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All Journal SAINSMAT Venn: Journal of Sustainable Innovation on Education, Mathematics and Natural Sciences SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam
Abd Rahman
King Fahd University of Petroleum & Minerals
Education Environmental Science Mathematics Physics Other

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Microstructure Investigations of Natural Clay From Pattallassang District, Takalar Regency, South Sulawesi Province, Indonesia Abd Rahman; Suriati Eka Putri; Diana Eka Pratiwi; Satria Putra Jaya
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 12, No 1 (2023): Maret
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/sainsmat121444522023

Abstract

The study aimed to investigate the microstructure of natural clay from Pattallassang District, Takalar Regency, South Sulawesi Province. The clay was characterized using X-ray diffractometer (XRD), surface area analyzer (SAA), and scanning electron microscope (SEM). The XRD analysis showed that the main mineral composition of the clay was kaolinite, quartz, hematite, geothite, magnetite, and anatase phases. The SAA using BET analysis shows the large surface area of 59.26 m2/g and BJH analysis for pore distribution of 32.77 nm. SEM observations revealed that the clay consists of plate-like kaolinite particles arranged randomly. The results indicate that the natural clay from Pattallassang District has good potential for use in various industrial applications due to its high kaolinite content and favorable microstructure.Keywords: kaolinite, microstructure, mineral, clay.
The Effect of Inorganic Acid Activation on the Metal Oxide Content of Natural Montmorillonite from Gowa Regency Suriati Eka Putri; Sumiati Side; Nita Magfirah Ilyas; Diana Eka Pratiwi; Abd Rahman
Venn: Journal of Sustainable Innovation on Education, Mathematics and Natural Sciences Vol. 5 No. 4 (2026): MIPA dan dan Pendidikan lingkup MIPA
Publisher : Pusat Studi Bahasa dan Publikasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53696/venn.v5i4.477

Abstract

Natural montmorillonite has attracted considerable attention due to its high cation exchange capacity, layered structure, and potential applications as adsorbents and catalyst supports. However, it generally contains impurity oxides that affect its physicochemical properties. This study aimed to investigate the effect of inorganic acid activation on the metal oxide content and crystalline characteristics of natural montmorillonite obtained from Gowa Regency, South Sulawesi, Indonesia. The montmorillonite samples were activated using 2 M HCl and 2 M H₂SO₄ through acid leaching treatment. The metal oxide composition and crystalline phases were characterized using X-ray fluorescence (XRF) and X-ray diffraction (XRD), respectively. The XRF results revealed that Fe₂O₃ was the dominant impurity oxide in natural montmorillonite with a concentration of 31.61%. After acid activation, the Fe₂O₃ content decreased significantly to 21.78% for HCl-treated MMT and 18.83% for H₂SO₄-treated MMT, indicating effective removal of iron oxide impurities. In contrast, the SiO₂ content increased from 39.51% to 40.13% and 41.02% after HCl and H₂SO₄ activation, respectively. XRD analysis confirmed the presence of quartz silica, alumina, and hematite phases, with diffraction peaks at 2θ ≈ 26.6°, 34.2°, and 50.1°, respectively. Acid activation also reduced the average crystallite size from 41.2 nm in natural MMT to 35.1 nm and 29.9 nm after HCl and H₂SO₄ treatment, respectively. The results demonstrate that inorganic acid activation effectively modified the oxide composition and crystalline structure of natural montmorillonite, particularly through the removal of hematite impurities and enhancement of silica-rich phases. Therefore, acid-activated montmorillonite shows promising potential for adsorption and catalytic applications.
Microstructure Investigations of Natural Clay From Pattallassang District, Takalar Regency, South Sulawesi Province, Indonesia Abd Rahman; Suriati Eka Putri; Diana Eka Pratiwi; Satria Putra Jaya
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 1 (2023): Volume 12 Nomor 1 (Maret 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The study aimed to investigate the microstructure of natural clay from Pattallassang District, Takalar Regency, South Sulawesi Province. The clay was characterized using X-ray diffractometer (XRD), surface area analyzer (SAA), and scanning electron microscope (SEM). The XRD analysis showed that the main mineral composition of the clay was kaolinite, quartz, hematite, geothite, magnetite, and anatase phases. The SAA using BET analysis shows the large surface area of 59.26 m2/g and BJH analysis for pore distribution of 32.77 nm. SEM observations revealed that the clay consists of plate-like kaolinite particles arranged randomly. The results indicate that the natural clay from Pattallassang District has good potential for use in various industrial applications due to its high kaolinite content and favorable microstructure.
The Effect of Acid Treatment on The Characteristics of Modernite Zeolite Sumiati Side; Suriati Eka Putri; Diana Eka Pratiwi; Aulia Rahma; Abd Rahman
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This work investigated the use of acid treatment on the characteristics of zeolite mineral. The effects of treating zeolite with various acid solutions hydrochloric acid (HCl) and sulfuric acid (H2SO4) were measured using x-ray fluorescence (XRF), x-ray diffraction (XRD), and scanning electron microscope (SEM). The results showed an increase in the percentage of SiO2 and Al2O3 after zeolite activation, and also a decrease in the amount of impurities. The crystalline phase of the zeolite was carried out using XRD analysis, indicating the type of zeolite used is modernite. The SiO2 phase in the sample is quartz, and the Al2O3 phase is corundum. The average crystal size decreased after activation, from 14.23 nm to 6.85 nm for HCl and 5.42 nm for H2SO4. Furthermore, the surface morphology of all zeolite samples has a form of irregular spherical surface, and the surface size of the particles after activation shows a smaller particle shape. The results of this study are expected to become recommendations for further research related to natural zeolite pretreatment as a catalyst support.
Co-Authors Aulia Rahma Diana Eka Pratiwi Nita Magfirah Ilyas Satria Putra Jaya Satria Putra Jaya Sumiati Side Suriati Eka Putri Suriati Eka Putri