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All Journal Jurnal Rekayasa Proses Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Eksergi: Chemical Engineering Journal Elkawnie Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Rekayasa Proses Risenologi Jurnal Abdidas Pelita Masyarakat Jurnal Pengabdian kepada Masyarakat Nusantara Unri Conference Series: Community Engagement Journal of Applied Materials and Technology Journal of Rural and Urban Community Empowerment Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Community Engagement Research for Sustainability JURNAL KIMIA SAINTEK DAN PENDIDIKAN Seminar Nasional Produk Terapan Unggulan Vokasi Estungkara: Jurnal Pengabdian Pendidikan Sejarah Nanggroe: Journal Of Scholarly Service Jurnal Pengabdian Masyarakat Bangsa Nanggroe: Journal of Scholarly Service BATOBO: Jurnal Pengabdian Kepada Masyarakat Inspirasi: Jurnal Pengabdian Masyarakat Jurnal Rekayasa Proses Journal of Engineering and Technological Sciences Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran

Desi Heltina

Universitas Riau

Author-ID : 279172

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Transportation Other

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Modification of Carbon Nanotube for Synthesis of Titania Nanotube (Tint)-Carbon Nanotube (Cnt) Composite Heltina, Desi
Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 1, No 1 (2016)
Publisher : University of Muhammadiyah Malang

Carbon nanotube (CNT) is a material widely chosen for object of research in nano technology. Apart from its good absorbent property, CNT also has a unique structure, superior mechanic and electric properties and its high strength. The property of CNT above is to be expected to improve performance of Titania nanotube (TiNT) composite. Properties of pure CNT are hydrophobic at the surface and low dispersion stability. To improve dispersability of CNT then modification need to be modified. Adding Cetyl trimethyl ammonium bromide (CTAB) surfactant on CNT is a way to increase dispersion stability of TiNT-CNT. The objective of the research was to study influence of adding of Cetyl trimethyl ammonium bromide (CTAB) surfactant to synthesis of TiNT-CNT composite in degrading phenol compound. Pure CNT was added with CTAB surfactant in liquid, then was sonificated and dried. Surfactant Cetyl trimethyl ammonium bromide (CTAB) added CNT then composited with TiNT. Phenol degradation then tested by using TiNT-CNT (CTAB) in reactor for 4.5 hours. Then sample was characterized by employing Field Emission Scanning Electron Microscopy (FESEM), X-ray Diffraction (XRD), Fourier Transform Infra-Red (FTIR) and UV-vis Spectroscopy. The result of experiments from FESEM characterization showed forming of TiNT-CNT composites morphology. From Xâray Diffraction (XRD) characterization showed crystal formed on TiNT-CNT only of anatase crystal. Degradation of TiNT-NT composite (CTAB) to phenol was also studied.

Kinerja Komposit Magnetik Graphene/Tio2/Fe3o4 Dalam Mendegradasi Fenol Dan Pemisahan Hasil Fotodegradasi Fenol Adharianti, Nia; Heltina, Desi; Aman, Aman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Titanium dioxide (TiO2) is the most widely used material in the photocatalysis process, one of which is to degrade phenol waste. The photocatalysis process can degrading waste compounds become more environmentally friendly compounds, namely CO2 and H2O. To increase the adsorption ability and photocatalysis process efficiency, titanium dioxide was added with carbon-based materials namely graphene. The addition of magnetic materials such as Fe3O4 is expected to facilitate the process of separating photocatalyst with magnetic fields. This research was aims to get graphene/TiO2/Fe3O4 composites for separation of phenol photodegradation results and characterizing graphene/TiO2/Fe3O4 composite. Procedure of this research started with the modification of graphene with cocoPAS surfactant, synthesis of Fe3O4, and synthesis of graphene/TiO2/Fe3O4 composite, performance test of composite using phenol and then magnetic separation test. Morphology of composite graphene/TiO2/Fe3O4 were characterized using SEM analysis. Concentration of phenol photodegradation results were analized using UV-Vis spectrophotometer. The synthesized graphene/TiO2/Fe3O4 composite is successfully in degrading phenol by 57,45 % with the magnetic separation test is 60 minutes.Keywords: photodegradation, magnetic composite, titanium dioxide, graphene, magnetite

