摘要
Polyepoxysuccinicacid(PESA),asanenvironmentalbenignbiodegradablechelant,wasusedtoremoveheavymetalsfromthesewagesludgeofShanghaiTaopuWastewaterTreatmentPlant.Theextractionofcadmium(Cd)fromsewagesludgeusingaqueoussolutionofPESAwasstudied.ItwasfoundthatPESAwascapableofextractingCdfromthesludge,andtheextractioneffciencywasdependentonbothpHandtheconcentrationofthechelatingreagent.TheextractioneffciencydecreasedgraduallywithincreasingofpH,whereasthedependencyonpHdecreasedastheconcentrationofPESAincreased.InthecaseofthehighPESAtototalmetalratio,e.g.,10:1,theextractioneffciencyreachedabove70%withinthepHrangefrom1to7.Thehighestextractioneffciencyobtainedintheexperimentwas78%.Bycomparingthecontentsoftheheavymetalsinsewagesludgebeforeandaftertheextraction,itwasfoundthattheextractedCdcamemainlyfromthefourfractions:acid-soluble,reducible,oxidizable,andwater-solublefractions.
出版日期
2009年02月12日（中国期刊网平台首次上网日期，不代表论文的发表时间）
