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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Journal of Energy, Mechanical, Material and Manufacturing Engineering Risenologi Jurnal Pengabdian kepada Masyarakat Nusantara (JPkMN) Unri Conference Series: Community Engagement Journal of Community Engagement Research for Sustainability JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Desi Heltina
Jurusan Teknik Kimia, Fakultas Teknik, Universitas Riau
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Public Health Social Sciences 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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.166 KB) | DOI: 10.22219/jemmme.v1i1.4478

Abstract

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.
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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Abstract

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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Abstract

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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Abstract

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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Abstract

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.
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

Abstract

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%
Pemanfaatan sampah styrofoam untuk pembuatan lem lateks dalam upaya mengurangi limbah styrofoam di TPA Muara Fajar Timur Kecamatan Rumbai Pekanbaru Desi Heltina; Amun Amri; Panca Setia Utama; Aman Aman
Unri Conference Series: Community Engagement Vol 2 (2020): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.2.72-76

Abstract

Various types of waste are found in TPA Muara Fajar Timur, Rumbai District, Pekanbaru. One of the waste that does not decompose is styrofoam. If styrofoam is not handled seriously, it will have an impact on the environment and endanger the surrounding community. Styrofoam waste contains polystyrene foam which contains hazardous materials for health and the environment. For this reason, efforts should be made to handle the styrofoam waste, namely by recycling styrofoam into useful and economical products. One of the uses of Styrofoam waste is making latex glue. Latex glue is a product that is widely used by the community so that if it is produced it will be able to meet the needs both for themselves and for the needs of the community. Latex glue is made from styrofoam by adding toluene and surfactants (sodium lauryl sulfate / SLS) or by adding gasoline to Styrofoam.The results obtained were that the community could understand and be able to make latex glue. The results of the success questionnaire show the high interest and benefits of this activity. This shows that this activity has been successfully implemented in Muara Fajar Timur Village, Rumbai District, Pekanbaru.
Pelatihan Pembuatan Jamu d alam Upaya Meningkatkan Imunitas Masyarakat Kelurahan Muara Fajar Timur Kecamatan Rumbai Pekanbaru Desi Heltina; Amun Amri; Silvia Reni Yenti; Komalasari Komalasari; Evelyn Evelyn; Isna Rahma Dini
Unri Conference Series: Community Engagement Vol 3 (2021): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.3.445-449

Abstract

In the midst of the health crisis due to the ongoing Covid-19 pandemic, traditional medicine is an alternative that can be used by the community to break the chain of transmission and maintain body immunity. Immunity is important during the Covid-19 pandemic. The better a person's immune system is to fight infection, the less likely a person is to get the disease. The community has a very important role in efforts to develop traditional health by utilizing medicinal plants. Ginger and Turmeric are types of medicinal plants that are widely used as kitchen spices, and have benefits for increasing the body's immunity. The content of cincol and zingiberen in ginger acts as an antioxidant that can improve the work of the immune system. While turmeric contains curcumin compounds which act as an antiviral. The purpose of this research is to provide skills to the people of Muara Fajar Timur Village in processing medicinal plants into herbal products that are delicious to consume, useful for increasing immunity, and have economic value. Activities are carried out by direct training methods and distribution of herbal products to the community. The result of this activity is that the community can understand and be able to make herbal medicine. The success of this activity can be seen from the responses in the form of questions and answers and discussions with the training participants, the high interest of participants in participating in the activity and the benefits derived from this activity. This shows that this activity has been successfully implemented in Muara Fajar Timur Village, Rumbai District, Pekanbaru.
EKSTRAKSI UNSUR FERRUM DARI LIMBAH PADAT PABRIK PULP DAN KERTAS Maria Peratenta Sembiring; Desi Heltina; Chairul Chairul; Zulfansyah Zulfansyah
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 6 No 1 (2022): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (141.292 KB) | DOI: 10.51544/kimia.v6i1.3012

Abstract

Functioning industrial waste as raw material or as a product is an achievement that will continue to be optimized, especially in industries where the amount of waste is significant. Pulp and paper mills produce waste in the form of solid, sludge, liquid and gas. The objective of this research is to extract the element ferrum contained in one of the solid wastes in pulp and paper mills. By using two fatty amine extractor, lauryl amine and stearyl amine with ethanol and n-hexane as solvents. The results showed that the use of stearyl amine as an extractor and n-hexane as a solvent with operating conditions of 4 hours and a dose of 5 grams gave the best results with an extraction yield of 10,964 mg/kg.
Difusi Produk Intermediate Baru Very Few Layers Graphene (VFLG) dan Produk Turunannya oleh Inkubator Bisnis Graphene Guard Amun Amri; Silvia Reni Yenti; Desi Heltina; Syamsu Herman; Azridjal Aziz; Evi Nadhifah; Hendro Ekwarso
Journal of Community Engagement Research for Sustainability Vol. 2 No. 5 (2022): September
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/cers.2.5.217-226

Abstract

Product diffusion of very few layers of graphene (VFLG) and its derivative (car/motorcycle polish) has been carried out by the Graphene Guard business incubator. The steps and strategies began with discussions in a discussion group forum (FGD) inviting experts in order to find the best marketing patterns. In this case the Canvas method was chosen as a marketing strategy. As a follow-up to the results of the FGD, several activities were carried out. Improvements to the system and production capacity were carried out by adding production equipment, innovating production systems and creating production automation systems. The next step was to design brand and logo activities as well as product labels. The design and manufacture of online and offline sales systems were carried out to follow up on increasing production capacity. To increase the effectiveness of marketing, promotional activities were carried out in the form of advertising, creating brochures, production videos and participating in exhibitions. The results obtained indicated that the marketing of the new intermediate product, very few layer graphene (VFLG) and its derivative products in the form of car polishes, was still experiencing diffusion problems, as evidenced by the low sales capacity. This was realized because this product was a new product and was not yet known to the public. Especially for VFLG products, the additional obstacle was that this product was an intermediate product, thus only certain groups of people need it. Evaluation steps are needed for continuous improvement in order to continue to strengthen the diffusion of this product in society.
Co-Authors , Deviona, , Adharianti, Nia Alhabsy Affif Aman Aman Aman Aman Amun Amri Annisa Ulhasanah Aqilla Cahyani Arif Partama Avisa, Utari Azridjal Aziz Chairul, Chairul Dwi Imamatul Mastura Evelyn Evelyn Evi Nadhifah Fanny Septya Fermi, M Iwan Fitri Zulva Hasanah Hapsoh Hasby Herdinasrul Hendro Ekwarso isna dini Isna Rahma Dini Komalasari Komalasari Komalasari Komalasari M. Iwan Fermi Maria Peratenta Sembiring Misrulina Misrulina Nursiani Lubis Nurul Azizah Praswasti PDK Wulan, Praswasti PDK Rahmi Adisti Rizaldi Saputra Sherly Fitri Rahmadhani Silvia Reni Yenti Silvia Reni Yenti Sinaga, Veranica Sitinjak, Monaeka Slamet . Sri Yoseva Syamsu Herman Utama, Panca Setia Yusnimar Yusnimar Z Zulfansyah