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Jurnal Teknik Kimia USU

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Published by TALENTA PUBLISHER

ISSN : - EISSN : 23374888 DOI : https://doi.org/10.32734/jtk.v11i1

Core Subject : Science, Social, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

Jurnal Teknik Kimia USU merupakan jurnal elektronik yang mempublikasikan karya ilmiah di bidang teknik kimia yang diterbitkan oleh Departemen Teknik Kimia, Fakultas Teknik, Universitas Sumatera Utara. Jurnal ini tidak terbatas pada mahasiswa dan dosen Universitas Sumatera Utara, tetapi terbuka untuk mahasiswa, dosen dan peneliti dari instansi lain.

Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)

Articles 337 Documents

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MODEL KINETIKA EKSTRAKSI FLAVONOID DARI BAYAM MERAH (Alternanthera amoena voss) Iriany; Irsa Septiawan; Salwa Jody Gustia
Jurnal Teknik Kimia USU Vol. 6 No. 4 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Red spinach (Alternanthera amoena voss) contains vitamins, protein, and flavonoids. Flavonoid is polyphenol compounds having properties as a free radical catcher.The purpose of this research is to obtain the kinetic rate of flavonoid mass transfer from red spinach.Extraction is one of the way to take flavonoids contained in solids with the assist of solvents. Mass transfer in liquid solid extraction occurs by diffusion. The determination of mass transfer coefficient (KC) is to conduct the rate of mass transfer of flavonoids from solids. In this study, the effect of temperature on the extraction of flavonoids from red spinach with water solvent is observed. The temperatures extraction in this research are of 50°C, 60°C, and 70°C respectively. Determinationof total flavonoid, mass transfer coefficient, and antioxidant activity carried out using FT-IR Spectrophotometry and UV-VIS Spectrophotometry. This study concluded that the increase in extraction time and temperature will increase the total content of flavonoids and extract rendement.Mass transfer coefficient equation in this study is K = 3078645 . Antioxidants in red spinach are included in the group of very strong antioxidants.

PENGARUH PENAMBAHAN TRACE METAL (MOLYBDENUM & SELENIUM) TERHADAP PEMBUATAN BIOGAS DARI SAMPAH ORGANIK DAN KOTORAN SAPI Fatimah; Grace Angelin
Jurnal Teknik Kimia USU Vol. 6 No. 4 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Trace metal are essential for the enzyme cofactors in methane formation, but its availability of natural is not enough so that the necessary additional trace metal. The purpose of this study is to determine the effect of addition Molybdenum (Mo) and Selenium (Se) as trace metal on the quality and quantity of biogas in anaerobic digesters. The study was carried out by mixing vegetables wastes, aquadest and cow manure that have been in a blender and then have been fermented for 30 days in variety of addition of trace metal Mo 10 mg/L, Se 10 mg/L and a mixture of Mo + Se 10 mg/L in an reactor batch of 4 L capacity. Operation in digesters, pH was maintained in range (6.5 – 8) and at temperature 25 – 30 oC. This research parameters that observed were volume biogas, pH, temperature, TS and VS. The highest of volume cumulative biogasin this experiment 630 ml are formed Mo + Se, with degradation average TS 26.69 % and VS 17.18 %.

