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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Matematika & Sains The Journal of Pure and Applied Chemistry Research Jurnal Ilmiah Arena Tekstil JKPK (Jurnal Kimia dan Pendidikan Kimia) Fullerene Journal of Chemistry Amina Warta AKAB Proceeding ISETH (International Summit on Science, Technology, and Humanity)

Muhammad Ali Zulfikar

Institut Teknologi Bandung

Author-ID : 5491291

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Social Sciences Other

Published : 12 Documents Claim Missing Document

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Synthesis and Characterization of Poly(methyl methacrylate)/SiO2 Hybrid Membranes: Effect of Silica Contents on Membrane Structure Muhammad Ali Zulfikar; Abdul Wahab Mohammad
Jurnal Matematika & Sains Vol 11, No 4 (2006)
Publisher : Institut Teknologi Bandung

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

Hybrid organic-inorganic based on poly(methyl methacrylate)/SiO2 (PMMA/silica) membranes were prepared using sol-gel technique under acidic conditions with different tetraethoxy orthosilane (TEOS) concentration. The thin membrane films were characterized using water permeability, water uptake, size porosity, Fourier Transform Infra Red (FTIR) and SEM analysis. Dispersion of particles in the nano scale was only possible with addition of TEOS above 10%. Organic-inorganic solutions with compositions varying from 100 PMMA/ TEOS 0 to 75 PMMA/25 TEOS were used to cast the asymmetric membranes. Water permeability, water up take and porosity size increase as TEOS content increases. SEM analysis showed that the membrane morphology changed from co-continuous phase to nodule structure if 10% TEOS was added, then return to co-continuous phase again when above 15% of TEOS was added.

SIMULASI DINAMIKA MOLEKUL FENOMENA ADSORPSI DI-(2-ETILHEKSIL)FTALAT (DEHP) PADA MINERAL MONTMORILONIT Umma, Reza Roisatul; Zulfikar, Muhammad Ali; Ledyastuti, Mia
AMINA Vol 2 No 3 (2020): December 2020
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/amina.v2i3.1424

Senyawa di(2-etilheksil) ftalat (DEHP) merupakan salah satu polutan yang ditetapkan oleh European Union (EU) dan World Health Organization (WHO) ke dalam daftar polutan utama dan dianggap paling bermasalah bagi kesehatan manusia yaitu dapat menimbulkan gangguan sistem endokrin, sistem saraf, dan hepatotoksik. DEHP digunakan sebagai plasticizer terutama pada polivinil klorida (PVC) yang hampir 50% mengandung DEHP. Senyawa DEHP tidak terikat secara kovalen dengan produknya sehingga mudah terlepas dari produk dan dapat memasuki lingkungan bebas. Jumlah DEHP di lingkungan bebas perlu dikendalikan dan salah satu metode yang sederhana dan efektif adalah adsorpsi. Pada penelitian ini dilakukan adsorpsi dengan pendekatan molekuler, yaitu simulasi dinamika molekul menggunakan perangkat lunak GROMACS. Penelitian ini bertujuan untuk membandingkan adsorpsi DEHP pada montmorilonit dan montmorilonit termodifikasi BDED atau CTMA yang kemudian disebut sebagai organo-montmorilonit, serta menentukan kondisi optimum sistem adsorpsi DEHP. Berdasarkan hasil simulasi, konsentrasi awal (C0) DEHP 0,044 mol/L menghasilkan adsorpsi maksimum yaitu sebanyak 3 molekul DEHP teradsorpsi (77,5%). Saat C0 DEHP dinaikkan menjadi 0,088 mol/L, tidak ada molekul DEHP yang teradsorpsi pada permukaan MMT. Sementara itu, pada MMT (1 lapis) termodifikasi BDED dengan jumlah molekul BDED 0,24 KTK, persentase adsorpsi mengalami peningkatan menjadi 44%. Hal ini menunjukkan bahwa penambahan surfaktan kationik berhasil meningkatkan persentase adsorpsi DEHP.

An Optimization of Functional Monomer, A Preliminary Study of Meropenem Imprinted Polymer as Selective Sorbent Lasmaryna Sirumapea; Muhammad Ali Zulfikar; M. Bachri Amran; Anita Alni
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 3, No 2 (2018): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Molecularly imprinted polymer is a polymer that synthesized together with targeted molecule (analyte) through polymerization process. When the polymerization has completed, extraction is taken to pull the analyte out of the polymer, and it will give a specific “frame” of targeted molecule which leave cavities and further is used to give specific recognition of the analyte. Functional monomer, template molecule, crosslinker agent, porogenic solvent and initiator are the main components involved in the synthesis of this kind of polymer. The right functional monomer is needed to make polymer building block with high selectivity when used as sorbent. The selection of suitable and precise functional monomer has been elaborated in this study. methacrylate acid, itaconic acid and acrylamide is then studies as functional monomer that will be chosen to give the best polymer performance as sorbent. From IR spectrum results, it can be concluded that polymer has been synthesized successfully. Peak at 1157 cm-1 which is a peak of C-N bond from β-lactam ring support this statement. Finally, it can be concluded that methacrylate acid is the best functional monomer for making polymer as sorbent for meropenem

