Abstract

Phytotechnology utilizes aquatic macrophytes and their microbiomes to remediate chromium-contaminated waters. This study evaluates Azolla pinnata, a free-floating fern, for its potential in sustainable remediation and recovery of Cr(VI) from synthetic wastewater. Results show successful removal of hexavalent chromium through rhizofiltration, where Azolla and algae synergistically reduce chromium concentration. Batch tests at varying initial Cr(VI) concentrations (5, 10, 25, 40, and 50ppm) using 8g of fresh Azolla biomass indicated significant chromium absorption, evidenced by a dark brown coloration. The experiment lasted 14 days, with chromium quantified via the Diphenylcarbazide (DPC) assay and measurements taken spectrophotometrically at 540nm. The findings confirm the effectiveness of this phytoremediation process and highlight the potential of aquatic plants in addressing environmental challenges while promoting a cleaner, healthier earth.

Keywords:Phytoremediation; Chromium; Azolla pinnata; Bioremoval