MASERASI ALKALI DARI BATANG PISANG (Musa paradisiaca) MENGGUNAKAN PELARUT AQUADEST Lilis Sukeksi; Patima Valentina Haloho; Masniar Sirait
Jurnal Teknik Kimia USU Vol. 6 No. 4 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The purpose of this research is to determine the time of alkali absorption from banana stem in semibatch and batch. In this study maceration maseration is a leaching process used to obtain the time required for solvent to absorb alkali in banana stem ash. While the batch system maseration is a leaching process used to obtain the time required for the solvent to reach saturation point (stop absorbing). Data collection techniques in this research are: sample preparation and drying of banana stem, banana stalking process banana stem, brazing ash process of banana stem in semibatch and batch, and determination of alkaline content by titration method. From result of research can be concluded that banana stem potentially serve as source of alkali because potassium (K2O) and sodium (Na2O) content in banana ash sticks respectively 36,19% and 13,99%. Water content and yield of banana ash sticks were 78.6% and 17.7%, respectively. The time for the semibatch system is obtained in 72 hours, while for the batch system was obtained in 12 days. Normalities of alkali extracts in semibatch and batch maceration still increased. Where in the ratio of banana stem ash/solvent is 1 gram / 25 ml; 2 gram / 25 ml; 3 gram / 25 ml; and 4 gram / 25 ml respectively had a normality value that still increased from 0.219 N to 0.567 N; 0.407 N to 0.891 N; 0.578 N to 1,315 N; and 0.819 N to 1,345 N. The highest permeated alkali yield was obtained ratio (banana stem ash/ solvent) 1 gram / 25 ml of 52.37%.

SINTESIS PALMITOIL DAN LAUROIL ETANOLAMIDA MENGGUNAKAN PELARUT CAMPURAN : PENGARUH TEMPERATUR DAN WAKTU REAKSI Muhammad Ashari; Nur Annisa; Zuhrina Masyithah
Jurnal Teknik Kimia USU Vol. 6 No. 4 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Surfactant is a molecule which has hydrophilic group and a lipophilic group which can unify a mixture consisting of water and oil. Alkanolamide is a type of widely used nonionic surfactant for various purposes. In this study, we observed the effect of temperature and reaction time on the synthesis of palmitoyl ethanolamide surfactant from palmitic acid and lauroyl ethanolamide from lauric acid with zirconium (IV) chloride as catalyst in mixed solvent. This research was conducted using amidation reaction at temperature variation of 55oC, 65oC, 75oC, 85oC and 95oC, reaction time variation of 1 hour, 2 hours, 3 hours, 4 hours, and 5 hours, mole substrate ratio at 1:10, solvent ratio at 2: 1 (v / b), catalyst concentration 5% (w/w), and stirring rate at 250 rpm. Then the product was analyzed by FT-IR spectrophotometry. Based on this research, the optimum condition to synthesis palmitoyl ethanolamide surfactant was obtained at 55 oC and temperature 65 oC to synthesis lauroyl ethanolamide surfactant at reaction time of 3 hours for both of them.

PEMBUATAN ADSORBEN DARI KULIT BATANG JAMBU BIJI (Psidium guajava L.) UNTUK MENJERAP LOGAM TEMBAGA (Cu) DAN NIKEL (Ni) PADA LIMBAH CAIR INDUSTRI PELAPISAN LOGAM Setiaty Pandia; Muhammad Ferdiyansyah; Febri Maihendra
Jurnal Teknik Kimia USU Vol. 6 No. 4 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This research aims to study the effect of adsorption time, adsorption temperature, pH, and the ratio of raw materials with nitric acid in the manufacture of bark guava adsorbent in reducing the metals content of copper (Cu) and nickel (Ni) in the metal wastewater industry. Materials used include, among others, industrial metal coating wastes, guava stem bark, nitric acid, and aquadest. Initially the bark of guava stalk was cleansed and mashed 70-80 size, then activated with 4 N nitric acid (HNO3) solution with a variation in the ratio of bark the guava : nitric acid is 1:1; 1:2; and 1;3 g/mL were heated at 80oC for 120 minutes. The adsorbent is then dried in the oven at 110oC for 120 minutes. Adsorbent with the highest iodine number analysis results was used in the adsorption process of Cu (II) Ni(II) metals, wherein the adsorbent massused was 2 grams in 150 ml of metallic industry liquid waste, 70 rpm stirrer speed, variation of adsorption times are 60, 90, and 120 minutes, variation of adsorption temperatures are 35oC, 45oC, and 55oC, and variation of adsorption pH are 2, 7, and 12. The result showed that the ratio of bark of guava stem: the best nitric acid was 1: 3 g/mL with iodine number of 313,020 mg/g. Based on Liquid Waste Quality Standard for Industrial Activity (KepMen LH 51/1995), the copper and nickel content in liquid waste should not exceed 3 mg/L and 3 mg/L for metal coating industry. From the results of adsorption process that has been done, got the optimum condition of adsorption of copper metal that is at 60 minutes, temperature 35oC, and pH 7 and obtained the efficiency of adsorption equal to 69,1540%, and nickel metal that is at 60 minutes, temperature 35oC, and pH 7and obtained the efficiency of adsorption equal to 75,1700%, where the result of adsorption the Cu2+ and Ni2+ metal ions are 2,8077 mg/L and 4,1100 mg/L.

