Diatom-assisted biomicroreactor targeting the complete removal of perfluorinated compounds
Journal
Journal of Hazardous Materials
Journal Volume
384
Date Issued
2020
Author(s)
Abstract
Persistent perfluorinated compounds (PFCs) have been recognized as a global environmental issue. Developing methods without leading to additional burden in nature will be essential for PFCs removal. Herein, we functionalized iron nanoparticles on living diatom (Dt) to efficiently enable the Fenton reaction and reactive oxygen species (ROS) production. Iron nanoparticles at the surface of living diatom act as promising catalytic agents to trigger O[rad]H radical generation from H2O2. Dt plays dual roles: i) as solid support for effective adsorption, and ii) it supplies oxygen and inherently produces ROS under stress conditions, which improves removal efficiency of PFCs. We also demonstrated its reusability by simple magnetic separation and 85% of decomposition efficiency could still be achieved. This newly developed diatom-assisted bioremediation strategy enables green and efficient PFC decomposition and shall be readily applicable to other persistent pollutants. ? 2019 Elsevier B.V.
Subjects
Bioremediation; Biotechnology; Decomposition; Efficiency; Iron; Magnetic separation; Nanoparticles; Oxygen; Reactive oxygen species; Reusability; Decomposition efficiency; Environmental issues; Heterogeneous fenton; Living diatom; Perfluorinated compound (PFCs); Perfluorinated compounds; PFCs; Removal efficiencies; Oxidation; hydrogen peroxide; iron nanoparticle; oxygen; perfluoro compound; reactive oxygen metabolite; alkanesulfonic acid; fluorocarbon; octanoic acid derivative; perfluorooctanesulfonic acid; perfluorooctanoic acid; bioreactor; bioremediation; decomposition; diatom; environmental issue; hydroxyl radical; iron nanoparticle; persistent organic pollutant; reactive oxygen species; adsorption; bioremediation; catalyst; decomposition; diatom; Fenton reaction; magnetic separation; nonhuman; pollutant; waste component removal; bioreactor; chemistry; isolation and purification; Bacillariophyta; Alkanesulfonic Acids; Bioreactors; Caprylates; Diatoms; Environmental Pollutants; Fluorocarbons; Magnetic Iron Oxide Nanoparticles
Type
journal article