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All Journal Indonesian Journal of Chemistry Communications in Science and Technology Chemistry Indonesian Journal of Chemical Research Biota INTEK: Jurnal Penelitian INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY Jurnal Teknologi Kimia Mineral MARSEGU : Jurnal Sains dan Teknologi JURNAL REKAYASA KIMIA & LINGKUNGAN

Indah Raya

Department Of Chemistry. Faculty Of Mathematics And Natural Sciences, Hasanuddin University, Ujung Pandang

Author-ID : 358872

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Energy Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology

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Articles

Sintesis Nanopartikel Fe Menggunakan Bioreduktor Ekstrak Fitoplankton Spirulina platensis Nurillah, Isti; Raya, Indah; Maming, Maming
Indonesian Journal of Chemical Research Vol 3 No 2 (2016): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.3-ist

This study aims to synthesize Fe nanoparticles by bioreduction using the phytoplankton extract of S. platensis that acts as a reducing agent. Synthesis process is done by adding extracts of S. platensis to a solution of 1 mM FeCl3. The formed nanoparticles characterized by UV-Vis spectrophotometer, Fourier Transform Infra Red Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Energy Disperse X-Ray Spectroscopy (EDX/EDS), X-Ray Diffraction (XRD) and X-Ray Flourosence (XRF). The results showed that the solution of Fe3+ ions can be reduced by phytoplankton extract of S. platensis Fe nanoparticles formed. The average size of the particles based on the Debye-Scherrer equation was 68.10 nm. While the morphology of Fe nanoparticles was spherical shape.

Modifikasi Katalis CaO Untuk Produksi Biodiesel Dari Minyak Bekas Gani Rachim, St. Annisa; Raya, Indah; Zakir, Muhammad
Indonesian Journal of Chemical Research Vol 5 No 1 (2017): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2017.5-sit

Research about modification of CaO catalyst to produce biodiesel has done. This research aims to know the effectiveness of CaO-ZnCl2 belong to ASTM D6751 to get a yield biodiesel. Modification of the CaO with ZnCl2 was conducted by impregnation method using methanol and n-hexane. For synthesis biodiesel, methanol is used as solvent and Waste Cooking Oil (WCO) as raw material. Ratio molar of WCO and methanol is 12:1 with 3% CaO-ZnCl2 added. This reaction is carried out at a temperature of 65oC. the biodiesel is characterized by Fourier Transform Infrared (FT-IR) to determine the presence of ester groups formed. The yield percentage of biodiesel produced is 77.94%. The characterization of biodiesel properties consist of acid number is 73.38 mg KOH/g, density is 0.9038 and water content is 0.0053%.

Characterization and electrochemical properties analysis of reduced graphene oxide from corncob carbon as an electrode candidate: Synthesized using modified Hummers method Eka Anggriani Odja; Raya, Indah; Maming; Muhammad Zakir; Abd. Karim; Djabal Nur Basir
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1365

This research aims to synthesize and characterize reduced graphene oxide (RGO), as well as analyse its electrochemical properties. The synthesis of RGO material from corn cobs went through several stage: carbonization, oxidation and reduction. The synthesis of RGO used a modified Hummer method, and was reduced using the reducing agent ascorbic acid. The synthesized RGO was then characterized using Fourier Transform Independent Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Energy Dispersive Spectroscopy (EDS). Electrochemical analysis using the cyclic voltammetry method, the specific capacitance value obtained showed that RGO had a higher capacitance value than GO. The research results showed that carbon from corn cobs, which has not been utilized optimally, can be synthesized as a basic material for making RGO as a quite promising material.

Piper crocatum and Aloe vera Difference Effectiveness in Complementary Treatment of Perineal Wounds Mubayyina, Firdaus; Alam, Gemini; Usman, Andi Nilawati; Ahmad, Mardiana; As’ad, Suryani; Raya, Indah
Biota Vol 15 No 1 (2022)
Publisher : Universitas Islam Negeri Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/jb.v15i1.409

