Degradation of norfloxacin by red mud-based prussian blue activating H2O2: A strategy for treating waste with waste

被引:3
|
作者
Liu, Shitong [1 ,2 ]
Wang, Jun [1 ,2 ]
Liu, Yang [1 ,2 ]
Yang, Baojun [1 ,2 ]
Hong, Maoxin [1 ,2 ]
Yu, Shichao [1 ,2 ]
Qiu, Guanzhou [1 ,2 ]
机构
[1] Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China
[2] Cent South Univ, Minist Educ, Key Lab Biohydromet, Changsha 410083, Peoples R China
基金
中国国家自然科学基金;
关键词
Red mud; Prussian blue; Norfloxacin; Degradation; MOLECULAR-OXYGEN; ADVANCED OXIDATION; SINGLET OXYGEN; KINETICS; PERSULFATE; MECHANISM; WATER; DECOMPOSITION; REMOVAL; PEROXYMONOSULFATE;
D O I
10.1016/j.ecoenv.2023.115794
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The massive accumulation of red mud (RM) and the abuse of antibiotics pose a threat to environment safety and human health. In this study, we synthesized RM-based Prussian blue (RM-PB) by acid solution-coprecipitation method to activate H2O2 to degrade norfloxacin, which reached about 90% degradation efficiency at pH 5 within 60 min and maintained excellent catalytic performance over a wide pH range (3-11). Due to better dispersion and unique pore properties, RM-PB exposed more active sites, thus the RM-PB/H2O2 system produced more reactive oxygen species. As a result, the removal rate of norfloxacin by RM-PB/H2O2 system was 8.58 times and 2.62 times of that by RM/H2O2 system and PB/H2O2 system, respectively. The reactive oxygen species (ROS) produced in the degradation process included center dot OH, center dot O2- and 1O2, with 1O2 playing a dominant role. The formation and transformation of these ROS was accompanied by the Fe(III)/Fe(II) cycle, which was conducive for the sustained production of ROS. The RM-PB/H2O2 system maintained a higher degradation efficiency after five cycles, and the material exhibited strong stability, with a low iron leaching concentration. Further research showed the degradation process was less affected by Cl-, SO42-, NO3- , and humic acids, but was inhibited by HCO3and HPO42-. In addition, we also proposed the possible degradation pathway of norfloxacin. This work is expected to improve the resource utilization rate of RM and achieve treating waste with waste.
引用
收藏
页数:12
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