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INDONESIA
Al-Kimia
Published by Universitas Islam Negeri Alauddin Makassar
ISSN : 23022736     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
Al-Kimia is a journal of chemistry that published by Department of Chemistry, Faculty of Science and Technology UIN Alauddin Makassar. The journal is published twice a year on January-June and July-December. This journal encompasses original research articles in all aspects of chemistry and related area. The journal, which was firstly published in July 2013, is a forum for communication of research results, review the results of research, methodologies and new approaches in research related to chemistry in Indonesia.
Arjuna Subject : -
Articles 238 Documents
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Pengaruh Jenis Stripping Agent Pada Fasa Internal Menggunakan Metode Emulsion Liquid Membrane Dalam Pemisahan Logam Pengompleks Purba, Anita Zefanya Marchelina; H Bahti, Husen; P Fauzia, Retna; Pratomo, Uji; Wyantuti, Santhy
Al-Kimia Vol 12 No 1 (2024): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v12i1.46271

Abstract

Heavy metals have a high density, atomic weight, or atomic number. Heavy metals are potentially hazardous to health and the environment and must be separated. Emulsion liquid membrane is a promising technique to remove heavy metal contaminants from industrial and household effluents. Emulsion liquid membrane (ELM) is used to separate heavy metals as it is effective and efficient. ELM involves external, membrane, and internal phases. The internal phase is essential in the separation process as it carries stripping agents to pull metals from the membrane to the internal phase. The choice of stripping agent concentration in the internal phase, such as HNO3, H2SO4, HCl, NaOH, and Na2CO3, affects the extraction efficiency in separating heavying metals using ELM. This article evaluates the effect of stripping agent concentration on extraction efficiency.
Utilization of Green Diluent on the Removal for Heavy Metal Contaminants Using Emulsion Liquid Membrane Kharitas Insani; H Bahti, Husein; Pratomo, Uji; Fauzia, Retna; Santhy Wyantuti; Fajar Firmansyah
Al-Kimia Vol 12 No 1 (2024): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v12i1.46283

Abstract

Growing industries and human activities have increased the amount of waste containing heavy metals, potentially toxic to human health and the environment. Conventional methods for handling heavy metal wastes have limitations, so the current emerging technique is emulsion liquid membrane (ELM), which is easy and inexpensive and leads to green chemistry. The composition of ELMs generally consists of surfactant, extractant, stripping agent, and diluent. In this article, the focus is on the use of environmentally sustainable diluents derived from vegetable oils. The diluent acts as a solvent for the extractant, helping form a stable emulsion and lowering the emulsion breakage percentage. This article aims to evaluate the potential use of vegetable oils as diluents in the Emulsion Liquid Membrane (ELM) process to improve emulsion stability and heavy metal extraction efficiency.
Characteristic and Chemical Compound of charcoal Cocoa Wasted by Pyrolysis Process Wijaya, Mohammad; Pari, Gustan; Amal
Al-Kimia Vol 12 No 1 (2024): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v12i1.46588

Abstract

Indonesia continues to experience a decline in cocoa production due to the aging of cocoa plants, conversion of cocoa plantations, pests, and diseases, as well as the government's focus on food crops. These factors contribute to the problem of decreasing cocoa yields. The objectives of this research are to develop the production of cacao tea from cocoa leaves as a natural herbal drink, and to identify bioactive chemical compounds resulting from the pyrolysis of cocoa waste by controlling temperature and time. The methodology employed in this study includes the analysis of lignin, cellulose, and hemicellulose content in cocoa leaves. The pyrolysis process was conducted at 300°C, 400°C, and 500°C. Extraction was performed using an extractor, where the cocoa leaf waste was mixed with water heated to 80°C for 3 hours. The analysis of flavonoid and antioxidant levels in Pinrang cocoa leaves revealed lignin levels of 43.13%, holocellulose content of 47.11%, alpha-cellulose content of 31.13%, and cellulose content of 43.13%. Proximate analysis of Kolaka Regency cocoa leaves indicated phenol levels of 529.52 mg/kg, catechin levels of 615.71 mg/kg, glucose content of 6.68%, caffeine content of 329.56 mg/kg, carbon content of 52.20%, nitrogen content of 1.24%, hydrogen content of 17.55%, and oxygen content of 29.01%. For cocoa leaf extract from Pinrang Regency, the total flavonoids were 6.01% w/w, while for Kolaka Regency, the total flavonoids were 35.10% w/w. The utilization of cocoa leaves from Kolaka Regency demonstrated superior antioxidant content compared to those from Pinrang Regency. This indicates that cacao tea products made from Kolaka Regency cocoa leaves have great potential for development as a herbal drink. However, there has been limited research on this topic, particularly regarding the use of cocoa waste for cacao tea products.
Risks and Impacts of Chromium Metals on Human and Ecosystem Health Putra, Adewirli; Arman, Eliza; Fitri, Wiya Elsa; Mayaserli, Dyna Putri; Putra, Arief Yandra; Febria, Fuji Astuti
Al-Kimia Vol 12 No 1 (2024): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v12i1.47011

