Efficient removal of crystal violet using Fe3O4-coated biochar: the role of the Fe3O4 nanoparticles and modeling study their adsorption behavior

• DOI: 10.1038/srep12638
• Publication Date: 2015-07-29T10:35:35Z
• Authors: Pengfei Sun; Cai Hui; Rashid Azim Khan; Jingting Du; Qichun Zhang; Yu-Hua Zhao
• Keywords: Crystal violet; Endothermic process; Saturation (graph theory)

Biochar shows great promise for use in adsorbing pollutants. However, a process enhancing its adsorption capacity and re-collection efficiency is yet to be further developed. Hence, this study, we developed type of biochar coated with magnetic Fe3O4 nanoparticles (i.e., (MBC)) assessed crystal violet (CV) as well recycling potential. The coating nanoparticles, which was not only on the surface, but also interior biochar, performed two functions. Firstly, it produced saturation magnetization 61.48 emu/g, enabled being efficiently re-collected using magnet. Secondly, significantly enhanced (from 80.36 99.19 mg/g). MBC determined largest by so far (349.40 mg/g) an initial CV concentration 400 mg/L, pH 6.0, temperature 40 °C, 73.31 mg/g. found spontaneous endothermic physical intraparticle diffusion limiting step. These findings inspire us other similar materials tackle menace pollutions.