Indonesia, with a maternal mortality rate (MMR) of 305 per 100,000 live births, is directly caused by post-partum hemorrhage (30.3%) and hypertension (27.1%). At the same time, post-partum infection ranks second as a contributor to maternal death after bleeding. Data from the Indonesian Demographic Health Survey (IDHS) showed that the incidence of perineal laceration or rupture was experienced by women who gave birth vaginally (75%). The prevalence of women who experience perineal tears is in the 25-30 years (24%) and women aged 32-39 years (62%). This study aimed to examine the differences in the effectiveness of Piper crocatum and Aloe vera in the complementary treatment of perineal wound healing in post-partum mothers. This study was a quasi-experimental pretest-posttest control group design with a total sampling method with a ratio of 1:1:1 for as many as 30 post-partum mothers with grade I and II injuries according to inclusion criteria with Intervention group red betel stew, aloe vera, and the Control group with perineal injuries at Gunung Sari Health Center and Sesela Health Center. The data observed were the degree of perineal wound healing using the REEDA scale (Redness, Edema, Ecchymosis, Discharge, and Approximation). The results showed differences in the effectiveness of Piper crocatum and aloe vera on perineal wound healing. The average results of the Mann-Whitney statistical test were on the 5th and 7th days (p-value< 0.005). This study shows that Piper crocatum can accelerate the healing of perineal wounds and become an alternative, complementary therapy in perineal wound healing.

KARAKTERISTIK KIMIA DAN SENSORI KUKIS BERBAHAN BAKU TEPUNG MOCAF DENGAN TAMBAHAN PUREE JAGUNG KUNING Raya, Indah; Augustyn, Gelora; Lopulalan, Cynthia
MARSEGU : Jurnal Sains dan Teknologi Vol. 1 No. 1 (2024): MARSEGU : Jurnal Sains dan Teknologi
Publisher : PT. BARRINGTONIA ASIATICA LESTARI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69840/marsegu/1.1.2024.38-48

Mocaf (Modified Cassava Flour) is flour from modified cassava. Mocaf flour has a high carbohydrate content so it is necessary to add other nutritional sources to enrich the product produced. Corn puree is an alternative for producing cookies with high nutritional value. The aim of this research was to determine the best concentration of mocaf cookies with the addition of sweet corn puree. The parameters tested are proximate and sensory tests. The design used was a Completely Randomized Design (CRD) with 1 factor, namely the concentration of corn puree. The analysis results obtained were that the treatment of adding sweet corn puree (20%) was the best addition of sweet corn puree. The chemical test results were water content 1.96%, ash content 2.24%, fat content 17.95%, and protein content 4.34%. In contrast to the carbohydrate content, the best treatment for sweet corn puree (0%) is the carbohydrate content of 77.22%. The results of the sensory test showed that the panelists showed a tendency to like the research cookies.

SINTESIS SENYAWA KOMPLEKS MN(II) N-ETILISOPROPILDITIOKARBAMAT SEBAGAI ZAT ADITIF PADA BAHAN PELUMAS Ranggina, Dian; Raya, Indah; Junianti, Fitri
JURNAL TEKNOLOGI KIMIA MINERAL Vol 2 No 1 (2023): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Politeknik ATI Makassaar

Senyawa N-Etilisopropildiokarbamat dapat disintesis dengan ion logam yaitu Mn (II) dari unsur transisi dalam upaya menemukan zat aditif yang baik untuk bahan pelumas. Senyawa kompleks ditiokarbamat digunakan sebagai zat aditif dalam pelumas dapat mengurangi gesekan sehingga dapat meningkatkan efisiensi bahan bakar kendaraan bermotor. Senyawa kompleks Mn(II)-N-Etilisopropilditiokarbamat disintesis dengan metode in situ, yaitu dengan penambahan 6 mmol N-etilisopropilamin, 6 mmol karbon sulfida, 2 mmol larutan logam MnSO4.H2O dan dilakukan karakterisasi senyawa kompleks dengan penentuan titik didih, analisis UV-Vis, FT-IR, konduktometer serta pengujian kekentalan ini dilakukan dengan menggunakan alat kinematic viscosity bath pada temperatur 40 0C dan 100 0C dengan mengukur waktu alir sampel pada viscosimeter. Data yang diperoleh menunjukkan bahwa sintesis senyawa kompleks Mn(II)-N-Etilisopropilditiokarbamat merupakan senyawa non elektrolit (muatannya = 0) dengan titik leleh 399,9 0C, spektrum hasil analisa UV-Vis menunjukkan puncak pada panjang gelombang 230 nm, 250 nm, 310 nm, analisis FT-IR untuk jarak dekat (4000-300 cm-1) kompleks Mn(II)-N-etilisopropilditiokarbamat terdapat puncak serapan yang kuat pada bilangan gelombang 2970,38 cm-1 yang menyatakan bahwa senyawa tersebut mempunyai gugus C-H alifatik dengan diperkuat oleh adanya serapan gugus metilen pada 1473,62 cm-1 dan gugus metil pada 1411,89 cm-1 ,serapan 1195, 87 cm-1 menunjukkan vibrasi rentangan N-C-S. Hasil karakterisasi senyawa kompleks logam Mn(II) dengan ligan N-etilisopropilditiokarbamat dapat dijadikan sebagai zat aditif pada pelumas yang lebih efektif pada suhu 100 oC daripada suhu 40 oC.

