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Salmahaminati
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Department of ChemistryFaculty of Mathematics and Natural ScienceUniversitas Islam IndonesiaProf. Dr. H. Zanzawi Soejoeti Building, Kampus Terpadu UII Jl. Kaliurang Km.14,5 Sleman, Yogyakarta, 55584
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INDONESIA
IJCR (Indonesian Journal of Chemical Research)
Published by Universitas Islam Indonesia
ISSN : 23549610     EISSN : 26145081     DOI : 10.20885
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology
IJCR is intended to be the journal for publishing articles reporting the results of research on Chemistry field with related topics, as well as with their development through interdisciplinary and multidisciplinary approach. The types of articles published in this journal include research articles, review articles and short communication. This journal covers some topics include: Inorganic Chemistry Physical Chemistry Computational Chemistry Biochemistry Analytical Chemistry Organic Chemistry Food and Medicinal Chemistry Environmental Chemistry Material Chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 118 Documents
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The Effect of Grinzest Bioadditives on BBM Fuel Consumption in Mining Vehicles at PT Arutmin Indonesia Kintap Fitri, Noor; Sulistia, Dona; Abraham, Ali; Aditya Dharma, Irfan; Habibullah, Marhaban; Maulana, Ibnu; Effendi, Fuad; Khofifah; Mauludiyah, Riskiyatul; Sukri, Qomarudin; Syahputra, Rahmat; Ila Nurhuddah, Ika
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 2 (2024): Volume 9, ISSUE 2,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss2.art13

Abstract

Mining industry activities have a very high dependence on fuel consumption. This dependence on the use of fuel is because diesel fuel is the main energy source to drive vehicle activities in the mining industry. Fuel consumption of PT. Arutmin Indonesia Tambang Kintap is around 40% of production costs. Given this substantial fuel demand, improving fuel efficiency is crucial, making fuel-saving measures essential. One approach to reducing fuel consumption involves adding bio-additives to enhance the fuel combustion process. The purpose of this study was to determine the effect of adding Grinzest bio additives to the fuel used by heavy machinery at PT. Arutmin Indonesia Tambang Kintap. The research steps include: (1) characterization of the fuel and bio additives; (2) blending fuel with Grinzest bio additives; (3) characterization of BBM-Grinzest blending; (4) testing the performance of Grinzest bioadditives on heavy machinery. The results of the study showed that Grinzest bio additives were able to reduce fuel consumption, reduce gas emission levels, and prevent rust (deposits) on the engine. The results of tests conducted by the team in the field showed that the addition of bioadditives to fuel with a ratio of 1:1000 showed a decrease in fuel consumption of around 7.4%.
Karakterisasi Selulosa Bakteri Hasil Fermentasi Limbah Air Kelapa dan Pemanfaatannya Sebagai Penyangga Pembentukan Perak Nanopartikel Mutiara, Tintin; Wardatur Rohmah, Isnaeni; Okta Berinda, Aulia
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 2 (2024): Volume 9, ISSUE 2,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss2.art14

Abstract

Bacterial cellulose (BC) is a biopolymer resulting from sugar fermentation by exopolysaccharide-producing bacteria. BC production can be done using various agricultural and industrial wastes as raw materials. This makes BC one of the leading choices for green technology. BC produced from coconut water fermentation is known as nata de coco. Nata de coco has several superior properties, including high purity, crystallinity, chemical stability, heat resistance, good water retention capacity, mechanical properties, and biocompatibility. The unique properties of BC allow its application as a support and stabilizer for silver nanoparticles in composite form. The synthesis of silver nanoparticle composites in bacterial cellulose can be done using an environmentally friendly method. In this study, BC was produced from the fermentation of coconut water waste by Acetobacter xylinum bacteria. The characteristics of the resulting BC were studied, including thickness, Water Retention Capacity (WRC), cellulose content, yield, and swelling properties. In addition, the resulting BC is utilized as a support and stabilizer for forming silver nanoparticles. The presence of silver nanoparticles in the BC structure was analyzed using a Scanning Electron Microscope (SEM) and Energy-Dispersive X-ray (EDX). The analysis results showed that the silver content was 22.20% in the BC structure with a fermentation time of 3 days, and 15.52% in BC with a fermentation time of 5 days.
Elimination Of Manganese Interference With EDTA Masking In Determination of Nickel and Lead In Pyrolusite Using Atomic Absorption Spectrophotometry Landi Pote, Lodowik; Anggelinus Nadut
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 8 No. 2 (2023): Volume 8, ISSUE 2,2023
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol8.iss2.art4

