Readily prepared polystyrene-bound pyridine-2,6-dicarboxylate and its application for removal of mercury ions

Abstract

Commercially available chloromethylated polystyrene (cross-linked with 2% divinylbenzene) was used to prepare novel and stable polymer supported pyridine-2,6-dicarboxylate. This polymer was found to accelerate the selective removal of Hg(II) from aqueous solutions containing different amounts of Hg(II) (10-100 ppm). Adsorption rate was high at the beginning and then equilibrium was reached in about 25 min. Maximum Hg(II) adsorption capacity of the resin was about 41.5 mg/g of the dry polymer. The Hg(II) adsorption ability increased with the increase in pH, in the range where the solubility of the Hg(II) was not affected by pH. More than 95% of the adsorbed Hg(II) was desorbed in 15 min by using 0.1 M HNO 3 as an elution agent. The regeneration of this resin by strong acid was feasible and desorption ratio was very high (up to 96%).

Selective Removal of Silver Impurity from Oxaliplatin by Sorption on Functionalized Polymer

“…The intermediate salt gets converted to its free base form on treatment with a metal carbonate. The grafting of the functional group was confirmed through the disappearance of the characteristics bands for CMPS (CH 2 –Cl stretching , 674 cm –1 , and CH 2wagging , 1264 cm –1 ) and appearance of a new band at 1630–1631 cm –1 due to CN of S-substituted isothiourea group as shown in Figure . ,, The sulfur content obtained from the elemental analysis further supported the functionalization of the polymer beads (Table ).…”

“…32 The intermediate salt gets converted to its free base form on treatment with a metal carbonate. [16][17]33 The sulphur content obtained from the elemental analysis further supported the functionalization of the polymer beads (Table 1). [16][17]33 The sulphur content obtained from the elemental analysis further supported the functionalization of the polymer beads (Table 1).…”

New Cellulose–Lysine Schiff-Base-Based Sensor–Adsorbent for Mercury Ions

“…The ion removal study was carried out on the above synthesized Schiff bases using 0.01 g of polymer in 10.0 mL of Hg­(II) solution (100 ppm). After specific time intervals (10–180 min), solution aliquots were withdrawn and the concentration of the remaining ions was determined at 560 nm with a Photolab 6600 UV–vis spectrophotometer using Michler’s thioketone (TMK) reagent to evaluate the best performing adsorbent and equilibrium adsorption time for further adsorption experiments . In view of the higher efficiency of C 10 –O–cell–HCN–Lys than the other adsorbents, it was selected for the optimization of various adsorption parameters, such as the temperature, pH, and initial concentration of ion solutions.…”

“…After specific time intervals (10−180 min), solution aliquots were withdrawn and the concentration of the remaining ions was determined at 560 nm with a Photolab 6600 UV− vis spectrophotometer using Michler's thioketone (TMK) reagent to evaluate the best performing adsorbent and equilibrium adsorption time for further adsorption experiments. 35 In view of the higher efficiency of C 10 −O−cell−HCN−Lys than the other adsorbents, it was selected for the optimization of various adsorption parameters, such as the temperature, pH, and initial concentration of ion solutions. The effects of the temperature (20−60 °C), pH (2.0−8.0), and initial Hg(II) ion concentration (10−200 ppm) were studied at the optimized time.…”

Polyvinyl alcohol/polysaccharide hydrogel graft materials for arsenic and heavy metal removal

“…Consequently, chelating functionalized polymeric materials have been used with notable interests as adsorbents of heavy metals and arsenic pollutants. [23][24][25] In addition, notable works can also be cited, where heavy-metal ions such as Hg, Pb, Ag and Cu were removed from water using different chelating resins. [26][27][28] Although the use of some hydrogels for treating wastewater has been found in literature, the systematic use of a series of polysaccharides with PVA hydrogels along with a different route of development is still rarely reported.…”