BACKGROUND The natural polyether ionophorous antibiotics are used for the treatment of coccidiosis in poultry and ruminants. They are effective agents against infections caused by Gram-positive microorganisms. On the other hand, it was found that some of these compounds selectively bind lead(II) ions in in vivo experiments, despite so far no Pb(II)-containing compounds of defined composition ha...

Metal detoxification of waste water and industrial effluents are of increasing importance to industrialization in the twenty first century. The ability of coconut (cocos nucifera L) coir dust (CD), carbohydrate toluenediisocyanate resin (CTR) and sulphonated toluenediisocyanate resin (STR) to remove Pb(II) ions from aqueous solution by ion exchange was studied. Percentage ion exchange efficienc...

In this study, aqueous solutions containing mixtures of heavy metals namely Zn (II), Pb (II), Cr (III), and Cr (VI) were treated by polymer-enhanced ultrafiltration (PEUF) using unmodified starch as binding biopolymer. The performance of starch in removing these heavy metals was compared with that of polyethylene glycol (PEG) a commonly used polymer in PEUF processes. Rejection coefficients and...

The removal of heavy metals, especially from wastewater, has attracted significant interest because of their toxicity, tendency to bioaccumulate, and the threat they pose to human life and the environment. Many low-cost sorbents have been investigated for their biosorption capacity toward heavy metals. However, there are no reports available on the removal of Pb(II) from aqueous solution by of ...

Two different extremophilic films were used as natural biosorbents to remove Cu(II), Ni(II), and Pb(II) from aqueous solutions. Surface area, scanning electron microscopy imaging, Fourier transformation infrared spectroscopy characterize the surfaces of biosorbents. The results indicated high affinity Pb(II), with adsorption rates ranging 73.6 100% for both succeed in removing metal ions mixtur...

The ion-exchange behavior of an organomineral material with imidazolium (1-methyl-3-(prop-2-yn-1-yl)-1H-imidazol-3-ium bromide)-modified silica gel was studied for the extraction Ag(I) from nitric acid media. multicomponent systems containing Fe(III), Co(II), Ni(II), Cu(II), Pb(II), and Mn(II) in 100- 1000-fold molar excesses respect to shown occur high selectivity. Based on data X-ray diffract...

No. Conr0232 Planar Oxides as a Novel Approach to Understanding Metal Ion Sorption to Natural Oxide Surfaces: An EXAFS Investigation of Pb(II) Sorption to Gamma Alumina Surfaces M. Kelley (College of William & Mary/TJNAF), C. Chisholm-Brause (W&M), C. Conrad (W&M) Beamline(s): X11A Introduction: This work introduces planar oxides as a novel approach to understanding metal-ion interactions with ...

The toxicity of metal ions on ecosystems has led to increasing amounts research their removal from wastewater. This paper presents the efficient application a carbon magnetic nanocomposite as an adsorbent for elimination (copper, lead and zinc) aqueous solutions. A Box–Behnken factorial design combined with response surface methodology was conducted investigate effect interactions three variabl...

Cross-linked metal-imprinted chitosan microparticles were prepared from chitosan, using four metals (Cu(II), Zn(II), Ni(II), and Pb(II)) as templates, and epichlorohydrin as the cross-linker. The microparticles were characterized by Fourier transform infrared spectroscopy, solid state (13)C nuclear magnetic resonance spectroscopy, and energy-dispersive X-ray spectroscopy. They were used for com...