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All Journal EKSAKTA: Journal of Sciences and Data Analysis JPSCR : Journal of Pharmaceutical Science and Clinical Research Walisongo Journal of Chemistry Jurnal Pijar MIPA

Febi Indah Fajarwati

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Islam Indonesia

Author-ID : 2912504

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Environmental Science Materials Science & Nanotechnology Mathematics Physics Public Health

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Articles

Film Of Chitosan-Carboxymethyl Cellulose Polyelectrolyte Complex as Methylene Blue Adsorbent Febi Indah Fajarwati; Eko Sugiharto; Dwi Siswanta
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 16, ISSUE 1, February 2016
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol16.iss1.art5

Telah dilakukan pembuatan film kompleks polielektrolit kitosan-karboksimetil selulosa (CMC) untuk pengujian pengaruh rasio volume CMC:kitosan (1:1; 3:2; 7:3). Karakterisasi film dilakukan dengan uji kuat tarik, medium asam basa, dan penyerapan air serta dilakukan uji adsorpsi terhadap biru metilen. Hasil Karakterisasi menunjukkan sifat mekanik film menurun dengan bertambahnya jumlah karboksimetil selulosa dan film stabil pada pH >4. Kondisi optimum adsorpsi diperoleh pada film F3 (ratio volume CMC:kitosan 7:3) dengan kapasitas adsorpsi sebesar 8,38×10-5 mol/g selama 30 menit.

Adsorption Study of Methylene Blue and Methyl Orange Using Green Shell (Perna Viridis) Febi Indah Fajarwati; Nadya Ika Yandini; Mai Anugrahwati; Amri Setyawati
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 1, February 2020
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol1.iss1.art14

Green shell is generally disposed of and become environmental contaminants. In this study, the green shell was used as material to adsorb dyes residue: methylene blue and methyl oranges. Green shell waste from seafood was prepared by removing the dirt then dried at room temperature. It was followed by roughly crushing before being placed in the furnace at temperatures of 300, 500, 700 and 900 °C. The selected adsorbents were sieved at 200 mesh. The adsorbents were characterized by FTIR and SEM-EDX to evaluate their functional groups and morphology. Furthermore, the adsorption process was evaluated by determining the kinetic adsorption models. The results of the FTIR characterization showed the vibration of Ca(OH)2 bone at a wave number of 3400 cm-1 and morphological analysis by SEM showed a homogeneous surface. Adsorption kinetics results obtained from the variation of time with the initial adsorbate concentration showed the kinetic model of both methylene blue and methyl orange adsorption onto the adsorbent followed a pseudo-second order.

Characteristic comparison of cornstarch-based bioplastics using kaolin, microcrystalline cellulose and chitosan as fillers Mai Anugrahwati; Meilani Dwi Putri Nasution; Febi Indah Fajarwati
Jurnal Pijar Mipa Vol. 17 No. 1 (2022): January 2022
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram

In the study, the basic material for making bioplastics was corn starch with the addition of kaolin, microcrystalline cellulose, and chitosan as filler variations, as well glycerol as a plasticizer. The method used was the blending method. The characterization included the absorption test for water resistance, biodegradation test, tensile and elongation strength test, and functional group analysis using FTIR. Among fillers, the best bioplastic characteristic bioplastic was obtained with filler kaolin with the water absorption value of 88.62%, a tensile strength value of 1.44 x10-3 MPa, and the elongation strength value of 5.04%. Nearly 80% of the material was degraded in 15 days. Spectra of FTIR showed the appearance of some functional groups from starch, filler, and plasticizer, which meant that the process of bioplastic manufacturing was physical mixing.

Penghilangan Zat Warna menggunakan Kompleks Polielektrolit Kitosan-Alginat Febi Indah Fajarwati; Muhammad Arsyik Kurniawan; Mayla Nur Fatima; Rosani Fikrina
JPSCR: Journal of Pharmaceutical Science and Clinical Research Vol 3, No 1 (2018)
Publisher : Universitas Sebelas Maret

Telah dilakukan sintesis kompleks polielektrolit (PEC)kitosan-alginat dalam bentuk film dan beads. Material dibuat dengan menggunakan biopolimer kitosan dan alginat yang bersifat ramah lingkungan untuk pengujian adsorpsi terhadap zat warna. Karakterisasi PEC kitosan-alginat dilakukan dengan FTIR(Fourier Transform Infra Red), uji stabilitas medium asam basa serta uji kapasitas adsorpsi terhadap zat warna. Hasil karakterisasi menunjukan terjadinya pergesaran vibrasi pada hasil sintesis yang semakin tajam dan PEC kitosan-alginat stabil pada pH >4. Kapasitas adsorpsi optimum diperoleh sebesar 0,676 mg/g pada menit ke- 45 untuk PEC kitosan-alginat dalam bentuk beads dan 0,0135 mg/g pada menit ke-30 untuk bentuk film. Model kinetika semua adsorbenmenunjukkan mengikuti orde dua semu.

