期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 417, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126106
关键词
Biochar; Green nano-zero-valent iron; Persulfate; P-nitrophenol; Degradation
资金
- National Natural Science Foundation of China [41977074]
- Major Science and Technology Program for Water Pollution Control and Treatment [2018ZX07601-003]
In this study, green nano zero-valent iron biochar was prepared using green synthesis method with green tea extraction solution as reducing agent and green tea residues as raw material. This material showed improved dispersibility of Fe0, prevented agglomeration, and promoted PNP degradation. The system had high oxidation resistance, effective catalytic degradation pathways, and good removal effect on PNP.
In this study, with the green tea extraction solution as a reducing agent and green tea residues as a raw material of biochar, green nano zero-valent iron biochar (G-nZVI-BC) was prepared with the green synthesis method and then combined with potassium persulfate to degrade p-nitrophenol in water. Compared with zero-valent ironloaded biochar (C-nZVI-BC) prepared by the traditional chemical liquid phase synthesis method, G-nZVI-BC containing tea polyphenols further improved dispersibility of Fe0 on biochar, prevented nZVI agglomeration on BC, and promoted PNP degradation. The system constructed by G-nZVI-BC/PDS showed the high oxidation resistance than the C-nZVI-BC/PDS system, thus endowing the synthesis material with long-term reactivity. Both the radical pathway and non-radical pathways contributed to catalytic degradation and free radicals played a key role. The G-nZVI-BC/PDS system realized the good removal effect on PNP in the pH range of 3.06-9.23. The reusability of G-nZVI-BC and the PNP removal effect in water body conditions indicated that G-nZVI-BC had a good application prospect in the field of water treatment.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据