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Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University Jl. Prof. Dr. Hadari Nawawi, Pontianak, Kalimantan Barat, Indonesia
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INDONESIA
Indonesian Journal of Pure and Applied Chemistry
Published by Universitas Tanjungpura
ISSN : 26208571     EISSN : 2620858X     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Chemistry
Indonesian Journal of Pure and Applied Chemistry (IJoPAC) was first established in 2018 as a scientific journal that accommodates researchers and education practitioners to publish scientific work and research results which are the results of experiments or literature studies in the field of chemistry. Publications are carried out periodically with three issues (January-April, May-August, September-December) in one volume per year. Published scientific work can be in the form of original articles, short communications and review results covering the fields of Physical chemistry, Organic chemistry, Analytical chemistry, Inorganic chemistry, Biochemistry / Biological Chemistry, Applied Chemistry. Focus and Scope of Indonesian Journal of Pure and Applied Chemistry covering the fields : Physical chemistry Organic chemistry Analytical chemistry Inorganic chemistry Biochemistry/Biological Chemistry Applied Chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol 7, No 1 (2024)" : 5 Documents clear
EXTRACTION OF TITANIUM COMPOUNDS FROM CHLORIDE ACID SOLUTION OF BAUXITE RESIDUE USING ACID-BASE PRECIPITATION METHOD Kristina Ernilia; Imelda Hotmarisi Silalahi; Titin Anita Zaharah
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.66531

Abstract

The bauxite residue from the Bayer process can be categorized into red cake and iron sand. In this paper the iron sand has been characterized and used as a research object in order to obtain material with a higher concentration of the titanium element. Iron sand has a dominant chemical content of 60% iron and 10% titanium. Titanium can be extracted by several methods, one of which is the precipitation method. The precipitation process involves dissolving minerals in an acidic solution and extracting them with a base. The type of base and the pH are factors that affect the precipitation process. The aim of this study is to determine the effect of variations in pH and type of base on the extraction of TiO2 from a solution of iron sand in hydrochloric acid and to determine the elemental composition of the precipitation product. The first treatment of the iron sands was magnetic separation, which yielded 31.76% of relatively weakly magnetic sand. The magnetic sand was leached by using HCl (25%) to result in a solid with a percentage recovery of 40.8%, followed by an alkali fusion reaction with NaOH to give 56.85% of material. This material was then dissolved in the concentrated HCl and precipitated with NH4OH and NaOH at various pH values. The elemental analysis by using XRF of the precipitation products shows that the precipitation in NH4OH and pH 8 gives the material with the highest content of the element Ti, which is 49.5%, increases from only 10% in the iron sand. The selectivity of titanium for the iron element seems to be higher for the precipitation in NaOH, pH 8 than in NH4OH, pH 8, with Ti/Fe ratios of 1.50 and 1.44, respectively
PENGARUH PENAMBAHAN ION Ca2+ PADA PENGOLAHAN AIR GAMBUT MENGGUNAKAN KOAGULAN KITOSAN (THE EFFECT OF ADDITIONAL Ca2+ IONS ON PEAT WATER TREATMENT USING CHITOSAN COAGULANT) Tassya Amalia Putri; Anis Shofiyani Anis; Titin Anita Zaharah Titin
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.66688

Abstract

Peat water generally has a brownish-red color and organic matter that can pollute the environment so it is not suitable for use. This study aims to determine the effectiveness of chitosan with the addition of salts containing Ca2+ ions, namely CaCO3 and CaCl2, on reducing peat water parameters. The work procedure includes the preparation of chitosan gel and the preparation of CaCO3 and CaCl2 solutions made with concentration variations of 100, 200, 300, 400, and 500 ppm. Determination of organic substance concentration was carried out by permanganometric titration method The effectiveness of increasing pH in the presence of CaCO3 and CaCl2 salts in peat water was 7. The highest turbidity reduction efficiency after coagulation in peat water was 41.98% with the addition of CaCO3 and 37.37%, with the addition of CaCl2 occurred at a concentration of 300 ppm. The highest efficiency of color reduction after coagulation of peat water was with the addition of 60.7% CaCO3, while with the addition of CaCl2 58% occurred with the addition of 200 ppm CaCl2. The efficiency of reducing organic matter in peat water after coagulation with the addition of CaCO3 was 48.35% at a concentration of 300 ppm while with the addition of CaCl2 it was 48.35%. The addition of Ca2+ ions from CaCO3 and CaCl2 salts is considered to increase the effectiveness of chitosan as a coagulant for treating peat water.
PENGARUH PENAMBAHAN KOAGULAN BIJI KELOR TERHADAP PENURUNAN KADAR LOGAM KROMIUM (Cr), MANGAN (Mn), DAN TIMBAL (Pb) MENGGUNAKAN ICP-OES (THE ADDITION EFFECT OF KELOR SEEDS COAGULANT ON THE DECREASING OF CHROMIUM (Cr), MANGANESE (Mn), AND LEAD (Pb) LEVELS USING ICP-OES) Dian Susvira; Muhammad Bagus Ramadhan; Ninik Triayu Susparini; Boima Situmeang; Holisha Widiyanto; Nurhayati Bialangi; Weny JA Musa
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.63599

