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All Journal VALENSI Jurnal Natur Indonesia Jurnal Matematika & Sains Jurnal Fisika Unand Jurnal Riset Kimia Majalah Kulit, Karet, dan Plastik Journal of Aceh Physics Society ODONTO Dental Journal Jurnal Litbang Industri CHEMPUBLISH JOURNAL ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Indonesian Journal of Pure and Applied Chemistry Jurnal Ilmu Fisika Jurnal Riset Teknologi Pencegahan Pencemaran Industri Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Hydrogen: Jurnal Kependidikan Kimia REACTOR : Journal of Research On Chemistry And Engineering Jurnal Litbang Industri Andalas Dental Journal SAINTI: Majalah Ilmiah Teknologi Industri Aceh International Journal of Science and Technology Jurnal Katalisator Odonto dental journal Jurnal Penelitian Kehutanan Wallacea Journal of The Indonesian Society of Integrated Chemistry Jurnal Kimia Unand
Emriadi -
Chemistry Department Faculty Of Mathematics And Natural Sciences Universitas Andalas
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

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The Influence of Solution Concentration and pH for Removal Indigo Carmine using Banana Stem as a Biosorbent Rahmiana Zein; Yuliana Arianti; Emriadi Emriadi; Putri Ramadhani; Syiffa Fauzia
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 6 (2023): December 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i6.9844

Abstract

The textile industry is one sector that generates effluent containing a significant quantity of pollutants, including dyes, and thus has an effect on the environment. Synthetic dyes, which are toxic and difficult to degrade, are utilized extensively in the textile industry. Therefore, a new study utilizes banana stems as a cost-effective biosorbent to remove indigo carmine dye. This research aims to investigate the use of banana stem waste as a bisorobent in batch method to adsorption indigo carmine dye. The optimal concentration and pH values are 2 and 900 mg/L, respectively. The interaction between the indigo carmine dye and the banana stems is suggested by the FTIR analysis.  The solution's indigo carmine dye may be adsorbed by banana stem.
Pemanfaatan Ekstrak Lignin Dari Kulit Jengkol (Pithecellobium jiringa) Sebagai Inhibitor Korosi Baja Lunak Dalam Medium HCl Emriadi Emriadi; Savira Nurul Hayuni; Yeni Stiadi
Jurnal Kimia Unand Vol. 11 No. 2 (2022): November 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.2.14-21.2022

Abstract

Lignin extract from jengkol peel (Pithecellobium jiringa) as a mild steel corrosion inhibitor in 1 M HCl solution was studied using weight loss method, characterization Fourier Transform Infra Red (FTIR), Ultraviolet-Visible (UV-Vis) spectroscopy, and optical microscopy. The inhibition efficiency increased with increasing temperature and the concentration of lignin extract in 1 M HCl solution. The highest efficiency value was 90,1% with the addition of 10 g/L extracts at 60°C. The adsorption of lignin extract from jengkol peel followed the Langmuir adsorption isotherm. Thermodynamic parameters such as Gibbs energy (ΔG), enthalpy (ΔH), entropy (ΔS), and activation energy were calculated to determine the mechanism of corrosion inhibition. FTIR analysis and UV-Vis spectroscopy showed an interaction between lignin extract from jengkol peel and mild steel surface. Optical microscopy analysis showed that lignin extract from jengkol peel could reduce the formation of rust on the steel surface.
Potensi Biosorben Kulit Batang Sagu (Metroxylon sago) untuk Penyerapan Zat Warna Crystal Violet: Studi Isoterm, Kinetika, Termodinamika, dan Aplikasi Zein, Rahmiana; Marliani, Indah Tika; Emriadi, Emriadi; Ramadhani, Putri; Fauzia, Syiffa
Journal of The Indonesian Society of Integrated Chemistry Vol. 15 No. 2 (2023): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v15i2.29245