Study of Humic Acid Adsorption Equilibrium on Dual Nanofiber PMMA/PVDF Muhammad Ali Zulfikar; Afdal Bahri; Muhamad Nasir
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 3, No 1 (2018): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

The main objective of this study is to investigate the isotherm sorption of humic acid (HA) from aqueous solution onto dual nanofiber PMMA/PVDF. Batch adsorption experiments were carried out using HA solution as an adsorbate under variety of concentration in the range of 50-200 mg/L. The experimental data were analyzed by the Langmuir, Freundlich and Sips models of adsorption. The experimental results indicate that, the adsorption capacity of HA adsorption increases with an increase in the HA concentrations. The adsorption of HA onto dual nanofiber PMMA/PVDF agrees well with the Langmuir isotherm models with the maximum adsorption capacity was found to be 137.40 mg g-1 at concentration of 100 mg L-1.

Cyclic Voltammetry Study of Mediated Electrochemical Oxidation Using Platinum Wire, Pt/Co(OH)2 and Pt/Co Electrodes In Various Supporting Electrolytes Herlina Herlina; Muhammad Ali Zulfikar; Buchari Buchari
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 3, No 2 (2018): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Amoxicillin is one of β-lactam antibiotic in penicillin groups which their presence in surface water and wastewater not only affects water quality but also causes long-term adverse effects on ecosystems and human health due to their resistance to natural biodegradation. The processing of organic waste electrochemically has the advantage of cheap and efficient cost, exhaust gas that does not contain toxic and hazardous materials. We have studied the process of amoxicillin electro-oxidation mediated by a cobalt (III) ion called an electrochemical oxidation process mediated (MEO) in a voltammetry study using a platinum working electrode, Pt/Co(OH)2 and Pt/Co in various supporting electrolytes such as KNO3, NaClO4, Na2SO4 and phosphate buffer solution with concentrations 0.10 M. The results show that the amoxicillin oxidation peaks using the above-mentioned working electrode in various electrolyte solutions are in the potential range of 500-670 mV (Ag/AgCl). The presence of cobalt ions forming complex compounds with amoxicillin causes the oxidation current decreasing that indicates the presence of degradation to amoxicillin.

Degradasi Asam Humat menggunakan Fotokatalis TiO2 yang Disintesis Dalam Cairan Ion 1-Butil-3-Metil-Imidazolium Tetrafluoroborat Riri Enriyani; Muhammad Ali Zulfikar; Anita Alni
Journal Warta AKAB Vol 46, No 1 (2022): Warta AKAB
Publisher : Politeknik AKA Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55075/wa.v46i1.87

Penelitian ini bertujuan untuk mengetahui aktivitas fotokatalitik TiO2 yang disintesis dalam cairan ion 1-buti-3-metil imidzalium tetrafloroborat terhadap degradasi asam humat. Prekursor TiO2 yang digunakan dalam penelitian ini adalah TEOT (Tetra Etil Orto Titanat). Sintesis TiO2 dilakukan dengan metode hidrotermal menggunakan cairan ion 1-buti-3-metil imidzalium tetrafloroborat sebagai pelarut dengan perbandingan BMIM BF4 : air (3:7v/v). Berdasarkan hasil XRD diperoleh bahwa TiO2 yang disintesis dalam cairan ion BMIM BF4 : air (3:7v/v) dan air memiliki fase brokit dan anatase. Hasil analisis spektrofotometer UV Vis -DRS diperoleh nilai bandgap TiO2 yang disintesis menggunakan pelarut BMIM BF4 : air (3:7v/v) sebesar 3,06 eV dan dengan pelarut air sebesar 3,12 eV. Degradasi asam humat oleh TiO2 yang disintesis dengan menggunakan pelarut BMIM BF4 : air (3:7v/v) sebesar 89,15% dan pelarut air sebesar 67,19%.Kata Kunci : Asam humat, fotokatalitik, BMIM BF4, degradasi

Synthesis and Characterization of Molecularly Imprinted Polymers (MIPs) Using Humic Acid Tikarahayu Putri; Muhammad Ali Zulfikar; Deana Wahyuningrum; Iwan Syahjoko Saputra
The Journal of Pure and Applied Chemistry Research Vol 11, No 3 (2022): Edition September-December 2022
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2022.011.03.656

MIPs was synthesized through microwave assisted organic synthesis (MAOS) method by using methyl methacrylate (MMA) as functional monomer, ethylene glycol dimethacrylate (EGDMA) as cross-linker, benzoyl peroxide (BPO) as initiator, N,N-dimethyl formamide (DMF) as porogen solvent, and (HA) as template. The MIPs was successfully synthesized according to the characterization using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM), electron dispersive spectrometer (EDS), and UV spectrophotometer. FTIR shows the other functional groups peaks in the FTIR spectra of NIPs and MIPs after leaching were appeared at the wavelength of 2955 cm-1 corresponded to stretching vibration of C-H of 1459 cm-1 and 1160.06 cm-1 corresponded to the vibration bands of CH3 and O-CH3. EDS shows the MIPs after leaching have the elemental compositions of C, O, and Si with a mass of 78.34, 21.43, and 0.23%. UV spectrum shows the MIPs and NIPs have absorbance values of 0.36 nm and 0.44 nm

