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All Journal ALCHEMY Jurnal Penelitian Kimia SEMAR Makara Journal of Science Molekul: Jurnal Ilmiah Kimia ENVIRO: Journal of Tropical Environmental Research
Abu Masykur
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Jl. Ir. Sutami 36A Surakarta 57126
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences Transportation

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Rice Husk Ash-Derived Magnetized Silica Functionalized with TMPDT for Heavy Metal Ion Removal Hastuti, Sri; Irfani, Hasna Haifa; Nuzula, Rifania Aura; Saraswati, Teguh Endah; Masykur, Abu; Purnawan, Candra; Wibowo, Atmanto Heru; Fitriana, Dina
Molekul Vol 21 No 1 (2026)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2026.21.1.17837

Abstract

ABSTRACT. The removal of toxic heavy metal ions from water remains a critical environmental challenge. In this study, a novel magnetized mesoporous silica adsorbent functionalized with N1-(3-trimethoxysilylpropyl) diethylenetriamine (Fe₃O₄@SiO₂@meso-SiO2@TMPDT), synthesized from rice husk ash, was developed for the adsorption of Cd(II) and Pb(II) ions. The characterization of the adsorbent by FTIR, SEM-EDX, and TGA confirmed the successful synthesis of magnetized and TMPDT-functionalized silica derived from rice husk ash (Fe₃O₄@SiO₂@meso-SiO₂@TMPDT). The adsorption study consists of the determination of optimum pH, the adsorption kinetics study, and the adsorption isotherm. Batch adsorption studies showed that the optimal pH values for Cd(II) and Pb(II) adsorption were 4 and 3, respectively. The adsorption kinetics for both metal ions followed a pseudo-second-order model. Furthermore, the adsorption isotherms fitted both the Langmuir and the Freundlich models with comparable R² values. The maximum adsorption capacities (Qₘ) of Fe₃O₄@SiO₂@meso-SiO₂@TMPDT for Cd(II) and Pb(II) were 28.089 and 24.498 mg/g, respectively. These findings demonstrate that the developed adsorbents offer an effective and sustainable approach for heavy metal removal from aqueous systems. Keywords: adsorption, heavy metal ions, magnetized silica, rice husk ash, TMPDT
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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Abstract

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.
Synthesis and Characterization Of C-Hexyl Calix[4]Resorcinarena from Resorcinol-Heptanal Condensation Handayani, Desi Suci; Amin, Zainal Arifin Almaqqomul; Kusumaningsih, Triana; Masykur, Abu
ALCHEMY Jurnal Penelitian Kimia Vol 10, No 1 (2014): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.10.1.730.49-53

Abstract

Synthesis of  C-hexyl  calix[4]resorcinarene  through condensation reaction between resorcinol  and  heptanal  with  HCl  catalyst  has  been  investigated.  Synthesis  conducted  by the ratio of resorcinol: heptanal (1:1) using reflux for 6 hours in ethanol. Structural  analysis of  the  product  was  done  by  FTIR  and 1 H-NMR  spectroscopy,  while  the  characterization was  done  by  determining  melting  point.  The  product  was  golden  brown  powder  with  a yield 99.43%  and  melting point more than 300 °C.  Structural analysis with FTIR and 1 HNMR  known  vibration  and  signals  characteristic  of  calix[4]resorcinarena  group, the vibrations of the CH  bridge. Vibration of CH bridge appearance at wave number 1445 cm-1 and 1456  cm-1, while signal of CH bridge appearance at chemical shifts from  4.17 to 4.21 ppm.
Pemberdayaan Masyarakat melalui Pembuatan Detergen Cair Alami Berbasis Buah Lerak untuk Mengurangi Penggunaan Bahan Kimia Berbahaya Masykur, Abu; Fitriana, Dina; Hastuti, Sri; Wibowo, Atmanto Heru; Purnawan, Candra; Cinta, Denna Artika; Nabilla, Khairunnisa
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 14, No 2 (2025): November
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v14i2.109413

