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All Journal Jurnal Penelitian Saintek Jurnal Ilmiah Farmasi EKSAKTA: Journal of Sciences and Data Analysis Jurnal Teknoin Reaktor Jurnal Ilmu Dasar Jurnal technoscientia Bulletin of Chemical Reaction Engineering & Catalysis Journal of Mathematical and Fundamental Sciences Science and Technology Indonesia Indonesian Journal of Chemistry Molekul: Jurnal Ilmiah Kimia ASEAN Journal of Chemical Engineering Acta Chimica Asiana JURNAL TEKNOLOGI TECHNOSCIENTIA IJCR (Indonesian Journal of Chemical Research) Jurnal Pijar MIPA Khazanah: Jurnal Mahasiswa Bulletin of Chemical Reaction Engineering & Catalysis

Is Fatimah

Department Of Chemistry, Islamic University Of Indonesia, Jl. Kaliurang KM 14.5 Sleman Yogyakarta 55584

Author-ID : 264427

Religion Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences

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The Effect of CaO Weight from Snail Shell (Pilla Ampullacea) On Its Activity As Heterogeneous Catalyst on Biodiesel Conversion Of Bran Oil Hikmah Fatmawati; Wellyana Puspitasari; Rohini Pujiarti; Sesy Ardyanti; Is Fatimah
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 18, ISSUE 1, February 2018
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol18.iss1.art7

Research on utilization of snail (Pilla ampullacea) shell as CaO source for biodiesel conversion from rice bran oil has been investigated. CaO was derived by calcining the shell at pada 900oC for 2 h. The powder obtained from the process was characterized using x-ray diffraction (XRD), energy dispersive x-ray (EDX), Fourier-Transform Infra-red (FTIR) and surface basicity test. In order to test the activity of catalyst, effect of catalyst weight on the yield of conversion as studied. Results show that the derived material is composed from dominantly CaO and the material demonstrates activity in rice bran conversion into biodiesel. Compared to NaOH, the CaO catalyst exhibits more effectively active as shown by the higher yield. From varied catalyst weight, it is obtained that at the range of 2.5-10% catalyst weight does not affect significantly to the increasing yield.

Composite of Polylactic Acid/Chitosan/Ag-Hydroxyapatite Synthesized Using Turmeric Leaves Extract-Mediated Silver Nanoparticle and Snail Shell as Antibacterial Material Rahmania Audita; Khoirunisa khoirunisa; Hasna' Azizah Azzahra'; Bambang Hernawan Nugroho; Habibi Hidayat; Is Fatimah
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 2, ISSUE 2, August 2021
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol2.iss2.art5

The development of an antibacterial composite of polylactic acid/chitosan/silver nanoparticle-doped hydroxyapatite has been synthesized. The composite was prepared using the silver nanoparticles (AgNPs) green synthesized by using turmeric (Curcuma longa Linn) leaves extract-mediated AgNPs and snail shell as biogenic calcium for hydroxyapatite synthesis. The precipitation method of hydroxyapatite by the doping of AgNPs was the first step, followed by composting with polylactic acid and chitosan as the polymer binder. Physicochemical characterization of the material was studied by using XRD, SEM, and FTIR analyses, and the antibacterial catalytic performance was examined against Escherichia coli (E. coli). The results showed that the synthesized AgNPs are within the <100 nm range in size and not significantly influence the crystallinity of the Ag/HAp. The composite materials maintained the antibacterial activity against E. coli.

Microwave and Ultrasound Irradiations for the Intensification on Biodiesel Productions: a Mini Review Suresh Sagadevan; Amri Yahya; Is Fatimah
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 2, ISSUE 2, August 2021
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol2.iss2.art6

This mini review discusses the roles of intensification process in biodiesel production. Due to the Twelve Principles of Green Chemistry as a foundation for sustainability, the shorter time and efficient energy consumption highlighted the use of microwave and ultrasound irradiation for increasing conversion of biodiesel.The principles and some examples for the process are exhibited. It can be summarized that the intensifications are important innovations, but some optimization and life cycle analysis are required in applicable scales.

