Biodegradation of perfluorooctanoic acid and perfluorooctanesulfonic acid by a marine microalga Chaetoceros calcitrans MZB-1: kinetic analysis, removal pathways, and effects of environmental factors.
Li W, Meng F, Sun W
Summary
6.7/10Researchers found that a marine diatom can remove 'forever chemicals' (PFOA and PFOS) from water, eliminating about 25-29% of these persistent pollutants over 15 days through a process that follows predictable first-order kinetics, offering a potential low-cost biological approach for contaminated water treatment.
Key Findings
Chaetoceros calcitrans removed 24.65% of PFOA and 29.35% of PFOS at initial concentration of 100 μg/L within 15 days
Removal kinetics followed first-order models with rate constants (k) of 0.014-0.019 day⁻¹
Marine microalga demonstrates viable phytoremediation potential for persistent organic fluorinated pollutants
Original Abstract
This study investigated the removal efficiency and pathways of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) at environmentally relevant concentrations by marine diatom Chaetoceros calcitrans MZB-1, with a particular emphasis on kinetic analysis and optimization of environmental factors. In presence of alga MZB-1, the removal efficiencies of PFOA and PFOS at an initial concentration of 100 μg/L were 24.65 % and 29.35 %, respectively, within 15 d. The removal kinetics followed first-order models, with removal rate constants (k) of 0.014-0.019 d