Waste building sludge (WBS) originating in the production of concrete prestressed poles (CSW) and technical stone (TSW) used original Fe-modified forms (CSWFe, TSWFe) was tested as an environmentally friendly cheap sorbent selected cations (Cd2+, Pb2+, Cs+) anions (AsO43?, PO43?, CrO42?) from water. The experiments were performed with 0.1 0.5 mmol·L?1 model solutions a batch manner at laborator...

The Gibbs energy changes for the reaction between copper, cadmium, and lead ions complexes with gallic acid clinoptilolite containing single-charged (Na, K) double-charged (Ca, Mg) exchange were calculated. software PRIRODA PBE/3ζ theoretical method has been used these calculations:
 (GalAn)2X×2H2O + Clin-Me 2H3O+ → X(H2O)n-Clin 2GalAn– (6-n)H2O 2Me+(Me2+).
 thermodynamic possibility ...

An intermittent on-line concentration and separation system coupled with HG-AFS was developed to eliminate serious interferences from Cu2+, Pb2+ and Zn2+ on the determination of cadmium. In the present method, the interferences from common coexisting ions, such as Cu2+, Pb2+, Zn2+, Fe3+ and Ni2+, were greatly reduced. Under the optimized conditions, a detection limit of 3 pg ml(-1) (3sigma, n=1...

The binding properties of metal ions to a pectic polysaccharide, rhamnogalacturonan II (RG-II), from plant cell walls were analyzed by size-exclusion HPLC/ICP-MS. The dimeric RG-II borate complex (dRG-II-B) from sugar beet and red wine contained 0.8 - 1.1 mol/mol of B, 0.8 - 1.1 mol/mol of Ca, 0.1 - 0.3 mol/mol of Sr, and 0.03 - 0.07 mol/mol of Ba. The treatment of dRG-II-B with Sr2+, Ba2+, Pb2...

Deposition and stripping of lead ions at thiol based disorganised monolayer modified gold piezoelectrodes was studied by cyclic voltammetry (CV) and electrochemical quartz crystal nanobalance (EQCN). Gold electrodes modified with 3-mercaptopropionic acid and 1,3-dimercapto propane sulphonic acid were studied. Due to the proximity of the potentials for the Pb deposition and thiol reductive desor...

This study used a thiolated calix[4]arene derivative modified on gold nanoparticles and screen-printed carbon electrode (TC4/AuNPs/SPCE) for Pb2+ Cu2+ determination. The surface of the was characterised via Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), cyclic voltammetry (CV), electrochemical impedance (EIS). Differential pulse (DPV) detect...

Uranium is one of the most common radioactive contaminants in the environment. As a major nuclear material in production, environmental samples (like soil and groundwater) can provide signatures on uranium production activity inside the facility. Thus, developing a new and portable analytical technology for uranium in aqueous media is significant not only for environmental monitoring, but also ...

mobile carrier properties of two schiff base ligands, named bis(2-hydroxypropiophenone)-1,2-propanediimine (n2o2) and bis(1'-hydroxy-2'-acetonaphthone)-2,2'-diiminodiethylamine (n3o2), dissolved in dichloromethane for the extraction of copper(ii) ions from an ammonium buffer feed phase into a nitric acid solution (receiving phase) were investigated and compared. the parameters influencing the t...

Electrokinetic is an effective method for the extraction of contaminants from low-permeable soils. This work examines influence Ca+2 ions on electroosmotic flow and effect electric potential, current, pH variations removal Pb2+, Na+, Cl? artificially contaminated soil during vertical electrokinetic experiments. The DC field 1 Vcm?1 was applied across specimen via steel mesh electrodes 24, 48, 7...