改性粉煤灰吸附F-和Hg2+的研究.pdf

1、華北電力大學(xué)碩士論文摘要摘要本文使用ca(oH)2改性的粉煤灰吸附溶液中F一和Hg2，確定了影響粉煤灰吸附F和Hg2的主要因素，研究了改性前后粉煤灰吸附F一和Hg2的能力變化以及吸附動力學(xué)、熱力學(xué)規(guī)律，并考察了改性前后粉煤灰同時吸附F和Hg2的熱力學(xué)規(guī)律，最后結(jié)合文獻(xiàn)分析了改性前后粉煤灰吸附F一和Hg2的機(jī)理。研究表明，擬二級動力學(xué)方程和Langmuir方程能夠很好地描述改性前后粉煤灰吸附F一和Hg2的動力學(xué)和熱力學(xué)特性改性后粉煤灰對F

2、一和Hg2的吸附能力較改性前均有提高F一的存在有助于改性前后粉煤灰對Hg2的吸附改性前后粉煤灰可以同時吸附F一和Hg2。關(guān)鍵詞:改性粉煤灰，氟離子，汞離子，吸附ABSTRACTCa(OH):wasusedtomodifytheflyash，theobjeetivesofthisPaPerweretoconfirmthemaininnuenceraetorsorr‘a(chǎn)ndHgZadso印tiononthenyash，tevealthead

3、sorptioneaPacity，kinetieandthermodynamieeharaeteristies，andtoinvestigatethethermodynamielaworeo一adso甲tionorF一andHgZonthenyashbereandanerthemodifieationtreatments.Finally，theadsorptionmeehanismwasdiseussedcombiningwithlit

4、eratures.TheresultsshowedthatthedynamieandthermodynamieeharaeteristiesorF一andHgZadso甲tiononthenyashcou一dbeadequatelydeseribedbythePseudo一seeondrateequationandLangmuirequation:themaximumadsorPtionofF一andHgZonthenyashincre

5、asedanerthetreatmentbyea(oH)2:F一contributedmetoabso印tionorHgZonthenyashandmodi6ednyash:andit15possiblethatF一andHgZeanbeeo一adsorPedontheflyashandmodifiedflyash.MaZhuo(Thermalengineering)DireetedbyProf.LIYuKEvwoRDs:modined

6、nyash，F(xiàn)一，1192，adsorption3.2.3影響改性粉煤灰吸附F一因素的確定...................................................................……253.2.4改性粉煤灰用量對吸附F一的影響........................................................................……253.2.5F一溶

7、液初始濃度對吸附F一的影響.........................................................................……263、3改性前后粉煤灰吸附F一的動力學(xué)特征.....................................................................……273.4改性前后粉煤灰吸附F一的熱力學(xué)特征......……，........

8、....................................……，‘.....……283.5小結(jié)…，............................................................................................................……，..............……，二29第四章粉煤灰改性前后吸附Hg2的規(guī)律...............

9、..............................................……314.1影響粉煤灰吸附Hg2的因素...........................................................................................……314.1.1影響粉煤灰吸附H擴(kuò)十因素的確定.......................................

10、...............................……314.1.2粉煤灰用量對吸附Hg2的影響......……，..........................................................……324.1.3H擴(kuò)十初始濃度對粉煤灰吸附Hg2的影響..........................................……犯4.2影響改性粉煤灰吸附Hg2的因素........

11、..........................................................……‘......……334:21Hg2吸附改性劑的選擇.........................……，.....................................……，二，....……334.2.2影響改性粉煤灰吸附Hg2因素的確定..................................

12、............................……344.2.3改性粉煤灰用量對吸附Hg2的影響...............................................................……354.2.4H廣初始濃度cH獷對吸附Hg2的影響.......................................一，~...……，一354.3改性前后粉煤灰吸附Hg2的動力學(xué)特征.....

13、.................................................……，..…，.…364.4改性前后粉煤灰吸附Hg2的熱力學(xué)特征.......................……，..................................……384.5小結(jié).............................................……，....................……

14、，..................……，........……，.................……39第五章粉煤灰改性前后同時吸附F一和HgZ的規(guī)律..............................................……405.IH廣對改性前后粉煤灰吸附F一的影響..........……，...........……405.2F一對改性前后粉煤灰吸附Hg2的影響........................

15、.........……，..................................……415.3改險前后粉煤灰同時吸附F一和H擴(kuò)的規(guī)律……，.，.…，一，...............................................……415.4小結(jié)..................................................................................

16、...........................................……，....……43第六章粉煤灰吸附F一和Hg2的機(jī)理分析..............................................................……456.1粉煤灰吸附F一的機(jī)理分析..................................................................

17、............................……456.2粉煤灰吸附Hg2的機(jī)理分析........................................................................................……46第七章結(jié)論及建議........................................................................

18、.......................……477.1結(jié)論.................................……，.........................................................................……，.................……477.2建議.................................……，..............

19、...................................................................................……47參考文獻(xiàn)................................................................................................................……49致謝...........