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All Journal Journals Mining Engineering : Bina Tambang Jurnal Periodic Jurusan Kimia UNP Sainstek Jurnal Riset Kimia SEMIRATA 2015 Indonesian Journal of Chemical Science Indonesian Journal of Chemistry JURNAL EKSAKTA PENDIDIKAN (JEP) JURNAL PENDIDIKAN TAMBUSAI Menara Ilmu Jurnal Farmamedika (Pharmamedica Journal) Pelita Eksakta Sainstek : Jurnal Sains dan Teknologi Molluca Journal of Chemistry Education (MJoCE) Hydrogen: Jurnal Kependidikan Kimia PRIMER (Prima Medical Journal) CHEDS: Journal of Chemistry, Education, and Science Jurnal Pijar MIPA MASALIQ: Jurnal Pendidikan dan Sains Menara Pengabdian Jurnal Pengabdian Pada Masyarakat Gudang Jurnal Multidisiplin Ilmu Jurnal Sains dan Kesehatan Jurnal Pendidikan Kimia, Fisika dan Biologi
Edi Nasra
Universitas Negeri Padang
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PENGOLAHAN TEMBAGA (Cu) DALAM SAMPEL BATUAN MENGGUNAKAN METODE EKSTRAKSI PELARUT KELAT DITIZON DENGAN VARIASI WAKTU DAN pH OPTIMUM Hendrawansyah Putra; Fadhilah Fadhilah; Edi Nasra
Journals Mining Engineering : Bina Tambang Vol 1, No 1 (2014): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (820.28 KB) | DOI: 10.24036/bt.v1i1.3499

Abstract

ABSTRAK  Penelitian mengenai pengolahan tembaga (Cu) dalam sampel batuan  menggunakan metode ekstraksi pelarut kelat ditizon dengan variasi waktu dan pH telah dilakukan.Sampel yang digunakan dalam penelitian ini adalah conto batuan yang berasal dari Kecamatan Bonjol, Kabupaten Pasaman, Sumatera Barat.Tujuan penelitian ini untuk mengetahui pengaruh pH dan waktu dalam pengolahan tembaga dengan menggunakan metode ekstraksi pelarut kelat ditizon. Kadar Logam tembaga (Cu) diukur dengan menggunakan alat Atomic Absorption Spectroscopy (AAS).Hasil yang didapat menunjukkan bahwa waktu pengolahan yang optimal terjadi selama waktu 10 menit, sedangkan pH pengolahan yang optimal terjadi pada pH 7. Kadar yang didapat jika menggunakan metode ektraksi pelarut kelat ditizon sebesar 1,60 ppm, sedangkan dengan  menggunakan pelarut asam didapat kadar rata-rata sebesar 0,45 ppm. Terjadi peningkatan recovery sebesar 3,5x apabila menggunakan metode ekstraksi pelarut kelat ditizon. Keywords : Tembaga (Cu), pH optimum, waktu optimum, Pengolahan ABSTRACT The research about copper (Cu) processing of the rock sample using the chelating dithizone solvent extraction  method by time and pH variation has been done. The sample used in this research is rock sample taken from Bonjol sub-district, Pasaman district, West Sumatera.The purpose of this research is to find out the influence of pH and time in copper processing by using chelating dithizone solvent extraction  method by time and pH variation. The content of copper (Cu) metal measured by using Atomic Absorption Spectroscopy (AAS).The result shows that 10 minutes are the optimum time to proceed. Meanwhile 7 is the optimum pH to proceed. The average content can be obtained by using 1. 60 ppm chelating dithizone solvent extraction method, meanwhile by using acid solvent 0. 45 ppm the average content can be obtained. The content increases as big as 3.5x by using chelating dithizone solvent extraction method. Key words: Copper (Cu), pH Optimum, Time Optimum, Processing.
Improvement of MGMP Chemistry Teacher Competency in 50-Kota Districts on OSN Preparing Students Edi Nasra; Sri Benti Etika; Desy Kurniawaty; Bahrizal Bahrizal; Eka Yusmaita
Pelita Eksakta Vol 2 No 2 (2019): Pelita Eksakta Vol. 2 No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol2-iss2/46