PERANAN KATALIS TiO2/SiO2-MONTMORILLONIT PADA REAKSI KONVERSI SITRONELAL MENJADI ISOPULEGOL Is Fatimah; Dwiarso Rubiyanto; Torikul Huda
Reaktor Volume 12, Nomor 2, Desember 2008
Publisher : Dept. of Chemical Engineering, Diponegoro University

Catalytic conversion of citronellal to isopulegol over TiO2/SiO2-montmorillonite catalyst was studied for citronellal isolated from Cymbopogon leaf oil. The role of physico-chemical characteristics of montmorillonite and SiO2-montmorillonit catalyst on total conversion, activity and selectivity to produce isopulegol was studied. Activity test was conducted for citronellal cyclication for 4 hour. The total conversion, catalyst activity and catalyst selectivity to produce isopulegol were evaluated based on product composition obtained by GC-MS analysis. The experimental result showed that TiO2/SiO2-montmorillonite plays role in the increase of total conversion significantly from 87.80% over SiO2-montmorillonit and 85.38% over natural montmorillonite become 95.53%. Total conversion and selectivity of the catalyst to produce isopulegol increase could be related to Lewis acidity of TiO2/SiO2-montmorillonite, and also specific surface area enhancement. However, in the range of 1:1.25 to 1:5.0 catalyst to citronellal mass ratio, there was no influence on total conversion and selectivity to produce isopulegol. This may be caused by dominant influence of Lewis acidity compared to other physico-chemical characteristic of material. Kinetics study of the reaction showed that TiO2 dispersion on SiO2-montmorillonite almost doubles the reaction rate constant with the factor of 1.955. Konversi katalitik sitronelal menjadi isopulegol menggunakan katalis TiO2/SiO2-montmorillonit dipelajari terhadap sitronelal hasil isolasi minyak daun sereh. Peranan karakter fisikokimiawi material katalis montmorillonit alam dan SiO2-montmorillonit terhadap konversi total, aktivitas dan selektivitas dalam pembentukan isopulegol dipelajari. Uji aktivitas katalis dilakukan pada reaksi siklisasi sitronelal selama 4 jam. Konversi total, aktivitas katalis dan selektivitas terhadap isopulegol dihitung berdasar perubahan komposisi hasil reaksi yang ditentukan menggunakan GC-MS. Hasil penelitian menunjukkan bahwa katalis TiO2/SiO2-montmorillonit berperanan meningkatkan konversi total reaksi secara signifikan dari sebesar 87,80% pada penggunaan SiO2-montmorillonit dan 85,38% dengan menggunakan montmorillonit alam menjadi sebesar 95,53%. Peningkatan konversi total dan selektivitas terhadap isopulegol berkaitan dengan keasaman Lewis yang dimiliki oleh TiO2/SiO2-montmorillonit serta peningkatan luas permukaan spesifik material. Namun pada rentang perbandingan massa katalis terhadap sitronelal 1:1,25 hingga 1:5,0 tidak berpengaruh signifikan terhadap konversi total dan selektivitas produk isopulegol. Hal ini mungkin disebabkan peranan keasaman Lewis lebih dominan terhadap sifat-sifat fisikokimiawi material katalis. Studi kinetika reaksi menunjukkan bahwa dispersi TiO2 pada SiO2-montmorillonit meningkatkan konstanta laju reaksi dengan faktor sebesar 1,955.

