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All Journal Jurnal Teknik Kimia USU Ethos Riau Journal of Empowerment Journal of Saintech Transfer Jurnal Teknik Kimia USU

Fachry Wirathama, Syahrinal Anggi Daulay Halimatuddahliana

Universitas Sumatera Utara

Author-ID : 273261

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences Other

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DAYA SERAP AIR DAN KANDUNGAN SERAT (FIBER CONTENT) KOMPOSIT POLIESTER TIDAK JENUH (UNSATURATED POLYESTER) BERPENGISI SERAT TANDAN KOSONG SAWIT DAN SELULOSA Michael; Elmer Surya; Halimatuddahliana
Jurnal Teknik Kimia USU Vol. 2 No. 3 (2013): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This study was aimed to investigate the effect of empty fruit bunch palm oil and cellulose content as filler in water absorption and fibre volume fraction of the unsaturated polyester composites. The composites were made by hand-lay up method by mixing unsaturated polyester with the composition of each fillers (empty fruit bunch palm oil and cellulose) of 5,10,15,20 wt%. The parameter which was carried on the prepared samples was water absorption for each sample every 24 hours until the composites have constant absorption. It was found that the addition of fillers to the matrix caused the water absorption of composites increased at each of composition of fillers (empty fruit bunch palm oil and cellulose) and the fibre volume fraction increased as the filler content increase.

PENGARUH UKURAN SERBUK TEMPURUNG KELAPA SEBAGAI PENGISI KOMPOSIT POLIESTER TAK JENUH TERHADAP SIFAT MEKANIK DAN PENYERAPAN AIR Falma Irawati Sijabat; Jenmorisdo Saragih; Halimatuddahliana
Jurnal Teknik Kimia USU Vol. 2 No. 4 (2013): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Coconut Shell Powder (CSP) was derived from industrial Making Anti-Mosquito can potentially be used as filler in materials composite. The investigation on the utilization of CSP as filler in a polyester matrix has been done with the purpose to obtain the best CSP fillers size in Unsaturated Polyester (UPR) composites in producing the best mechanical properties such as tensile strength, impact strength and water absorption. In this study, UPR was mixed with CSP at the sizes 50 mesh, 70 mesh and 100 mesh with comparison of CSP: Unsaturated Polyester 20:80 (w/w) by using hand lay-up method. The result of mechanical properties showed that, at a ratio of CSP: PE (20:80), the maximum tensile strength obtained is 42.558 MPa with the size of CSP 70 mesh. The test on impact strength was found that the increasing only occured with the size of CSP 100 mesh at 6083.47 J/m2. For absorption test, the highest water absorption occured at the first day, water absorption increased with increasing the amount of filler and the most CSP absorbed water at 70 mesh.

PENGARUH KOMPOSISI DAN UKURAN SERBUK KULIT KERANG DARAH (ANADORA GRANOSA) TERHADAP KEKUATAN TARIK DAN KEKUATAN BENTUR DARI KOMPOSIT EPOKSI-PSSERBUK KULIT KERANG DARAH Addriyanus; Tommy; Halimatuddahliana
Jurnal Teknik Kimia USU Vol. 4 No. 4 (2015): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This study was aimed to investigate the effect of filler content and particle size of cockle-shell powder in tensile strength and impact strength of epoxy-PS composite. Epoxy resin was used as matrix, polyaminoamide as hardener, cockle-shell powder as reinforcement, polystyrene as toughening agent and chloroform as solvent. Filler content was varied from 10-50% and the macro particle was varied from 50-260 mesh. The composite was prepared by using compression moulding, then tensile test and flexural test were done. The results showed that addition of cockle-shell powder improved both tensile strength and impact strength of the composite. Addition of 30% (wt) reinforcement with 200 mesh particle size had given maximum tensile strength of 5,50 MPa and maximum impact strength of 30044,3 J/m2.

