Petroleum Migration And Transformation Of Pollutants In The Environment Of The Loess Plateau Research

The transport regularity Of petroleum pollutants in the loess plateau has beenStudied systematically in this thesis by analogous experiments of removal. Thecontents and main achievments are as followed:l.The adsorption and desorption of petroleum pollutants in batch testsThe dynamics and some major influence factors of the adsorption anddesorption of petroleum pollutants have been studied by batch tests. The resultsshow that the velocity of the adsorption and desorption of petroleum pollutantsis so fast that the equilibration can be basically got in 10 minutes.Theadsorption conforms to the equilibration isotherm of Herry and the divisioncoefficient is 134.07.The concentration of sediments,temperature,pH andTDS all affect the adsorption and desorption of petroleum polluatants in somedegree.2.The adsorption and desorption of petroleum pollutants in riverThe adsorption and desorption of petroleum pollutants in river has beenstudied dynamically by analogous riverway in laboratory.The results show thatthe dynamics process of the adsorption and desorption of petroleum pollutantin the static state (batch tests) and in the dynarmic state are almost same.But inthe adsorption of dynamic state,the time to get equilibration islonger than the one in the static,and the petroleum pollutants concentration inwater is lower.In the desorption conditions of dynamic state,the equilibrationpetroleum pollutants concentration in water is about 30% higher than the one ofstatic tests.3.The verhal ~ort ds of-- pollwt in the bosThe reboe dynwt of -- pollutan in loess has bo studied bysoil cofor wt teSts uSin the sOil samPle whose Wn tw iszs82tw m nd ho be the reta ratio ot -- potwfrOm CrUde Oil COntain loess is l.7l%, the bo COnCenfor Ofpch pollutan ed in water is 7.75mgh the pes curv ofreto ds in the ha ot bo ewonen allout the. Bod on theresearc be the tnatri m~ or pe pe retotw in loess are buil uP, wbo aCOul wall wAn the -- results.At the sare time, the verthal mp bo Of --Pbllwt in the bos are haed by soil column Pentwn bo in SeVendInaor ha-- COntw. The results bo tha most Pds POllutan are-- in the de soil for the Veniai mportjn, the pollutan canbe foun in the wi Of 30cm Unde the soil sds. The VeniCal mp ofthe -- pollutan in leOss can be devided intO twO partS, the InaOrity of-- Pouutan in the boss -- slowtr in the bo or oc and theH tusPOrtS fas in the form Of sMn. ffe ed ptan twpe, stay time of the polItw in sOils, wafor head aCtin on the soilds all affee the pollwt Vetheal mp in some for.4.The vertical op Inatbmatal modds of the pds pbllwt in loespeBased on the botics Of Vertjcai mport of pds pollutan,bo rnathmahal mothe are bde uP. One is the mahaatical mp medelof NAPL petrOleUm pollutan, the Other is the bo mp mode ofsall pds pollufor. m tWo nd op rnathmahal modelnd weu wun the -- resto.5Th sbo -- and tw mode of the VOWbo processof the Petrtw POllutan in loess platwThe -- of the theon PrOCeSS of pe POllutan hasbeen ch by shalfor exPerimnts. The reSults Show Ihat deSPhe thewt, wind Velocity baSe InaW al1 havin som haUenCe on thevolathe vefocity Of pe polhan, the -- VOlathe quality isM same, W Ws tw l3 percent of the PetrOleum POllutan totalwot The N models of the Mn pos Of --pollutan on the bo Of lDe8 soil and wafor body are bds uP wbo aCOulwen wun -- the.