Precipitate Formation Potential of Resin Regeneration Effluent in the 100-HR-3 Operable Unit

Cantrell, Kirk J.

关键词: AQUIFERS;    CALCIUM PHOSPHATES;    INJECTION WELLS;    KINETICS;    PLUGGING;    POROSITY;    PRECIPITATION;    REGENERATION;    RESINS 100-HR-3 Operable Unit;    precipitate;    precipitate formation;    calcium phosphate;   

DOI  :  10.2172/967932
RP-ID  :  PNNL-18797
PID  :  OSTI ID: 967932
Others  :  Other: 830403000
Others  :  TRN: US200924%%182

学科分类：环境科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Calculations performed as part of this study indicate that injection of treated groundwater containing treated regenerant solution has a high potential for precipitate formation that could lead to plugging of formation porosity surrounding the injection well. In the worst case scenario, substantial plugging could occur within a year of the initiation of injection. Some uncertainty is associated with respect to this conclusion. The uncertainty results from the fact that equilibrium with the most stable mineral assemblage cannot always be assumed and that slow precipitation rates could occur and reliable estimates of precipitation kinetics under Hanford aquifer conditions are not available. It is recommended that the potential of calcium phosphate precipitation be investigated further using a combination of laboratory and field investigations.