資源描述:
《改性木屑對(duì)水中剛果紅的吸附性能研究》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在教育資源-天天文庫。
1、第34卷第7期2014年7月環(huán)境科學(xué)學(xué)報(bào)ActaScientiaeCircumstantiaeVol.34,No.7Jul.,2014DOI:10.13671/j.hjkxxb.2014.0510吳艷,羅漢金,王侯.2014.改性木屑對(duì)水中剛果紅的吸附性能研究[J].環(huán)境科學(xué)學(xué)報(bào),34(7):1680-1688WuY,LuoHJ,WangH.2014.Adsorptionpropertiesofmodifiedsawdustforcongeredremovalfromwastewater[J].ActaScientiaeCircumstantiae,34(7):1680-1
2、688改性木屑對(duì)水中剛果紅的吸附性能研究吳艷1,2,羅漢金1,2,*,王侯31.華南理工大學(xué)環(huán)境與能源學(xué)院,廣州5100062.工業(yè)聚集區(qū)污染控制與生態(tài)修復(fù)教育部重點(diǎn)實(shí)驗(yàn)室,廣州5100063.湖南大學(xué)環(huán)境科學(xué)與工程學(xué)院,長(zhǎng)沙410082收稿日期:2013-09-26修回日期:2013-11-04錄用日期:2013-11-06摘要:對(duì)十六烷基三甲基溴化銨(CTAB)改性木屑用于水中剛果紅(CR)的去除進(jìn)行了研究.用掃描電子顯微鏡(SEM)和傅里葉紅外光譜分析儀(FTIR)對(duì)木屑和改性木屑的性能進(jìn)行表征.探討了反應(yīng)時(shí)間、pH、溫度、劑量以及離子強(qiáng)度對(duì)改性木屑去除CR的影響.實(shí)驗(yàn)結(jié)
3、果表明,CTAB改性后的木屑對(duì)剛果紅的吸附量明顯增大,改性前后木屑的最大吸附量分別為30.30和111.36mg·g-1.反應(yīng)過程在前20min內(nèi)反應(yīng)速率很快,并約在120min內(nèi)達(dá)到吸附平衡.吸附動(dòng)力學(xué)符合偽二級(jí)動(dòng)力學(xué)模型.最佳反應(yīng)溫度為328K,吸附劑最適投加量為0.09g,吸附量的大小與溶液的初始pH值有關(guān),且增加鹽濃度,改性木屑的吸附能力增加.吸附等溫線符合Langmuir方程,且吸附過程為吸熱反應(yīng).關(guān)鍵詞:木屑;吸附;剛果紅;表面活性劑文章編號(hào):0253-2468(2014)07-1680-09中圖分類號(hào):X703.1文獻(xiàn)標(biāo)識(shí)碼:AAdsorptionproperti
4、esofmodifiedsawdustforcongeredremovalfromwastewaterWUYan1,2,LUOHanjin1,2,*,WANGHou31.CollegeofEnvironmentandEnergy,SouthChinaUniversityofTechnology,Guangzhou5100062.TheKeyLaboratoryofPollutionControlandEcosystemRestorationinIndustryClustersofMinistryofEducation,Guangzhou5100063.CollegeofEnvi
5、ronmentalScienceandEngineering,HunanUniversity,Changsha410082Received26September2013;receivedinrevisedform4November2013;accepted6November2013Abstract:Inthisstudy,cetyltrimethylammoniumbromide(CTAB)-modifiedsawdustwasappliedtoremovecongered(CR)fromaqueoussolutions.Thecharacteristicsofsawdusta
6、ndmodifiedsawdustwerecharacterizedbyFouriertransforminfraredspectrum(FTIR)andscanningelectronmicroscopy(SEM).Theeffectoffactors,includingpH,contacttime,temperature,dosage,andsaltconcentration,ontheadsorptionpropertiesofCRbymodifiedsawdustwereinvestigated.TheresultsrevealedthattheadditionofCT
7、ABinpreparationcansignificantlyincreasetheadsorptioncapacityofCR.ThemaximumadsorptioncapacityofCRonsawdustandmodifiedsawdustinferredfromtheLangmuirmodelwas30.30and111.36mg·g-1at328K,respectively.Theadsorptionprocesseswererapidwithinthefirst20minand