Article Per Year (5 Year)
p-Index From 2021 - 2026
2.177
P-Index
This Author published in this journals
All Journal AL KAUNIYAH Jurnal Kimia Riset Jurnal Sains Teknologi dan Lingkungan (JSTL) Sains Natural: Journal of Biology and Chemistry Chemistry Indonesian Journal of Chemical Research Jurnal Pendidikan dan Pembelajaran Sains Indonesia (JPPSI) Edubiotik : Jurnal Pendidikan, Biologi dan Terapan Molekul: Jurnal Ilmiah Kimia Jurnal Studi Guru dan Pembelajaran Jurnal Pendidikan dan Pembelajaran Sains Indonesia (JPPSI) Jurnal Ilmiah Berkala: Sains dan Terapan Kimia JURNAL AGROINDUSTRI HALAL Jurnal Abdi Inovatif : Pengabdian kepada Masyarakat
Gladys Ayu Paramita Kusumah Wardhani
Program Studi Kimia Universitas Nusa Bangsa
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Public Health Social Sciences Other

Published : 17 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 17 Documents
Search

 1   2 
Pembuatan Nanopartikel CaO dari Cangkang Telur Ayam Menggunakan Ekstrak Etanol Daun Salam (Syzygium polyanthum): Synthesis of CaO Nanoparticles from Chicken Eggshells Using Ethanol Extract of Bay Leaves (Syzygium polyanthum) Mellida Yani; Gladys Ayu Paramita Kusumah Wardhani; Agus Taufiq
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 9 No. 1 (2023): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v9i1.408

Abstract

Chicken  eggshell  waste  contributes  to  environmental because it have CaCO3 content. Calcium  carbonate  in chicken  eggshells  is  used  as  a  basic  material  in  the  synthesis  of  CaO  nanoparticles  through  a calcination process at 900oC. CaO nanoparticles have unique characteristics that make them are needed for various fields of application such as environment, materials, and biomedicine. In addition, the synthesis of these nanoparticles can reduce the use of hazardous and environmentally friendly chemicals. This method has been widely used as an alternative method, one of which  utilizes  secondary  metabolites found  in  ethanol extract of  bay  leaves as reducing  and stabilizing agents. This research was conducted with 3 volume variations of bay leaf extract with calcined eggshell base materials, namely 3:7, 5:5, and 7:3 (v/v) to determine the effect on the resulting particle   size.   Characterization   of   CaO   nanoparticles   using   UV-Vis,   FTIR,   and  SEM.   The nanoparticles obtained were in the form of white fine powder. The characterization results show the maximum absorption of CaO nanoparticles at λ 215 - 270 nm. Based on the FTIR spectra, Ca-O bonds can be identified in the three variations at 712 cm-1  dan 514 cm-1  and  874 cm-1  shows Ca-O-Ca bond. The resulting material has a flake shape and agglomeration morphology with an average particle size range of 43-498 nm.
Bio-oil Quality Based on Coconut Carbon Biomass Using Pyrolisis Method Ratnasari, Rifa; Wardhani, Gladys Ayu Paramita Kusumah; Taufiq, Agus
Indonesian Journal of Chemical Research Vol 12 No 2 (2024): Edition for September 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-rif

Abstract

Coconut shells are biomass composed of carbon, hydrogen, oxygen, nitrogen, and other components in small quantities. Biomass can be converted into bio-oil via the pyrolysis method. Bio-oil resulting from pyrolysis has poor quality because it contains oxygen, acid compound, ketone, and ester. To improve the quality of Bio-oil, the pyrolysis process is carried out through a catalytic esterification reaction using a sulfonated H2SO4 coconut shell charcoal catalyst. Bio-oil synthesis is carried out at a temperature of 300–500 ℃. Coconut shell acid catalyst preparation was carried out by activation using HCl and followed by sulfonation of H2SO4 at a temperature of 150℃ for 12 hours. The catalyst was characterized using XRD, FTIR, and SEM. The bio-oil obtained was tested for density, kinematic viscosity, water content, pH, ash content, acid value, Bio-oil composition using GCMS, and metal content using ICP-OES. The results of catalyst characterization show that the formed solid carbon-based catalyst from coconut shells has a graphite crystal structure with a densely porous surface and contains sulfonate functional groups. The yield of bio-oil produced was 6.4%.
Silica Gel From Bagasse Ash for Methylene Blue Adsorption Anisara, Raisa; Wardhani, Gladys Ayu Paramita Kusumah; Taufiq, Agus
Sains Natural: Journal of Biology and Chemistry Vol. 14 No. 3 (2024): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v14i3.738

