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All Journal Journal of Science and Applicative Technology Jurnal Pendidikan Kimia (JPKim) Martabe : Jurnal Pengabdian Kepada Masyarakat Sarwahita : Jurnal Pengabdian Kepada Masyarakat Eduproxima : Jurnal Ilmiah Pendidikan IPA Indonesian Journal of Chemical Science and Technology Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun EDUCENTER JURNAL PENDIDIKAN

Herlinawati Herlinawati

Universitas Negeri Medan

Author-ID : 3310784

Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Analysis of the Utilization of VCO as a Glucose Level Reducing Material in Brown Rice Using a UV-VIS Spectrophotometer Magdalena E Manik; Herlinawati Herlinawati
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 4, No 1 (2021): JANUARY 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v4i1.23089

This research aims to determine the effect of adding VCO on glucose levels in brown rice that cooked by rice cooker and steamer. Sample preparation is done by adding VCO to brown rice and cooking simultaneously. The samples were measured for their glucose levels by adding phenol and sulfuric acid to the sample and then measuring their absorbance using a UV-VIS spectrophotometer. The results showed that the addition of VCO affected glucose levels in brown rice. The highest level of glucose in brown rice was 32,178 ppm without the addition of VCO and the lowest level was 0.946 ppm with the addition of 5% VCO. Meanwhile, the highest level of glucose in brown rice in a steamer was 22,268 ppm without the addition of VCO and the lowest was 0,768 ppm with the addition of 5% VCO.

Pengabdian Kepada Masyarakat (PKM) dalam Pengolahan Air Bersih di Desa Sukajadi Feri Andi Syuhada; Ahmad Nasir Pulungan; Ani Sutiani; Hafni Indriati Nasution; Junifa Layla Sihombing; Herlinawati Herlinawati
Jurnal Pengabdian Kepada Masyarakat (JPKM) TABIKPUN Vol. 2 No. 1 (2021)
Publisher : Faculty of Mathematics and Natural Sciences - Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpkmt.v2i1.23

Keterbatasan pasokan air bersih untuk memenuhi kebutuhan masyarakat menjadi kendala utama yang dialami warga di Desa Sukajadi. Dengan keterbatasan pengetahuan, sarana, prasarana dan ekonomi, warga terus menggunakan air yang tidak sehat untuk kebutuhan rumah tangga. Oleh karena itu, masyarakat sangat perlu diberi pengetahuan dan keterampilan pengolahan air bersih. Kegiatan pengabdian kepada masyarakat (PKM) dalam Pengolahan Air Bersih di Desa Sukajadi bertujuan untuk: 1) meningkatkan pengetahuan tentang air bersih dan budaya hidup bersih, 2) memberikan keterampilan teknologi proses pengolahan air bersih. Tujuan tersebut dicapai dengan kegiatan berupa penyuluhan, pelatihan, dan penerapan teknologi tepat guna untuk mengolah air bersih. Hasil yang dicapai adalah: 1) meningkatnya pengetahuan mitra tentang pentinganya air bersih bagi kesehatan, 2) mitra telah memiliki pengetahuan dan ketrampilan pengolahan air bersih untuk rumah tangga.

Pelatihan Pembuatan Hand Sanitizer Sebagai Edukasi Pencegahan Dini Covid-19 Di SD Swasta Bani Adam AS Makharany Dalimunthe; Susilawati Amdayani; Junifa Layla Sihombing; Gulmah Sugiharti; Herlinawati Herlinawati; Agus Kambaren; Lisnawati Simatupang
Jurnal Pengabdian Kepada Masyarakat (JPKM) TABIKPUN Vol. 3 No. 1 (2022)
Publisher : Faculty of Mathematics and Natural Sciences - Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpkmt.v3i1.74

Kegiatan PKM dilatarbelakangi dengan adanya keputusan pemerintah terkait pelaksanaan pembelajaran di zona kuning dan hijau, untuk dapat melaksanakan pembelajaran tatap muka dengan penerapan protokol kesehatan yang sangat ketat. SD Swasta Bani Adam AS adalah salah satu sekolah yang ikut melaksanakan pembelajaran tatap muka. Salah satu persyaratan yang harus dipenuhi supaya sekolah dapat melakukan pembelajaran tatap muka adalah ketersediaan sarana sanitasi dan kebersihan, seperti toilet bersih dan layak, adanya sarana cuci tangan pakai sabun atau hand sanitizer dan desinfektan. Oleh karena itu, kebutuhan hand sanitizer diperlukan sebagai alternatif untuk mencuci tangan di lingkungan sekolah. Metode pelaksanaan PKM ini adalah menjalin kerjasama Tim Pelaksana dan LPPM UNIMED, penyuluhan dan pelatihan kepada kelompok mitra. Dalam kegiatan ini Tim pelaksana telah mensosialisasikan tentang program Pengabdian, tujuan kegiatan, target dan luaran yang akan dicapai, dan untuk meningkatkan pengetahuan masyarakat mitra telah dijelaskan tentang pemanfaatan lidah buaya sebagai bahan alami dalam pembuatan hand sanitizer.

