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ATTACHMENT 1►1 <br /> Retvateh and'o cionment EPA-603,'S3-82,019 .fugue 11932 <br /> Project Summary <br /> . Volatiliza-tion of organic <br /> Pollo�an-s from Water <br /> s . <br /> 4.Mackay,W.Y.Shiu,A.Bobra,J.Bitlington,E.Chau.A.Yeun.C.Ng.and F. <br /> "A Szeto <br /> t-A <br /> The voiztilixation sof organic envir- of 11 compounds covering a wide <br /> onmental contaminants from water range of Henry's law constant. The <br /> bodies to the atmosphere was investi- relevant hydrodynamic data were also i <br /> gated.The general aim was to eluci- obtained. It wwhitman <br /> as tman that the <br /> date the factors that control the vola- two-resistance or Whimodel of <br /> tilixation.process and develop predic- mass transfer adequately describes <br /> r` live me?':ids for calculating volatilixa- the volatilization process.Correlations <br /> tion ratesforvariouscompoundsfrom hph <br /> m sre l�transfer coed for the 'ffic ents squid and ea <br /> " rivers, lakes, and other water bodies p <br /> r«. under various conditions of tempera- function of wind speed and solute <br /> tore and wind speed. properties. <br /> The rtpartcontainsboth theoretical Henry's law. constant data were <br /> and experimental studies and a eom- obtained fora number of organic <br /> %y prehcnsive review of the equilibrium solutes using a previously developed <br /> physical chemistry and thermody- gas s;:ip rg s,stem. A novel system <br /> namies of systems involving hydra- eves also c:c eped that is suitable for { <br /> phobic oiganie:olutesand water.One the measurement of Hen.-Y•s law <br /> :., result of the thermodynamic analysis constants in the range of 10-t to 10" <br /> ++as the development o! a fugacity atm mt:mole, The system ossen,ially <br /> approach for calculating multi-phase involves batch distilling a solute—Valet <br /> equilibria applicable to environmental mixture. <br /> partitioning.The approach can also be Determinations of Henry's law <br /> applied tocalculatingmulti•resistance constant are also reported for soiu:ei. <br /> transfer as may occur in lakes. in the presence of dissolved organic <br /> Correlations were developed far humic matter•.!t is concluded that the <br /> predicting or checking consistency of dissoived organic matter will rarely be <br /> data for aqueous solubility, vapor present at concentrations that will <br /> 1 pressure. Henry's law constant and significantly affect solubility and <br /> octanol•water partition coefficient, hence Henry's law constant. <br /> The experimental program developed A general procedure is suggested <br /> a small-scale laboratory system that is for calculating volatilization rates of <br /> solutes from rivers and lakes and for <br /> suitable for studying volatilisation <br /> characteristics of solutes from water obtaining the necessary fundamental <br /> r. under controlled conditions of tem- physical-chemical data. A number o! <br /> peroture,concentration,and turbulence, <br /> recamrn:ndations ore made for future <br /> and in the presence of co•solutes or studies. particularly to determine the <br /> sarbenls. The test may be used for effect of surface organic films. <br /> -'• volatilization screening purposes.A S- This Project 5umvArcuniary wrt l Re- <br /> m-long by 50—cm-deep wind wave aped by EPA's Environmental Re- <br /> t <br /> tank was used to study the vola tilizadon search laboratory, Athens. GA, to <br />