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Thermal and Infrared Studies of Garnierite from the Soroako Nickeliferous Laterite Deposit, Sulawesi, Indonesia Sufriadin, Sufriadin; Idrus, Arifudin; Pramumijoyo, S.; Warmada, I. W.; Nur, I.; Imai, A.; Imran, A. M.; Kaharuddin, Kaharuddin
Indonesian Journal on Geoscience Vol 7, No 2 (2012)
Publisher : Geological Agency

DOI:Â 10.17014/ijog.v7i2.137Mineralogical characterization of some garnierite samples from Soroako have been conducted using X-ray diffraction, thermal analysis, and infrared spectroscopy methods. XRD patterns reveal the samples mainly containing the mixture of kerolite (talc-like phase) and serpentine with minor smectite, sepiolite, and silica. Thermal analyses of garnierite samples indicated by DTA curves are in good agreement with patterns that have been reported in literature. Three endothermic peaks normally occur in the ranges between 58Âº C and <800Âº C illustrating three steps of weight losses: adsorbed, bound, and hydroxyl/crystal water. One additional weight loss in low temperature region of sepiolite is corresponding to the lost of zeolitic water. Infrared spectra appeared in 3800 - 3200 cm-1 region generally exhibit broad absorption bands, indicating low crystallinities of studied samples and can be assigned to the presence of hydroxyl group bonded to octahedral coordination mainly Mg atom. The bands observed at 1660 cm-1, 1639 cm-1, 1637 cm-1, and 1633 cm-1 in all samples indicate water molecules. FTIR spectra displaying the strong bands at 1045 cm-1, 1038 cm-1, and 1036 cm-1 could be related to the presence of Si-O-Si bonds linking to tetrahedral coordination. The strong absorption bands appeared at 511 cm-1, 505 cm-1, 499 cm-1, and 496 cm-1 in respective samples are attributed to divalent cation bonds (e.g. Mg, Ni-O). Both TG/DTA and FTIR seem to be the powerful tool in diagnosing the crystal chemistry of garnierite which is mainly composed of phyllosilicate minerals.

Thermal and Infrared Studies of Garnierite from the Soroako Nickeliferous Laterite Deposit, Sulawesi, Indonesia Sufriadin, Sufriadin; Idrus, Arifudin; Pramumijoyo, S.; Warmada, I. W.; Nur, I.; Imai, A.; Imran, A. M.; Kaharuddin, Kaharuddin
Indonesian Journal on Geoscience Vol 7, No 2 (2012)
Publisher : Geological Agency

DOI:Â 10.17014/ijog.v7i2.137Mineralogical characterization of some garnierite samples from Soroako have been conducted using X-ray diffraction, thermal analysis, and infrared spectroscopy methods. XRD patterns reveal the samples mainly containing the mixture of kerolite (talc-like phase) and serpentine with minor smectite, sepiolite, and silica. Thermal analyses of garnierite samples indicated by DTA curves are in good agreement with patterns that have been reported in literature. Three endothermic peaks normally occur in the ranges between 58Âº C and <800Âº C illustrating three steps of weight losses: adsorbed, bound, and hydroxyl/crystal water. One additional weight loss in low temperature region of sepiolite is corresponding to the lost of zeolitic water. Infrared spectra appeared in 3800 - 3200 cm-1 region generally exhibit broad absorption bands, indicating low crystallinities of studied samples and can be assigned to the presence of hydroxyl group bonded to octahedral coordination mainly Mg atom. The bands observed at 1660 cm-1, 1639 cm-1, 1637 cm-1, and 1633 cm-1 in all samples indicate water molecules. FTIR spectra displaying the strong bands at 1045 cm-1, 1038 cm-1, and 1036 cm-1 could be related to the presence of Si-O-Si bonds linking to tetrahedral coordination. The strong absorption bands appeared at 511 cm-1, 505 cm-1, 499 cm-1, and 496 cm-1 in respective samples are attributed to divalent cation bonds (e.g. Mg, Ni-O). Both TG/DTA and FTIR seem to be the powerful tool in diagnosing the crystal chemistry of garnierite which is mainly composed of phyllosilicate minerals.