Abstract

[The Potential of Sago Bark (Metroxylon sago) as Biosorbent for Adsorption of Crystal Violet Dye: Isotherm, Kinetic, Thermodynamic Studies and Its Application] Penelitian bertujuan untuk memanfaatkan limbah kulit batang sagu (Metroxylon sago) sebagai biosorben yang berbiaya rendah untuk penyerapan zat warna crystal violet. Metoda adsorpsi dengan sistem batch digunakan dalam proses optimasi dengan parameter yaitu pengaruh pH, kosentrasi awal, waktu kontak dan suhu pemanasan biosorben. Kondisi optimum diperoleh pada pH 7, konsentrasi awal 900 mg/L, waktu kontak 45 menit, dan suhu pemanasan biosorben 25°C dengan kapasitas adsorpsi sebesar 72,57 mg/g. Proses adsorpsi mengikuti model isoterm Langmuir (R2 = 0,9985) dan model kinetika orde dua semu dengan R2 = 0,9890. Studi termodinamika menunjukkan bahwa proses adsorpsiberlangsung secara spontan dan eksotermik. Siklus adsorpsi-desorpsi menggunakan asam asetat 30% didapatkan sebanyak 5 siklus. Hasil penelitian menunjukkan bahwa limbah kulit batang sagu memiliki potensi sebagai adsorben berbiaya murah, ramah lingkungan dan efisiensi yang tinggi. Kata kunci/keyword: Adsorpsi, biosorben, crystal violet, adsorption, biosorbent, crystal violet.
Inhibisi Korosi Baja Lunak dengan Ekstrak Daun Miana (Coleus scutellaroides (L.) Benth.) dalam Medium HCl Putri, Sanaq Elfira; Gusniardi, Vira Anggita; Suryati, Suryati; Emriadi, Emriadi
Journal of The Indonesian Society of Integrated Chemistry Vol. 15 No. 2 (2023): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v15i2.29253

Abstract

[Corrosion Inhibition of Mild Steel with Miana (Coleus scutellaroides (L.) Benth.) Leaves Extract in HCl Medium] Penelitian ini bertujuan untuk mengetahui pengaruh penambahan ekstrak daun miana (Coleus scutellaroides (L.) Benth.) (EDM) terhadap laju korosi baja lunak, mengidentifikasi jenis adsorpsi, dan mengkarakterisasi permukaan baja lunak baik sebelum maupun setelah penambahan EDM. Metode kehilangan berat (weight loss) digunakan untuk menguji laju korosi, jenis adsorpsi diidentifikasi melalui perhitungan termodinamika, dan karakterisasi permukaan dievaluasi dengan menggunakan fourier transform infrared (FTIR), X-Ray Diffraction (XRD), dan Scanning Electron Microscopy (SEM). Hasil penelitian menunjukkan bahwa laju korosi terendah didapatkan pada suhu 30℃ dengan konsentrasi EDM sebesar 6 g/L sebesar 0,153 mg/cm²jam dengan efisiensi inhibisi 88,288%. Analisis karakterisasi menunjukkan adanya interaksi antara EDM dengan permukaan baja lunak. Penelitian ini diharapkan dapat memberikan informasi terhadap penggunaan EDM sebagai inhibitor korosi yang ramah lingkungan. Kata kunci/keyword: Adsorpsi, daun miana, inhibisi korosi, adsorption, miana leaves, corrosion inhibitor
The Presence of Microplastics in Shellfish: A Review Aura, Selfi Monica; Deswati, Deswati; Emriadi, Emriadi
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i1.10820