Abstract

This article discusses the harmful effects of chromium metal on human health and the environment. This review aims to provide an in-depth understanding of its negative implications. Analysis of relevant studies provides a comprehensive picture of how Cr (VI) exposure seriously impacts human health and threatens environmental safety. This review method was conducted by identifying and selecting relevant sources through the scientific journal databases PubMed, Google Scholar, and ScienceDirect with the keywords "Cr(VI)," "health risk," "environmental impact," and "chromium metal" then selected and evaluated by considering the quality of the journal, research methodology, and findings. In terms of human health, exposure to Cr(VI) has been shown to increase the risk of death from cardiovascular disease and has significant carcinogenic potential. The impact is not limited to this; Cr(VI) exposure can also cause respiratory problems and skin irritation in industrial workers. In terms of the environment, releasing Cr(VI) into the air, water, and soil threatens living ecosystems. The impact of Cr(VI) pollution on the water and soil environment is of great concern to the quality of water resources and plant growth. In addition, releasing Cr(VI) into the air around industrial plants can also endanger the health of local communities. Therefore, this article highlights the importance of stricter monitoring of chromium-using industries and promoting safer and environmentally friendly alternatives. Implementing preventive and protective measures is essential to minimize the negative impacts of chromium metal on human health and the environment. Using safer alternatives and environmentally friendly production technologies should also be encouraged to create a sustainable and healthy environment for all living beings.
Spectroscopic Characterizations of Sediment in Karanrang Island (Spermonde Archipelago) using FT-IR, XRF and XRD Firman, Nur Faiizah Aqiilah; Armus, Rakhmad; Maming; Zakir, Muhammad; Permatasari Hasra, Adji; Fuad Fathurahman, Achmad
Al-Kimia Vol 12 No 2 (2024): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v12i2.41680

Abstract

Research about spectroscopic characterizations of sediment in Karanrang Island has been carried out. This research aimed to determine the content of mineral in sediment before doing further research (measurement 14C activity in sediment). Sediment sampling was conducted in the middle of the island with a depth of 0.5; 1.0 and 1.5 m. Sediment was analysed by Fourier-transform infrared (FT-IR), X-ray fluorescence (XRF) and X-ray diffraction (XRD). Based on the analysis, minerals were found lime (CaO), aragonite (CaCO3), silicon (Si), quartz (SiO2), strontium (Sr) and strontium oxide (SrO). Minerals contained in sediment are CaO (11.02; 11.20 and 12.11 %), CaCO3 (49.72; 51.84 and 53.57 %), Si (2.89; 3.53 and 3.43 %), SiO2 (11.02; 11.04 and 9.96), Sr (10.19; 7.52 and 10.03 %) and SrO (12.40; 11.96 and 9.15 %). Ca was found in the form of CaO and CaCO3. The results show that CaCO3 was the highest of mineral content in sediment. It can be concluded that sediment in Karanrang Island can be used as a sample for measuring 14C activity.
Effectiveness of Spinach Leaf Extract (Amaranthus spinosus L.) as an Anti-inflammatory against Paw Edema of White Rats (Rattus norvegicus) Aisyah, Sitti; Fauziah, Sitti
Al-Kimia Vol 12 No 2 (2024): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v12i2.47776

Abstract

Spinny leaves (Amaranthus spinosus L.) are widely used in traditional medicine in the community, apart from their function as a food ingredient. Spinach leaves contain active compounds that can treat inflammation. This study investigates the effect of thorn spinach leaf extract on carrageenan-induced oedema of the legs of female white rats (Rattus norvegicus). An experimental method with a randomized block design (RAK) was employed, which consisted of five treatments and three repetitions. The study results showed that spinach leaf extract (Amaranthus spinosus L.) significantly reduced carrageenan-induced inflammation in the feet of female white rats. The anti-inflammatory effect of spinach leaf extract is practical at a dose of 1250 Mg/kg BW.
Characterization of Volatile Compounds of Selected Aromatic Plants from West Java Latifah Alawiyah, Aika; Sifa Sidiqoh; Imas Rohaeni; Desri Yulianti Savitri; Risda Widana
Al-Kimia Vol 12 No 2 (2024): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v12i2.47840

