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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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Aktivitas Fotodegradasi Fenol Dengan Variasi Suhu Degradasi Menggunakan Komposit Tio2-Cnt(Cocopas) Nadhia Gasani Putri; Desi Heltina; Panca Setia Utama
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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Phenols found in the wastewater of some industries have acute toxicity. The photocatalysis process can be used to degrade organic compounds such as phenols. To increase the photocatalytic activity of TiO2, a composite formation was formed between TiO2 and carbon nanotubes (CNT). Before being composited, CNT dispersion was carried out using cocoPAS surfactant as dispersing agent. The purpose of this study is to determine the effect of degradation temperature on phenol degradation. The process of making TiO2-CNT(cocoPAS) composites begins by dispersing CNT with cocoPAS surfactants and then composite with TiO2. Photocatalytic activity of the TiO2-CNT(cocoPAS) composite was tested at an initial phenol concentration of 30 ppm with variation of degradation temperature of 30,40 and 50ºC for 4 hours under UV light. Morphology of TiO2-CNT(cocoPAS) composites were characterized using SEM and phenol concentrations were characterized using a UV-Vis spectrophotometer. The highest degradation of phenols by TiO2-CNT(cocoPAS) composites at the initial phenol concentration of 30 ppm was at the degradation temperature of 50ºC, which was 35.59%.Keywords : photocatalysis, composite, TiO2, CNT, cocoPAS, phenol, temperature

Pengaruh Rasio Solid Liquid Dan Penambahan Graphene Nanosheets Terhadap Kuat Tekan Mortar Geopolimer Berbasis Palm Oil Fuel Ash (POFA) Dan-Flyash Batu Bara Muhammad Zaqi; Amun Amri; Desi Heltina
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Geopolymer mortar is a material that has high SiO2 and Al2O3 content and has the potential to be used as a base for making geopolymer mortar. This study aims to make geopolymerbased mortar (POFA) and coal flyash with the addition of graphene, and variations in the addition of graphene to the mechanical and morphological properties of the geopolymer mortar. The preparation of the geopolymer mortar includes several steps, namely the preparation and mixing of materials with various solid liquid ratios of 72:28, 60:40, and 80:20, then proceed with the preparation of an activator alkaline solution (10 M NaOH + Sodium silicate) and the addition of graphene with variations of 0%, 1% wt, 2% wt, and 3% wt. The results of the morphological analysis showed that the increased cavity that was formed increased along with the increase in the amount of graphene added. While the results of the compressive strength test showed that the highest compressive strength was obtained at 19,2 Mpa at a solid liquid ratio of 60:40 and the lowest compressive strength was obtained at 12,8 Mpa at a solid liquid ratio of 80:20. Keywords : geopolymer mortar, coal fly ash, graphene, POFA

Prarancangan Pabrik Fenol Dan Aseton Dari Cumene Menggunakan Proses KBR Dengan Disain Alat Utama Menara Distilasi Fenol (D-106) Tesa Agustin; Desi Heltina
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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The need for phenol and acetone in Indonesia is increasing every year. Based on data from the Central Bureau of Statistics, in the last 5 years, the amount of phenol imports was 20,000 - 26,000 tons/year and the amount of acetone imports was 17,000-22,000 tons/year. Phenol is used as raw material for caprolactam industry, raw material for bisphenol-A whichis used in the manufacture of alkylphenols, phenolic resins, and anilines. While acetone is used as a solvent for waxes, gums, dyes, resins, oils and cellulose. The phenol and acetone factories were designed using the KBR process with cumene as raw material. This plant is planned to operate for 330 days per year and work continuously for 24 hours / day with capacity of 30,000tons / year which will be established in Dumai, Riau. The main tool designed is a phenol distillation tower (D-106) which functions to separate phenol from its mixed compounds. The distillation tower has a height of 10.3548 m and a diameter of 2.286 m with a type of sieve tray distillation and torispherical head with a phenol product purity of 97%. Total Capital Investment for phenol and acetone factories was Rp. 185,258,095,680 with a Fixed Cost value of Rp. 71,474,886,729. The economic analysis of the feasibility of the factory shows that the factory is feasible to build, which can be seen from the analysis of the IRR value obtained of 49.82%, the ROI value of 19.84%, and the pay back period of 4.54 years.Keywords: acetone, cumene, distillation tower, KBR process, phenol

Uji Kinerja Fotokatalis Komposit Tio2-Graphene (Cocopas) Untuk Degradasi Fenol Fadhila Ulfa; Desi Heltina; Komalasari Komalasari
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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Phenol is a chemical compound that is one of the hazardous industrial wastes. An excessive concentration of phenol can cause damage in the environment and human life. Phenol removal can be done by photocatalysis process using photocatalyst materials such as titanium dioxide (TiO2).TiO2 was composited with graphene to increase the photocatalytic activity of TiO2. Graphene was modified with cocoPAS before to disperse graphene when composited with TiO2. TiO2-Graphene (cocoPAS) composite was characterized by SEM. Based on the results of characterization, it can be seen that TiO2 particle loaded on the graphene sheet which indicates that the composites have been successfully made. The performance of the TiO2-Graphene (cocoPAS) composite in phenol degradation was tested in a photocatalysis process for 4 hours. A variable in this photocatalysis process is photocatalysis temperature (40 and 50 oC). the most effective TiO2-Graphene (cocoPAS) composite performance was achieved when the photocatalysis temperature is 50 oC, which can degrade phenol by 97% in 4 hours.Keywords: CocoPAS , degradation, photocatalysis, phenol, graphene, titanium dioxide