The effect of essential oil concentrations on particle size of kencur (Kaempferia galanga L.) nanoemulsions with maltodextrin and tween 80 as emulgators Amri Setyawati; Febi Fajarwati Indah; Yuniar Kusuma Ardani
Jurnal Pijar Mipa Vol. 17 No. 4 (2022): July 2022
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram

Kencur (Kaempferia galanga L.) essential oil nanoemulsion was proposed to replace baby powder which has been banned in several countries. This study aimed to determine the effect of various kencur essential oil concentrations on particle size and to measure their stability during storage. This research was initiated by examining essential oil quality and followed by the formulation of nanoemulsion with maltodextrin and tween 80. PSA characterized it, and stability was observed for six weeks. The results showed that the essential oil of kencur was of good quality with a clear yellow color oil, a distinctive odor of kencur, 0.933 g/mL of density, and a 1.480 refractive index value. This value is considered standard in Indonesia's National standards (SNI) of essential oil. The L1, L2, L3, and L4 nanoemulsion formulas have particle sizes: 20.4 nm, 20.3 nm, 21.7 nm, and 26.2 nm, respectively. L1 (0.475) is chosen as the best formula based on the PI value. The formulas showed good stability and homogeneity for six weeks of storage. Its pH is also persistent at room temperature (30 °C) or in refrigerator storage (7 °C).

Rhodamine-B Dyes Adsorption by Beads Alginate Rahayu Rahayu; Adriani Bandjar; Ninditha Clourisa Amaris Susanto; Febi Indah Fajarwati; Nguyen Thi Thanh Phuong
Walisongo Journal of Chemistry Vol 5, No 1 (2022): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v5i1.9094

Research has been carried out on the adsorption of rhodamine-b dye by alginate beads. The production of alginate granules was carried out at a concentration of 3.5% alginate powder. Identification of functional groups was carried out by FT-IR and water absorption test resulted in a maximum capacity of 96.24% at 90 minutes. Determination of adsorption capacity was carried out by UV-VIS spectrophotometer at a maximum contact time of 30 minutes and a maximum pH at pH 7, and resulted in adsorption maximum concentration at 30 ppm is 15.954 mg/L with adsorption capacity of 4.7862 mg/g

Kinetics study of copper (Cu) and chromium (Cr) adsorption using green mussel shells (Perna viridis) adsorbent Febi Indah Fajarwati; Asfiya Mahanani; Mai Anugrahwati
Jurnal Pijar Mipa Vol. 18 No. 1 (2023): January 2023
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v18i1.4613

Research has been carried out on making green mussel shell adsorbents to absorb Cu and Cr metals. The study of making green mussel shell adsorbents was carried out by thermal activation using a furnace. The results of the activated adsorbent were characterized using FTIR and SEM-EDX. Furthermore, the adsorbent was used to absorb Cu and Cr metal by using several variations, namely variations in the temperature of the adsorbent activation, adsorbent weight, pH, and contact time, and knowing the kinetic model by determining the reaction order. The results obtained from the characterization of green mussel shells contain elements of Ca, about 67.56% at an activation temperature of 500 °C and 67.34% at an activation temperature of 900 °C. The optimum conditions for Cu metal adsorption by green shell adsorbent were obtained at an activation temperature of 500 °C, using an adsorbent of 1 gram under pH 10 and a contact time of 40 minutes. Whereas for Cr metal absorption, the activation temperature was 900 °C, the mass used was 1.5 grams with pH 7 and the contact time was 40 minutes. The adsorption kinetics model of green mussel shells adsorbent on Cu and Cr metals followed pseudo-second-order.

Co-Authors Adriani Bandjar Amri Setyawati Asfiya Mahanani Dwi Siswanta Eko Sugiharto Mai Anugrahwati Mayla Nur Fatima Meilani Dwi Putri Nasution Muhammad Arsyik Kurniawan Nadya Ika Yandini Nguyen Thi Thanh Phuong Ninditha Clourisa Amaris Susanto Rahayu Rahayu Rosani Fikrina Yuniar Kusuma Ardani

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