Synthesis and Characterization of Nickel Nanoparticles: Biological and Photocatalytic Properties Fadliah, Fadliah; Raya, Indah; Ahmad, Ahyar; Taba, Paulina; Burhanuddinnur, Muhammad; Gaffar, Maming; Putri, Tri Widayati; Nur, Arfiani; Abubakar, Andi Nur Fitriani; Munadi, Rachmin; Majid, Ahmad Fudhail; Pratama, Irham; Yasser, M.; Jarre, Sulistiani; Karim, Harningsih
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.90034

The potential uses of ecologically benign nickel nanoparticle manufacturing in various sectors, such as biomedicine, energy storage, and catalysis, have garnered much interest. This paper covers green approaches to nickel nanoparticle manufacturing, which integrate natural substances as stabilizing and reducing agents with eco-friendly processes. Phytochemicals derived from bacteria, microorganisms, and plant leaf extracts can convert nickel ions (Ni2+) into nickel nanoparticles. Room temperature is used for the synthesis procedure, and neither dangerous compounds nor unusual reaction conditions are used. Using a variety of analytical methods, the resultant nickel nanoparticles were characterized. We also investigate the possibility of using the generated nickel nanoparticles as a cytotoxic, photocatalytic, antioxidant, and antibacterial agents. The antimicrobial activity of nickel nanoparticles demonstrates their potent antibacterial properties, while their antioxidant activity demonstrates their capacity to combat free radicals effectively. Furthermore, nickel nanoparticles' cytotoxic activity demonstrates their capacity to kill cancer cells, and their photocatalytic activity demonstrates their efficiency in breaking down organic contaminants. This review highlights the value of ecologically benign synthetic methods and creates new avenues for developing nickel nanoparticle applications in health and the environment.

SUSTAINABLE NICKEL RECOVERY FROM NICKEL SLAG WASTE USING DIETHYLAMINE DITHIOCARBAMATE: ENHANCING RESOURCE EFFICIENCY AND MINIMIZING ENVIRONMENTAL IMPACT Fadliah, Fadliah; Burhannudinnur, Muhammad; Taba, Paulina; Wahid Wahab, Abdul; Kasim, Syahruddin; Karim, Abdul; Hasri, Hasri; Subandrio; Widayati Putri, Tri; Nur, Arfiani; Yasmaniar, Ghanima; Husla, Ridha; Jarre, Sulistiani; Zahra, Audrey; Abdalrazaq, Eid; Kollur, Shivaa Prasad; Raya, Indah
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 1, APRIL 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i1.22589

Slag waste from the metal refining industry, if left to accumulate for a long time, can become a source of environmental pollution due to the content of heavy metals that can dissolve and spread to the surrounding environment. However, slag can also be an alternative source for obtaining valuable metals. Aim: This study aims to examine the ability of diethylaminedithiocarbamate ligands to recover nickel metal from slag waste through the mechanism of complex compound formation. Methodology and results: The extraction process was carried out at the optimal pH for each ligand to maximize the selectivity and efficiency of metal recovery. Characterization of the complex compounds from the reaction was carried out using various analytical techniques, including Fourier Transform Infrared Spectroscopy (FTIR), UV-visible spectroscopy (UV-Vis), X-Ray Diffraction (XRD), Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS), and melting point tests to determine the thermal stability of the compound. The study results indicate that diethylaminedithiocarbamate ligands can selectively form complex compounds with nickel metal in slag and are effective in recovering metals from slag waste with a recovery value of 94.88%. Conclusion, significance, and impact study: The results of this study indicate that using diethylaminedithiocarbamate ligands can be an environmentally friendly approach to using slag waste as a secondary source of metals.

