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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Dasar Jurnal Fisika FLUX Indonesian Journal of Chemistry Chemistry Indonesian Journal of Chemical Research Jurnal Ilmiah Berkala: Sains dan Terapan Kimia JOURNAL OF WETLANDS ENVIRONMENTAL MANAGEMENT Molekul: Jurnal Ilmiah Kimia

Radna Nurmasari

Program Studi Kimia FMIPA Universitas Lambung Mangkurat Jl. A. Yani Km. 35,8 Banjarbaru 70714 Kalimantan Selatan

Author-ID : 4090411

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics

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KAJIAN ADSORPSI KROM(III) PADA BIOMASSA TANDAN KOSONG KELAPA SAWIT Radna Nurmasari
Jurnal Sains dan Terapan Kimia Vol 2, No 2 (2008)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Kajian adsorpsi Cr(III) pada biomassa tandan kosong kelapa sawit (TKKS) telah dilakukan. Karakterisasi gugus fungsi biomassa TKKS dianalisis menggunakan FTIR. pH dan waktu optimum ditentukan berdasarkan jumlah maksimum Cr(III) yang dapat diadsorpsi oleh TKKS. Adsorpsi Cr(III) dilakukan dalam sistem batch selama satu jam pada variasi konsentrasi ion logam. Ion logam yang teradsorpsi dihitung dari selisih konsentrasi ion logam dalam larutan setelah dan sebelum adsorpsi berdasarkan analisis dengan metode SSA. Adsorpsi Cr(III) secara optimum dicapai pada pH 4 (88%), dengan waktu kontak optimum 60 menit (70,79%). Persen recovery Cr(III) dari biomassa TKKS pada metode batch sebesar 34%, sedangkan pada metode kolom sebesar 25,93%. Kata kunci : Adsorpsi, biomassa, tandan kosong kelapa sawit (TKKS), Cr(III)

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

The Coated-Wire Ion-Selective Electrode (CWISE) of Tartrazine Using Chitosan as an Ionophore Dewi Umaningrum; Radna Nurmasari; Siti Hasnah; Maria Dewi Astuti; Kiki Amalia Wardhani; Shofia Qalby
Jurnal Kimia Sains dan Aplikasi Vol 24, No 6 (2021): Volume 24 Issue 6 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Research on the Ion-Selective Electrode (ISE) of coated wire-type tartrazine using chitosan as an ionophore has been developed. The variables used in the manufacture of ISE are membrane composition and immersion time. Meanwhile, the basic characteristics of ISE measured are Nernst value, measurement concentration range, detection limit, and measurement response time. The results showed that ISE tartrazine coated wire type had an optimum membrane composition in a mixture of chitosan: PVC: DOP of 3: 34: 63 (% w/w) and a membrane immersion time 20 minutes. The basic characteristics of ISE produce a Nernst value of 20.976 mV/decade. The measurement concentration range is 1×10-7-1×10-2 M with a detection limit of 2.749×10-7 M or 0.1469 ppm. The response time ranges from 10-60 seconds, with an average of 40 seconds.

Syntesis of Glutardehide Crosslinked Superporous Chitosan with Polyphynil Alcohol Addition for Peat Water Humic Acid Absorption Dahlena Ariyani; Uripto T Santoso; Radna Nurmasari; Utami Irawati; Iriansyah Iriansyah
Journal of Wetlands Environmental Management Vol 3, No 2 (2015): July-December
Publisher : Center for Journal Management and Publication

This research aims to synthezise the superporous adsorbent from chitosan using glutaraldehyde as a cross linker, NaHCO3 as a porogen, and polyvinyl alcohol (PVA) as a reinforcing agent. Generally, the reaction of adsorbent synthesis was carried out through four steps: (1) the addition of PVA to the chitosan solution, (2) the addition of porogen, (3) the crosslinking of chitosan, and (4) the releasing of porogen. The obtained adsorbents were characterized by Fourier Transform Infra Red (FTIR) Spectroscopy, photograph of Digital Microscope (DM), and Scanning Electron Microscopy (SEM) to measure the porosity. The adsorbent was then be applied to adsorb of HA for adsorption capacity determination. The results showed that the addition of PVA and porogen during adsorbent synthesis has produced adsorbent with more compact and flexible physical properties and greater porosity. The adsorption test showed that the adsorption capacity of KPG is 33.07 mg/g. However, if the amount of used adsorbent is larger (based on the chitosan mass 1 g), the capacity adsorption of KPG is 141.74 mg/g. The initial concentration of HA contained in peat water was 45.64 mg/L, KPG can adsorb of HA as much as 95%.

