background: heavy metals have been recognized as harmful environmental pollutant known to produce highly toxic effects on different organs and systems of both humans and animals. the aim of this paper is to evaluate the adsorption potential of chitosan for the removal of pb(ii), fe(ii) and cu(ii) ions from aqueous solutions. methods: this study was conducted in laboratory scale. in this paper c...

Chemically modified electrodes (CMEs) based on polymeric films of E-5-((5-isopropyl-3,8-dimethylazulen-1-yl) diazenyl)-1H-tetrazole (L) deposited the surface glassy carbon electrode have been used for recognition heavy metal (Me) ions. The electrochemical study L was done by three methods: differential pulse voltammetry (DPV), cyclic (CV), and rotating disk (RDE). CV, DPV, RDE studies were perf...

Proton and Cu(II), Zn(II), Cd(II) and Pb(II) binding by ligand H(2)L, containing two bis(aminoethyl)amine (dien) units connected by a 2',7'-dichlorofluorescein (DCF) unit has been analyzed by means of potentiometric, UV-vis and fluorescence emission measurements. Considering proton binding, the ligand in its fully deprotonated form, L(2-), binds up to four acidic protons in the alkaline pH regi...

in this work, a new extractant was prepared by immobilizing ligand 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol, (5-br-padap), on the activated carbon and applied to extraction of pb(ii) prior to determination by flame atomic absorption spectrometry. it was confirmed by ft- ir analysis. the metal ion was retained on the 0.05 g of the sorbent in the ph range 6-8, and then eluted with 5 ml of 0....

Heavy metal pollution in water, particularly Pb ion pollution, has seriously threatened human life and health. Therefore, the manufacture of efficient sensitive heavy detection materials is essential. The objective this study was to improve electrochemical performance laser-induced graphene (LIG) for Pb(II). Considering excellent affinity high activity transition metals, Ni-Fe alloy coatings we...

Hyperbranched polyesters, based on 2,2-bis(hydroxymethyl)propionic acid as an ABx monomer and triethanol amine as a core molecule were synthesized and characterized with C{H} NMR spectroscopy and size exclusion chromatography. The sorption behavior of the hyperbranched polyester systems containing the oxygen ligating sites towards ions such as Cu(II), Co(II), Ni(II), Cd(II), Zn(II), Pb(II) and ...

In this paper, the performance of nanofiltration membrane process in removing Pb(II) from aqueous solution was modeled by the pore flow-concentration polarization model. The model was fabricated based on the simultaneous resolving of Extended Nernst–Planck equation(ENP), film theory, and osmotic pressure model. The effects of various operational parameters such as the applied pressure, feed con...

In this work, a new extractant was prepared by immobilizing ligand 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol, (5-Br-PADAP), on the activated carbon and applied to extraction of Pb(II) prior to determination by flame atomic absorption spectrometry. It was confirmed by FT- IR analysis. The metal ion was retained on the 0.05 g of the sorbent in the pH range 6-8, and then eluted with 5 mL of 0....

This work deals with geopolymers based on local Jordanian resources, namely, kaolin and zeoltitic (phillipsite) tuff. The geopolymers were prepared from these two materials by a reaction with an alkali solution at 80oC. The research group of the present work has demonstrated in previous work that addition of zeolitic tuff to kaolin based-geopolymers increases the adsorption capacity toward Cu(I...