Kineti c Studies for Adsor ption of Azure B Dy e over Synthesized Fe-ZSM-۵ and Co-ZSM -۵ Nanoz eolites

Many industries such as textile and printing use dyes and pigment s and thus produce high ly colored waste effluents. Dispos al of these wastes into water cause s environmental proble ms [۱]. Various treatment proces ses such as physical separation, chemical oxidation and biologica l degradati on have been widely investigated to remove dyes from wastewater [ ۲]. Activate d carbon has been the most widely u sed adsorbent; it suffers drawbacks of higher co st in produ ction and re generation [۳]. Syntheti c and natural zeolites ar e important alternatives as adsorbents due to their high ion -exchange and adsorption capaciti es as well as thermal and mechani cal stabilities [۴]. Mo dified nanozeolite with cobalt and iron has some ion exchang eable cations such as C u۲+ and Fe۲+ in channels. Such cations give a high cation exchang e capability to zeolite, hence it can be exchang ed with org anic and inorganic cations such as A zure B dye [۵].

کلیدواژه ها:

Cu-ZSM -۵ ، Fe-ZSM -۵ nanozeolites ، Azure B ، Langmuir