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Jurusan Teknik Kimia Universitas Syiah Kuala, Jl. Tgk. Syech Abdur Rauf No.7, Kopelma Darussalam, Banda Aceh, INDONESIA
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JURNAL REKAYASA KIMIA & LINGKUNGAN
Published by Universitas Syiah Kuala
ISSN : 14125064     EISSN : 23561661     DOI : https://doi.org/10.23955/rkl.v18i2.34018
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Energy Engineering
The Journal of Chemical Engineering and Environment is an open access journal that publishes papers on chemical engineering and environmental engineering. The following topics are included in these sciences: Food and biochemical engineering Catalytic reaction engineering Clean energy technology Environmental and safety technology Fundamentals of chemical engineering and applied industrial engineering Industrial chemical engineering Material science engineering Process and control engineering Polymer and petrochemical technology Membrane technology Agro-industrial technology Separation and purification technology Environmental modelling Environmental and information sciences Water and waste water treatment and management Material flow analysis Mechanisms of clean development
Arjuna Subject : Teknik Kimia (semua kategori) - Bioengineering
Articles 319 Documents
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Application of Used Cooking Oil Based Emulsion Liquid Membrane for Rhodamine B Extraction Hidayati, Nur; Kamaratih, Azzahra Ardya; Purnama, Herry
Jurnal Rekayasa Kimia & Lingkungan Vol 19, No 2 (2024): Jurnal Rekayasa Kimia & Lingkungan (December, 2024)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v19i2.37747

Abstract

Used cooking oil is utilized as a nontoxic and environmentally friendly organic diluent without the need for complicated pretreatment. Cationic dye rhodamine B was chosen as a sample because of its ability to decolorize water and its use as a base material in toxic, carcinogenic, and mutagenic textile dyes. This study investigates the extraction of rhodamine B from water using cooking oil-based Emulsion Liquid membrane (ELM) methods. This approach addresses issues associated with petroleum-based organic diluents commonly used in ELM processes. The research aimed to evaluate the effect of rhodamine B concentrations ranging from 5 to 20 ppm and D2EHPA concentrations from 0.5 to 2.5% on extraction efficiency. The emulsion was prepared using used cooking oil as the diluent, Span 80 as the surfactant, D2EHPA as the carrier, and HCl as the internal phase. The concentration of rhodamine B in the external phase was determined using a UV-Vis Spectrophotometer. Both rhodamine B concentration and D2EHPA concentration significantly affected extraction efficiency. The highest extraction efficiency of 92.83% was achieved with a rhodamine B concentration of 15 mg/L and a D2EHPA concentration of 2.5% (v/v).
Activation of Sugarcane Bagasse Biosorbent with Potassium Hydroxide and Hydrogen Chloride to Reduce Color of Batik Wastewater Pramitasari, Noven; Ramadani, Faisal Basri; Azis, Rovy Agustian; Bezariani, Calista Safa; Berliana, Rohinoor Intan; Badriani, Ririn Endah; Kartini, Audiananti Meganandi; Fildzah, Cantika Almas
Jurnal Rekayasa Kimia & Lingkungan Vol 19, No 2 (2024): Jurnal Rekayasa Kimia & Lingkungan (December, 2024)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v19i2.37943

