Adsorption of lanthanides and scandium ions by silica sol-gel material doped with novel bifunctional ionic liquid, trioctylmethylammonium 1-phenyl-3-methyl-4-benzoyl-5-onate

Kinetics of scandium ion sorption onto oxidized carbon nanotubes

“…For example, Ma et al [12] evaluated the sorption rate of 0.0528 g mg −1 min −1 for Sc(III) on lysinefunctionalized mesoporous material (initial metal concentration 20 mg dm −3 , adsorbent dose = 0.25 g dm −3 ) and the value of 0.00101 g mg −1 min −1 was reported for CNTs modified with activated carbon [18]. On the other hand, Turanov et al [13] reported the kinetic sorption rate for Sc(III) on silica doped with trioctylmethylammonium 1-phenyl-3-methyl-4-benzoyl-5-onate ionic liquid equals to 8.64 g mg −1 min −1 (initial concentration of 1.35 mg dm −3 , V/m = 5 g dm −3 ). However, for that sorbent, very low (0.27 mg g −1 ) sorption capacity was obtained [13].…”

“…On the other hand, Turanov et al [13] reported the kinetic sorption rate for Sc(III) on silica doped with trioctylmethylammonium 1-phenyl-3-methyl-4-benzoyl-5-onate ionic liquid equals to 8.64 g mg −1 min −1 (initial concentration of 1.35 mg dm −3 , V/m = 5 g dm −3 ). However, for that sorbent, very low (0.27 mg g −1 ) sorption capacity was obtained [13]. Furthermore, intra-particle diffusion model was used to investigate the contribution of various steps involved in the adsorption process such as intraparticle and film diffusions.…”

“…The broad range of sorbent materials along with the various chelating reagents make solid-phase extraction technique very attractive for sample pretreatment. Various chelating reagents immobilized on silica or polymeric supports, such as 1-(2-pyridylazo)-2-naphtol and acetylacetone [9,10], glycol amic acid [11], lysine [12], and bifunctional ionic liquid trioctylmethylammonium 1-phenyl-3-methyl-4-benzoyl-5-onate [13], have been recently reported for the enrichment of scandium. However, some silica materials are not stable and they lose the efficiency towards Sc(III) after the desorption step, so the additional regeneration step is needed for their reusability [13,14].…”

“…Various chelating reagents immobilized on silica or polymeric supports, such as 1-(2-pyridylazo)-2-naphtol and acetylacetone [9,10], glycol amic acid [11], lysine [12], and bifunctional ionic liquid trioctylmethylammonium 1-phenyl-3-methyl-4-benzoyl-5-onate [13], have been recently reported for the enrichment of scandium. However, some silica materials are not stable and they lose the efficiency towards Sc(III) after the desorption step, so the additional regeneration step is needed for their reusability [13,14]. The chelating resins containing iminodiacetate functional groups exhibit also affinity for alkali and alkaline earth elements, thus the additional washing step with the excess of buffer is required to remove the matrix components [15].…”

Mono and co-immobilization of imidazolium ionic liquids on silica: effects of the substituted groups on the adsorption behavior of 2,4-dinitrophenol

“…The reported adsorbents include carbons activated by KOH, HNO 3 H 3 PO 4 and ZnCl 2 , 17 olive wood biosorbents, 18 UiO-66-NH 2 , 19 glycidyl methacrylate graed cotton cellulose, 20 yellow bentonite, 21 XAD-4 resin, 22 activated carbon bers, 23 layered double hydroxides and their calcined products, 24 carbon nanospheres, 25 date seeds 26 and active carbon. 27 In recent years, ionic liquid-modied silicas (IL-silicas) as adsorbents have been widely used to remove Cu(II), Fe(III), Mn (II) and Ni(II), 28 Pb(II), [29][30][31] Cr(III,VI), [32][33][34] lanthanides and scandium ions, 35 oxymatrine, 36 bovine serum albumin, 37 racemic amino acids, 28 thiophenic sulfur compounds, 38 anionic dye, 39,40 dibenzothiophene 41 and phenolic compounds (4-chlorophenol, 42 polyphenols, 43 phenolic acids, 44 naphthols, 45 bisphenol A 46 and 2,4-DNP [47][48][49] ). To elucidate the relation between the structure of IL-silicas and their adsorption performance for phenolic compounds, a series of IL-silicas were designed by varying substituents, the functional groups of the imidazolium ring, counter ions and silane-coupling agents.…”