Abstract

This study aims to find the presence of microplastics in Shellfish through the literature review method of several studies conducted. The increase in plastic pollution in water systems since the 1950s has become a significant problem worldwide due to the slow decomposition rate. Microplastics, mainly primary and secondary, can accumulate in marine organisms such as Shellfish and enter the food chain, which is a concern for humans. Shellfish, especially M. galloprovincialis, can be used as bioindicators and bioremediation tools to tackle microplastic pollution. Microplastics are a severe problem in the world's oceans, especially in marginal and densely populated coastal areas. Marine organisms like Shellfish contain microplastics, which can cause physical damage and disrupt the immune system. Mytilus edulis clams and Crassostrea gigas oysters are the most consumed species with significant microplastic content. Research has also shown the presence of microplastics in Mytilus chilensis in the Gulf of Ushuaia, South America, with fibers and fragments being the most common types. Microplastics are also found in wild mussels in Tunisia, with the estimated annual dietary intake of microplastics by Tunisians through wild mussel consumption amounting to 4.2 particles per capita per year. Mussels of the genus Mytilus were proposed as guardian organisms to monitor microplastic pollution.
Sifat Adsorptif dan Termodinamika Ekstrak Lignin dari Pelepah Nipah (Nypa fruticans Wurmb) untuk Korosi Baja Lunak dalam Medium HCl Hilda Sartika; Emriadi; Yeni Stiadi; Suryati Suryati
Jurnal Fisika Unand Vol 13 No 6 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.6.784-791.2024

Abstract

Research on the adsorptive and thermodynamic properties of lignin extract from Nipah fronds (Nypa fruticans Wurmb) for mild steel corrosion in hydrochloric acid medium has been conducted. The inhibititon effect of lignin extract from Nipah (Nypa fruticans Wurmb) fronds (LENF) on the corrosion of mild steel in HCl solution was studied by weight loss and optical microscopy methods. The results show that LENF was a good inhibitor in 1.0 M HCl, and the inhibition efficiency increases with increasing concentration of the extract and temperature. Inhibitive effect was afforded by the adsorption of the extract on the steel surface, which was found to accord with Langmuir adsorption isotherm. Adsorption and activation parameters such as activation energy (Ea), enthalpy (∆Η), free Gibbs energy (∆G), and entropy (∆S) were evaluated on the corrosion and inhibition process.
Sintesis Karbon Aktif Dari Batang Jagung(Zea mays L.) dengan Metoda Dehidrasi Asam Untuk Aplikasi Elektroda Superkapasitor Olly Norita Tetra; Syukri Syukri; Adlis Santoni; Deswati Deswati; Nabiel Fajarandi; Emriadi Emriadi
Jurnal Fisika Unand Vol 13 No 6 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.6.834-842.2024

Abstract

Activated carbon from corn stalks (Zea mays L.) has been successfully synthesized by the dehydration method and used as a supercapacitor electrode. Corn stalk powder was dehydrated with 1 MH2SO4 and activated with 5 M NaOH at a carbon and activator mass ratio of 1:4 with a heating temperature of 800°C and an N2 gas heating rate of 10°C/minute for 1 hour. SEM characterization results show that heterogeneous pores have formed on the surface of corn stalk-activated carbon. EDX results showed a carbon percentage of 54.82%; this data is supported by FTIR results, which show several functional groups containing C and O atoms on the surface of activated carbon. Based on desorption adsorption isotherm analysis, the activated carbon shows H4 type with a specific surface area of 117.973m2/g, average pore diameter of 1.730 nm and total pore volume of 0.1021 cm3/g. Measurement of the electrochemical properties of corn stalk activated carbon with a three-electrode system and 3 M KOH electrolyte showed a specific capacitance value of 133.9 F/g, power density 225.2 W/kg and energy density 0.863 Wh/kg. The synthesis of activated carbon through the dehydration method offers advantages in terms of simplicity in preparation, low cost, shorter synthesis time and being environmentally friendly.
Sintesis Senyawa Aurivillius Ca1-xBi3,5+xLa0,5Ti4-xMnxO15: Struktur dan Sifat Dielektrik Zulhadjri Zulhadjri; Rini Ramadhani; Aulia Arivin Billah; Syukri Arief; Emriadi Emriadi
ALCHEMY Jurnal Penelitian Kimia Vol 14, No 1 (2018): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.14.1.14476.143-151