Abstract

Electroplating process has a negative effect in form metal ions waste. Today, industrial wastewater treatment widely using aluminum sulfate or alum as synthetic coagulants, although hazardous and expensive. This study was conducted to discover the activity of Moringa seeds (Moringa oleifera) as natural coagulants to substitute synthetic coagulants. Trapped metal ions detected by ICP-OES. The results showed that moringa seed coagulants could reduce 53% Cr, 64.56% Mn, and 92.89% Pb in the addition of 15 grams of moringa seed coagulants.
ANTI-INFLAMMATORY GERANYL ESTER OF IBUPROFEN AND CORRESPONDING FURFURYL AND ISOAMYL AMIDES WITH IN SILICO ANALYSIS Sukumar Bepary; Bishyajit Kumar Biswas; Sayeda Jahan; Sanjida Rahman; Md. Toufiqul Islam
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.64408

Abstract

Ibuprofen is a commercially available and widely used non-steroidal antiinflammatory drug being used in managing inflammatory disorders worldwide. This acid molecule has been subjected to esterification by coupling with geraniol as well as to amide formation by coupling with furfurylamine and isoamylamine for observing the changes in anti-inflammatory potential due to the addition of relatively long aliphatic chains. During these reactions, the reaction yields were within 88-94%. In this in vitro evaluation, the prevention of egg albumin denaturation and human red blood cell (HRBC) membrane stabilization were observed. For observing potential for preventing egg albumin denaturation, the synthesized compounds were applied as doses of 10 μg/ml, 20 μg/ml, 30 μg/ml, and 40 μg/ml. For observing the better response from ester derivative, 50 μg/ml, 100 μg/ml and 200 μg/ml doses were also tried. For observing the Human RBC membrane stabilization with amides, 50 μg/ml and 100 μg/ml doses were tried. Ibuprofen was taken as the reference compound and was applied in same doses in all of the experiments. The antiinflammatory potential of the synthesized geranyl ester was remarkable in comparatively higher doses (16%, 45%, and 54% reduction in protein denaturation from 50 μg/ml, 100 μg/ml, and 200 μg/ml doses respectively). Isoamylamide was relatively more potent than geranyl ester in preventing egg albumin denaturation (reductions were 9%, 13%, 17%, and 31% from 10, 20, 30, and 40 µg/ml doses respectively). Furfurylamide was more potent than isoamylamide by showing 9%, 17%, 31%, and 46% inhibitions respectively. There were dose-dependent antiinflammatory actions observed from both the geranyl ester and amides. The synthesized compounds were also subjected to the in silico study for observing the ligand-receptor interactions in the binding site of the cyclooxygenase enzyme.
PENGARUH PENGGUNAAN ASAM ORGANIK UNTUK MENURUNKAN KADAR LOGAM TIMBAL (Pb) PADA DAGING SIPUT GONGGONG (THE EFFECT OF THE USE OF ORGANIC ACIDS TO REDUCE THE LEVELS OF METAL LEAD (Pb) ON THE MEAT OF GONGGONG SNAILS) Fitrah Amelia; Ramses Ramses; Ismarti Ismarti
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.64459

Abstract

Pollution that often occurs at sea is heavy metal pollution. Heavy metals that often pollute are Lead metals (Pb). Heavy metal pollution that occurs often has an impact on plants and animals that live in the sea. Animals that are often contaminated with heavy metals are snails because of the nature of snails that can accumulate metals due to their persistent nature, filter feeders, slow movements to avoid metal pollution. The purpose of this study is to reduce metal pollution in seafood, one of the ways that can be done by soaking seafood using organic acids such as tamarind and lime, because organic acids contain citric compounds that can bind to metals. This type of research is an experimental research design with Randomized Pretest-posttest control group design. The experimental design used was a Completely Randomized Design (CRD). Metal content analysis was carried out using the Perkin Elmer Type PinAAcle 900T brand AAS. The results were obtained that tamarind can decrease Pb metal levels in the bark snail meat at optimum conditions at a concentration of 10%, immersion time of 60 minutes and a percentage reduction of 47.1%. While the optimum condition of lime occurs at 10% concentration and soaking time is 30 minutes with a 25% percent decrease. So it can be said that tamarind is better in reducing metal content compared to Lime

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