Thermal and Infrared Studies of Garnierite from the Soroako Nickeliferous Laterite Deposit, Sulawesi, Indonesia Sufriadin, Sufriadin; Idrus, Arifudin; Pramumijoyo, S.; Warmada, I. W.; Nur, I.; Imai, A.; Imran, A. M.; Kaharuddin, Kaharuddin
Indonesian Journal on Geoscience Vol 7, No 2 (2012)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.7.2.77-85

DOI:Â 10.17014/ijog.v7i2.137Mineralogical characterization of some garnierite samples from Soroako have been conducted using X-ray diffraction, thermal analysis, and infrared spectroscopy methods. XRD patterns reveal the samples mainly containing the mixture of kerolite (talc-like phase) and serpentine with minor smectite, sepiolite, and silica. Thermal analyses of garnierite samples indicated by DTA curves are in good agreement with patterns that have been reported in literature. Three endothermic peaks normally occur in the ranges between 58Âº C and <800Âº C illustrating three steps of weight losses: adsorbed, bound, and hydroxyl/crystal water. One additional weight loss in low temperature region of sepiolite is corresponding to the lost of zeolitic water. Infrared spectra appeared in 3800 - 3200 cm-1 region generally exhibit broad absorption bands, indicating low crystallinities of studied samples and can be assigned to the presence of hydroxyl group bonded to octahedral coordination mainly Mg atom. The bands observed at 1660 cm-1, 1639 cm-1, 1637 cm-1, and 1633 cm-1 in all samples indicate water molecules. FTIR spectra displaying the strong bands at 1045 cm-1, 1038 cm-1, and 1036 cm-1 could be related to the presence of Si-O-Si bonds linking to tetrahedral coordination. The strong absorption bands appeared at 511 cm-1, 505 cm-1, 499 cm-1, and 496 cm-1 in respective samples are attributed to divalent cation bonds (e.g. Mg, Ni-O). Both TG/DTA and FTIR seem to be the powerful tool in diagnosing the crystal chemistry of garnierite which is mainly composed of phyllosilicate minerals.

Analisis Petrografi dan Kualitas Batubara Sinjai, Sulawesi Selatan Sufriadin Sufriadin; Sri Widodo; Yulinaus Mendaun
Jurnal Penelitian Enjiniring Vol 20 No 2 (2016)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.743 KB)

The investigation of coal deposits located in Sinjai Regency has been performed with the aim at elucidation of petrographic and quality of coal represented by ash and sulfur total content and its implication for the potential use of this coal. Field observation indicated the coal seams were relatively thin (<2m) and were associated with well-bedded, fine to medium grained tuffs. Petrografic analysis exhibited that vitrinite is dominant maceral group containing in coal followed by inertinite. Liptine is also present in small amount mainly sporinite and resinite. The mineral matter content was dominated by clay minerals and small quantity of pyrite. The Rv-max value of 0.40% indicates sub bituminous coal rank according to ASTM (1981) classification. Ash content of studied coal ranges from 8.8 to 40.2% indicating a medium to high ash coal whereas total sulfur shows the low concentration (<1%) implying the coal is classified as low sulfur. The elevated concentration of vitrinite in the sample studied indicate the suitability use for solid fuel combustion particularly in power plant and cement factory, whereas the low content of liptinite and inertinite are not favorable for liquifaction and coke making respectively.

Thermal and Infrared Studies of Garnierite from the Soroako Nickeliferous Laterite Deposit, Sulawesi, Indonesia Sufriadin Sufriadin; Arifudin Idrus; S. Pramumijoyo; I. W. Warmada; I. Nur; A. Imai; A. M. Imran; Kaharuddin Kaharuddin
Indonesian Journal on Geoscience Vol 7, No 2 (2012)
Publisher : Geological Agency

DOI: 10.17014/ijog.v7i2.137Mineralogical characterization of some garnierite samples from Soroako have been conducted using X-ray diffraction, thermal analysis, and infrared spectroscopy methods. XRD patterns reveal the samples mainly containing the mixture of kerolite (talc-like phase) and serpentine with minor smectite, sepiolite, and silica. Thermal analyses of garnierite samples indicated by DTA curves are in good agreement with patterns that have been reported in literature. Three endothermic peaks normally occur in the ranges between 58º C and <800º C illustrating three steps of weight losses: adsorbed, bound, and hydroxyl/crystal water. One additional weight loss in low temperature region of sepiolite is corresponding to the lost of zeolitic water. Infrared spectra appeared in 3800 - 3200 cm-1 region generally exhibit broad absorption bands, indicating low crystallinities of studied samples and can be assigned to the presence of hydroxyl group bonded to octahedral coordination mainly Mg atom. The bands observed at 1660 cm-1, 1639 cm-1, 1637 cm-1, and 1633 cm-1 in all samples indicate water molecules. FTIR spectra displaying the strong bands at 1045 cm-1, 1038 cm-1, and 1036 cm-1 could be related to the presence of Si-O-Si bonds linking to tetrahedral coordination. The strong absorption bands appeared at 511 cm-1, 505 cm-1, 499 cm-1, and 496 cm-1 in respective samples are attributed to divalent cation bonds (e.g. Mg, Ni-O). Both TG/DTA and FTIR seem to be the powerful tool in diagnosing the crystal chemistry of garnierite which is mainly composed of phyllosilicate minerals.

