1986 Volume 2 Issue 6 Pages 553-559
Inorganic phosphate in solution was concentrated on the Fe adsorbed cation exchange resin and its presence was determined by X-ray fluorescence spectrometry. The limit of detection was 6 ppb in the case of an enrichment factor of 4000. Chloride or sulfite ions did not affect this adsorption system, but the functional groups which did not contribute to Fe adsorption decreased the recovery of phosphate. The adsorption mechanism of phosphate was studied by analyzing the correlation between some chemical species, such as H+, OH-, K+ and PO43- in solution and the resin phase. The adsorption mechanism of phosphate was found to be ion exchange with anions on the Fe sites.