Abstract

Training in increasing the competence of MGMP Chemistry teachers in 50 City Regencies in preparing students for the National Science Olympiad (OSN). The activity began with filling out a questionnaire for the readiness of the teachers in the learning process and pre-test to see the initial abilities of the MGMP Chemistry teachers in the City 50 District. After training in strengthening chemical materials and discussing HOTS questions in the fields of Analytical Chemistry, Organic Chemistry, Inorganic Chemistry, Physical Chemistry and Biochemistry, a post test was conducted to evaluate the achievement of the objectives of the activity. From the questionnaire given at the beginning of the activity it can be concluded that in general the teachers were ready for learning even though they were not used to the HOTS questions of the Olympic type questions. This is directly proportional to the pre-test results with an average value of 3.625 (scale 10). After the training of the teachers there was a significant increase which was shown by the results of the post test with an average of 5.5 (scale 10). As an evaluation material, at the end of the activity the satisfaction questionnaire was distributed and the results obtained were an average of a questionnaire of 3.47 (scale 4). Generally teachers complain about the lack of training time so that the absorption of the material provided is quite low.
Counseling on The Technology of Processing Quail Feces Waste into Biogas in Mungka District, Lima Puluh Kota Regency Trisna Kumala Sari; Syamsi Aini; Edi Nasra; Riga Riga; Edwina Zainal
Pelita Eksakta Vol 4 No 2 (2021): Pelita Eksakta Vol. 4 No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol4-iss2/161

Abstract

The people of Jorong Padang Koto Tuo, Mungka District, Lima Puluh Kota Regency are increasingly enthusiastic about quail farming. The more developed the livestock business, the more manure is produced. This will certainly become a serious environmental problem, if not immediately followed up. Therefore, it is necessary to take action to treat this manure, including the use of appropriate technology for processing quail manure into biogas and fertilizer. This activity focused on educating the people of Jorong Padang Koto Tuo, Mungka District, Lima Puluh Kota Regency regarding the processing of quail waste into biogas as an alternative energy source that is environmentally friendly and inexpensive, starting from the tools, how the stages of work, what processes occur and the products produced. This activity not only has a good impact on the environment, but the resulting product can be used as a substitute for LPG gas. The people looks enthusiastic in participating in this activity.
Development Study and Effectiveness of Online Data Based Scientific Writing Model Using Endnote Application for MGMP Chemistry Teachers Padang Panjang City Rahadian Zainul; Budhi Oktavia; Edi Nasra; Visca Alisia Arianti; Putri Fatimah; Yulia Mona Liza; Trihanto Setiadi
Pelita Eksakta Vol 2 No 2 (2019): Pelita Eksakta Vol. 2 No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol2-iss2/43

Abstract

In writing scientific work, a work system is needed online (online) so that the search process is fast and accurate. The online data-based writing model with endnote application is an alternative model of scientific writing that can be applied to school teacher teachers and lecturers. The purpose of this study was to develop a model of scientific writing and measure the effectiveness of its application to MGMP Chemistry teachers in Padang Panjang City. The method used is the development of the ADDIE model and the success test with CV (Coefficient of Variations). Implementation is carried out on all Chemistry teacher teachers who are members of the Padangpanjang City Chemical MGMP. Each teacher will receive training and assistance in creating an Online Library as a database. The training continued with the application of the preparation of scientific works based on student learning outcomes data in each school. From the results of the study, it was found that the level of ease in literacy and compilation of scientific work reached 70% SS and 30% S. The level of interest of Master in compiling scientific work with Endnote reached 30%. SS san 70% S. The desire of participants to start compiling scientific work reaches 20% US, 60% S and 20% SS. The training effectiveness test found that the coefficient of variation had decreased from 2.75% to 1.63%, so it could be concluded that the model for the preparation of scientific work was successfully applied to the Teachers of the Padangpanjang Chemical MGMP.
Enrichment of Material and Training for Solving Chemistry Olympiad Questions for Teachers at SMAN 1 Ampek Angkek Desy Kurniawati; Eka Yusmita; Edi Nasra
Pelita Eksakta Vol 4 No 2 (2021): Pelita Eksakta Vol. 4 No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol4-iss2/149

