“…A large number of studies has been carried out on the characterization of the ion-exchanged bentonites (Adams, 1987;Komadel et al, 1990;Cases et al, 1997;Rutherford et al, 1997;Lee et al, 1999;Xu et al, 2000;Jozefaciuk & Bowanko, 2002;Yıldız & Çalımlı, 2002;Neaman et al, 2003;Huang et al, 2004;Volzone & Ortiga, 2004;Çaglar et al, 2009). Information is scarce, however, about the adsorption of ethylene (Choundry et al, 2002;Park et al, 2002;Cho et al, 2005;Saini et al, 2011;Erdogȃn Alver & Sakızcı, 2012;Youngjan, 2012;Erdogȃn Alver et al, 2016) and hydrogen (Gil et al, 2007(Gil et al, , 2009Didier, 2012;Bardelli et al, 2014;Edge, 2015;Mondelli et al, 2015) by clay and clay-based materials. Furthermore, very few publications are available in the literature that discuss the ethylene and hydrogen adsorption properties of K, Na-, Li-, Ag-and Mgmodified bentonites from Turkey.…”