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All Journal The Journal of Pure and Applied Chemistry Research Konversi Jurnal Kimia Riset Communications in Science and Technology Chemistry Indonesian Journal of Chemical Research CHEESA: Chemical Engineering Research Articles Jurnal Sains Materi Indonesia
Iqbal, Rendy Muhamad
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology

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Chemical and physical activation of natural pyrite as potential inorganic pigment material Iqbal, Rendy Muhamad; Simarmata, Sari Namarito; Sinaga, Tiara Cristy; Simanjutak, Elfrida Roulina; Putra, Riandy; Khaerudini, Deni Shidqi
Konversi Vol 13, No 1 (2024): April 2024
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v13i1.16947

Abstract

Pyrite is one of the minerals in Borneo Island. It has a disadvantage for soil quality due to its acidity properties. One of the main components of pyrite is iron, which promises to be utilized as an inorganic pigment. This research aims to transform pyrite into red-brown pigment material-based iron oxide. Pyrite mineral transformation through chemical and physical activation, followed by pigment characterization using XRF, XRD, FTIR, and FE-SEM. Based on the XRF result, the highest component is Fe, with a percentage up to 42%. This data is also suitable with an iron oxide phase from the diffractogram of pigment, followed by silica and alumina structure. The heating process successfully changed the color materials from gold to red-brown. Then, the molecular vibration of Fe–O also appears on FTIR spectra at a wavenumber of 483 cm-1 and T–O–T bending at 994 cm-1. Moreover, morphological observation exhibits the aggregation of particles and distribution of iron element spread on the overall area pigment. The color transformation into red-brown pigment can be obtained by pyrite processing into potential inorganic pigment material.
The Ecofriendly Biosorbent of Methylene Blue Using Banana Peels Waste Susanti, Indri; Iqbal, Rendy Muhamad; Sholeha, Novia Amalia; Putri, Khusnul Fatimah
Indonesian Journal of Chemical Research Vol 10 No 2 (2022): Edition for September 2022
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.2022.10-ind

Abstract

This research aimed to synthesize and characterize the properties of green banana peel waste to be used as adsorbent material. The green banana peel waste was prepared by sieved to be banana powder and then characterized by XRD, FTIR, XRF, and TGA. The adsorption capacity of methylene blue was tested using a simple method, the “batch method”, with further analysis by spectrophotometry UV-Vis. The XRF results of green banana peel showed that most of the composition is potassium and phosphorus. The methylene blue adsorption capacity of banana peel material is up to 75.10% with 0.5 grams of adsorbent, which is more significant than in the banana peel, which is 68.04% with 0.2 grams.
SURFACE MODIFICATION OF FLY ASH FROM ASAM-ASAM COAL POWER PLANT USING STEARIC ACID AS HYDROPHOBIC INORGANIC MATERIAL Manurung, Tety Wahyuningsih; Beladona, Siti Unvaresi Misonia; Hakim, Muh. Supwatul; Tesalonika, Lidya; Al-Hadi, Risfa Aliya; Iqbal, Rendy Muhamad
Jurnal Kimia Riset Vol. 9 No. 1 (2024): June
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v9i1.57370

Abstract

Abundant coal reserves make this material a substitute fuel choice, especially for industry. The use of coal carries a high risk due to incomplete combustion and produces fly ash products. Fly ash cause pollution and health risks as well as environmental contamination when they are released, deposited, or leached into the ecosystem over short or long periods of time. The high content of silica and alumina in fly ash can be utilized and modified into new materials with added value. This research aims to modify the surface of fly ash using stearic acid as a hydrophobic inorganic material. Fly ash from Asam-asam Coal Power Plant was characterized by using XRD and modified by immersing in stearic acid (2,4,6, and 8%) and 98% ethanol. The result showed that the contact angle increases when fly ash is modified on the surface using stearic acid. The contact angle increases with increasing stearic acid concentration. The highest contact angle was obtained at a stearic acid concentration of 8%, and the lowest at 2% was about 112.9 and 102.2, respectively. The fly ash composition was primarily silica and alumina, which were crystalline, as confirmed by XRD. These findings provide several aspects of fly ash and its potential as a candidate material for environmental remediation and waste management.
Fabrication and characterization of fly ash-based geopolymer and its performance for immobilization of heavy metal cations Iqbal, Rendy Muhamad; Supriadi, Warih; Burhan, R.Y. Perry; Nurherdiana, Silvana Dwi; Hidayati, Ririn Eva; Subaer, Subaer; Bayuaji, Ridho; Fansuri, Hamzah
Communications in Science and Technology Vol 7 No 2 (2022)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.7.2.2022.868

