Özmen, Elif YılmazSirit, AbdülkadirYılmaz, Mustafa2020-03-262020-03-2620071060-1325https://dx.doi.org/10.1080/10601320601031333https://hdl.handle.net/20.500.12395/21162Two insoluble beta-cyclodextrin polymers were synthesized by reacting beta-cyclodextrin with hexamethylene diisocyanate ( HMDI) or 4,4'methylene bis phenyldiisocyanate (MPDI) as a crosslinking agent and a calix[4]arene-based oligomer was prepared by the condensation of p-tert-butylcalix[4] arene with HMDI and utilized to remove selected water-soluble azo dyes from aqueous solution. Oligomer 2 was found to be a poor sorbent for the azo dyes. The influence of several parameters ( pH, contact time, and NaCl concentration) on the sorption capacity was evaluated using the batch and recycling column methods. The proposed sorption mechanism involved several kinds of interactions: physical adsorption, hydrogen bonding and formation of an inclusion complex due to the beta-CD molecules through host-guest interactions.en10.1080/10601320601031333info:eu-repo/semantics/closedAccessbeta-cyclodextrincalix[4]arene oligomerazo dyehexamethylene diisocyanateArticle442167173Q2WOS:000243542100007Q3