Article Per Year (5 Year)
p-Index From 2021 - 2026
0.947
P-Index
This Author published in this journals
All Journal The Journal of Pure and Applied Chemistry Research IJEMS (Indonesian Journal of Environmental Management and Sustainability) Kinetika Serambi Journal of Agricultural Technology Jurnal Ilmiah AgriSains Jurnal Perikanan
Ramadhini, Tri Karimah
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Energy Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Public Health

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
PENGARUH TEMPERATUR DAN WAKTU REAKSI MINYAK JELANTAH DENGAN ZEOLIT ALAM PADA PRODUKSI BIOFUEL Febriana, Ida; Ramadhini, Tri Karimah; Aulia, Tri
KINETIKA Vol. 11 No. 3 (2020): KINETIKA 01112020
Publisher : Politeknik Negeri Sriwijaya

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

Abstract

Biofuel is an alternative fuel that can be produced with organic resources such as vegetable oil and animal fat. One of the items that can be converted into biofuels is waste cooking oil. Waste cooking oil has a long hydrocarbon chain that allows it to be cracked. Biofuels are produced by catalytic cracking process. Catalytic cracking is a process in which complex hydrocarbon fractions are cracked into smaller, more valuable hydrocarbon. In this process natural zeolite is used by its ability on cracking hydrocarbon fractions. This research aims to get optimum condition of converting waste cooking oil to biofuels and to know the effects of temperature and reaction time on its products produced. The amount of raw materials, type of catalyst and amount of catalyst is preferred as controlled variable in this research, whereas temperature and reaction time is preferred as statistical variable. Biofuels are produced by various temperature such as 280°C-320°C and reaction time on 30 minutes-150 minutes using natural zeolite catalyst which accelerate the reactions. According to the process that has been done, this research obtained optimum process condition at the highest temperature 320°C which reviewed by its yield produced percentage in amount of 9.8147%. Based on various tested parameters including density, viscosity, flash point and GC-MS, biofuels has required the quality standard.
Photocatalytic Degradation of Heavy Metals Cd, Cu, Fe and Pb Using ZnO-Zeolite Nanocomposite Ramadhini, Tri Karimah; Agustina, Tuty Emilia; Melwita, Elda; Wijayanti, Maria Siswi
Indonesian Journal of Environmental Management and Sustainability Vol. 7 No. 4 (2023): December
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2023.7.4.147-152

Abstract

Heavy metals are the main pollutant substances in the environment. Heavy metals are a type of metal with high density and are very dangerous to living organisms, especially humans. Living organisms can adsorb the bioaccumulative and sedimentation of heavy metals that settle in water. Some compounds which found in wastewater including Cadmium (Cd), Copper (Cu), Iron (Fe), and Lead (Pb). These heavy metals cannot naturally degrade, additional processing is required before it being released into the environment. To prevent environmental pollution impacts, wastewater containing heavy metals must be handled properly and optimally. One method that can be applied for wastewater treatment is degradation by photocatalysis, utilizing the assistance of light. This research is to investigate the effect of pH and irradiation time on the degradation of Cd (cadmium), Cu (Copper), Fe (Iron), and Pb (Lead) heavy metals. To enhance the photocatalytic activity, the synthesis of ZnO-Zeolite nanocomposites was conducted. The ZnO-Zeolite nanocomposites produced were analyzed by SEM-EDX and XRD. The utilization of ZnO-Zeolite nanocomposites is deemed effective in reducing heavy metal concentrations. The degradation with Ultraviolet (UV) light exposure runs within 15-120 minutes with pH variation between 4-8. The degradation of heavy metal runs at 60 minutes and 120 minutes showing an optimum percentage removal of metals approaching 100%. The optimum pH values for Cd, Cu, Fe, and Pb are pH 8, pH 7, pH 6, and pH 8, respectively. The sequential metal degradation percentages are 98.96%, 95.43%, 96.07%, and 95.53%, respectively.
Adsorption of Fe Metal Ions in Laboratory Wastewater with Chitosan from Fish Scales Ramadhini, Tri Karimah; Agustina, Tuty Emilia; Fadhlurrahman, M Arif; Nufus, Dian Natasya Alfa; gayatri, Ryaniza
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.2024.013.03.5501

Abstract

Laboratory wastewater contains organic compounds and heavy metals, such as iron (Fe), manganese (Mg), chromium (Cr), and mercury (Hg). These pollute the environment, especially the groundwater. One alternative to process laboratory wastewater by using adsorption method. The adsorption method requires an absorbent. The waste from fish scale was reported contains chitosan and can be applied as adsorbent materials. The paper reports our preparation of chitosan from fish scales. Then, it was applied as adsorbent, and studying the effect of chitosan weight / dose, pH, and stirring time for removal of iron metals ion. The best Fe removal percentage of 99.82% was obtained by using the chitosan dose of 2 g and a stirring time of 60 minutes. The pH condition with the highest Fe removal percentage was at pH 4 (99.98%). The optimum condition then applied to laboratory wastewater. The developed strategic was able to meet the standard for water quality according to Minister of Environment Regulation No. 5 in 2014.
THE EFFECT OF TAPIOCA FLOUR AND MOCAF ADDITION ON THE CHEMICAL CHARACTERISTIC OF SEAWEED CRACKERS Ramadhini, Tri Karimah; Ardhanawinata, Adlina; Diachanty , Seftylia; Irawan, Irman
Jurnal Perikanan Unram Vol 15 No 6 (2025): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v15i6.1985

