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All Journal Jurnal Periodic Jurusan Kimia UNP Science and Technology Indonesia Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemical Science and Technology International Journal of Innovation in Mechanical Engineering and Advanced Materials
Ananda Putra
Universitas Negeri Padang
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics

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Pengujian Aproksimat Karbon Limbah Sabut Kelapa (Cocos nucifera) Nanditho Azima Putra; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 12, No 1 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v12i1.116901

Abstract

The carbon approximation test of coconut coir has been successfully carried out. Carbon made at a temperature of 350 oC with variations in the length of time of 30, 45, 60 and 75 minutes was found to meet the test levels of SNI No. 06-3720-1995 and the best carbonization time for 60 minutes. In coconuts, coconut fiber is the dominating part because almost 35% of the weight of coconuts is coconut husk. The existence of waste is supported by the average production of coconuts in Indonesia of 15.5 billion eggs/year, so that the available material is quite a lot. This is a support in producing carbon because 60% of lignin has a carbon content.
Pengaruh Penambahan Virgin Coconut Oil (VCO) Terhadap Sifat Mekanik Dan Biodegradasi Plastik Biodegradable Berbasis Selulosa Bakteri –Polietilen Glikol (PEG) Dari Air Kelapa (Cocos nucifera) Adhitya Suryadinata; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 12, No 1 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v12i1.116897

Abstract

Biodegradable plastics are plastics that are easily degraded by microorganisms. This study aims to determine the effect of adding virgin coconut oil additives to the mechanical properties and biodegradation of biodegradable plastic based on PEG bacterial cellulose from coconut water (Cocos nucifera). This study used 14% polyethene glycol 400 as a plasticizer with variations in the volume of virgin coconut oil, namely 2 mL, 4 mL, 6 mL, and 8 mL. The mechanical properties tested here are looking at the tensile strength, elongation, and elasticity values. The maximum result from testing the mechanical properties obtained is the addition of 6 mL of virgin coconut oil with a tensile strength value of 71,81 MPa which already meets the SNI standard for synthetic plastics, which is in the range of 24,7-302 MPa, the elasticity value obtained is 1819,275 MPa, and 3.9% elongation value. In the biodegradation test, it was found that the 15-day burial was degraded by more than 50%, where the more virgin coconut oil was added, the plastic's biodegradability decreased, but this is still much better than plastic made from synthetic materials, which can take decades. The functional group analysis using FTIR did not show any other functional groups formed, and the results of the analysis of the degree of crystallinity on biodegradable plastics obtained that the degree of crystallinity of pure SB plastic was 83.75%, SBPEG was 70.68%, and SBPEG-V 6 mL 81.31%.
Desorpsi Anion Klorida (Cl-) Dari Adsorben Silika Mesopori Template CTAB (Cetiltrimetilammoniumbromida) Termodifikasi Dimethylamine Fadhilatu Zikra; Budhi Oktavia; Ananda Putra; Desy Kurniawati
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

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

Abstract

Mesopore silica was prepared using sodium silica as a precursor and CTAB as a templating agent. However, silica has limitations in adsorption and desorption of chloride anions. Therefore, it is necessary to modify it to improve the action of mesopore silica. This study used DMA (dimethylamine) as a modifier with glycidoxypropyltrimethoxysilane (GPTMS) linking compound. Adsorption was carried out by injecting the adsorbate solution into the column containing the adsorbent at pH 7, and the optimum concentration was 20 mg/L. Furthermore, desorption was carried out by comparing the best desorption agents using acid desorption agents, namely nitric and sulfuric acids. The study showed that the percentage of nitrate desorption (95,29%)> sulfate (47,64%). After obtaining the best type of desorbing agent, desorption was carried out using nitrate with a concentration variation of (0,02; 0,04; 0,06; 0,08; 0,1) M. The optimum conditions for desorption of chloride anions on the modified mesoporous silica adsorbent were at 0,06 M.
Pemanfaatan Karbon Aktif Limbah Sabut Pinang (Areca catechu L) Sebagai Material Termoelektrik Sistem C/CuO Karina Ventika Sari; Ananda Putra
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118025

Abstract

Material termoelektrik merupakan suatu material yang dapat mengubah energi panas menjadi listrik. Pada penelitian ini dilakukan pemanfaatan karbon aktif limbah sabut pinang (Areca catechu L) sebagai material termoelektrik. Komposit karbon aktif – CuO dibuat dengan mecampurkan berbagai perbandingan massa (gram). Material komposit dilakukan pengujian tegangan listrik (efek seebeck), konduktivitas listrik dan daya hantar panas. Untuk melihat bentuk dan struktur kristal dilakukan karakterisasi X-Ray Diffraction (XRD) dan untuk mengetahui komposisi kimia digunakan karakterisasi X-Ray Fluorescence (XRF). Pengujian ini mendapati hasil bahwa material komposit perbandingan massa 0,5 gram karbon aktif dan 1 gram CuO merupakan material terbaik sebagai material termoelektrik karena mempunyai nilai konduktivitas listrik tinggi sebesar 0,0913 MΩ-.cm- dengan daya hantar panas yang rendah yaitu 4,96 J/s serta tegangan listrik (efek seebeck) sebesar 14,44 x 10-3 mV/K. Hasil karakterisasi XRD menunjukkan bahwa bentuk struktur dari komposit karbon aktif – CuO berbentuk amorf kristal yang tidak merubah bentuk kristal dari CuO dan karakterisasi XRF menunjukan tidak ada komposisi baru yang terbentuk pada material.
Pengaruh Penambahan Carboxymethyl Cellulose (CMC) Terhadap Sifat Mekanik Dan Biodegradasi Plastik Biodegradable Berbasis Selulosa Bakteri –Polietilen Glikol (PEG) Dari Air Kelapa (Cocos nucifera) Juniyas Aditia; Ananda Putra
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118009

Abstract

Biodegradable plastics are plastics that are easily degraded by microorganisms. This study aims to determine the effect of adding carboxymethyl cellulose additives to biodegradable plastics based on PEG bacterial cellulose from coconut water (cocos nucifera) and to determine physical, mechanical, and biodegradable properties. This study used 14% polyethylene glycol 400 as a plasticizer with variations in the mass of carboxymethyl cellulose, namely 2 gr, 4 gr, 6 gr, and 8 gr. The results of testing the physical properties obtained are the value of % water content and the degree of swelling increase with the addition of the mass of carboxymethyl cellulose. The maximum result from testing the mechanical properties obtained was in the addition of carboxymethyl cellulose 6 gr with a tensile strength value of 101.05 MPa, elasticity of 2544.83 MPa, and elongation of 13.78 %. In the biodegradation test carried out by burial for 15 days, the results obtained that more carboxymethyl cellulose added the ability of plastic biodegradation increased. The characteristics of the functional group using FTIR showed that there was no new functional group formed, and the results of the characteristics of the degree of crystallinity in biodegradable plastics obtained the degree of pure SB plastic kristanility was 83.75%, SBPEG was 70.68%, and SBPEG-C 6 gr was 74.20%.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v3i3.13759

Abstract

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