KARAKTERISTIK KARBON AKTIF DARI PEMANFAATAN LIMBAH TANAMAN KELAPA SAWIT DENGAN PENAMBAHAN AKTIVATOR NATRIUM KARBONAT (Na2CO3) DAN NATRIUM KLORIDA (NaCl) Gewa Handika; Seri Maulina; Vidyanova Anggun Mentari
Jurnal Teknik Kimia USU Vol. 6 No. 4 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Oil palm tree can produce 22 oil palm frond / year, the average weight of frond per rod reaches 2.2 kg, so that each hectare can produce fresh frond about 9 tons / year or equivalent to 1.64 tons / year of dry matter. Activated carbon can be used as a good absorbent agent for gas purification process and removal of organic pollutants from water, such as in liquid waste. The objective of this paper is to know the different characteristics of activated carbon from oil palm frond (elaeis guineensis jacq) as raw material with variation of activator sodium carbonate (Na2CO3) and sodium chloride (NaCl). The activator concentration used is 10% each with an activation temperature of 600 ° C. The quality of activated carbons was analyzed by surface active carbon morphology and FTIR spectra analysis on activated carbon. The result of identification with FTIR spectrophotometer showed that the activated carbon in this study contained the functional groups of O-H, C = O, C = C, C-C, and C-H.

PEMBUATAN KARBON AKTIF DARI KULIT SALAK (Salacca Zalacca) DENGAN PROSES FISIKA MENGGUNAKAN UAP DENGAN PEMANAS MICROWAVE Indah Sari; Uchi Inda Purnamasari; M. Turmuzi Lubis
Jurnal Teknik Kimia USU Vol. 6 No. 4 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This study aimed to determine the best adsorption capacity, compounds contained in activated carbon and burn off that produced. In this study, activated carbon have been prepared from the bark of Salacca zalacca by physically activating using a microwave. The 70 gram bark of Salacca zalaccawas pyrolised in a furnace with flowing gas N2 with temperature 500 oC for 120 minutes followed by microwave activation at 2450 MHz with power 600 W, 800 W and 1000 W for 20 minutes, 40 minutes and 60 minutes. The results showed the best burn off on microwave power 1000 W with 60 minutes activation time of 90,25%. The best activated carbon adsorption capacity at 800 W microwave power for 20 minutes is 19,96 mg/g. The best allowanced percentage at 800 W microwave power with 20 minutes activation time is 99,82%. Characterization of Fourier Transform Infra-Red (FITR) showed the presence of C=O (carbonyl) bonds indicating the presence of carbon-active substances. After pyrolysis forms a C≡C (Alkuna) bond which indicated more carbon was produced. This is supported by the characterization of Scanning Electron Microscope (SEM) and Energy Dispersive X-Ray Spectroscopy (EDS) showing the surface morphology of rough and irregular activated carbon and the amount of carbon and oxide content on activated carbon of 44,44% and 28,54% sequentially.

