Garuda - Garba Rujukan Digital

All

Indonesian Journal of Chemistry and Environment

ijoce
Website

Published by Universitas Negeri Yogyakarta

ISSN : - EISSN : 25993186 DOI : 10.21831

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Materials Science & Nanotechnology

Articles are welcome that deal with theoretical analysis, meta-anaysis reviews, and result of research or empirical studies from all aspect of Chemistry and Environment. Reports on new methodologies and comprehensive assessments of existing ones, as well as applications to new types of problems are especially welcome. Experimental papers are expected to be brought into relation with theory, and theoretical papers should be connected to present or future experiments. Manuscripts that apply routine use or minor extensions or modifications of established and/or published experimental and theoretical methodologies are appropriate if they report novel results for an important problem of high interest and/or if they provide significant new insights.

Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)

Articles 71 Documents

1 2 3 4 5

Analysis of Cyanide Content on Yams Using Spectrophotometry Methods Vany Widiastuti; Erlin Ernawati; Vita Fatmadewi; Saraswati Anindyajati; Shaaliyah Novita Faradina
Indonesian Journal of Chemistry and Environment Vol 1, No 1 (2017): December 2017
Publisher : Universitas Negeri Yogyakarta

This study aims to determine whether or not cyanide content in various species of yams in the District of Tempel, Sleman, Yogyakarta. The samples were cassava (Manihot esculenta Crantz), water yam (Discorea Alata), intoxicating yam (Dioscorea hispida Dennst), canna lilly (Canna discolor L), and taro (Colocasia esculenta). The qualitative test was performed by cementing the sample with aquadest and 10% tartrate acid and then covering the erlenmeyer that containing the sample with dry filter paper immersed in saturated picric acid and dampened with 8% sodium carbonate and then heating it. Quantitative tests were performed using a spectrum 20 with a wavelength of 590 nm. This quantitative test is based on forming a blue hydrindantin complex at pH 12 when cyanide is reacted with a ninhydrin complex. The results showed that in qualitative test, sample containing cyanide was indicated by the change of color of filter paper from yellow to brownish red. Quantitative results show that cyanide contained in sample as varies levels. The cyanide levels through the various species of yams were 0.1098 mg / 100g for cassava 0.049 mg/100 g for water yam, 0.1394 mg/100g for intoxing yam, 0.0896 mg/100 g for canna lilly and 0.0680 mg / 100g for taro.

Using Different Size of Montmorillonite Particles for Filtration-Adsorption of Nickel Metal in Electroplating Liquid Waste Dyah Mustika Braniwati; Erfan Priyambodo
Indonesian Journal of Chemistry and Environment Vol 4, No 1 (2021): JUNE 2021
Publisher : Universitas Negeri Yogyakarta

This study aims to know the effect of montmorillonite particle, which were granule and gravel of montmorillonite,prepared from the sintering method and its effectiveness in filtration-adsorption process of the nickel-metal in electroplating liquid waste. The granule and gravel of montmorillonite wereprepared by compaction and sintering processes at a temperature of 900oC. The characterization of granule montmorillonite shows the notoriously random micropore material, which the pore surface area was 8.393 m2/g. While the gravel montmorillonite has a pore surface area of 4,381 m2/g. The test was carried out by flowing electroplating waste with the crossflow filtration method and batch adsorption. The most effective decrease in the concentration of nickel-metal occurred in the granules of montmorillonite with a mass ratio of material through filtration and adsorptionwas 2:3. The effectiveness of filtration-adsorption process for removing nickel metal from liquid waste of electropaling was 83.51%.

