background: there are great resources of natural zeolite in iran. zeolite, an inorganic ion-exchanger, may be used as a suitable technical-economical solution for water treatment in many regions of iran. in this study, the characterization of natural zeolite natrolite and the feasibility of removing hardness, cations, and anions were investigated. methods: first, zeolite composition and type we...

The hydration structure in aqueous solutions of three tetraalkylammonium halides (TAAX), tetramethylammonium chloride (TMACl), tetrapropylammonium bromide (TPABr), and tetrabutylammonium bromide (TBABr) at concentrations of 2.2, 1.4, and 1.0 m, respectively, is studied via molecular dynamics (MD) simulation at ambient conditions. The results are compared directly with neutron diffraction with i...

In situ synthesis of magnetite particles has been carried out in a preorganized polyvinyl alcohol (PVA) gel by varying the total number of iron ions in an environment of a fixed number of hydroxyl functional groups of PVA. A systematic change in the morphology and patterning of the magnetite particles on the polymer surface revealed the effect of the total number of cations on the conformation ...

the complexive abilities of 5,11,17-tddert-butyl-23 amino-25.26,27,28-tet3propoxy-calix[4]arere and5,1127-tri-amino-23 acelyktert-butylamide-25,26,27,28-tetrabutoxy-calixplarene towards alkali metalions lit nat, kt ric and cs+ in methanol-chloroform mixture have been evaluated at 25 °c, using uvvis spectrophotometric techniques. the results showed that the hgands are capable to complex with all...

Different physiochemical parameters such as color, odour, taste, pH, Electrical conductivity, total dissolved solids, concentration of cations & anions were determined in the waste water samples that were collected in the vicinity of Kuala Lumpur city. Peel of Citrus reticulata (orange), Punica granatum (pomegranate), Daucus carota (carrot) and Momordica charantia (bitter gourd) were used to st...

An understanding of the interaction mechanisms between exchangeable cations and layered silicates is of interest from both a basic and an applied point of view. Among 2:1 phyllosilicates, a new family of swelling high-charge synthetic micas has been shown to be potentially useful as decontaminant. However, the location of the interlayer cations, their acidity and the water structure in the inte...

the effects of industrial textile water(effluent water,ew) on soil, water and plant was investigated in this research. for conducting this research major important textile factory were selected and sampling was done in 2 stages and in 2 years. in each district and the control field (soil not irrigation with effluent water) the soils from 0-30 cm depth and plants were sampled in three replicates...

Metal cations are ubiquitous components in biological environments and play an important role in regulating cellular functions and membrane properties. By applying metadynamics simulations, we have performed systematic free energy calculations of Na(+), K(+), Ca(2+), and Mg(2+) bound to phospholipid membrane surfaces for the first time. The free energy landscapes unveil specific binding behavio...