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1、第26卷第8期化學(xué)研究與應(yīng)用V01.26.No.82014年8月ChemicalResearchandApplicationAug.,2014文章編號(hào):1004—1656(2014)08-1272-05Ce/Zr/A1類水滑石的合成、表征及其吸附性能研究丘秀珍,盧文貫,陳慧琴(韶關(guān)學(xué)院化學(xué)與環(huán)境工程學(xué)院,廣東韶關(guān)512005)摘要:本研究對(duì)Ce/Zr/A1三元類水滑石材料去除微囊藻毒素(MC)的潛在應(yīng)用進(jìn)行了探索。采用共沉淀法合成了碳酸根型Ce/Zr/A1三元類水滑石,通過XRD、IR等手段對(duì)樣品進(jìn)行了測(cè)試和表征。合成的類水滑石用于吸附MC,并詳細(xì)研究了其對(duì)MC的吸附性能。結(jié)果顯
2、示,控制反應(yīng)條件為溫度80~C,M“/M’摩爾投料比為1:l,pH為8.5,合成的Ce/Zr/A1三元類水滑石對(duì)MC具有較高的吸附性能,對(duì)微囊藻毒素LR(MC.LR)最大吸附量可達(dá)178~g/g,對(duì)MC—LR和微囊藻毒素RR(MC.RR)的吸附效率均大于70%,吸附性能明顯高于硅膠等常用吸附劑。這些研究數(shù)據(jù)表明Ce/Zr/A1三元類水滑石對(duì)去除水體中微囊藻毒素具有潛在的應(yīng)用價(jià)值。關(guān)鍵詞:Ce/Zr/A1水滑石;合成及表征;微囊藻毒素(Mc);吸附性能中圖分類號(hào):0614.33+2文獻(xiàn)標(biāo)志碼:ASynthesis,characterization,absorptionperform
3、anceofCe/Zr/AIhydrotalcite-likecompoundsQIUXiu—zhen,LUWen—guan,CHENHui—qin(CollegeofChemistryandEnvironmentalEngineering,ShaoguanUniversity,Shaoguan512005,China)Abstract:ThepresentstudyexploresthepotentialofCe/Zr/A1Hydrotaleite-LikeCompounds(HTLcs)fortheremovalofmicrocys.tin(MC)inenvironmenta
4、lwater.CarbonatepillaredCe/Zr/A1.HTLcsweresynthesizedbyeopreeipitationandcharaeterizedbyXRDandIR.TheabsorptionbehaviorofCe/Zr/AI—H'l~stor【lierocystinwerestudiedindetajLResuitsshowedthattheCe/Zr/AI.HTLcssynthesisedundertheconditionsoftemperature80℃.M“/Mmolarratio1:1andpH8.5havegoodadsorptionpe
5、rformancetomierocystin.Undertheoptimumconditions,themaximumadsorptionamountofmicroeystin—LR(MC-LR)byas—synthesisedCe/Zr/A1一HTLcsWaSashishas178~g/g.AndtheadsorptioneficiencyofbothMC-LRandmicrocystin-RR(MC·RR)werehigherthan70%.Comparedwithsilicagelandactivatedcarbon,Ce/Zr/A1一HTI~shasbetteradsor
6、ptionperformance.TheresultsshowedinthisstudysuggestedthattheCe/Zr/A1一HTLcshavepotentialapplicationvaluefortheremovalofmicroeystininenvironmentalwater.Keywords:Ce/Zr/A1hydrotaleite·likecompounds;synthesisandcharacterization;mierocystin;absorptionperformance水滑石(Hydrotalcite)是一種具有層狀結(jié)構(gòu)的的Mg和Al可部分被
7、其他陽離子所取代合成多種雙金屬氫氧化物,其結(jié)構(gòu)類似于水鎂石的正八面二元、三元甚至四元水滑石類化合物(Hydrotalcite—體結(jié)構(gòu),其結(jié)構(gòu)模型如圖1所示。天然水滑石likecompounds,HTLcs);將較大的陰離子基團(tuán)(如的理想分子式為Mg6A1(OH)。CO·6H0,其中雜多陰離子等)引入層間則可合成柱撐水滑石。收稿日期:2014-02—18:修回日期:2014-04-28基金項(xiàng)目:國家自然科學(xué)基金(21071o99)資助;韶關(guān)市科技計(jì)劃項(xiàng)目(2012140544)資助