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All Journal Jurnal Periodic Jurnal Pendidikan MIPA Science and Technology Indonesia Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemical Science and Technology CHEDS: Journal of Chemistry, Education, and Science International Journal of Innovation in Mechanical Engineering and Advanced Materials

Ananda Putra

Department Of Chemistry, Faculty Of Mathematics And Natural Science, Universitas Negeri Padang, Padang, 25131, Indonesia

Author-ID : 5345657

Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Optimasi pH dan Ukuran Partikel Karbon Aktif dari Kulit Pisang Kepok (Musa balbisiana Colla) Terhadap Penyerapan Zat Warna Methylene Blue Ridho Hermawan; Edi Nasra; Ananda Putra; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Methylene blue is one of the textile industry wastes which can cause pollution to aquatic ecosystems. The threshold value for the permissible concentration of methylene blue in ambient waters (5-10) mg / L. So we need a method to treat wastewater contaminated with dye so that it is safe to dispose of and does not pollute the environment. One of the effective methods for removing dye waste is the adsorption method. The purpose of this study was to determine the optimum absorption conditions and maximum absorption capacity of methylene blue using activated carbon from the peel of a banana (Musa balbisiana Colla). In this study, using the Bacht method to adsorb methylene blue dye by varying the pH and stirring speed. The results of this study showed that the absorption capacity at the optimum conditions of pH 6 and a particle size of 250 µm was 5.4096 mg / g and the absorption percentage was 86.54%.

Penentuan Kondisi Optimum Penyerapan Anion Kromat Pada Silika Termodifikasi Dimetilamina Vivi Chaniasi; Budhi Oktavia; Indang Dewata; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Heavy metal is the most dangerous was for the ecosystem because is not biodegradable, toxic, and carcinogenic even in a low concentration (ppm). It usually experienced some conditions such as not dissolved, precipitated, fused, absorbed, anorganic, reducer, oxidize, and free metal. One of the heavy metals that can cause negative effects for human and other living creature is Kromium Ion. The waste of the usage of Krom can damage the environment. Krom is a heavy metal that has dangerous affects that we have to be aware of. Krom (VI) on water was found 2 form od specieses, as an anion (Cr2O7)2- (In Acid solution) and anion (CrO4)2- (In Alkaline solution). One of the ways how to overcome Krom in a waste is by absorb it with an adsorbent, modified Silica DMA. It characterized with an electron microscope scanning, infrared spectrum, K2CrO4 adsorption from liquid solution which investigated in some pH level, contact time, K2CrO4 first concentration. The result of the experiment shows that modifying silica with DMA increases the adsorption capacity for Kromat. Langmuir Isotherm Adsorption resulting regression coefficient on Silica R2=0,8488, and for the modified Silica R2=0,9054. Kromat maximum adsorption capacity on 1,255 mg/g Silica and 2,26 mg/g modified Silica with first concentration of K2CrO4 100 mg/L can be reach on pH 2 with 90 minutes mixing process.

Kelarutan Zat Warna Organik dalam Gelasi Mikroemulsi Water In Oil Sistem Air, Surfaktan Nonionik Tween 60 dan Sikloheksana Aulia Rahmi; Hary Sanjaya; Fitri Amelia; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Organic dyes can be dissolved in the gelation of water in oil (w/o) microemulsion of the system of water (pH=4,5 and pH=9,5), nonionic surfactan tween 60 and cyclohexane. The purpose of this study was to prepare microemulsion gels using the sol-gel method, determine the solubility of organic dyes (turmeric and telang flower) in gelation, determine the value of density, refractive index of organic dyes in gelation microemultion (w/o) of the system of water, nonionic surfactan tween 60 and cyclohexane. Gel preparation was carried out using the sol-gel method at a temperature low using TEOS and ethanol which is hidrolyzed with water to form gel. Tetra ethyl ortho silicate which is added 1: 8 mol comparison to the amount of water in microemilsion of water in oil. Determination of value of the refractive index in this study using an ABBE refractometer. The result showed that the solubility of dye organic matter from turmeric and telang flower was 1,376% and 0,498% at pH 4,5 and 1,292% and 0,468% at pH 9,5. The density can be seen by the density test with the result of greatest density density is tumeric 0,87744 g/cm3 at pH 4,5 and 0,86836 g/cm3 at pH 9,5. Then measure the refractive index value, namely turmeric 1,4154 at pH 4,5 and 1,4274 at pH 9,5.

Penentuan Kondisi Optimum Pembentukan Natrium Silikat (Na2SiO3) Menggunakan Material Dasar Silika Alam dan Natrium Hidroksida (NaOH) Illa Ramadhani; Budhi Oktavia; Ananda Putra; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

The purpose of this research are to investigate the effective synthesis of sodium silicate and knowing the optimum conditions of the sodium silicate from its solubility in water. Synthesis of sodium silicate was carried out by first activating silica using 1M HCl. The activated silica is then added with NaOH. Based on XRF analysis, it was found that the sodium silicate synthesis method is more effective at high temperatures. Determination of the optimum conditions was carried out at various concentrations of NaOH (2M, 3M, 4 M, 5M and 6M). Based on the research that has been done, the optimum conditions for sodium silicate were obtained by adding NaOH with a concentration of 4M.

