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Contact Name
Ari Pramudyantoro
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ajche.ft@ugm.ac.id
Phone
+62274555320
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ajche.ft@ugm.ac.id
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Jln. Grafika No. 2 Kampus UGM Yogyakarta Indonesia 55281
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INDONESIA
ASEAN Journal of Chemical Engineering
ISSN : 26555409     EISSN : 26555409     DOI : https://doi.org/10.22146/ajche.52004
The ASEAN Journal of Chemical Engineering publishes papers on Chemical Engineering, specifically but not limited to the areas of thermodynamics, reaction kinetics, transport phenomena, process control, environment, energy, biotechnology, corrosion, separation science, powder technology, materials science, and chemical engineering education
Articles 268 Documents
Betain and Alcohol-based Deep Eutectic Solvents for Vitexin Extraction from Binahong (Anredera cordifolia) Leaves Wardhani, Kamarza; Krisanti, Elsa A.; Andika, Geraldi
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (510.248 KB) | DOI: 10.22146/ajche.49530

Abstract

Deep eutectic solvents (DESs) consisting of betaine as the hydrogen donor acceptor and a propanediol or a butanediol as the hydrogen bonding donor were used to extract vitexin from the leaves of Anredera cordifolia (Ten.) Steenis, known in Indonesia as binahong used traditionally to treat wounds. The vitexin extraction yields depend strongly on the molecular structure of the hydrogen bonding donor used and the betaine to alcohol molar ratio. The highest extraction yield of 0.024%, w/w vitexin in binahong leaves, was obtained at room temperature using the mixture of betaine and 1,3-propanediol in 1:4 mole ratio. For each set of DESs having a common HBD, the highest extraction yield was consistently obtained using the DES having betaine to alcohol molar ratio of 1:4. A higher extraction yield of 0.042% was obtained as the extraction temperature was increased to 40 °C. This study shows that DESs made of betaine and polyalcohol are prospective green solvents for extraction of bioactives such as vitexin from plants.
Development of a Method through Digital Image Analysis for Analyzing Polyaniline Based Sensors for Total Volatile Basic Nitrogen (TVBN) as Fish Freshness Indicators Maravillas, Manna Joanna; Mendenilla, Althea Mae; Merino, Adrian Fernando; Quinto, Edna
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (568.067 KB) | DOI: 10.22146/ajche.49531

Abstract

Food spoilage is a prevailing issue to society. This study addresses it by developing a freshness indicator using polyaniline through digital image analysis that monitors the condition of fish, which release amine vapors upon spoilage. The Polyaniline film prepared is analyzed through its digital image captured by a smartphone camera. The images? RGB values were measured through the use of ImageJ Software. The RGB values are dependent on the film?s color, which reflects the effect of trimethylamine exposure. This study includes film preparation, analysis of the film?s RGB values upon exposure to trimethylamine standard and headspace of a real sample, and the results? comparison with the UV-Vis Spectrophotometry?s. Results are: Blue color value signal stability: 1.72% RSD, Repeatability test RSD: 35.68%, Blue value LOD: 0.01384M, Blue color value sensitivity: 248.87 color value change/molar concentration with linear coefficient of R²=0.97391. Spectrophotometry?s results were more accurate as expected. Nevertheless, determination through RGB values produced acceptable results. However, data acquisition for the ImageJ software application, the configuration of the optical system, and data treatment can still be improved. The method showed promising results for detecting volatile nitrogen samples such as amines in fish samples as they begin to spoil, using a smart phone.
Utilization of Modified Indonesia Natural Bentonite for Dye Removal Warsono, Harish Reza Septiano; Kurniawan, Winarto; Hinode, Hirofumi
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (676.714 KB) | DOI: 10.22146/ajche.49532

Abstract

Bentonite is clay mineral with many applications such as adsorbent, ion exchanger or catalyst support. Indonesia possesses high quantity of natural bentonite reserves, however, due to the limited knowledge about its properties and potential applications, the utilization is still not yet fully maximized. To address this problem, this research aimed to characterize the properties of Indonesian natural bentonite and study its capability in removing dye pollutants as an alternative application of Indonesian natural bentonite. Characterization of Indonesian natural bentonite was successfully conducted and the result showed that it had adequate properties to be utilized. Further modification with pillaring treatments using Al, Cu, Mn, and Ti were also successfully done to intercalate the metal pillaring agent into the bentonite bulk. Dye pollutants removal test showed that Indonesian natural bentonite and its modified forms were able to remove some dye pollutants from aqueous water system. The removal of the dyes was mainly influenced by the charge of the dyes as well as the pore size of the bentonites samples. Study on the influence of pH showed that cationic dye removal was promoted at high pH, while the removal of anionic dyes were promoted at low pH.
Sulfuric Acid Resistance of Geopolymer Mortars from Co-combustion Residuals of Bamboo and Kaolin Purbasari, Aprilina; Samadhi, Tjokorde Walmiki; Bindar, Yazid
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (679.861 KB) | DOI: 10.22146/ajche.49533

