Enhanced catalytic degradation of tetracycline antibiotic by persulfate activated with modified sludge bio-hydrochar
Enhanced catalytic degradation of tetracycline antibiotic by persulfate activated with modified sludge bio-hydrochar
复制标题
改性污泥生物水炭活化过硫酸盐强化催化降解四环素类抗生素
DOI：
10.1016/j.chemosphere.2020.125854
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发表时间：
2020
期刊：
影响因子：
8.8
通讯作者：
Li Jun
中科院分区：
文献类型：
--
作者：
Wei Jia;Liu Yitao;Zhu Yuhan;Li Jun
本研究采用一锅法制备改性污泥生物水热炭（IBHC）活化过硫酸盐（PS）降解四环素类抗生素。所得IBHC具有缺陷结构、分散的铁和大量的表面有机官能团，是一种性能优异的改性生物质炭材料，用于催化PS，可使TC的去除率高达99.72%。IBHC + PS系统在较低的IBHC投加量（0.2g·L-1）、较低的PS用量（5 mmol·L-1）和较宽的pH值（2-10）范围内，均能有效去除TC。此外，经过5轮重复使用，TC的降解率仍保持在94.70%，证明IBHC具有良好的稳定性和实用性。在IBHC + PS体系中，活化过程中产生了和·OH，并探讨了各组分对TC降解的贡献。根据LC-MS分析结果，推测了TC的降解途径。
In this research, a one-pot prepared modified sludge bio-hydrochar (IBHC) was prepared to activate persulfate (PS) for the degradation of tetracycline (TC) antibiotic. The obtained IBHC bearing defect structure, dispersed iron and large amounts of surface organic functional groups, acts as an outstanding modified biomass carbonaceous material for catalyzing PS to improve the removal efficiency of TC as high as 99.72%. The IBHC + PS system can remove TC effectively with a relative low IBHC dosage (0.2 g·L−1), limited PS consumption (5 mmol·L−1) and wide pH values (2–10). In addition, the degradation of TC still keep in 94.70% after 5 rounds reuse proving that IBHC possesses excellent stability and practicability. During the activation, both and•OH were generated and the contribution of each component on the TC degradation in IBHC + PS system was explored. Furthermore, the degradation pathways of TC were proposed based on the results of LC-MS.