p-Arsanilic acid decontamination over a wide pH range using biochar-supported manganese ferrite material as an effective persulfate catalyst: Performances and mechanisms

Author:

Yao Bin,Chen Xia,Zhou Kun,Luo Zirui,Li Peipei,Yang Zihui,Zhou YaoyuORCID

Abstract

AbstractDirect chemical oxidation and pure adsorption could not effectively remove p-Arsanilic acid (p-ASA) and the released inorganic arsenic. Herein, one novel biochar supported MnFe2O4 (MFB) was synthesized and adopted for p-ASA degradation and synchronous adsorption of the generated inorganic arsenic. The MFB/persulfate (PS) system could remain effective under a wide pH range (3.0–9.0), and the released arsenic could be removed simultaneously by MFB. Mechanism investigation revealed that the functional groups of MFB (i.e. O–C=O and C=O), Fe and Mn oxides on MFB all contributed to PS activation. O2·− and 1O2 were the main reactive oxygen species (ROS) responsible for p-ASA degradation, and 1O2 was the predominant ROS. Besides, the MFB  possessed superior reusability. Therefore, it is expected to develop a potential method for organic arsenic contaminants removal via an oxidation-adsorption process, and the results could also shed light on the better understanding of the PS activation mechanisms. Graphical Abstract

Funder

National Natural Science Foundation of China

Natural Science Foundation of Hunan Province, China

Science and Technology Innovation Leading Plan of High Tech Industry in Hunan Province

Training Program for Excellent Young Innovators of Changsha

Publisher

Springer Science and Business Media LLC

Subject

Pollution,Soil Science,Environmental Science (miscellaneous),Biomaterials

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