Optimization of ammonia removal by natural zeolite from aqueous solution using response surface methodology

Abstract

Ammonium removal from aqueous solution was investigated using natural zeolite. Operating variables were optimized by statistical design for this process. Eight variables including pH, contact time, dose and size of adsorbent, initial ammonia concentration, temperature, agitation and concentration of other adsorbate were screened by Placket-Burman design. The results indicated particle size, contact time, dose of zeolite and initial ammonia concentration are effective on removal efficiency with p-value