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All Journal PROSIDING SEMINAR KIMIA KOVALEN: Jurnal Riset Kimia Jurnal Kimia Mulawarman JURNAL ATOMIK
Lianasari, Ika Yekti
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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PEMBUATAN DAN KARAKTERISASI ADSORBEN KITOSAN–SILIKA DAN PENGAPLIKASIAN TERHADAP ADSORPSI ION Cd2+ Nisa, Muflihatu Khoiratun; Lianasari, Ika Yekti; Koesnarpadi, Soerja
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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The Research has been conducted on the synthesis of chitosan-silica adsorbents from chitosan and silica derived from TEOS (Tetraethyl Orthosylicate). The chitosan-silica was made by mixing chitosan solution and silica soles that were previously chitosan we were added with acetic acid and silica solution we were added with aqueous solution, ethanol and HCl(p). The result from characterization of FT-IR chitosan-silica adsorbents indicates the presence of OH, NH2, Si-O, Si-O-Si, chitosan adsorbents that only have OH and NH2 groups and silica adsorbents that only have OH, Si-O and Si-O-Si groups. Application of chitosan, silica and chitosan-silica adsorbents to adsorp Cd2+ ion. Cd2+ ion concentration after adsorption was determined by atomic absorption spectrophotometer (AAS). Adsorption Cd2+ ion in chitosan-silica successfully indexed Cd2+ by 98.67% while for chitosan adsorbents by 97.87% and while silica adsorbents by 79.45%. The Sem results showed that when adsorbents before soaking with Cd2+ it was seen that the morphology of the surface of the pores adsorbent there is still a cavity then when after soaking with Cd2+ pores filled by ions Cd2+.
PENENTUAN VARIASI KOMPOSISI DAN pH OPTIMUM ADSORBEN KITOSAN-Fe3O4 BERDASARKAN PERSEN PENYERAPAN ION Pb2+ Lianasari, Ika Yekti; Koesnarpadi, Soerja; Pratiwi, Djihan Ryn; Munandar, Aris
JURNAL ATOMIK Vol 8 No 1 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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Previously, the synthesis of Chitosan-Fe3O4 adsorbent from magnetite (Fe3O4) made from ferrous ammonium sulfate (III) and ferrous ammonium sulfate (II) in a ratio of 3:1 was carried out. The adsorbent is adjusted with the ratio of magnetite and chitosan composition 1:1; 1:2 and 2:1 with the help of glutaraldehyde as a crosslinker. The results showed that the ratio of the ideal composition is 1:1 with % absorption that is 94.97% in 24 hour, and the optimum pH is obtained at pH 5 with % absorption of 92.18% for Pb2+ ions.
PEMANFAATAN ARANG AKTIF DARI LIMBAH SERBUK GERGAJI KAYU BANGKIRAI (Shorea Laevifolia Eudert) SEBAGAI ADSORBEN ZAT WARNA RHODAMIN B Agustina, Linda; Sitorus, Saibun; Lianasari, Ika Yekti
JURNAL ATOMIK Vol 6 No 2 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Penelitian yang telah dilakukan mengenai pemanfaatan arang aktif dari limbah serbuk gergaji kayu bangkirai sebagai adsorben zat warna Rhodamin B. Arang aktif dikarakterisasi menggunakan Scanning Electron Microscopy (SEM). Didapatkan hasil karakterisasi SEM sebelum dikontakkan dengan Rhodamin B pada perbesaran 2.000 kali dan 5.000 kali bentuk morfologi permukaan seragam dan merata sedangkan sesudah dikontakkan dengan Rhodamin B pada perbesaran 2.000 kali dan 5.000 kali bentuk morfologi permukaan tidak seragam dan merata. Rhodamin B diadsorpsi oleh arang aktif dan diukur dengan menggunakan Spektrofotometer UV-Vis pada panjang gelombang maksimum 554 nm. Didapatkan hasil kondisi optimum pada proses adsorpsi Rhodamin B sebanyak 25 mL adalah pada massa adsorben 0,2 gram, konsentrasi Rhodamin B 3 ppm dan waktu adsorpsi 45 menit dengan % teradsorpsi sebesar 96,37%.
