摘要：Ammonia in air can be hazardous to human and animal life and should be
removed from the environment. Recently the removal of environmental pollutants
such as ammonia by means of natural and modified zeolites has attracted a lot of
attention and interests. In this study the capability of three Iranian natural
zeolites (Clinoptilolite) in point of view of removal of ammonia from air was
investigated. Through this research, different zeolites from various regions of
Iran including Semnan, Meyaneh, and Firoozkooh resources were considered to be
studied. These samples of zeolites were ground and granulized into 425 µm to 4
mm and were utilized in dynamic sorption experiments. Curves of sorption were
plotted and breakthrough and saturated points of zeolite samples were obtained.
The adsorption capacities at different ammonia concentrations, temperatures, and
flow – rates were also calculated. Results obtained showed that, the natural
Iranian zeolite (Clinoptilolite) was identified to be more efficient adsorbent
than the others to remove ammonia from the air. In the same conditions, the
obtained breakthrough time for clinoptilolite sample of Meyaneh was longer than
the others ( 135min ), while, the adsorption capacity of Semnan clinoptilolite
was higher than adsorbents ( 6.30 mg /g) (P<0.0001).
