过硫酸盐
化学
生物炭
激进的
核化学
硫酸盐
清除
四环素
电子顺磁共振
降级(电信)
矿化(土壤科学)
质谱法
环境化学
无机化学
热解
催化作用
放射化学
色谱法
有机化学
生物化学
抗氧化剂
物理
电信
抗生素
氮气
核磁共振
计算机科学
作者
Fengli Shao,Wang Ying-jie,Yingrong Mao,Ting Shao,Jingge Shang
出处
期刊:Chemosphere
[Elsevier]
日期:2020-12-01
卷期号:261: 127844-127844
被引量:74
标识
DOI:10.1016/j.chemosphere.2020.127844
摘要
Biochar supported nanosized iron (nFe(0)/BC) was synthesized and used as a persulfate (PS) activator to degradation tetracycline (TC). The influence of the initial pH values, PS and nFe(0)/BC dosage, initial TC concentration, and coexist anions were investigated. In the nFe(0)/BC-PS system, TC could be effectively removed at various pH values (3.0-9.0). The degradation efficiency of TC (100 mg/L) was 97.68% using nFe(0)/BC (0.4 g/L) and persulfate (1 mM) at pH 5.0. Coexisting ions (HCO3- and NO3-) had an inhibitory effect on TC degradation. The removal of TC could be fitted by a pseudo-second-order model. Electron-Spin Resonance (ESR) analysis and scavenging tests suggested that sulfate radicals (SO4·-) and hydroxyl radicals (HO·) were responsible for TC degradation. Details of the advanced oxidation process (AOP)-induced degradation pathways of TC were determined based on liquid chromatography mass-spectrometry (LC-MS) analysis. The nFe(0)/BC could still maintain 86.38% of its original removal capacity after five cycles. The findings of this study proved that nFe(0)/BC can be applied to activate PS for the treatment of pollution caused by TC.
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