Nitrate is a common chemical contaminant in the world resulting largely from industrial discharge,animal manure and atmospheric deposition from nitrogen oxide emission.
The persulfate(PS)activator,ZVI-Sludge Derived Biochar(ZVI-SDBC),was prepared by pyrolyzing(1L min-1 of N2,400℃ and 2h)sewage sludge which has been pretreated by excess NaBH4.