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All Journal EKSAKTA: Journal of Sciences and Data Analysis Jurnal Kimia Riset ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemical Analysis (IJCA)
Ganjar Fadillah
Analisis Kimia, FMIPA, Universitas Islam Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Energy Environmental Science Materials Science & Nanotechnology

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Preliminary Study of Photocatalytic Degradation of Methylene Blue Dye using Magnetic Alginate/Fe3O4 (Alg/Fe3O4) Nanocomposites Ganjar Fadillah; Muhamad Allan Serunting
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 19, ISSUE 1, February 2019
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol19.iss1.art3

Abstract

The Magnetic compound, Fe3O4, is one of the compounds that is easily hydrolyzed and oxidized. A coating method was presented in this study to prevent the process. The modifications of Fe3O4 were carried out by supporting alginate as natural polymers on the surface of Fe3O4. Preparation of magnetic alginate/Fe3O4 (Alg/Fe3O4) nanocomposite has been successfully synthesized. Alg/Fe3O4 material was synthesized using the coprecipitation method with Fe2+; Fe3+ (with molar ratio 1:2) and alginate 1% as precursors. Synthesized Alg/Fe3O4 nanoparticles were characterized by Fourier Transform Infrared Spectroscopy (FTIR), DelsaTM Nano C Particle Analyzer, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), and Energy Dispersive Spectroscopy (EDS). The Alg/Fe3O4 has an average diameter of 13.70 nm. Photodegradation test of synthetic methylene blue (MB) dye was found at pH 5.0 and irradiation time under UV245 for 60 minutes. The degradation results showed that the percentage of MB dye removal reached more than 90%.
MODIFIKASI ELEKTRODA PASTA KARBON (EPK) MENGGUNAKAN GRAFENA OKSIDA (GO) UNTUK PENENTUAN BUTIL HIDROKSI ANISOL SECARA VOLTAMMETRI Ganjar Fadillah; Elsa Ninda Karlinda Putri; Syahna Febrianastutib
Jurnal Kimia Riset Vol. 3 No. 2 (2018): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (779.563 KB) | DOI: 10.20473/jkr.v3i2.10010

Abstract

Butil hidroksi anisol (BHA) merupakan senyawa aditif yang banyak ditemukan dalam sediaan bahan pangan dan memberikan efek karsinogenik pada jumlah yang besar. Mengingat pentingnya analisis senyawa tersebut dan regulasi yang cukup ketat maka pada penelitian ini telah dikembangkan metode analisis berbasis elektrometri yaitu modifikasi elektroda pasta karbon (EPK) dengan grafena oksida (GO) untuk meningkatkan sensitivitas pengukuran. GO dipreparasi menggunakan metode Hammer yang dimodifikasi dan dikarakterisasi menggunakan x-ray diffraction (XRD) dan fourier transform infra red (FTIR). Hasil pengukuran analit menggunakan differential pulse voltammetry (DPV) menunjukan bahwa adanya modifikasi tersebut dapat meningkatkan respon arus pengukuran yang dihasilkan dari 11,70 μA menjadi 31,21 μA dalam larutan BHA 0,5 mM dengan elektrolit pendukung PBS 0,1 M pH 7. Hasil uji hipotesis  menunjukkan bahwa adanya nilai beda yang signifikan antara EPK/GO dengan EPK tanpa modifikasi terhadap respon arus pengukuran analit BHA.
Efek Komposisi Bioadsorben α-Keratin/Alginat Terhadap Kapasitas Adsorpsi Logam Berat Besi (Fe) Elsa Ninda Karlinda Putri; Syahna Febrianastuti; Easy Vicky Maylinda; Ganjar Fadillah; Candra Purnawan
ALCHEMY Jurnal Penelitian Kimia Vol 14, No 2 (2018): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.14.2.11410.323-333

