环境工程专业毕业论文：改性粉煤灰吸附稀土氨氮废水的实验研究

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1、内蒙古科技大学本科生毕业论文题目：改性粉煤灰吸附稀土氨氮废水的试验研究学生姓名：王妮学号：0707117104专业：环境工程班级：环境07-1班指导教师：陈莉荣副教授内蒙古科技大学本科生毕业论文改性粉煤灰吸附稀土氨氮废水的试验研究摘要我国稀土产业迅猛发展造成了严重的环境污染，而粉煤灰微孔较小，比表面积大，具有良好的吸附性能和离子交换性能。为了进一步能提高吸附特性，使其较好的运用到废水的处理中，因此，本文利用改性粉煤灰来吸附处理稀土氨氮废水，从而达到以废治废的目的。本试验以包头某稀土厂排放的稀土氨氮废水为试验水样，以酸改性、酸-碱改性的粉煤灰为吸附剂进行了氨氮静态单因素吸附试验

2、与正交吸附试验研究。结果表明：当酸改性粉煤灰处理稀土氨氮废水时，最佳单因素为：投加量为2.0g/50ml时，吸附时间在4h，pH为12时，其最大去除率为52.3%；酸-碱改性粉煤灰的正交试验中各因素对粉煤灰吸附氨氮的影响顺序依次为：吸附时间>溶液pH>酸-碱改性粉煤灰投加量；酸-碱改性粉煤灰极差趋势图结果表明：投加量为2.5g/50ml，pH为8，吸附时间为2.5h，此条件下对氨氮的去除率达到66.4%。关键词：粉煤灰；改性；稀土氨氮废水；吸附I内蒙古科技大学本科生毕业论文TheTestingStudyoftheadsorptionofammonianitrogenwaste

3、waterwithmodifiedflyashAbstractTherapiddevelopmentofChina'srareearthindustryhascausedseriousenvironmentalpollution,flyashporousissmallerandthesurfaceareaislarger,andhasagoodadsorptionandionexchangeproperties.Tofurtherimprovetheadsorptioncharacteristicsandmakebetteruseofthewastewatertreatmen

4、t,therefore,inthepapermodifiedflyashbemadeusetoabsorbammoniawastewaterofrareearth,soastoachievethepurposeofwastetreatwaste.Inthisstudy,toammonianitrogenwastewaterdischargedbytheBaotouRareEarthfactoriesastestingsamples,toacid-modified,acid-alkali-modifiedflyashasadsorbent,hasastudyfortheadso

5、rptionofammonianitrogenstaticsingle-factorandorthogonalassaytest.Theresultsshowthatwhendealingwithrareacid-modifiedflyashammonianitrogenwastewater,thebestsinglefactor:thedosageof2.0g/50ml,theadsorptiontimeis4h,pH=12,themaximumremovalrateis52.3%.Theimpactorderofvariousfactorsonadsorptionofam

6、monianitrogeninacid-alkalimodifiedflyashorthogonalassaytestisthattime>pH>dosage,theresultsofacid-alkali-modifiedflyashrangetrendsshowthatthedosageof2.5g/50ml,pH=8,theadsorptiontimeis2.5h,theammoniaremovalratereached66.4%onthiscondition.Keywords:Flyash;Modification;Rareearthammonianitrogenwa

7、stewater;AdsorptionII内蒙古科技大学本科生毕业论文目录摘要..................................................................................................................................IAbstract............................................................................