an efficient separation-preconcentration procedure namely hollow fiber solid/liquid phase microextraction (hf-slpme) was developed for determination of trace amounts of palladium in water samples by differential pulse voltammetry. in this method, a hybrid sorbent utilizing functionalized nanoparticles incorporated in an organic solvent was used as the extractor phase. the nanoparticle dis­perse...

Abstract In this study, iron oxide nanoparticles (Fe 3 O 4 ) and with humic acid coatings /HA) were investigated for the removal of U(VI). The effect contact time, adsorbent mass, U(VI) concentration, pH was studied by batch technique. sorption kinetic data follows pseudo-second order, while isotherms obey Langmuir Q max values 238.0, 195.6 mg/g Fe /HA, respectively. According to decreases capa...

A novel nano-hybrid was synthesized through immobilization of amine-functionalized silica gel nanoparticles with nanomagnetite via a co-precipitation technique. The parameters, such as reagent concentrations, reaction temperature and time, were optimized to accomplish the nano-silica gel chelating matrix. The most proper amine-modified silica gel nanoparticles were immobilized with magnetic nan...

Abstract This work examines the influence of iron oxide nanoparticles (Fe 3 O 4 NPs) on neutron and gamma-ray radiation shielding characteristics Portland cement paste. Experimental evaluations were supplemented with theoretical studies using NXCom program. pastes 5, 10, 15, 20, 30 wt% nanomagnetite replacement produced. Moreover, rheological, early strength development, compressive strength, m...

Magnetite nanoparticles are not chemically stable at pH < 7, which drastically affects their environmental behavior.