The phytoremediation ability of a polyculture constructed wetland to treat boron from mine effluent

► We assessed the phytoremediation ability of a polyculture constructed wetland (PCW) to treat boron (B) from mine effluent. ► B in mine effluent decreased from 187 mg l−1 to 123 mg l−1 (32% removal rate) through the PCW. ► Estimated methane production, energy yields and electrical energy yields of the PCW increased with biomass production. ► Cattails accumulated more than 250 mg kg−1 B and common reed accumulated 38 mg kg−1 B at the end of the experiment.