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Publication Index: WoSPublisher: Elsevier B.V.

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    Citation - WoS: 8
    Citation - Scopus: 8
    Polyethyleneimine Functionalized Waste Tissue Paper@waste PET Composite for the Effective Adsorption and Filtration of Organic Dyes From Wastewater
    (Elsevier B.V., 2025) Radoor, Sabarish; Karayil, Jasila; Devrim, Yilser; Kim, Hern
    This study explores the potential of repurposing discarded plastic bottles and cellulosic paper waste to develop cost-effective and high-performance composites for dye removal applications. A novel composite, polyethyleneimine (PEI)-functionalized waste tissue integrated into waste polyethylene terephthalate (wPET) (PEIWT/wPET), was designed as an environmentally friendly adsorbent for wastewater treatment. Successful surface functionalization with PEI was confirmed through FTIR, EDX, and XPS analyses. The PEI-modified composite exhibited enhanced mechanical and thermal stability while demonstrating significantly improved dye adsorption/filtration performance. The composite was evaluated for the removal of both cationic (crystal violet, CV) and anionic (orange II, O II) dyes under optimized conditions; (10,000 mg/L and 1666 mg/L) adsorbent dosage, (11 and 1) pH, 10 mg/L initial dye concentration, and (180 min and 120 min) contact time for CV and O II respectively. Experimental results showed that PEIWT/wPET achieved maximum adsorption capacities of 3.94 mg/g for CV and 11.73 mg/g for O II, approximately five times higher than the unmodified composite (0.74 and 2.4 mg/g). Adsorption isotherm and kinetic studies indicated that the data aligned well with the Langmuir as well as Freundlich and pseudo-second order models. The membrane also exhibited filtration capability for both dyes, achieving a filtration efficiency of 78.69 % for anionic and 41.31 % for cationic dye separation. Overall, the PEIWT/wPET composite offers a promising, sustainable, and energy-efficient solution for the removal of organic pollutants.
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    The Effect of Two Different Types of Daily Disposable Monofocal Contact Lenses on Ocular Wavefront Aberrations
    (Elsevier B.V., 2025) Yakar, K.
    Background: To compare the effect of two daily disposable soft contact lenses on ocular wavefront aberrations. Methods: This study included 34 eyes from 17 patients aged 18 to 40 years (mean age: 27.12±8.3 years) with identical myopic refractive errors in both eyes without astigmatism and requesting contact lens use. Initially, wavefront aberrations; total, tilt, high, total coma, total trefoil, total 4.foil, sphere, high astigmatism, RMS (3 mm/5 mm) were measured using Nidek OPD Scan II aberrometer/topograph in both eyes without contact lenses. Acuvue Oasys with HydraLuxe 1-Day (senofilcon A) daily disposable contact lenses were applied to the right eye, while Precision 1 (verofilcon A) daily disposable contact lenses were applied to the left eye based on refractive errors. Wavefront aberration measurements were repeated 60 min later with contact lenses, and aberrations were compared to baseline and fellow eyes' measurements. The magnitudes of aberration changes after contact lens application were analyzed. Results: Both types of daily disposable contact lenses reduced total wavefront aberrations. Acuvue Oasys with HydraLuxe 1-Day contact lenses showed a significant increase in total trefoil aberration (p = 0.048). Precision 1 contact lenses showed a significant increase (p = 0.034) only in total tilt aberrations compared to baseline. No significant differences were found between the lenses regarding changes in all wavefront aberrations. Conclusion: Both daily disposable lenses effectively reduced total wavefront aberrations, though they increased certain subtypes of high-order aberrations in young adult myopes. © 2025 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC license. http://creativecommons.org/licenses/by-nc/4.0/