Abstract

One indicator of the success learning process in schools is the success of students in academic competitions such as the National Science Olympiad (OSN). This training aims to improve the ability of Chemistry MGMP teachers in Agam district in understanding the material and mastering problem-solving strategies in solving high school level Chemistry OSN questions. In addition, this training is expected to help teachers prepare their students to face OSN Chemistry. The number of teachers who took part in the chemistry olympiad interview and training activity were 18 participants who were chemistry teachers throughout Agam district. The stages in this training consist of (1) literature study on inorganic, analytical, organic, and physical chemistry materials, (2) preparation of training materials in the form of Chemistry Olympiad modules, (3) training implementation which consists of presenting material and mentoring to participants. In solving practice questions, (4) implementing teacher evaluation activities through pre and post test activities on chemistry olympiad questions. Based on the evaluation of the teacher's pre and post test scores, it was found that the posttest results increased with an average value of 47.9 while the pretest score had an average value of 34.72.
Sintesis Mg2+ Doped ZnO dengan Penambahan Albumen Ayam Ras Menggunakan Gabungan Metode Sol-Gel dan Sonokimia Sherly Kasuma Warda Ningsih; Umar Kalmar Nizar; Bahrizal Bahrizal; Edi Nasra; Siti Fatimah Mutiara R
Jurnal Riset Kimia Vol. 12 No. 1 (2021): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i1.374

Abstract

Mg2+ doped ZnO has been successfully synthesized using a combination of sol-gel and sonochemical methods. Zinc acetate dihydrate was used as a precursor, magnesium chloride hexahydrate as a source of Mg dopant, methanol as a solvent, and chicken albumen was used as an additive to replace monoethanolamine. The sol was heated at 110 °C for 1 hour. The gel formed was calcined at 600 °C for 3 hours. FTIR analysis shows that the absorbance band around 400-450 cm-1 indicates Mg-O stretching, the absorbance band around 500-550 cm-1 indicates Zn-O stretching, the absorbance band around 400-550 cm-1 shows Zn-O-Mg bonds. Mg. Measurements with UV-DRS, obtained the smallest ZnO band gap value doped Mg2+ around 2.7 eV with the addition of 10 mL albumen. The resulting crystal structure was wurtzite with crystal size with the addition of 10, 20, 30, 40 and 50 mL albumen were 25.22-55.91 nm, 32.99-75.87 nm, 45.92-83.91 nm, 45.92-75.89 nm and 46.15-71.47 nm respectively. SEM photo of Mg2+ doped ZnO with the addition of 10 mL of albumen has a hexagonal surface morphology.
Pengaruh Waktu Reaksi Produksi Biodiesel dengan PFAD Menggunakan Katalis Karbon Kulit Ubi Kayu Tersulfonasi Miranda Dwi Putri Gultom; Umar Kalmar Nizar; Edi Nasra; Desy Kurniawati
PRIMER (Prima Medical Journal) Vol. 6 No. 2 (2021): Edisi Oktober
Publisher : Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34012/pmj.v4i2.1952

Abstract

Katalis karbon kulit ubi kayu dapat digunakan dalam produksi biodiesl dari PFAD. Katalis ini digunakan karena mudah dipisahkan dengan produk biodiesel yang dihasilkkan dan dapat digunakan kembali. Produksi biodiesel dilakukan dengan variasi waktu selama 1 jam, 2 jam, 3 jam dan 4 jam. Katalis dikarakterisasi dengan penentuan situs asam dan biodiesel yang dihasilkan di uji sifat fisika uji densitas, laju alir, bilangan asam dan %konversi. Penentuan situs asam pada katalis karbon kulit ubi kayu tersulfonasi menunjukkan nilai sebesar 1.21 mmol.g-1 yang menandakan bahwa proses sulfonasi berhasil dilakukan. Berdasarkan hasil pengujian sifat fisika biodiesel, nilai densitas, laju alir, dan bilangan asam secara berturut-turut adalah 0.8257 g/mL, 0.862 mL/s, 22.4 mgKOH/g. Hasil yang didaptkan ini, menunjukkan PFAD terkonversi menjadi biodiesel pada waktu reaksi selama 2 jam dengan %konversi sebesar 87,67%.
SOLID PHASE EXTRACTION PADA PENENTUAN HG (II) MENGGUNAKAN C-18 BERBASIS FLOW INJECTION ANALYSIS (FIA) Edi Nasra; M Bachri Amran
Molluca Journal of Chemistry Education (MJoCE) Vol 2 No 1 (2012): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol2iss1pp27-32