Abstract

This study presents an investigation of the durability and microstructure of geopolymer mortars from co-combustion residuals of bamboo and kaolin when exposed to 5% sulfuric acid solution for 2, 4, and 6 weeks, respectively. Geopolymer mortars sized 5 x 5 x 5 cm were prepared from co-combustion residuals of bamboo and kaolin with alkaline activators, i.e. mixture of 10 N potassium hydroxide solution and sodium silicate solution, and cured at 60 oC in oven for 8 hours and then at room temperature for 28 days. Mortars from ordinary Portland cement were also prepared as control mortars. The parameters studied were visual appearance changes, mass changes, compressive strength changes, and microstructure changes. Microstructure changes were examined using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results revealed that geopolymer mortars showed better sulfuric acid resistance compared to ordinary Portland cement mortars in terms of lower mass loss and lower compressive strength loss.
Anionic Dye Adsorption from Aqueous Solutions by Chitosan Coated Luffa Fibers Seedao, Cherdphong; Rachphirom, Tanawat; Phiromchoei, Methinee; Jangiam, Witawat
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (773.766 KB) | DOI: 10.22146/ajche.49534

Abstract

Chitosan (CS) is biopolymer derived from deacetylation of chitin which can be found mainly in crustacean shells such as shrimp, crab, lobster etc. CS powder has been used to remove dye in many research. However, it was difficult to separate CS powder from aqueous solution. Considering the three-dimensional sponge natural structure of luffa fiber. it may address this issue by coating CS onto the surface of luffa fiber. This adsorbent was called chitosan coated luffa fiber (CS-LF). The aim of this studied is to investigate the potential of CS-LF to remove the anionic dye. Congo red is representative of anionic dye. Adsorption of anionic dye from aqueous solution using CS-LF was studied in a batch system. The effect of chitosan concentration coated on luffa fiber and initial anionic dye concentrations had been investigated on adsorption equilibrium and adsorption kinetic. An adsorption isotherm data were regularly analyzed using Langmuir and Freundlich isotherm models. While, adsorption kinetic were basically evaluated by pseudo-first-order, pseudo-second-order and intraparticle diffusion equation. The results showed that the adsorption isotherm fitted well by Langmuir isotherm model with maximum adsorption capacity 20.37 mg/g. The anionic dye adsorption kinetic of CS-LF were greatest described by pseudo-second-order equation and rate-controlling step of anionic dye adsorption process may be chemical reaction. Therefore, CS-LF is potential adsorbent as low-cost adsorbent to remove anionic dye from aqueous solution and could be simply separated from aqueous solutions after used. Finally, our study is firstly report in anionic dye adsorption using chitosan coated luffa fiber.
Physicochemical and Rheological Properties of Sago (MetroxylonSagu) Starch Modified with Lactic Acid Hydrolysis and UV Rotary Drying Sumardiono, Siswo; Rakhmawati, Rizki B; Pudjihastuti, Isti
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (353.575 KB) | DOI: 10.22146/ajche.49535

Abstract

Modification of sago starch using acid hydrolysis will change some physicochemical and rheological properties. Sago is easy to grow in tropical areas of coastal areas, many found in eastern Indonesia has a simple ergonomic terms. Ingredients of sago starch is consist of 20-30% amylose and 70-80% amylopectin which make sago starch difficult to dissolve in cold water, easy to gelatinize, high viscosity, hard and not expands in baking process. This study will analyse modified sago using lactic acid hydrolysis method and use UV rotary drying for 20 minutes. The properties of modified sago starch were observed i.e. pH, density, solubility, swelling power, and baking expansion. Time variables hydrolysis is 10; 15; 20; 25; and 30 minutes with a rotation speed of 8 rpm at room temperature. The results showed that the solubility, swelling power and baking expansion was increase. The density results showed that the longer acid hydrolysis time can make the smaller in the density. Solubility and swelling power showed increasing significantly compared to native sago starch. Modification by using UV light changes significantly the properties characteristics of product.
Study of Suspended Impurities Origin and Composition in the Treatment Process of Johkasou System Trianda, Yenni; Desmiarti, Reni; Fujisawa, Tomonari; Ishiguro, Yasushi; Li, Fusheng
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (595.084 KB) | DOI: 10.22146/ajche.49536

