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All Journal The Journal of Pure and Applied Chemistry Research KOVALEN: Jurnal Riset Kimia
Inda, Nov Irmawati
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Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology Medicine & Pharmacology

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Reduksi Kandungan Zat Aktif Anionik dalam Limbah Laundry dengan Memanfaatkan Kombinasi Zeolit dari Tongkol Jagung dan Pseudomonas aeruginosa: Reduction of Anionic Surfactant Content in Laundry Wastewater by Utilizing a Combination of Zeolite from Corn Cobs and Pseudomonas aeruginosa Nea, Sirah Diniati; Nurhaeni; Puspitasari, Dwi Juli; Prismawiryanti; Inda, Nov Irmawati; Sumarni, Ni Ketut; Ruslan
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.i1.16982

Abstract

The increasing environmental pollution is one of the consequences of human activities that continue to expand. The environment has limitations in coping with pollutants generated by humans, such as waste from the laundry industry. This research aims to evaluate the combined effect of zeolite produced from corn cobs and the use of microorganisms capable of degrading anionic surfactants, with the goal of reducing the concentration of anionic surfactants in laundry wastewater. The methods used include adsorption using corn cobs as adsorbents and biodegradation using surfactant-degrading bacteria. Morphological observations using Scanning Electron Microscope (SEM) indicate that the produced zeolite has a crystal structure that stacks up like clumps of cubes. X-ray Diffraction (XRD) analysis shows that zeolite synthesized with a silica extraction ratio from corn cobs and sodium aluminate of 20:20 mL has been successfully conducted. The biodegradation process of anionic surfactants in laundry wastewater using a combination of synthesized zeolite and Pseudomonas aeruginosa bacteria employing the Methylene Blue Alkyl Substance (MBAS) method has shown a decrease in concentration to 1.66 mg/L and degradation of 33.55%, especially in sample 3 with variations of 7.5 grams of corn cob zeolite and 15% microorganisms, during a 5-day experiment.
Sintesis dan Karakterisasi Polivinil Alkohol (PVA) Terlapis Polieugenol: Synthesis And Characterization of Polyvinyl Alcohol (PVA) Coated with Polyeugenol Rahim, Erwin Abdul; Ridhay, Ahmad; Sitti Nur Halizah; Indriani; Sosidi, Husain; Khairuddin; Inda, Nov Irmawati; Nurakhirawati; Mirzan, Moh.; Amar, Aini Auliana
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.i1.17088

Abstract

A study has been conducted on materials containing polyvinyl alcohol (PVA) coated with poly eugenol. This research aims to explore the synthesis process and properties of PVA coated with poly eugenol. Characterization of PVA includes tensile strength measurement and surface observation using SEM. Additionally, the antioxidant activity of PVA was also tested using the DPPH method. In this study, PVA films were obtained by dissolving PVA in a water solvent. The characterization results indicate that the tensile strength ranges from 25.56 to 271.10 Mpa, elongation reaches 315.20 to 320%, and the young modulus ranges from 4.05 to 6.27 Mpa. Surface observation with SEM shows a smooth surface without pores. The antioxidant activity test shows IC50 values ranging from 84.11 to 175.37 ppm.
pH Effect, Isothermal Adsorption, and Adsorption Kinetic Study of Copper(II) Ion into PVA/Alginate Beads Containing Banana Peels Satrimafitrah, Pasjan; Inda, Nov Irmawati; Ketut Sumarni, Ni; Sarapun, Veky; Fridian Aprilia, Natasya; Shiomori, Koichiro
The Journal of Pure and Applied Chemistry Research Vol 12, No 3 (2023): September-December 2023
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2023.012.03.3319

Abstract

Banana peels have been widely used as a biosorbent for metal ion adsorption. However, the small size of banana peels as a biosorbent leads to difficulty in the separation process of banana peels from the aqueous solution. Thus, the banana peels were impregnated into PVA/Alginate beads to increase the biosorbent size using the (W/O) emulsion process. Various amounts of banana peels were impregnated into beads. The obtained beads were used to adsorb copper(II) ions from aqueous solutions. The result shows that beads could extract the copper(II) ion from an aqueous solution containing 0.7875 ppm copper(II) ion at pH 4 with the quantity of extraction was 0.729 mmol/g. The effect of contact time and initial concentration indicates that the adsorption process of copper(II) ion from aqueous solution using beads follows the Langmuir isothermal adsorption and the adsorption kinetic follows the pseudo-second-order equation. Hence, the adsorption mechanism follows a chemisorption process with monolayer formation on the PVA/Alginate containing banana peels. Further investigation was carried out and found that the surface reaction and film diffusion occurred at initial stage of contact time, adsorptive diffusion through pores occurred at the later stage.
Co-Authors Ahmad Ridhay Aini Auliana Amar Dwi Juli Puspitasari Erwin Abdul Rahim Fridian Aprilia, Natasya Husain Sosidi Indriani Khairuddin Khairuddin Moh. Mirzan Nea, Sirah Diniati Ni Ketut Sumarni Nurakhirawati Nurhaeni Pasjan Satrimafitrah Prismawiryanti Prismawiryanti Ruslan Sarapun, Veky Shiomori, Koichiro Sitti Nur Halizah