Removal of Hg(II) by XXXX -grafted @entity13528 @ @entity3758 magnetic nanoparticles.

@entity8326 @entity1025 @entity3143 @entity1219 @entity141 @entity8304 @entity71787 @entity3758 @entity13528 @entity5828 @entity6498 @entity597
UNASSIGNED: @entity13528 @ @entity3758 magnetic nanoparticles modified by grafting @entity71787 oligomer (FSPV) was fabricated as a novel adsorbent to remove Hg(II) from water. Fourier transform infra-red spectroscopy confirmed the successful grafting of oligomer, and thermogravimetric analysis showed FSPV had a high grafting yield with organic content of 22.8%. Transmission electron microscopy image displayed that FSPV particles were polymer-coated spheres with size of 10-20  nm. With saturation magnetization of 44.7 @entity6498 /g, FSPV particles could be easily separated from water with a simple magnetic process in 5  min. The Hg(II) adsorption capacity of FSPV was found to be 346  mg/g at pH 7 and 25    C in 10  mM @entity1219 . Moreover, the removal of Hg(II) by FSPV was not obviously affected by solution pH (from 4 to 10) or humic acid (up to 8  mg/L as TOC). The presence of seven common ions including Na(+), K(+), @entity141 , @entity1025 , Cl(-), @entity8326 , and @entity597 (up to 100  mM ionic strength) slightly increased the adsorption of Hg(II) by FSPV. X-ray photoelectron spectroscopy analysis revealed that the N atom of the @entity8304 ring was responsible for the bonding with Hg(II), whereas the bonding of Hg with N did not result in cleavage of Hg-Cl bond in @entity3143 and HgClOH. The regeneration of Hg(II)-loaded FSPV could be achieved with 0.5  M @entity5828 rapidly in 10  min, and the removal of Hg(II) maintained above 94% in five consecutive adsorption-desorption cycles. Therefore, FSPV could serve as a promising adsorbent for Hg(II) removal from water.
