Removal Performance for Nitrogen and Phosphate Using a Purification Material Consisted of Zeolitic Tuff and Waste Cement Slurry

Abstract

The purpose of this investigation is to evaluate performance of an appropriate composite material for a purification system of waste irrigation water. This material is consisted of a natural zeolitic tuff and waste cement slurry; the main component of the former is mordenite; the latter is covered over to make the fragile tuff strengthen. In this study, cyclic batch tests were conducted to reveal the removal performance for nitrogen and phosphate. As a result, the following conclusions are obtained;(1) the thickness of coating cement slurry that had no disadvantage for performance of removal of nitrogen and phosphate;(2) removal performance for ammonium was mainly contributed by ion absorption;(3) removal performance for phosphate was mainly contributed to absorption to microorganisms.