Effects of pH and seawater on ability for phosphate adsorption on iron and steal slag coated with iron hydroxide

Abstract

ABSTRACT：In this study, the effects of pH and seawater were investigated for the ability for phosphate adsorption by column experiments. From the column experiment results, it was found that the ability for phosphate adsorption was mostly influenced by pH of solution. For the seawater, the effect of humic acid was suggested rather than that of other anion. The adsorbed amount of phosphate also decreased with increasing pH of solution. The removal rates decreased to the minimum value with experimental time and then minimum values were maintained for a long time. The more suitable pH value of solution was provided with the aeration method.