Abstract

Sintesis senyawa feroelektrik yang berbasis fasa Aurivillius berlapis empat (n = 4) yang didadah kation La3+ dan Mn3+, Ca1-xBi3,5+xLa0,5Ti4-xMnxO15 dengan x = 0, 0,2, 0,4, 0,6, 0,8, dan1 telah dilakukan dengan teknik lelehan garam. Karakterisasi produk dengan difraksi sinar-X (XRD) menunjukkan bahwa fasa tunggal Aurivillius ditunjukkan oleh sampel dengan x = 0, 0,2, 0,4, dan 0,6. Refinement struktur dengan teknik Le Bail diketahui bahwa senyawa Aurivillius yang terbentuk sesuai dengan simetri ortorombik dan grup ruang A21am. Analisis dengan Scanning Electron Microscopy (SEM) untuk semua sampel memperlihatkan morfologi sampel berupa lempengan yang merupakan ciri khas senyawa Aurivillius. Nilai konstanta dielektrik sampel dan konduktivitasnya mengalami kenaikan dengan meningkatnya x. Konduktivitas paling tinggi dimiliki oleh sampel x = 0,2 yang diperkirakan akibat adanya interaksi pertukaran ganda (double exchange) antara Mn3+ dan Mn4+.Synthesis of Aurivillius Compounds Ca1-xBi3,5 + xLa0,5Ti4-xMnxO15: Structure and Dielectric Properties. Synthesis of ferroelectric compounds based on a four-phase Aurivillius phase (n = 4) which is doped with La3+ and Mn3+ cations, Ca1-xBi3,5+xLa0,5Ti4-xMnxO15 with x = 0, 0.2, 0.4, 0.6, 0 , 8, and 1 were carried out by molten salts technique. Characterization of products using X-ray diffraction (XRD) revealed that the single phase Aurivillius was shown by the samples with x = 0, 0,2, 0,4, and 0,6. The results of refinement show that the Aurivillius phase formed has orthorhombic symmetry with A21am space group. Morphology analysis by scanning electron microscopy (SEM) for all samples shows the plate-like as the characteristic of Aurivillius compounds. The value of dielectric constant and conductivity of the samples increases as increase of x. The conductivity of x = 0.2 is the highest predicted due to the interaction of double exchange between Mn3+ and Mn4+.
Inhibitorty Activity of Lemongrass (Cymbopogon Nardus, (L.) Rendle) Essential Oils on The Growth of Bacterial Phorpyromonas Gingivalis and Aggregatibacter Actinomycetemcomitans In Vitro Suprianto, Kosno; Emriadi, Emriadi; Kodir, Ade Ismail Abdul; Lestari, Dian
Odonto : Dental Journal Vol 11, No 2 (2024): December 2024
Publisher : Faculty of Dentistry, Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/odj.11.2.359-365

Abstract

Background: Periodontal disease is one of oral and dental health problems that suffered by many people in the world and occurs in 50% of adult population. Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans are the main bacteria that cause periodontitis. One of the plants that is often used as an alternative antimicrobial agent is citronella (Cymbopogon nardus L.) which contains citronellal and geraniol compounds. This study aims to determine whether the essential oils of lemongrass leaves have inhibitory effect on the growth of Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans in vitro. Method: The production of lemongrass essential oils is carried out by the distillation method and 25%, 50%, and 75% concentration of essential oils are diluted using Tween 20 and distilled water. The inhibition test was carried out by the Kirby-Bauer disk diffusion method on Mueller Hinton Agar media. Result: The analysis showed that there was a significant difference between the inhibitory power produced by each concentration of essential oil of citronella leaf on the growth of Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans. Conclusion: The conclusion of this study is the essential oils of lemon grass with concentrations of 25%, 50%, 75%, and 100% have different inhibitory properties in inhibiting the growth of Porphyromonas gingivalis bacteria and Aggregatibacter actinomycetemcomitans.
Diazo Red B Dye Removal by Electrocoagulation Method using Aluminum Electrode Emriadi, Emriadi; Refinel, Refinel; Khalishah, Salwa
Aceh International Journal of Science and Technology Vol 13, No 2 (2024): August 2024
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.13.2.41243

