Article Per Year (5 Year)
p-Index From 2021 - 2026
2.147
P-Index
This Author published in this journals
All Journal PROSIDING SEMINAR KIMIA KOVALEN: Jurnal Riset Kimia JURNAL ATOMIK
Ika Yekti Lianasari
Unknown Affiliation
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

Published : 13 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 13 Documents
Search

 1   2 
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

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

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
ANALISA KADAR FOSFAT DAN NITRIT PADA SAMPEL AIR DANAU DENGAN MENGGUNAKAN METODE SPEKTROFOTOMETRI Marlisa Roro Putri; Bohari Yusuf; Ika Yekti Lianasari
PROSIDING SEMINAR KIMIA Vol 4 No 1 (2025): Prosiding SNK 2025
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Lake water plays an important role as a water resource and as a habitat for aquatic ecosystems. However, increasing human activities around the lake have led to pollution, particularly by phosphate and nitrite compounds originating from domestic and industrial waste. This study aims to determine the levels of phosphate and nitrite in lake water samples from the southern (AP1) and western (AP2) parts of the Polder using the UV-Vis spectrophotometry method. Phosphate analysis was conducted based on SNI 6989.31:2005, and nitrite analysis was based on SNI 06-6989.9-2004 using a UV-Vis spectrophotometer. The results showed that phosphate levels in samples AP1 and AP2 were 0.053 mg/L and 0.046 mg/L, respectively, while nitrite levels at both points were 0.055 mg/L. These parameters are still below the quality standard thresholds set by Government Regulation No. 22 of 2021. These findings indicate that the water quality of the Polder lake still meets the established environmental standards. Therefore, the UV-Vis spectrophotometry method is effective for water quality monitoring, and the results of this study can serve as a basis for sustainable aquatic environmental conservation efforts. Keywords: Lake, Phosphate, Nitrite and UV-Vis Spectrophotometer.
Preconcentration of Cr (VI) Using Ca-Alginate-EDTA Microcapsules in a Column System for UV-Vis Spectrophotometric Analysis Ika Yekti Lianasari; Aman Sentosa Panggabean; Resma Lita Farlianti
KOVALEN: Jurnal Riset Kimia Vol. 11 No. 2 (2025): December 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.2025.v11.i2.17918

Abstract

This study introduces optimized Ca-Alg-EDTA microcapsules specifically designed as a high-performance column filler for the preconcentration and sensitive detection of toxic Cr(VI) in aquatic systems. Monitoring Cr(VI) at trace levels is critical due to its high toxicity and environmental persistence. Unlike previous alginate-based sorbents, this work focuses on a synergistic EDTA integration within a column-switching framework to enhance retention efficiency (74.73 %) and capacity (0.3995 mg/g). Analytical validation using UV-Vis spectrophotometry demonstrated excellent linearity (R2 = 0.9995) with a low detection limit of 0.014 mg/L, ensuring reliability for samples with minimal analyte concentrations. The method’s robustness was confirmed through Mahakam River water analysis, yielding a 93.05 % recovery in compliance with AOAC 2002 standards. This optimized microencapsulation approach provides a cost-effective and sustainable solution for routine environmental monitoring of heavy metal contamination.
Co-Authors Alimuddin Aman Sentosa Panggabean Aris Munandar Arsyakia, Tarisa Bohari Yusuf Bohari Yusuf Djihan Ryn Pratiwi, Djihan Ryn Farlianti, Resma Lita Krisma Megayanti Dasima Linda Agustina Marlisa Roro Putri Nisa, Muflihatu Khoiratun Putri, Marlisa Roro Resma Lita Farlianti Rumengan, Nur Khamillah Saibun Sitorus Soerja Koesnarpadi Subur P Pasaribu Teguh Wirawan Terra, Patrycia Zulliani