Abstract

Penelitian terkait pengaruh komposisi α-keratin/alginat terhadap kapasitas adsorpsi logam berat besi (Fe) telah dilakukan. Penelitian ini bertujuan untuk mengetahui karakter dan optimasi adsorpsi dari bioadsroben komposit α-keratin/alginat terhadap daya serap logam berat Fe dalam larutan air. Proses preparasi bioadsorben α-keratin/alginat dilakukan dengan metode enkapsulasi pada larutan CaCl2 2% (b/v). Karakterisasi bioadsorben dilakukan menggunakan Fourier Transform Infra-Red (FTIR), Scanning Electron Microscopy (SEM) dan proses adsorbsi dilakukan dengan metode batch. Hasil karakterisasi IR pada komposit α-keratin/alginat menunjukkan terdapatnya serapan pada bilangan gelombang 1140-820,75 cm-1 yang merupakan reduksi gugus mannuronate dari alginat. Hal ini menunjukan bahwa alginat telah terikat secara kimia dengan α-keratin. Adsorpsi logam Fe (3 ppm) dalam larutan dilakukan dengan variasi komposisi α-keratin:alginat secara berturut-turut sebagai berikut 1:1; 1:2; 1:3; 2:1 dan 3:1 (b/b). Hasil pengukuran menggunakan Atomic Absorption Spectroscopy (AAS) dengan metode kurva kalibrasi standar menunjukkan komposisi optimum penyerapan logam Fe (3 ppm) adalah 1:2 dengan kapasitas adsorpsi sebesar 205,64 mg/g. Hasil karakterisasi SEM pada komposit α-keratin:alginat komposisi 1:2 (b/b) yang memberikan kemampuan adsorpsi yang terbesar menunjukkan bahwa permukaan rambut manusia tidak tertutup secara menyeluruh sehingga gugus aktif dan celah-celah kecil pada komposit dapat berperan dalam proses adsorpsi logam berat besi (Fe).The Effect of α-Keratin/Alginate Bioadsorbent Composition on the Adsorption Capacity of Heavy Metal of Iron (Fe). A study of the influence of α-keratin-alginate composition on the heavy metal adsorption of Fe has been performed. The research aims to determinate the character and adsorption optimation of α-keratin/alginate composite for Fe adsorption in aqueous solution. The preparation α-keratin/alginate composite was conducted by encapsulation method in CaCl2 2% solution. The characterization of bioadsorbent was performed by Fourier Transform Infra-Red (FTIR), Scanning Electron Microscopy (SEM) and adsorption process was conducted by batch method. The FTIR result on α-keratin/alginate shows that adsorption at wavenumber of 1140-820.75 cm-1 which indicates the reduction of mannuronate group from alginate. This suggests that alginate was chemically bound with α-keratin. The adsorption of Fe (3 ppm) in the solution was carried out with variation of composition α-keratin:alginate of 1:1; 1:2; 1:3; 2:1; and 3:1 (w/w). The measurement using AAS (atomic absorption spectroscopy) with standar calibration curve method showed that optimum composition of Fe (3 ppm) adsorption was 1:2 (w/w) with adsorption capacity of 205.64 mg/g.  The SEM result on α-keratin/alginate 1:2 (w/w) which had the greatest adsorption capability shows that the surface of human hair was not completely closed thus the active groups and pores can play a role in the process of adsorption of heavy metal iron (Fe).
Effect of Garlic Powder Addition to Gelatin Biocomposite on Its Antibacterial Activity Pramudita Putri Kusuma; Ganjar Fadillah; Husna Syaima; Teguh Endah Saraswati
ALCHEMY Jurnal Penelitian Kimia Vol 12, No 1 (2016): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.12.1.930.1-13

