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All Journal Journal of Natural Sciences and Mathematics Research Pelita Eksakta SPIN: Jurnal Kimia & Pendidikan Kimia Jurnal Pijar MIPA MASALIQ: Jurnal Pendidikan dan Sains
Away, Romy Dwipa Yamesa
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Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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The efficiency of the Heterogeneous Photo-Fenton Process for Methyl Orange Degradation: A Review Fatmawati, Rani; Dewata, Indang; Nasra, Edi; Away, Romy Dwipa Yamesa
Jurnal Pijar Mipa Vol. 20 No. 2 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i2.8606

Abstract

Methyl orange dye is an organic pollutant often found in textile industry waste and harms the environment due to its nature, which makes it difficult to decompose naturally. One method that has attracted attention in its processing is the Photo-Fenton process, which utilizes hydroxyl radicals (•OH) as powerful degradation agents. This article summarizes recent developments in applying heterogeneous Photo-Fenton to Methyl Orange degradation, focusing on degradation efficiency, factors influencing reactions, and degradation pathways. This study discusses the influence of reaction parameters such as initial pH, H₂O₂ concentration, catalyst concentration and light intensity on the degradation rate. In addition, various types of heterogeneous catalysts, including metal oxide-based and ferrous composites, were analyzed based on their effectiveness and stability in the Photo-Fenton system. The Methyl Orange degradation pathway is proposed based on an intermediate product identified in previous studies, suggesting that the reaction proceeds through a gradual oxidation mechanism until simpler and more environmentally friendly compounds are formed. The results of this study show that the heterogeneous Photo-Fenton system provides advantages over homogeneous systems, especially in increasing degradation efficiency and prolonging the catalyst reactivity cycle. The use of heterogeneous catalysts allows for the formation of larger numbers of active species, thus accelerating the breaking of the Methyl Orange structure. In addition, further research is needed to improve the stability of the catalyst, optimize reaction conditions, and evaluate its potential application on an industrial scale. This study will be a reference for developing a more efficient and sustainable Photo-Fenton-based waste treatment method.
POTENTIAL OF BAMBOO POWDER AS AN ADSORBENT TO REGENERATE USED COOKING OIL Wulandari, Putri; Luthfiyah, Lulu; Jannah, Mizatul; Hidayati, Wahyu; Away, Romy Dwipa Yamesa; Sari, Trisna Kumala
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 7 No. 1 (2025): January - June 2025
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v7i1.13442

Abstract

Penelitian ini mengevaluasi efektivitas bubuk bambu yang diolah menjadi karbon aktif untuk meregenerasi minyak jelantah menggunakan tiga metode: tanpa perlakuan panas tinggi, aktivasi konvensional, dan aktivasi furnace. Aktivasi dengan KOH meningkatkan porositas dan luas permukaan. Parameter utama yang dianalisis meliputi kadar air, asam lemak bebas (FFA), dan bilangan peroksida (PV). Hasil penelitian menunjukkan bahwa arang aktif metode furnace memiliki kinerja terbaik, menghasilkan kadar air 0,05%, memenuhi SNI 7709:2019 (< 0,1 %). Sebaliknya metode konvensional dan serbuk bambu menghasilkan kadar air masing-masing sebesar 0,12% dan 0,66%. Kandungan FFA terendah sebesar 0,23 % juga terdapat pada arang aktif tungku memenuhi SNI 01-3741 2002 (<0,3%). Selain itu, bilangan peroksida yang dihasilkan arang aktif dengan metode furnace adalah 6,3 mek O2/kg, lebih baik dibandingkan metode konvensional (9,7 mek O2/kg) dan bubuk bambu (13,3 mek O2/kg), keduanya memenuhi SNI No. 01-3741-2013 (< mek 10 O2/kg). Kinerja arang aktif dengan metode furnace unggul disebabkan oleh porositasnya yang optimal, peningkatan kandungan karbon aktif, sifat hidrofobik, dan kemampuan interaksi dengan pengotor. Oleh karena itu, arang bambu yang diaktifkan dengan metode furnace menunjukkan potensi sebagai adsorben yang efektif untuk meregenerasi minyak jelantah.   This research evaluates the effectiveness of bamboo powder processed into activated carbon for regenerating used cooking oil using three methods: no high heat treatment, conventional activation, and furnace activation. The activation with KOH enhances porosity and surface area. Key parameters analyzed included water content, free fatty acids (FFA), and peroxide value (PV). The results indicated that furnace-activated charcoal performed best, yielding an oil content of 0.05%, which is compliant with SNI 7709:2019 (<0.1%). In contrast, conventional and bamboo powder methods produced water contents of 0.12% and 0.66%, respectively. The lowest FFA content of 0.23% was found in the furnace-activated charcoal, which meets the SNI 01-3741-2002 standard (<0.3%). Additionally, the peroxide value was 6.3 meq O2/kg, which is lower than the conventional method (9.7 meq O2/kg) and bamboo powder (13.3 meq O2/kg), both of which meet SNI No. 01-3741-2013 (<10 meq O2/kg). The furnace-activated charcoal's superior performance is attributed to its optimal porosity, increased active carbon content, hydrophobic properties, and interaction capabilities with impurities. Thus, furnace-activated bamboo charcoal shows promise as an effective adsorbent for regenerating used cooking oil.
Ekstraksi dan Karakterisasi Pektin dari Limbah Kulit Pisang Ambon (Musa paradisiaca var. sapientum L.) Tasya, Sindi Idriana; Away, Romy Dwipa Yamesa
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6588

