An-Najah Blogs :: Dr. Ibrahim Abu-shqair An-Najah Blogs :: Dr. Ibrahim Abu-shqair en-us Fri, 05 Jun 2020 23:38:45 IDT Fri, 05 Jun 2020 23:38:45 IDT REMOVAL OF ZINC FROM AQUEOUS SOLUTIONS BY DRY PLANT LEAVES ArticlesRemoval of zinc from aqueous solutions by 15 species of plant leaves was studied The maximum efficiency of removal was found to be by walnut and poplar leaves at pH 6 with a maximum removal of 82 Increasing the concentration of plant leaves increased the removal of zinc up to a limit Agitation of solution increased the efficiency of the removal process The presence of competing and complexing agents affected the removal process negatively but also positively in few casesRemoval of Dissolved Copper From Polluted Water Using Plant Leaves: I. Effects of Acidity and Plant Species ArticlesRemoval of copper from polluted water by plant leaves was studied using 15 species Copper was recovered in variable percentages depending on the species and pH value of the solution Copper recovery from a 20 mgL copper solution ranged between 88 in poplar leaves and 33 in oak leaves For all leaves studied maximum copper recoveries were found to be between pH 4 and 6 depending on the plant species At pH 2 the copper was not removed by the plant leaves studied Adsorption was suggested as the main mechanism for the reaction between copper ions and plant leaves with a reaction order equal to oneSynthesis of Swellable Tris (2-aminoethyl) amine Functionalized Polymer Microspheres and Study of their Optical Sensing Properties Going ResearchesIbrahim Abu-Shqair Ziad Shakhsher and Hanin Qasem An optical chemical sensor based on polymer swelling and shrinking will be studied by way of optical transmission Tris 2-aminoethyl amine-polymer will be synthesized The sensing Polymer will be formed from poly vinylbenzylchloride Tris 2-aminoethyl amine by a nucleophilic substitution reaction followed by base hydrolysis This polymer is expected to show interesting response to pH changes as well as selectivity for different heavy metal cations The sensing element will be produced by dispersing the Tris 2-aminoethyl amine-polymer beads and entrapping them as microspheres in a hydrogel membrane formed by cross linking poly vinylalcohol with gluteraldehyde The entrapping of the microspheres in the hydrogel aims to generate a sensing element that will be attached to the end of fiber optics to form a fiber optic sensor that will be used in real-life sample analysis