PREPARASI Fe3+/TiO2- MONTMORILLONIT SEBAGAI KATALIS PADA DEGRADASI ZAT WARNA AZO Is Fatimah; Tuty Alawiyah; Iwan Sumarlan
Reaktor Volume 14, No. 4, OKTOBER 2013
Publisher : Dept. of Chemical Engineering, Diponegoro University

Dalam penelitian ini dilakukan preparasi material Fe3+/TiO2-Montmorillonit dan uji aktivitasnya sebagai katalis pada degradasi senyawa azo. Keberhasilan preparasi material dipelajari melalui karakterisasi menggunakan X-ray Diffraction, BET surface area analyzer dan Diffuse Reflectance UV-Visible. Peranan katalitik material hasil preparasi pada degradasi senyawa azo: metil jingga(MO) dan metilena biru(MB) dipelajari melalui studi kinetika reaksi dengan mekanisme mirip foto-Fenton (Photo-Fenton like mechanism). Hasil penelitian menunjukkan keberhasilan preparasi material Fe3+/TiO2-Montmorillonit serta tercapainya tujuan penggunaannya sebagai katalis untuk degradasi zat warna azo melalui mekanisme Photo-Fenton like. Simulasi terhadap data kinetika menunjukkan bahwa degradasi kedua zat warna azo dengan katalis hasil preparasi mengikuti model kinetika Langmuir-Hinshelwood dengan nilai k dan K untuk MO berturut-turut adalah sebesar 8,83x10-7 M/detik dan 328,29 dan untuk MB sebesar 4,56x10-5 M dan 555,60. Nilai konstanta laju reaksi dan konstanta adsorpsi-desorpsi reaksi degradasi kedua zat warna menjelaskan peranan mekanisme interaksi permukaan dalam proses katalisis.

Analysis of Quantitative Structure and Solubility Relationship for Organophospate Active Compounds Linear Model and Cluster Model Approach Is Fatimah; Jaka Nugraha
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (234.684 KB)

Study on quantitative solubility and structure relationship of organophospate pesticide has been conducted. Aim of this research is to analyze relationship between characteristic physical properties (water solubility) of pesticide with molecular structure by a model that can be used to predict physical properties of new compound proposed to be pesticide compound. Analysis was done for 52 organopospate compounds and its water solubility data. The model predicted by 39 fagmental descriptor based on spesific structure of organophospate compound. Analysis used in modeling are cluster analysis, one way analysis of variance (ANOVA) and regression analysis. Result show water solubility of the pesticide compound positive effect by functional group of P=O, N-primer and C=O in the structure. Functional group of S (sulphur), fen (phenil) , C-aromatic, C1-C2, C3-C4, C5-C6, Ortho Aromatic, P=S, C-Cl and log(Mr) decrease water solubility. The model resulted by regression analysis using stepwise and best subset method is : Ln(1+watsol) = 11.0 - 0.352 n C (aromatic) - 5.41 n (P=S) - 1.55 n (C-Cl), F-value = 32.43 (sign. 0,000) , R2 = 0.67 dan S=2.643. The model can be used to predict the organoposphate water solubility.Keywords : QSPR, ANOVA, regression analysis, organophospate pesticide

Hydrothermal Synthesis and Photocatalytic Activity of NiO Nanoparticles under Visible Light Illumination J. Anita Lett; Suresh Sagadevan; Getu Kassegn Weldegebrieal; Is Fatimah
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 2 Year 2022 (June 2022)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.2.13680.340-349

In this present study, Nickel oxide (NiO) nanoparticles (NPs) have been synthesized using the hydrothermal method and characterized using powder X-ray Diffraction (XRD), UV-vis and Fourier Transform Infra Red (FTIR) spectroscopies, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-ray (EDX) methods. The result of the characterization indicates that the synthesized sample has a pure cubic phase of NiO with roughly spherical shape morphologies and respective estimated crystallinity and microstrain values of about 78% and 5.1. Test of the photocatalytic activity of the synthesized sample towards the model contaminant dye methylene blue (MB) shows a degradation efficiency of 46% in a period of 2 h under nature sunlight irradiation at natural pH and that the reaction could satisfactorily describe both pseudo-first-order and pseudo-second-order kinetic models. So, this synthesis method may potentially be used for the effective elimination of toxic organic pollutants from water and wastewater over prolonged exposure under natural sunlight without adding any oxidant or adjusting the pH of the reaction medium. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Role of EDAPTMS-Functionalized Silica Derived from Rice Husk Ash in the Adsorption Kinetics of Cu(II), Cr(III), and Pb(II) Is Fatimah; Tesha Yuliarni; Dian Riyanti
Bulletin of Chemical Reaction Engineering & Catalysis 2018: BCREC Volume 13 Issue 2 Year 2018 (August 2018)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.13.2.1587.331-340