PELATIHAN PEMBUATAN SABUN BERBAHAN BAKU JELANTAH BAGI IBU PKK DI NAGORI DOLOK MARAJA KABUPATEN SIMALUNGUN Rudi Salman; Herlinawati; Irfandi; Dewi Endriani
Bahasa Indonesia Vol 17 No 02 (2020): Sarwahita : Jurnal Pengabdian Kepada Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/sarwahita.172.1

Abstract Scientifically soap is a mixture of sodium or potassium salts from fatty acids which can be derived from oil or fat which is reacted with lye (sodium or potassium hydroxide) through a saponification process. One of the raw materials for making soap is fat found in cooking oil waste (used for cooking). Dolok Maraja village has great potential in this soap-making business with the number of heads of families (KK) reaching 1449. Each month it produces 1 kg of cooking per family. So in 1 month about 1449 kg of used cooking is produced. The aim of the training on making used used soap is to develop the potential of the women of the Dolok Maraja Village PKK in creating soap products made from used cooking raw materials, which are household needs. The presenters and instructors from the Physics and Chemistry Education Study Program lecturers came to Dolok Maraja Village, then provided information and training to PKK women about making soap made from used cooking ingredients. Based on the results of the average score scores from the evaluation and mentoring carried out by the PKM Unimed team, the process of making solid soap which was followed by 10 participants was able to master immaterial in the Very Good category. For the manufacture of liquid soap with 16 participants in the Good category. Meanwhile, making dab soap is included in the category of not mastering because the process is quite long. Abstrak Secara ilmiah sabun merupakan campuran garam natrium atau kalium dari asam lemak yang dapat diturunkan dari minyak atau lemak yang direaksikan dengan alkali (natrium atau kalium hidroksida) melalui suatu proses saponifikasi. Salah satu bahan baku pembuat sabun adalah lemak yang terdapat pada limbah minyak goreng (jelantah). Desa Dolok Maraja sangat berpotensi dalam usaha pembuatan sabun ini dengan jumlah Kepala Keluarga (KK) mencapai 1449. Setiap bulannya menghasilkan jelantah 1 Kg/keluarga. Maka dalam 1 bulannya dihasilkan sekitar 1449 kg jelantah. Tujuan pelatihan pembuatan sabun berbahan baku jelantah ini adalah untuk mengembangkan potensi ibu-ibu PKK Desa Dolok Maraja dalam menciptakan produk sabun berbahan baku jelantah yang merupakan kebutuhan dalam rumah tangga. Pemateri beserta instruktur dari dosen Prodi Pendidikan Fisika dan Kimia datang ke Desa Dolok Maraja, kemudian memberikan informasi dan pelatihan kepada ibu-ibu PKK tentang pembuatan sabun berbahan baku jelantah. Berdasarkan hasil rata-rata skor nilai dari evaluasi dan pendampingan yang dilakukan oleh tim PKM Unimed, proses pembuatan sabun padat yang diikuti 10 pesert, mampu menguasa imateri dengan kategori Sangat Baik. Untuk pembuatan sabun cair dengan 16 peserta berkategori Baik. Sedangkan untuk pembuatan sabun colek termasuk dalam kategori kurang menguasai karena prosesnya cukup panjang.

OPTIMALISASI PEMBUATAN SABUN DARI MINYAK JELANTAH OLEH PKK DOLOK MARAJA KECAMATAN TAPIAN DOLOK SIMALUNGUN Rudi Salman; Herlinawati Herlinawati; Irfandi Irfandi; Mukti Hamjah Harahap; Dewi Endriani
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 4, No 1 (2021): Martabe : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v4i1.131-138

The purpose of community partnership activities is to help the partner group of women for Family Empowerment and Welfare (PKK) Nagori Dolok Maraja in utilizing used used oil waste by taking appropriate treatment so that it does not cause disease for the body and does not harm the natural ecosystem. The problem that exists in the community is waste of used cooking oil which is wasted and damages the water ecosystem. The location selection was due to the fact that there are people in the village who are entrepreneurs in the field of home industry and do not yet have economic independence. Besides that, they also have difficulties in developing their business. From the activities carried out, data was obtained during the training and assistance in making liquid soap 9 participants (24%) with very good categories, 10 participants (26%) in good categories, 16 participants (42%) in the Enough category and 3 Participants (8%) were in the poor category. The method used in this activity is assistance and the process of making soap from waste used cooking oil. Assistance and guidance starting from the aspect of awareness about health in consuming cooking oil, the use of waste oil into soap, the production process using appropriate technology so as to give birth to people who are able and economically independent and conservation.

