بررسي كاربرد زيوليت كلينوپتي لولايت منطقه سمنان در حذف ازت آمونياكي از آبهاي آلوده

Investigation about the Semnan Clinoptilolite Zeolites Application for Ammonia - Nitrogen Removal from Polluted Waters

Nitrogen compounds are one of the several materials in the wastewaters and effluents that have harmful effects in water resources. In different experiences , Ion Exchange (IE) with Zeolites were used for removal of Ammonia-nitrogen. The aim of this research was studying the application of Semnanʹs Zeolite for removal of Ammonium in both Batch and Continous systems . The Zeolite Clinoptilolite was supplied by Semnan area mines . The Zeolite was ground and sieves based on U.S. standard mesh number 20 , 30 , 40 and then conditioned by Ammonium Sulfate and Sodium Chloride solutions respectively . The test results on conditioned samples in Batch system was showed that average Ion Exchange capacity for particles with 20 , 30 and 40 mesh were between 6.65 - 16 mg NH4+ / g Zeolite weight . Forthermore its selectivity for other cations obtained the ranking of K , NH4, ,Na , Ca , Mg respectivly . In Continous system , total cation exchange and till breakthrough point capacity obtain 16.31 - 19.5 and 7.61 - 11.23 mg NH4+ / g Zeolite weight . The resultes indicated that high level of regeneration (95 - 98%) may be achieved with solution of NaCl . At present time, the most wastewater treatment plant in our country designed for removal of organic matter and Ammonium remain in effluent , and the use of Ion Exchange with Clinoptilolite can be led to economical remove of NH4 + from effluent .