简介:Chitinisoneofthemostabundantnaturalresources.chitosanisdeacetylatedfromchitin.Asnaturalorganisms,chitosaniseasiertobedecomposedwithorganismsandeatable.Sochitosaniswildlyusedinbiology,medicine,foodstuff,cosmeticsandsoon[1,2]Chitinisasortofnaturalglucosaminecompoundwithwealthyresources,butalargeamountofchitinispreparedfromcrabshellandcrayfishshell.Someresearchworkshavecarriedonthepreparationofchitosanfromotherresources,suchassilkwormpupa,wastemyceliaetc.[3,4]
简介:FurfuralinaqueoussolutionwastreatedbyUV/O3method.Theresultsshowthattheremovalrateoffurfuralisseverelyenhancedandthesynergismphenomenonappearswhenultravioletandozonearepresenttogether.TheinfluencesofexperimentalparameterssuchaspH,theintensityoflightandthenegative-positiveionsonfurfuraldegradationwereinvestigated.Theresultsindicatethatfurfural(300mg/L)isalmostcompletelydegradedafter3hundertheoptimumconditions.TheintermediateinthefurfuraldegradationwascharacterizedbyGC-MSandIRspectrumandthedegradationmechanismoffurfuralbyUV/O3technologywasproposed.