A spectroscopic investigation of the complexes formed between the Pb(II) ion and D-penicillamine (H2Pen), a chelating agent used in the treatment of lead poisoning, was carried out on two sets of alkaline aqueous solutions with CPb(II) ≈ 10 and 100 mM, varying the H2Pen/Pb(II) molar ratio (2.0, 3.0, 4.0, 10.0). Ultraviolet-visible (UV-vis) spectra of the 10 mM Pb(II) solutions consistently show...

A novel polymeric sorbent has been synthesized by graft copolymerization of crosslinked polyvinyl alcohol with malic acid, and characterized by FTIR, TGA and swelling studies. A suitable and interesting method has been developed for the extraction and separation of lead ion with the graft copolymer. The lead ion uptake capacity of the polymer has been evaluated vis-a-vis varying pH and metal io...

The ability of sheep wool to remove Pb(II) ions and safranin dye from aqueous solutions through the adsorption process was investigated at room temperature. The metal ions concentration was determined by flame atomic absorption spectrophotometer method. The influence of pH, contact time, amount of adsorbent, temperature and initial metal...

The adsorption performance and mechanism of extracellular polymeric substances (EPS) extracted from Klebsiella sp. J1 for soluble Pb (II) were investigated. The maximum biosorption capacity of EPS for Pb (II) was found to be 99.5 mg g(-1) at pH 6.0 and EPS concentration of 0.2 g/L. The data for adsorption process satisfactorily fitted to both Langmuir isotherm and pseudo-second order kinetic mo...

In the title coordination polymer, [Pb(C(5)H(9)NO(2)S)](n) {systematic name: catena-poly[(μ-2-amino-3-methyl-3-sulfido-butano-ato)lead(II)]}, the d-penicillaminate ligand coordin-ates to the metal ion in an N,S,O-tridentate mode. The S atom acts as a bridge to two neighbouring Pb(II) ions, thereby forming a double thiol-ate chain. Moreover, the coordinating carboxyl-ate O atom forms bridges to ...

Pb(II) is a representative heavy metal in industrial wastewater, which may frequently cause serious hazard to living organisms. In this study, comparative studies between alginate nanoparticles (AN) and quercetin-decorated alginate nanoparticles (Q-AN) were investigated for Pb(II) ion adsorption. Characterization of AN and Q-AN were analysed by transmission electron microscopy (TEM), Fourier tr...

In the crystal of the title polymeric compound, {[Pb(C(7)H(5)O(3))(2)(C(6)H(6)N(2)O)]·H(2)O}(n), the Pb(II) ion is chelated by two carboxyl-ate groups of 3-hy-droxy-benzoate (HB) anions, and coordinated by one isonicotinamide mol-ecule; a carboxyl-ate O atom and a hy-droxy O atom from adjacent HB anions bridge the Pb(II) ion to form polymeric chains along [100], in which the Pb(II) ion is in an...

The title compound, [Pb(2)Zn(2)(C(22)H(18)N(2)O(4))(2)Cl(4)]·2C(3)H(7)NO, was synthesized using a step-by-step method and has a slipped sandwich configuration. The coordination environment of the Zn(2+) ion is distorted square-pyramidal and it is coordinated by N(2)O(2) of the Schiff base ligand and chloride; each Pb(2+) ion is coordinated by the four 6,6'-dimeth-oxy-2,2'-[o-phenyl-ene-bis(nitr...

This work examined the removal of Pb(II) using a chitosan derivative (SB, synthesized from benzaldehyde) assisted by a magnetic field. The adsorption capacity for Pb(II) was investigated. It was found that 1) the pH and concentration of the ion solution, as well as exposure time and strength of magnetic field, affected the degree of adsorption; and 2) studies of the adsorption isotherms and kin...