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All Journal Jurnal Bahan Alam Terbarukan PROSIDING SEMINAR KIMIA JURNAL ATOMIK
Hiyahara, Irfan Ashari
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology

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Journal : PROSIDING SEMINAR KIMIA

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REVIEW ARTICLE: UTILIZATION OF VARIOUS OF ADSORBENT FROM ACTIVATED CHARCOAL IN INCREASING THE QUALITY OF COOKING OIL Hasriani, Hasriani; Sitorus, Saibun; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Cooking oil is a type of vegetable oil derived from palm plants that has gone through various refining processes. Generally, cooking oil is used repeatedly at high temperatures until the oil is unfit for consumption This results in a decrease in the quality and nutritional value of fried food. In addition, the accumulation of used cooking oil (used cooking oil) can cause environmental pollution. Improving the quality and nutritional value of cooking oil can be done by using the adsorption method. The adsorption method is a method that is carried out by using a number of adsorbents from activated charcoal in the process of refining used cooking oil. Adsorbents from activated charcoal can be made from basic ingredients of agricultural waste such as activated charcoal from coconut shells, corn cobs, snack fruit and others. The adsorbent of activated charcoal can reduce the levels of fatty acids, water content, peroxide levels and acid numbers. The internal adsorption capacity depends on the different adsorbent types, contact time, amount of adsorbent, surface area and structure of the adsorbent and adsorbate concentration. Keywords: Adsorbent, Activated Charcoal, Adsorption Capacity, Used Cooking Oil
MINI REVIEW: FOTOKATALISIS NANOPARTIKEL CaO TERHADAP ZAT WARNA ORGANIK SINTETIK Salsabila, Aidilia Putri; Hiyahara, Irfan Ashari; Syaima, Husna
PROSIDING SEMINAR KIMIA Vol 2 No 2 (2024): Prosiding SNKT III 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Nanoparticles of CaO (CaO-NP) are currently a frequently used material in research due to their excellent catalytic and antibacterial activities, low toxicity, abundant availability, and relatively affordable manufacturing cost. One of their applications is as a photocatalyst, commonly employed to degrade organic materials such as dyes. This review discusses the utilization of CaO nanoparticles as photocatalysts for both cationic and anionic organic dyes. Literature results indicate that CaO-NP can serve as a catalyst in the photocatalysis of dyes, whether they are cationic or anionic. The percentage of degradation achieved varies, ranging from as low as 60% to as high as 99.21%. These varying results are attributed to the different parameters used in the diverse photocatalysis processes. Keywords: CaO Nanoparticle, Organic Dye, Photocatalysis
SYNTHESIS OF SILVER NANOPARTICLES USING BIOREDUCTORS: MINI REVIEW Indriani, Isah Waliah; Hindryawati, Noor; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Synthesis of silver nanoparticles can be carried out using bioreductors which are natural reducing agents from natural materials containing antioxidant compounds or polyols which can reduce silver due to the nucleophilic nature of phenolic compounds in plant secondary metabolites. The use of bioreductors in the manufacture of nanoparticles can reduce the adverse effects and hazardous waste generated due to reduced adsorption of the toxic properties of the solvent used. The content of organic compounds in bioreductors can be utilized, for example secondary metabolites such as terpenoids, flavonoids and tannins which act as antioxidants and capping agents, where Ag+ ions in AgNO3 can be reduced into silver nanoparticles, so bioreductors can replace the role of synthetic reducing agents. Based on the literature used, several plants whose extracts can be used as bioreductors, namely gambier, gotu kola leaves, water hyacinth leaves, bilimbi leaves, cempedak bark and bay leaves using variations in the concentration and composition of the AgNO3 solution. The results of silver nanoparticles were synthesized using bioreductors, namely various nano-sized particles and based on UV-Vis spectrophotometry data, silver nanoparticles appeared at wavelengths between 410 - 450 nm. Keywords: Secondary metabolites, Bioreductors, Silver Nanoparticles
MINI REVIEW: SINTESIS DAN KARAKTERISASI NANOPARTIKEL CaO DARI CANGKANG TELUR MENGGUNAKAN METODE KALSINASI Zahra, Marinda Afifatu; Hiyahara, Irfan Ashari; Syaima, Husna