Abstract

Aktivasi peran masyarakat dalam menjaga lingkungan perairan penting dilakukan untuk menumbuhkan kesadaran masyarakat. Salah satu caranya adalah melalui edukasi tentang pentingnya menggunakan bahan rumah tangga yang ramah lingkungan. Kegiatan pengabdian dilakukan dengan melakukan sosialisasi kepada kelompok PKK di Perumahan Pondok Baru Permai IV, Kelurahan Ngesrep, Kecamatan Ngemplak, Kabupaten Boyolali mengenai dampak penggunaan detergen kimia yang berlebihan terhadap lingkungan. Pada sosialisasi ini, dikenalkan detergen ramah lingkungan yang berbahan dasar buah lerak yang kemudian diikuti dengan demonstrasi dan pelatihan. Keberhasilan kegiatan diukur dengan menganalisis hasil pretest dan posttest. Hasil menunjukkan adanya peningkatan pemahaman yang ditunjukkan oleh hasil posttest yang meliputi (1) anggota kelompok PKK telah mengetahui kandungan dalam detergen dan isu pencemaran lingkungan karena detergen komersial yang dievaluasi melalui peningkatan nilai rata-rata yang semula 87 pada pretest menjadi 99 pada postest. (2) Anggota kelompok PKK memahami cara membuat detergen cair berbasis lerak. Dengan demikian, kegiatan pengabdian ini memberikan implikasi mampu meningkatkan pengetahuan anggota kelompok PKK mengenai dampak penggunaan detergen konvensional, bahan alam yang potensial untuk digunakan sebagai bahan dasar detergen alami ramah lingkungan, dan keterampilan dalam membuat detergen cair dari bahan alam.
Sinergisme Campuran Tanah Andisol dan Pasir Foundry sebagai Adsorben Ion Cu (II) pada Limbah Industri Pelapisan Logam Pranoto, Pranoto; Masykur, Abu; Prihanandya, Rania Satwika Putri
ENVIRO: Journal of Tropical Environmental Research Vol 24, No 1 (2022): Maret
Publisher : Center for Environmental Research, LPPM, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/enviro.v24i1.65039

Abstract

Research has been carried out on the synergism of a mixture of andisol soil and foundry sand as Cu(II) ion adsorbent. This study aims to determine the effect of mixing andisol soil and foundry sand on the absorption of Cu (II) ions and to study the type of isotherm and its adsorption kinetics model. The adsorbent was activated with 3 M NaOH. The acidity of the adsorbent was analyzed using the specific total acidity test method. The final concentration of Cu (II) ions was analyzed using AAS (Atomic Absorption Spectroscopy). The optimum adsorption conditions were obtained based on variations in composition, pH, and contact time. The adsorbent was made with variations in the composition of andisol: foundry sand 100:0, 75:25, 50:50, 25:75 and 0:100 (w/w). The effect of adsorption conditions was carried out by varying the pH of the copper (Cu) solution from 3-7. The effect of contact time was varied at 15-135 minutes with 15 Minute intervals.
Co-Authors Amin, Zainal Arifin Almaqqomul Atmanto Heru Wibowo Aulia, Nabila Putri Bintang Junita Siagian, Bintang Junita Buchari Buchari Candra Purnawan Cinta, Denna Artika Desi Suci Handayani Eddy Heraldy Fitria Rahmawati Fitriana, Dina Hajar Prasetyo, Hajar Hindun Wulandari, Hindun Indah Rizki Fitriani, Indah Rizki Indra Noviandri Irfani, Hasna Haifa Laksono Trisnantoro Nabilla, Khairunnisa Nuzula, Rifania Aura Pranoto Pranoto Prihanandya, Rania Satwika Putri Sayekti Wahyuningsih Sri Hastuti Teguh Endah Saraswati Tri Martini Triana Kusumaningsih Weny Pudiastuti, Weny Zainal Arifin Almaqqomul Amin, Zainal Arifin