Separation of Sb (V) and Sb (III) antimony compounds using anion exchange chromatography technique Herlinawati Herlinawati; Buchari Buchari; M. Bachri Amran
Jurnal Pendidikan Kimia (JPKim) Vol 12, No 3 (2020): December
Publisher : Pascasarjana Universitas Negeri Medan

Separation of Sb (V) and Sb (III) antimony compounds using anion exchange chromatography technique have been done. To obtain the separation of Sb (V) and Sb (III) antimony compounds which is good in this study have been studied several parameters of separation in anion exchange chromatography technique. Parameters that influence the process of separation of Sb (V) and Sb (III) antimony compounds is the concentration and pH of the mobile phase (eluent) have been evaluated. The separation of Sb (V) and Sb (III) antimony compounds is good and optimum obtained using an eluent 200 mM phosphate buffer at pH 7 with a flow rate of 1 mL/min. Based on the optimum conditions for the separation of Sb (V) and Sb (III) antimony compounds with anion exchange chromatography method has generated value the capacity factor (k ') Sb (V) and Sb (III) obtained are respectively 1.77 and 3.01. While the value of selectivity (α), Number of theoretical plates (N) and Resolution (Rs) obtained are respectively 1.70; 369.48; and 1.48.Keywords: Anion exchange chromatography, Capacity factor, Eluent, Resolution, Selectivity

Analysis of Fe metal adsorption in industrial wastewater using adsorbents from betel nut skin Herlinawati Herlinawati; Junifa Layla Sihombing; Agus Kembaren; Lisnawaty Simatupang; Rika Adhani
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 1 (2023): April
Publisher : Pascasarjana Universitas Negeri Medan

This study aims to determine the adsorption ability of betel nut skin-activated carbon on Fe metal in industrial wastewater. Betel nut skin carbon is activated using H2SO4 and HNO3. To identify the quality of adsorption using betel nut skin adsorbents, carbon and activated carbon are characterized using XRD and BET analysis. To determine the concentration of Fe metal adsorbed in the adsorption process, it was analyzed using AAS by determining the optimum conditions for the adsorption of Fe metal from the adsorbent using mass and contact time variations. The XRD characterization results show that betel nut skin carbon activated with sulfuric acid has a higher degree of crystallinity (41.03%) than that activated with nitric acid (20.61%). Betel nut skin activated carbon has a larger pore size of 3.2110 nm than the pore size of betel nut skin carbon of 2.2644 nm. The optimum condition of activated carbon on the adsorption of Fe metal was obtained at a mass of 1 gram with an optimum contact time of 45 minutes. The adsorption capacity of betel nut skin-activated carbon obtained was 1.4174 mg/g and the adsorption efficiency of betel nut skin-activated carbon was 99.84%. The initial concentration of Fe metal obtained was 25.86 ppm, after adding activated carbon from betel nut skin is decreased the concentration of Fe metal obtained was 3.72 ppm. So, the ability of betel nut skin adsorbent to adsorb Fe metal in industrial wastewater was 22.14 ppm.Keywords: Activated carbon; Adsorption; Amorphous; Betel nut skin; Wastewater

PREPARASI DAN KARAKTERISASI ADSORBEN DARI BONGGOL JAGUNG YANG DISALUT NANOKITOSAN DARI CANGKANG KERANG HIJAU Efi Febiola Siburian; Herlinawati Herlinawati
EDUPROXIMA : Jurnal Ilmiah Pendidikan IPA Vol 5, No 2 (2023)
Publisher : Universitas Bhinneka PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29100/.v5i2.4124

Penelitian ini bertujuan mengetahui karakteristik adsorben yang dibuat dari karbon aktif yang disalut dengan nanokitosan dari cangkang kerang hijau. Penyediaan adsorben dilakukan dengan metode penyalutan. Hasil karakterisasi FTIR menunujukkan adanya gugus N-H miliki kitosan pada bilangan gelombang 3400,33 cm-1. Karakterisasi BET memberikan hasil luas permukaan karbon sebesar 23.241 m2/g, luas permukaan karbon aktif 14.395 m2/g dan luas permukaan karbon aktif disalut nanokitosan 65.626 m2/g. Volume pori karbon juga mengalami perubahan yaitu karbon sebesar 0.041 cm3/g, karbon aktif sebesar 0.033 cm3/g dan karbon aktif disalut nanokitosan sebesar 0.065 cm3/g. Hasil penelitian menunjukkan bahwa sifat pori karbon aktif mengalami perubahan setelah penyalutan dengan nanokitosan yang berhubungan dengan daya serap karbon aktif.