Degradasi Asam Humat Dengan Katalis TiO2/N Menggunakan Cahaya Matahari Syifa Rahma Ayunda; Rahadian Zainul; Budhi Oktavia; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Humic acid is a heterogeneous molecule of organic substance present in a peat water, which is carcinogenic is difficult to degrade. This study aims to degrade humic acid using the photocatalyst method is an environmentally friendly method. The photocatalyst used was TiO2 doped Nitrogen 8%. This study used reactor mobile hexagonal with variations in stirring speed, namely 500, 1000 rpm, and without stir with an irradiation time of 1 to 3 hours. Result of degradation analyzed using UV-Vis spectrophotometer. The degradation results obtained using strirring have a higher percentage of degradation than without strirring. The maximum degradation percentage obtained in this study was 76,27% with 500 rpm strirrings at 2 hours irradiation.

Development of Guided Discovery-Based e-Module on Colligative Properties to Improve Higher Order Thinking Skills of High School Students Nofrianto Nofrianto; Latisma Latisma; Desy Kurniawati; Ananda Putra
Jurnal Pendidikan MIPA Vol 23, No 3 (2022): Jurnal Pendidikan MIPA
Publisher : University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract The current condition of the Covid-19 pandemic is very influential on the learning process in schools so that a teaching material is needed that can increase the activity of students. This study aims to develop an e-module of colligative properties of solutions based on Guided Discovery Learning to improve Higher Order Thinking Skills (HOTS), as well as determine the level of validity, practicality and effectiveness of the developed e-module. This research and development uses the Plomp model which consists of 3 stages. The assessment instruments used are observation sheets, questionnaires, and learning outcomes tests. The e-Module was validated by six expert validators and tested on six students and 36 students at SMAN 14 Padang. The validity results of the e-module obtained an average value of Aiken's V of 0.84 with a very valid category. The results of e-module practicality by teachers and students obtained an average score of 0.90 and 0.88 with a very practical category. The results of the e-module learning effectiveness test obtained an average N-gain value of 0.691 with a moderate category Keywords e-module, guided discovery learning, higher order thinking skills, Plomp development model, colligative properties of solutions. Abstrak Kondisi pandemi covid-19 saat ini sangat berpengaruh pada proses pembelajaran di sekolah sehingga dibutuhkan suatu bahan ajar yang dapat meningkatkan keaktifan peserta didik. Penelitian ini bertujuan untuk mengembangkan e-modul sifat koligatif larutan berbasis Guided Discovery Learning untuk meningkatkan Higher Order Thinking Skills (HOTS), serta menentukan tingkat kevalidan, kepraktisan dan keefektifan e-modul yang dikembangkan. Penelitian dan pengembangan ini menggunakan model Plomp yang terdiri dari 3 tahap. Instrumen penilaian yang digunakan yaitu lembar observasi, angket, dan tes hasil belajar. e-Modul divalidasi oleh enam orang validator ahli dan diujicobakan kepada enam orang peserta didik serta 36 orang peserta didik di SMAN 14 Padang. Hasil validitas e-modul diperoleh nilai rata-rata Aiken’s V sebesar 0.84 dengan kategori sangat valid. Hasil Praktikalitas e-modul oleh guru dan peserta didik diperoleh nilai rata-rata sebesar 0.90 dan 0,88 dengan kategori sangat praktis. Hasil uji efektifitas hasil belajar e-modul diperoleh nilai rata-rata N-gain sebesar 0,691 dengan kategori sedang. Kata kunci: e-modul, guided discovery learning, higher order thinking skills, model pengembangan Plomp, sifat koligatif larutan.DOI: http://dx.doi.org/10.23960/jpmipa/v23i3.pp1038-1047

Pengembangan Multimedia Powerpint berbasis quided inquary learning pada materi reaksi reduksi oksidasi terhadap kemampuan berfikir tingkat tinggi siswa kelas X IPA SMA/MA Isramil Husna; Syamsi Aini; Hardeli Hardeli; Ananda Putra
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 5 (2022): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i5.1830

The purpose of this research is to develop a powerpoint media for oxidation and reduction reactions based on quided inquiry learning towards high-level thinking abilities of X-grade Senior High School students. The model used is the RND (Research and Development) development model with the 4D method, namely the stages of definition (Define), design (Design), development (Develop) and dissemination (Disseminate). The limitation of this research is only up to the development stage. This development assessment is valid and practical. There are two categories of validation, namely material validation with content, construct, linguistic and graphic validation elements, while media expert validation uses display and media elements. Elements of practice can be seen from the questionnaire conducted by 36 students and 2 teachers. The results of this study are powerpoint media that meet valid and practical criteria, so that they can be used for learning oxidation and reduction reactions to high-level thinking skills in senior high school

