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All Journal Jurnal Riset Kimia Alchemy Jurnal Penelitian Kimia Communications in Science and Technology Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Pengabdian Masyarakat Indonesia Makara Journal of Science Molekul: Jurnal Ilmiah Kimia International Journal of Renewable Energy Development
Eddy Heraldy
Department of Chemistry, University of Sebelas Maret, Jl. Ir. Sutami 36A Kentingan Surakarta 57126
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Materials Science & Nanotechnology Public Health Social Sciences

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Journal : Makara Journal of Science

 1 
SYNTHESIS OF Mg/Al HYDROTALCITE-LIKE FROM BRINE WATER AND ITS APPLICATION FOR METHYL ORANGE REMOVAL: A PRELIMINARY STUDY Heraldy, Eddy; Triyono, Triyono
Makara Journal of Science Vol. 15, No. 1
Publisher : UI Scholars Hub

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The objective of this research is to synthesis of Mg/Al hydrotalcite-like (Mg/Al HTlc) from brine water and its application as a methyl orange (MO) removal. The research initiated with the synthesis of Mg/Al HTlc from brine water, which is well known as the desalination process wastewater. Characterization of the Mg/Al HTlc synthesized was confirmed through X-ray Diffraction and FT-IR Spectroscopy. The determination of optimum acidity, adsorption rate, and energy and capacity adsorption were studied. The result showed that pH 4 was the optimum acidity for the adsorption of MO on Mg/Al HTlc. MO was adsorbed at pseudo-second order adsorption rate of 1.03 × 105 g mol-1 min-1 on the Mg/Al HTlc. The adsorption data fitted well into the linearly transformed Freundlich equation.
A Ferrocene-Modified Carbon Electrode Prepared from Coconut Shell Char for Cu(II) Detection in Water Aulia, Nabila Putri; Rahmawati, Fitria; Masykur, Abu; Heraldy, Eddy
Makara Journal of Science Vol. 30, No. 1
Publisher : UI Scholars Hub

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A ferrocene (Fc)-modified carbon electrode was prepared from coconut shell char (CSC), which was activated with NaOH to produce an activated coconut shell carbon (Ac-CSC). The carbon electrode was designed as a printed-carbon electrode consisting of working, counter and reference electrodes in a single piece, called a screen-printed carbon electrode, or SPCE. An Fc solution was applied to the working electrode part at 10%, 20% and 30% mass of the SPCE, producing an SPCE-Fc as an electrochemical sensor for Copper ions Cu(II) detection. The prepared activated carbon was analysed by XRD, FTIR, SEM/EDX, surface area analysis and impedance measurement to determine its diffraction pattern, available specific functional groups, morphology, elemental content, surface area and electrical conductivity. The results showed that CSC consists of 52.89% amorphous carbon, 19.65% nitrogen and 23.12% oxygen. FTIR analysis showed C=O, C=C, C-H, C-O, O-H, N-H and C-S vibrations. The Ac-CSC provided an electrical conductivity rate of 26.025 S/cm. Cyclic voltammetry analysis of the Cu(II) solution with SPCE-Fc10% provided the highest current density among the other Fc contents. Therefore, a further study used SPCE-Fc10% to determine the limit of detection (LoD), interference effects, pH and scan rate effects, the repeatability of the analysis and the reproducibility of SPCE-Fc10% for Cu(II) detection. The LoD was 0.055 mM. The electrode fabrication also showed good reproducibility, as evidenced by a repeatability coefficient (R) of 0.06. The interference test showed that the SPCE-Fc10% selectively detected Cu(II), even in the presence of 5% volume of Pb(II) and Co(II) in the Cu(II) solution.
Co-Authors Abu Masykur Ahmad Suseno Anas, Dimas Fauzi Athoillah, Muhammad Ibnu Aulia, Nabila Putri Budianto, Anantasya Indah Budiman, Anatta Wahyu Dian Maruto Widjonarko Dian Maruto, Dian Fadlulloh, Zaki Fitria Rahmawati I F Nurcahyo, I F Iqmal Tahir Irina C Riasdianti, Irina C Ivandini Tribidasari Anggraningrum Karna Wijaya Khoirina Dwi Nugrahaningtyas Liestyabudi, Adelia Pebrina Listiani, Nofa Eka Lukman Hakim Maharani, Salsabila Nugrahaningtyas, Khoirina D Nur Aini Nurcahyo, I. F. Oh, Won-Chun Paramartha, I Gusti Ayu Filia Putri, Denis Octareta Amelia Qurrotul'aini, Nisriina 'Abidah Rahmawati, F Remi Ayu Pratika Ridwan, Qanita Sabiila Gusti, Aji Indo Safitri, Rosi Nur Saputri, Dini Deviana Saviola, Aldino Javier Setyono, Risandrika Dwijayanti Putri Sigit Wiwiet Saputro, Sigit Wiwiet Subarno, Alga Amolu Triyono Triyono Wati, Nori Laras Yuniawan Hidayat