NaCl改性沸石对氨氮吸附性能研究.pdfVIP

32 10 20 10 10 * NaCl 改性沸石对氨氮吸附性能的研究 # 孙同喜 郑萌璐 蒋轶锋 陈建孟 陈 浚 (, 310032) NaCl , NaCl , , NaCl 6%( ) 303 15 g( 100 mL NaCl ) , ( SEM) ( BET) , , , 2 LangmuirFreundlich , 303 , 34%, , , Eff ect of NaCl modification on ammonia- nitrogen adsorption property of zeolite S UN Tongx i , ZH EN G M eng lu, JIA N G Yif eng , CH EN J ianmeng , CH E N J un. ( Col lege of Biolog ical and En ironmental Eng ineer ing , Zhej iang Uni ersity of T echnology , H angz hou Zhej iang 310032) Abstract: Natural zeolite was modified by NaCl solution and the effects of NaCl concentration,temperature and zeolite dosage on modification were studied.In addition,ammonia-nitrogen adsorption properties of natural and NaCl modified zeolite were compared through surface characteristics analysis, static adsorption and dynamical experiments. When 15 g of zeolite was modified in 100 mL of NaCl solution ( mass ratio was 6%) at 303 , the obtained zeolite presented the best ammonia-nitrogen adsorption property.SEM and BET analysis showed that the modified zeolite had rougher surface, smaller average adsorption pore size and larger specific surface area compared with natural zeolite. The adsorption of ammonia-nitrogen on two kinds of zeolite could bewell fitted by both Langmuir and Freundlich iso- therms equation,and NaCl modification could increase the theoretical maximum adsorption capacities ( q ) by 34% or m more. The intra- particle diffusion was the limiting factor for ammonia-nitrogen adsorption. The dynamic a