Unveiling ZrO2/natural zeolite catalytic performance on hydrocracking palm oil mill effluent residue Junifa Layla Sihombing; Herlinawati Herlinawati; Ahmad Nasir Pulungan; Agus Kembaren; Gimelliya Saragih; Harmileni Harmileni; Rahayu Rahayu; Ary Anggara Wibowo
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.43324

Palm oil mill effluent (POME) is the largest liquid waste from crude palm oil production. This liquid waste still contains a lot of chemical components, solid deposits, and oil which is dangerous if released directly into the environment. The residual oil and grease components contained in POME can be further extracted and converted into fuel fractions. This study investigates the conversion of residual oil from POME into fuel fractions through hydrocracking. A ZrO2/Sarulla natural zeolite (SNZ) catalyst was used, characterized by a particle size of 1-1.5 µm, a surface area of 73.3 m2/g, a pore volume of 0.161 cc/g, and a pore diameter of 3.35 nm. The effect of catalyst mass was studied, with the total conversion increasing to a certain extent with increasing catalyst mass, however, an increase in coke formation decreased the product yield. The highest gasoline fraction selectivity was obtained with a catalyst mass of 0.09 wt% (~42%), while the kerosene fraction was most obtained with a catalyst mass of 0.15 wt% (~40%). The liquid product with a catalyst mass of 0.15 wt% had the highest HHV of 44.2 MJ/kg, a 12% increase from the HHV of POME oil residue (39.4 MJ/kg). The results demonstrate the potential of using residual oil from POME as a source for fuel production and the use of natural zeolite-based catalysts as hydrocracking catalysts.Keywords: Biofuel; Hydrocracking; Natural zeolite; Oil extracted; Palm oil mill effluent

Kinerja Ratio Silika-Cat Dengan Metode Dipcoating Pada Permukaan Logam Untuk Penghambat Laju Korosi Lisnawaty Simatupang; Rikson Siburian; Elfrida Ginting; Junifa Layla Sihombing; Herlinawati Herlinawati; Alex Suhendra Munte; Kristian Adinata Pratama Simatupang; Dea Gracella Siagian
Journal of Science and Applicative Technology Vol 7 No 1 (2023): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i1.1311

Silica oxide (SiO2) is a chemical compound that can be obtained from the extraction of volcanic ash from Mount Sinabung. Silicon dioxide has the properties of high porosity, high mechanical strength, high thermal stability, large pore surface area, stable surface in acidic media so that it can be applied in the chemical coating field.This research aims to measurement of performance natural silica from volcanic ash of mount Sinabung Indonesia as additives to the paint to inhibit corrosion rate in metal surface. The addition of silica additives to the paint was carried out by dispersing (0; 0.5; 0.75; and 1) g with 10 mL of paint with each composition carried out for 60 minutes. Iron plate in sandpaper with 1500 grid and polished with bludru cloth using autosol metal polish, then coated with paint and a combination of silica-paint through the dipcoating method. The corrosion test was carried out on a corrosive solution of HCl 15% (v/v) and NaCl 3.5% (w/v). The corrosion rate using HCl 15% (v/v) showed C (0,286) mpy, SC1 (0,123) mpy, SC2 (0,149) mpy, SC3 (0,120) mpy. While at 3.5% (w/v) NaCl, namely C (0,282) mpy, SC1 (0,120) mpy, SC2 (0,142) mpy, SC3 (0,098) mpy. Inhibitor efficiency for various variations of silica composition in corrosive HCl 15%(v/v) solution, e.g., SC1 (56,9%), SC2 (47,9%), and SC3 (58,04%). The inhibitor efficiency at various compositions of silica in NaCl 3.5% (w/v) are SC1 (57,44%), SC2 (49%) dan SC3 (65,24%).

Co-Authors Agus Kambaren Agus Kembaren Ahmad Nasir Pulungan Alex Suhendra Munte Ani Sutiani Ary Anggara Wibowo Buchari Buchari Dea Gracella Siagian Deri Salsalina Br Sitepu Dewi Endriani Efi Febiola Siburian Ginting, Elfrida Gulmah Sugiharti Hafni Indriati Nasution Harmileni Irfandi Irfandi Junifa Layla Sihombing Junifa Layla Sihombing Junifa Layla Sihombing Kristian Adinata Pratama Simatupang Lisnawati Simatupang Lisnawaty Simatupang M. Bachri Amran Magdalena E Manik Makharany Dalimunthe Mukti Hamjah Harahap, Mukti Hamjah Rahayu Rahayu Rika Adhani Rikson Siburian Rudi Salman Rudi Salman Saragih, Gimelliya Simatupang, Lisnawaty Susilawati Amdayani Syuhada, Feri Andi Weny Widianty

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