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1、第28卷第8期环境科学学报Vol.28,No.82008年8月ActaScientiaeCircumstantiaeAug.,2008李日强,李松桧,王江迪.2008.沸石的活化及其对水中氨氮的吸附[J].环境科学学报,28(8):1618-1624LiRQ,LiSH,WangJD.2008.Zeoliteactivationandammonia2nitrogenremovalfromwastewaterbyadsorptiononactivatedzeolite[J].ActaScientiaeCircumstantiae,28(8):1618-1624沸石的活化及其对水中氨氮的吸
2、附1,321李日强,李松桧,王江迪1.山西大学环境与资源学院,太原0300062.山西大学黄土高原研究所,太原030006收稿日期:2007207231修回日期:2007211211录用日期:2008205226摘要:对天然沸石进行了盐活化、盐加酸活化、盐加碱活化、热活化和热活化后加盐二次活化的处理,分别考察了活化后沸石对氨氮的吸附性-1能,并进行了等温吸附、解吸试验以及对经SBR2氧化处理后焦化废水的吸附试验.结果表明,沸石在100℃下经0.3mol·LNaCl活化后,对-1氨氮的吸附效果最佳;当活化沸石投加量为10g·L、接触时间为40min时,氨氮去除率可达88.08%,比未活
3、化条件下的47.35%提高了40173%.沸石投加量、废水的pH和接触时间对活化沸石吸附氨氮都存在一定的影响.活化沸石对氨氮废水的吸附等温线可用Freundlich方程-1拟合.吸附氨氮后的沸石经1.5mo·lL的NaCl溶液再生4h,解吸率可达到89.30%.活化沸石用于经SBR2氧化处理后焦化废水的吸附试验,-1-1-1当活化沸石投加量为120g·L时,其氨氮可从219.18mg·L降到4.8mg·L,去除率达到97.81%;活化沸石吸附焦化废水的吸附等温线可用Freundlich方程和Langmuir方程来描述.关键词:沸石;活化沸石;吸附;氨氮;焦化废水文章编号:025322
4、468(2008)0821618207中图分类号:X703文献标识码:AZeoliteactivationandammonia2nitrogenremovalfromwastewaterbyadsorptiononactivatedzeolite1,321LIRiqiang,LISonghui,WANGJiangdi1.SchoolofEnvironmentandResources,ShanxiUniversity,Taiyuan0300062.InstituteofLoessPlateau,ShanxiUniversity,Taiyuan030006Received31July20
5、07;receivedinrevisedform11November2007;accepted26May2008Abstract:Theammonia2nitrogenadsorptioncapacityofnaturalzeolitewasevaluatedafteractivationbysalt,saltplusacid,saltplusalkali,heat,andheatactivationfollowedbysaltmodification.Theadsorptionanddesorptionisothermswereexamined.Theactivatedzeolit
6、ewasalsousedtoadsorb+ammonia2nitrogenfromcoal2cokingwastewaterpretreatedbySBR2oxidation.TheresultsshowthattheremovalofNH42Nbyactivatedzeolitewasthe-1-1+highestafteractivationin0.3mo·lLNaClsolutionat100℃.Whenthezeolitedosagewas10g·Landthecontacttimewas40min,theNH42Nremovalratereached88.08%,40.73
7、%higherthanthat(47.35%)ofnon2activatedzeolite.Theremovalrateisdependentonzeolitedosage,wastewaterpHandcontacttime.Theadsorptionisothermcurveofammonia2nitrogenonsalt2activatedzeolitewaswelldescribedbytheFreundlich-1function.Afterth
