简介：TwoecotypesofElsholtzia,ElsholtziasplendensandE.Argyi,aredominantplantsgrowingonCuandPb-Znsmelters,respectively.SamplesofthetwoecotypesandthecorrespondingsoilsfromfieldsofacopperminingareaandaPb-ZnminingareaofZhejiangProvince,China,wereanalyzedtoinvestigateCuorZntoleranceofthesetwoecotypes.EffectsofnineCulevels(0,5,10,20,40,80,160,240and320mgCuL-1asCuSO4@SH20)ongrowthanduptake,translocationandaccumulationofCuinthesetwoecotypeswereexaminedinasolutioncultureexperiment.Theexperimentalresultsshowedthatdryweights(DW)ofshootsandrootsweredepressed,andgrowthofE.SplendenswaslessdepressedthanthatofE.Argyiwhentreatedwith≥5mgCuL-1.ConcentrationsofCuinshootsofE.SplendensandE.Argyiexceeded1000mgkg-1DWat≥40mgCuL-x.ThemaximumCuaccumulatedintheshootsofGu-treatedE.SplendensandE.Argyireached101and142μgplant-1.Furthermore,analysisofplantsamplesfromthefieldsshowedthatthesetwoecotypescantolerantexcessheavymetalsandproducedhighdrymatter,andE.Splendenscanaccumulate11.7mgCuplant-1grownontheCusmelter.Therefore,E.SplendensandE.Argyicouldbegoodplantsforphytoremediation.

简介：AmathematicalexpressionofFreundlichkineticequation,lnS=A'+B'lnt,ispresented,andthephysicalmeaningsofitsparametersareindicated.AlthoughtheFreundlichkineticequationandthetwo-constantequationarethesameintheform,thederivationoftheFreundlichkineticequationisprecise,whilethederivationofthetwo-constantequationhassomecontradictionsandisunreasonable,AnditissuggestedthattheFreundlichkineticequationshouldhaveprorityoverthetwo-constantequationtobeused.

简介：Thelowremovaleffciencyoftotalnitrogen(TN)isoneofthemaindisadvantagesoftraditionalsinglestagesubsurfaceinfiltrationsystem,whichcombinesananaerobictankandasoilfilterfield.Inthisstudy,afull-scale,two-stageanaerobictankandsoiltrenchsystemwasdesignedandoperatedtoevaluatethefeasibilityandperformancesintreatingsewagefromaschoolcampusforoveraone-yearmonitoringperiod.Therawsewagewaspreparedandfedintothefirstanaerobictankandsecondtankby60%and40%,respectively.Thisnovelprocesscoulddecreasechemicaloxygendemandwiththedichromatemethodby89%-96%,suspendedsolidsby91%-97%,andtotalphosphorusby91%-97%.Thedenitrificationwassatisfactoryinthesecondstagesoiltrench,sotheremovalsofTNaswellasammonianitrogen(NH+4-N)reached68%-75%and96%-99%,respectively.ItappearedthattheremovaleffciencyofTNinthistwo-stageanaerobictankandsoiltrenchsystemwasmoreeffectivethanthatinthesinglestagesoilinfiltrationsystem.Theeffuentmetthedischargestandardforthesewagetreatmentplant(GB18918-2002)ofChina.

简介：Soilmacroinvertebratesarehighlydiverseandtheirmajorecologicalserviceincludebreakdownoforganicmatterandinturnimprovesoilfertilityandpill-millipedesarewell-knownfortheirsigni?cantroleiningestion,disintegrationanddecompositionoforganicmatterinsoil.Thisstudycharacterizedthefeed,thedecomposingleaflitterofcoconut(Cocosnucifera),andfaecesoftwoendemicgiantpill-millipedesArthrosphaeradistictaandA.fumosacollectedfromforestsoftheWesternGhatsofIndiabasedonchemicalfeaturesandmicrobialpro?le.Inbothmillipedes,electricconductivityandtotalphosphorusweresigni?cantlyincreasedinfaeces,whilethecrudeprotein,organiccarbon,totalnitrogenandtotalphenolicsweresigni?cantlydecreased,ascomparedtothoseinfeed.Heterotrophicbacteria,actinomycetes,rhizobiaandphosphate-solubilizingbacteriaweresigni?cantlyhigherinfaecesthaninfeed,while?lamentousfungiandyeastsubstantiallydecreasedinfacescomparedtofeedinboththemillipedes.Spectrumoffattyacidmethylesterswasconsiderablydifferentbetweenfeedandfaecesofboththemillipedes.Thetotalsaturatedfattyacidswerehigherthanthetotalunsaturatedfattyacidsinfeedaswellasfaeces,whiletheratioofunsaturated/saturatedfattyacidsdecreasedfromfeedtofaeces.DodecanoicandtetradecanoicacidsinA.distictaandoctadecanoicacidinA.fumosasigni?cantlyincreased,while(9Z)-octadec-9-enoicand(9E,12E)-octadeca-9,12-dienoicacidsinA.distictaandhexadecanoic,tetracosanoicand(9E,12E)-octadeca-9,12-dienoicacidsinA.fumosasigni?cantlydecreasedinfaecescomparedtofeed,indicatingmillipede-dependentchangesinfattyacids.Icosanoicacidwaspresentinfaecesofboththemillipedes,andhexadec-9-enoicacidwascon?nedtofaecesofA.disticta,whilepentadecanoic,heneicosanoic,(9Z,12Z,15Z)-9,12,15-octadecatrienoicandeicosenoicacidswerecon?nedtofaecesofA.fumosa.Pill-millipedesenrichthesoilqualitybyleaflitterconditioningintheirgutthroughspeci?cmi