Group partitioning of minor actinides and rare earths from highly active liquid waste by extraction chromatography utilizing two macroporous silica-based impregnated polymeric composites

Chemical modification of Amberlite XAD-4 by carbonyl groups for phenol adsorption from wastewater

“…[20]. 10.0 g of the Amberlite XAD-4 was swollen by 80 mL of 1, 2-dichloroethane and 28.0 g of anhydrous ferric (III) chloride was added as the catalyst and then the reaction mixture was held in the refrigerator overnight. In an ice-water bath, 12 mL of benzoyl chloride was added drop-wise and then the reaction mixture was mechanically stirred for 8 h at this temperature, 2 h at 303 K and 1 h at 313 K. Finally, the reaction mixture was poured into a mixture solution of acetone and 1% of hydrochloric acid aqueous solution (v/v) and washed by ethanol and de-ionized water for three times, extracted by anhydrous ethanol for 8 h and dried under vacuum at 333 K for 8 h.…”

“…Since the pioneering reports of the early 1960s [5], various methods for preparation of the macroporous polymeric adsorbents have been extensively pursued [6,7]. Their pore structure can be easily regulated by adjusting the crosslinking reagents and porogens; their surface chemistry can be easily modified by using co-monomers with desired functional groups in copolymerization or by a subsequent particular chemical reaction of the synthesized polymer [8][9][10]. Moreover, the macroporous polymeric adsorbents can be easily regenerated by some typical solvents such as ethanol, acetone, dilute sodium hydroxide aqueous solution, dilute hydrochloric acid aqueous solution or by a relatively mild warming-up procedure [11][12][13].…”

Impregnation synthesis of a novel macroporous silica-based crown ether polymeric material modified by 1-dodecanol and its adsorption for strontium and some coexistent metals

“…The long-lived minor actinides such as Am(III) and Cm(III) were separated utilizing two columns packed with a macroporous silicabased octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) polymeric composite. In where, some preliminary investigations were carried out [26][27][28]. On the other hand, Sr(II), one of the heat generators, was partitioned through a novel macroporous silica-based DtBuCH18C6 or N,N,N ,N -tetraoctyl-3-oxapentane-1,5-diamide (TODGA) impregnated polymeric composite (DtBuCH18C6/SiO 2 -P or TODGA/SiO 2 -P) [29][30][31].…”

Preparation and chelation adsorption property of composite chelating material poly(amidoxime)/SiO2 towards heavy metal ions

“…For preparing these composite chelating materials, two methods can be adopted. One is coating or impregnating the inorganic particles with the solutions of chelating polymers [13][14][15], and this is a conventional and simple method; another method is to try to chemically bond the polymer with chelating function onto the surfaces of the inorganic particles (chemically anchoring or grafting) [16]. This method is more effective due to the combining stability of the polymers and inorganic particles, and should be developed vigorously.…”