Geochemical study of ultramafic rocks from Latowu area of North Kolaka, Southeast Sulawesi and its implication for CO2 sequestration S Sufriadin; Sri Widodo; Akane Ito; Tsubasa Otake; Kenzo Sanematsu
Journal of Degraded and Mining Lands Management Vol 5, No 4 (2018)
Publisher : Brawijaya University

Geochemistry of ultramafic rocks in the Latowu Area of North Kolaka Regency, Southeast Sulawesi has been investigated with the aim at deciphering of mineral characteristics, chemical composition and their potential use as carbon dioxide storage. Mineralogy was characterized by both scanning electron microscopy (SEM) and X-ray diffractometry (XRD); whereas bulk rock and mineral chemistry were analyzed by means of X-ray fluorescence spectrometry (XRF) and Electron probe microanalyzer (EPMA) respectively. Results of analyses show that lizardite is predominant serpentine mineral present, followed by chrysotile and trace amount of magnetite. Remnants of olivine and pyroxene were detected in some samples but they have been pseudomorphicly replaced by serpentine. Serpentinization of Latowu ultramafic rocks has led to decrease in grain size and density. Lizardite is characterized by fine grained particles with higher in iron. The higher Mg and Fe of the rocks indicate a suitability as feed materials for carbon dioxide sequestration. Mineral and chemical properties of ultramafic rocks have significant role in evaluating the feasibility of mineral carbonation.

Analisis Mineralogi dan Kimia Dolomit Kabupaten Bone Bolango, Provinsi Gorontalo Sufriadin Sufriadin; Purwanto Purwanto; Muhammad Rahmatul Jihad; Astina Aras; Angelia Santoso; Miftah Hujannah
Jurnal Geomine Vol 9, No 2 (2021): Edisi Agustus 2021
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v9i2.922

Characterization of dolomite samples from Bone Bolango, Gorontalo Province have been performed with the objective to find out their mineralogical and chemical compositions. Observation and mineral analyses were carried out by means of microscopy and X-ray diffraction methods respectively; whereas chemical composition was determined by using X-ray fluorescence spectrometer. Result of XRD analysis shows that samples contain dolomite [CaMg(CO3)2], calcite [CaCO3] and [SiO2]. The proportion of dolomite is about 60.4% in average and its presence is as replacement of calcite in bioclast components and matrices in the rock. Dolomite crystals are characterized by mosaic texture with euhedral – subhedral in shapes. Spacially, dolomite content increase from west to the east of study area. The XRF analysis reveals that dolomite samples contain MgO ranging between 8.07 and 20.78% while CaO ranges between 30.04 and 56.13%. The SiO2 concentration ranges from 3.50 – 7.55%; whereas Al2O3 ranges from 1.07 – 1.84%. The average MgO content of dolomite about 12.89% can be categorized as calcium dolomite. Dolomite within the study area can be used directly in agriculture sector, but it less suitable as raw materials in glass, ceramic and refractory industries because the average content of MgO is less than 17%. However, it can be increased of their MgO with the application of selective mining or beneficiation process.

