Efficient roxarsone degradation by low-dose peroxymonosulfate with the activation of recycling iron-base composite material: Critical role of electron transfer

被引：7

作者：

Ma, Xiaoyu ^{[1
]}

Liu, Xitao ^{[1
]}

Shang, Xiao ^{[1
]}

Zhao, Yanwei ^{[1
]}

Zhang, Zhenguo ^{[1
]}

Lin, Chunye ^{[1
]}

He, Mengchang ^{[1
]}

Ouyang, Wei ^{[1
,2
]}

机构：

[1] Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China

[2] Beijing Normal Univ, Adv Interdisciplinary Inst Environm & Ecol, Zhuhai 519087, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2024年 / 469卷

关键词：

Roxarsone; Electron transfer; Heating pad waste; Nonradical; Peroxymonosulfate; EXTRACTION; OXIDATION; PERFORMANCE; MECHANISM; KINETICS; ARSENATE; REMOVAL; WATER; ACID;

D O I：

10.1016/j.jhazmat.2024.134087

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Pollutant degradation via electron transfer based on advanced oxidation processes (AOPs) provides an economical and energy-efficient method for pollution control. In this study, an iron-rich waste, heating pad waste (HPW), was recycled as a raw material, and a strong magnetic catalyst (Fe-HPW) was synthesized at high temperature (900( degrees)C). Results showed that in the constructed Fe-HPW/PMS system, effective roxarsone (ROX) degradation and TOC removal (72.54%) were achieved at a low-dose of oxidant (PMS, 0.05 mM) and catalyst (Fe-HPW, 0.05 g L-1), the ratio of PMS to ROX was only 2.5:1. In addition, the released inorganic arsenic was effectively removed from the solution. The analysis of the experimental results showed that ROX was effectively degraded by forming PMS/catalyst surface complexes (Fe-HPW-PMS*) to mediate electron transfer in the FeHPW/PMS system. Besides, this system performed effective ROX degradation over a wide pH range (pH=3-9) and showed high resistance to different water parameters. Overall, this study not only provides a new direction

引用

页数：11