Identification of grass species candidates for phytostabilization and enhanced metal(loid)s immobilisation using cost-effective amendments on sulfidic mine tailings

Abstract

ABSTRACT Phytostabilization on sulfidic mine tailings is not yet commonly implemented in the field, making it a crucial area of focus for future reclamation efforts. This greenhouse study aimed to explore cost-effective amendments on metal(loid) immobilisation and identify grass species candidates for phytostabilization. This research found that (1) wheatgrass (Pascopyrum) and ryegrass (Lolium multiflorum) are suitable candidates for phytostabilization, and (2) it is cost-effective to reuse wastes of bauxite residue and compost to promote phytostabilization effectiveness. Compost should be carefully evaluated for phytostabilizing Zn in tailings since the Accumulation Factor and Translocation Factor of all selected species are large than 1.