Abstract

Most silica sources are from non-renewable natural sand or rock materials, which affect the element's diminishing availability in the environment. Because bagasse ash has a relatively high silica concentration, it can be used as a silica source to manufacture silica gel. HCl is added during the sol-gel process of silica gel synthesis. The silica gel's characterization employs FTIR, XRD, and SEM instruments. Characterization results showed that silica gel contains silanol groups identified by the appearance of vibrations at the wavenumber of 3383,93 cm-1 and 1635,17 cm-1. Vibrations of the siloxane group appear at the wavenumber of 1020,83 cm-1 and 579,88 cm-1. Silica gel diffractogram showing dilated diffraction peaks at 2q = 22,90ᵒ. Silica gel has potential as an adsorbent in adsorbing methylene blue dye. The ideal parameters for the methylene blue adsorption process are pH 10 and 45 minutes of contact time., silica gel weight of 0.1 g, and methylene blue concentration of 100 mg/L. Using the Langmuir isotherm rule, the silica gel of bagasse ash has a high adsorption capacity of 56.818 mg/g.
PENDAMPINGAN PRODUKSI YOGHURT UNTUK PENINGKATAN NILAI JUAL SUSU KELOMPOK TANI TERNAK SAPI (KTTSP) DESA SITU UDIK, CIBUNGBULANG, BOGOR Hutagaol, Ricson Pemimpin; Susanty, Devy; Rumna, Rumna; Widhyastini, I Gusti Ayu Manik; Wardhani, Gladys Ayu Paramita Kusumah; Oksari, Ade Ayu
Jurnal Abdi Inovatif : Pengabdian kepada Masyarakat Vol. 3 No. 2 (2024): Jurnal Abdi Inovatif : Pengabdian kepada Masyarakat
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jai.v3i2.727

Abstract

The Bogor Regency dairy cattle livestock business area (KUNAK) is in Cibungbulang District, one of the livestock areas, and the product is cow's milk. The cow's milk produced is sold directly to consumers or milk producers. The selling value of fresh cow's milk is lower than processed cow's milk, and fresh cow's milk has the risk of being easily damaged, resulting in losses for farmers. This Community Service (PKM) activity aims to assist farmers in handling their processed milk production by making yogurt for the Cattle Farmers Group (KTTSP). The approach is in the form of an initial survey regarding partner problems, formulating solutions, providing assistance, and analyzing the partner's level of understanding. This community service activity results in an increase in partners' knowledge of dairy products and how to make them before and after the activity. Apart from that, partners can also increase the selling value of pure cow's milk through processed products in the form of yogurt with a delicious taste and attractive packaging, thereby increasing the selling value of the product.
Adsorption Condition of Geopolymer Synthesized from Corncob Ash Using NaOH and NaSiO for Methylen Blue Removal Wardhani, Gladys Ayu Paramita Kusumah; Yahya, Amri
Sains Natural: Journal of Biology and Chemistry Vol. 15 No. 1 (2025): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v15i1.764