Abstract

The textile industry, particularly the batik sector, significantly contributes to the Gross Domestic Product (GDP) of East Java Province. However, the batik dyeing process, which uses synthetic dyes like remazol, rapid, and naphthol, causes environmental issues due to the non-biodegradable nature of these dyes, leading to environmental pollution such as an increase in color levels in water bodies. This research investigated using activated sugarcane bagasse with KOH and HCl in batch adsorption systems as an alternative method. It compared the color efficiency removal in batik wastewater with variation biosorbent mass, contact time, and activator type. The study found that the highest percentage removal of dye substances was achieved with the KOH-activated biosorbent, reaching 69.46%, and the HCl-activated biosorbent demonstrated a 60.98% removal efficiency with a mass variation of 0.4 grams and a contact time of 30 minutes. Statistical analysis using multiple linear regression showed that independent variables (biosorbent mass, contact time, and activator) significantly affect the dependent variable (color removal efficiency) simultaneously. In the partial test, the independent variables of biosorbent mass and type of activator significantly affect color removal efficiency, but contact time does not significantly affect color removal efficiency.
Properties of Recycled Polyethylene Terephthalate (rPET)/Stearic Acid/Green Mussel Shell (GMS) Composite Ariani, Desi Budi; Nisa, Khadijah Sayyidatun; Aryanti, Fitria Ika; Hanifati, Ghina Sabrina
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i1.45134

Abstract

The increasing accumulation of plastic waste, particularly polyethylene terephthalate (PET), presents significant environmental challenges. This study explores the incorporation of green mussel shell (GMS) as a bio-filler in recycled polyethylene terephthalate (rPET) composites to promote sustainability and circular economy practices. rPET/SA/GMS composites were fabricated using injection molding, with GMS compositions of 0%, 5%, 10%, and 15% and a fixed 1% stearic acid (SA) content as a coupling agent. The effects of GMS on thermal, mechanical, rheological, and morphology properties were analyzed using differential scanning calorimetry (DSC), universal testing machine (UTM), melt flow index (MFI) testing, and scanning electron microscopy (SEM). The results indicate that 10% GMS exhibited the highest melting temperature (249.5C) due to enhanced interfacial interactions, despite a decrease in crystallinity. However, tensile strength decreased significantly at 5% GMS (8.52 MPa) due to weak interfacial bonding, whereas 10% GMS (12.91 MPa) showed slight improvement due to better SA-assisted dispersion. Rheological analysis revealed the highest melt flow rate (162.87 g/10 min) at 5% GMS, but higher GMS concentrations reduced flowability due to increased CaCO content and filler agglomeration. Morphological analysis confirmed that GMS addition increased surface roughness, induced void formation, and disrupted stress transfer, weakening composite integrity. These findings highlight the potential of GMS as a functional bio-filler in rPET composites, emphasizing the need for optimized filler concentration and interfacial modifications to develop sustainable high-performance materials.
Analysis of Gas Sweetening Unit for Natural Gas Using Membrane and aMDEA Technology with High CO2 Concentration > 60 % in XYZ Field Adhiatama, Zenda Christian; slamet, slamet
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i1.39423

Abstract

The XYZ field in Jatibarang, West Java, processes 19 MMSCFD of gas with CO2 content over 60%, which does not meet the 8% CO2 limit required by the gas sales agreement. Traditional absorption technologies, while effective, have high energy demands. This study aims to optimize CO2 removal by combining membrane technology with aMDEA solvent-based absorption. Aspen Hysys software was used to simulate this combined approach, with aMDEA solvent chosen for its low corrosivity and high CO2 absorption rate. The membrane technology reduces CO2 levels initially, while the aMDEA solvent further lowers them to below 8%. Simulation results show that the combined system can reduce CO2 levels to 7.949% with a sweet gas flow rate of 7.108 MMSCFD. The process requires a membrane area of 4,611 m and 172,960 lb/hr of solvent. This approach offers an effective solution for gas sweetening in fields with high CO2 concentrations, providing a more energy-efficient alternative to traditional methods.
Assimilative Capacity of Air Pollutants Using Emission Inventory and Dispersion Model Huboyo, Haryono Setiyo; Samadikun, Budi Prasetyo; Manullang, Okto Risdianto; Khasanah, Nurul
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i1.43810

