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All Journal Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Alchemy : Journal of Chemistry EduChemia: Jurnal Kimia dan Pendidikan Indonesia Chimica Acta Al-Kimia Chimica et Natura Acta Chemistry Indonesian Journal of Chemical Research Walisongo Journal of Chemistry Dharma Bakti JKPK (Jurnal Kimia dan Pendidikan Kimia) ALKIMIA : Jurnal Ilmu Kimia dan Terapan Amina Jurnal Sains dan Teknologi Peternakan
Firnanelty, Firnanelty
Department Of Chemistry, Faculty Of Science And Technology, Universitas Islam Negeri Alauddin Makassar
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Materials Science & Nanotechnology Social Sciences Veterinary Other

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Analysis of the Heavy Metal Levels (Cd, Fe, Hg and Pb) at Losari Beach Tourism Reclamation of Makassar Firnanelty, Firnanelty; Chadijah, Sitti; Adawiah, Syarifah Rabiatul; Firdaus, Firdaus; Nugraha, Muh. Imam Dyan Nugraha Imam Dyan
Indonesian Journal of Chemical Research Vol 10 No 2 (2022): Edition for September 2022
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2022.10-fir

Abstract

The process of stockpiling reclamation areas and disposing of waste streams can pollute the environment and cause the attendance of dangerous heavy metals. In this research was conducted to determine heavy metals Cd, Fe, Hg, and Pb levels in water and sediment on Losari beach. The method used was an atomic absorption spectrophotometer. The result showed that the levels of Cd and Fe in the water for the north point were 0.0278 and 0.0432 mg/L, the south point was 0.0031 and 0.0674 mg/L, the point around the platform showed 0.0028 and 0.0534 mg/L and the levels of sediment were 0.0010 and 31.2417 mg/L. The levels of Hg and Pb in water were 0.0235 and 0.0390 mg/L (north point) 0.0105 and 0.0420 mg/L (south point) 0.0027 and 0.0460 mg/L (around the platform), sediments were 0.0027 and 0.071 mg/L. The result concluded that the concentration of Cd had crossed the threshold only at the north point namely 0.01 mg/L, while the concentration of Fe that crossed the threshold was only in sediment namely 20 mg/L. The level of Hg and Pb pollution in the water and sediment of Losari beach tourism is polluted because it exceeds quality standards.
Bioelectrochemical Systems (BESs) Technology for The Production of Electrical Energy from Kepok Banana Stem Chadijah, Sitti; Firnanelty, Firnanelty; Baharuddin, Maswati Baharuddin; Sappewali, Sappewali
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-sit

Abstract

Bioelectrochemical Systems (BES) technology is a method for generating electric energy using bacteria as catalysts. The electricity is produced by Microbial Fuel Cells (MFCs), which represent the latest development in biological energy research. This study utilized substrates from banana stems and the bacterium Pseudomonas sp. The research aims to assess the potential of banana stems as a substrate in the MFC system and to determine the effects of adding a combination of an electrolyte solution and an appropriate buffering material to achieve maximum current, potential difference, and power density values. The results showed that the maximum current and potential difference achieved were 1.05 mA and 0.62 V, respectively, with a power density value of 446 mW/m². When combining the KMnO4 electrolyte solution with sodium phosphate buffer, a potential difference of 0.76 V and a current of 1.75 mA were obtained, resulting in a power density value of 911 mW/m². By using the K3[Fe(CN)6] electrolyte solution buffer with potassium phosphate buffer, a current of 1.14 mA was produced, and the power density value reached 406 mW/m².
Gelatin from Jerbung Shrimp Shells (Fenneropenaeus marguiensis de Man) Using Three Types of Solvent: Acetic Acid, Phosphoric Acid, and Sulfuric Acid Sjamsiah, Sjamsiah; Firnanelty, Firnanelty; Manesa, Sri Haerani Dg; Cahyani, Andi Imas; Rahmawati, Sari
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 1 (2024)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v9i1.23354

