资源描述:
《柚子皮基活性炭对水溶液中Cu(Ⅱ)吸附和机制研究.doc》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、doi:10.3969/j.issn.1007-7545.2019.12.016柚子皮基活性炭对水溶液中Cu(Ⅱ)的吸附及机制研究韩承辉1,谢伟芳1,阮小燕2,程婷1,戚琳1(1.江苏开放大学环境与生态学院,南京210017;2.南京信息工程大学,南京210044)摘要:为优化柚子皮基对水溶液中Cu(II)去除条件及探究其吸附机制,采用SEM、XRD、FI-IR、N2吸附及热重分析对合成的柚子皮基活性炭进行表征,利用响应面优化柚子皮基活性炭优化吸附Cu(Ⅱ)条件,并采用动力学及等温吸附研究柚子皮基活性炭吸附
2、Cu(Ⅱ)的机制。结果显示,柚子皮基活性炭经MgCl2活化后,孔空隙结构变得更加发达、体积和表面粗糙度明显增加。合成的活性炭材料中有大量乱层状石墨微晶、类石墨微晶结构,以及大量-OH、-C=C及-C-H等基团,吸附平均孔径4.165nm,比表面积3.207m2/g。响应面优化后,柚子皮基活性炭吸附Cu(Ⅱ)的最佳工艺条件为:温度20.04℃、初始pH=9、反应时间40min、初始Cu(Ⅱ)浓度60mg/L,预测去除率为84.99%,实际去除率为84.14%。影响柚子皮基活性炭吸附Cu(Ⅱ)条件大小排序为:初
3、始pH>温度>初始Cu(Ⅱ)浓度>反应时间。柚子皮基活性炭吸附Cu(Ⅱ)符合准二级动力学及Langmuir等温吸附模型。关键词:柚子皮基活性炭;Cu(Ⅱ);响应面;动力学;等温吸附中图分类号:X703文献标志码:A文章编号: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