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All Journal Journal of Engineering and Technological Sciences ASEAN Journal for Science and Engineering in Materials
Al Kindi, Ghayda Yaseen
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Upcycling Polymeric Waste into Interpenetrating Polymer Network Adsorbents for Sustainable Wastewater Treatment Al Kindi, Ghayda Yaseen; Kadhim, Rana J.; Ihsan, Elaf Abd Al-Azal; Al-Haddad, Sinan A.
ASEAN Journal for Science and Engineering in Materials Vol 5, No 1 (2026): (ONLINE FIRST) AJSEM: Volume 5, Issue 1, March 2026
Publisher : Bumi Publikasi Nusantara

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Abstract

This study reports the sustainable synthesis, characterization, and application of Interpenetrating Polymer Networks (IPNs) derived from post-consumer polystyrene kitchenware and epoxy resin residues as a cost-effective adsorbent for amoxicillin removal from wastewater. The conversion of these polymeric wastes into functional materials aligns with circular economy strategies. Batch adsorption experiments were carried out to examine the effects of key operational parameters, including adsorbent dosage, contact time, and solution pH. The results showed a maximum removal efficiency (96%) at an adsorbent dosage of 0.1 g and pH 5. Kinetic analysis indicated that the adsorption process followed a pseudo-second-order model, suggesting chemisorption as the dominant mechanism, with an equilibrium adsorption capacity (qe) of 8.13 mg/g. Isotherm modeling demonstrated that the Langmuir model provided the best fit, confirming monolayer adsorption on a homogeneous surface, while Temkin parameters indicated favorable adsorption energetics. Overall, these findings highlight the potential of waste-derived IPNs as eco-friendly and highly effective materials for removing pharmaceutical contaminants from aqueous environments, contributing to the advancement of sustainable wastewater treatment technologies.
Sustainable Stabilization of Clay Soil with Rice Husk Ash Abdulrahman, Shaimaa M.; Al Kindi, Ghayda Yaseen; Ihsan, Elaf Abd Al–AzaI
Journal of Engineering and Technological Sciences Vol. 56 No. 4 (2024)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2024.56.4.2

Abstract

Groundwater-exposed liquid clay soil (CL) makes foundations unstable. This study used recycled rice husk ash and treated clay soil exposed to groundwater with low-cost, environmentally friendly materials. This paper presents a recent prediction of three equations that link the plastic index to soil strength, cohesion, and the bearing capacity of a foundation. This prediction takes into account the soil’ characteristics before and after treatment, as well as the cumulative load until failure. It creates four models before and after treatment, as well as a different time period after treatment, to study the situation. This is achieved by mixing the best-added ratios in depth equal to the foundation width. The limitations of Atterberg, and the unconfined compressive strength were tested using three additives: cement alone, rice husk ash alone, and rice husk ash plus 2% cement. The percentages were 4%, 6%, 8%, and 10% of the soil weight. It was noted that soil activity dropped from 0.98 to 0.31, 0.32, and 0.42 for cement 8%, rice husk ash 8% plus 2% cement, and 8% RHA alone. The foundation bearing capacity increased from 49 at 1 day to 115, 275, and 460 Kpa for 7, 14, and 28 days, respectively.
Co-Authors Abdulrahman, Shaimaa M. Al-Haddad, Sinan A. Ihsan, Elaf Abd Al-Azal Ihsan, Elaf Abd Al–AzaI Kadhim, Rana J.