Abstract

Gelatin is a type of protein consisting of amino acids produced through the hydrolysis of collagen. One natural source that can be used as a raw material for making gelatin is the shrimp shell. This study aims to determine the characteristics of gelatin made from Jerbung shrimp shells (Fenneropenaeus marguensis de Man) using three types of acid solvents, namely, acetic acid, phosphoric acid, and sulfuric acid. The hydrolysis process by soaking with acid solvent was carried out with varying concentrations of 1%, 3% and 6%. The results of the analysis of the physical characteristics of gelatin with acetic acid, sulfuric acid and phosphoric acid were suitable for SNI. The pH values ranged from 4.5–6.5, the water content was less than 16%, the ash content was 3.25%, the viscosity ranged from 1.5–7 cP, and the gel strength ranged from 50–300 blooms. The FTIR data of gelatin synthesized from 3 types of acids revealed typical absorption peaks, such as N–H and O–H functional groups at wavenumbers of 3600–3400 cm-1, C–H groups 3000–2840 cm-1, and C=O groups at wavenumbers of 1800–1650 cm-1. These results indicate that Jerbung shrimp shells have potential as alternative raw materials for making gelatin.
Comparison of Air Contact And Distilled Water Distribution Method in The Conversion of Cao to Ca(OH)2 As A Precursor Hydroxyapatite Synthesis Firnanelty, Firnanelty; Abubakar, Andi Nur Fitriani; Qurniawan, Anas; Syam, M. A.
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 8, No 3 (2023): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v8i3.78348

Abstract

Eggshells containing CaCO3 have potential as bioceramics for several tissue engineering applications. The content of CaCO3 converted into Ca(OH)2 can be used as a precursor to implant material. The purpose of the study was to compare two methods of converting CaO into Ca(OH)2 as the primary material for making hydroxyapatite. The method used is direct contact with air and dissolution with water. Hydroxyapatite synthesis using Ca(OH)2 is calcined from CaCO3 with a sintering temperature of 900 °C. The result of calcination is in the form of CaO. The stages of obtaining Ca(OH)2 by converting CaO using two methods, namely direct contact with air and dissolution with water. The XRD characterization results obtained that Ca(OH)2 results from direct contact with air show the formation of phase (portlandite), which is characterized by its presence at the highest typical 2θ angles = 18.18°, 28.68°, 34.30°, 47.40°, 50.92°, 54.16°, and 62.62°. The XRD Ca(OH)2 pattern with the distilled water distribution process shows the formation of a phase (portlandite) characterized by its presence at angles of 2θ = 18.18°, 28.68°, 34.30°, 47.40°, 50.92°, 54.16°, and 62.62 °. The results of FTIR Ca(OH)2 characterization of air contact and water dissolution showed strong O-H functional groups at wave numbers 3643 cm-1 and 3642 cm-1, C-O groups at 1487 cm-1 and 1483 cm-1. This suggests that both methods can convert CaO to Ca(OH)2, which synthesizes hydroxyapatite. The hydroxyapatite characterization results obtained have met the standard.
Identification of The Lohman Brown Strain Purebred Chicken's Eggshells Based on Egg Age Qurniawan, Anas; Firnanelty, Firnanelty; Busrah, Zulfiqar; Baso Kaswar, Andi; Hifizah, Amriana; Astati, Astati; Rusny, Rusny
Jurnal Sains dan Teknologi Peternakan Vol 6 No 1 (2024): Jurnal Sains dan Teknologi Peternakan
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/jstp.v6i1.4297

