Bio-waste valorisation: Agricultural wastes as biosorbents for removal of (in)organic pollutants in wastewater treatment

•Bio-waste recovery tackles pollution issues related to water, solid waste and air.•Studies using bio-waste to treat real wastewater samples were reviewed.•Bio-sorbents were reported to tackle in/organic pollutants (including emerging ones).•Realistic studies on the removal of residues in complex matrices are needed.•Thermally activated bio-waste is proven to efficiently remove metals/organics/dyes.