Abstract

Air pollution in urban areas will increase along with increasing population activity. This study, with the location of Magelang Regency, examines the carrying capacity and capacity of air pollution. The study began with the identification of emission inventories for transportation, household, waste burning and industrial activities. The results of the inventory were used to examine the distribution of air pollutants. The results of the emission inventory in Magelang Regency showed that the transportation sector was the dominant contributor of emissions compared to the waste, household and industrial sectors with an emission load of 2-3.5 times higher. The transportation sector contributes dominantly to the NO2 parameter (94%) and PM parameter (72%), with a relatively similar contribution to the industrial sector in the SO2 parameter (40%). Dispersion modeling showed that the distribution of emissions was even throughout Magelang Regency and showed an accumulation of emissions, especially for the NO2 parameter which was centered on the arterial and collector road networks. When compared to the Ambient Air Quality Standard in Indonesia, the maximum concentration values for SO2, NO2 and PM parameters are still below the quality standard. However, the NO2 parameter needs to be considered because its concentration value has reached 75% of AAQS. Based on environmental carrying capacity, Tegalrejo, Mungkid and Mertoyudan sub-districts are still in good condition, while Secang and Tempuran sub-districts need to carry out mitigation and emission reduction efforts so that air quality is maintained because the air quality index shows moderate and unhealthy quality respectively
Characterization and Effect of NaOH/ZnCl2 Chemical Activation on Nickel-Impregnated Activated Carbon for Biofuel Azzahra, Balqis Ayu; Syam, Azhari Muhammad; Muhammad, Muhammad
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i1.43583

Abstract

The global energy crisis, driven by dwindling fossil fuel reserves and surging energy demand, necessitates a sustainable solution. Therefore, this research aimed to develop sugarcane molasses-based activated carbon as a support for nickel (Ni) catalysts to increase the efficiency of bio-oil conversion into biofuels. In these processes, activated carbon was produced by the dehydrogenation process of sugarcane molasses followed by the wet impregnation method using sodium hydroxide (NaOH) and zinc chloride (ZnCl2) activating agents. The analysis results showed that sugarcane molasses was effectively converted into activated carbon with optimal catalyst-loading properties. Based on the results of SEM-EDS and BET analysis, the activated carbon has a surface area with type III (IUPAC) indicating the presence of mesopores. Additionally, the use of the reflux process with Ni catalyst successfully converted coffee shell pyrolysis oil into hydrazine-based biofuel on the SMNa sample and heptadecane on the SMZn sample. The highest yield, 73.6% was found on SMZn. This research shows the great potential of sugarcane molasses as a raw material for the production of environmentally friendly biofuels while providing economic added value to biomass waste. These results will contribute to biomass energy conversion efforts in Indonesia.
Urban Metabolism: From Molecular Scale to Anthropogenic Systems Brunner, Paul Hans
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i1.45080

Abstract

The aim of this paper is to show how an Urban Metabolism approach can be used for analysing, designing, and optimizing material and energy flows and stocks in human settlements. For this purpose, material flow analysis (MFA) and substance flow analysis (SFA) is applied in a rigid way to quantitatively model metabolic processes such as supply and disposal of goods in a city. The characteristics of relevant material flows and stocks of urban areas in space and time are examined. Results of two metabolic case studies on resources, waste management, and environmental protection are presented. By introducing the so called Activity concept, it is shown how the Urban Metabolism approach is instrumental for the design of sustainable anthropogenic systems. Finally, it is suggested to use the methodology for technology assessments and the optimization of entire anthropogenic systems.
Effect of Glycerol Concentration and Filler Addition on the Properties of Bioplastics Derived from Kepok Banana Corm Starch Nasution, Halimatuddahliana; Manurung, Budi Holfrid; Nofifah, Nofifah
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i1.42461