Prarancangan Pabrik Fenol Dan Aseton Dari Cumene Dengan Proses Kbr Dengan Disain Alat Utama Reaktor Hidrogenasi (R-103) Sitinjak, Monaeka; Heltina, Desi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Phenol or hydroxybenzene is an organic compound which is widely used. Phenols are also used to produce various substances such as bisphenol-A, phenolic resins, caprolactam, alkyl phenols, and anilines. Acetone is used as a solvent for gums, waxes, resins, oils, dyes and cellulose because it has excellent dissolving properties. The wide use of these materials causes the domestic demand for phenol and acetone to increase every year. This chemical plant is designed to produce phenol and acetone with a capacity of 30,000 tonnes per year. One of the main equipment in this plant is the hydrogenation reactor (R-103). This equipment is designed for the hydrogenation reaction scene between alpha methyl styrene (AMS) and hydrogen. The output of the reactor is in the form of cumene which will be recycled to be fed to M-101 and then used as raw material for making CHP on R-101. This type of reactor is a bubble column reactor using a cooling jacket and is operated at a temperature of 388.15 K and a pressure of 3.039 bar. The liquid feed flow rate is 1353,6109 kg per hour. The gas feed flow rate is 51,274 kg per hour, consisting of cumene and AMS for liquid feed and hydrogen for gas feed. The reactor height is 2,875 m, diameter of 1.3716 with a support and head types, namely torispherical and dished. Economic analysis is carried out to see the feasibility of the factory. Based on the economic feasibility analysis, the phenol and acetone factories were feasible to be built with a 4-year PBP, 13.039% IRR, 25.03% ROI, and 50% BEP. Keywords: phenol, acetone, hydrogenation, reactor bubble column, economic analysis

Pengaruh Suhu Pada Proses Degradasi Fenol Dengan Menggunakan Komposit Titania-Carbon Nanotube(Cetyltrimethylammonium Bromide) Avisa, Utari; Heltina, Desi; Fermi, M Iwan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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One type of hazardous industrial waste is phenol. The photocatalysis process has become the choice for the treatment of phenol waste. Titanium dioxide or titania (TiO2) is a photocatalyst material that is often used. Carbon nanotubes (CNT) are known to be used to improve the performance of TiO2 photocatalyst material. The CNT used was modified with CTAB (Cetyltrimethylammonium bromide) surfactant. The purpose of this research are to determine the effect of temperature degradation on the performance of the Titania-CNT (CTAB) composites in degrading phenols through the process of photocatalysis. The study began with surface modification of CNT using CTAB surfactant. Then the modified CNT was compiled with TiO2. Then Titania-CNT (CTAB) composite performance in degradating phenol was tested using a variation of the degradation temperature of 40oC and 50oC. The results of this research indicate that as the temperature increases, the phenol which can be degraded by the Titania-CNT (CTAB) composite is also increasing. The highest effectiveness of composite TitaniaCNT (CTAB) performance was obtained when the degradation temperature of 50oC was 99.54%. Keywords : phenol, photocatalysis, composites, TiO2, CNT, CTAB

Pengaruh NAOH Dan HCL Terhadap Efisiensi Laju Korosi Pada Baja ASTM A36 Menggunakan Ekstrak Daun Ketapang (Terminalia Catappa.L) Sinaga, Veranica; Komalasari, Komalasari; Heltina, Desi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Corrosion is damage or deterioration in the quality of a metal caused by reactions to the environment. Corrosion is a natural process that will never stop or will continue to occur as long as the metal material is in contact with its environment. However, the corrosion process can be controlled, minimized, or slowed down by the addition of an inhibitor. This research begins with the manufacture of ketapang leaf extract using the maceration method for 6 days with the volume ratio of ethanol-aquadest solvent (1: 4) The test method carried out in this research is the weight loss method by using variations in the concentration of Terminalia catappa. L leaf extract (0 and 2 g / L) with long soaking time (36, 48, 60 and 72 hours) in a corrosive solution of 1M HCl and 1M NaOH. The highest inhibition efficiency value in HCl corrosion media at 2 g / L inhibitor concentration with soaking time of 72 hours was 83.32%. Keywords: corrosion rate, inhibitor, Terminalia catappa. L leaf extract.

