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首页> 美国政府科技报告 >Understanding Variation in Partition Coefficient, K(d), Values. Volume 2. Review211 of Geochemistry and Available K(d) Values for Cadmium, Cesium, Chromium, Lead, 211 Plutonium, Radon, Strontium, Thorium, Tritium (3H), and Uranium
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Understanding Variation in Partition Coefficient, K(d), Values. Volume 2. Review211 of Geochemistry and Available K(d) Values for Cadmium, Cesium, Chromium, Lead, 211 Plutonium, Radon, Strontium, Thorium, Tritium (3H), and Uranium

机译：了解分区系数，K（d），值的变化。第2卷。地球化学和有效K（d）的评论211镉，铯，铬，铅，211钚，氡，锶，钍，氚（3H）和铀的数值

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This two-volume report describes the conceptualization, measurement, and use of211u001ethe partition (or distribution) coefficient, K(sub d), parameter, and the 211u001egeochemical aqueous solution and sorbent properties that are most important in 211u001econtrolling adsorption/retardation behavior of selected contaminants. The report 211u001eis provided for technical staff from EPA and other organizations who are 211u001eresponsible for prioritizing site remediation and waste management decisions. 211u001eVolume I discusses the technical issues associated with the measurement of K(sub 211u001ed) values and its use in formulating the retardation factor, R(sub f). The K(sub 211u001ed) concept and methods for measurement of K(sub d) values are discussed in detail 211u001ein Volume I. Particular attention is directed at providing an understanding of: 211u001e(1) the use of K(sub d) values in formulating R(sub f), (2) the difference 211u001ebetween the original thermodynamic K(sub d) parameter derived from ion-exchange 211u001eliterature and its 'empiricized' use in contaminant transport codes, and (3) the 211u001eexplicit and implicit assumptions underlying the use of the K(sub d) parameter in 211u001econtaminant transport codes. A conceptual overview of chemical reaction models 211u001eand their use in addressing technical defensibility issues associated with data 211u001efrom K(sub d) studies is presented. The capabilities of EPA's geochemical 211u001ereaction model MINTEQA2 and its different conceptual adsorption models are also 211u001ereviewed. Volume II provides a 'thumb-nail sketch' of the key geochemical 211u001eprocesses affecting the sorption of selected inorganic contaminants, and a 211u001esummary of K(sub d) values given in the literature for these contaminants under 211u001eoxidizing conditions. The contaminants chosen for the first phase of this project 211u001einclude chromium, cadmium, cesium, lead, plutonium, radon, strontium, thorium, 211u001etritium (3 H), and uranium. Important aqueous speciation, 211u001e(co)precipitation/dissolution, and adsorption reactions are discussed for each 211u001econtaminant. References to related key experimental and review articles for 211u001efurther reading are also listed.

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