Abstract

The waste from kepok banana corms and stems has not been well utilized, even as banana production continues to rise, increasing the volume of such waste. In Indonesia, banana production in 2023 reached 9.75 million tons, up from 7.2 million tons the previous year, leading to a corresponding increase in banana waste. This research investigates the effects of glycerol and banana stem filler on the properties of bioplastics made from kepok banana corm starch, aiming to develop a sustainable alternative to conventional plastics. Starch was extracted from kepok banana corms through grinding, filtering, and drying at 80C for 15 minutes. Cellulose filler was produced from banana stems using bleaching with NaOH and H2O2, followed by neutralization and drying to a constant weight. Bioplastics were then produced with filler concentrations of 0%, 2%, 4%, and 6% and glycerol volumes of 1-4 mL per 10 grams of starch, on mixing conducted at 70C in distilled water. Characterizations and tests of the bioplastics included for cristallinity, functional groups, surface morphology, yield, density, water absorption, tensile strength, and elongation. Bioplastics with addition filler performed better than those without filler, with the 6% filler and 2 mL glycerol variation showing the most favorable properties, including a yield of 25.92%, density of 1.14 g/mL, water absorption of 0.24%, tensile strength of 5.49 MPa, elongation of 8%, and a homogeneous surface with well-distributed filler. These findings demonstrate the potential of kepok banana waste-based bioplastics as an environmentally friendly alternative.
Analyzing And Mapping of Sound Pressure Level in The Packing Plant Unit of PT Semen Padang Teluk Bayur Ryansyah, Kenan Muhammad; Lestari, Resti Ayu; Bachtiar, Vera Surtia; Serlina, Yega; Latif, Mhd Talib
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i1.43898

Abstract

The cement industry is one of the strategic industries that has positive and negative impacts. One of the negative impacts is noise pollution. This research aimed to compare the sound pressure level (SPL) to the standard, analyzed the meteorological influence on SPL, and conducted noise level mapping. The noise measurement according to SNI 7231 of 2009. The SPL data was collected by using a Sound Level Meter at 36 points. Additionally, questionnaires were distributed to workers at the PT Semen Padang Teluk Bayur Packing Plant Unit. Measurement of noise used the grid method with sampling points spaced 20-40 meters apart, then analyzed the correlation and influence of meteorological on SPL, and noise mapping with Surfer 27. The results showed that the highest SPL came from the compressor engine at 85.7 dBA, and the lowest SPL was in the office area at 58.1 dBA. The SPL in this study was influenced by meteorological conditions such as temperature, air humidity, wind speed, and air pressure. There was a correlation between temperature and SPL with a value (r) of 0.9936 (very strong) and a correlation between air humidity and SPL with a value (r) of 0.9962 (very strong).
Conversion of Green Coconut Shell and Husk into Biobriquette Using Jatropha seed Adhesive Utami, Putri Agus; Sudarmi, Raudhatul Aulianatia; Sahara, Siti; Anwar, Khairul; Mahidin, Mahidin; Djuned, Fauzi Muhammad
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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

Abstract

Green coconut shell and husk (GCSH) waste had the potential to pollute the environment if not properly utilized. As a solution, innovations in processing GCSH into biobriquettes could generate eco-friendly renewable energy with economic value. This study aimed to optimize the utilization of GCSH as a raw material for biobriquettes by adding jatropha seeds as an adhesive, as well as evaluating the characteristics of the produced biobriquettes. Fabrication of biobriquette was carried out using two methods: conventionally (without burning) and by pyrolysis (with burning) at temperatures of 380C, 430C, and 480C for 3.5 hours. The charcoal obtained from pyrolysis was mixed with jatropha seed adhesive at concentrations of 15%, 20%, and 25%, then molded at a pressure of 110 kg/cm and dried at 105C. The results showed that pyrolysis temperature and adhesive concentration affected the moisture content, ash content, calorific value, compressive strength, and combustion rate of the biobriquettes. Optimum conditions were achieved at a pyrolysis temperature of 430C with the addition of 25% adhesive, resulting in biobriquettes with high calorific value (6367.74 cal/g), low moisture content (7.44%), and good combustion rate (0.10219 g/min). This study proved that utilizing GCSH waste and jatropha seeds for biobriquettes had great potential as an efficient and sustainable source of renewable energy.

Page 30 of 32 | Total Record : 319

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