Investigation of Structure and Magnetic Properties of Polycrystalline La0.7Ba0.21Ca0.09Mn1-xNixO3 (x=0.1, 0.2, 0.3) by Sol Gel Method P. Prasetyo
Indonesian Journal of Chemistry and Environment Vol 3, No 1 (2020): JUNE 2020
Publisher : Universitas Negeri Yogyakarta

Polycrystalline La0,7Ba0,21Ca0,09Mn1-xNixO3 (x = 0,1; 0,2; 0,3) have been synthesized using sol-gel method, the precursors material from pro analysis products. Samples had characterized by XRD, SEM, and VSM. The result of refinement from XRD pattern shown that all materials had single phase with the lattice parameter a and b had decreased with increasing Ni+3 ion and had a rhombohedral structure along with R-3c space group. The materials had nanoparticle distribution particle size based on measurement by SEM. Hysteresis loop shown that the samples La0,7Ba0,21Ca0,09Mn1-xNixO3 (x = 0,1; 0,2; 0,3) are soft magnetic material. Moreover, the increase of Ni+3 ion gave an impact about the magnetization decreasing from the materials which shown by the decreasing of magnetic saturation value.

Determination of Magnesium and Iron in Goat’s Milk Powder by Flame Atomic Absorption Spectrophotometry H. Kusumaningtyas; H. Febiana; L. Septiani
Indonesian Journal of Chemistry and Environment Vol 2, No 1 (2019): June 2019
Publisher : Universitas Negeri Yogyakarta

This research aims to determine the levels of magnesium and iron in goat milk powder. The method of this research was atomic absorption spectrophotometry. The research subject was goat milk powder. Moreover, the research object was the amount of magnesium and iron in goat’s milk powder. Before analyzing, the first step was removing organic substances in the sample that could interfere the analysis by dissolved it in concentrated nitric acid and heated. Based on the measurement using flame atomic absorption spectrophotometry method, absorbance and concentration of magnesium and iron in the sample were obtained. The analysis showed that the levels of magnesium and iron in the sample were 0.0032 mg/g and 0.0218 mg/g.

Preparation of Magnetite-Tannin Guava Leaves as Pb(II) Adsorbent Mochamad Hafiz Ghozali Rusmana; Triastuti Sulistyaningsih
Indonesian Journal of Chemistry and Environment Vol 4, No 2 (2021): DECEMBER 2021
Publisher : Universitas Negeri Yogyakarta

The increasing use of heavy metals in everyday life causes serious environmental pollution, one of which is the Pb(II) metal ion which is toxic to organisms. This study aimed to modify the tannins extracted from guava leaves with magnetite (Fe3O4) by coprecipitation as adsorbent of Pb(II) metal ion. The modified results were characterized using Fourier Transform Infra Red (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), and X-Ray Diffraction (XRD). Metal ion levels of Pb(II) before and after adsorption were measured by Atomic Absorption Spectroscopy (AAS). The results showed that the tannins increased the magnetite-tannin crystal size from 85.17 to 155.66 nm. Modification of magnetite (Fe3O4) in guava leaf tannins is able to provide magnetic properties that facilitate post-adsorption separation. The optimum adsorption conditions were reached at pH 7 for magnetite-tannin and magnetite with optimum contact time. The adsorption of magnetite-tannin and magnetite occurred at 90 and 60 minutes. The maximum adsorption capacity of Pb(II) metal ions by magnetite-tannin is smaller than that of magnetite. Both adsorption processes followed the Langmuir isotherm pattern and Pseudo Order Two (Ho) kinetics.

Optimization of Energy and Time Variations for Synthesis of N doped TiO2 Nanotube using Microwave-Asssisted Hydrothermal Method Cindy Candrika Anugrahayu; Cahyorini Kusumawardani
Indonesian Journal of Chemistry and Environment Vol 3, No 2 (2020): DECEMBER 2020
Publisher : Universitas Negeri Yogyakarta