Abstract

Johkasou system is widely used in Japan for household wastewater treatment and have played important roles in maintaining the water environment. However, out of the total units used in Gifu Prefecture, about 10% cannot meet the quality requirement for the effluent transparency above 30 degrees. Previous studies have shown clearly that the reason is mainly attributed to suspended impurities that remain in the water after treatment, with more than 96% being consisted of fine particles with sizes of 0.5-1.0 ?m. A detailed investigation for identifying the origin and composition of the fine particles is necessary in order to find the approaches to improve the treatment function of the related Johkasou units. The analysis by Flow Cytometry suggested that the organic fine particles could be grouped into bacterial fraction, existed in all tanks of the Johkasou, and non-bacterial fraction that was confirmed mainly existed in anaerobic tanks, thus suggesting the lower transparency of Johkasou's effluent was greatly contributed by the bacterial fraction. PCR-DGGE further identified that some of the bacteria contained in the effluent were originated from the anaerobic tank.
Optimization for Production Tert-Butyl Oleyl Glycoside Nonioic Surfactant Using Response Surface Methodology Pawignya, Harsa; Kusworo, Tutuk Djoko; Pramudono, Bambang
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.703 KB) | DOI: 10.22146/ajche.49537

Abstract

The development of surfactant production process strongly influenced by the potential use of raw materials and products that are environmentally friendly. For raw materials such as surfactants are carbohydrate-based material utilization example, glucose, which is reacted with tert-butanol, to form tert-butyl glycoside (TBG), then TBG can be esterified with oleic acid forming surfactant tert-butyl oleyl glycoside (TBOG). This study aims to obtain the optimum conditions TBOG production process of esterification reactions TBG and oleic acid catalyst the para toluene sulfonic acid using response surface method to reach optimum yield TBOG. The independent variable used is the mole ratio of TBG with oleic acid, percent of the catalyst and a temperature. Optimization results obtained optimum conditions of mole ratios of 1: 4.096; 2.33 percent of the catalyst and the temperature of 96.04 °C with a TBOG yield of 92.46%, with a TBOG content of 91.72 %. Based on the HLB value of the surfactant TBOG is 3.87, then these surfactants can be used as an emulsifier of water-in-oil.
Investigation of Solute Diffusion through Polyvinyl Alcohol/ Polyallylamine Ultrafiltration Membrane Ariono, D; Wardani, A K; Aryanti, P T P; Wenten, I G
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (952.323 KB) | DOI: 10.22146/ajche.49538

Abstract

Ultrafiltration membrane has been widely used for several applications due to their high separation capacity, high selectivity, and low operating pressure. In this work, solutes diffusion through polyvinyl alcohol/polyallylamine ultrafiltration membrane was investigated. The membrane was prepared by phase inversion method with glutaraldehyde as crosslinking agent. Meanwhile, NaCl and CaCl2 were used as solutes, either as a single or double solute. The results showed that the increase of polyallylamine concentration led to the increase of membrane swelling degree. For both single and double solutes, diffusion of Na+ and Ca2+ were slightly decreased with the increase of swelling degree. However in double solute diffusion, there was interaction between Na+, Ca2+, and membrane that made Na+ ions moved faster and Ca2+ ions moved slower compared to single solute diffusion. In addition, the increase of solute concentration led to the increase of Na+ diffusion coefficient and the decrease of Ca2+ diffusion coefficient.
Study of Polymeric Membranes Potential for Eugenol Purification from Crude Clove leaf Oil Kusworo, Tutuk Djoko; Soetrisnanto, Danny; Widayat, Widayat; Budiyono, Budiyono; Utomo, Dani Puji
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.391 KB) | DOI: 10.22146/ajche.49539

Abstract

Clove oil is an agricultural commodity with economic value. This essential oil can be obtained from flowers, stems, and leaves of clove plants. The quality of clove oil can be evaluated from eugenol levels in oil. An increase in eugenol levels from 70% to 98% can increase oil prices by up to 3 times. Oil obtained from clove leaves has a low eugenol content of 60-70%, therefore the purification is needed to improve the quality of oil. Membrane based separation for eugenol purification was suggested in this paper as new concept in essential oils purification processes. This study aimed to explore the suitable polymer as membrane material for eugenol purification. PES, PA, CA and PI were used in this study, where the membranes were prepared via NIPS technique using manual casting knife to form flat sheet membranes. The membranes were immersed in eugenol to evaluate the solubility. The insoluble membrane was used for purification performance test in membrane filtration cell. The results show that PES and PA membranes were completely dissolved in eugenol in less than 1 minute, while PI and CA membranes were insoluble in eugenol. However, the PI membrane has much lower solvent permeability than CA membrane. The thermal annealed PES membrane for 3 h at 180°C dissolved in eugenol in 30 minutes for complete dissolution. It is concluded that PI and CA membranes can be used as membrane material for eugenol purification but CA more favorable, while PES membrane has a potential for similar purposes after being thermal annealed. However, these findings can offer an important reference for the application of polymeric membranes for clove oil purification through an effective and efficient process.

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