假二级反应模型在泥煤吸附Ni(Ⅱ)中的应用.pdf

维普资讯 第46卷 增 刊 中山大学学报 (自然科学版) Vo1．46 Sup． 2007年 6月 ACTA SCIENTIARUM NATURALIUM UNIVERSITATIS SUNYArrSENI Jun． 2o07 Pseudo—second—orderModelforSorption ofNickel(II)ontoPeat LIU Zhi’rong ，WEIPeng ，ZENGKai，ZHOU Li。rain (DepartmentofAppliedChemistry，EastChinaInstituteofTechnology，JiangxiFuzhou344000，China) Abstract：Peatcontainsmanyfunctionalgroups，suchasalcohols，aldehydes，acids，andphenolichydroxideswhichcanbeinvolved inchemicalbondingwithmetallicions．Theuseofpeatforremoval ofnickelfrom aqueoussolutionhasbeeninvestigatedatvariousa— queouspH valuesbymeansofliquidscintillationcounting．ThepresentresearchshowsthattheabilityofbindingNionpeatincreases withincrementofaqueouspH valuesandreachestheadsorptionequilibrium rapidly．A reasonablekineticmodel，pseudo—second— ordermodel，hasbeendevelopedandfittedofrsoprtionofnickel(II)ontopeat．Thepseudo—second—ordermodelprovidesahigh de~eeofcorrelationwiththeexperimentaldataofrthesoprtionofnickelontopeat． ’ Keywords：nickel-63；peat；soprtion；liquidscintillationcounting；pseudo—second—ordermodel CLCnumber：0647．33 Documentcode：A ArticleID：0529-6579 (2007)S1-0001-03 Peatisindeedacomplexmyriado±chemicalsys— AfterpHvalueofthesolutionwasadjustedto6．0，the tems．Becauseofthepolarcharacterofpeat，thead— solutionwasstoredin volumeconicalflask．The final sorption／exchangecapacityofpeatformetalionsispo— concentrationwas10000 g／mL and specificactivity tentiallyvery high．Batch experimentsusing peatofr was5I~Ci／mL．A1lsolutionusedinthisstudyweredi． theremoval ofnickelfrom wastewaterhavebeenstud． 1utedwithdistilledwaterasrequired． iedbySuH J…． LiquidScintilla