Bipolar ion-exchange resins based on functional acidic tetrazolium groups — their synthesis, structure and properties

New sequential treatment for mature landfill leachate by cationic/anionic and anionic/cationic processes: Optimization and comparative study

“…The results indicated that a high recovery efficiency of cation and anion exchangers can be obtained by regeneration. According to Grote and Schumacher [43], in most cases, the ion exchangers can be reused many times in cyclic operations. Thus, the regeneration and ruse of the resin is often cost-effective.…”

Syntheses, Characterization, and Hg(II) Adsorption Properties of Porous Cross-Linked Polystyrene Modified with 2-Aminopyridine via a Sulfoxide/Sulfone-Containing Spacer Arm

“…4 In the past decade, many efforts have been devoted to find the chelating resins to remove mercury from aqueous media. [11][12][13][14][15][16][17][18] Recently, we have designed and synthesized a series of novel chelating resins containing sulfur and nitrogen atoms. Their adsorption properties for metal ions were investigated systematically.…”

“…In the past decade, many efforts have been devoted to find the chelating resins to remove mercury from aqueous media. − Recently, we have designed and synthesized a series of novel chelating resins containing sulfur and nitrogen atoms. Their adsorption properties for metal ions were investigated systematically. − In our previous study, an interesting phenomenon was found that the sulfide bond in the chelating resins can be easily oxidized into sulfoxide or sulfone by certain oxidizing metal ions such as mercury(II) and gold(III). , The further study revealed that the oxide (sulfoxide or sulfone) chealting resins exhibited better adsorption selectivity than its counterpart sulfide chelating resin .…”

Preparation, characterization, and adsorption properties for metal ions of a novel chelating resin containing sulfoxide and diethylene glycol

“…Chelating resins containing sulfur are highly efficient in the selective adsorption of precious metal ions. 2,3 Many attempts have been made to design new chelating resins containing sulfur atoms, such as thiol, 4-6 thiourea, 7,8 , dithiazone, 9,10 and 2-mercaptobenzothiazole. 11 Recently, chelating resins bearing sulfoxide groups have been utilized in separating noble metal, 12,13 poisonous mercury, 14 rare earth, 15 and radioactive element uranium 16 from aqueous solution.…”