Abstract

The underutilization of banana peels, which are often regarded as agricultural waste, serves as the basis for this study, given their actual potential as a natural biopolymer source rich in cellulose, hemicellulose, pectin, lignin, and protein. This research aims to explore the potential use of banana peel waste as a raw material for pectin production, with the dual objective of mitigating environmental problems and promoting the development of value-added materials. The method employed involved pectin extraction from banana peel powder using hydrochloric acid (HCl). The results indicated that the extracted pectin constituted 3.96% of the banana peel powder by weight and demonstrated gelling ability. The extracted pectin had an equivalent weight of 4166.66 mg, a methoxyl content of 6.94% classified as low methoxyl pectin (LMP), a degree of esterification of 90.26%, categorizing it as high ester pectin, and a galacturonic acid content of 43.65%. According to the quality parameters established by the International Pectin Producers Association (IPPA), the extracted pectin was of reasonably high purity. These findings suggest that banana peels have significant potential as an environmentally friendly and industrially applicable alternative source of pectin.
Pemanfaatan Limbah Cangkang Kerang Darah sebagai Adsorben untuk Adsorpsi Zat Warna Methyl Orange Aprilianti, Cindy; Away, Romy Dwipa Yamesa
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6784

Abstract

Methyl orange is a toxic, carcinogenic, and mutagenic dye commonly found in textile industry wastewater, posing a serious threat to the environment. This study aims to determine the optimal conditions for the adsorption of methyl orange using a natural adsorbent derived from blood clam (Anadara granosa) shell waste, which remains underutilized despite being abundant and rich in calcium oxide (CaO). The methodology consisted of three main stages: adsorbent preparation, adsorption process, and concentration analysis using UV-Vis spectrophotometry. The variables investigated included adsorbent mass (7, 9, 11, and 13 grams), contact time (20, 40, 60, and 100 minutes), and solution pH (1, 3, 5, and 7). In addition, CaO content was analyzed using X-Ray Fluorescence (XRF) after the calcination process. The results indicated that the optimal adsorption condition was achieved with 11 grams of adsorbent, 60 minutes of contact time, and a solution pH of 1, resulting in an adsorption efficiency of 85.35%. XRF analysis revealed that the blood clam shell contained 97.704% CaO, which significantly contributed to its adsorption performance. These findings demonstrate that blood clam shell waste has strong potential as a low-cost, efficient, and environmentally friendly alternative adsorbent for treating textile dye wastewater.
Pemanfaatan Limbah Kulit Buah Nanas dan Jeruk untuk Produksi Eco Enzyme: Uji Fosfor, Kalium, pH, dan TDS Putri, Molsa Vitaloka; Kurniawati, Desy; Away, Romy Dwipa Yamesa
MASALIQ Vol 5 No 6 (2025): NOVEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i6.7562

Abstract

The limited research on the use of pineapple and orange peel waste as base materials for eco enzyme production forms the background of this study, despite their high potential as environmentally friendly solutions for organic waste management. This study aims to analyze the characteristics of eco enzyme produced from the fermentation of pineapple and orange peel waste, through phosphorus and potassium tests, as well as measurements of pH and Total Dissolved Solids (TDS). The method employed combines a qualitative approach for phosphorus and potassium testing with a quantitative approach for pH and TDS measurements, using samples from various fruit peel fermentation treatments. The results showed that the resulting eco enzyme had a yellowish-brown, slightly turbid appearance, with relatively high TDS values due to dissolved solid content. The pH values ranged from 3.5 to 4, indicating acidity influenced by organic acids formed during fermentation. Content analysis showed positive results for phosphorus and potassium, supporting its potential use as a liquid organic fertilizer, along with the presence of flavonoids that support its application as a household cleaner or natural disinfectant. The study concludes that pineapple and orange peel waste is an effective and sustainable raw material for eco enzyme production, offering both economic and ecological benefits in household organic waste management.
Batu Kapur sebagai Prekursor Hidroksiapatit: Tinjauan Metode Sintesis, Tantangan, dan Prospeknya Barkah, Nisa’atin; Away, Romy Dwipa Yamesa
MASALIQ Vol 5 No 6 (2025): NOVEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i6.7604

