Jurnal Teknik Kimia dan Lingkungan
JTKL editors welcome manuscripts in the form of research articles, literature review, or case reports that have not been accepted for publication or even published in other scientific journals. Articles published in cover key areas in the development of chemical and environmental engineering sciences, such as: Energy Waste treatment Unit operation Thermodynamic Process simulation Development and application of new material Chemical engineering reaction Biochemical Biomass Corrosion technology The "JURNAL TEKNIK KIMIA DAN LINGKUNGAN" journal is a peer-reviewed Open Access scientific journal published by Politeknik Negeri Malang. This journal first appeared in October 2017. The main purpose of the journal was to support publication of the results of scientific and research activities in the field of Chemical and Environmental Engineering. It is published twice a year in April and October.
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<![CDATA[Pengaruh Daya dan Waktu Terhadap Yield Hasil Ekstraksi Minyak Daun Spearmint Menggunakan Metode Microwave Assisted Extraction ]]>
<![CDATA[Fitria Yulistiani]]>;
<![CDATA[Rizka Khairiyyah Azzahra]]>;
<![CDATA[Yulinda Alhay Nurhafshah]]>
<![CDATA[ Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtkl.v4i1.127
<![CDATA[Spearmint is one type of mint that contains essential oil with carvone (60-70%) as its main component. That component causes mint’s essential oil has antioxidant, antifungal and antibacteria properties. The traditional method to produce essential oil like steam distillation has long and energy consuming processes. The aims of this research were to investigate the influence of microwave power level (100, 180 and 300 Watt) and the extraction time (5, 10, 15 and 20 minutes) used Microwave Assisted Extraction to mint oil’s yield. Furthermore, characterization determined by oil’s colour, refractive index and density. The analysis of chemical component of mint oil was done using Gas Chromatography – Mass Spectrometry (GC-MS). The power level of microwave and extraction time influence to mint oil’s yield is proven in this research. The highest yield (5.17%) is generated at best variation of power and extraction time from the research are at 180 Watt and 15 minutes extraction time. The colour of mint oil is light yellow, refractive index value is 1.362 and density is 0.8758 gram/mL. The result of GC-MS showed that the major component of mint oil is 71% carvone. ]]>
<![CDATA[Penentuan Pelarut Terbaik pada Ekstraksi Tanin Kulit Kayu Akasia dan Pengaruhnya Sebagai Inhibitor Laju Korosi pada Baja Karbon ]]>
<![CDATA[Ayu Ratna Permanasari]]>;
<![CDATA[Tri Reksa Saputra]]>;
<![CDATA[Aprillia Nurul’ Aina]]>;
<![CDATA[Salma Liska]]>
<![CDATA[ Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtkl.v4i1.129
<![CDATA[Carbon steel in industrial equipment which direct contact with the environment will eventually be corroded. The rate of corrosion could be slowed by organic inhibitors of tannin compounds contained from acacia trees. Tannins were obtained from the extraction process using methanol and ethanol. The aims of this research were to determine the best solvent in the extraction process of acacia bark based on the largest tannin content and to study the effect of tannin as a corrosion inhibitor on carbon steel in the corrosive media through weight reduction methods. The extraction process used maceration at room temperature for two hours with a solid:solvent ratio of 1:10. The solvents were ethanol and methanol. The extract was evaporated in a rotary evaporator at 50 oC, 100 mbar became a paste form. Bark extract was added as an inhibitor in 0.5 M H2SO4 corrosive media; HCl 0.5 M; sea water, and tap water with the addition of inhibitor concentrations of 4%, 6% and 8% (w /v). Immersion was carried out for 12, 24, 36, 48, 60 and 72 hours. Methanol was a better solvent than ethanol with a yield of 4.57% and tannin concentration of 2.768 ppm. Tannin in acacia bark extract is suitable to be used as a corrosion inhibitor in acidic media such as H2SO4 0.5 M and 0.5 M HCl with the highest efficiency gains are 81.20% and 53.06%, respectively.]]>
<![CDATA[Transesterifikasi In Situ Minyak Biji Pepaya Menjadi Metil Ester dengan Co-Solvent N-Heksana Menggunakan Microwave ]]>
<![CDATA[Daryono, Elvianto Dwi]]>;
<![CDATA[Sintoyo, Adi]]>;
<![CDATA[Gunawan, Rendi Chandra]]>
<![CDATA[ Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtkl.v4i1.148
<![CDATA[In the dry weight of papaya seed oil contains up to 30%, so the potential to be used as raw material for biodiesel. Transesterification in situ is a simple step to produce biodiesel that is by eliminating extraction process and refining of oil so it can save on production costs and give satisfactory results. The reaction of one phase can be formed by adding a co-solvent to increase the solubility of oils. N-hexane is a co-solvent that is best because it is inexpensive, non-reactive and low boiling point (68°C) so that it can be separated by co-distillation with methanol. Microwave can propagate passed through the liquid so that the heating process will take place more effectively and the process of making biodiesel can be made shorter. In this study the variation of power used is 30%, 50% and 70% of 399 watts and the reaction time is 2,4,6,8 and 10 minutes. Results were analyzed by GC (Gas Chromatography). The optimum yield was 89.25% at 70% power and reaction time 8 minutes. The optimum yield has a density of 0.86 g / cm 3 and has an acid number of 0.28 mg KOH/g sample. These results have met the SNI 7182:2015.]]>