PROSIDING SEMINAR KIMIA Vol 2 No 2 (2024): Prosiding SNKT III 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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This review article aims to collect, compare and analyze the latest research on the synthesis and characterization of CaO nanoparticles from eggshells. CaO is a material in the form of white crystalline solids made from thermal decomposition of limestone or shells, which contains CaCO3 which has the potential to become CaO nanoparticles to be applied in various fields. Currently, various methods have been carried out to synthesize these materials, such as precipitation methods, hydrothermal methods, sol-gel methods, and so on. One of them is the calcination method. The calcination method itself is a commonly used thermal processing method involving heating at high temperatures. The advantages of the calcination method are that it is efficient, has a high level of purity, is economical and relatively simple and others. However, the calcination method itself has disadvantages, namely the process time is quite long, must be careful and can have a negative impact on the environment. In this review, we will discuss the synthesis of CaO nanoparticles characterized using X-Ray Diffraction (XRD), Fourier Transform InfraRed (FTIR), Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM). The literature results show that in XRD the main peak 2θ positions are 111 and 200 and the crystal size is 10-55 nm, in FTIR the functional groups that appear are the Ca-O stretch group and C-O stretch vibrations, in SEM and TEM the shape of the crystal. Keywords: Synthesis, CaO nanoparticles, Calcination
ANALISIS NILAI TOTAL SULFUR (TS) DAN CALORIFIC VALUE (CV) DALAM BATUBARA MENGGUNAKAN METODE AMRERICAN STANDARD TESTING AND MATERIAL (ASTM) DI PT GEOSERVICES SAMARINDA KALIMANTAN TIMUR Novianti, Rina Lia; Sitorus, Saibun; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Coal is a crucial energy source with varying quality levels. It is formed by the accumulation of organic sediments mixed with carbon, resulting from the diagenesis process of plant elements. This study aims to determine the Total Sulfur (TS) and Calorific Value (CV) of coal, which are essential factors in assessing coal quality and economic value. The American Standard Testing and Material (ASTM) method is employed to ensure consistency and standardization in the analysis. From an analysis of six samples, the total sulfur content was determined to be 1.98% for sample A, 1.88% for sample B, 2.06% for sample C, 0.14% for sample D, 0.70% for sample E and 0.18% for sample F. Additionally, the calorific value were determined to be 6267 Cal/g for sample A, 6126 Cal/g for sample B, 6234 Cal/g for sample C, 5189 Cal/g for sample D, 4986 Cal/g for sample E and 3917 Cal/g for sample F. Based on the total sulphur analysis sample D, sample E and sample F can be used in the cement burning process because their total sulphur content is less than 0.8%. Meanwhile, based on the calorific value analysis sample A, sample B and sample C can be used the cement burning process because their calorific value above 6000 Cal/g. Keywords : Coal, total sulphur, calorific value, American Standard Testing and Material.
MINI REVIEW: SINTESIS DAN KARAKTERISASI NANOPARTIKEL ZnO DENGAN METODE PRESIPITASI Bergita, Angela; Hindryawati, Noor; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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ZnO nanoparticles are materials composed of particles ranging in size from 1 to 100 nm and can be produced through the precipitation method. This method is highly popular due to its cost-effectiveness. Numerous studies on the synthesis of ZnO nanoparticles using the precipitation method have been conducted. This mini-review aims to explore the characteristics of nanoparticles synthesized using the precipitation method. The approach employed in this journal involves a literature review of several journals focusing on the synthesis of ZnO nanoparticles through precipitation. The synthesis results in ZnO nanoparticles with sizes ranging from 4.38 nm to 1400 nm, possessing a hexagonal wurtzite crystal structure and bandgaps ranging from 3.57 to 3.7943 eV. Based on the conducted review, it can be concluded that the material that yields small-sized nanoparticles with high purity includes the precursor ZnSO4(H2O)7, deionized water as the solvent, and NH4OH as the catalyst. Keywords: Nanoparticles, Precipitation, Zinc Oxide
