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INDONESIA
PROSIDING SEMINAR KIMIA
Published by Universitas Mulawarman
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
Arjuna Subject : -
Articles 502 Documents
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KAJIAN LITERATUR PEMANFAATAN ADSORBEN ARANG AKTIF LIMBAH ORGANIK TERMODIFIKASI SURFAKTAN (SLS/SDS) TERHADAP ION LOGAM BERAT Terra, Patrycia Zulliani; Yusuf, Bohari; Lianasari, Ika Yekti
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

A literature review of the use of surfactant-modified organic waste activated charcoal adsorbents (SLS/SDS) on the percent absorption and adsorption capacity of heavy metal ions has been carried out. The surfactants used are sodium lauryl sulfhate (SLS) and sodium dodecyl sulfhate (SDS). The organic waste activated charcoal used includes rice husks, teak wood sawdust, bamboo, salak fruit skin and coconut shells. From this study, it was found that activated charcoal predominantly contains cellulose and its derivatives which can be a carbon source. Modification with surfactants (SLS/SDS) aims to increase the adsorption capacity, absorption percentage and also the surface area of the adsorbent. The modification process is by mixing surfactant and activated charcoal with a certain weight and then homogenizing. The mixture was then neutralized with distilled water. Next, it is placed in the oven at a certain temperature, then crushed and sieved with a 100 mesh size. Next, the activated charcoal-surfactant adsorbent is contacted with heavy metal ions such as Pb2+, Cr3+, Cr6+, and Ni2+. The absorption results obtained ranged from 93.50 – 99.89%, with an adsorption capacity of 0.144 – 81.300 mg/g. The size of the percent absorption value and adsorption capacity is influenced by the surface area, activator substance, contact time, pH, and also the concentration of the adsorbate. Keywords: Activated Charcoal, Heavy Metal Ions, SLS, SDS, Modification
FRONT MATTER SNK 2024 Widodo, Nanang Tri
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

UJI FITOKIMIA DAN TOKSISITAS EKSTRAK METANOL BATANG TANAMAN BINTARO (Cerberra manghas L.) TERHADAP BIBIT IKAN NILA (Oreochromis niloticus) Febry, Muhammad; Usman, Usman
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Indonesia is a country located along the equator and has a tropical and subtropical climate. This condition supports the growth of various plant species with high diversity. Bintaro, or Cebera manghas, belongs to the Apocynaceae family and is believed to have potential as a vegetable insecticide. The purpose of this study was to determine the secondary metabolite compounds contained in methanol extract of bintaro plant stems and to determine the toxicity level of methanol extract of bintaro plant stems. This research method consists of 3 stages, namely extraction, phytochemical test (color test) and toxicity test. Extraction is done by maceration method using methanol solvent. Phytochemical test was done by color test. Toxicity test was conducted using BSLT method. The results of the toxicity test of methanol extracts of bintaro plant stems have an LC50 value of 100.697 and obtained the results of phytochemical tests of bintaro plant stems containing alkaloid and flavanoid compounds. Based on the LC50 value, it can be concluded that the methanol extract of bintaro plant stems falls into the medium category and contains alkaloid and flavanoid compounds. Keywords: Cerbera Manghas L., Bintaro, Phytochemical Test, Toxicity Test
POTENSI BEBERAPA SUMBER KARBOHIDRAT SEBAGAI BAHAN DASAR PEMBUATAN BIOETANOL MELALUI FERMENTASI Rahman, Fathur; Mahrus, Muhammad Haissul; Fahmi, Miraz’hul; Pratama, Riansyah Dimas; Aswat, Muhammad Raihan; Rizkirullah, Muhammad Aditya; Kartika, Rudi
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