Abstract

This study aimed to identify the shell quality of Lohman brown strains. A total of 460 eggs aged 1–14 days from Lohman brown strains were collected from community farms in Gowa, South Sulawesi, Indonesia. The study variables included egg weight, egg index, shell weight, thickness, and percentage. Analysis was conducted using analysis of variance (ANOVA), and the difference in shelf life was analyzed using Duncan's multiple range test. The results revealed that egg weight, egg index, shell weight, shell thickness, and shell percentage significantly (P<0.05) affected egg age from 1 to 14 days. The study concluded that older Lohman Brown strain chicken eggs have reduced weight and shell thickness. Additionally, egg age significantly impacts shell weight, but shell thickness decreases as the egg ages. The color classification of eggshells over 14 days, as indicated by hex codes and sRGB values, shows significant variation, with the darkest brown occurring on days 6 and 11 and the lightest brown on day 1.
Evaluasi Kinerja Dye-Sensitized Solar Cell (DSSC) Terstabilkan dengan Pewarna dari Ekstrak Kulit Buah Solanum melongena L Aisyah, Aisyah; Halisa, Halisa; Ramadani, Kurnia; Firnanelty, Firnanelty; Zahra, Ummi; Nur, Arfiani; Patunrengi, Iswadi Ibrahim
Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Vol 26, No 1 (2025): CHEMICA
Publisher : Jurusan Kimia FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/chemica.v26i1.73440

Abstract

Ekstrak kulit terong ungu telah banyak dikaji penggunaannya sebagai zat warna pada Dye-Sensitized Solar Cell (DSSC). Konversi foton menjadi energi listrik sangat ditentukan oleh kestabilan zat warna dan semikonduktor TiO2 selama proses absorpsi foton sinar matahari. Penelitian ini bertujuan untuk mengetahui potensi ekstrak kulit buah Solanum melongena yang distabilkan tingkat keasamannya sebagai zat warna pada DSSC. Ekstrak zat warna diperoleh melalui maserasi dengan metanol dan selanjutnya dikarakterisasi dengan Uji Fitokimia, Spektroskopi Uv-Vis dan FTIR. DSSC difabrikasi menggunakan zat warna tersebut pada semikonduktor TiO2 yang distabilkan oleh polivinil alkohol. Performa DSSC dievaluasi melalui pengukuran arus dan tegangan pada DSSC di bawah paparan sinar matahari secara langsung.  Hasil pengukuran arus tegangan menunjukkan bahwa ekstrak Solanum melongena yang distabilkan pada  pH 2 dapat meningkatkan nilai konversi energi sebesar 0,71%. Penstabilan semikonduktor TiO2oleh polivinil alkohol tidak berpengaruh signifikan pada peningkatan nilai konversi. Optimasi lebih lanjut dengan metode lain dan bersama faktor-faktor lainnya diharapkan dapat meningkatkan kestabilan dan nilai konversi energinya.Ekstrak kulit terong ungu telah banyak dikaji penggunaannya sebagai zat warna pada Dye-Sensitized Solar Cell (DSSC). Konversi foton menjadi energi listrik sangat ditentukan oleh kestabilan zat warna dan semikonduktor TiO2 selama proses absorpsi foton sinar matahari. Penelitian ini bertujuan untuk mengetahui potensi ekstrak kulit buah Solanum melongena yang distabilkan tingkat keasamannya sebagai zat warna pada DSSC. Ekstrak zat warna diperoleh melalui maserasi dengan metanol dan selanjutnya dikarakterisasi dengan Uji Fitokimia, Spektroskopi Uv-Vis dan FTIR. DSSC difabrikasi menggunakan zat warna tersebut pada semikonduktor TiO2 yang distabilkan oleh polivinil alkohol. Performa DSSC dievaluasi melalui pengukuran arus dan tegangan pada DSSC di bawah paparan sinar matahari secara langsung.  Hasil pengukuran arus tegangan menunjukkan bahwa ekstrak Solanum melongena yang distabilkan pada  pH 2 dapat meningkatkan nilai konversi energi sebesar 0,71%. Penstabilan semikonduktor TiO2 oleh polivinil alkohol tidak berpengaruh signifikan pada peningkatan nilai konversi. Optimasi lebih lanjut dengan metode lain dan bersama faktor-faktor lainnya diharapkan dapat meningkatkan kestabilan dan nilai konversi energinya.
Adsorption of Inorganic and Organic Waste of Chemistry Laboratory by Using Eggshell-based CaO Karim, Kurnia Ramadani; Firnanelty, Firnanelty; Fadhilah, Nur
Indonesian Journal of Chemical Research Vol 13 No 2 (2025): Edition for September 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2025.13-kur