<![CDATA[Pengaruh Suhu Sintesis Katalis Partikel Ceria Zirconia terhadap Efektivitas Proses Delignifikasi ]]>
<![CDATA[Okky Putri Prastuti]]>;
<![CDATA[Fandi Angga Prasetya]]>;
<![CDATA[Ufafa Anggarini]]>;
<![CDATA[Rifqi Putera Herwoto]]>;
<![CDATA[Hesty Rahayu]]>
<![CDATA[ Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtkl.v4i1.131
<![CDATA[Biomass is organic material produced through photosynthetic processes. The presence of lignin on the cell wall will inhibit cellulose to be converted into products. Delignification will open the lignocellulose structure to make cellulose more accessible. The delignification process can be done by adding the Ceria-Zirconia catalyst to the biomass sample. The aim of this research is to determine the effect of synthesis temperature on Ceria Zirconia synthesis and to investigate the ability of Ceria Zirconia as a biomass delignification catalyst. Ceria- Zirconia Catalyst can be produced through the batch hydrothermal method. The precursors used were chemical solutions in the form of Ce(NO3)3.6H2O and ZrO(NO3)2.2H2O 0.06 M with a ratio of 1: 1, the synthesis temperature variables used were of 180oC, 200oC dan 220oC. Ceria Zirconia Catalysts will then be analyzed for their abilities through a 10 and 20 minute delignification process. The results showed that the increasing synthesis temperature will increase the ability of Ceria-Zirconia catalyst in the delignification process.]]>
<![CDATA[Pengaruh Waktu Terhadap Temperatur Aktivasi dari Kulit Pisang (Musa paradisiaca L.) dalam Pembuatan Katalis ]]>
<![CDATA[Yuni Kurniati]]>;
<![CDATA[Eka Lutfi Septiani]]>;
<![CDATA[Okky Putri Prastuti]]>;
<![CDATA[Victor Purnomo]]>;
<![CDATA[Sri Sugmah Nur Dewi]]>;
<![CDATA[Imam Mahmuddin]]>
<![CDATA[ Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtkl.v4i1.134
<![CDATA[Banana peels include agricultural waste that contains lignocellulosic components (holocellulose and lignin) and carbohydrate content which is quite high. Banana peel is quite potential to be used as a substrate in producing catalysts. Acid catalyst is one type of catalyst that plays an important role in chemical processes. Chemical activation is the process of breaking the carbon chains of organic compounds by using chemicals. In this way, the activation process is carried out using chemicals (activators) as activating agents. This study aims to study the effect of activation temperature temrhadao from the optimum mass ratio of carbon-KOH in the synthesis process of banana skin charcoal based catalysts so as to produce a catalyst with the most optimal characteristics, and calcination temperature as a physical chemical process in the synthesis of banana skin charcoal based catalysts. The method of making the catalyst is done by calcination to decompose the carbon source into carbon so that the composite is formed according to the temperature that has been varied. After forming carbon-KOH composite, then sulfonation is carried out using concentrated sulfuric acid according to the specified temperature. Activation with KOH at activation temperatures of 300°C, 350°C and 400°C. In this research, the activation process can run optimally at temperatures of 300 °C, 350 °C, and 400 °C which are characterized by the presence of white smoke that has not come out anymore because carbon has reacted with KOH.]]>
<![CDATA[Aplikasi Chitosan Modified Carboxymethyl sebagai Coating Agent dalam Perbaikan Mutu Kertas ]]>
<![CDATA[Hadiantoro, Sigit]]>;
<![CDATA[Udjiana, S. Sigit]]>;
<![CDATA[Azkiya, Noor Isnaini]]>
<![CDATA[ Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtkl.v4i1.126
<![CDATA[This study aimed to determine the effect of coating paper with Modified Carboxymethyl Chitosan (Cs-Mcm) to improve the quality of the paper, including paper grammage, tensile strength of paper, torn paper and a strong degree of fineness of the paper. The study was conducted by superimposing the Cs-Mcm as a coating agent on a paper-based pulp rice straw pulp waste paper and pulp mixture (rice straw and waste paper) with various concentration of acetic acid solvent 2%, 3%, 5% and 7%. The analysis showed the concentration of acetic acid solvent effect on the quality of recycled paper. Coating with Cs-Mcm in this study can improve the quality of recycled paper.]]>
<![CDATA[Biogas Production from Corn Stover by Solid-State Anaerobic Co-digestion of Food Waste ]]>
<![CDATA[Lukhi Mulia Shitophyta]]>;
<![CDATA[Gita Indah Budiarti]]>;
<![CDATA[Yusuf Eko Nugroho]]>;
<![CDATA[Dika Fajariyanto]]>
<![CDATA[ Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtkl.v4i1.125
