Development of a schiff base-chitosan-vanillin/hydroxyapatite composite for effective brilliant green dye removal: Characterization, adsorption modeling, and cost analysis

Article

作者: Abualhaija, Mahmoud ; Abdullah, Samaa ; Abdulhameed, Ahmed Saud ; Altamimi, Abeer A ; Algburi, Sameer

This work developed a Schiff base-chitosan-vanillin/hydroxyapatite (CHI-VAN/HA) composite from natural resources for effective brilliant green (BG) dye removal from aquatic systems. Physicochemical analysis of CHI-VAN/HA was performed via several methods, including BET, XRD, FTIR, and SEM-EDX. The mean pore diameter and total pore volume of CHI-VAN/HA were found to be 4.31 nm and 0.01994 cm³/g, respectively, while the BET surface area was found to be 18.49 m²/g. The CHI-VAN/HA composite mostly exhibits polycrystalline properties, as shown by its average crystallite size of 12.67 nm. Box-Behnken design (BBD) in response surface methodology (RSM) was used to optimize the impacts of the adsorption process parameters, namely the CHI-VAN/HA dosage (A: 0.02-0.08 g/L), pH (B: 4-10), and contact duration (C: 10-40 min). The adsorption process was described using the Freundlich isotherm and pseudo-first-order kinetic models. The thermodynamic analysis confirms that the adsorption process is both spontaneous (Gibbs free energy change, ΔG° = -6.832, -7.368, -7.904, and - 8.440 kJ/mol at 298, 308, 318, and 328 K respectively) and endothermic (enthalpy change, ΔH° = 9.156 kJ/mol), with increased interfacial disorder (entropy change, ΔS° = 0.0536 kJ/molK) facilitating the favorable uptake of BG dye onto the CHI-VAN/HA composite. The cost analysis for preparing 1 kg of CHI-VAN/HA adsorbent is approximately $215/kg. The CHI-VAN/HA composite exhibited a maximum adsorption capacity of 295.74 mg/g for BG dye. Several interactions, including electrostatic, π-π, n-π, H-bonding, and Lewis acid-base interaction, were identified as the mechanism for the BG dye adsorption. This work highlights that the developed Schiff base-chitosan-vanillin/hydroxyapatite composite, derived from natural sources, offers an eco-friendly and sustainable solution for brilliant green dye removal. Its excellent adsorption performance and physicochemical properties underscore its potential application in wastewater treatment and environmental remediation.

2025-04-25·WSEAS TRANSACTIONS ON BUSINESS AND ECONOMICS

The Moderating Effect of Financial Literacy on the Relationship between Financial Technology and Firms' Performance

作者: Alkarasneh, Huthaifa Mahmoud ; Bshayreh, Mohamed Mahmoud ; Qawqzeh, Hamza Kamel ; Qassim, Amal Abdulmajeed ; Al Dabbas, Yazeed Jamal

A strong understanding of financial issues makes it easier to make the most out of the different financial technology (FinTech) tools. Companies can make sure they get the most out of their investments by knowing how to utilize the FinTech's capabilities. Higher levels of the FL enable businesses to easily incorporate FinTech solutions into their current workflows, improving overall performance, cost savings, and efficiency. The main objective of this research is to investigate the moderating influence of the FL on the relationship of FinTech with firms' performance in the Jordanian context, as a representative market for the Middle East. Using 208 analyzed questionnaires obtained from the study’s sample in the listed Jordanian companies in the industrial sector, findings of the Structural-Equation-Modelling showed a significant and positive relationship between Fintech and with the performance of the firms. The findings also revealed that the FL moderates the relationship of FinTech with firms' performance in the Jordanian context. Businesses may invest in the training programs targeted FL for workers, senior managers, and decision-makers to boost their understanding of FinTech and enhance its impact on performance, where legislators could integrate FL requirements into the framework of governing by adopting accountable and knowledgeable FinTech through the numerous industries.

2025-04-16·WSEAS TRANSACTIONS ON MATHEMATICS

Fixed Point Theorem in MR-metric Spaces VIA Integral Type Contraction

作者: Malkawi, Abed Al-Rahman M.

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