简介：Theannualgrowthringsoftentreesandthesoilsnearthetreerootsweresampledfromtheminingaresoflead-andzinc-dominantmetalsintheXixiaMountain,Nanjing,forthedeterminationofchemicalelementcontents.Thestudyresultsshowedthattheelementalcontentsinthetreeringswerecorrelatedwiththoseinthesoils,i.e.,theelementalcontentsinthetreeringsincreasedwiththoseinthesoils,eveninthecasesofdifferentenvironmentsanddifferenttreespecies.Therefore,atime-concentrationsequencecouldbesetuponthebasisofdeterminingtheelementalcontentsinthesuccessiveannualgrowthringsoftreestoqualitativelyreflecttheannualvariationsofrelevantelementsinthesoils,andatime-concentrationsequenceofelementalcontentsinsoilscouldalsobeestablishedintermsofrelatedmodeltoreproducethedynamicchangesofthesurroundings.

简介：Sorptionofacetanilideherbicides,metolachlor,acetochlor,pretilachlorandbutachloroneightsoilswithvariousphysicalandchemicalpropertieswasstudied,TheadsporptionisothermscouldfitFreundlichequationwell(r^2≥0.91)andtheadsorptionextentsincreasedintheorder:metolachlor