cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kab. ogan ilir,
Sumatera selatan
INDONESIA
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Published by Universitas Sriwijaya
ISSN : 25409395     EISSN : 25409409     DOI : -
Core Subject : Science, Social,
Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science
Indonesian Journal of Fundamental and Applied Chemistry (IJFAC) is an international research journal and invites contributions of original research articles as well as review articles in several areas of chemistry. The journal aims to publish refereed, high-quality research papers with significant novelty and short communications in all branches of chemistry. Papers which describe novel theory and its application to practice are welcome, as are those which illustrate the transfer of techniques from other disciplines. IJFAC calls for papers that cover the following fields: Biochemistry Inorganic chemistry Physical chemistry Organic chemistry Analytical chemistry Applied Chemistry All papers are peer reviewed by at least two referees. Papers presented at conferences are peer reviewed and selected with the same standards as individually submitted papers. They therefore have the same archival value. Article should be submitted by the Online Submission Module at www.ijfac.unsri.ac.id or email to ijfac@unsri.ac.id
Arjuna Subject : -
Articles 196 Documents
 7   8   9   10   11 
Electrocoagulation Method to Reduce Pollutants in the Wastewater of Jumputan Fabric Industry Rusdianasari Rusdianasari; Ibnu Hajar; Indri Ariyanti
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 3 (2020): October 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i3.71

Abstract

The existence of the textile industry in Indonesia is not only in the category of large and medium scale industries but also in small scale and some even in the home industry. These caused pollution mainly as a result of the dyeing of textiles. Dye not only occurs in industrial areas but also occurs in densely populated settlements. An attempt to treat the waste of the textile industry is needed to solve the environmental pollution. In this research, liquid waste was processed using the electrocoagulation method, and the expected concentration or hazard caused by waste was decreased and to fulfill the required environmental quality standard. Treatment of jumputan wastewater by electrocoagulation method using 4 aluminum electrodes 11x10.5 cm in size with MP-P configuration type (Monopolar-Paralel) for 120 minutes. The parameters measured in this study were chromium heavy metal content, TSS (Total Suspended Solid), TDS (Total Dissolved Solids), as well as changes in pH, color and turbidity values where the applied voltage variations were 10, 13, 15, 17, and 20 volts with variation of electrode distance used 1.5; 2.0; and 2.5 cm. The best condition for each parameter was obtained at a distance of 1.5 cm with a voltage of 20 volts. Effectiveness of electrocoagulation method to decrease turbidity value up to 99.84%; color 99.33%, chromium content of 62.5%; TSS 33.68%; TDS of 66.59% and raised the pH from 5.64 to 8.10, respectively.
Cadmium in Water Samples determined by Atomic Absorption Spectrometry after Solid Phase Extraction using DOWEX 50WX2 resin Yuniar Yuniar; Siti Nuraini
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 6, No 1 (2021): February 2021
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v6.i1.14

Abstract

Pre concentration of  Cd(II)  in water samples was carried out by using  column solid phase extraction  DOWEX 50WX2 prior to flame atomic absorption spectrometry analized. The optimum  extraction conditions such as pH (5),  sample flow rate (1 mL min−1), volume of eluent HNO3 1N (10 mL) and sample volume (50 mL) was determined. The limit of detections was found 0.2697  µg L−1. The accuracy was determined by analyzid spiked water samples used Cd CRM 0.1 mg L-1 traceable to SRM standard solution NIST. Percent recovery and relative standard deviation were found 93% and  6%, respectively. Conclusion this preparation method effective for determination of ion Cd (II) in water with flame-SSA..Keywords: SPE,Cd, Dowex 50WX2, Flame-SSA
Triacylglycerols produced by biomass of endophytic fungus Neopestalotiopsis surinamensis from the Scurrula atropurpurea Elfita Elfita; Muharni Muharni; Mardiyanto Mardiyanto; Fitrya Fitrya; Elisa Nurmawati; Hary Widjajanti
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 3 (2020): October 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i3.95

Abstract

In Indonesia, Scurrula atropurpurea is a medicinal plant known as benalu. Triacylglycerols can be produced by plants, animals, algae, and microorganisms such as endophytic fungi. Triacylglycerols can be used in cosmetics, food, and medicine because they have biological activities such as antitumor, antibacterial, and cytotoxic. Besides, the compound can be used as a biodiesel substitute for triacylglycerols sourced from oil palm. This study aims to isolate and characterize triacylglycerol from biomass of endophytic fungal N. surinamensis from the S. atropurpurea  leaves. The compound was isolated and purified by the column chromatography method. The structure of the compound was determined by spectroscopic data ( FTIR, 1H-NMR, and 13C-NMR). Analysis of the spectrum and compared with the literature, the isolated compound is a triacylglycerol.
Synthesis of SnO2-Fe3O4 Nanocomposites using Hydrothermal Method Widya Twiny Rizki; Poedji Loekitowati Hariani; Addy Rachmat; Muhammad Said; Nur Hanis Hayati Hairom
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 3 (2020): October 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i3.88