Analisis Mineralogi dan Kimia Bentonit Daerah Bone Bolango, Provinsi Gorontalo Sufriadin Sufriadin; Purwanto Purwanto; Nanda Pratiwi Rapele; Chairil Sastria; Shany Sofiah Fauth
Jurnal Geomine Vol 8, No 2 (2020): Edisi Agustus 2020
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v8i2.604

Bentonite is one of industrial mineral deposit that has many applications in industries. In order to optimize its utilization, it is needed an initial assessment about the quality in particularly mineralogical and chemical composition. The objective of this study was to analyze mineralogical and chemical properties of bentonite samples from Bone Bolango Area, Gorontalo Province. Mineralogical analysis was performed by means of microscopic and X-ray diffraction (XRD) methods while chemical composition was determined by X-ray fluorescence (XRF) spectrometry. Results of analysis show that bentonite samples were composed of smectite mineral of montmorillonite type with the impurities constitute of plagioclase, quartz, calcite and maghemite. Chemical composition of Bone Bolango bentonite is dominated by SiO2 and Al2O3with the ratio in the range between 1.38 and 1.68. This bentonite was formed by weathering process of volcanic rocks mainly derive from plagioclase alteration. Based on mineral and chemical compositions, Bone Bolango bentonite is categorized as Ca-bentonite with relatively non-swelling property. However it is potentially used as raw materials in ceramic making and as absorbent.

Desulfurisasi Dan Deashing Pada Batubara Menggunakan NaOH Dan HCL Sebagai Leaching Agent Sri Widodo; Sufriadin Sufriadin; Erwin Suhendar
Jurnal Geomine Vol 7, No 1 (2019): Edisi April 2019
Publisher : Universitas Muslim Indonesia

Penelitian mengenai desulfurisasi dan deashing pada batubara, selain untuk meningkatkan kualitas batubara juga merupakan usaha untuk mengurangi unsur-unsur yang menjadi penyebab terjadinya pencemaran lingkungan. Sampel batubara pada penelitian ini berasal dari batubara Desa Tondongkura, Kecamatan Tondong Tallasa, Kabupaten Pangkep, Provinsi Sulawesi Selatan. Desulfurisasi dan deashing batubara Tondongkura pada penelitian ini dilakukan dengan menggunakan NaOH dan HCl sebagai leaching agent. Untuk mengetahui pengaruh dari beberapa faktor dalam proses leaching, maka percobaan dilakukan dalam beberapa variabel, yaitu waktu, suhu, ukuran partikel, konsentrasi larutan NaOH, dan konsentrasi HCl. Hasil percobaan menunjukkan kadar total sulfur awal dari 3,67% turun hingga 2,93%, atau persentase penurunan maksimum total sulfur sebesar 20,03%, sedangkan persentase maksimum penurunan kadar abu sebesar 12,29%, atau dari kadar abu awal 27,44% turun hingga 24,06%. HCl digunakan sebagai leaching agent pada leaching tahap kedua pada batubara yang sebelumnya dileaching menggunakan larutan NaOH pada kondisi optimum. Dari hasil percobaan didapatkan maksimum persentase penurunan total sulfur sebesar 42,51%, yaitu dari total sulfur awal sebesar 3,67% diturunkan hingga 2,11% dan kadar abu sampel pada awalnya sebesar 27,44% diturunkan hingga 22,04%, atau persentase maksimum penurunan kadar abu sebesar 19,67%.

Analisis Mineral Matter dan Kualitas Batubara Blok Batulaki Kecamatan Satui, Kabupaten Tanah Bumbu, Provinsi Kalimantan Selatan Rahmat Sira; Sufriadin Sufriadin; Sri Widodo; Asri Jaya
Jurnal Geomine Vol 9, No 3 (2021): Edisi Desember 2021
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v9i3.960

Sampel batubara dari Blok Batulaki, Kecamatan Satui, Kabupaten Tanah Bumbu, Provinsi Kalimantan Selatan telah diteliti untuk mengetahui komposisi mineral dan kualitasnya. Analisis mineral matter dilakukan dengan menggunakan metode mikroskopis dan difraktometri sinar X ( (XRD), sedangkan untuk analisis kualitas batubara terdiri atas analisis proksimat, analisis total sulfur, dan analisis nilai kalori. Hasil analisis mineral matter memperlihatkan sampel batubara didominasi oleh kaolinit (Kln) yang diikuti oleh pirit (Py), kuarsa (Qz), kalsit (Cal), dan goetit (Gt). Hasil analisis proksimat, total sulfur, dan nilai kalori menunjukkan bahwa kualitas batubara Blok Batulaki termasuk kedalam kelembaban tinggi, kadar abu rendah, zat terbang tinggi, karbon padat menengah dan sulfur rendah. Rata-rata nilai kalori yaitu sebesar 5516,94 kal/gr mengindikasikan bahwa peringkat batubara Blok Batulaki tergolong dalam sub-bituminous coal.

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