Selective Ion Exchange Resins Research Articles

Resacetophenoneoxime‐formaldehyde resins, IV. Chelation ion‐exchange properties

AbstractResacetophenoneoxime‐formaldehyde resins showed to be selective chelating ion exchange resins for certain metal ions. A batch equilibrium method was used in the study of the selectivity of metal ion uptake. The method involved the measurement of distribution of a given metal ion between an aqueous solution and the resin. The study was carried out over a wide pH range and in media of various ionic strengths.

Factors Affecting Ammonia Removal by Clinoptilolite

The effect of ammonium ion concentration, flow rate, and temperature on ammonium ion removal from solution by the selective ion exchange resin, clinoptilolite, were investigated. Columns were operated at flow rates of 26.67 and 13.33 bed volumes per hour (BV/hr), ammonium ion concentrations of 70 mg per L as N and 14 mg per L as N and temperatures of 12° C and 2° C. Performance was measured as ammonia capacity and liquid volume treated to breakthrough. Initial ammonium ion concentration has the greatest influence on the capacity of clinoptilolite. Excellent agreement between observed ammonia capacities and those predicted from a theoretical equilibrium model suggested that the model could provide preliminary assessments of wastewater treatment with clinoptilolite. The initial ammonium ion concentration had a significant effect on the volume of liquid treated to breakthrough. Flow rate and temperature did not.

水質汚濁における有害金属の除外 : 特に両性イオン交換樹脂による水銀の吸着について(水質汚濁と廃棄物処理)

水質汚濁における有害金属の除外 : 特に両性イオン交換樹脂による水銀の吸着について(水質汚濁と廃棄物処理)

Selective ion-exchange resin based on resacetophenonoxime. I. Preparation of the resin and its basic characterization

Selective ion-exchange resin based on resacetophenonoxime. I. Preparation of the resin and its basic characterization

Ion exchange resins

A gold complex and/or silver complex selective ion exchange resin comprising a polyurethane matrix having an amine functionality and processes for recovery of gold and/or silver from solutions using the above ion exchange resin.