Abstract

Synthesis of nanocomposite SnO2-Fe3O4 using the hydrothermal method was conducted in this study. The purpose of this study was to determine the best mass ratio in the synthesis of SnO2-Fe3O4. Nanocomposite SnO2-Fe3O4 were made with mass ratio (1:1), (1:2) and (2:1) were characterized using XRD and FTIR. The result of SnO2 characterization using XRD analysis was showed a sharp intensity peak at 2  = 26.5. The result of  Fe3O4 characterization using XRD analysis was showed a sharp intensity peak at 2  = 35.86. The XRD characterization result of SnO2-Fe3O4 (1:2) 2  = 26.74 and 34.08. Based on the XRD characterization, it can be concluded the best mass ratio for SnO2-Fe3O4 was (1:2). Characterization nanocomposite SnO2-Fe3O4 using FTIR showed the absorption band at 590 cm-1 is a characteristic peak of Sn-O and the absorption band at 563 cm-1 corresponds to Fe-O.
Synthesis and Characterization of Amorphous TiO2 Anode Prepared by Anodizing Method for Na-ion Batteries Dwi Indrawati; Nirwan Syarif; Dedi Rohendi
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 6, No 1 (2021): February 2021
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v6.i1.20

Abstract

Sodium ion battery (SIB) has engage sustainable alternative on replacing lithium ion batteries. The lower potential and larger ionic value has demanded on seeking a potential anode materials. Amorphous TiO2 prepared by electrochemical anodisation technique has provide a suitablility as anode SIB materials, which approved by conducting XRD, FTIR, and SEM-EDX measurements. Electrochemical performance was tested with variations in the concentration of NaOCl4 electrolyte in propylene carbonate (PC) solvent. Diffractogram of TiO2 showed the only peaks of Ti was observed at 2θ = 40.34. The TiO2 IR spectrogram shows that the absorption band at 507 cm-1 is the peak of the vibration characteristics of the Ti-O bond and the peak of 975 cm-1 corresponds to Ti-O-Ti bond. SEM-EDX image analysis showed the morphology of TiO2 was smooth without pore with a ratio of Ti: O elemental composition of 1: 2. Voltammogram showed the anodes in 0.5 M NaOCl4 electrolyte in PC solvent has a good stability potential windows with the high current density 1.2 mA and the capacity of 0.037 F/g
Ammonia Liquid Waste Processing using Electrolysis Method Alex Trisno; Dedi Rohendi; Suheriyanto Suheriyanto
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 3 (2020): October 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i3.66

Abstract

AbstractThis study uses an ammonia wastewater treatment system using 6 lanes and uses a batch-continuous system with electrolysis. Ammonia liquid waste content before and after electrolysis was analyzed using the Nessler method and analyzed using the Spectrophotometry method at a wavelength of 460 nm. Ammonia liquid waste with ammonia content can be used between 18,000-22,000 ppm used as a test sample. The results of this study indicate that the decrease in ammonia concentration every time is directly proportional to the amount of strong current and the number of electrode cells applied. The difference in number, by using 1 pair of cells can reduce 49.19%, 3 pairs of cells by 67.89%, and 5 pairs of cells by 85.08%. In the variation of electric current, 1; 5; 10; and 15 amperes produce 34.03%, respectively; 55.99%; 67.68% and 83.28%. On variations in the influence of the flow rate of 250; 500; 750; 1,000; and 1,250 mL/min resulting from a decrease in the concentration of ammonia is relatively the same, ie concentrations between 82% to 84%. The rate of decrease in ammonia concentration at the liquid level reaches 85.08% by using a variation of 5 pairs of electrode cells with a strong current of 15 amperes. The flow rate used is 250 mL/minute, the electrolysis process is carried out for 8 hours. The modification of the wastewater treatment system by using this electrolysis method is feasible for ammonia liquid waste treatment.  Keywords: Electrolysis, modification, batch-continuous, Nessler, Spectrophotometry, ammonia liquid waste, electrode cells, current strength, flow rate, stainless steel.
Utilization of Bottom Ash Coal and Agarwood in Waste Water Treatment in Palembang Jumputan Fabric Eis Sri Hartati; Muhammad Hatta Dahlan; Tuti Indah Sari
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 6, No 1 (2021): February 2021
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v6.i1.01