Abstract

Chrysopogon zizanioides (Poaceae), Pogostemon cablin (Lamiaceae), Cymbopogon nardus (Poaceae) and Citrus reticulate (Rutaceae) are known for their abundant essential oils and major commodities in Garut, West Java. Understanding the chemical composition of organic compounds can provide insights into the complex mixture of organic compounds contributing in plants' odour, flavour, and potency. This study aimed to identify the chemical composition of the essential oils of C. zizanioides (roots), P. cabin (leaves), C. nardus (stems), and C. reticulate (leaves and peel). The essential oils were distilled using the hydro distillation method. The chemical composition of essential oils was analyzed by Gas Chromatography-Massa Spectrometry (GC-MS). The results showed that the dominant significant compounds in the essential oil of C. zizanioides roots included valerenal (14.81%). Patchouli alcohol (33.23%) and E-citral (36.18%) were found in P. cabin leaves and C. nardus stems, respectively. The essential oil of C. reticulate leaves and peel contained significant compounds, namely limonene, with a percentage of 30.98% for leaves and 82.58% for peel. Sesquiterpenes were the dominant compounds found in C. zizanioides root and P. cabin leaves oil, while monoterpenes were the major compounds in C. nardus stem, C. reticulate leaves and peel.
Polimer Kitosan-Natrium Tripolifosfat Tercetak Molekul: Sintesis dan Aplikasinya untuk Ekstraksi Residu Antibiotik pada Hasil Peternakan Amanda, Eviomitta Rizki; Sabilillah Lukito Pradana, Alif; Yusril Fitroni, Muhammad; Reza Adzania, Imelda; Nisfi Laili, Wida; Nurfadlilah, Lilik; Satrio Putra, Galih
Al-Kimia Vol 12 No 2 (2024): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v12i2.48765

Abstract

Analysis of antibiotic residues in livestock products is challenging due to the low concentration of antibiotic residues and the complexity of the sample matrix. This study successfully used selective adsorbents from molecular imprinted polymer (MIP) materials for sample preparation. An adsorbent made of chitosan-based molecular imprinted polymer (Chi-MIP) was used to extract tetracycline residues from egg and milk samples. The adsorbent was made by preparing 0.1 grams of Chi-MIP in a 2x2 cm cellulose filter paper bag. Next, an adsorbent containing tetracycline was added to the sample. The extraction process was carried out using a hotplate stirrer. At the end of the extraction process, the extracted antibiotics are removed from the adsorbent through a desorption process in an organic solvent via an ultrasonicator. After that, the desorbed analytes were analyzed via a UV‒Vis spectrophotometer at a wavelength of 267 nm. To obtain optimum results, the extraction conditions were optimized to obtain the following results: extraction time of 12 minutes, desorption time of 3 minutes, and ethyl acetate as the desorbing organic solvent. Using the standard addition method, method validation results were obtained for each milk and egg sample matrix, which indicated a linearity range of 1–5mg/L, a correlation coefficient (R2) of 0.99, accuracy values ​​of 98.22% and 88.10%, precisions of 2.74% and 1.06%, LoDs of 0.4 mg/L and 0.51mg/L, LoQs of 1.52mg/L and 1.70mg/L, and enrichment factors of 3.27.
Phytochemical Test and Sunscreen Activities Ethanol Extract of Guava Tangkalak Leaves (Belluciapentamera) Cahya, Oktania; Dwi Fitri Yani; Muhammad Rayhan; Ayu Wandira; Desi Yana Sari; Rini Handayani; Mega Retha Sefriany
Al-Kimia Vol 12 No 2 (2024): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v12i2.50399

Abstract

One of the most important sources of natural light for life is sunlight, and the skin is the outermost and most significant organ in the human body, making it vulnerable to sunlight exposure. This study aims to determine the biochemistry of secondary metabolite compounds in the guava tangkalak leaves of the plant and their activities as an active ingredient of sunscreen using UV-Vis spectrophotometry. The results of this study indicate that the guava tangkalak leaves plant contains secondary metabolite compounds, such as flavonoids, alkaloids, tannins, saponins, and steroids. The SPF values produced at concentrations of 400, 500, 600, 700, 800, and 1000ppm, SPF values of 2.96, 4.60, 7.70, 10.76, 15.13, and 27.41. The maximum concentration of 1000 ppm protects ultra-categories in SPF.
SIFAT TERMO-VISCOUS RESIN FENOLIK DENGAN RASIO MOLAR FORMALDEHID TERHADAP FENOL YANG BERBEDA Juwono, Ariadne Lakshmidevi; Asraf, Ahmedi; Jihad, Bagus Hayatul; Nugraha Thaha, Yudi
Al-Kimia Vol 12 No 2 (2024): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v12i2.50494

Abstract

Phenolic resin is widely used as a matrix in the composite material. Understanding the thermo-viscous properties of the resin is essential because the viscosity is one of the main factors determining the success of the composite material fabrication. In this study, we synthesized the resin with formaldehyde to phenol molar ratio (F/P) of 1.1, 1.2, 1.3, and 1.4 and analyzed their viscosity as a function of temperature from 17℃ to 25℃. It was observed that the plot of the natural logarithm of the viscosity versus the reciprocal of the temperature of the synthesized phenolic resin is linear. Based on the slope of the Arrhenius plot, the Arrhenius energy of activation varies as a function of the F/P value. The resin’s Arrhenius energy of activation with an F/P value of 1.1, 1.2, 1.3, and 1.4 was 88.8 kJ⁄mol, 96.5 kJ⁄mol, 86.1 kJ⁄mol, and 81.4 kJ⁄mol, respectively. Furthermore, the differential scanning calorimetry (DSC) analysis was conducted on all resins. The endothermic reaction due to water evaporation was found to be dominated at a temperature of around 100℃, and the curing reaction peak of all resins took place at 150℃.

Page 23 of 24 | Total Record : 238

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