Identification of the radiolytic product of hydrophobic ionic liquid [C4mim][NTf2] during removal of Sr2+ from aqueous solution.

SO(3)(2-) is identified as one of the radiolytic products of the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C(4)mim][NTf(2)]) during the removal of strontium ions (Sr(2+)) from aqueous solution.

Adsorption and desorption of Sr(II) ions in the gels based on polysaccharide derivates.

Adsorption behavior of Sr(II) ions was investigated using gel adsorbents based on three types of polysaccharide derivates: carboxymethylated cellulose (CMC), carboxymethylated chitosan (CMCts) and hydroxypropyl methylcellulose phthalate (HPMCP). Maximum adsorption capacities were reached in about 0.5h for CMCts, 1h for CMC, and 2h for HPMCP.

Radiation effects on hydrophobic ionic liquid [C4mim][NTf2] during extraction of strontium ions.

The applications of room-temperature ionic liquids (RTILs) in separation of high level radioactive nuclides demand a comprehensive knowledge of the stability and metal ion extraction of RTILs under radiation. Herein, we assessed the influence of gamma-irradiation on the [C(4)mim][NTf(2)]-based extraction system, where [C(4)mim](+) is 1-butyl-3-methylimidazolium and [NTf(2)](-) is bis(trifluoromethylsulfonyl)imide, by solvent extraction of Sr(2+) using irradiated [C(4)mim][NTf(2)] in combination with dicyclohexyl-18-crown-6 (DCH18C6). It was found that the degree of extraction for Sr(2+) from water to irradiated [C(4)mim][NTf(2)] decreased compared with that to unirradiated [C(4)mim][NTf(2)], and the decrement enhanced obviously with increasing dose.

Adsorption of Cr(VI) using silica-based adsorbent prepared by radiation-induced grafting.

Silica-based adsorbent was prepared by radiation-induced grafting of dimethylaminoethyl methacrylate (DMAEMA) onto the silanized silica followed by a protonation process. The FTIR spectra and XPS analysis proved that DMAEMA was grafted successfully onto the silica surface. The resultant adsorbent manifested a high ion exchange capacity (IEC) of ca.

Influence of gamma-radiation on the ionic liquid [C4mim][PF6] during extraction of strontium ions.

The preliminary results presented here show that gamma-irradiation of ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([C4mim][PF6]) markedly decreases Sr2+ partitioning in the crown ether/[C4mim][PF6] extraction phase due to the competition between radiation-generated H+ and Sr2+ to interact with the crown ether, however, washing irradiated [C4mim][PF6] with water gives a simple way of recycling the ionic liquid.

Synthesis, size control and fluorescence studies of gold nanoparticles in carboxymethylated chitosan aqueous solutions.

A facile ultraviolet (UV) light irradiation method to synthesize gold nanoparticles (AuNPs) in the alkalic carboxymethylated chitosan (CM-chitosan) solution was first proposed in this paper. CM-chitosan, a water soluble polysaccharide derivative, served as both reducing agent for gold cations and stabilizing agent for AuNPs. The pH, the concentration of HAuCl(4) and irradiation time had obvious influence on the size, amount and morphology of AuNPs, which traced by UV-visible spectrometer and high resolution transmission electron microscopy.

Ion-specific swelling of poly(styrene sulfonic acid) hydrogel.

Poly(styrene sulfonic acid) (PSSA) hydrogel was prepared by radiation crosslinking using methyl N,N-bis-acrylamide as crosslinker. Effects of ion species and concentration on the swelling behavior of PSSA hydrogel were investigated in aqueous solution of selected anions (F-, Cl-, Br-, SCN-), cations (Li+, Na+, K+, Ca2+), and hydrophobic ions (tetramethylammonium cation TMA+, tetrabutylammonium cation TBA+, and dodecyltrimethylammonium cation TAB+). The deswelling extent of PSSA hydrogel follows anion Hofmeister series, i.