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All Journal JESCEE- Journal of Emerging Supply Chain, Clean Energy, and Process Engineering Molekul: Jurnal Ilmiah Kimia
Dahliyanti, Ayu
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Cationic Dye Adsorption Using Silica Xerogel from Corn Husk in A Continuous Fixed-Bed Column Dahliyanti, Ayu; Nabila, Luthfia Jihan; Pratama, Arka Krisna; Widharyanti, Ika Dyah
Molekul Vol 19 No 2 (2024)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2024.19.2.11192

Abstract

ABSTRACT. Silica xerogel from corn husks shows potential to be applied as an adsorbent for cationic dye removal due to its high adsorption capacity. However, the study regarding its performance in a continuous operation is still very limited, which hinders its application as a commercial adsorbent. To answer that problem, we investigate the adsorption of methylene blue (MB) and crystal violet (CV) dye using silica xerogel from corn husk in a continuous fixed-bed column. A breakthrough curve analysis was carried out with flow rate and bed height variations in an up-flow mode. The column effluent concentration was analyzed using a UV-Vis Spectrophotometer. The experimental data shows good agreement with the Thomas/Bohart-Adams and Yoon-Nelson model at different flow rates but has less correspondence for increasing bed height. Maximum adsorption capacities for methylene blue were 1.977 mg/g (Thomas/BA) and 1.743 mg/g (experimental). While for crystal violet the maximum adsorption capacities were 3.400 mg/g (Thomas/BA) and 4.573 mg/g (experimental). Keywords: adsorption, cationic dyes, silica xerogel, fixed-bed column, mathematical model.
Transparency and Thermal Stability of Silica Aerogel Synthesized From Sodium Silicate Using Ambient Pressure Drying Hardiane, Egiana Reshi; Purba, Gita Evi Monika; Dahliyanti, Ayu
Journal of Emerging Supply Chain, Clean Energy, and Process Engineering Vol 2 No 2 (2023): Journal of Emerging Supply Chain, Clean Energy and Process Engineering
Publisher : Universitas Pertamina

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57102/jescee.v2i2.68

Abstract

Silica aerogel is a special material due to its low density, high transparency, and high thermal stability. Producing silica aerogels in an inexpensive and environmentally friendly way is the focus of recent research. Here, silica aerogel is synthesized from sodium silicate as silica source and surface modification with organosilanes, followed by ambient pressure drying at various conditions. The resulting aerogels were analyzed for their density, transparency, and thermal stability. Silica aerogel with a low density of 0.4031 g/cm3 was successfully synthesized with polydimethylsiloxane (PDMS) as modifying agent at 7:50 solvent ratio. The aerogel can withstand heat up to 400°C.This shows the potential of aerogel to be applied as thermal insulator in various fields.
Co-Authors Hardiane, Egiana Reshi Nabila, Luthfia Jihan Pratama, Arka Krisna Purba, Gita Evi Monika Widharyanti, Ika Dyah