This literature review aims to determine the potential of various carbohydrate sources as raw materials for bioethanol production through fermentation to achieve maximum ethanol concentration. The hydrolysis process is conducted enzymatically using microbes during the liquefaction stage and gluco-amylase during the saccharification stage, followed by fermentation by microbes. The literature results show that the carbohydrate source, Ganyong tuber (Canna edulis Kerr.), produces a maximum ethanol concentration of 84.451% with a fermentation period of 7 days. Keywords: Bioethanol, Fermentation, Hydrolysis, Carbohydrate
ULASAN KANDUNGAN METABOLIT SEKUNDER DAN KAJIAN BIOAKTIVITAS PADA RUMPUT TEKI (Cyperus rotundus L.) Nurbah, Sahriana Putri; Sitorus, Saibun; Hairani, Rita
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Nutgrass (Cyperus rotundus L.) is one of the Cyperaceae family plants which is this plant belongs to weed. However, it is often used by the Chinese people as a traditional medicine. This review aimed to determine the bioactivity of nutgrass based on their secondary metabolite content. This review was carried out by Literature Review Article method from various journals through Google Scholar and Science Direct. The results of this review indicated that nutgrass has important bioactivities such as antioxidants, antidiabetic, anti-inflammatory, anticancer and antibacterial. Based on the review of those articles, it can be concluded that nutgrass has several important potency for human health to be further studied. Keywords: Cyperus rotundus L, Bioactivity, Secondary Metabolites
MINI REVIEW: SINTESIS DAN KARAKTERISASI NANOPARTIKEL ZnO DENGAN METODE PRESIPITASI Bergita, Angela; Hindryawati, Noor; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

