perconcentration of mercury (ii) from natural water by activated charcol -loaded schiff’s base 2-propylpiperidine-1-carbodithioate (ppcd) phases

Selective pre - concentration and solid phase extraction of mercury ( II ) from natural water by alumina - loaded ammonium pyrrolidine dithiocarbamate phases

Alumina phase loaded with ammonium pyrrolidine dithiocarbamate (APDC )were synthesized based on chemical binding and physical adsorption approaches. The stability of a chemically modified APDC especially in concentrated hydrochloric acid which was then used as a recycling and pre-concentration reagent for further uses of alumina immobilized APDC phase. The application of this alumina for sorpti...

Fabrication method of extracting Cadmium(II) and Lead(II) in water samples using Nano Graphene modified 2-propyl-piperidine-1-carbodithioate

A preconcentration/separation procedure is presented for the solid phase extractionof trace cadmium and lead ions as their 2-propylpiperidine-1-carbodithioate (PPCD) chelates inenvironmental samples on Nano Graphene, prior to cadmium and lead determinations by atomicabsorption spectrometry. The preconcentration procedure was optimized by using model solutionscontaining c...

Extraction and preconcentration of Pb(II) from water and soil samples using modified activated carbon

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....

Synthesis and Characterization of New Mercury (II) Complexes with Bidentate Chelating Schiff Base Iminopyridine Ligand

First, Schiff base iminopyridine ligands has been prepared by the condensation between primaryamines, different substituted anilines and active carbonyl group of pyridine carboxaldehyde, thenthe complexes [diiodo (3-ethylphenyl) pyridine-2-yl methylene amine] mercury(II), complex a,[dibromo (2,5-dimethylphenyl) pyridine-2-yl methylene amine] mercury(II) complex b, and[dinitrato bis-(2,6-dimethy...

Adsorption of Pb(II) by activated carbon prepared from Melia azedarach fruit: Equilibrium and thermodynamics

In this work, a low-cost activated carbon as well as non-hazardous material, with high adsorption capacity, was prepared from Melia azedarach fruit (MF) by ZnCl2 activation for the removal of Pb(II) toxic metal from aqueous solutions. The microstructure of the activated carbon was observed by Scanning Electron Microscopy (SEM). Batch experiments have been performed as a function of pH, contact ...

Adsorption of Cd(II) by Dried Activated Sludge