Abstract

Liquid waste is easily recognized because of the presence of dyes. Waste containing dyes can cause visual pollution and increase the risk of environmental and health damage. The aim of this study was to determine the operating conditions of the best jumputan liquid waste treatment using bottom ash batubara and agarwood with variations in feed flow rate (1, 2, and 3 l/minutes), filtration time (30, 60, 90, and 120 minutes), and treatment. The results of jumputan liquid waste treatment are compared with the parameters of Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), and pH of clean water quality standards for jumputan industry businesses and/or activities regulated in the Governor’s of Sumatera Selatan Regulation Number 16 of 2005 concerning Wastewater Quality Standards. The initials analysis of jumputan liquid waste before processing showed that jumputan liquid waste did not meet these quality standards, except pH and turbidity levels. In this study, jumputan liquid waste was pre-treated using coal bottom ash and activated carbon, then filtered. Biodegradation of jumputan liquid waste by konvensional method. The best of BOD, COD, TSS, pH, and the percentage of color rejection in the study were obtained in the treatment of jumputan  liquid waste using bottom ash batubara and activated carbon at a 120 minutes filtration time and a 1 l/minutes feed flow rate namely BOD 5.98 mg/l, COD 15 mg/l, TSS 22.3 mg/l, pH 7.32, color 5 Pt-Co, and 0 NTU turbidity. The filtration with bottom ash coal  and agarwood can removed the coloring from dyes.
Comparison Study of PHBA-intercalated Mg/Al-LDH and PHBA-immobilized Mg/Al-LDH: Characterization and Application for [AuCl4]̄ Removal from Solution Lutfi Aditya Hasnowo; Sri Juari Santosa; Bambang Rusdiarso
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 3 (2020): October 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i3.78

Abstract

Synthesis of p-hydroxybenzoic acid (PHBA)-intercalated Mg/Al-LDH and PHBA-immobilized Mg/Al-LDH have been conducted. PHBA-intercalated Mg/Al-LDH hybrid was synthesized by co-assembly process of Mg/Al-LDH nanosheets and PHBA anions. PHBA-immobilized Mg/Al-LDH was prepared by indirect synthesis, where PHBA anions were attached on surface of the Mg/Al-LDH material. Characterization by X-ray Diffraction showed that the PHBA-intercalated Mg/Al-LDH hybrid has the lattice parameter of a=3.02 Å, lattice parameter of c=46.77 Å and basal spacing d003=15.14 Å, where PHBA has been intercalated in interlayer of the hybrid. The PHBA-immobilized Mg/Al-LDH has lattice parameter of a=3.06 Å, lattice parameter of c=23.70 Å and basal spacing d003=7.90 Å. The analytical result confirmed that PHBA has been attached on surface of the hybrid for PHBA-immobilized Mg/Al-LDH. The optimum 10 mL of [AuCl4]‾ 100 mg L-1 removal condition of both hybrids were reached at pH 3. The optimum interaction time of [AuCl4]‾ and PHBA-intercalated Mg/Al-LDH hybrid was 250 minutes, respectively, while that for [AuCl4]‾ and PHBA-immobilized Mg/Al-LDH was 150 minutes. Removal of [AuCl4]‾ by PHBA-intercalated Mg/Al-LDH hybrid followed pseudo second order kinetic, whereas by PHBA-immobilized Mg/Al-LDH followed pseudo first order kinetic. Characterization using stereo photomicroscope confirmed that [AuCl4]‾ could be reduced  to Au  metal by both hybrids.
Characterization of Electrode with Cu2O-ZnO/C and Pt-Ru/C Catalyst for Electrochemical Reduction CO2 to CH3OH Dea Radestia Rahmah; Dedi Rohendi; Nirwan Syarif; Addy Rachmat; Nyimas Febrika Sya'baniah; Dwi Hawa Yulianti
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 6, No 1 (2021): February 2021
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v6.i1.08

Abstract

Electrode characterization has been carried out with Cu2O-ZnO/C and Pt-Ru/C catalysts to convert carbon dioxide to methanol. Characterization are carried out with XRD analysis, Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The electrodes are made by distributing Cu2O-ZnO/C and/or Pt-Ru/C catalyst by spraying method. The results of XRD analysis showed that the characteristic peak of platinum was 2θ = 39.7⁰ - 40.74⁰ with an intensity of 970 cps and 1384 cps and the diffraction peak of Ru oxide was found at 47.02⁰ with an intensity of 923 cps. The peak of Cu2O characteristics appeared at 36.12⁰ with an intensity of 88 cps and the peak for ZnO characteristics at 68.2⁰ with an intensity of 13 cps. The test results with the cyclic voltammetry method showed that the electrode with a Cu2O-ZnO/C catalyst obtained the highest ECSA value which was 26.044 cm2/g, with an electrical conductivity value of 3.4 x 10-3 S/cm and a total real resistance of 5.9425 Ω .
A Decrease In The Number Of Palm Oil Acids Using The Ion Exchange Method Muhammad Rico Ghozali; Fitri Hadiah; Tuti Emilia Agustina
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 3 (2020): October 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i3.59

