Experimental Modeling of 4-Chloro-2-Nitrophenol Adsorption Onto Kaolin Using Response Surface Methodology

This research was studied the efficiency of kaolin and modified kaolin with cetyltrimethylammonium bromide and tetrabutilammonium iodide surfactants as adsorbents in the adsorption of 4-chloro-2-nitro phenol. Batch adsorption studies were carried out to study the effect of important parameters using response surface methodology (RSM). Results showed that the modification of kaolin with cetyltrimethylammonium bromide was enhanced the removal efficiency (>50%). As results, increasing of adsorbents amount in acidic media due to increase of 4-chloro-2-nitro phenol removal. Evaluation of the interplay of variables showed that interaction between initial concentration-pH and adsorbent amount-pH have the most influence on the adsorption onto kaolin, and also interaction between adsorbent amount-contact time and adsorbent amount-pH have the most influence on the adsorption of 4-chloro-2-nitro phenol onto modified kaolin with cetyltrimethylammonium bromide and tetrabutilammonium iodide, respectively.