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All Journal Jurnal Pembangunan dan Alam Lestari Natural B The Journal of Pure and Applied Chemistry Research Science and Technology Indonesia Indonesian Journal of Chemistry

Lukman Hakim

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Brawijaya University, Jl. Veteran, Malang 65145, Indonesia

Author-ID : 5766320

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Physics

Published : 7 Documents Claim Missing Document

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Articles

The Potential of Sumatran Pine Rosin for Reinforcement-Steel Coating in Wet Environment Rudi Hartono; Bagyo Yanuwiadi; Lukman Hakim
Indonesian Journal of Environment and Sustainable Development Vol 9, No 1 (2018)
Publisher : Graduate Program

The corrosion of reinforcement-steel is commonly prevented by applying hydrophobic coating. In this work, the potential of residual product from Sumatran Pine sap distillation, known as Sumatran pine rosin or gondorukem, as a natural and environmentally-friendy resource to coat reinforcement-steel, and an initial assessment on its capability to prevent the corrosion in wet environment were investigated. The experiments were performed using two types of commercially available gondorukem, namely type T and U. The coated reinforcement-steel samples were immersed in collected rainwater and their physical changes were observed periodically for 60 days. The results showed that gondorukem improve the durability of the reinforcement-steel from corrosion in a severe rainwater contact.Keywords: corrosion, coating, gondorukem, hydrophobic, pine rosin, reinforcement bar

The Capability of Hydrilla as a Phytoremediator for River Water Asma Ali Moubark; Lukman Hakim; Amin Setyo Leksono
Indonesian Journal of Environment and Sustainable Development Vol 9, No 1 (2018)
Publisher : Graduate Program

The aim of this study is to investigate the feasibility of Hydrilla as a phytoremediator to improve the quality of river water samples collected from Brantas River, Malang, Indonesia. The phytoremediation process is carried out in static river water samples, and the results show that Hydrilla is capable to augment the reduction the nitrite and ammonia content in the samples, while leaving nitrate and phosphate unaffected within the constraints of the study. Keywords: Ammonia, Hydrilla, Nitrite, Phytoremediation, River Water

Effect of Tripolyphosphate and Ethylene Glycol Diglicidyl Ether on Chitosan Beads for Cr (VI) Adsorption Merpiseldin Nitsae; Armeida D. R. Madjid; Lukman Hakim; Akhmad Sabarudin
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

The research about effect of tripolyphosphate (TPP) and ethylene glycol diglycidyl ether (EGDE) in preparation chitosan beads for Cr(VI) adsorption has been studied. The aim of this research was produced chitosan beads that have the ability to adsorb Cr(VI). Therefore, effect of TPP and EGDE has been studied in the research. Concentrations of TPP has varied 1%, 5%, 10%, and 15% while concentration of EGDE are 1%; 2.5%; 5%; and 7.5%. For the process adsorption chitosan beads with Cr(VI) ions used analysis with Batch method. The result shows optimum condition of chitosan beads was prepared by 5% chitosan: 5% TPP: 5% EGDE at 3 hours immersion. The adsorption capacity was 8.892 mg g-1. Which beads size was different i.e. 509-686 µm.

Chemical Potential of Benzene Fluid from Monte Carlo Simulation with Anisotropic United Atom Model Mahfuzh Huda; Siti Mariyah Ulfa; Lukman Hakim
The Journal of Pure and Applied Chemistry Research Vol 2, No 3 (2013)
Publisher : Chemistry Department, The University of Brawijaya

The profile of chemical potential of benzene fluid has been investigated using Anisotropic United Atom (AUA) model. A Monte Carlo simulation in canonical ensemble was done to obtain the isotherm of benzene fluid, from which the excess part of chemical potential was calculated. A surge of potential energy is observed during the simulation at high temperature which is related to the gas-liquid phase transition. The isotherm profile indicates the tendency of benzene to condensate due to the strong attractive interaction. The results show that the chemical potential of benzene rapidly deviates from its ideal gas counterpart even at low density.