Kinerja Analitik Mikrokapsul Magnetit - Alginat (MNPs-ALG) untuk Analisis Ion Logam Cu(II) dan Aplikasinya pada Sampel Alam: Analytical Performance of Magnetite - Alginate Microcapsules (MNPs-ALG) for Analysis of Cu(II) Metal Ions and Their Application in Samples Lianasari, Ika Yekti; Aman Sentosa Panggabean; Bohari Yusuf; Alimuddin; Koesnarpadi, Soerja
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 1 (2024): April Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i1.16574

Abstract

Research has been carried out regarding the synthesis of Magnetite-Alginate microcapsules (MNPs-ALG) and applied to Cu (II) metal ions. The nature of magnetic nanoparticles, Fe3O4 which easily form aggregations can be overcome by this encapsulation process, but a very efficient separation process is also very much needed in the analytical separation process.The process of making magnetite nanoparticle compounds is carried out first using FeCl2.4H2O and FeCl3.6H2O and adding concentrated ammonia at a temperature of 90οC until the solution becomes blackish in color. The dry magnetite, Fe3O4, nanoparticles were then dissolved in distilled water and thickened with Na-Alginate then dropped slowly into a 1 M CaCl2 solution. The results of characterization using SEM showed that there were differences in morphology before and after contact, and there was 0.98% mass of Cu elements on the EDS results.The microcapsule adsorption optimization test gave results for the best adsorption percentage >90% on a mass variation of magnetite (MNPs) of 0.3 grams; pH 5; contact time of 30 minutes and retention capacity of 185.95 mg/gram, at a Cu(II) concentration of 800 ppm. Analytical performance shows the best results with linearity parameters with a correlation coefficient of 0.999; the detection limit and quantitation limit are 0.0516 ppb and 0.1720 ppb with a lifetime of four times. The application of samples in the form of river water samples shows a percent recovery value of around >90%, indicating that there is no matrix that significantly influences the measurements.
KAJIAN LITERATUR PEMANFAATAN ADSORBEN KITOSAN TERMODIFIKASI ARANG AKTIF LIMBAH ORGANIK TERHADAP LOGAM BERAT Arsyakia, Tarisa; Koesnarpadi, Soerja; 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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A literature review on the utilization of chitosan adsorbent modified organic waste activated charcoal against heavy metals has been conducted. From the results of the study, it was obtained that organic waste activated charcoal still has chemical content in the form of cellulose, lignin, hemicellulose, carboxymethyl cellulose ranging from 33.61-65,7%. The carbon compounds formed ranged from 66.60-86.4%. The organic waste activated charcoal used includes coffee grounds; tea grounds; teak wood powder; coconut shell; durian peel waste; pineapple peel waste; salak fruit seed waste; and rubber fruit shell. Activated charcoal is modified with chitosan to optimize pores, expand the surface, and increase adsorption power. The modification process is by mixing chitosan with a certain weight and dissolving it in 1-3% CH3COOH, then adding activated charcoal with a certain weight, stirring until a homogeneous gel is formed. Next, it was baked at 60ºC for 24 hours. The results formed were mixed into NaOH with a certain concentration, then washed with distilled water until neutral and stored in a desiccator. The chitosan - activated charcoal adsorbent was then contacted with heavy metals Arsenic (As); Lead (Pb); Cadmium (Cd); Copper (Cu); Zinc (Zn); and Iron (Fe). The results obtained percent absorption and adsorption capacity ranged from 85.32-99.992% and 0.1236-177.7035 mg/g. The values of percent absorption and adsorption capacity are influenced by the surface area, concentration, and adsorbent that needs to be activated. Keywords : Activated Charcoal, Chitosan, Modification, Heavy Metal
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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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
ADSORPSI ION LOGAM Pb2+ DENGAN ARANG AKTIF MAHKOTA NANAS (Ananas comosus (L.) Merr) TERMODIFIKASI KITOSAN Arsyakia, Tarisa; Koesnarpadi, Soerja; Lianasari, Ika Yekti
JURNAL ATOMIK Vol 10 No 1 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i1.1436

Abstract

Pineapple (Ananas comosus (L.) Merr) is one of the most widely produced plants in Indonesia. Pineapple crown can be classified as solid waste that has an impact on the environment. Another problem of environmental pollution is heavy metals such as lead. In this study, modification was carried out by adding chitosan to the activated charcoal prepared from pineapple crown powder waste. The purpose of this study was to determine the characterization of chitosan-modified pineapple crown activated charcoal using Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM), determine the optimum adsorption conditions based on variations in pH, contact time and concentration of Pb2+ metal and determine the percent absorption and adsorption capacity. The results of FT-IR characterization of pineapple crown charcoal, chitosan and chitosan-modified activated charcoal indicated the presence of O-H (streching), N-H, C-H (streching), C=C aromatic and C-H (bending) groups, and in pineapple crown charcoal and chitosan-modified pineapple crown activated charcoal also indicated C-O-C groups while chitosan indicated C-N groups. In the results of SEM characterization, pineapple crown charcoal has a smooth, chitosan has a rough and chitosan-modified activated charcoal has a slightly rough surface and is still tightly bound to each other. The optimum conditions for adsorption of chitosan-modified activated charcoal on Pb2+ metal ions at pH 4 with a contact time of 60 minutes and a concentration of 75 mg/L. The results of the adsorption capacity test at each pH variation, contact time and concentration of Pb2+ metal ions were 2.4154 mg/g, 14,89 mg/g and 15,1732 mg/g.
