Preparation of biochar/iron mineral composites and their adsorption of methyl orange
Y. Q. Dong, Jianjun Liang, E Zhengyang, Jiayu Song, Changjie Liu, Zhe Ding, Wei Wang, Wentao Zhang
Abstract
, outperforming their pristine biochar. The removal of MO showed a synergistic effect due to the loading of iron-bearing minerals. The mechanisms of MO immobilization by biochar samples were explored by experimental and characterization methods. It was found that the mechanisms responsible for MO immobilization on composites were conducted by electrostatic attraction, complexation with oxygen-containing functional groups, π-π interaction and hydrogen bond formation. This finding clarified the relationship among biomass composition, iron mineral evolution, and the adsorption capacity of iron-modified biochar, which is essential for the development of a cost-effective adsorbent.