EKSTRAKSI MINYAK ATSIRI BUNGA MELATI DENGAN MENGGUNAKAN PELARUT ISOPROPIL ETER : PENGARUH WAKTU, TEMPERATUR, DAN RASIO MASSA BUNGA MELATI DENGAN VOLUME PELARUT Febrina Iskandar; Michael Dillo Rizki Ginting; Iriany; Okta Bani
Jurnal Teknik Kimia USU Vol. 8 No. 1 (2019): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Jasmine flower is one of the high value commodities. One of the applications of jasmine flower is jasmine essential oil. Jasmine essential oil is often used to produce high quality parfume. Extraction is one of the methods for extracting jasmine essential oil, usually by the help of solvent. In this study, the effect of extraction time, extraction temperature, and solvent to jasmine flower ratio on jasmine oil extraction was studied. The extraction was carried out at 30oC, 35oC, and 40oC for 2 hours, 3 hours, 4 hours, and 5 hours by using isopropyl ether. The ratio of jasmine flower to isopropyl ether were 1:3; 1:4; and 1:5 (m/v). The resulting jasmine oil was analyzed by GC-MS and its quality was assessed according to SNI 06-2385-2006 which include colour test, refractive index analysis, acid number analysis, and ester number analysis. This experiment showed that increasing of extraction time, extraction temperature, and volume of solvent lead to increase of absolute yield of jasmine essential oil. The highest jasmine oil yield was obtained at 10.63 %. The jasmine oil contained 45.34% benzyl acetate and had yellow color. Its refractive index, acid number, and ester number were 1.485, 26.228 mg KOH/gram jasmine essential oil, and 159.885 mg KOH/gram jasmine essential oil.

PEMBUATAN KOMPOS DARI CAMPURAN 60% BERAT TANDAN KOSONG KELAPA SAWIT DAN 40% BERAT AZOLLA MICROPHYLLA DENGAN BANTUAN PUPUK CAIR ORGANIK AKTIF
Jurnal Teknik Kimia USU Vol. 8 No. 1 (2019): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The process of composting empty fruit bunches and Azolla microphylla by asistance active organic liquid fertilizer was an alternative in the utilization of solid waste produced from the palm oil mill. This research was to produce good quality compost from a mixture of 60%:40% weight empty fruit bunches and azolla microphylla with asistance active organic liquid fertilizer. The composting process is done by entering empty fruit bunches and Azolla microphylla on the composter and added active organic liquid fertilizer to achieve the moisture content value of 55%-65%. During composting, the moisture content was kept on the optimum condition by adding the active organic liquid fertilizer. The parameters analyzed were temperature, moisture content, pH, water holding capacity, electrical conductivity, and C-N. The result showed that compost can be produced within ± 30 days with characteristic of pH 8.8; Moisture Content 59,92%, Water Holding Capacity 86%, C 27.24%, N 1.53

PENGARUH SUHU REAKSI, KECEPATAN PENGADUKAN DAN WAKTU REAKSI PADA PEMBUATAN SABUN PADAT DARI MINYAK KELAPA (Cocos nucifera L.) Rosdanelli Hasibuan; Fransiska Adventi; Rahmad Parsaulian Rtg
Jurnal Teknik Kimia USU Vol. 8 No. 1 (2019): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Soap is a cleanser made by chemical reactions between sodium hydroxide or potassium hydroxide with fatty acids from vegetable oils or animal fats. Soaps can be made by several methods, namely saponification and neutralization methods, in this study carried out by saponification method. In the saponification method there are several problems namely operating conditions which include reaction temperature, stirring speed and stirring time. Therefore, need to do research to determine the best conditions of saponification reaction, namely reaction speed, operating temperature and reaction time using an impeller type multiple pitch blade turbine with research variables reaction temperature 60 oC, 70 oC, and 80 oC, stirring speed 300 rpm,400 rpm and 500 rpm and reaction time of 45minutes, 60 minutes, and 75 minutes. Saponification reaction is carried out by heating coconut oil and inserting 30% NaOH slowly and then stirring with a multiple pitch blade stirrer. The product will be analyzed by testing alkaline levels, moisture content and pH of the soap. The best operating conditions obtained from this study were at a temperature of 70 oC, reaction time of 60 minutes, stirring speed of 400 rpm with a pH value of 9.4 and an alkaline level of 0.073 and a moisture content of 9.8.

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