Synthesis of a novel dithiooxamide–formaldehyde resin and its application to the adsorption and separation of silver ions

Selective separation and concentration of Pd(II) from Fe(III), Co(II), Ni(II), and Cu(II) ions using thiourea‐formaldehyde resin

“…The TUF resin used in the experimental studies was synthesized by well‐known amine‐formaldehyde reactions (Cannizzaro reaction), composed of hydroxymethylation and condensation steps 21–29. The synthesis of TUF resin may result in different chemical composition and physical properties according to initial mole ratio of thiourea to formaldehyde and drying conditions.…”

Removal of Cu2+and Ag+from aqueous solution on a chemically-carbonized sorbent from date palm leaflets

“…As the initial pH increases to pH 6, the initial concentration of hydrogen ions decreases, allowing an increase in uptake of both metals. pH values higher than 6 were avoided to prevent precipitation of Cu 2+ and Ag + as hydroxides [9,35]. In addition, pH zpc of the carbonaceous sorbent was found to be 2.75.…”

Sorbent extraction of 4-(2-thiazolylazo) resorcinol (TAR)–metal chelates on Diaion SP-850 adsorption resin in order to preconcentration/separation

“…The pH of the aqueous phase is one of the most important factors in a solid phase extraction procedure for the quantitative recoveries [51][52][53]. The influences of the pH on Fe(III), Cu(II), Ni(II) and Co(II)-TAR chelates on the sorption onto Diaion SP-850 resin was investigated over the range from 2.0 to 8.0 keeping other parameters constant.…”