Modification of Carbon Nanotube for Synthesis of Titania Nanotube (Tint)-Carbon Nanotube (Cnt) Composite Desi Heltina
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 1 No. 1 (2016)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v1i1.4478

Carbon nanotube (CNT) is a material widely chosen for object of research in nano technology. Apart from its good absorbent property, CNT also has a unique structure, superior mechanic and electric properties and its high strength. The property of CNT above is to be expected to improve performance of Titania nanotube (TiNT) composite. Properties of pure CNT are hydrophobic at the surface and low dispersion stability. To improve dispersability of CNT then modification need to be modified. Adding Cetyl trimethyl ammonium bromide (CTAB) surfactant on CNT is a way to increase dispersion stability of TiNT-CNT. The objective of the research was to study influence of adding of Cetyl trimethyl ammonium bromide (CTAB) surfactant to synthesis of TiNT-CNT composite in degrading phenol compound. Pure CNT was added with CTAB surfactant in liquid, then was sonificated and dried. Surfactant Cetyl trimethyl ammonium bromide (CTAB) added CNT then composited with TiNT. Phenol degradation then tested by using TiNT-CNT (CTAB) in reactor for 4.5 hours. Then sample was characterized by employing Field Emission Scanning Electron Microscopy (FESEM), X-ray Diffraction (XRD), Fourier Transform Infra-Red (FTIR) and UV-vis Spectroscopy. The result of experiments from FESEM characterization showed forming of TiNT-CNT composites morphology. From X–ray Diffraction (XRD) characterization showed crystal formed on TiNT-CNT only of anatase crystal. Degradation of TiNT-NT composite (CTAB) to phenol was also studied.

Uji Kinerja Komposit TiO2-Graphene/Surfaktan dalam Mendegradasi Senyawa Fenol Desi Heltina; Dwi Imamatul Mastura; Arif Partama
Risenologi Vol. 6 No. 1b (2021): CASTLE: Conference on Social, Science, Technology, Language and Education Rese
Publisher : Kelompok Peneliti Muda Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47028/j.risenologi.2021.61b.244

Phenol is a hazardous compound that is often found in wastewater in most industries and cannot be degraded naturally. Photocatalysis is a promising method to reduce phenol waste, because it can produce more environmentally friendly compounds like CO2 and H2O. Titanium dioxide (TiO2) has been widely applied in the degradation process of waste compounds including phenol waste. To improve the performance of TiO2, graphene can be used as a dopants because it has a surface area. Modification of graphene with surfactants was carried out to increase dispersion and reduce agglomeration on TiO2 doped with graphene. The purpose of this research is to synthesize TiO2–graphene/surfactant composite which can be used to degrade phenolic compounds. Photodegradation of TiO2 composites was carried out by varying the initial concentration of phenol (10, 20, 30 ppm). Composites synthesis begins with disperse the surfactant on the surface of the graphene, then proceeds with doping graphene (surfactant) on TiO2. The resulting composites were characterized using SEM, BET, FTIR, XRD and UV-Vis spectrophotometer. The phenol degradation process was carried out using a photodegradation reactor. The highest performance TiO2–graphene/surfactant composite was obtained at an initial concentration of 10 ppm phenol is 81.02%

Pengaruh Konsentrasi Fenol terhadap Efektivitas Fotodegradasi Fenol menggunakan Komposit Titania-Carbon Nanotube (Surfaktan) Desi Heltina; Nadhia Gasani Putri; Panca Setia Utama
Eksergi Vol 17, No 2 (2020)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v17i2.3691