Abstract

The addition of garlic powder to gelatin from chicken claw waste was potentially developed as a natural preservative in food, especially for meat. Preparation of gelatin/garlic biocomposite was performed in three stages: synthesis of gelatin from chicken claw, garlic powder preparation as allicin source and preparation of biocomposite gelatin/garlic. The preparation of dry biocomposites was done by weighing the gelatin and garlic powder in weight ratio of 1 : 1 and 1 : 2 (w/w) in the total mass of 0.75 grams. For wet biocomposite preparation, the mixture of the powder was solved in 5 mL of lactic acid 2 %. Functional groups of gelatin, garlic and biocomposite were analyzed by fourier transform infrared spectroscopy (FTIR). The antibacterial activity of biocomposite against Staphylococcus aureus were tested using disc diffusion method. This test was performed on garlic powder, solvent and gelatin/garlic biocomposites powder in the ratio of 1 : 1 and 1 : 2 in 2 % lactic acid solvent. The biocomposite with a weight ratio of gelatin : garlic of  1 : 1 had the optimum diameter of inhibition zone. The effectiveness of biocomposite gelatin/garlic as natural preservative applied in meat was also physically studied by organoleptic analysis. Organoleptic analysis through the hedonic test was conducted on the parameters of color, smell, and texture of gelatin/garlic biocomposites-coated meat. The results showed that the addition of garlic can increase the effectiveness of gelatin as a natural preservative of meat for four days stored in closed packaging at room temperature.
Pengujian Kualitas Tanah sebagai Indikator Cemaran Lingkungan di Sekitar Pantai Tanjung Lesung, Banten Nur Ayu Fitriani; Ganjar Fadillah; Riri Enriyani
Indonesian Journal of Chemical Analysis (IJCA) Vol. 1 No. 01 (2018): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol1.iss1.art4

Abstract

Telah dilakukan penelitian tentang analisis kualitas tanah Tanjung Lesung, Pandeglang, Banten. Penelitian ini dilakukan secara in situ dan pengujian lanjut di laboratorium. Berdasarkan hasil penelitian dan analisis baik secara in situ maupun laboratorium yang telah dilakukan pada sampel kebun tanah 1 dan 2 di daerah pantai Tanjung Lesung, Kabupaten Pandeglang, diperoleh bahwa nilai keasaman tanah (pH) berkisar antara 6-7, Kapasitas Tukar Kation (KTK) diperoleh sebesar 0,0804 dan 0,0809 meq/g secara berturut-turut untuk tanah kebun 1 dan 2 serta kandungan logam berat Pb, Cu, Cd dan Cr masih memenuhi ambang batas cemaran lingkungan tanah. Secara keseluruhan kondisi tanah di sekitar sampling masih memiliki kondisi yang baik dan belum tercemar.
Glass tube-coated TiO2 nanostructure for degradation of methylene blue: an experimental and design of column photocatalytic reactor Rahmat Hidayat; Ganjar Fadillah; Shin-Ichi Ohira
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art6

Abstract

This work presents the successfully of TiO2 nanostructure synthesis using manual grinding combined hydrothermal method for photocatalyst. XRD confirmed that TiO2 was arranged by anatase and rutile phase with crystal size of 18.54 nm. Characterization of digital microscope shows the spread of catalyst on the glass tube surface, which can be observed furthermore using interactive 3D surface plot. Band gap energy determination from UV-Vis spectroscopy scanning shows the minimum energy that is required to facilitate electron-hole generated. In 20 min of irradiation, TiO2 existence can completely decompose MB (100%) that can be presented by TiO2 absence. Degradation of MB is higher effective in acidic condition which optimum pH of 5. Using first order reaction, glass tube-coated TiO2 has rate constant of 0.2102 min-1, 1.5 times faster than bare glass tube. This enhancement proves that the designed reactor has good prospect for organic pollutant treatment. Moreover, compared with other reported study, this system provides relatively more effective of MB photodegradation.
Co-Authors Candra Purnawan Easy Vicky Maylinda Elsa Ninda Karlinda Putri Elsa Ninda Karlinda Putri Husna Syaima Muhamad Allan Serunting Nur Ayu Fitriani Pramudita Putri Kusuma Rahmat Hidayat Riri Enriyani Shin-Ichi Ohira Syahna Febrianastuti Syahna Febrianastutib Teguh Endah Saraswati