Abstract

Hydroxyapatite (HAp) is a calcium phosphate biomaterial with high biocompatibility, widely utilized in biomedical, cosmetic, and photocatalytic applications. The high production cost of synthetic HAp has driven the search for abundant and environmentally friendly natural alternatives, such as limestone (CaCO₃), as a potential precursor. This article aims to review various limestone-based HAp synthesis methods, including wet precipitation, sol-gel, hydrothermal, and sintering techniques, and to evaluate the influence of process parameters on the Ca/P ratio, phase purity, and crystal morphology. The review is conducted through an analysis of recent literature comparing the performance of each method. Findings indicate that limestone with CaCO₃ content exceeding 95% can produce HAp with a Ca/P ratio approaching the stoichiometric value of 1.67; however, the presence of natural impurities such as Si, Al, Mg, and Fe may lead to the formation of secondary phases, such as β-tricalcium phosphate (β-TCP). Optimization of process parameters, including calcination temperature, pH, and reaction time, is shown to be crucial for enhancing crystallinity and approximating the structure of natural bone. Furthermore, green synthesis approaches employing bio-extracts such as gelatin or leaf extracts contribute to improved homogeneity and particle size control. This review concludes that limestone is an economical and sustainable local source for HAp production, with significant potential for the development of biomimetic materials based on Indonesian natural minerals that are efficient and globally competitive.
Processing Trash Fish into Economically Valuable Animal Feed in Nagari Pilubang, Padang Pariaman Regency Sari, Trisna Kumala; Away, Romy Dwipa Yamesa; Suryani, Okta; Yeni, Isra; Aini, Syamsi; Kurniawati, Desy; Nasra, Edi; Stiadi, Della Rosalynna
Pelita Eksakta Vol 7 No 1 (2024): Pelita Eksakta, Vol. 7, No. 1
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol7-iss1/221

Abstract

There has been concealed on the processing of trash fish into animal feed in Nagari Pilubang, Padang Pariaman Regency. The majority of the Pilubang community are fishermen. However, so far the trash fish caught have not been processed properly. Meanwhile, trash fish has the potential to be used as animal feed because it contains high protein. Through this PKM activity, the community receives education and training regarding the application of technology for processing trash fish into animal feed using appropriate technology. The animal feed was made from trash fish is processed using a fermentation process. From the results of this activity, it is known that community knowledge has increased and is very useful for implementation by the community in Nagari Pilubang
Utilization of Nephelium lappaceum (Rambutan) waste as biosorbent for heavy metals and dyes: a review Rahmadani, Suci; Putra, Rizky Zalmi; Sari, Trisna Kumala; Away, Romy Dwipa Yamesa
Journal of Natural Sciences and Mathematics Research Vol. 9 No. 2 (2023): December
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

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

Abstract

Pollution of environmental streams and ecosystems is rising. One of the sources of water contamination is the wastewater from the textile, plastics, and mining sectors, which contains both organic and inorganic pollutants. Heavy metals and dyes in wastewater must be treated before disposal to protect the aquatic environment and human health. Due to its effectiveness, low cost, and simplicity of use, biosorption has emerged as a wastewater treatment option. Rambutan waste, in particular, is promising for commercial usage due to its extensive availability and efficiency. In this article, we review the usage of natural rambutan peels, seeds, leaves, and stems for the biosorption of water contaminants. We discuss the factors that influence pollutant removal. A pH of 6 to 12 is advantageous for cationic pollutant removal, whereas a pH of less than 5 is appropriate for anionic pollutant removal. More significant concentrations of pollutants generally result in lesser removal, whereas higher doses of biosorbent result in higher removal. The ideal adsorption contact time for rambutan peels and seeds was less than an hour. We also discuss the isotherms of the adsorption process.
Co-Authors Aini, Syamsi Aprilianti, Cindy Barkah, Nisa’atin Della Rosalynna Stiadi Desy Kurniawati Edi Nasra Fatmawati, Rani Indang Dewata Jannah, Mizatul Luthfiyah, Lulu Putra, Rizky Zalmi PUTRI WULANDARI Putri, Molsa Vitaloka Sari, Trisna Kumala Suci Rahmadani Suryani, Okta Tasya, Sindi Idriana Wahyu Hidayati Yeni, Isra