cover
Article Per Year (5 Year)
All
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
Indonesian Journal of Chemistry and Environment
Published by Universitas Negeri Yogyakarta
ISSN : -     EISSN : 25993186     DOI : 10.21831
Core Subject : Science, Engineering,
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 5 Documents
 1 
Search results for , issue "Vol 3, No 1 (2020): JUNE 2020" : 5 Documents clear
Synthesis of Chitosan Sulfate From Crab (Scylla serrata) and its application as adsorbent Salmahaminati Salmahaminati
Indonesian Journal of Chemistry and Environment Vol 3, No 1 (2020): JUNE 2020
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (413.404 KB) | DOI: 10.21831/ijce.v3i1.40819

Abstract

Synthesis of chitosan sulfate from crab (Scylla Serrata) shell and its application as Remazol Yellow FG dye adsorbent has been studied. This experiment was conducted to study the effectiveness of chitin from crab shell to be converted into chitosan sulfate and to study the adsorption of chitosan sulfate by Remazol Yellow FG dye.  Isolation of chitin from crab shell was done by deproteination and demineralization process. Chitin had been converted into chitosan using demineralization process. Chitosan sulfate was made by reacting chitosan with 1 M ammonium sulfate solution. Characterizations of the chitosan are involving determination of degree of deacetylation. Functional group of chitin, chitosan and chitosan sulfate were determined by FTIR spectroscopy. The dye adsorption of chitosan sulfate was analyzed with UV-Vis spectroscopy. The result showed that rendement of chitin, chitosan and chitosan sulphate were 28.57%, 52.5% and 92%. The degree of deacetilation of chitin and chitosan were 80 – 90% and 70 – 80%. Remazol Yellow FG was adsopr 76.5%.
The Effect of Co2+ in the Form of CoCl2 Compounds on α-Amylase Activity Perwita Riski Kusumawati; Das Salirawati
Indonesian Journal of Chemistry and Environment Vol 3, No 1 (2020): JUNE 2020
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.86 KB) | DOI: 10.21831/ijce.v3i1.40814

Abstract

This study aims to determine: (1) the optimum conditions for α-amylase enzyme activity with potato starch as a substrate including incubation time, pH, temperature, substrate concentration, and enzyme concentration, (2) the effect of Co2+ metal ions in the form of CoCl2 compounds on α-amylase enzyme activity with potato starch substrate at optimum conditions. The determination of α-amylase enzyme activity with potato starch substrate was carried out using the dinitrosalicylic acid (DNS) method. The determination of α-amylase enzyme activity with and without the addition of CoCl2 was carried out at the optimum conditions that have been obtained. The variation in the added concentration of CoCl2 were 0.01; 0.02; 0.03; 0.04; and 0.05 M. The data obtained in this study were enzyme activity in units of mg/mL/minute at 37° C. The data analysis used was descriptive qualitative by comparing the activity of the α-amylase enzyme with and without the addition of CoCl2 at optimum conditions. The results of the average α-amylase enzyme activity at optimum conditions (temperature 37° C, pH 7.2, incubation time 15 minutes, substrate concentration 20 mg/mL, and enzyme concentration 40 mg/mL), namely 0.00794 mg/mL at temperature 37° C. For the mean α-amylase enzyme activity with the addition of CoCl2 at a concentration of 0.01; 0.02; 0.03; 0.04; and 0.05 M, respectively 0.0038; 0.0013; 0.0012; 0.0011; and 0.00031 mg/mL per minute at 37° C. Based on these data it can be concluded that the tendency of the Co2+ metal ion is inhibitory and greatly affects the activity of the α-amylase enzyme.
Separation of Manganese Metal Ions with Natural Zeolite Adsorbents and Activated Charcoal of Shall Water use Column Adsorption Method Batrisya Batrisya; Suyanta Suyanta
Indonesian Journal of Chemistry and Environment Vol 3, No 1 (2020): JUNE 2020
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (444.465 KB) | DOI: 10.21831/ijce.v3i1.40815

Abstract

The purpose of this study is to determine the effectiveness of natural zeolite and activated charcoal to reduce levels of manganese in shall water, determine the effect of contact time with the effectiveness of separation of manganese metal in a shallow well water and know the condition before-after the adsorption process. Method that used was column adsorption with a flow system in which sample is applied to the filtration tube containing zeolite and active carbon. The tests carried out included testing of drinking water parameters namely pH and TDS, testing of manganese content in a shallow well water using Atomic Absorption Spectrophotometer (AAS). The results showed the effectiveness value of natural zeolite adsorbent and activated charcoal using an adsorption column to reduce manganese content in a shallow well water of 90.404%. The longer the use of natural zeolite and activated charcoal, the effectiveness of reducing the manganese content in a shallow well water tends to decrease. A shallow well water samples before the adsorption process have safe conditions for pH and TDS parameters, for manganese metal parameters are also still below the appropriate threshold (SNI) number 01-0220-1987 and RI Permenkes No.492 / MENKES / PER / IV / 2010, after the process of adsorption of f a shallow well water is safe for consumption.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.981 KB) | DOI: 10.21831/ijce.v3i1.40817

Abstract

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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (600.37 KB) | DOI: 10.21831/ijce.v3i1.40818

Abstract

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 1 of 1 | Total Record : 5

 1 

Filter by Year

2021 2021


Reset
Filter By Issues
All Issue Vol. 8 No. 2 (2025): DECEMBER 2025 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