Abstract

Crude Palm Oil (CPO) is a vegetable oil that contains free fatty acids. Free fatty acids (FFA) with a percentage below 5 are one of the parameters that affect the selling price of this commodity. The CPO used in this study came from a fatpit station with an acid number of 18 to 24 mgKOH / gram of oil. This study aims to reduce the free fatty acids contained in CPO by the ion exchange method using the help of Amberlite IRA 900 resin and Lewatit Monoplus M500 and then the acid number is calculated. The solvent used in this study was n-hexane with a ratio of 1: 1, 2: 3, 3: 2 and 1: 2 to oil. The research was initiated by activating the two types of resin using NaOH 4% solution as much as 450 ml, then each resin was mixed with hexane oil mixed with an initial ratio of 1: 1, the results were then distilled to separate the oil and hexane and then calculate the acid number. The resin that has been used is then rinsed using methanol before reducing the acid number again, if the acid number is ≥ 5 mgKOH / gram the oil is regenerated from the resin used. The results of this study showed that the Lewatit resin with a ratio of 3: 2 was able to decrease the acid number consistently for 3 times, regeneration had no effect on the decrease in acid number.Keywords: deacidification, anion resin, n-heksan, NaOH, CPO Abstrak (Indonesian)Crude Palm Oil (CPO) adalah salah satu minyak nabati yang memiliki kandungan asam lemak bebas. Asam lemak bebas yang juga dikenal fat fatty acid (FFA) dengan persentase dibawah 5 merupakan salah satu parameter yang mempengarui harga jual komoditi ini. CPO yang digunakan pada penelitian ini berasal dari stasiun fatpit dengan angka asam 18 sampai dengan 24 mgKOH/gminyak. Penelitian ini bertujuan untuk menurunkan asam lemak bebas yang terkandung dalam CPO dengan metode ion exchange menggunakan bantuan resin Amberlite IRA 900 dan Lewatit Monoplus M500 lalu dihitung angka asamnya. Pelarut yang digunakan dalam penelitian ini adalah n-heksan dengan rasio 1:1, 2:3, 3:2 dan 1:2 terhadap minyak. Penelitian diawali dengan melakukan aktifasi terhadap kedua jenis resin menggunakan larutan NaOH 4% sebanyak 450 ml, kemudian masing masing resin dialiri minyak bercampur heksan dengan perbandingan awal 1:1, hasilnya kemudian didestilasi untuk memisahkan minyak dan heksan lalu hitung angka asamnya. Resin yang telah digunakan kemudian dibilas dengan menggunakan methanol sebelum melakukan penurunan angka asam lagi, jika angka asam sudah ≥ 5 mgKOH/mgminyak dilakukan regenerasi terhadap resin yang digunakan. Hasil penelitian ini menujukkan resin Lewatit dengan rasio 3:2 mampu menurunkan angka asam secara konsisten selama 3 kali penurunan, regenerasi tidak berpengaruh terhadap penurunan angka asam.Kata Kunci: deacidification, anion resin, n-heksan, NaOH, CPO 

Page 9 of 20 | Total Record : 196

 7   8   9   10   11 

Filter by Year

2016 2025


Reset
Filter By Issues
All Issue Vol 10, No 3 (2025): October 2025 Vol 10, No 2 (2025): June 2025 Vol 10, No 1 (2025): February 2025 Vol 9, No 3 (2024): October 2024 Vol 9, No 2 (2024): June 2024 Vol 9, No 1 (2024): February 2024 Vol 8, No 3 (2023): October 2023 Vol 8, No 2 (2023): June 2023 Vol 8, No 1 (2023): February 2023 Vol 7, No 3 (2022): October 2022 Vol 7, No 2 (2022): June 2022 Vol 7, No 1 (2022): February 2022 Vol 6, No 3 (2021): October 2021 Vol 6, No 2 (2021): June 2021 Vol 6, No 1 (2021): February 2021 Vol 5, No 3 (2020): October 2020 Vol 5, No 2 (2020): June 2020 Vol 5, No 1 (2020): February 2020 Vol 4, No 3 (2019): October 2019 Vol 4, No 2 (2019): June 2019 Vol 4, No 1 (2019): February 2019 Vol 3, No 3 (2018): October 2018 Vol 3, No 2 (2018): June 2018 Vol 3, No 1 (2018): February 2018 Vol 2, No 3 (2017): October 2017 Vol 2, No 2 (2017): June 2017 Vol 2, No 1 (2017): February 2017 Vol 1, No 3 (2016): October 2016 Vol 1, No 2 (2016): June 2016 Vol 1, No 1 (2016): February 2016 More Issue