This study was supported by the National Natural Science Foundation of China(No.41302192);Natural Science Foundation of Hebei Province of China(No.D2018504011);China Geological Survey(No.DD20190555);the Ministry of land and resources of the People’s Republic of China(No.201411052).
Hydrogeochemical processes that would occur in polluted groundwater and aquifer system,may reduce the sensitivity of Sr isotope being the indicator of hydraulic fracturing flowback fluids(HFFF)in groundwater.In this p...