Journal of Nanomedicine & Nanotechnology

Surface and porous properties of polynaphthylamine/Fe3O4 composite and the arsenic adsorption capacity in wastewater

Nanotechnology Congress & Expo

August 11-13, 2015 Frankfurt, Germany

Tran Minh Thi, Nguyen Thi Huyen Trang and Vu Quoc Trung

Poster-Accepted Abstracts: J Nanomed Nanotechnol

Abstract:

The research results of the polynaphthylamine (PNA)/Fe3O4 nanocomposites synthesized by a chemical method for As(III) wastewater treatment are presented in this paper. The X-ray diffraction patterns and transmission electron microscopy images showed that samples had the shel-core structure with the grain sizes varied from 13 nm to 22 nm. The results of vibrating sample magnetometer measurements at room temperature showed that saturation magnetic moments of PNA/Fe3O4 samples decreased from 63.13 emu/g to 43.43 emu/g with the increase of PNA concentration from 5% to 15%. The nitrogen adsorption? desorption isotherm of samples at 77 K was studied in order to investigate the surface and porous structure of nanoparticles by BET method. The pore size distribution of about 15?20 nm was calculated by the BJH (Barrett, Joyner, and Halendar) method at a relative pressure P/P0 of about 1. Although the saturation magnetic moments of samples decreased when the increase of polymer concentration, but the arsenic adsorption capacity of PNA/Fe3O4 sample is better than that of Fe3O4 nanoparticles in a solution with pH=7. In the solution with a pH>14, the arsenic adsorption of magnetic nanoparticles is insignificant.

Biography :

Tran Minh Thi is holding a Past administrative position: Head of General Physics Department; Vice dean of Faculty of Physics.