Abstract

This study evaluated the effect of substituting tapioca flour and Modified Cassava Flour (MOCAF) on the chemical characteristics of crackers formulated with Kappaphycus alvarezii seaweed. Four treatments were prepared with varying proportions of seaweed, tapioca flour, and MOCAF. Chemical analyses included measurements of moisture, ash, protein, fat, carbohydrate and crude fiber content. Results showed that increasing the proportion of seaweed consistently elevated moisture content (5.32-9.23%), ash content (0.98-2.02%), protein content (2.47-4.04%), fat content (0.29-0.52%), carbohydrate content (84.19-90.95%) and crude fiber (1.57-4.04%) levels in the raw crackers. The highest values across all parameters were observed in treatment KR4 (32% seaweed), whereas the lowest values were recorded in treatment KR1 (without seaweed addition). Moisture, ash, and fat content in all treatments complied with the Indonesian National Standard (SNI) for raw crackers. The enhancement in chemical characteristics were primarily attributed to the naturally high levels of fiber, hydrocolloids, minerals, and protein present in Kappaphycus alvarezii seaweed. These findings demonstrate that partial substitution of tapioca and MOCAF flours with seaweed enhances the nutritional profile of crackers, thus potentially yielding products with greater functional value.  
Antioxidant Activities of The Brown Seaweed Sargassum: Narrative Review: Aktivitas Antioksidan Rumput Laut Cokelat Sargassum: Naratif Review Sabela, Bendi; Nurwulan, Afrida; Ramadhini, Tri Karimah; Khanna, Priatno
Jurnal Ilmiah AgriSains Vol. 26 No. 3 (2025): Jurnal Ilmiah AgriSains
Publisher : Fakultas Peternakan dan Perikanan, Universitas Tadulako, Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/jiagrisains.v26i3.2025.163-174

Abstract

Rumput laut cokelat Sargassum merupakan rumput laut yang telah banyak dimanfaatkan untuk produk pangan maupun non pangan. Sargassum memiliki kandungan senyawa bioaktif yang tinggi dan beragam. Sargassum memiliki berbagai macam bioaktivitas terutama antioksidan. Review artikel ini bertujuan untuk menyusun and merangkum data terbaru mengenai senyawa bioaktif dan antioksidan rumput laut Sargassum. Review artikel menggunakan artikel penelitian yang bersumber dari referensi ilmiah ScienceDirect terbitan tahun 2020–2025. Kandungan senyawa bioaktif dari berbagai spesies rumput laut Sargassum, yakni senyawa fenolik (flavonoid, fenol), alkaloid, steroid, terpenoid, saponin, glikosida kardiak, mycosporine-like amino acids, dan pigmen (fukosantin, flobatanin, klorofil-a, klorofil-d, α-karoten, β-karoten, xantofil, fikobiliprotein, dan karotenoid). Senyawa bioaktif utama rumput laut Sargassum, yakni senyawa fenolik (0,09791–521,84 mg GAE/g). Sargassum menunjukkan adanya aktivitas antioksidan pada berbagai metode pengujian (DPPH, FRAP, dan ABTS). Persentase inhibisi aktivitas antioksidan Sargassum berdasarkan metode DPPH berkisar 0,18–89,84% dan ABTS berkisar 64,018–93,94%. Aktivitas antioksidan Sargassum dipengaruhi oleh kandungan senyawa bioaktif, metode ekstraksi, konsentrasi ekstrak, spesies, dan lokasi sampel. Kandungan senyawa fenolik dan aktivitas antioksidan Sargassum berpotensi untuk digunakan dalam pangan fungsional, kemasan, kosmetik, dan farmasi.
Chemical Characteristics and Antioxidant Activity of Fish Skin Collagen: Review Sabela, Bendi; Ramadhini, Tri Karimah
Serambi Journal of Agricultural Technology Vol 7, No 2 (2025): Desember
Publisher : Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/sjat.v7i2.9802

Abstract

Fish skin is a fishery waste product with a high collagen content. This review aims to compile and summarize the latest data on the chemical characteristics and antioxidant activity of fish skin collagen. Fish skin collagen can be extracted using acid, enzymatic, ultrasound, and deep eutectic solvent (DES) methods. The yield of fish skin collagen ranges from 2.2 to 61.5%. The proximate content of fish skin collagen is 36.64–77.5% protein; 0.28–30.43% lipids; 0.43–49.25% ash; and 0.061–10.25% moisture. The most dominant amino acid in fish skin collagen is glycine. The composition of fish skin collagen includes carbon, oxygen, silicon, chlorine, sodium, magnesium, phosphorus, sulfur, potassium, and iron. Fish skin collagen shows antioxidant activity with ABTS (2,2-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid), DPPH (2,2-diphenyl-1-picrylhydrazyl), ORAC (oxygen radical absorbance capacity), FRAP (ferric reducing antioxidant power), OH radical scavenging, and NO radical scavenging methods. The antioxidant activity of fish skin collagen in the DPPH free radical scavenging method is 39.57–40.89%.
Co-Authors Ardhanawinata, Adlina Aulia, Tri Diachanty , Seftylia Fadhlurrahman, M Arif Febriana, Ida gayatri, Ryaniza Irawan, Irman Khanna, Priatno Melwita, Elda Nufus, Dian Natasya Alfa Nurwulan, Afrida Sabela, Bendi Tuty Emilia Agustina Wijayanti, Maria Siswi