Adsorption of Congo Red onto Humic Acid Isolated from Peat Soil Gambut Regency, South Kalimantan Umaningrum, Dewi; Nurmasari, Radna; Santoso, Uripto Trisno; Astuti, Maria Dewi; Pradita, Hapsari Tyas
Molekul Vol 18 No 2 (2023)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2023.18.2.8685

Humic acid is one of the green materials for wastewater treatment including for removal dyes as an adsorbent. Humic acid was isolated from peat soil, Gambut Regency, South Kalimantan following International Humic Substances Society method, and used to adsorb Congo red. The adsorption process was carried out in a batch system and the effect of pH, contact time, and adsorption capacity of Congo red on humic acid were studied. The adsorbent characterization by using FTIR. The results showed that the adsorption of Congo red on humic acid occurred at the optimum pH of pH 6, the optimum contact time was 120 minutes. The adsorption capacity of Congo red onto humic acid of 33.33 mg/g and follows the Langmuir model with R2 = 0.9926. The characterization of humic acid functional groups before and after adsorption of Congo red showed that the signal at 1,712.79 cm-1 were shifted to 1,705.07 cm-1 and 1,273.02 cm-1 were shifted to 1,265.30 cm-1. These suggested that the mechanism interaction was the electrostatic interaction between -NH3+ functional group of Congo red group and -COO- functional group of humic acid. It means that humic acid isolated from peat soil could be used as an adsorbent for the removal Congo red.

Variation of Iodine Mass and Acetylation Time On Cellulose Acetate Synthesis From Rice Straw Umaningrum, Dewi; Astuti, Maria Dewi; Nurmasari, Radna; Hasanuddin, Hasanuddin; Mulyasuryani, Ani; Mardiana, Diah
Indonesian Journal of Chemical Research Vol 8 No 3 (2021): Edition for January 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.2021.8-dew

Cellulose acetate is a membrane material that can be used in the sensor field. One source of cellulose acetate is from rice straw. This study aimed to study the effect of iodine mass and acetylation time on cellulose acetate synthesis from rice straw. The initial step is to isolate cellulose from rice straw, followed by cellulose acetate synthesis using iodine catalyst by varying the amount of iodine as much as 0.1-0.3 grams and acetylation time for 1 until 5 hours. The cellulose acetate was characterized using an infrared spectrophotometer, and its viscosity was determined. The result shows that the cellulose 33.63%. The maximum time of cellulose acetate acetylation is 2 hours with a mass of iodine 0.2 g. The yield of cellulose acetate was 14.98%, with an acetyl value of 19.11% and a degree of substitution of 0.89. The cellulose acetate produced has a low viscosity. The FTIR characterization of cellulose acetate shows O-H functional groups at 3333 cm-1, C-H functional groups at â€‹â€‹2897 cm-1, carbonyl functional groups at 1722 cm-1 C-O functional groups at 1029 cm-1 that were identical in cellulose acetate compounds. The amount of iodine and the acetylation time affected the cellulose acetate product.

Co-Authors A Abdullah Amelia Harianti Ani Mulyasuryani Azidi Irwan Bambang Rusdiarso Dahlena Ariyani Devia Salastiansyah Elwaty Dewi Umaningrum Dewi Umaningrum Diah Mardiana Diah Mardiana Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Siswanta Edi Mikrianto Eka Yuliyanti Hari Fitra Hasanuddin Hasanuddin Iriansyah Iriansyah Iriansyah Iriansyah, Iriansyah Kamilia Mustikasari Kholifatu Rosyidah Kiki Amalia Wardhani Mahrita Wulandari Mardhatillah Mardhatillah Maria Dewi Astuti Maulisa Rahmah Messy Risna Nurhikmah Nurhikmah Pradita, Hapsari Tyas Rahmat Yunus Shofia Qalby Siti Hasnah Sri Juari Santosa Taufiqur Rohman Uripto T Santoso Uripto T Santoso, Uripto T Uripto Trisno Santoso Utami Irawati Yudhistira Abdi Atmanegara Yunita Yunita Yunita Yunita Yunitawati Yunitawati

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