Aromatic compounds in industrial wastewater such as phenols can contribute as pollutants which are highly toxic and carcinogenic. Phenol degradation can be carried out by a photocatalytic process which can convert phenol into non-toxic and enviromentally friendly compounds. The performance of titania (TiO2) photocatalyst was enhanced by using carbon nanotube as a doping agent for titania. To reduce carbon nanotube agglomeration, the surface of carbon nanotube was modified with cocoPAS surfactant. The purpose of this study was to synthesize titania-carbon nanotube-cocoPAS composite and evaluated the effect of initial phenol concentration (10, 20, 30 ppm) on the phenol photodegradation effectivity using titania-carbon nanotube-cocoPAS composite. Titania-carbon nanotube-cocoPAS composite synthesis was carried out by forming a composite between TiO2 and carbon nanotube that had been modified by surfactant. Composite were characterized by SEM, FTIR, and XRD. Phenol photodegradation was carried out at a degradation temperature of 50ºC for 4 hours under UV light. Samples were drawn at regular intervals and residual concentration of phenol in each sample was analysed using UV-Visible spechtrophotometer. The highest degradation effectivity in 4 hours was 81% at initial phenol concentration of 10 ppm.

Biosorpsi Pb (II) Pada Jamur Trichoderma Asperrellum TNJ-63 Desi Heltina; Evelyn; Renny Indriani
Jurnal Rekayasa Proses Vol 3, No 1 (2009)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Logam berat Pb2+ merupakan senyawa yang sangat beracun dan sangat berbahaya bagi makhluk hidup. Salah satu cara untuk menanggulanginya adalah dengan biosorpsi menggunakan jamur. Penelitian ini bertujuan menentukan kapasitas jerap maksimum dan model kesetimbangan biosorpsi Pb2+dengan menggunakan jamur Trichoderma asperellum TNJ-63. Sejumlah jamur Trichoderma asperellum TNJ-63 dimasukkan ke dalam erlenmeyer yang berisi larutan Pb2+ 100 ppm pada suhu ruang dengan massa jamur yang divariasikan. Lama waktu tercapainya kesetimbangan dipelajari dengan memvariasi lama waktu penjerapan dan kecepatan pengadukan. Hasil penelitian menunjukkan bahwa maksimum penjerapan Pb2+ pada jamur Trichoderma asperellum TNJ-63 adalah sebesar 98,24%. Mekanisme proses biosorpsi Pb2+ pada Trichoderma asperellum TNJ-63 mengikuti model isoterm Freundlich. Kata kunci: logam berat, biosorpsi, jamur Trichoderma asperellum, isoterm Freundlich Heavy metal Pb2+ is a highly toxic substance and is very dangerous for living creatures. Biosorption with fungi is one of the abatement methods to reduce the metal contaminant in environment. The present study aimed at determining the maximum biosorption capacity and the equilibrium model of Pb2+ biosorption by Trichoderma asperellum TNJ-63. Some Trichoderma asperellum TNJ-63 varied in amount were put into an erlenmeyer flask containing a solution of Pb2+ with an initial concentration of 100 ppm at room temperature. Variation of stirring speeds (80, 130 and 180 rpm) was also carried out to study its effect on the time required to reach equilibrium. The result showed that Pb2+ could be effectively adsorbed by Trichoderma asperellum TNJ-63 as the biosorbent and its biosorption could reach its maximum by as much as 98.24% (w/w). Calculation result showed that the mechanism of Pb2+ biosorption on Trichoderma asperellum TNJ-63 followed Freundlich isotherm model with an average error of 0.098%. Keywords: heavy metal, biosorption, Trichoderma asperellum, Freundlich isotherm

Pengaruh Konsentrasi H2so4 Terhadap Laju Korosi Dan Efisiensi Menggunakan Ekstrak Daun Salam (Syzgium Polyantha L) Paian Harianja; Komalasari Komalasari; Desi Heltina
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Corrosion cause a material has a limited lifespan,where teh material that was estimated for a long-term use turns out to had a shorter lifespan than its avreange lifespan. One of the prevention of the corrosion was to used corrosion inhibitors that made using organic material was Bay leaf (Syzgium Polyantha L) This research beginss with the manufacture of the bay leaf extract using maceration method for 6 days. The calculation method used in this study was a method of measured weight loss with inhibitor concentrations of bay leaf extract (2 gr/L), variations time were (24, 36, 48 and 60 hours) and corrosion media concentration H2SO4 ( 0.5 and 1 M). The highest inhibition efficiency in the addition of inhibitors 2 gr/L with corrosion media concentration H2SO4 0.5 M of time 60 hour was 70.370% Keywords: aluminium, bay leaf extract, corrosion inhibitor, corrosion rate

