Recyclable nanoscale zero-valent iron-based magnetic polydopamine coated nanomaterials for the adsorption and removal of phenanthrene and anthracene.
In this study, nanoscale zero-valent iron nanoparticles (NZVIs) were coated with silica and polydopamine using a two-step process. The coated nanoparticles were applied as adsorbents for removal of two common polycyclic aromatic hydrocarbons pollutants, phenanthrene (PHE) and anthracene (ANT) from aqueous system. Adsorption kinetics followed a pseudo-second-order model. Isotherms and thermodynamics were investigated and the results indicated that the adsorption process fit best to the Freundlich model and exhibited the characteristics of an exothermal physical adsorption process. Owing to their superparamagnetic characteristics and stability, these adsorbents could be easily collected and recycled for reuse.
Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum Beijing , Beijing , P.R. China.
Jing
J
Li
Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum Beijing , Beijing , P.R. China.
Qingxiang
Q
Zhou
Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum Beijing , Beijing , P.R. China.
Yongli
Y
Liu
Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum Beijing , Beijing , P.R. China.
Man
M
Lei
Magnetic polydopamine nanoparticles; adsorption; anthracene; magnetic separation; phenanthrene