidenced by FTIR analysis, which indicated water evaporation. Non-thermal plasma treatment substantially improved the physical and chemical properties of biochar compared to untreated biomass.

Organo-Silica Membrane Prepared from TEOS-TEVS Modified with Organic-Acid Catalyst for Brackish Water Desalination Elma, Muthia; Lestari, Aptar Eka; Sumardi, Anna; Assyaifi, Zaini Lambri; Darmawan, Adi; Mujiyanti, Dwi Rasy; Syauqiah, Isna; Rahma, Aulia; Suciwati, Linda; Mawaddah, Yanti
Jurnal Rekayasa Kimia & Lingkungan Vol 16, No 1 (2021): Jurnal Rekayasa Kimia & Lingkungan (June, 2021)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v16i2.18107

The sol gel process is one of the processes used in the manufacture of thin films on membranes because it can control the pore size in the resulting silica matrix. In addition, another way to build membrane size can be done by adding catalysts and precursors to be used. In this study, using a combination of tetraethyl ortho silicate (TEOS) and triethoxy vinyl silane (TEVS) precursors and citric acid as a catalyst to produce a silica matrix with mesoporous size so that it is suitable for application in the desalination process. The organo silica membrane was calcined at 350 C for 1 hour using the RTP calcination technique under vacuum, thus preventing the decomposition of carbon in the silica matrix. The membrane was dipcoated 4 times to obtain 4 layers. The FTIR (Fourier-transform Infrared Spectroscopy) test was carried out to see the functional groups on xerogel, namely silanol, siloxane and carbon. In addition, the performance of this membrane is carried out by desalination through pervaporation using 0.3% NaCl feed water with variations in feed air temperature, namely 25, 40and 60. The resulting flux of air value increased with increasing feed water temperature, namely 6.1; 11.2; and 12.1kg.m-2h-1while the resulting salt rejection was 99.72; 99.64 and 99.23%. So that the organo silica membrane is suitable when applied to the desalination process through pervaporation.

Co-Authors Adhi Setiawan Adi Darmawan Adi Maulana Anna Sumardi Aptar Eka Lestari Assyaifi, Zaini Lambri Aulia Rahma Azidi Irwan Chairul Irawan Dahlena Ariyani Denny Dermawan Dewi Umaningrum Edi Mikrianto Eko Sri Kunarti Hari Fitra Hilma, Nabila Khairiyatul Isna Syauqiah Isna Syauqiah Karlini Karlini Lestari, Aptar Eka Linda Suciwati Lisa, Muna Maria Dewi Astuti Mawaddah, Yanti Messy Risna Muhammad Agus Muljanto Muthia Elma Noer Komari Normilawati Normilawati Novi Eka Mayangsari Novitrie, Nora Amelia Nurhidayati, Dyah Isna Nuryono Nuryono Nuryono Nuryono Radna Nurmasari Rahma, Aulia Ricky Kurniawan Risnu Aritofa Rodiansono Rodiansono Satriavi, Aulia Diva Suciwati, Linda Sumardi, Anna Taufiqurohman Taufiqurohman Umi Baroroh Lili Utami Uripto Trisno Santoso Utami Irawati Yanti Mawaddah Yunitawati Yunitawati Zaini Lambri Assyaifi

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