Publications by authors named "Rehab Khaled Mahmoud"

Article Synopsis
  • - The study examined how effectively benzalkonium chloride (BAC) can be removed using a system involving zero valent iron and persulfate (Fe/PS), focusing on how factors like persulfate concentration, iron dosage, and pH influence the process.
  • - At an optimal iron dosage of 5.0 mM and PS to BAC ratio of 10:1, BAC degradation reached about 91.7% efficiency in 60 minutes at pH 7.0, with minimal interference from common inorganic substances, suggesting the system's potential for treating wastewater.
  • - Various degradation pathways were identified, involving reactions like dealkylation and hydroxylation, with 23 intermediates discovered through advanced testing;
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In this investigation, we conducted a detailed analysis of the oxidation of 16 imidazole ionic liquid variants by Fe(VI) under uniform experimental setups, thereby securing a dataset of second-order reaction rate constants (k). This methodology ensures superior data consistency and comparability over traditional methods that amalgamate disparate data from varied studies. Utilizing 16 chemical structural parameters obtained via Density Functional Theory (DFT) as descriptors, we developed a Quantitative Structure Activity Relationship (QSAR) model.

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Soil contamination of polycyclic aromatic hydrocarbons (PAHs), especially caused by the mixture of two or more PAHs, raised great environmental concerns. However, research on the migration and transformation processes of PAHs in soils and their interactions with native communities is limited. In this work, soil samples from uncontaminated sites around the industrial parks in Handan, Hengshui, and Shanghai were artificially supplemented with three concentrations of anthracene (Ant), 9-chloroanthracene (9-ClAnt), benzopyrene (BaP), and chrysene (Chr).

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Chitosan has received broad consideration as an adsorbent for all pollutants because of its low cost and great adsorption potential. However, its shortcomings, including sensitivity to pH, poor thermal stability, and poor mechanical strength, limit its use. The functional groups of chitosan can be modified to enhance its performance by the grafting technique and Schiff base modification.

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Pharmaceuticals are detected at trace levels in water. Their adverse effects on human health and aquatic ecosystems required novel pharmaceutical remediation methods for treating wastewater effluents. Layer double hydroxide (LDH) is abundantly available by simple preparation methods and with low costs.

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