简介:与TEM和物理煤气的吸附技术,多孔的性质ofnano纤维状的硅石(MLD:92.73%)从天赋,纤蛇纹石在这篇论文被学习。Theresults显示那多孔的nano纤维状的硅石源于naturechrysotile的八面的表完全溶解了的水镁石和有四面的表由酸的沥滤折叠的Si-O。它的长度在微米或纳米规模。有毛孔的二种类型:在附近的纤维之中的毛孔和在nanofiber的毛孔。这些毛孔(在直径的不到6.5nm,主要2.1nm和3.8nm)都属于中央毛孔。在纤维的毛孔在SiO_2粒子之中由那些组成,那些在总数,残余nanotubes和毛状的试管之中。Nano纤维状的硅石作为catalyzer和填料的一个搬运人证明比传统的硅石好为增强橡胶和塑料。
简介:Theadsorptiveremovalofarsenicbysynthetically-preparednanoFe-Mnbinaryoxides(FM)wasinvestigated.AnovelmethodusingpotassiumpermanganateandferricchlorideasrawmaterialswasusedtosynthesiseFM.ThemolarratioofFeandMninthesyntheticFe-Mnbinaryoxideswas4:3.TheFM-1andFM-2(preparedatdifferentactivationtemperatures)havinghighspecificsurfaceareas(358.87and128.58m2/g,respectively)wereamorphousandofnanoparticletypes.TheamountofarsenicadsorbedonFM-1washigherthanthatadsorbedonFM-2particles.AfteradsorptionbyFM-1,residualarsenicconcentrationdecreasedtolessthan10μg/L.Theadsorptionkineticsdatawereanalyzedusingdifferentkineticmodelsincludingpseudofirst-ordermodel,pseudosecond-ordermodel,Elovichmodelandintraparticlediffusionmodel.Pseudosecond-orderkineticmodelwasthemostappropriatemodeltodescribetheadsorptionkinetics.TheadsorptionpercentageofAs(Ⅲ)increasedinthepHrangeof2–3whileitdecreasedwiththeincreaseofpH(3
简介:FattyacidcompositionsoftwostrainsofmarinediatomsNitzschiaclosterium(MACCB222)andChaetocerosgracilis(MACCB13)havebeenexamined.ThemicroalgaehavebeengrownatdifferentinitialNaNO3concentrations(75,375,750,1125,1500,1875mg/L)andharvestedatthelateexponentialphase.TheresultsbyonefactoranalysisofvarianceshowthattheNaNO3concentrationshavenosignificantinfluenceontherelativegrowthrateoftwostrainsofmarinediatoms;theinfluenceofNaNO3concentrationsonthefattyacidsdiffersfromspeciestospecies.Themajorfattyacidsoftwodiatomstrainsare14:0,16:0,16:ln-7and20:5n-3(EPA),B13alsohashighpercentageof20:4n-6(6.0~9.1%).