Abstract

Analisis merkuri dalam jumlah renik dapat dilakukan secara spektrofotometri UV-Vis yang didasarkan pada pembentukan kompleks assosiasi antara HgI42- dengan ferroin, Fe(phen)32+. Kompleks assosiasi memiliki serapan maksimum pada λ 512 nm dan feroin memiliki serapan maksimum pada λ 510 nm. Meskipun menyerap pada panjang gelombang yang relatif sama tapi feroin tidak teretensi pada kolom C18 yang bersifat hidrofobik sehingga tidak mengganggu prakonsentrasi merkuri. Pembentukan kompleks berlangsung optimum pada pH 4,5. Kompleks assosiasi teretensi pada kolom C-18 dengan kapasitas retensi 2,58 µg Hg2+/ g C-18 dengan menggunakan eluen metanol 9 mL. Kepekaan dan batas deteksi masing-masing diperoleh 0,136 µg/L dan 18,54 µg/L. Dari kinerja kinerja analitik yang diperoleh dapat disimpulkan bahwa metode ini dapat digunakan untuk analisis Hg(II) pada tingkat konsentrasi renik dalam sampel air
PERANCANGAN ASSESMEN LITERASI KIMIA DENGAN MENGGUNAKAN MODEL OF EDUCATIONAL REKONSTRUCTION (MER) PADA TEMA: “AIR SEBAGAI PELARUT UNIVERSAL” Eka Yusmaita; Edi Nasra
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 1 No 2 (2017): JEP : Jurnal Eksakta Pendidikan
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep.v1i2.66

Abstract

This research aims to produce instrument for measuring chemical literacy assessment in basic chemistry courses with theme “water as a universal solvent”. The construction of this measuring instrument is adapted to the PISA (Programme for International Student Assessment) problem’s characteristics and the Syllaby of Basic Chemistry in KKNI-Indonesian National Qualification Framework. The PISA is a cross-country study conducted periodically to monitor the outcomes of learners' achievement in each participating country. So far, studies conducted by PISA include reading literacy, mathematic literacy and scientific literacy. Refered to the scientific competence of the PISA study on science literacy, an assessment designed to measure the chemical literacy of the chemistry department’s students in UNP. The research model used is MER (Model of Educational Reconstruction). The validity and reliability values of discourse questions is measured using the software ANATES. Based on the acquisition of these values is obtained a valid and reliable chemical literacy questions. There are four question items limited response on the theme with valid category, the acquisition value of test reliability is 0,60 and has a difficulty index and distinguishing good
Synthesis of Cu2+ Doped ZnO by the Combination of Sol-Gel-Sonochemical Methods with Duck Egg Albumen as Additive for Photocatalytic Degradation of Methyl Orange Sherly Kasuma Warda Ningsih; Hary Sanjaya; Bahrizal Bahrizal; Edi Nasra; Syuhada Yurnas
Indonesian Journal of Chemistry Vol 21, No 3 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.57077

