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Jurnal Teknik Kimia USU

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Published by Universitas Sumatera Utara

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Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering

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Articles 9 Documents

Search results for , issue "Vol 3, No 3 (2014)" : 9 Documents clear

STUDY OF EICHORNIA CRASSIPES POWDER FROM PANTE RIEK FOR PB2+ ION ADSORPTION Mirna Rahmah Lubis
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
Publisher : Universitas Sumatera Utara

Adsorption capacity was calculated in Eichornia crassipes adsorbent. In several areas of Aceh province such as Meulaboh, Takengon, and Tamiang, people extirpate Eichornia crassipes because it is considered disturbing water flow. Therefore, this research tries to investigate the utilization of Eichornia crassipes so that it could be used as bioadsorbent in order to reduce heavy metal from waste water. The main obejctive of this research is to reduce lead content, and to determine the best condition of lead adsorption in solution by using Eichornia crassipes powder. The analysis is conducted by using Atomic Adsorption Spectrophotometer. Research result indicates that optimum adsorption occurs at solution with pH of 4.4, lead concentration of 40 mg/L, and contact time of 75 minutes. Lead adsorption by Eichornia crassipes biomass follows adsorption isotherm of Langmuir and pseudo-second order with capacity of adsorption (am) of 27,78 mg/g, and adsorption constant (K) is 12 L/mg.

EKSTRAKSI PIGMEN ANTOSIANIN DARI KULIT RAMBUTAN (NEPHELIUM LAPPACEUM) DENGAN PELARUT ETANOL Laura Olivia Siahaan, Elvi Rasida Florentina Hutapea, Rondang Tambun
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
Publisher : Universitas Sumatera Utara

Rambutan fruit (Nephelium lappaceum Linn) is a kind of tropical fruits which come from Malaysia and Indonesia. Their red coloured rinds have not used yet effectively and that coloured may be due to anthocyanin that can be used for natural colours. The purpose of this research is to know the optimal condition of the extraction anthocyanin, they are particle size of rambutan rinds, temperature and extraction time. Analysis of the anthocyanin use spectrophotometer UV-Vis to detect the wavelength and the absorbance of the anthocyanin. The best conditions are rambutan rind milled by blender and extraction time for 8 hours at 70 0 of temperature. These conditions give the highest color intensity having 1,0086 of maximal absorbancy, 120,1601 mg/mL of anthocyanin concentration and 0,6008 % of rendement.

PENGARUH UKURAN PARTIKEL DAN KOMPOSISI TERHADAP SIFAT KEKUATAN BENTUR KOMPOSIT EPOKSI BERPENGISI SERAT DAUN NANAS Syahrinal Anggi Daulay, Fachry Wirathama, Halimatuddahliana
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
Publisher : Universitas Sumatera Utara

This research was aimed to investigate the effect of pineapple leafs particle size and pineapple leaf fiber composition of the impact strength of epoxy composites filled with pineapple leaf fibers. The composites were made by hand lay up method by mixing epoxy and pineapple leaf fiber with particle size variation of 30 mesh, 40 mesh, 70 mesh, 100 mesh, and volume fraction ratio between filler and matrix 5/95, 10/90, 15/85 (v/v). Mechanical properties wich tested was impact strength and supported with SEM analysis. The results obtained show that the addition pineapple leaf fiber as filler in epoxy composites generally increase the impact strength of the composites, with best performance shown by 100 mesh particle size variation with ratio 90/10 (v/v) which from SEM analysis show that this variation having better filler distribution.

JTK USU Journal Management
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
Publisher : Universitas Sumatera Utara

JTK USU

STUDI SOLIDIFIKASI POLIETERSULFON DALAM PELARUT N-METIL-2-PIRROLIDON DENGAN ADITIV POLYVINYL PYRROLIDONE DAN 2-(METHACRYLOYLOXY) ETHYL PHOSPHORYL CHLOLINE Nasrul Arahman, Sri Aprilia, Teuku Maimun
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
Publisher : Universitas Sumatera Utara

In membrane preparation process via phase inversion method, the morphology of fabricated membranes are determined by composition and concentration of polymer, solvent, and non-solvent. The basic knowledge of the appropriate composition of those components are needed by cloud point experiment. In this work, the study on cloud point experiment have been done to investigate the solidification process of polymer system of polyethersulfone (PES) and 2-(methacryloyloxy) ethyl phosphoryl chloline (MPC) in N-methyl-2-pirrolidon (NMP) via phase inversion technique. Hydrofilik polymer MPC were used as a membrane modifying agent (MMA) in order to modify the surface property of fabricated membrane. In sum, addition of PVP and MPC into polymer solution brought about reducing amount of non-solvent necessary to obtain the cloud point of solution.