Abstract

Laboratory activities are closely related to using corrosive, acidic, and toxic chemicals in producing inorganic and organic waste, such as heavy metals, resulting from chemical reactions, and organic waste originating from ethanol solvents. Adsorption can be an appropriate waste handling step to reduce metal levels in waste. CaO can be used as an adsorbent through several mechanisms. One involves the basic nature of CaO, which forms ionic bonds with acidic compounds in the environment, so these molecules or ions can be adsorbed on the CaO surface. The aims are to characterize CaO and to determine the amount of adsorption power of the CaO catalyst on metals (Pb and Cd) and organic waste (ethanol) originating from the chemistry laboratory. The SSA measurement showed that the waste tested contained the highest levels of Cd and Pb metals, namely 16.82 ppm and 1.52 ppm. The adsorption results using CaO showed that the absorption capacity for Cd and Pb metal was up to 99%, while for ethanol, it was around 20%. It showed that CaO can be used as an adsorbent for laboratory waste.
TiO2-Activated Carbon Elaeis Guineensis Jacq Composite Degraded COD and BOD at Batua Raya Waterways Rasyid, Firnanelty; Chadijah, Sitti; Windasari, Windasari
Chimica et Natura Acta Vol 12, No 1 (2024)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v12.n1.48959

Abstract

Activated carbon is an important material for purification, adsorbent and catalyst in the chemical industry. This research has been carried out to determine the photocatalytic activity of the modified catalyst and adsorbent TiO2-activated carbon for reduce of COD and BOD of canal water. Carbon composite was successfully synthesized with mixture of two materials that have different physical and chemical properties. Modification TiO2 with porous material was carried out to determine the optimum mass and contact time for reduce COD and BOD in waterways using photocatalysis method. Activated carbon have made from oil palm bunches through the carbonization process. The composite was tested the optimum TiO2-activated carbon with a ratio of 2:0.4 g which was applied into canal water for 60 minutes. The result showed that COD value was 99.65% and BOD 94.44%. The result of SEM data image showed that activated carbon blocked TiO2 clotting and spread on activated carbon. So that TiO2-activated carbon composite can be used to reduce of COD and BOD level in waterways
Co-Authors Abubakar, A. Nur Fitriani Abubakar, Andi Nur Fitriani Ahmad Bikharuddin Aisyah Aisyah Aisyah Aisyah Aisyah Aisyah Aisyah Rusdin Amriana Hifizah Anas Qurniawan Andi Nur Fitriani Abubakar Andi Nur Fitriani Abubakar Arfiani Nur Aspina Damayanti Asriani Ilyas Asriani Ilyas Astati, Astati Awaluddin Awaluddin Baharuddin, Maswati Baharuddin Baso Kaswar, Andi Busrah, Zulfiqar Cahyani, Andi Imas Febryanti, Amalyah Firdaus Firdaus Halisa, Halisa Iin, Iin Novianty Irnaningsih Karim, Kurnia Ramadani Manesa, Sri Haerani Dg Maswati Baharuddin Melati Masri Muhammad, Rusny Nugraha, Muh. Imam Dyan Nugraha Imam Dyan Nur Fadhilah Nurfadillah Patunrengi, Iswadi Ibrahim Rahmawati, Sari Ramadani, Kurnia Rezeki, Rezeki Rezki Nur Damayanti Sahyuni Hamzah Sappewali, Sappewali Sitti Chadijah Sjamsiah, Sjamsiah St Chadijah St. Aisyah Syahdam Karneng Syam, M. A. Syarifah Rabiatul Adawiah, Syarifah Rabiatul Titik Andriani Titik Andriani, Titik Ummi Zahra, Ummi Windasari Windasari, Windasari