Pengaruh Penambahan Gum Arab Terhadap Pembuatan Plastik Biodegradable dari Air Kelapa Norma Wahyunita; Ananda Putra; Umar Kalmar Nizar; Fajriah Azra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.116214

Plastic is a polymer that we use a lot in everyday life, but it has a bad impact on the environment because it is difficult to degrade in nature. Therefore, a study was carried out to make plastic that is more environmentally friendly, namelyplastic Biodegradable that utilizes bacterial cellulose from Acetobacter xylinum with old coconut water as a medium with the addition of a plasticizer in the form of Polyethylene Glycol (PEG) and the addition of gum arabic additives with variations in the mass of gum arabic, namely 0g , 1g, 3g, 5g and 7g. The bacterial cellulose plastic PEG gum arabic produced was characterized includingwater content, degree ofswelling,testtensile strength, elongation, elasticity, ability biodegradation, functional group analysis (FTIR) and crystallinity test (XRD). The results of testing the water content and degree of swelling on PEG gum arabic bacterial cellulose plastic, obtained plastic with the more mass of gum arabic added, the greater the percentage of water content and degree of swelling. The results of mechanical testing showed an increase in the value of tensile strength and elasticity along with the amount of gum arabic added but the elongation value decreased. In the biodegradation test, it was found that the more gum arabic which was added, the biodegradation ability increased. The analysis of the plastic functional groups showed that there were no new groups formed. Crystallinity analysis showed that the addition of gum arabic can reduce the percentage of crystallinity.

Adsorpsi Anion Nitrat Menggunakan Silika Gel (SiO2) GPTMS Dimodifikasi dengan Dimetilamina Anisa Nahari; Budhi Oktavia; Miftahul Khair; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.115920

Silica or silicon dioxide is a chemical compound with the molecular formula SiO2 which can be obtained from the synthesis of crystals, silica minerals, and vegetables. Compounds resulting from the polymerization of silicic acid, which are composed of a tetrahedral SiO4 unit chain with the general formula SiO2. Each silica atom is surrounded by four oxygen atoms. Silica forms a polyhedral network, where the bonds between oxygen tetrahendral are one and the other. Silica will form a framework that has pores that are quite open and allow other molecules to enter and undergo adsorption on the surface of the silica. Modification of silica is done by adding heat at a certain temperature, adding reagents to the active site of silica will change the silica functional group. Silica with the addition of amine compounds reacted with GPTMS can be used as nitrate anion adsorption to see the absorption capacity of silica against nitrate anions using the batch method. The factors used to see this adsorption capacity include pH at pH 7 with an absorption of 1.931463 mg/g and the percentage of absorption is 79.5%. and contact time with a time of 90 minutes with an absorption of 0.32677 mg/g and the percentage of absorption is 67.28785%.

WATERMELON PEEL EXTRACT AS GREEN CORROSION INHIBITOR FOR ST-37 CARBON STEEL IN SEAWATER Sri Teguh Priharti; Umar Kalmar Nizar; Rita Sundari; Sri Benti Etika; Budhi Oktavia; Ananda Putra; Rini Anggraini
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 3, No 3 (2021)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Corrosion engineering has taken great interest in many industries that required high cost management to overcome the serious problems. This work has investigated the role of watermelon peel extract as green inhibitor to protect carbon steel in seawater. This investigation has studied the corrosion rate and inhibition efficiency applying weight loss method. The laboratory result shows the optimum inhibition efficiency found to be 71.64% at 5% inhibitor concentration in 100 ml seawater at room temperature. The effects of temperature and immersion time on inhibition efficiency have also been examined. This study has used Arrhenius equation based on activation energy to determine type of adsorption encountered with corrosion process. The result shows a chemical adsorption justified by its high adsorption heat and strengthened by FTIR and UV-Vis examinations. The phytochemical examination of watermelon peel extract gives positive response to flavonoid, alkaloid, and saponin. The finding is useful for many industries encountered with carbon steel corrosion in corrosive medium using green inhibitor.

Co-Authors Adhitya Suryadinata Anisa Nahari Annisa Salsabilla Aulia Rahmi Budhi Oktavia Desy Kurniawati Desy Kurniawati Edi Nasra Esti Ramadhani Fadhilatu Zikra Fajriah Azra Fiska Maya Wardhani Fitri Amelia Fitri Amelia Hairus Abdullah Hardeli Hardeli Hary Sanjaya Illa Ramadhani Indang Dewata Isramil Husna Juniyas Aditia Karina Ventika Sari Latisma Latisma Miftahul Khair Nanditho Azima Putra Nofrianto Nofrianto Norma Wahyunita Rahadian Zainul Refi Ikhtiari Ridho Hermawan Rini Anggraini Rita Sundari Sahna Ferdinand Ginting Sri Benti Etika Sri Teguh Priharti Syamsi Aini Syifa Rahma Ayunda Tri Lestari Simangunsong Umar Kalmar Nizar Vivi Chaniasi

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