PENGARUH PENAMBAHAN MALEAT ANHIDRIDA-GRAFTED-POLIPROPILENA TERHADAP SIFAT KEKUATAN BENTUR DAN PENYERAPAN AIR KOMPOSIT HIBRID PLASTIK BEKAS KEMASAN GELAS BERPENGISI SERBUK SERAT AMPAS TEBU DAN SERBUK SERAT KACA Castiqliana; Silvia; Halimatuddahliana
Jurnal Teknik Kimia USU Vol. 5 No. 1 (2016): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

A study on wasted polypropylene/modified bagasse fiber flour/E-type glass fiber flour with maleic anhydride-g-polypropylene addition hybrid composite was performed and its impact properties and water absorption ability was analyzed. Glass fiber flour and maleic anhydride-g-polypropylene compositions were made constant at 10 wt.% and 2 wt.% respectively, and modified bagasse fiber flour composition was varied from 10-40 wt.%. Surface modification on bagasse flour with 1% sodium hydroxide was also conducted. The composites were prepared in an extruder. The result showed that the maximum impact strength of 46,6 J/cm2 was obtained in addition of modified bagasse fiber flour of 30 wt.%. Impact strength result was also supported by Scanning Electron Microscopy analysis. Water absorption test showed that the increase of modified bagasse fiber flour content resulted to the increase of water absorbance and composites with maleic anhydride-g-polypropylene addition had lower ability to absorb water when compared to composite without maleic anhydride-g-polypropylene addition in the same fillers content.

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): Jurnal Teknik Kimia USU
Publisher : Talenta 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.

STUDI PENGOLAHAN AIR BUANGAN DOMESTIK MENGGUNAKAN DIGESTER ANAEROBIK SATU TAHAP DAN DUA TAHAP Tamaria Kesia Hutasoit; Halimatuddahliana; Amir Husin
Jurnal Teknik Kimia USU Vol. 7 No. 1 (2018): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This research provides an analyzed performance of one and two-stage anaerobic digestion processes. One-stage and two-stage analyzed, individual, from substrate degradation, microbiological, metabolite and biogas production. First, the research initiated by acclimatization in a neutral condition and acid condition. Both one (R1) and two-stage (R2) digesters filled up with domestic wastewater. Into the digesters, it added cow dung as inoculums. pH in R1 maintained at pH 7 for 40 days and pH 5.5 in two-stage anaerobic: first stage (R2-1) for two days. After that, the mixture added with inoculums and then adjusted at pH 7 for the second stage (R2-2) for 38 days. The results showed that the substrate removal efficiency of two-phase is higher one-phase. The highest metabolite production obtained at R2-1: the 2nd day.

PENGOLAHAN LIMBAH CAIR TAHU MENGGUNAKAN BIOREAKTOR ANAEROB SATU TAHAP DAN DUA TAHAP SECARA BATCH Florence T.N. Silalahi; Halimatuddahliana; Amir Husin
Jurnal Teknik Kimia USU Vol. 7 No. 1 (2018): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This research aimed to study the effect of one stage and two stage anaerobic fermentation on the performance of bioreactors in tofu liquid waste treatment. This research started with acclimatization that is adaptation process of microorganism derived from cow dung with tofu liquid waste. Acclimatization is carried out in acid condition (pH 5.5) and in neutral condition (pH 7). This is followed by a batch bioreactor operation for 40 days for one stage anaerobic fermentation (pH 7), while for the first stage of the two stage anaerobic fermentation (pH 5.5) lasted two days and proceeds with the second stage of the two stage anaerobic fermentation (pH 7) lasts 38 days The results obtained were COD removal efficiency of 76.6% for one stage anaerobic and 83.05% for two stage anaerobic. While the VFA concentration in the first stage of the two stage anaerobic increased by 33% of the one-stage anaerobic VFA concentration. One-stage anaerobic biogas yield of 0.24 L/g CODconvertedand 0.27 L/g CODconverted for to two stage anaerobic.

Pengaruh Waktu Kontak dan Massa Adsorben Biji Asam Jawa (Tamarindus indica) dengan Aktivator H3PO4 terhadap Kapasitas Adsorpsi Zat Warna Methylene Blue Andri Rizki; Ervan Syahputra; Setiaty Pandia; Halimatuddahliana
Jurnal Teknik Kimia USU Vol. 8 No. 2 (2019): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This study aims to determine the best adsorption capacity of methylene blue with variations in the mass of the adsorbent, contact time and determine the reaction kinetics and adsorption isotherms of activated carbon. The raw material for activated carbon is tamarind seeds. Tamarind seeds is started to neutral pH and dried in an oven at 130°C to a constant weight, then mashed using a blender and sifted using a 140 mesh sieve. adsorbent 140 mesh was added to 100 ml of methylene blue solution at a stirring speed 150 rpm for each variation of contact time 30 minutes, 60 minutes, 120 minutes and 180 minutes and mass of adsorbent 0,3 gs, 0,4 gs, 0,6 gs and 0,9 gs. The efficiency of the best description of methylene blue is 98,827% with 120 minutes and pH 6 at 0,9 gs of activated carbon. The maximum methylene orange adsorption capacity is 24,670 mg/g at 100 mg/L methylene blue concentration. The model suitable for this study is the second order kinetics and Freundlich adsorption isotherm. The results of the Fourier Transform Infra-Red (FTIR) spectrophotometer on the raw material of Tamarind seeds before activated were obtained by wave number which shows the presence of functional goups C-O, O-H, and C=O goups which form a special goup found on biosorbent, functional goups that appear after activation is a C=C goup which shows an increase in carbon and C-H goups (Alkenes). The results of the Scanning Electron Microscope (SEM) characterization show that the surface morphology of the activated carbon from tamarind seeds has a surface that is open, coarse, and uniform porosity. The pores of biosorbent after activation in vacant soil without impurity.