REVIEW ARTIKEL: ANALISIS pH, KONDUKTIVITAS, DAN OKSIGEN TERLARUT PADA AIR SERTA KADAR LOGAM BESI MENGGUNAKAN SPEKTROFOTOMETRI UV-VIS Putri, Marlisa Roro; Yusuf, Bohari; Lianasari, Ika Yekti
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A literature review on the analysis of conductivity, ph and Dissolved Oxygen parameters and the application of uv-vis spectrophotometry in measuring iron metal levels in water was conducted. This literature review reviewed several studies related to water quality analysis with several parameters and measurement of total iron levels. Commonly used parameters include pH, conductivity, Dissolved Oxygen (DO), and iron metal levels. Measurements are made with tools such as pH meters, conductivity meters, DO meters, and UV-Vis spectrophotometry for iron metal levels. The use of UV-Vis spectrophotometry as a detection method was chosen due to its accuracy in quantitative analysis and its ability to identify dissolved metal species non-destructively. The results showed significant variations in these parameters at various locations. Some of these parameters did not meet the recommended water quality standards. The iron metal concentration data obtained showed variations in values depending on the type of complexant used in each sample. The main factors of concern are heavy metal contamination, especially iron, as well as low Dissolved Oxygen levels. The importance of regular water quality monitoring and better management is emphasized to maintain environmental balance and public health. Keywords : Water quality, Dissolved oxygen, Conductivity, pH, Iron.
REVIEW ARTIKEL: BEBERAPA METODE MIKROENKAPSULASI ADSORBEN BERBASIS ALGINAT DAN APLIKASINYA UNTUK MENGHILANGKAN ION LOGAM DALAM LARUTAN BERAIR Farlianti, Resma Lita; Panggabean, Aman Sentosa; Lianasari, Ika Yekti
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Alginate is a natural polysaccharide consisting of mannuronic acid and guluronic acid connected via glycosidic bonds. Alginate has properties of biocompatibility, biodegradability, and reports in nature that make it attractive as a base material in microencapsulation applications. Microencapsulation is a technology used to coat active ingredients in small particles with the aim of increasing stability, solubility, and controlling the release of active substances. This article aims to review research results related to various methods of alginate microencapsulation as an adsorbent taken from several scientific articles. This literature review shows that encapsulation methods are divided into two categories, namely physical and chemical methods as well as several technologies such as coacervation, spray drying, extrusion, freeze drying and layer-by-layer coating. Alginate-based adsorbents, especially modified ones, show a better capacity to absorb heavy metals than pure alginate with adsorption capacities ranging from 0,025 mg/g to 416,67 mg/g. The adsorption efficiency is influenced by the physicochemical properties of the adsorbent and external conditions such as pH and metal ion concentration. With its various advantages, alginate-based microencapsulation has great potential for application in various industrial fields, especially in air purification, pharmaceuticals and nutrition. Keywords : Alginate, Microencapsulation, Adsorbent, Metal
REVIEW ARTICLE: PEMANFAATAN MIKROKAPSUL ALGINAT SEBAGAI ADSORBEN ION LOGAM Rumengan, Nur Khamillah; Panggabean, Aman Sentosa; P. Pasaribu, Subur; Lianasari, Ika Yekti
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A review article has been carried out on the use of alginate microcapsules as metal adsorbents. From the review of this article, it was found that metal pollution would harm the environment, so alginate microcapsules were made which have a carboxylic acid group, namely carboxyl which is able to bind with a metal. The metals that are adsorbed are Cd2+, Cu2+, Mn2+, Cr6+, Ni2+. The microcapsules reviewed in this article include Ca-Alginate-EDTA Microcapsules, Magnetite-Alginate Microcapsules (MNPs-ALG), Alginate and Alginate/ Montmorillonite Films, polyvinyl alcohol-Na-alginate Microcapsules, Ca-alginate-DMG. The aim of modifying alginate microcapsules is to increase the metal absorption capacity, metal absorption recovery and surface area of ​​each adsorbent. The way alginate microcapsules work is by exchanging unstable ions and the flow and stirring speed will affect the shape and size of the microcapsules. Slow stirring will produce microcapsules with a larger particle size because during the stirring process large droplets are formed. The absorption results obtained ranged from 84-119% and the adsorption capacity was 0.0301 - 185.95 mg/g. Keywords : Adsorption, Alginate, Metal Ions, Microcapsule
Co-Authors Alimuddin Aman Sentosa Panggabean Aris Munandar Arsyakia, Tarisa Bohari Bohari Bohari Yusuf Bohari Yusuf Djihan Ryn Pratiwi, Djihan Ryn Farlianti, Resma Lita Linda Agustina Nisa, Muflihatu Khoiratun Putri, Amelia Putri, Marlisa Roro Rumengan, Nur Khamillah Saibun Sitorus Soerja Koesnarpadi Subur P Pasaribu Terra, Patrycia Zulliani