PENGARUH RASIO EPOKSI/AMPAS TEBU DAN PERLAKUAN ALKALI PADA AMPAS TEBU TERHADAP KEKUATAN BENTUR KOMPOSIT PARTIKEL EPOKSI BERPENGISI SERAT AMPAS TEBU Akhmad Nadji Shabiri, Rizky Salaam Ritonga, M. Hendra S. Ginting
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
Publisher : Universitas Sumatera Utara

This study was aimed to determine the effect of alkali treatment and fiber composition on the impact strength properties of epoxy composites filled with bagasse fiber. Composites are made by hand lay-up method by mixing epoxy and bagasse fiber with variation of volume ratio between matrix and filler are 100/0, 70/30, 60/40, and 50/50 (v / v) and the concentration of NaOH slolution in the alkali treatment are 0% , 1%, 2%, and 3%. Mechanical propertie tested was impact strengthand analized by SEM analysis. The results obtained from this study was the maximum impact strength value obtained of the composite was on the composition 70:30 with 2% NaOH concentration was 8,005 kJ/m2.

PENGARUH PENAMBAHAN AMMONIUM SULFAT (NH4)2SO4 DAN WAKTU PERENDAMAN BUFFER FOSFAT TERHADAP PEROLEHAN CRUDE PAPAIN DARI DAUN PEPAYA (CARICA PAPAYA, L) Mitha Alviyulita, Pinta Rizki Mala Hasibuan, Farida Hanum
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
Publisher : Universitas Sumatera Utara

Papaya leaves is a plant that rich in benefits. Papaya leaves contains papain enzyme which is a protease enzyme that very helpful for the industry. This study aims to determine the effect of the saturation level of ammonium sulphate (NH4)2SO4 and immersion time with phosphate buffer to get yield of protease from crude papaya. In this study varied immersion time with phosphate buffer is 0, 12, 24, and 36 hours and the saturation level of ammonium sulphate (NH4)2SO4 is 40, 50, 60, 70, 80, and 90 %. Analysis of protease activity was performed using UV spectrophotometer to measure the wavelength and absorbance values. The highest value of the protease activation (132,98% unit/ml) was obtained during 36 h of immersion time in phosphate buffer with 60% concentration of ammonium sulphate (NH4)2SO4. The results found on 36 h of immersion time in 90% of ammonium sulphate concentration were the highest for rendement and water content value of 37,62 and 65,70%, respectively.

PENGARUH PENAMBAHAN NATRIUM KLORIDA (NaCl) DAN WAKTU PERENDAMAN BUFFER FOSFAT TERHADAP PEROLEHAN CRUDE PAPAIN DARI DAUN PEPAYA (CARICA PAPAYA, L.) Pinta Rizki Mala Hasibuan, Mitha Alviyulita, Farida Hanum
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
Publisher : Universitas Sumatera Utara

Papaya (Carica papaya L.) is one of the fruits of commodities internationally, either in the form of fresh fruit or as processed products. The leaves are green still not fully utilized. Papaya leaves contains papain enzyme which is a protease enzyme that very helpful for the industry. Papain is a protease enzyme contained in papaya latex, whether in fruit, stems and leaves, as an enzyme capable of solving the protein molecules, current papain into products that are beneficial to human life, either at home or industrial ladder. This study aims to determine the effect of the degree of saturation of sodium chloride and phosphate buffer to yield soaking rough papaya protease. This study varying the time of immersion phosphate buffer and saturation levels of sodium chloride. Analysis of protease activity was performed using UV-Vis spectrophotometer to measure the wavelength and absorbance values. The best research results obtained at 12 h immersion phosphate buffer with a concentration of sodium chloride 60% is 272.8222 unit / ml. In the analysis of the rendemen obtained by the best condition at the time of immersion phosphate buffer for 36 hours at a concentration of 90% is 43,5152%. In the analysis of moisture content obtained the best condition at the time of immersion of 36 hours at a concentration of 90% is 37.4266%.

PENGARUH WAKTU FERMENTASI TERHADAP PERSENTASE PENYISIHAN CHEMICAL OXYGEN DEMAND (COD) CAMPURAN LIMBAH CAIR INDUSTRI TAPIOKA DAN AIR Umayi Belladiana, Wan Rizki Ansari, Setiaty Pandia
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
Publisher : Universitas Sumatera Utara

Study about the effect of fermentation time on the percentage removal of chemical oxygen demand (COD) a mixture of tapioca liquid industrial waste and water that aims to determine the effect of water quality and quantity of bio-gas generated from tapioca industrial wastewater combined with water. The research was conducted by combining tapioca industrial wastewater with water on several compositions, namely 100: 0; 85:15; 65:35; 50:50; 35:65; 15:85 (v / v) with cow dung starter in the batch anaerobic digester systems for 24 days with a neutral pH. The optimum percentage of allowance for COD at the ratio of tapioca liquid industrial waste and water at 15:85 with a value of 42.14% where the value of COD on day 0 was 1723 mg / L after day 24 was 997 mg / L .

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