High chloride, sulphate and fluoride concentrations in clay-rich aquitard porewater, the North China Plain: evidence of geochemical behavior
The focus of this investigation was to constrain the porewater chemistry from tracer and ion profiles in a Softshell Trousers 128 m thick clay-rich sequence of Quaternary sediments comprising the clay, silt and fine sand formation in the North China Plain.Porewater are much more saline (1.1-71.0 g/L) than the lower confined groundwaters (0.3-1.3g/L