ZnO nanoparticles are materials composed of particles ranging in size from 1 to 100 nm and can be produced through the precipitation method. This method is highly popular due to its cost-effectiveness. Numerous studies on the synthesis of ZnO nanoparticles using the precipitation method have been conducted. This mini-review aims to explore the characteristics of nanoparticles synthesized using the precipitation method. The approach employed in this journal involves a literature review of several journals focusing on the synthesis of ZnO nanoparticles through precipitation. The synthesis results in ZnO nanoparticles with sizes ranging from 4.38 nm to 1400 nm, possessing a hexagonal wurtzite crystal structure and bandgaps ranging from 3.57 to 3.7943 eV. Based on the conducted review, it can be concluded that the material that yields small-sized nanoparticles with high purity includes the precursor ZnSO4(H2O)7, deionized water as the solvent, and NH4OH as the catalyst. Keywords: Nanoparticles, Precipitation, Zinc Oxide
REVIEW ARTIKEL: KARAKTERISASI EDIBLE FILM DARI KARAGENAN RUMPUT LAUT (Eucheuma Cottoni/Kappaphycus alvarezii) Nur, Nana Septiana; Pasaribu, Subur P.; Panggabean, Aman Sentosa
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Seaweed is a type of multicellular organism with fast growth. Seaweed is quite abundant and is in great demand in several fields, both industrial and pharmaceutical. There are 3 types of seaweed, including brown with polysaccharides such as alginate, fucoidan and laminarin. Green seaweed with polysaccharides such as ulvan. Red with polysaccharides such as agar and carrageenan. Carrageenan is a hydrocolloid of Kappaphycus alvarezii/Eucheuma cottonii which has been extracted with an alkaline solution or water. Carrageenan has the property of being able to form a stable gel, is edible, renewable and rich in fiber so it has the potential to be used as an edible film. Edible film is a layer that can be eaten and has a role as a barrier to moisture. Based on the literature, making edible film from seaweed carrageenan with a higher concentration of seaweed results in a decrease in the transmittance value and transparency level of the edible film. The addition of a higher concentration also produces edible film with a lower water content, namely 21.16%, and has a tendency for slower dissolution compared to lower seaweed concentrations. The higher the concentration of carrageenan used in making edible film, the higher its solubility, the stronger its tensile strength, the thicker and more resistant it is, and the lower the vapor transmission rate or the higher the ability to hold water. Keywords: Seaweed (Eucheuma cottonii), carrageenan, edible film
KORELASI NILAI INHERENT MOISTURE TERHADAP NILAI CALORIFIC VALUE STANDAR AMERICAN SOCIETY OF TESTING AND MATERIALS (ASTM) DI PT TRIYASA PIRSA UTAMA SAMARINDA Josephine, Josephine; Pasaribu, Subur P.; Panggabean, Aman Sentosa
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Coal is one of the main fuel sources for electricity generation in Indonesia. Coal contains inherent moisture water content and chemical calorific value. The Inherent Moisture value in coal is one of the main characteristics of coal that determines the quality of the coal. The calorific value of coal was determined from the values ​​of Total Moisture, Ash Content and Total Sulfur which are the determining parameters for coal quality. The aim of this research is to determine the correlation between the Inherent Moisture value and the Calorific Value of coal with ASTM standards. This research was conducted at PT Triyasa Pirsa Utama Samarinda using 10 different coal samples to analyze the Inherent Moisture value and Calorific Value. Based on the data from the analysis and graphs, a correlation between the Inherent Moisture (IM) and Calorific Value (CV) values ​​is inversely proportional, where the higher the IM value, the lower the CV value in the coal sample. The factors that influence changes in IM and CV values ​​are climate, weather, coal storage time and coal grain size degradation. Keywords: Coal, Moisture, Calorific Value, ASTM Standard.
REVIEW ARTIKEL: IDENTIFIKASI FITOKIMIA, POTENSI AKTIVITAS ANTIOKSIDAN DAN TOKSISITAS DAUN BALAKACIDA (Chromolaena odorata L.) Marsella, Virna Rindra; Saleh, Chairul
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Balakacida is a plant that grows in open areas and thrives in plantations, so this plant is often referred to as a weed. This plant is often used as a live pharmaceutical plant to cure several diseases. Various studies on the phytochemical content of Balakacida plants have been conducted. Phytochemical identification of Balakacida plants shows that Balakacida plants contain phytochemical aglycones, flavonoids, terpenoids, essential oils, alkaloids, saponins, tannins and steroids. Literature studies show that Balakacida leaves have toxicity activity shown in the LC50 value. The LC50 values obtained in the crude extract, n-hexane fraction, ethyl acetate are 2.88 ppm, 8.12 ppm and 6.86 ppm respectively. It is known that Balakacida plants have high antioxidant content, this is influenced by its high flavonoid levels. In Balakacida leaf extract, having an IC50 value of 23.4 µg/mL. So that researchers can conclude that Balakacida leaf extract has phytochemical content of aglycone groups, flavonoids, terpenoids, essential oils, alkaloids, saponins, tannins and steroids, with very strong toxicity and antioxidant activity. Keywords: Antioxidant, Balakacida, phytochemical identification, toxicity
ANALISIS TERMOGRAVIMETRI MIKROALGA SPIRULINA PLATENSIS DENGAN LAJU PEMANASAN 10ºC/MENIT Claudia B. P, Chintya Zalza Laola; Subagyono, RR Dirgarini Julia Nurlianti; Kassim, Mohd Asyraf
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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The pyrolysis of Spirulina platensis microalgae using thermogravimetric analysis at a heating rate of 10°C/min has been conducted. This study aims to examine the characteristics of Spirulina platensis microalgae through its thermal decomposition behavior and the active and passive pyrolysis temperature ranges in the microalgae powder. Based on the analysis results, Spirulina platensis microalgae contains 8.34% moisture and 7.18% ash content. The decomposition pattern of Spirulina platensis microalgae is divided into three stages: the water evaporation stage occurs at temperatures ≤ 150ºC, the active/main pyrolysis stage occurs in the temperature range of 150-502°C, and the passive pyrolysis stage occurs at temperatures ≥ 502°C. Keywords: Spirulina platensis, Pyrolysis, and Thermogravimetric Analysis.

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