Pengolahan Limbah Cair Industri Minyak Sawit Menggunakan Reaktor Listrik Plat Kolom Secara Kontinu serta dengan Penambahan PAC Dwi Widyaningsih; Idral Amri; Desi Heltina
Journal of Bioprocess, Chemical and Environmental Engineering Science Vol 2 No 1 (2021): Journal of Bioprocess, Chemical, and Environmental Engineering
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, UNRI

Palm oil industrial waste contains various dissolved compounds in the form of short fibers, hemicellulose, and their derivatives, proteins, free organic acids, a mixture of minerals and organic pigments such as anthocyanins, carotenes, polyphenols, lignins and tannins. Organic compounds in this waste will cause problems such as an increase in TSS, COD values which can pollute the environment. The electrocoagulation method has the potential to reduce TSS, TDS, COD content and neutralize pH. The purpose of this study was to determine the effect and optimum conditions of the electrocoagulation process with variations in flow rate, voltage, spacing between plates and the addition of poly aluminum chloride (PAC) coagulants to decrease TSS, COD and pH parameters so that they meet the quality standards of waste in Permen LH. No. 5/2014. The method used is a continuous electrocoagulation process using an aluminum catalyst and the addition of PAC. The variables used in this study were the stress variable (24; 26; 28 V) and the variable flow rate velocity (0.3; 1,2; 2.5 L / min) and the variation of the spacing between the plates (2, 3, 4 cm). The results of this study found that the optimum conditions were obtained at a voltage of 28 volts and a flow rate of 0.3, and a distance between the plates of 2 cm and the addition of 400 ppm PAC with a percentage of TSS removal of 92.093% from 2150 mg / L to 170 mg / L, and a decrease in COD of 85.343% from 1310 mg / L to 192 mg / L. The results obtained show that it is in accordance with the standards of the Ministry of Environment and Forestry Regulation No.5 of 2014.

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.558

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

Pengenalan cara membuat sabun colek kepada masyarakat Desa Pulau Payung Kecamatan Rumbio Jaya Kabupaten Kampar Desi Heltina; Drastinawati Drastinawati; Chairul Chairul; Mery Sukmiwati
Unri Conference Series: Community Engagement Vol 1 (2019): 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.1.219-222

Kebutuhan masyarakat meliputi sandang, pangan dan papan. Kebutuhan sandang dan pangan tidak terlepas dari proses pembersihan dan pencucian. Salah satu bahan yang digunakan untuk proses pencucian adalah sabun. Sabun colek banyak digunakan untuk kebutuhan rumah tangga karena bentuk sabun yang lembek, tidak basah, tidak kering sehingga mempermudah penggunaannya, yaitu mudah ditakar dan mudah digunakan untuk bagian-bagian yang sulit pada pakaian berkerah dan lipatan lengan. Untuk itu sabun colek menjadi alternatif dalam pemilihan jenis sabun. Jika sabun colek ini dapat dibuat sendiri maka akan dapat menghemat pengeluaran keuangan dan akan menjadi peluang usaha untuk masyarakat dalam upaya meningkatkan kemampuan wirausaha dalam memproduksi sabun sendiri pada skala kecil dan menengah untuk dijual ke Pasaran. Kegiatan pembuatan sabun ini akan dapat menambah pengetahuan masyarakat tentang ilmu dan teknologi serta dapat menambah pengetahuan tentang kewirausahaan. Pengabdian ini direncanakan dilaksanakan pada kelurahan Pulau Payung kecamatan Rumbio Jaya Kabupaten Kampar. Kegiatan dilakukan dengan metode dalam bentuk penyuluhan yaitu mengenalkan cara pembuatan sabun colek dengan metode ceramah, diskusi dan melakukan demonstrasi/praktek pembuatan sabun colek. Kegiatan ini juga mendukung program pemerintah dalam meningkatkan kemampuan masyarakat dalam memproduksi barang kebutuhan sehari hari untuk menghemat pengeluaran masyarakat dan pada akhirnya dapat meningkatkan kesejahteraan masyarakat.

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

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

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

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.

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 Dini, Isna Drastinawati Drastinawati Drastinawati Drastinawati, Drastinawati Dwi Imamatul Mastura Dwi Widyaningsih Efrina, Restika Evelyn Evelyn Evelyn Evi Nadhifah Fabryza, Dhina Fadhil, Rayhan Fadhila Ulfa Fahreza, Muhammad Fajar Restuhadi Fajri Aziz, Lutvhi Fauziyah, Hidayatul Fesya Putri, Andini Fitri Zulva Hasanah Fitri, Lara Ismano Hapsoh Hasby Herdinasrul Hendro Ekwarso Idral Amri 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 Nurwijayanti 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 Septya, Fanny 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 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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