25 articles in this issue
Wahyu Tri Cahyanto,Aris Haryadi,Sunardi Sunardi,Abdul Basit,Yulin Elina
We report the different way to explain the nature of water molecule (H2O) adsorption on the platinum (Pt) surfaces with low Miller index, i.e., (100), (110) and (111). Here, we perform periodic density functional theory (DFT) calculations to analyze the c... see more
Yuniawan Hidayat,Ria Armunanto,Harno Dwi Pranowo
Ab initio of Quantum Mechanics Charge Field Molecular Dynamic (QMCF-MD) of K(I) ion in liquid ammonia has been studied. A Hartree-Fock level of theory was coupled with LANL2DZ ECP basis set for K(I) ion and DZP (Dunning) for ammonia. Two regions as first ... see more
Arini Wresta,Aep Saepudin
Biogas resulted from anaerobic digestion of organic compounds have various methane content depend on the type of the degraded material. The methane content of biogas is range between 40–80% that influence the heating value and combustion characteristic of... see more
Fatma Fatma,Poedji Loekitowati Hariani,Fahma Riyanti,Wiwin Sepriani
The alumina-activated carbon has the ability to adsorb and desorb the procion red MX-5B. The research evaluated the influence of desorption agent, contact time, and temperature on desorption process of procion red MX-5B dye with alumina-activated carbon c... see more
Restu Kartiko Widi,Sharifah Bee Abd Hamid
The high-throughput experimentation technique was used to verify the testing conditions due to the effects of catalyst structure modifications and/or due to reaction parameter variation in parallel. In this paper, the design of experiment and catalytic re... see more
Edi Priyo Utomo,Marina Marina,Warsito Warsito,Egi Agustian
Until now, the patchouli oil is the largest commodity export of essential oil for Indonesia. But the price of patchouli oil is often unstable due to the quality of oil which fluctuates depending on the components. To improve the performance and quality of... see more
Rizky Tetrisyanda,Annas Wiguno,Rizqy Romadhona Ginting,M. Chadiq Dzikrillah,Gede Wibawa
This study successfully improved the performance of oxidative desulfurization method to reduce sulfur content from residue oil (condensate) with modifications of oxidation and extraction steps which was repeated for several stages. Residue oil used in thi... see more
Siti Mariyah Ulfa,Rizka Fauzia Ohorella,Caterina Widya Astutik
Sequential condensation and hydrodeoxygenation reaction were perform using autoclave batch reactor in the presence of water as a solvent. The condensation of furfural and acetone was performed using MgO catalyst followed by hydrodeoxygenation using mix ca... see more
Nita Kusumawati,Pirim Setiarso,Maria Monica Sianita,Supari Muslim
Asymmetric polysulfone (PSf) membrane is prepared using phase inversion method and blending with polyvinylidene fluoride (PVDF) on the gauze solid support. Casting solution composition optimization has been done to get PSf/PVDF membrane with best characte... see more
Behzad Shamsi Zadeh,Hossein Esmaeili,Rauf Foroutan
Heavy metals are soluble in the environment and can be dangerous for many species. So, removal of heavy metals from the water and wastewater is an important process. In this study, an adsorbent made of eggshell powder was employed to remove cadmium ions f... see more
Luma Majeed Ahmed,Shaymaa Ibrahim Saaed,Ashraff Aziz Marhoon
The aim of this work was to apply the many various oxidation agents namely H2O2, K2S2O8 and Fe2+ on the aqueous solution of vitamin B12 with the presence of ZnO. The results indicated that the use of the mixture of H2O2 and K2S2O8 in suspension of vitamin... see more
Aman Sentosa Panggabean,Subur P Pasaribu,Farida Kristiana
The research about utilization of nitrogen gas as a carrier gas in the determination of Hg ions by using Cold Vapor-Atomic Absorption Spectrophotometer (CV-AAS) method has been conducted. To optimize the measurement results, several parameters that affect... see more
Aris Mukimin,Agus Purwanto
In general, wastewater treatment by physical, chemical and biological methods are only focused on TSS, BOD and COD removals that the effluent still contains anion pollutant as NO2- and S2-. Electrochemical technology is a proper method for those pollutant... see more