Pengaruh Metode Sintesis Silika Mesopori SBA-15 terhadap Analisis Differential Scanning Calorimetry dan Pengukuran Low Angles X-Ray Diffraction Ridhawati, Ridhawati; Wahab, Abdul Wahid; La Nafie, Nursiah; Raya, Indah
INTEK: Jurnal Penelitian Vol 5 No 1 (2018): April 2018
Publisher : Politeknik Negeri Ujung Pandang

Mesoporous silica SBA-15 is an interesting material having highly ordered nanopores and large surface area, which is synthesized by sol gel and hydrothermal methods. In this study, mesoporous silica SBA-15 was synthesised with two different methods and the characteris was using X-Ray Diffraction (XRD) and Differential Scanning Calorimetry (DSC). SBA-15 was prepared TEOS as precursor and Pluronic 123 as surfactant. Thermoporous mesoporous DSC thermogram results of the SBA-15A mesoporous silica is (Tg 79oC and Tc 158oC). This is relatively lower than SBA-15B (Tg 86oC and Tc 158oC). The measurement of low angle X-Ray Diffraction SBA-15A has a crystal size 9.46 nm and SBA-15B has a crystal size 9.96 nm. The synthesis of SBA-15 using the hydrothermal method needs to be studied further to obtain thermal characteristics and a more stable crystal structure

Synthesis and Characterization of TiO2 Nanoparticle as Adsorbent on The Treatment of Methylene Blue Dye Pollutant Thahir, Ridhawati; Wahab, Abdul Wahid; Nafie, Nursiah La; Raya, Indah
Jurnal Rekayasa Kimia & Lingkungan Vol 14, No 1 (2019): Jurnal Rekayasa Kimia & Lingkungan (June, 2019)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v14i1.13447

The dye of methylene blue (MB) is organics pollutant from chemical industries. The parameter of MB content are available as methylene blue active substance (MBAS) do not exceed 200 g/L. The treatment of MB dye pollutant can be done by adsorption process with TiO2 nanoparticle. This aim of this research was synthesized of TiO2 nanoparticle using PVA as surfactant and titanium tetraisoproxide (TTIP) as titanium source through sol-gel preparation to hydrothermal process at temperature 400 and 600oC. The result of XRD spectrum was shown the tetragonal crystal, the phase of anatase, and the size of particle was 1.66 to 3.15 nm. Infrared spectroscopy of Ti-O functional group was at 467 cm-1 and there were hydroxyl groups of the surface TiO2. DSC analysis was indicated the thermal stability of TiO2 at 250oC. Application of TiO2 nanoparticle as an adsorbent to photodegradation of MB with Hg lamp 150 watt during 60 minutes. The highest of adsorption capacity at the sample TiO2-600 was 217 mg/g and effectiveness adsorption was 81%. Isoterm adsorption process of MB by TiO2 nanoparticle can be obtained with Langmuir and Freundlish equation, with the determined coefficient value were close to 1. These results suggest of TiO2 nanoparticle was indicated highly potential to apply for the treatment of pollutant industries.

Co-Authors Abd. Karim Abdalrazaq, Eid Abdul Karim Abdul Wahid Wahab Abubakar, Andi Nur Fitriani Ahmad Fudhail Majid Ahmad, Mardiana Ahyar Ahmad Andi Nilawati Usman Arfiani Nur As’ad, Suryani Augustyn, Gelora Helena Burhanuddinnur, Muhammad Dian Ranggina Djabal Nur Basir Eka Anggriani Odja Fadliah, Fadliah Gani Rachim, St. Annisa Gemini Alam Ghanima Yasmaniar Harningsih Karim Hasri Hasri Husla, Ridha Junianti, Fitri Kollur, Shivaa Prasad Lopulalan, Cynthia Maming Maming Gaffar, Maming Maming Maming Mubayyina, Firdaus Muhammad Burhannudinnur Muhammad Zakir Munadi, Rachmin Nurillah, Isti Nursiah La Nafie Nursiah La Nafie Paulina Taba Putri, Tri Widayati Ridhawati, Ridhawati Ridwan, Irham Pratama Subandrio Sulistiani Jarre Syahruddin Kasim Thahir, Ridhawati Wahid Wahab, Abdul Widayati Putri, Tri Yasser, M Zahra, Audrey

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