Factors Affecting Ammonia Removal by Clinoptilolite

by James R. McLaren, Water Quality Ofcr.; Northern Economic Development, Yellowknife, NT, Canada,
Grahame J. Farquhar, Assoc. Prof.; Dept. of Civ. Engrg., Univ. of Waterloo, Waterloo, ON, Canada,

Serial Information: Journal of the Environmental Engineering Division, 1973, Vol. 99, Issue 4, Pg. 429-446

Document Type: Journal Paper


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.

Subject Headings: Flow rates | Ammonia | Temperature effects | Flow measurement | Ion exchange | Columns | Quality control | Volume measurement

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