Co-Authors , Deviona, , Abid, Hussein Rasool Adharianti, Nia Ahmad Fadli Alfarisi, Cory Dian Alhabsy Affif Altarawneh, Mohammednoor Aman Aman Aman Aman Amelia, Rahma Amun Amri Amun Amri Annisa Ulhasanah Aqilla Cahyani Ari Sandhyavitri Arif Partama Asri, Ebel Vigrajuska Avisa, Utari Azhar, Muhammad Rizwan Azhari, Aulia Akmal Azhari, Ayu Azridjal Aziz Butar-Butar, Wahyu Tri Efendi Chairul Chairul Chairul Chairul Chairul, Chairul Delef, Fahrul Fajar Drastinawati Drastinawati Drastinawati Drastinawati Drastinawati Drastinawati, Drastinawati Dwi Imamatul Mastura Dwi Widyaningsih Eden Putra Edy Saputra Efrina, Restika Evelyn Evelyn Evelyn Evi Nadhifah Evi Nadhifah Fabryza, Dhina Fadhil, Rayhan Fadhila Ulfa Fahreza, Muhammad Fahrul Fajar Delef Fajar Restuhadi Fajri Aziz, Lutvhi Fanny Septya Fauziyah, Hidayatul Fesya Putri, Andini Fitri Zulva Hasanah Fitri, Lara Ismano Hapsoh Hasby Herdinasrul Hendro Ekwarso Hendro Ekwarso Idral Amri isna dini Isna Rahma Dini Iwana, Iwana Jailani, M. Fariz Jiang, Zhong Tao Komalasari Komalasari Komalasari Komalasari Komalasari Komalasari Laia , Ferlinus Saputra Liyana , Audi Lubis, Nursiani M. Iwan Fermi M. Nanda Dwi Putra M. Yovi, M. Yovi Maria Peratenta Sembiring Maysandy, Lily Mery Sukmiwati Miran, Hussein A. Misrulina Misrulina Muhammad Zaqi Nadhia Gasani Putri Nurfatihayati Nurul Azizah Paian Harianja Panjaitan, Zahwatul Nabila Peratenta Sembiring, Maria Praswasti PDK Wulan, Praswasti PDK Prawiranegara, Barata Aditya Primbodo , Selo Bambang Putra, Eden Putri Nawangsari, Putri Putri, Nazifa Ayu Rahman, M. Mahbubur Rahmi Adisti Raihan Daffansyah Sinaga Ramadhani , Micha Vania Reni Yenti, Silvia Renny Indriani Renny Indriani Ridwan Manda Putra Rizaldi Saputra Rozanna Sri Irianty Safridatul Audah Sarma, Deki Sativa, Oriza Sherly Fitri Rahmadhani Silvia Reni Yenti Silvia Reni Yenti Sinaga, Veranica Sitinjak, Monaeka Slamet . Soleha, Elisa Sri Djuniati Sri Yoseva Suhendri Suhendri Sukendi Sukendi Sunarno Sunarno SYAIFUL BAHRI Syamsu Herman Syamsu Herman Tao Jiang, Zhong Tarigan, Melisa Phebeyola E. Tengku Nurhidayah Tesa Agustin Utama, Panca Setia Wahyu Hidayat Waruwu, Desriang Wulandari, Revika Yahlim , Wasiah Fichtimar Yayan Setiawan Yolanda, Yogi Yusnimar Sahan Z Zulfansyah Zelfira, Afragenia Zulfansyah Zulfansyah Zulkarnain Zulkarnain Zulkarnaini Zulkarnaini Zuqni Meldha

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