摘要：

采用先浸渍后热解的方法制备了磁性生物炭材料，并使用XRD、XPS、VSM对制备的材料进行了表征。结果表明，制备的磁性生物炭主要的活性物质为γ-Fe₂O₃。采用磁性生物炭非均相类Fenton体系处理水中四环素（TC），当初始TC质量浓度为200 mg/L，pH=7，H₂O₂投加量为19.8 mmol/L，磁性生物炭投加量为3 g/L时，处理效果最佳。加入抗坏血酸可以加速铁循环过程，明显改善·OH的生成，进而增强了TC去除率。

关键词: 生物炭, 磁性, 盐酸四环素, 抗坏血酸

Abstract:

The magnetic biochar was prepared by the method of impregnation and pyrolysis. Characterization analysis by XRD, XPS and VSM showed that the main active substance was γ-Fe₂O₃. The magnetic biochar heterogeneous Fenton-like system was used to treat tetracycline hydrochloride(TC) in the water. Results showed that when the initial TC mass concentration was 200 mg/L, the optimal performance was found with the initial pH=7, H₂O₂ dosage 19.8 mmol/L and catalyst dosage 3 g/L. The formation of ·OH, as well as TC removal rate, could be significantly improved by introducing ascorbic acid to Fenton-like system, owing to the acceleration of Fe(Ⅲ)/Fe(Ⅱ) cycle.

Key words: biochar, magnetic, tetracycline hydrochloride, ascorbic acid

中图分类号: 

• X703.1