Optimization of nitrate removal process from aqueous solution byClinoptilolite zeolite using surface response method

Nitrate is one of the most important pollutants in nature, which is considered a serious threatto human health and the quality of water resources. One of the methods to remove this pollutant isthe use of modified adsorbents such as oxide nanoparticles on clinoptilolite zeolite[۱]. In thisstudy, the samples were prepared synthetically at a concentration of ۱۰۰ mg/liter of nitrate. Theindependent variables included the amount of adsorbent in g/L, the percentage of copper oxideloaded, and pH. The performance of the process was evaluated based on the nitrate removalpercentage. Determining the number of tests, statistical analysis of laboratory data andoptimization of nitrate removal efficiency were done by using response surface method and centralcompound design. The results showed that pH, the percentage of copper oxide loaded, pH, thesquare of the percentage of copper oxide loaded were the most important parameters affectingnitrate removal by this method

Keywords:

Clinoptilolite zeolite , copper oxide nanoparticles , surface response method , centralcomposite design , optimization