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All Journal Jurnal Pendidikan dan Pemberdayaan Masyarakat Alotrop Jurnal Pendidikan dan Ilmu Kimia PENDIPA Journal of Science Education Jurnal Teknodik Hydrogen: Jurnal Kependidikan Kimia TRIBUTE: JOURNAL OF COMMUNITY SERVICES
Rina Elvia
FKIP Universitas Bengkulu
Humanities Chemistry Computer Science & IT Education Languange, Linguistic, Communication & Media Mathematics Social Sciences

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Journal : Alotrop Jurnal Pendidikan dan Ilmu Kimia

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PEMANFAATAN SILIKA DARI PASIR PANTAI LINAU UNTUK MENGURANGI KADAR AMMONIUM DALAM LIMBAH CAIR TAHU Chrisnia Nurbaiti; Rina Elvia; I Nyoman Chandra
ALOTROP Vol 2, No 2 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i2.7480

Abstract

The purpose of this study was to synthesize silica from Linau beach sand and its application as an adsorbent in reducing ammonium content in tofu liquid waste. Silica synthesis was carried out using the Sol-gel method using raw materials of 20 grams of refined sand, by dissolving sand into 160 mL NaOH 4 M while being heated and stirred constantly at 1050C for 90 minutes, and then filtered using filter paper. The residue obtained was calcined at 500oC for 30 minutes. The solid obtained is dissolved into 200 mL aqua DM so that it becomes a sodium silica solution. The sodium silicate solution was obtained, then added 1 M HCl solution drop by drop until it was obtained pH 7, and then left for 18 hours until a gel was formed and continued with washing using aqua DM and filtered with filter paper. The gel obtained was then dried at 1050C for 8 hours in the oven to obtain silica powder. Silica redemen produced from silica synthesis from Linau beach sand was obtained at 0.405%. The results showed that the synthesis silica from Linau beach sand was able to reduce ammonium content in tofu wastewater with the yield parameters in the form of tofu waste content decreasing at optimum mass 0, 25 grams, contact time 15 minutes with adsorption efficiency of 32.59%
PENENTUAN PARAMETER ADSORPSI SILIKA SINTETIK DARI CANGKANG KELAPA SAWIT TERHADAP KANDUNGAN AMMONIUM PADA LIMBAH CAIR TAHU Rizki Karimullah; Rina Elvia; Hermansyah Amir
ALOTROP Vol 2, No 1 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i1.4709

Abstract

[DETERMINATION OF SYNTHETIC SILICA ADSORPTION PARAMETERS OF OIL PALM SHELLS AGAINST THE CONTENT OF AMMONIUM ON LIQUID TOFU WASTE] This research aims to determine adsorption capacity of synthetic silica synthesized from Palm Oil (Elaeis guineensis Jacq) shells ashes against the content of Ammonium on tofu liquid waste . The shell sample soaked in a solution of HCl 10% for 2 hours, charred at a temperature of  300 °C for 3 hours ago ashed at 600 °C for 2 hours. Then ash soaked with HCl 1.2 M for 24 hours.  Taken 120 g of ash shells and then mixed right while heated with 160 mL 4 M NaOH. The residue obtained is heated at a temperature of 5000 °C  for 30 minutes, cooled to room temperature and retrieved the Na2SiO3 particle.The particle then  dissolved into 200 ml aquademin and settled at 12 hours, filtered and filtratnya ditetesi with HCL 1 M while stirring, until the white gel is formed and settled in the next 24 hours, filtered, and dried at a temperature of 120 °C for 2 hours, an silica powder obtained as result.  Ammonium Adsorption is done with mass variation 0125, 0.25, 0.5, 0.75, and 1 g silica as well as variations of the contact time of 15, 30, 60, 90, and 120 minutes. The results showed Ammonium adsorption at tofu liquid waste by silica synthesis from the Palm Oil shell ashes occurs with a maximum mass of 0.25 g and optimum contact time of 30 minutes with a capacity of adsorption of 2.581 mg/L and 3,154 mg/L as well as with adsorption efficiency at  61.9% and 76.8%.
Preparasi dan Karakterisasi Katalis Mo-Ni/HZ dengan Metode Impregnasi untuk Cracking Katalitik Minyak Limbah Cair Pengolahan Kelapa Sawit menjadi Bahan Bakar Nabati Shinta Lestari; Agus Sundaryono; Rina Elvia
ALOTROP Vol 3, No 1 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i1.9047