This study aimed to determine the effect of energy and time hydrothermal microwave time variations on the crystal structure and N-TiO2 nanotube photocatalytic activity. The synthesis of N-TiO2 nanotube was performed with the hydrothermal microwave method. The N-TiO2 preparationwas carried out by dissolving ethylenediamine precursor in 80 ml of 96% ethanol and 3 ml TTIP which was reacted at 70 °C for 4 hours. The obtained N-TiO2 was formed into nanotubes used the hydrotermal microwave method in low temperature (180W), medium temperature (360 W), and high temperature (720 W) with time variations of 30 minutes, 1 hour, and 2 hours. The microwave hydrothermal process in this study used 10 M NaOH to form a tubular structure and 0.5 M HCl as an ion exchange. The characterization analysis performed by X-Ray Diffraction, UV-Diffuse Reflectance Spectroscopy, and blue methylene degradation. The results of this study indicate that the variations of time and energy of the microwave hydrothermal method affect the crystal structure of the N-TiO2 nanotubes. The nanotubes structure has been formed at a variety of low energy 2 hours, medium energy 0.5 hours, 1 hour and 2 hours, and high energy 2 hours. Energy and time variations of hydrothermal microwave affect the photocatalytic activity of N-TiO2 nanotubes showed second-order kinetics. The best percentage of degradation produced in the T2 variation is the photocatalyst reaction of 71.89% and the adsorbs reaction of 64.81%.

Adsorption of Ammonium Ion from Tofu Industrial Liquid Waste by Coconut Shell-Activated Carbon C. N. Adha; U. Istiqomah; A. W. Safitri; T. Tarmini
Indonesian Journal of Chemistry and Environment Vol 2, No 2 (2019): December 2019
Publisher : Universitas Negeri Yogyakarta

Liquid waste from tofu industry will flow or discharge into water. It causes pollution which is characterized by unpleasant odor. If this continues, it can damage the environment and threaten the health of the people who inhale the unpleasant odor. Activated carbon is a carbon that is able to adsorb in the liquid phase or gas phase. Activated carbon is the best adsorbent in the adsorption system. The material for activated carbon comes from animals, plants, and waste or minerals that contain carbon. Coconut shell is an ingredient that can be made into activated carbon. Activated carbon from coconut shell has many benefits one of them can adsorb liquid waste from tofu industry. This study aims to examine the ability of coconut shell to adsorben, that have been activated by K2CO3 or HCl activator. In this study given the variation of activated charcoal mass and contact time variations to determine the effect on the ability of activated coconut shell charcoal adsorption on ammonia content in Liquid waste from tofu industry. The results of this study are the greater the mass of activated charcoal and the longer the contact time, the greater the ammonia absorbed by activated charcoal, which indicates that the percent decrease in ammonia concentration is greater

Determination of Iron (Fe) Species in Samples of Canned Packaging Beef Septi Dwi Haryanti; Hannuna Dzawinnuha; Vanadia Adika
Indonesian Journal of Chemistry and Environment Vol 1, No 1 (2017): December 2017
Publisher : Universitas Negeri Yogyakarta

The research aims to know the content of iron metal (Fe) in samples of canned packaging beef. The destruction of the samples prior to breaking the metallic bond with organic compounds in the sample, making them easier to identify the metal content to be analyzed. The analysis of metal content of iron has been done by using Atomic Absorption Specthrophotometer. The level of iron metal contained in beef samples of A brand packaging is 40.0570 mg/kg, in B brand packaging is 25.5175 mg / Kg and in the C brand packaging 22.9600 mg/Kg. When compared to the iron metal threshold in food as contained in SNI 01-7387-2009, then the sample of beef packaging for B and C brand is still safe because the iron content is still below 30 mg/kg. Meanwhile, the beef corned for A brand is not safe because it is higher than 30 mg/kg.