Amina Abdel Meguid Attia,Mona Abdel Hamid Shouman,Soheir Abdel Atty Khedr,Nevin Ahmed Hassan
The goal of this article describes the potential of utilizing jojoba leaves and also modified with chitosan as an efficient adsorption materials for Congo red dye removal in a fixed-bed column. Inlet dye concentration, feed flow rate and bed height had a ... see more
Rudy Syah Putra,Febby Yulia Hastika
The garbage disposal management using landfill system produces an unpleasant odor of wastewater (i.e. leachate) which can disrupt the groundwater equilibrium in the rainy season. The combination of electro-assisted and phytoremediation which is hereinafte... see more
Muhammad Ridwan Septiawan,Dian Permana,Sitti Hadijah Sabarwati,La Ode Ahmad,La Ode Ahmad Nur Ramadhan
Chitosan was modified by maleic anhydride, and it was then functionalized using heterogeneous and blending method to obtain the membrane. The results of the reaction between chitosan with maleic anhydride were signed by the new peak appears around 1475 cm... see more
Sri Wahyuni,Eko Sri Kunarti,Respati Tri Swasono,Indriana Kartini
A study of TiO2(rod)-SiO2 composites coated with polyaniline (PANI) has been performed. PANI was synthesized through in-situ polymerization of aniline at various concentration (0.0137, 0.0274, and 0.0411 M) on the composite under acidic condition. PANI wa... see more
Suprapto Suprapto,Zahrotul Istiqomah,Eko Santoso,Ahmad Anwarud Dawam,Didik Prasetyoko
Alumina extraction from red mud has been investigated by magnetic separation with three-step treatment. First, the addition of red mud with Na2CO3 (12 wt%) and heated at 110 °C for 4 h. The second step was carbon reduction using coal with mass ratio of (r... see more
Eka Putra Ramdhani,Tri Wahyuni,Yatim Lailun Ni’mah,Suprapto Suprapto,Didik Prasetyoko
Mines in Bintan were producing bauxite for many years. The production process of bauxite to alumina produced much red mud. From X-ray Fluorescence (XRF), alumina content on Bintan’s red mud was 28.87 wt.%. This research was studying on the extraction alum... see more
Aminuddin Debataraja,Robeth Viktoria Manurung,Lia A.T.W. Asri,Brian Yuliarto,Nugraha Nugraha,Bambang Sunendar
This paper report on polyol method for Pd doped tin oxide-graphene nanocomposite thin film. XRD result shows sharp peaks at certain 2? value and match with tin oxide, graphene, and Pd database. FTIR result shows peak from alcohol chain for –OH strong bond... see more
Ismojo Ismojo,Abdul Aziz Ammar,Ghiska Ramahdita,Anne Zulfia,Mochamad Chalid
Micro-fibrillated cellulose (MFC) derived from natural fibre is continuously gaining interest to produce an environmentally-friendly material, due to economic and ecological reasons. In consequence, sorghum is one of the most-cultivated crops that usually... see more
Nurul Nabilah Razali,Iis Sopyan
Calcium phosphate cement (CPC) has been synthesized via a straightforward hydrothermal route. Calcium oxide and ammonium dihydrogen phosphate were used as calcium and phosphate precursors. The precursors were refluxed in distilled water at 90–100 °C and d... see more
Yum Eryanti,Rudi Hendra,Tati Herlina,Adel Zamri,Unang Supratman
Three piperidone curcumin analogues (N-methyl-(3E,5E)-3,5-bis-(2-chlorobenzylidene)-4-piperidone (1), N-methyl-(3E,5E)-3,5-bis-(3-bromobenzylidene)-4-piperidone (2) and N-methyl-(3E,5E)-3,5-bis-(4-chlorobenzylidene)-4-piperidone (3)) were synthesized from... see more
Dian Pribadi Perkasa,Erizal Erizal,Tri Purwanti,Alva Edy Tontowi
Gel contraction of alginate during ionic crosslinking at sol phase was reduced by blending with gelatin solution due to intermolecular interaction and chain entanglement. The semi-interpenetrated network (semi-IPN) of wound dressing hydrogels were prepare... see more
Wiranti Sri Rahayu,Abdul Rohman,Sudibyo Martono,Sudjadi Sudjadi
Beef meatball is one of the favorite meat-based food products among Indonesian community. Currently, beef is very expensive in Indonesian market compared to other common meat types such as chicken and lamb. This situation has intrigued some unethical meat... see more