Abstract

Cu2+ doped ZnO by green synthesis was successfully prepared by using a combination of the Sol-Gel-Sonochemical method. Duck egg albumen was used as an additive, a substitute for chemical additives, such as monoethanolamine (MEA) and diethanolamine (DEA). Zn(CH3COO)2·2H2O was used as a precursor, Cu(CH3COO)2·H2O was used as a dopant source with concentrations of 5 wt.%, and isopropanol was used as the solvent. The addition of albumen variations was 10, 20, 30, 40, and 50 mL. The prepared catalyst was applied for the degradation of the methyl orange dyes by using photosonolysis with variations of the degradation time of methyl orange for 30, 60, 90, 120, 150, 180, and 240 min. FTIR spectra showed stretching at 400–550 cm–1 indicating the presence of Zn–O and Zn–O–Cu metal oxides. The optimum bandgap energy value was 2.82 eV with the addition of 30 mL of albumen. XRD analysis showed the optimum particle size of 16.62–53.21 nm after adding 30 mL of additives. The SEM image showed a spherical shape with an average diameter of 2.7 μm. The optimum percentage of degradation obtained was 94.88%, with the irradiation time under UV light for 210 min.
Co-Authors Adam, Wahyu Ade Elsa Betavia Adia Silvani, Mauline Afriani, Reza Ahmad Raisan R.P Aini, Syamsi Ali Amran Ali Amran Alizar Alizar Alizar, Alizar Amrin . Amrin Amrin Amrin Amrin Ananda Putra Ananda Putra Andini, Namira Tri Anjelia, Mariza Annisa Haqqu Azhma Ulya Bahrizal Bahrizal Bahrizal Bahrizal Bahrizal Bahrizal Bahrizal Bahrizal Bastian, Vadianda Benti Etika, Sri Berlian, Syakhinah Berliana Salsabila Budhi Oktavia Burma, Resna Chairunnisa Chairunnisa Chindikia, Ilmy Cynthia Dela Gustika Della Rosalynna Stiadi Desi Kurniawati Deski Beri Deski Pahdinol Desy Kurniawati DESY KURNIAWATI Desy Kurniawati Desy Kurniawati Desy Kurniawati Desy Kurniawati Desy Kurniawaty Deva Indriyani Devi Lestari Dewi Kristina Dewi Meliati Agustini Dini Anggraini, Dini Dony Yulvi Dwi Hartati Dwi Rahma Doni, Deani Edwina Zainal Eka Yusmita Elvina Elvina Fadhilah Fadhilah Fadilla Yuri Merti Fadli, Sukma Bening Fahilatul Syukro Fajriah Azra Fatimah Jora Fatimah Mutiara R, Siti Fatmawati, Rani Fauzan Aulia Akbar Febbi Rahmayuni Febri Andini Putri Fitri Amelia Fitria, Fadhila Geita Yulyan Firel Haqqu, Annisa Hardeli Hardeli Hardeli Hardeli Hary Sanjaya Hary Sanjaya Hary Sanjaya Hayuni, Sri Heditama, Muhammad Raffi Hendrawansyah Putra Hesty Parbuntari Ikhsany, Diva Indang Dewata Isnaeni Isnaeni Jayawarsa, A.A. Ketut Juli Manda Sari Kalmar Nizar, Umar Kasuma Warda Ningsih, Sherly Khairiyah, Ghina Khalisa Khalisa Laura Dwi Rha Hayu Lismawati, Maya M Bachri Amran M. Iqbal S.G Malinda, Tasya Mauline Adia Silvani Melida Selvita Miftahul Khair Minda Azhar Miranda Dwi Putri Gultom Monika Yulia Mufi Nasda Muhamad Daviya Nur Fauzi Muhammad Farhan Muhammad Patly Muhammad Satrio Hutomo Mulia, Melindra Mutia, Nuraini Cut Nandi, Mila Lusy Tri Nesya Febi Utami Nizar, Umar Kalmar Nofri Yuhelman Nugraha, Putri Nur Hafni Hasibuan Nur Meisinca, Dzulhijjah Nuzulia Yona Oktavia Dewita, Febby Oktria, Wandi Patricia, Popi Pebriani Pebriani Pernadi, Niza Lian Pratama, Rafy Putra, Ananda Putri Fatimah Putri Nugraha Putri, Anisa Dwi Putri, Riska Himaylia Putri, Sinta Eka R, Yoanatul Hasanah Raden Mohamad Herdian Bhakti Rahadian Zainul Rahayu, Yanna Rahmad, Nafisah Yulia Rahmatika, Aljumaatul Rahmi, Fathaniah Raviqa Ranti Septiana Ridho Hermawan Riga Riga Riga, Riga Riva Silvia Romy Dwipa Yamesa Away Roza Herlina Sabrina, Joya Saddam Husein, Saddam Sari, Trisna Kumala Satrio Prinandito Septian Budiman Serli, Salsabilla Putri Sherly Kasuma Warda Ningsih Sherly Kasuma Warda Ningsih Sherly Kasuma Warda Ningsih Sintha Hafizhah Yonel Siti Fatimah Mutiara R Sri Benti Etika Sri Benti Etika Suryani, Okta Sutan M Razali Syamsi Aini Syuhada Yurnas Taufik Hidayat Tessa Faradilla Tri Nandi, Mila Lusy Trihanto Setiadi Trisna Kumala Sari Umar Kalmar Nizar Umar Kalmar Nizar Umar Kalmar Nizar Umar Kalmar Nizar Velly, Aglin Visca Alisia Arianti Wandi Oktria Widya Pasema Yeni, Isra Yeniwati Yeniwati Yollafebrisa Wizul Yollafebrisa Wizul Yulia Mona Liza Yusmaita, Eka Yusuf . Zonalia Fitriza Zul Afkar