Abstract

ABSTRACT Research has been carried out on the elimination of manganese interference with EDTA masking in the determination of nickel and lead in pyrolusite using Atomic Absorption Spectrophotometry (AAS) with an air-acetylene flame. Dissolution of pyrolusite samples was carried out by wet digestion using aqueous regia and HF solutions with a ratio of 3:4 (v/v). Interference studies were carried out on the absorbance of nickel and lead with the addition of manganese with varying concentrations of 100-5000 μg/mL measured at a wavelength of 232.0 nm and a gap width of 0.2 nm for nickel and a wavelength of 283.3 nm and a gap width of 0.7 nm for lead. The analysis results show that manganese at a concentration of 100-5000 μg/mL can interfere with the absorbance of nickel and lead, where the absorbance of nickel and lead increases. Recovery results (Recovery) of nickel, lead and manganese with masking 0.10 M EDTA and extracting nickel, lead and manganese into chloroform with sodium diethyl dithiocarbamate complexing at pH 2 obtained nickel (85.39%), lead (92.63%) and manganese (0.00%). nickel and lead pyrolusite samples before extraction with an average nickel and lead content of 1817.82 ± 9.42 μg/g and 122.81 ± 7.60 μg/g. The nickel and lead content after manganese interference was removed by EDTA 0 masking .1 M at pH 2 and complexed with DDC in chloroform obtained an average content of 1571.32 ± 7.54 μg/g for nickel and 87.65 ± 7.53 μg for lead. Key words: Atomic Absorption Spectrophotometry, Interference, masking EDTA, Extraction, Nickel and Lead.
Harvesting Sustainability: Transforming Rice Straw Wastes into Eco-Friendly Silica Gel Said, Ahmad; Aprisilia Risky Wijaya; Gazali Majid; Dede Ulfah; Ramadhani; Musawwa, Muhammad Miqdam
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 1 (2024): Volume 9, ISSUE 1,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss1.art1

Abstract

The vast quantities of rice straw residue generated every year present both a challenge and an opportunity. To address the challenge, this work took the opportunity by transforming rice straw waste into eco-friendly silica gel. Synthesis of rice straw-based silica gel was via sol-gel method with the calcination temperature of 700 oC for 2 h and the addition of sodium hydroxide 2 molar. Characteristics of silica gel and its raw material have been investigated using several techniques such as FTIR, XRD, SEM, and BET surface area. The synthesized silica gel showed obvious peaks of Si-O-Si and O-H, aggregated smaller particles, crystal nature, and high surface area. This innovative work contributes to agricultural waste management and the circular economy for a sustainable future.
Alternatif Bahan Bakar Maritim Ramah Lingkungan: Tinjauan Meilinda, Reza; Ningsih, Putri Amelia; Anggraini, Dian; Pardi, Hilfi
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 1 (2024): Volume 9, ISSUE 1,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss1.art2

Abstract

Indonesia is an archipelagic country with an ocean area wider than land. Indonesia's ocean areas contain many maritime activities, one of which is shipping and trade. This activity causes a lot of domestic and foreign transportation to pass through Indonesia's maritime areas. It is not uncommon for domestic and international sea transportation to discharge exhaust emissions from their fuel onto the sea surface, causing marine damage. This article was created with the aim of summarizing previous research to make it easier for readers and to find out the appropriate types of maritime chemical fuels, combustion and exhaust emissions, as well as reducing pollution from combustion. The review of studies uses a comparative approach, collecting sources from Google Scholar and PubMed databases, as well as national and international publications. The research results show that liquefied natural gas (LNG) and hydrogen are good candidates to replace chemical fuels because they are both sulfur-free.
THE POTENTIAL OF PALM SHELL ACTIVATED CARBON AS AN ADSORBENT FOR HEAVY METALS IN THE RECYCLING PROCESS OF USED LUBRICATING OIL Zilfa, Zilfa; Safni; Amanda, Selya
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 1 (2024): Volume 9, ISSUE 1,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss1.art3

Abstract

With the increasing industrial and transportation activities, the demand for lubricating oil is increasing every year. Lubricating oil is used to reduce friction and wear on frictional engine components. Over time, lubricating oil becomes inefficient and needs to be replaced with new oil. To enhance the efficiency of petroleum use and reduce environmental pollution, used lubricants need to be recycled. One method of improving the quality of used lubricants is by absorbing heavy metal contaminants using activated carbon from palm kernel shells. The efficiency of activated carbon adsorption as an adsorbent for heavy metals in used lubricants was observed by varying the adsorption parameters of contact time, adsorbent mass, and sample volume. In this study, the absorption of several heavy metals, including iron (Fe), lead (Pb), and zinc (Zn), was investigated. Analysis of the absorption results was performed using AAS, FTIR, XRD, and XRF. The results showed that the absorption of metals in used lubricants using activated carbon from palm kernel shells with optimum parameters can absorb 90% of Fe, Pb, and Zn metals. The optimum contact time for each metal adsorption was 3 hours, with an adsorbent mass of 0.75 grams and a sample volume of 5 mL. Analysis of used lubricants before and after adsorption using FTIR indicated a shift in wave numbers, indicating an adsorption process.
- Analysis of COD (Chemical Oxygen Demand) and TSS (Total Suspended Solid) Levels in River Water at UPTD Environmental Laboratory Muhammad Athar Naufal; Salmahaminati, Salmahaminati
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 1 (2024): Volume 9, ISSUE 1,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss1.art4