The Effect of Acid Activated Natural Zeolite Catalyst on Further Catalytic Cracking of Liquid Product’s Heavy Fraction from Plastic Waste Treatment Factory D. Darwanta; Zakarias Faidiban; Frans A. Asmuruf
Indonesian Journal of Chemistry and Environment Vol 4, No 1 (2021): JUNE 2021
Publisher : Universitas Negeri Yogyakarta

The influence of activated natural zeolite catalyst on the further cracking of liquid product’s heavy fraction from plastic waste treatment factory been studied resulting in alternative fuel oil. Natural zeolite from Wonosari, Yogyakarta was activated with 1 M H2SO4 solution. Natural zeolite and activated zeolite were characterized using XRD at an angle of 2ϴ=5-60 degrees. Further cracking process was carried out to study the ratio of catalyst mass of 25 g; 50 g; 75 g; 100 g to 750 mL weight fraction of the factory liquid product. The further cracking product was flame tested, specific gravity measured by gravimetric method and characterized using GC-MS. The calculation of the constituent fuel fractions is also carried out. The performance test of the further cracking product as an alternative fuel was carried out for the generator engine ignition process. The result showed that the activation process using acid was not destroy the zeolite structure. The study of ratio catalyst to liquid waste volume obtained an optimum result at 50 g/750 mL based on the volume of resulted fuel oil with small amount of catalyst. The resulted fuel oil has a density of 0.7908 g/mL with a clear yellow color, and flammable. The GC-MS analysis resulted in fuel oil consisting of 4.11% gasoline, 8.42 kerosene, 75.56% solar, and 11.93% heavy fraction

Synthesis and Characterization of Montmorillonite Membrane for Nickel and Zink Metals Filtration in Electroplating Liquid Waste I. Hidayah
Indonesian Journal of Chemistry and Environment Vol 3, No 1 (2020): JUNE 2020
Publisher : Universitas Negeri Yogyakarta

The application of ceramic membrane technology has been applied in water treatment. The montmorillonite used was analyzed by XRD and showed typical montmorillonite peaks at 2θ 7.49o, 28.07o, 35.75 o, 40.73o, 49.14o dan 67.03o. Montmorillonite membrane was made by the process of dry pressing.PVA in montmorillonite is expected to function as a binder agent. The result variation on PVA composition 0%, 1%. 2%, 3% and 4%, show the flux value that increased with the adition of PVA composition. The montmorillonite membrane with a 4% PVA composition a result greatest flux and porosity values compared to other compositions. The resulting flux value is 1596.5679 L/m2.h and porosity 20.9477%. SEM-EDXtest result showed montmorillonite membrane is a porous membrane that is spread and evenly distributed but the resulting pore is not uniform. Montmorillonite membrane rejection of nickel metal was 55.5352% dan zink metal was 37.8614% with a 40-minute filtration process.

Page 3 of 8 | Total Record : 71

1 2 3 4 5

Filter by Year

2018 2025

Filter By Issues

All Issue Vol. 8 No. 1 (2025): JUNE 2025 Vol 7, No 2 (2024): DECEMBER 2024 Vol 7, No 1 (2024): JUNE 2024 Vol 6, No 2 (2023): DECEMBER 2023 Vol 6, No 1 (2023): JUNE 2023 Vol 5, No 2 (2022): DECEMBER 2022 Vol 5, No 1 (2022): JUNE 2022 Vol 4, No 2 (2021): DECEMBER 2021 Vol 4, No 1 (2021): JUNE 2021 Vol 3, No 2 (2020): DECEMBER 2020 Vol 3, No 1 (2020): JUNE 2020 Vol 2, No 2 (2019): December 2019 Vol 2, No 1 (2019): June 2019 Vol 1, No 1 (2017): December 2017 More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Cahyorini Kusumawardani

Contact Email
cahyorini.k@uny.ac.id

Phone
+62818467905

Journal Mail Official
uny.ijce@gmail.com

Editorial Address
Jl Kolombo No 1 Karangmalang, Depok

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Cahyorini Kusumawardani

Contact Email cahyorini.k@uny.ac.id

Phone +62818467905

Journal Mail Official uny.ijce@gmail.com

Editorial Address Jl Kolombo No 1 Karangmalang, Depok

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Cahyorini Kusumawardani

Contact Email
cahyorini.k@uny.ac.id

Phone
+62818467905

Journal Mail Official
uny.ijce@gmail.com

Editorial Address
Jl Kolombo No 1 Karangmalang, Depok

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA