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

被引：29

作者：

Yao, Bin ^{[1
]}

Chen, Xia ^{[1
]}

Zhou, Kun ^{[1
]}

Luo, Zirui ^{[1
]}

Li, Peipei ^{[1
]}

Yang, Zihui ^{[2
]}

Zhou, Yaoyu ^{[1
]}

机构：

[1] Hunan Agr Univ, Hunan Int Sci & Technol Cooperat Base Agr Typ Pol, Coll Resources & Environm, Changsha 410128, Peoples R China

[2] Hunan Agr Univ, Coll Vet Med, Changsha 410128, Peoples R China

来源：

BIOCHAR | 2022年 / 4卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Persulfate; Biochar; Manganese ferrite; Redox cycle; Organic arsenic compounds; ORGANIC CONTAMINANTS; AQUEOUS-SOLUTION; DEGRADATION; ACTIVATION; REMOVAL; WATER;

D O I：

10.1007/s42773-022-00158-x

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Direct 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. O-2(-) and O-1(2) were the main reactive oxygen species (ROS) responsible for p-ASA degradation, and O-1(2) 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. [GRAPHICS] .

引用

页数：13