Portable Solid Phase Extraction of Copper, Cadmium and Lead Using Analig ME-02 Chelating Resin and Their Determination by Atomic Absorption Spectrometry Mohamed Abousa Gaza; Lukman Hakim; Akhmad Sabarudin
The Journal of Pure and Applied Chemistry Research Vol 3, No 2 (2014)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (369.44 KB)

ABSTRACT The adsorption of metallic elements on the solid phase chelating resins is probably the most effective separation and preconcentration methods. In this work, portable Solid phase extraction (SPE) was constructed using a commercially available plastic syringe containing certain amount of the Analiq ME-02 chelating resin. The ability of this portable SPE was evaluated through adsorption-desorption process of copper, lead, and cadmium prior their determination by atomic absorption spectrometry (AAS). Some parameters affecting the adsorption-desorption of these heavy metal ions on the Analiq ME-02, which include effect of pH and concentration of eluent ((HNO3), were investigated in detail. It was found that quantitative adsorptions (> 90%) of copper, lead, and cadmium are obtained at all pHs (4-8) examined, whereas 1 M HNO3 was found to be effective for the desorption of these metals with the recoveries in the range of 93 -114%. Such results indicated that Analig ME-02 has excellent chelating ability (pH-independent) for the adsorption of copper, lead, and cadmium, while portable SPE system provides easiness and effectiveness for collection/preconcentation of metallic elements.

Structure and Dynamics of Curcumin Encapsulated Lecithin Micelles: A Molecular Dynamics Simulation Study Lukman Hakim; Diah Mardiana; Urnik Rokhiyah; Maria Lucia Ardhani Dwi Lestari; Zubaidah Ningsih
Science and Technology Indonesia Vol. 6 No. 3 (2021): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Curcumin is a natural product with potential pharmaceutical applications that can be augmented by drug delivery technology such as nano emulsion. Our study focuses on microscopic structural and dynamics response of curcumin encapsulation in micellar system with lecithin as a natural surfactant under variations of composition and temperature using molecular dynamics (MD) simulations. The results highlight the self-assembly of lecithin micelle, with curcumin encapsulated inside, from initial random configurations in the absence of external field. The variation of composition shows that lecithin can aggregate into spherical and rod-like micelle with the second critical micelle concentration lies between 0.17-0.22 mol dm−3. The radial local density centering at the micelle center of mass shows that the effective radius of micelle is indeed defined by the hydrophilic groups of lecithin molecule and theencapsulated curcumin molecules are positioned closer to these hydrophilic groups than the innermost part of the micelle. The spherical micelle is shown to be thermally stable within the temperature range of 277-310 K without a perceivable change in the spherical eccentricity. The dynamics of micelle are enhanced by the temperature, but it is shown to be insensitive to the variation of lecithin-curcumin composition within the studied range. Simulation results are in agreement with the pattern obtained from experimental results based on particle size, polydispersity index, and encapsulation efficiency.

Activity and Selectivity of Mesoporous Silica Catalyst for Hydrocracking Process of Used Palm Oil into Biogasoline Ahmad Suseno; Karna Wijaya; Edy Heraldy; Lukman Hakim; Wahyu Dita Saputri; Gunawan Gunawan
Indonesian Journal of Chemistry Vol 23, No 2 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.70460

Research on the synthesis of mesoporous silica catalyst, as well as its activity and selectivity in the hydrocracking of used palm oil, has been carried out. The research involved the preparation of mesoporous silica catalyst by varying the volume ratio of TEOS:CTAB at 2:1, 4:1, and 8:1, then calcined at 500 °C. Synthesis success was confirmed by FTIR, XRD, SEM-EDX, GSA, and hydrocracking selectivity by GC-MS analysis. The results showed that the more TEOS added, the silica bond composition, crystallinity, pore size, and product selectivity increased. The best catalyst performance was obtained from a TEOS:CTAB ratio of 8:1 at a calcination temperature of 500 °C (MCT81-500), which indicated the presence of Si-OH and Si-O-Si groups with a Si percentage of 45.31%, pore size diameter of 31.912 nm, and a total pore volume of 0.040 cc/g. In addition, the application of MCT81-500 in the hydrocracking process of used palm oil can produce a bio-gasoline (C5-C12) and kerosene (C12-C15) of 92.24 and 7.76 wt.%, respectively. This study shows that mesoporous silica has good potential for catalytic activity to convert used cooking oil waste into an environmentally friendly energy source.

Co-Authors Ahmad Suseno Akhmad Sabarudin Akhmad Sabarudin Amin Setyo Leksono Armeida D. R. Madjid Asma Ali Moubark Bagyo Yanuwiadi Diah Mardiana Edy Heraldy Gunawan Gunawan Karna Wijaya Mahfuzh Huda Maria Lucia Ardhani Dwi Lestari Merpiseldin Nitsae Mohamed Abousa Gaza Rudi Hartono Siti Mariyah Ulfa Urnik Rokhiyah Wahyu Dita Saputri Zubaidah Ningsih

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