Activity ratios of (234)U/(238)U and (226)Ra/(228)Ra for transport mechanisms of elevated uranium in alluvial aquifers of groundwater in south-western (SW) Punjab, India.

摘要: Abstract The concentrations of total dissolved uranium (U), its isotopic composition ( 234 U, 235 238 U) and two long lived Ra isotopes 226 228 Ra) in alluvial aquifers groundwater were determined to investigate the flow pattern south-western (SW) Punjab, India. Particular attention was given spatial variability activity ratios (ARs) U/ U Ra/ predict possible sources supply process into water from solid phase. measured ARs ∼1 or >1 shallow zone (depth   30 m) with relatively low concentration. simultaneous elevated concentration waters possibly due differences imprints rock–water interactions under hydrologic conditions. However, ARs  deficit groundwater. This might be also attributed alpha recoil processes strong dissolution. Overall, decreasing observed SE SW NW ward clearly indicates a paths SW/NW. Similarly, is fairly mobile relative Ra. unusually high amount groundwaters subsequently different geochemistry isotopes. On other hand, varied widely about 50–300 times higher than 232 Th granitic rocks soils. Such elevation dissolution properties their parents during water–rock lattice damage decay local enrichments aquifers.