Karakteristik Zat Warna Antosianin (Adenanthera pavonina L) dari Kulit Biji Saga sebagai Pewarna Alami Menggunakan Metode Soxhletasi Halimatuddahliana; Setiaty Pandia; Fira Ayu Hasmita
Jurnal Teknik Kimia USU Vol. 9 No. 2 (2020): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

In general, dyes that are used in daily life using synthetic dyes. One material that can be used for natural pigment are from saga seeds (Adenanthera pavonina L). Saga (Adenanthera pavonina L) is a tree that has small red seeds which is one source of anthocyanin which can be used as natural dyes, antioxidants and anticarcinogens. In this research aims to find the type of solvent and the best extraction time used for the extraction of anthocyanin from saga seeds. Extraction of anthocyanin from saga seeds used soxhletation method. The variables this research there are the type of solvent (5% citric acid 5% and citric acid 5% (w/v)) and the extraction time (30, 60, 120 minutes). The parameters used are qualitative and quantitative analysis (total yield, total anthocyanin concentration, antioxidant activity, intensity colour and lethal concentration of anthocyanin toxicity in extracts). The result observationaling show that the extraction from saga seeds that have best characteristics in aquadest-citric acid 5% solvent extract yield with extraction time 120 minutes 64.448% (w/w), total anthocyanin with extractions time 120 minutes 100.026 (mg/L), color intensity with extraction time 60 minutes 0.528, antioxidant activity (IC50) 11.622 ppm and toxicity activity with extraction time 60 minutes 63.326 ppm.

Karakteristik Antosianin dari Kulit Buah Nipah (Nypa frutican) sebagai Pewarna Alami dengan Metode Soxhletasi Putri Herfayati; Setiaty Pandia; Halimatuddahliana Nasution
Jurnal Teknik Kimia USU Vol. 9 No. 1 (2020): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Anthocyanin is a natural pigment that gives red colour on Nipah husk (Nypa fructican) extract. Extraction of anthocyanin compounds used the soxhletation method with independent variables were the type of solvent (aquadest and ethanol with citric acid 3% (w/v)) and extraction time (30, 45 and 60 minutes). This study aims to determine the best type of solvent and extraction time used for extraction of anthocyanin from Nipah husk. The parameters in this study include qualitative and quantitative analysis of anthocyanin (extract yield, total anthocyanin concentration, color intensity, antioxidant activity and analysis of toxicity) from Nipah husk extract. The results qualitatively and quantitatively indicate that Nipah husk extract had anthocyanin content with the highest extract yield was obtained using ethanol-citric acid 3% solvent at 60 minutes extraction time of 0.546 gram / gram. The highest total anthocyanin was obtained using ethanol-citric acid 3% solvent at 30 minutes extraction time of 226.36 mg / L. The highest color intensity was obtained using ethanol-citric acid 3% solvent at 30 minutes extraction time of 0.925. The strongest antioxidant activity (IC50) was obtained using 3% aquadest-citric acid solvent at 30 minutes extraction time of 3.569 ppm. The strongest toxicity activity (LC50) in ethanol-citric acid 3% solvent was 80.023 ppm.

Co-Authors Addriyanus Amir Husin Andri Rizki Castiqliana Elisa Julianti Ellsworth Elmer Surya Era Yusraini Ervan Syahputra Fachry Wirathama Falma Irawati Sijabat Fatimah Fatimah Fenny Wijaya Fira Ayu Hasmita Florence T.N. Silalahi Jenmorisdo Saragih Michael Muhammad Turmuzi Orion Syaputra Putri Herfayati Ridwansyah Ridwansyah Saharman Gea Setiaty Pandia Setiaty Pandia Setiaty Pandia Silvia Syahrinal Anggi Daulay Tamaria Kesia Hutasoit Terip Karo-Karo Tommy

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