Abstract

Telah dilakukan penelitian yaitu analisis kadar COD (Chemical Oxygen Demand) dan TSS (Total Suspended Solid) terhadap air sungai di Laboratoirum Air di salah satu Dinas Lingkungan Hidup Pemerintah. Tujuan penelitian ini adalah untuk mengetahui kadar COD dan TSS dalam bentuk pengawasan kualitas air sebagaimana fungsi dari Laboratorium Air Dinas Lingkungan Hidup Pemerintah. Analisis penentuan kadar COD dilakukan dengan spektrofotometer UV-VIS secara refluks tertutup, sedangkan analisis penentuan kadar TSS dilakukan secara gravimetri. Hasil analisis yang diperoleh kadar COD pada sampel CA 01.31.9 sebesar 36,14 mg/L dan sampel CA 01.31.10 sebesar 36,14 mg/L. Sedangkan kadar TSS pada sampel CA 01.31.9 sebesar 15 mg/L dan sampel CA 01.31.10 sebesar 20 mg/L. Pada Hasil kadar COD tidak sesuai dengan ambang batas baku mutu air, sedangkan kadar TSS masih sesuai dengan ambang batas baku mutu air sehingga dapat digunakan sesuai ketentuan yang telah ditetapkan pada Peraturan Pemerintah Nomor 22 Tahun 2021 tentang Penyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup.
Pembuatan Metil Ester dari Minyak Biji Nyamplung dengan Katalis Zeolit Alam Terembani Zirkonia: Synthesis Methyl Ester from Nyamplung Oil using Zirconia based Natural Zeolite as Solid Heterogeneous Catalyst Adrian Ristanto Adi; Yoga Supriyanto; Hidayat, Arif
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 1 (2024): Volume 9, ISSUE 1,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss1.art6

Abstract

Biodiesel is a renewable energy source that has great potential as an alternative fuel to replace fossil diesel in diesel engines. The potential of feedstock from non-edible oils for biodiesel is being considered with the aim of biodiesel production without negatively impacting food issues. Nyamplung oil is a type of non-edible oil in nature that can be used as a source for biodiesel esterification. This research aims to produce methyl ester from nyamplung oil using Zirconia-embedded natural zeolite catalyst (ZrO2/natural zeolite). The catalyst used was prepared from natural zeolite by impregnation method. The results showed that the free fatty acid conversion was obtained at 89.0% which was achieved at a temperature of 60°C in 80 minutes, a catalyst concentration of 5% wt. of the oil, and a molar ratio of methanol to oil at 9:1 for biodiesel production. The results of this study indicate that ZrO2/natural zeolite catalyst is used to produce biodiesel from nyamplung oil.
Biokomposit dari Serat Daun Nanas dan Serat Fiberglass Menggunakan Matriks dari Limbah Tutup Galon: Biocomposites of Pineapple Leaf Fiber and Fiberglass Fiber Using a Matrix of Waste Gallon Lids Alfi Syahrin Yuliantari; Ulya Nadhatul Shifa; Arifianto Adi Wibowo; Hidayat, Arif
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 1 (2024): Volume 9, ISSUE 1,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss1.art7

Abstract

This research aims to determine the effect of matrix types with natural and synthetic fibers as composite reinforcement on the tensile and bending strength of composites. The types of matrices used are waste gallon lids while the types of fiber used are pineapple leaf fiber and fiberglass. The ratio between matrix material and reinforcing material in the sample varied. Tensile testing uses the ASTM D638 standard size while bending testing uses the ASTM C393 standard size. The overall highest tensile strength is found in pineapple leaf fiber reinforcement against gallon lid matrix with a maximum tensile stress value of 30.39 MPa at a ratio of 1:4. Meanwhile, the lowest tensile strength was found in pineapple leaf fiber against gallon lid waste with the lowest tensile stress value of 3.88 MPa at a ratio of 2:8.
Pengaruh Kondisi Kultur Terhadap Karakteristik Selulosa Bakterial dari Air Kelapa Sebagai Membran untuk Filtrasi Methylene Blue Deby Febrianty Isba Diputri; Muhammad Hammam Zufar Annafie; mutiara, tintin; Ari Tri Marwanto
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 1 (2024): Volume 9, ISSUE 1,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss1.art8

Abstract

The development of the industries affected the increase of wastewater discharged into the environment. Dye is a pollutant that is quite dangerous for human health and ecosystems. Recently, various methods have been found to treat dyes from wastewater. Ultrafiltration wastewater treatment is one method that has minimal weaknesses. Bacterial cellulose is a promising biopolymer for separation processes due to its biocompatibility. This study applied various culture conditions to determine the optimum ones to produce bacterial cellulose membranes. The resulting B4 membrane has the best MB solution filtration capability, with a %removal value of 73.24%.

Page 10 of 12 | Total Record : 118

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