Synthesis and characterization of Ag-oxide pillar /composite clay mineral used as adsorbent

Abstract

The purpose of our study is the evaluation clay extracted from western Algeria's land. The experimental study consists to designate the optimal activation conditions (concentration: 3 M at temperature T = 70 ° C, activation time = 4h, adsorbed H2SO4 = 1.45 meq / g clay, CEC = 52 meq/100 g clay) to obtain an adequate activated bentonite which is ready for pillaring operation. Modified clay was characterized by different techniques XRD, XRF and physico-chemical analysis (cation exchange capacity; CEC, specific surface area; SBET). Silver pillared material was synthesized from activated bentonite at 3 M/T=70°C using the AgNO3 solution as pillaring agent. Silver pillar clay was characterized by physicochemical analysis (XRD, CEC, surface acidity, specific surface area, average pore diameter and density). The basal spacing for the intercalated bentonites with silver pillar is respectively in 39.5 A° and 37 A°. The specific surfaces of silver pillared clay and natural bentonite are respectively in 370 and 65 m2 g-1 order. These fundamental results are very important in the development of the new adsorbent.