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It is imperative to eliminate heavy metals and pharmaceutical residual pollutants from wastewater to reduce their detrimental effects on the environment. In this work, natural zeolite and a 2-amino terephthalic acid-based multi-metallic organic framework were used to create a new composite that can be utilized as an adsorbent for cadmium and safinamide. The adsorption study was examined in a variety of settings (pH, adsorbent dosage, pollutant concentration, and time). Moreover, Zeta potential, BET, SEM, FTIR, XRD, and SEM measurements were used to characterize the adsorbents. The adsorption process was confirmed using FTIR, XRD, and SEM analysis. Various nonlinear adsorption isotherm models were applied to adsorption results. The results showed a significantly better adsorption ability for safinamide and cadmium using zeolite/MOF compared to zeolite. Adsorption kinetics were represented by five models: pseudo first-order, pseudo second-order, intraparticle diffusion, mixed first- and second-order, and the Avrami model. Regarding both adsorbent substances, safinamide adsorption was best represented by the intraparticle diffusion model. In contrast, the pseudo second-order and intraparticle diffusion models for zeolite and zeolite/MOF, respectively, better fit the experimental results in the case of cadmium adsorption. The thermodynamic parameters ΔH°, ΔS°, and ΔG° were investigated through temperature tests carried out at 25, 35, 45, and 55 °C. Exothermic and spontaneous adsorption processes were demonstrated by the computed values. The study of adsorbent regeneration involved the use of several chemical solvents. The DMSO solvent was shown to have the highest adsorbent regeneration method efficiency at 63%. Safinamide elimination was lessened by organic interfering species like cefixime and humic acid compared to inorganic species like chloride, sulphate, and nitrate, most likely as a result of intense competition for the few available active sites. Using zeolite/MOF nanocomposite, the percentage of safinamide removed from spiked real water samples (tap water, Nile River water, and groundwater samples) was 48.80%, 64.30%, and 44.44%, respectively. Based on cytotoxicity results, the highest percentages of cell viability for zeolite and zeolite/MOF at 24 h were 83% and 81%, respectively, in comparison to untreated controls. According to these results, zeolite and zeolite/MOF composites can be used as effective adsorbents for these pollutants in wastewater. [ABSTRACT FROM AUTHOR]

The study aims to evaluate the electronic periodicals available on the Internet in the field of information and libraries in the Arab world by displaying samples of these periodicals. (6) Arab scientific periodicals in this field have been studied in terms of their conformity with the standards of the Ulrich Universal Directory for Periodicals. The study adopted a survey approach to answer the research questions raised by the study, and the study reached a set of results, the most important of which is that the Arab electronic periodicals in the field of libraries and information, the sample of the study, are completely consistent with the application of the standards of Ullrich Periodicals Directory with regard to (title, publisher and editor in chief, ISSN, country, Language, alternate form),In addition, the most electronic periodicals of the sample that comply with the standards of the Ulrich Directory are the journal of (Researches in Information Science and Libraries), followed by the (International Journal of Library and Information Sciences), and the least sample periodicals that conform to the standards of Ulrich Directory are (The Iraqi Journal of Information Studies and Documentation). The most important suggestion of the study is the need to pay attention to the electronic periodicals available on the Internet by the publishers or the authorities responsible for issuing them, so that each journal has its own independent site through which a direct access is provided to articles that they have prepared without entering implicit links indirectly to access the journal's website and then search for its articles which requires additional time and effort. [ABSTRACT FROM AUTHOR]

In this work, the removal of a model antibiotic named 'doxycycline' by three‐layered double hydroxides (LDHs) such as Mg–Fe LDH, Mg–Al LDH and Mg–Al/MWCNT LDH was investigated. Almost full characterisation of the prepared LDHs before and after adsorption was conducted using X‐ray diffraction, Fourier‐transform infrared spectroscopy, zeta potential, Brunauer–Emmett–Teller used for detecting the surface area, high‐resolution transmission electron microscope (HRTEM) and field emission scanning electron microscope. The effect of different factors on doxycycline adsorption capacity was investigated. The removal percentages of doxycycline were 80, 82 and 92% by Mg–Fe LDH, Mg–Al LDH and Mg–Al/MWCNT LDH, respectively. These results were attributed to the difference in the pore volume and geometry between the different LDHs. The isothermal and kinetic models of adsorption were also studied. The kinetics of adsorption were described by the second‐order equation with a better fit showed by a high R2 value. Mathematically, the Langmuir and Freundlich models best fitted the equilibrium data. [ABSTRACT FROM AUTHOR]