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Previously, the production of high-purity water with regeneration performance better than that of conventional resins was proposed and applied using an amphoteric resin called quaternary ammonium-sulfonic acid resin (QA-SAR), which behaved as medium-strength acid resin.
Despite having superior regeneration performance than conventional resins, QA-ion-exchange SAR’s capacity and conductivity further contributed to the material’s poor effluent and high regeneration voltage.
In light of this, sulfonic acid-quaternary ammonium resin (SA-QAR), a novel amphoteric resin that behaves as a medium-strength basic resin and contains more anionic than cationic groups, was proposed here.
It outperformed both conventional resins and QA-SAR in terms of regeneration and purification performance. The MFEDI system’s effluent quality remained steady and lower under the same circumstances.
The Global Novel Amphoteric Ion Exchange Resins market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
By radiation-induced grafting styrene (St) and dimethylaminoethyl methacrylate (DMAEMA) onto the poly (vinylidene fluoride) resin, followed by sulfonation and protonation procedures, a novel amphoteric ion exchange resin was created.
Micro-FTIR, XPS, TG, and SEM tests provided evidence that the poly (St-co-DMAEMA) grafts’ grafting and sulfonation of St and DMAEMA units had been carried out successfully and according to plan.
While the composition of the graft chains only relied on the initial molar ratio of St and DMAEMA, the grafting circumstances, such as the solvent, total absorbed dose, and monomer concentration, had a significant impact on the grafting yield (GY).
The maximal cation and anion exchange capacities can finally reach to 2.16 mmol/g and 1.06 mmol/g, respectively, as the ion exchange capacities (IEC) grow with the increase of GY. This type of new ion exchange resin can be used in treatment of heavy metal waste water and as ion exchange membrane material.