In the present work, synthesis of (3-ethylene diamino propyl)-trimethoxysilane (EDAPTMS)-functionalized silica prepared from rice husk ash (RHA) and its adsorptivity of Cu(II), Cr(III), and Pb(II) in an aqueous solution was investigated. The EDAPTMS-functionalized silica was prepared by destruction of RHA with 4 M NaOH solution followed by functionalization by using the sol-gel method. The interaction was engaged by mixing EDAPTMS with silica gel in an acid condition followed by aging. The gel obtained from the procedure was analyzed by using X-ray diffraction (XRD), infrared spectroscopy (FTIR), and a surface area analyzer (SAA). Effect of EDAPTMS content on the material character and adsorption capability are the focuses of the study. The adsorption study was conducted in a batch adsorption system for Cu(II), Cr(III), and Pb(II) mixed solution and metal ion analyses were performed by atomic absorption spectrophotometry. The results showed that enhancement of physicochemical character was obtained after modification Based on the quantitative analysis of each metal, the kinetics of adsorption of a single solution of each ion and mixed solutions were studied. as shown by the increasing specific surface area as well as the increasing adsorption rate of the metal ions along increasing EDAPTMS content. Langmuir and Freundlich models were utilized for the kinetic study. Adsorption selectivity and adsorption kinetics were found to be strongly influenced by ionic coordination bonding with metal ions. The interpretation of the kinetic models showed the fitness of the Freundlich model for all metal ions.

Photocatalytic Efficiency of Titanium Dioxide for Dyes and Heavy Metals Removal from Wastewater Suresh Sagadevan; Is Fatimah; Titus Chinedu Egbosiuba; Solhe F. Alshahateet; J. Anita Lett; Getu Kassegn Weldegebrieal; Minh-Vien Le; Mohd Rafie Johan
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 2 Year 2022 (June 2022)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.2.13948.430-450

The hazardous toxicity of dye materials, even in low concentrations, harms ecological systems. It releases a large number of contaminants into the water, resulting as waste water. Dyes prevent the process of photosynthesis by obstructing light passage, lowers the oxygen levels dissolved in the water. Also, a good number of the dyes and heavy metals are carcinogenic and mutagenic to human beings. Heterogeneous photocatalysis is a promising technology for removing organic, inorganic, and microbial pollutants from water and wastewater. It is preferable to other conventional wastewater treatment approaches due to its benefit, such as low cost, environmental friendliness, ability to proceed at ambient temperature and pressure conditions, and to completely degrade pollutants into environmentally safe products with suitable measures. The titanium oxide (TiO2) is one of the most promising material that has gained enormous importance in the field of energy and environmental applications. The unique physicochemical properties of TiO2 make it one of the best candidates among existing photocatalysts. This review provides an overview of strategies employed to augment its catalytic performance as well as the impact of different operational parameters on the removal proficiency of various organic and inorganic pollutants in water and wastewater treatment. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Physicochemical and Photocatalytic Properties of Fe-Pillared Bentonite at Various Fe Content Is Fatimah; Yuyun Yunani Nurkholifah
Bulletin of Chemical Reaction Engineering & Catalysis 2016: BCREC Volume 11 Issue 3 Year 2016 (December 2016)
Publisher : Department of Chemical Engineering - Diponegoro University