Abstract

In this study, geopolymer G10 based corncob ash were synthesized by alkaline activation using NaOH 10 M-Na2SiO3(2:1) with ratio 5:3. The G10 were characterized by X-Ray fluorescence (XRF) and Fourier transform infrared spectroscopy (FTIR) and applied to methylene blue adsorptiom in an aqueous media  in batch method. Adsorption efficiency were observed in optimum pH, contact time, adsorbent weight, and methylene blue concentration using UV-Visible spectrophotometer. The resulting geopolymer is brown at a drying temperature of corncob powder at 80 ℃. Based on the XRF results, the Si:Al ratio value in corncob ash was 3:1. The bonds in the geopolymer include, Si-O-Si, Si-O-Al, Si-OH, and Al-O-Si. Optimum adsorption conditions were obtained at pH 3, contact time at 120 menit, adsorben weight is 50 mg, and initial concentration of methylene blue is 200 mg/L.
Green Synthesis of CaO Nanoparticle from Chicken Eggshell using Lemongrass Leaf Water Extract Wardhani, Gladys Ayu Paramita Kusumah; Ariesta, Nina
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i1.17859

Abstract

Sources of CaO in the synthesis of nanoparticles can be available from waste such as eggshell waste which has an average CaCO3 content of 94%. The study aimed to synthesize nanoparticles with various compositions of CaO-0 and CaO-1  (50 : 50) yielded from chicken egg shells mediated by extracts Cymbopogon citratus leaves and characterized the nanoparticles. Based on the results of phytochemical screening, Cymbopogon citratus extract contained alkaloids, flavonoids, triterpenoids, and tannins. The results of characterization with UV-Vis spectrophotometer showed that CaO was formed at the highest wavelength with a composition of CaO-1 (50 : 50) with a value of 250-300 nm. Absorption band of FT-IR spectra at wave numbers 428 cm-1 and 711 cm-1, it’s indicate of Ca-O vibrational band and Ca-O bonds, respectively. The particle size of crystalline CaO-0 based on calculations using the Debye Scherrer formula ranged from 33.72 - 38.48 nm while the particle size of crystalline CaO-1 ranged from 28.93 - 70.75 nm with diposide and calcite phases based on XRD data. The surface morphology using SEM shown that CaO-0 was shaped like an irregular cube while CaO-1 forms irregular spherical lumps. Keywords: CaO, green synthesis, Cymbopogon citratus, nanoparticle .
Biodiesel from Avocado Seed Oil with CaO and CaO Super Basa Catalyst from Egg Shell Waste Choerunnas, Paqih; Nurhayati, Lany; Devy Susanty; Wardhani, Gladys Ayu Paramita Kusumah
Sains Natural: Journal of Biology and Chemistry Vol. 14 No. 1 (2024): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v14i1.591

Abstract

One waste that can be used as raw material for biodiesel is avocado seeds. Generally, biodiesel from avocado seed oil is synthesized using a homogeneous base catalyst, NaOH or KOH. However, the yield of Free Fatty Acids (FFA) is still low, so it is necessary to make biodiesel using heterogeneous base catalysts such as calcium oxide (CaO) and super base CaO from eggshell waste. Avocado seed oil biodiesel was synthesized using the method of transesterification with a ratio of 1:6, and a super base CaO/CaO catalyst of 1.5% (w/w) of the weight of avocado seed oil was added. The use of the CaO catalyst produced a Fatty Acid Methyl Ester (FAME) of 98.21% with a biodiesel yield of 73.77%, while the use of a super base CaO catalyst produced a FAME of 98.47% with a biodiesel yield of 74.50%. Characterization of biodiesel using FTIR shows the presence of methyl, ether, alcohol, carbonyl, and ester functional groups (C=O and C-O bonds), which are characteristics of the resulting biodiesel trans-esterification. Based on the yield and physical and chemical properties, the avocado seed oil biodiesel produced is better using the super base CaO catalyst than the CaO catalyst.
Co-Authors Ade Ayu Oksari Agus Taufiq Agus Taufiq Alifah Nuranzani Amri Yahya Anisara, Raisa Choerunnas, Paqih Devy Susanty Faridha Faridha Hastuti, Lisnawati Tri Hutagaol, Ricson Pemimpin I Gusti Ayu Manik Widhyastini Irvan Fadli Wanda Lany Nurhayati Lisnawati Tri Hastuti Mellida Yani Mia Azizah Nia Yuliani Nina Ariesta Nurlela, Nurlela Putri Hawa Syaifie Ratnasari, Rifa Rumna, Rumna Taufiq, Agus Tiva Lathifah