Pemanfaatan Smartphone Based Colorimetry Dalam Pengukuran Degradasi Metilen Biru Dengan Fotokatalitik CaO Rahman, Kamaulana Adi; Alimuddin, Alimuddin; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Water pollution caused by textile industry waste, especially methylene blue, is a problem for the environment that needs to be addressed. Photocatalysis using calcium oxide (CaO) is one of the effective and environmentally friendly methods in degrading methylene blue. This study aims to determine the effect of CaO catalyst mass and pH on the rate of methylene blue degradation using smartphone-based colorimetry. This study was conducted by varying the mass of CaO 12.5 mg, 25 mg, 37.5 mg and 50 mg and pH variations of 7, 8, 9, and 10 in a 10 mg/L methylene blue solution. Degradation was carried out with visible light from a 100 W incandescent lamp. The concentration of methylene blue was measured using smartphone-based colorimetry. The results showed that contact time and CaO mass had a significant effect on the rate of methylene blue degradation. The optimum mass of photocatalysis was 50 mg and the optimum pH was 7. Keywords : Methylene Blue, CaO, Photocatalysis, Smartphone-based colorimetry
MINI REVIEW: SINTESIS DAN KARAKTERISASI NANOPARTIKEL ALUMINIUM OKSIDA (Al2O3) DENGAN METODE PRESIPITASI Sari, Nadia Fellinda Wanda; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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This review article aims to compare and analyze the latest research on the synthesis and characterization of aluminum oxide nanoparticles from inorganic waste. Aluminum Oxide (Alumina, Al2O3) is a compound formed from aluminum and oxygen. The nature of Al2O3 is resistant to corrosion. Based on a literature review, the synthesis of aluminum oxide nanoparticles can be synthesized by precipitation methods, sol-gel methods, electrolysis methods, green synthesis methods, sonochemical methods and others. The precipitation method is a method used to produce a powder that has advantages including homogeneous mixing that occurs from a reactant precipitate reduces the reaction temperature and the process of this method to synthesize metal oxide powder is very simple. This method has several disadvantages such as not being able to run well when using reactants that have different solubilities, this process is not appropriate for the manufacture of materials with a high level of purity, in addition this method does not have common synthesis conditions in the formation of several metal oxides. In this review, we will discuss the synthesis of Al2O3 nanoparticles characterization results using X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM). Therefore, this mini review reviews the development of Al2O3 characterization synthesis with precipitation method. Keywords : Synthesis, Al2O3, nanoparticles, Precipitation
MINI REVIEW: ADSORPSI NANOPARTIKEL ALUMINIUM OKSIDA (Al2O3) TERHADAP ZAT WARNA ORGANIK SINTETIK Sapira, Putri Abelia; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Aluminum oxide (Al2O3) nanoparticles are a strong and versatile material with good mechanical strength, large specific surface area, and high adsorption capacity, making it very favorable for adsorption processes. In addition, aluminum oxide is non-toxic, easy to use, and has good chemical stability. The presence of many hydroxide groups on Al2O3 nanoparticles increases their ability as adsorbents. Therefore, aluminum oxide has attracted widespread attention in the removal of pollutants from the environment, such as heavy metals, pigments, dissolved organic materials, antibiotics, and dyes. This mini review examines the latest developments regarding the use of Al2O3 nanoparticles as adsorbents for synthetic organic dyes, both cationic and anionic, such as Methylene Blue, Orange G, Acid Orange 7, and Eriochrom Black T. The discussion focuses on the efficiency and potential applications of Al2O3 nanoparticles in dye adsorption. Keywords: Adsorption, Al2O3 Nanoparticles, Dyes
Co-Authors Ahmad, Atika Aulia Akbar, Muhammad Marion Arief, M. Syaiful Bergita, Angela Daniel Daniel Duratulhikmah, Nur Fadhilah Gaanty Pragas Maniam, Gaanty Pragas Hasriani Hasriani, Hasriani Husna Syaima Indriani, Isah Waliah Larasati, Zarra Udyani Nanang Tri Widodo Noor Hindryawati, Noor Novianti, Rina Lia Nurhidayah, Annisa Putra, Narundana Perdana Rahayuningsih Rahayuningsih, Rahayuningsih Rahman, Kamaulana Adi Saibun Sitorus Salsabila, Aidilia Putri Sapira, Putri Abelia Saputra, Herdian Sari, Nadia Fellinda Wanda Solly Aryza Teguh Wirawan, Teguh Wulandari, Siti Aprilia Zahra, Marinda Afifatu