U-isotopes and 226Ra as tracers of hydrogeochemical processes in carbonated karst aquifers from arid areas

Abstract Sierra de Gádor is a karst macrosystem with a highly complex geometry, located in southeastern Spain. In this arid environment, the main economic activities, agriculture and tourism, are supported by water resources from the Sierra de Gádor aquifer system. The aim of this work was to study the levels and behaviour of some of Read more about U-isotopes and 226Ra as tracers of hydrogeochemical processes in carbonated karst aquifers from arid areas[…]

Sequential extraction of 226Ra in sediments from an estuary affected historically by anthropogenic inputs of natural radionuclides

Abstract Riverbed sediments from an estuary historically affected by wastes discharged by several phosphate fertiliser plants and enriched in uranium-series radionuclides were operationally speciated using a Tessier-based method. In each selective fraction the 226Ra content was determined by alpha-particle spectrometry after radiochemical isolation and electrodeposition onto stainless steel planchets. These studies were performed in 226Ra-polluted Read more about Sequential extraction of 226Ra in sediments from an estuary affected historically by anthropogenic inputs of natural radionuclides[…]