Abstract

In this study, the geopolymer from fly ash as based-raw material has been examined on the ability of several heavy metal ions immobilization. The fly ash has been provided from PT IPMOMI which firstly analyzed the physical and chemical properties. Fly ash and heavy metals were mixed with an activator base until homogeneous, then cast into a cylindrical shape mold following ASTM C 39-86 and left for 7 days. After that, the geopolymer was characterized by SEM, FTIR, XRD, compressive strength test and TCLP. The diffractogram of PT. IPMOMI fly ash exhibited the existence of mullite, alumina and iron oxide phase, which were suitable with XRF result. From FTIR spectra, the vibration on finger print area appeared indicating the vibration of T-O-T from geopolymer network. The observation revealed that the addition of Pb2+ cations caused microcracking from SEM image and affected the compressive strength of the geopolymer. Sr2+ was an ion that was very easilyleached compared to other three ions, and it caused a weak interaction between Sr2+ and geopolymer network. The higher amount of metal ions into the geopolymer network reduced the compressive strength of geopolymer. Sr2+-geopolymer had a lower compressive strength compared to Pb2+, Cd2+, and Co2+.
Photocatalytic Activity and Kinetic Study of Methylene Blue Degradation using N-Doped TiO2 with Zeolite-NaY Susanti, Indri; Iqbal, Rendy Muhamad; Rachman, Rahadian Abdul; Pradana, Tri Agusta
CHEESA: Chemical Engineering Research Articles Vol. 4 No. 2 (2021)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v4i2.7646.75-81

Abstract

Methylene blue is the most widely used dye in the industry and it is difficult to be degraded by the microorganism. This research aims to investigate the photocatalytic activity and effects of contact time on the photocatalytic degradation rate of methylene blue by TiO2/Zeolite-NaY and TiO2-N/Zeolite-NaY material based on the kinetic study. The Advanced Oxidative Process (AOP) method was used to degrade methylene blue. Furthermore, the AOP is a degradation process that uses semiconductor material such as TiO2 or modification catalyst of TiO2 to be TiO2/Zeolite-NaY and TiO2-N/Zeolite-NaY. The degradation of methylene blue with catalyst TiO2/Zeolite-NaY and TiO2-N/Zeolite-NaY were tested under UV light for 5, 20, 30, 40, and 50 minutes. The result showed that TiO2/Zeolite-NaY and TiO2-N/Zeolite-NaY had an excellent activity for degrading the dye, which reached up to 99% after 20 and 30 minutes reaction, respectively. Also, a kinetic study of methylene blue degradation on TiO2/Zeolite-NaY and TiO2-N/Zeolite-NaY showed the kinetic models were according to pseudo-second-order.
Potential of Easily Prepared Low-Cost Natural Clay for the Cationic Adsorption of Methylene Blue Dye Susanti, Indri; Rosdiana, Silvi Rosiva; Sajidah, Happy Bunga Nasyirahul; Sholeha, Novia Amalia; Iqbal, Rendy Muhamad
The Journal of Pure and Applied Chemistry Research Vol. 13 No. 3 (2024): Edition September-December 2024
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2024.013.03.7900

Abstract

The research aims to synthesize and characterized the properties of Natural Clay as adsorbent of cationic methylene blue which was easly prepared low-cost to be natural clay powder. Prepared natural clay then characterized by XRD, FTIR, and XRF. The methylene blue adsorption was tested using batch method with further analysis by spectrophotometry UV-Vis. The adsorption data then be analyze kinetic perform. The result showed that methylene blue adsorption capacity of natural clay is up to 72.51% While the kinetic study of methylene blue adsorption using natural clay showed that methylene blue adsorption process was suitable with kinetic model of Pseudo Second Order.
Surface Modification of Hematite using Stearic Acid as Hydrophobic Inorganic Pigment Materials Iqbal, Rendy Muhamad; Agnestisia, Retno; Damsyik, Akhmad; Sinaga, Tiara Cristy Agatha; Khaerudini, Deni Shidqi; Wulandari, Ika Octavia; Susanti, Indri; Putra, Riandy; F. Adany
Jurnal Sains Materi Indonesia Vol. 26 No. 2 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.8982

Abstract

The inorganic pigment is a material that determines the color of a paint that can be used as a coating material. Until now, the basic material for red pigment, namely hematite, has been imported to meet domestic needs. This study aims to develop a hematite-based inorganic pigment material from the mill-scale waste of PT Krakatau Steel by modifying the surface to be hydrophobic, making the pigmenting material resistant to acid attack and preventing peeling and corrosion of the material. The surface modification of hematite is carried out by reacting it with stearic acid into ethanol as a solvent. Hematite was immersed in a stearic acid solution with various concentrations of 2, 4, 6, and 8% for 6 hours; it was then separated by filtration and followed by the drying process. The hematite-stearic was characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR), scanning electron microscope (SEM), and water contact angle (WCA). The results show that the grafting process successfully changed the properties of hematite to hydrophobic. It is also supported by the FTIR spectrum due to the presence of molecular vibration of C-H, C=O, C-O, and Fe-O. Then, the higher contact angle is 150.474° for the stearic acid concentration of 6%.
Co-Authors Al-Hadi, Risfa Aliya Damsyik, Akhmad Deni Shidqi Khaerudini F. Adany Hakim, Muh. Supwatul Hamzah Fansuri Happy Bunga Nasyirahul Sajidah Hidayati, Ririn Eva Indri Susanti Pradana, Tri Agusta Putri, Khusnul Fatimah R.Y. Perry Burhan, R.Y. Perry Rachman, Rahadian Abdul Retno Agnestisia Riandy Putra Ridho Bayuaji ROSIVA ROSDIANA, SILVI Sholeha, Novia Amalia Silvana Dwi Nurherdiana Simanjutak, Elfrida Roulina Simarmata, Sari Namarito Sinaga, Tiara Cristy Sinaga, Tiara Cristy Agatha Siti Unvaresi Misonia Beladona Subaer - Supriadi, Warih Tesalonika, Lidya Tety Wahyuningsih Manurung Wulandari, Ika Octavia