Abstract

This study aims to determine the characteristics of Mo-Ni/HZ catalysts and test the ability of Mo-Ni/HZ catalysts in converting vegetable oils into biofuels through catalytic cracking reactions.Catalyst preparation is carried out by the impregnation method which begins with activation of natural zeolite.Impregnation is carried out by dissolution, reflux, filtration, drying and calcination.Catalyst characterization included the determination of the distribution of metals in zeolites using IR spectroscopic analysis and total acidity of the catalyst by ammonia adsorption gravimetric method.Preparation of samples prior to cracking is heating, degumming and bleaching.Catalytic cracking was carried out at 280oC using Mo-Ni/HZ catalyst for 100 minutes.The constituent components of the cracking results were analyzed by GC-MS and IR spectroscopy.The results obtained from the catalytic cracking process were then determined by physical characteristics which included density, viscosity, fog point and pour point test.Based on the shift of wave number in IR spectroscopy, it can be concluded that the Ni and Mo metals are embedded in the HZ.This Mo-Ni/HZ catalyst has total acidity of 8.39 mmol/gammonia.The results of the study prove that the Mo-Ni/HZ experiment proved to be able to crack oil frompalm oil processing wastewater by 91.46% to composition C=O ester CH aliphatic.The physical characteristics of cracking productshave parameters density of 0.93 g/cm3, a viscosity of 26.60 cSt, a fog point of 15oC and pour point of 11.67oC.
PERBANDINGAN HASIL DAN MINAT BELAJAR KIMIA SISWA KELAS X IPA MENGGUNAKAN MODEL PEMBELAJARAN KOOPERATIF SNOWBALL THROWING DAN TALKING STICK PADA KURIKULUM-2013 DI SMAN 10 KOTABENGKULU Rika Juwita Saputri; Sumpono Sumpono; Rina Elvia
ALOTROP Vol 2, No 2 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i2.7489

Abstract

The purpose of this research to determine the difference in learning outcome and interest of students on chemistry learning between class which applied snowball throwing and class which applied talking stick learning model on nomenclatur of  chemical compounds material in curriculum-2013 of  grade X IPA in  SMA Negeri 10 Bengkulu City. Research conducted is a research with the type of quasi experiment. Analysis of the data used are mean values, normality test, homogeneity test, and t-test. Chemistry learning outcome data obtained pretest and posttest value where average improvement value of cognitive learning result for snowball throwing class and talking stick class are 56,970 and 45,606. While the interest of students learning of  both experiment classes procure percentage are 81,567% and 75,373%. The result of t test with significant level (? = 0,05), then got value for tcount   >ttable is 4,734 > 1,669 for learning result and 3,596 > 1,669  for interest learning. The results showed that there were significant differences in learning outcomes and learning interest between classes that applied snowball throwing learning and classes that applied the talking stick learning model.
PENGEMBANGAN E-MODUL KIMIA BERBASIS METAKOGNISI MENGGUNAKAN APLIKASI EDMODO Shiba Meike Indira; Agus Sundaryono; Rina Elvia
ALOTROP Vol 4, No 1 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i1.13707

Abstract

Metacognition is one of the factors that influence academic achievement, so it is very important in each student's learning activities. The objective of this research was to find out the level of feasibility and students response to E-chemistry-based metacognition using the edmodo application as teaching material to train students' knowledge and metacognition experience of students of the XI MIPA class of SMA Negeri 2 Kota Bengkulu T/P 2018/2019 on acid-base material. This research was an Research & Development (R&D) using the 4D development model limited to the development stage. The development of this emodule uses the edmodo application and in its using the flipped classroom learning model. Information worthy of being used as teaching of expert assessments and student responses to limited testing and field testing. The assessment of e-module was carried out by media experts, it was obtained that e-module is very feadible to use without revision with an evaluation percentage of 93%, an assessment by material experts and practitioners ( chemistry teacher) was very feasible to use without revision with an evaluation percentage of 92%, then the metacognition –based was assessed by material experts was obtained e- module was very feasible to use without revision with a percentage of 88% so that based on the results of expert evaluations, e-module could testedon a limited trial class and field trial. Sample selection in limited trials and field trials obtained from the results of normality tests conducted on january 3,2019 from the popuation of class XI Mipa A- XI Mipa F as many 190 students obtained 15 students XI Mipa C as samples ini limited trials and 31 students XI Mipa E in the field trial. Response of students in limited trials carried out on january 14,2019 and field tests on january 30,2019 amounting to 86% and 84% this shows that the use of emodules is very teasible to use as teaching materials and obtained information that e-module can train the ability of metacognition students of the XI MIPA SMA Negeri 2 Kota Bengkulu T/P 2018/2019 in particular the knowledge and metacognition experience of student from less trained to being trained.
PENGEMBANGAN BUTIR SOAL HOTS UNTUK MENGUJI KEMAMPUAN BERPIKIR TINGKAT TINGGI SISWA DI MA NEGERI 2 KOTA BENGKULU Pangesti Dewi; Rina Elvia; Elvinawati Elvinawati
ALOTROP Vol 5, No 2 (2021)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v5i2.17119

Abstract

Co-Authors Ahmad Fadli Zil Ikram Amrul Bahar Angga Aprian Dinata Anisa Rosmalara Areski Febriani Budiyanto Budiyanto Chrisnia Nurbaiti Citra Dwi Palenti Desy Purnama Sari Dewi Handayani Elfrida Napitupuluh Elvinawati Elvinawati Febrian Solikhin Fepri Effendi Finni Meyori Fitri Esa Madina Ghea Sefriza Pratiwi Hendry Nordan Hermansyah Amir I Nyoman Candra I Nyoman Chandra Intan Fadila M. Lutfi Firdaus Mantiko Parbo Maulana Maya Riski Andraini Mia Maysella Aditia Muzanip Alperi Nadia Amida Nurhamidah Nurhamidah Nurhamidah Nurlia Latifah Pangesti Dewi Pepi Pepi Rangga Putra Rika Juwita Saputri Rita Handayanti Rizki Karimullah Rovi Atahilah Salastri Rohiat Salastri Rohiat Shiba Meike Indira Shinta Lestari Siti Zaya Aisyahlika Sumpono Sumpono Sura Menda Ginting Weny Shintia Yola Dewi Putri