Iron-pillared bentonites (Fe/Bents) were successfully prepared using a ferric chloride precursor. The prepared samples were characterized using XRD, BET and SEM-EDX. The results show that the pillared bentonite physicochemical character is affected by the iron content in a precursor solution. By Fe content variation it is found that Fe content in Fe/Bents is not linearly correlated with the specific surface area and the increased in d001 in which both the maximum specific surface are and d001 reach maximum at the Fe content of 20 mmol/g. Due to the kinetics of photocatalytic activity in phenol removal, it is concluded that in photo-Fenton-like processes.

Co-Authors - Rostyanesia Ahmad Said Ahmad Said Allwar Allwar Amri Yahya Arif Hidayat Arjek, Orien Claudia Handayani Arvina Adil Asep Abdurrahman Bambang Hernawan Nugroho Cicik Rahmawati Daud, Muhammad Fauzi Dian Riyanti Diyan Kurniaysih Dwi Gusti Apriliani Dwi Nur Halimah Dwi Nur Halimah Dwiarso Rubianto Dwiarso Rubiyanto Eko Sugiharto Endah Desiyani Faiha Ulfiyani Zaenuri Farah Liyana Bohari Fauziyyah, Anas Zahra Fethi Kooli Fitriani Harjati Galih Dwiki Ramanda Getu Kassegn Weldegebrieal Getu Kassegn Weldegebrieal Gusti Dwi Apriliani Habibi Hidayat Habibi Hidayat, Habibi Haneef, Mehru Nisha Muhamad Hasna' Azizah Azzahra' Hikmah Fatmawati Imam Sahroni Iqmal Tahir Iwan Sumarlan J. Anita Lett Jaka Nugraha Kamalia Kamalia Kamari, Azlan Karna Wijaya Karna Wijaya Karna Wijaya Karna Wijaya Karna Wijaya Karna Wijaya Karna Wijaya Khoirul Himmi Setyawan Khoirunisa khoirunisa Lita Dewi Pertiwi Lolita Narulita Doewandono Minh-Vien Le Mohd Rafie Johan Muchammad Tamyiz Nanda Candra Kartika Narsito Narsito Narsito Narsito Narsito Nindia Mega Kurniawati Noor Fitri Nur Afisa Lintang Mutiara Nur Aishah Mohd Noor Nur Nadia Dzulkifli Nurain Adam Nurcahyo Iman Prakoso Nurlaela, Nunung Oh, Won-Chun Orien Claudia Handayani Arjek Pertiwi, Lita Dewi Prihatiningsih Prihatiningsih Prihatiningsih Prihatiningsih, Prihatiningsih Putwi Widya Citradewi Rahmania Audita Rahmawati, Cicik Revita Anggreyani Rico Nurillahi Rico Nurillahi Rico Nurillahi Rifaldi Lutfi Fahmi Riyanto Riyanto Riyanto Riyanto Rohini Pujiarti Rudatiningsih Rudatiningsih Ruey-an Doong Sagadevan, Suresh Septian Perwira Yudha Sesy Ardyanti Shaobin Wang Sheikh Ahmad Izaddin Sheikh Mohd Ghazali Sheikh Ahmad Izaddin Sheikh Mohd Ghazali Solhe F. Alshahateet Sri Sudiono Suci Widianingsih Suresh Sagadevan Suresh Sagadevan Suresh Sagadevan Suresh Sagadevan Tesha Yuliarni Thorikul Huda Titus Chinedu Egbosiuba Torikul Huda Totok Eka Suharto Tuty Alawiyah Uun Ayil Hasanah Uun Ayyil Hasanah Wellyana Puspitasari Won-Chun Oh Yanti , Ika Yunani, Yuyun Yusak Maryunianta Yuyun Yunani Yuyun Yunani Nurkholifah Zahrah Nur Zakiyah Zakiyah, Zahrah Nur

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