<![CDATA[Biogas has become an alternative fuel to reduce the lack of fossil fuel. Biogas can be produced from organic wastes such as corn stover. Corn stover is a typical lignocellulosic biomass and contains a total solid (TS) content higher of 15%. Biogas production was conducted by solid-state anaerobic digestion with addition co-digestion of food waste. Co-digestion is useful to help the digestion of corn stover. The purposes of this study were to investigate the effect of the percentage of food waste, volatile solid (VS) reduction, and kinetic model on biogas production from corn stover. Results showed that food waste had a significant effect on biogas yield (p < 0.05). The highest biogas yield of 584.49 mL g-1 VS-1 and the highest VS reduction of 40% was obtained at food waste of 20%. The kinetic model of biogas production from corn stover and food waste followed the first-order kinetic model.]]>
<![CDATA[Sintesis Hidrogel Pektin – Gelatin dengan Penambahan Ekstrak Kulit Buah Naga Sebagai Kandidat Pembalut Luka Bakar ]]>
<![CDATA[Fadhil Muhammad Tarmidzi]]>;
<![CDATA[Inggit Kresna Maharsih]]>;
<![CDATA[Tina Raihatul Jannah]]>;
<![CDATA[Cici Sari Wahyuni]]>
<![CDATA[ Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtkl.v4i1.128
<![CDATA[Wound dressing technique currently applies modern wound care methods by maintaining the environmental isolation of the wound in a closed and moist state. There are several types of wound dressing that have been developed, one of them is hydrogel. Hydrogel is sheet-shaped wound dressings which have the ability to absorb exudate and have good stability acidic pH that can be used for the treatment of burns. In this study, hydrogel were made using natural polymers such as pectin and gelatin. The two polymers were combined using crosslinking method with the addition of citric acid as a crosslinking agent. The addition of citric acid has affect on the characteristics of the hydrogel material produced, therefore the right amount is needed to obtain a hydrogel with good mechanical properties. Hydrogel also added by an active substance in the form of flavonoids from dragon fruit peel extract that can be used as a wound dressing to cure burns. This study resulting hydrogel with a concentration of 4% citric acid (Hydrogel CA 4%) produced highest value of swelling, tensile strength, and elongation are 890%, 0.05 Mpa, and 200%, repectively. The mechanical properties of Hydrogel CA 4% was proved by FTIR test that had been carried out, namely the presence of C=O carbonyl group as a result of the esterification reaction that occurred between the polymers and citric acid in the absorption area of 1733.9 cm-1.]]>
<![CDATA[Aplikasi Response Surface Methodology pada Optimasi Penambahan Blast Furnace Slag Terhadap Waktu Pengikatan dan Kuat Tekan Semen ]]>
<![CDATA[Hardjono Hardjono]]>;
<![CDATA[Cucuk Evi Lusiani]]>;
<![CDATA[Agung Ari Wibowo]]>;
<![CDATA[Mochammad Agung Indra Iswara]]>
<![CDATA[ Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtkl.v4i1.150
<![CDATA[The production of clinker consumes high energy and causes high production cost of cement industry. It can be reduced by adding blast furnace slag as a mixture in cement production. The blast furnace slag - clinker mixture can produce cement with setting time and compressive strength according to SNI. The effect of the addition of blast furnace slag as a clinker mixture to the setting time and compressive strength of cement can be optimized by response surface methodology (RSM) using Central Composite Design (CCD). Optimization by using RSM aims to determine the optimum condition of the blast furnace slag – clinker mixture to the initial setting time, final setting time, and compressive strength. ANOVA test results and response surface analysis show that the addition of blast furnace slag into the cement mixture has a significant influence on the initial setting time, final setting time, and compressive strength. The addition of 5% blast furnace slag with 92.5% clinker in the mixture of clinker and gypsum is the optimum condition which gives a significant effect on the response variable.]]>
<![CDATA[Engineering and Economic Evaluation of Production of Fe3O4 Nanoparticles ]]>
<![CDATA[Asha E. Harman]]>;
<![CDATA[Asep Bayu Dani Nandiyanto]]>
<![CDATA[ Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtkl.v4i1.133
<![CDATA[This paper aims to evaluate the economic feasibility of Fe 3 O 4 nanoparticle production from a laboratory scale to an industrial scale feasibility. The evaluation was conducted using 2 models of feasibility studies, namely: technical analysis and economic evaluation. Technical analysis provides information on the potential for large-scale production and the results of this process can be applied using commercially available and inexpensive equipment. Economic evaluation is based on a comparison of the Cumulative Net Present Value graph in an ideal condition and the graph when parameters changing are made (such as changes in the dollar exchange rate, the quantity of sales products, and the value of employee salaries). From the evaluation results, all parameter changes give a positive value indicating that the project is feasible to run commercially and on a large scale. This is because the evaluation results provide a stable index of profit for some changes in parameter values. This study shows that Fe 3 O 4 fabrication can provide promising profits in developing countries and can attract foreign investors to work together on Fe 3 O 4 fabrication.]]>
