資源描述:
《柚子皮基活性炭對(duì)水溶液中Cu(Ⅱ)吸附和機(jī)制研究.doc》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在工程資料-天天文庫。
1、doi:10.3969/j.issn.1007-7545.2019.12.016柚子皮基活性炭對(duì)水溶液中Cu(Ⅱ)的吸附及機(jī)制研究韓承輝1,謝偉芳1,阮小燕2,程婷1,戚琳1(1.江蘇開放大學(xué)環(huán)境與生態(tài)學(xué)院,南京210017;2.南京信息工程大學(xué),南京210044)摘要:為優(yōu)化柚子皮基對(duì)水溶液中Cu(II)去除條件及探究其吸附機(jī)制,采用SEM、XRD、FI-IR、N2吸附及熱重分析對(duì)合成的柚子皮基活性炭進(jìn)行表征,利用響應(yīng)面優(yōu)化柚子皮基活性炭?jī)?yōu)化吸附Cu(Ⅱ)條件,并采用動(dòng)力學(xué)及等溫吸附研究柚子皮基活性炭吸附
2、Cu(Ⅱ)的機(jī)制。結(jié)果顯示,柚子皮基活性炭經(jīng)MgCl2活化后,孔空隙結(jié)構(gòu)變得更加發(fā)達(dá)、體積和表面粗糙度明顯增加。合成的活性炭材料中有大量亂層狀石墨微晶、類石墨微晶結(jié)構(gòu),以及大量-OH、-C=C及-C-H等基團(tuán),吸附平均孔徑4.165nm,比表面積3.207m2/g。響應(yīng)面優(yōu)化后,柚子皮基活性炭吸附Cu(Ⅱ)的最佳工藝條件為:溫度20.04℃、初始pH=9、反應(yīng)時(shí)間40min、初始Cu(Ⅱ)濃度60mg/L,預(yù)測(cè)去除率為84.99%,實(shí)際去除率為84.14%。影響柚子皮基活性炭吸附Cu(Ⅱ)條件大小排序?yàn)椋撼?/p>
3、始pH>溫度>初始Cu(Ⅱ)濃度>反應(yīng)時(shí)間。柚子皮基活性炭吸附Cu(Ⅱ)符合準(zhǔn)二級(jí)動(dòng)力學(xué)及Langmuir等溫吸附模型。關(guān)鍵詞:柚子皮基活性炭;Cu(Ⅱ);響應(yīng)面;動(dòng)力學(xué);等溫吸附中圖分類號(hào):X703文獻(xiàn)標(biāo)志碼:A文章編號(hào):1007-7545(2019)12-0000-00StudyonAdsorptionCu(Ⅱ)fromAqueousSolutionswithPomeloPeel-BasedActivatedCarbonandItsAdsorptionMechanismHANCheng-hui1,XIE
4、Wei-fang1,RUANXian-yan2,CHENTing1,QILin1(1.SchoolofEnvironmentandEcology,JiangsuOpenUniversity,Nanjing210017,China;2.NanjingUniversityofInformationScienceandTechnology,Nanjing210044,China)Abstract:InordertostudytheoptimizationofCu(Ⅱ)adsorptionconditionswit
5、hpomelopeel-basedactivatedcarbonanditsadsorptionmechanism,synthesizedpomelopeel-basedactivatedcarbonwascharacterizedbySEM,XRD,FI-IR,N2adsorptionandthermogravimetricanalysis.ResponsesurfacemethodologywasusedtooptimizetheadsorptionconditionsofCu(Ⅱ),andadsorp
6、tionmechanismwasinvestigatedbykineticsandadsorptionisotherm.Theresultsshowthatporevolume,porestructureandsurfaceroughnessofpomelopeel-basedactivatedcarbonrisesignificantlyafterMgCl2activation.Largenumberofdisorderedlayeredgraphitemicrocrystalsandgraphite-l
7、ikemicrocrystalsexistinsynthesizedactivatedcarbonmaterials.Synthesizedpomelopeel-basedactivatedcarboncontainsalargenumberof-OH,-C=Cand-C-Hgroups.Theaverageporesizeandspecificsurfaceareaofpomelopeel-basedactivatedcarbonare4.165nmand3.207m2/grespectively.Aft
8、eroptimizationofresponsesurfacemethodology,theoptimumprocessconditionsforadsorptionofCu(Ⅱ)bypomelopeel-basedactivatedcarbonincludetemperatureof20.04℃,initialpHvalueof9,reactiontimeof40min,andinitialconcentrat