Kinetic Models for the Sorption of Methylene Blue From Aqueous Solution by Molecularly Imprinted Polymers Muhammad Ali Zulfikar; Henry Setiyanto
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2016: Proceeding ISETH (International Conference on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

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The research examined the effect of concentration on Methylene Blue (MB) adsorption by using Molecularly Imprinted Polymer (MIP). The experimental data were analyzed by using pseudo-firstkinetic, pseudo-second-kinetic and particle diffusion models. From the experiment, it could be seen that the MB adsorption using MIP decreased with increasing dye initial concentration. The adsorption kinetic data of MB on MIP was well described by a first-second-order model, with the kinetic constants in the range of 0.037- 0.067 min-1. In addition, the results also indicated that the intra-particle diffusion was not the rate limiting step in the MB adsorption process.

Polimer Bercetakan Molekul sebagai Adsorben Zat Warna Metilen Biru Mustapa Mustapa; Muhammad Ali Zulfikar
Jurnal Kimia Fullerene Vol 8 No 1 (2023): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v8i1.497

Polimer bercetakan molekul adalah salah satu jenis material polimer sintetis yang punya kemampuan pengenalan spesifik pada molekul target. Jika dibanding dengan jenis adsorben yang biasa digunakan misalnya karbon aktif, polimer bercetakan molekul punya selektivitas lebih tinggi, serta pemakaian kembali yang lebih besar. Pada penelitian ini telah dilakukan pembuatan polimer bercetakan molekul untuk adsorpsi zat warna metilen biru dengan mengaplikasikan pada larutan dengan berbagai variasi pH dan waktu adsorpsi. Hasil pengujian diperoleh bahwa pH kondisi larutan yang paling baik untuk proses adsorpsi yaitu pada pH 10 dengan persentase penyerapan sebesar 99,07 %, sedangkan waktu penyerapan yang paling optimal pada saat 90 menit dengan mencapai persentase penyerapan sebesar 94,20 %.

ADSORPSI ZAT WARNA TEKSTIL DIRECT BLUE 14 MENGGUNAKAN KITOSAN TERMODIFIKASI DAN KOMPOSIT KITOSAN TERMODIFIKASI BENTONIT Wulan Septiani; Rachmawati Rachmawati; Muhammad Ali Zulfikar
Arena Tekstil Vol 38, No 1 (2023)
Publisher : Balai Besar Tekstil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31266/at.v38i1.8071

Dalam studi ini dipelajari kemampuan adsorpsi dari kitosan dan bentonit yang dimodifikasi untuk menyisihkan warna pada larutan yang mengandung zat warna tekstil Direct Blue 14 (DB 14). Kitosan termodifikasi disintesis dengan penambahan glutaraldehid (KG) sedangkan komposit kitosan termodifikasi-bentonit dilakukan penambahan bentonit pada kitosan termodifikasi (KKGB). Aspek yang dipelajari meliputi pengaruh waktu kontak, dosis adsorben, dan konsentrasi awal larutan zat warna. Mekanisme proses adsorpsi dievaluasi menggunakan model isoterm dan kinetika. Hasil penelitian ini menunjukkan bahwa peningkatan efisiensi penyisihan warna dan penurunan kapasitas adsorpsi KG dan KKGB terjadi pada dosis adsorben lebih tinggi dan konsentrasi awal zat warna lebih rendah. Waktu kesetimbangan adsorpsi DB 14 pada kedua adsorben dicapai pada 20 menit. Dosis adsorben optimum untuk KG dan KKGB dicapai pada dosis masing-masing sebesar 1,0 g/L dan 1,4 g/L, dengan penyisihan zat warna berturut-turut sebesar 91,6% dan 91,8%. Kinetika adsorpsi DB 14 pada KG dan KKGB sesuai dengan model orde kedua semu dengan nilai K2 0,060 g .g-1 .min-1 dan R2 0,999 untuk KG dan K2 0,081 g.mg-1 .min-1 dan R2 0,999 untuk KKGB. Data kesetimbangan adsorpsi DB 14 pada KG paling baik digambarkan oleh model isoterm Langmuir dengan nilai KL 8,482 L/mg dan R2 0,999 sedangkan untuk KKGB paling baik digambarkan oleh model isoterm Freundlich dengan nilai KF 7,157 mg/g dan R2 0,999.

Co-Authors Abdul Wahab Mohammad Afdal Bahri Anita Alni Anita Alni Buchari Buchari Deana Wahyuningrum Deana Wahyuningrum Halimah Fahri Handajaya Rusli Henry Setiyanto Herlina H Indah Permata Cantika Iwan Syahjoko Saputra Lasmaryna Sirumapea Ledyastuti, Mia M. Bachri Amran Muhamad Nasir Muhammad Yudhistira Azis Mustapa Mustapa Nila Tanyela Berghuis Rachmawati Rachmawati Riri Enriyani Tikarahayu Putri Umma, Reza Roisatul Wulan Septiani

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