生物炭
化学
催化作用
降级(电信)
碳化
单线态氧
肥料
X射线光电子能谱
环境化学
核化学
化学工程
热解
有机化学
氧气
吸附
农学
工程类
生物
电信
计算机科学
作者
Wen Cheng Huang,Ya-Xin Tang,Xueping Zhang,Ze Luo,Jianqiang Zhang
标识
DOI:10.1016/j.jwpe.2021.102470
摘要
The pollution problem of livestock manure generated by the rapid development of farming industry is becoming more and more serious, and its conversion into functional materials through a new way is of great practical significance for its resource utilization. For the first time, nano zero-valent iron (nZVI)/biochar composites (Fe-RMC-850) were prepared by carbonizing Fe 3 O 4 -rabbit dung and used to activate PMS for degradation of sulfamethoxazole (SMX). The results showed that Fe-RMC-850 had high catalytic activity due to its rich pore, high graphitization and defective structure. When the dosage of Fe-RMC-850 and PMS were 0.3 g/L and 0.25 g/L respectively, the degradation rate of SMX could reach 100% within 20 min, and it still showed good catalytic stability after 5 cycles of experiments. The radical quenching, EPR and XPS results showed that radical and nonradical pathways acted synergistically in the degradation of SMX, in which nZVI, Fe 2+ -biochar and pyridinic N were used as the main active sites of the radical pathway. The nonradical pathway was attributed to the generation of C-O and COO by the oxygen-containing functional groups on the biochar surface. Moreover, the inherent P atoms formed P C and CPO 3 /C 2 PO 2 , thereby producing defective structures, while the graphitic carbon layer provided good electron transfer sites. Consequently, this study provides a nZVI-rabbit manure biochar composite PMS catalytic material with high organic pollutant degradation efficiency and offers a new option for the resource utilization of manure sources. • Fe-RMC-850 activated PMS synthesized by rabbit manure and Fe 3 O 4 . • Temperature has a large influence on the structure of the material. • Iron and biochar synergistically promote ROS production. • Fe-RMC-850 has a strong reusable performance.
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