Abstract

The removal of diazo red B dye was studied in water using the electrocoagulation method with an aluminum electrode. The study aimed to reduce the presence of harmful diazo red B dyes in the environment and their impact on living organisms. This study was conducted by testing various parameters with specified values. The initial dye concentrations were set at 10, 20, 30, 40, and 50 mg/L, while the electrocoagulation times were varied at 30, 60, 90, 120, 150, and 180 minutes. The initial pH levels were adjusted to 5, 6, 7, and 8. The applied voltages were 2.5, 5, 7.5, 12.5 V, and the distances between electrodes varied at 1, 1.25, 1.5, 1.75, and 2 cm. The study also examined the effects of initial dye concentration on electrocoagulation time, its interaction with pH, and the influence of pH on electrocoagulation time. These parameters aim to determine the optimum conditions for diazo red B removal, as measured by a UV-Vis spectrophotometer at a wavelength of 420 nm. The optimum removal efficiency of diazo red B was achieved with 94.32% for an initial dye concentration of 30 mg/L, 94.13% for an electrocoagulation time of 180 minutes, 96.00% at a pH of 6, 95.32% for a voltage of 7.5 V, and 95,75% for an electrode distance of 1.5 cm. Additionally, the efficiencies were 99.5% for concentration relative to time was 99.5%, for concentration relative to pH was 97.85%, and for pH relative to time was 96.00%. Additionally, the coagulant analysis of the electrocoagulation results was carried out using FTIR and morphological analysis of the surface of the damaged aluminum anode using an optical microscope.
Co-Authors A, Hermansyah AA Sudharmawan, AA Ade Saputra Ade saputra Adlis Santoni Admin Alif Admin Alif Admin Alif Admin Alif Afdhal Muttaqin Afrizal Afrizal Ahmad Darmawi Alfi Asben Alif, Admin Amelia Amir Annisa Wulandari Anwar Kasim Arianti, Yuliana Athiyya Husna Aulia Arivin Billah Aura, Selfi Monica Azimatur Rahmi Bambang Ristiono Bustanul Arifin BUSTANUL ARIFIN Delfi Silvia Della Rosalynna S. Deswati Deswati DIAN LESTARI Eli Susanti Eni Rahmi Fajarandi, Nabiel Fauzia, Syiffa Fitria Ramadhani G Gunawarman, G Gita Rachmad Wibowo Gusniardi, Vira Anggita Hemansyah Aziz Hermansyah A Hermansyah Aziz Hilda Sartika I Imelda Ibnu Irawan Ida Ayu Putu Sri Widnyani Imelda Imelda Indah Wulandari Islami, Dini Muthi'ah Kazuhiro Manseki Khalishah, Salwa Kodir, Ade Ismail Abdul Kosno Supriyanto Lidia Gusfi Marni Mai Efdi Mai Efdi Maria Erna Maria Erna Maria Erna Kustyawati Marliani, Indah Tika Marniati Salim Maryam, Maryam Matlal Fajri Alif Mohd Jain Noordin Murdiman, Imelda Murniwati Murniwati Nabiel Fajarandi Netri Elisma Novelina Novesar Jamarun Novesar Jamarun Novesar Jamarun Nurul Trinanda Rizal Olly Norita Tetra Pradiwi, Nailatul Zahrah Putri Arwanda Putri Ramadhani Putri Ramadhani, Putri Putri Yolanda Putri, Sanaq Elfira Rahma Joni Rahmayeni Rahmiana Zein Redha Fauzana Refinel - Rini Ramadhani S Syukri Safni Safni Sanaq Elfira Putri Sari Wahyuni Sartika, Hilda Savira Nurul Hayuni Silvia, Delfi Solly Aryza Sri Handani Sri Mutiar Sri Mutiar Sri Wildani Suryati Suryati Suryati Suryati Suryati Susanti, Eli Syiffa Fauzia Syukri Arief Syukri Arief Syukri Syukri Syukri Syukri Takashi Sugiura Vira Anggita Gusniardi Wellia, Diana Vanda Wibowo, Gita Rachmad Wildani, Sri Wulandari Wulandari Yeni Stiadi Yetria Rilda Yola Azli Perdana Yuli Yetri Yuli Yetri Yuliana Arianti Yulizar Yusuf Yulizar Yusuf Zilfa Zilfa Zulhadjri Zulhadjri