Laboratory-based experiments to investigate the impact of glyphosate-containing herbicide on pollution attenuation and biodegradation in a model pervious paving system

► GCH stimulated high numbers of oil degrading bacteria and fungi. ► Protists were immediately killed by GCH but recovered within a week although, the taxonomic richness was reduced. ► Protists responses may allow the development of a bioindicator system for GCH. ► The GCH negated the trapping and retention of hydrocarbons by the geotextiles. ► The herbicide reduced the capacity of the geotextile to trap metals in the PPS.