College of Environmental Science and Engineering, Hunan University, Lushan South Road, Yuelu District, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Yuelu District, Changsha 410082, PR China.
College of Environmental Science and Engineering, Hunan University, Lushan South Road, Yuelu District, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Yuelu District, Changsha 410082, PR China.
J Colloid Interface Sci. 2021 Oct;599:631-641. doi: 10.1016/j.jcis.2021.04.074. Epub 2021 Apr 19.
The advanced oxidation process (AOPs) has caused great concern in recent years. Among them, biochar has been widely studied as a catalyst for advanced oxidation process because of its low price and low environmental risk. In this study, a novel ball milling assisted KOH activation biochar (MKBC) was prepared and applied in peroxydisulfate (PDS) activation to degrade tetracycline hydrochloride (TC-H). In comparison with the oxidation (3.48%) by PDS alone and adsorption (36.19%) by MKBC alone, the removal rate of TC-H was increased to 84.15% in the MKBC/PDS system, indicating that MKBC can successfully activate PDS. Besides, the catalytic activity of the MKBC to activate PDS for the degradation of TC-H is 58.33% higher than that of pristine biochar (PBC). In addition, MKBC has outstanding stability that after three repeated experiments, the removal rate of TC-H by the MKBC/PDS system still remains 77.35%. Meanwhile, the mechanism was investigated that the singlet oxygen (O) seized the principal position in the degradation of TC-H in the PDS/MKBC system. This study explored a novel, solvent-free and economic method to propose this extraordinary biochar, which provided a new strategy for the future research of biochar.
高级氧化工艺（AOPs）近年来引起了极大关注。其中，生物炭因其价格低廉、环境风险低而被广泛研究作为高级氧化工艺的催化剂。本研究制备了一种新型球磨辅助 KOH 活化生物炭（MKBC），并将其应用于过二硫酸盐（PDS）活化以降解盐酸四环素（TC-H）。与单独的 PDS 氧化（3.48%）和单独的 MKBC 吸附（36.19%）相比，在 MKBC/PDS 体系中，TC-H 的去除率提高到 84.15%，表明 MKBC 可以成功地活化 PDS。此外，MKBC 对 PDS 活化降解 TC-H 的催化活性比原始生物炭（PBC）高 58.33%。此外，MKBC 具有出色的稳定性，经过三次重复实验，MKBC/PDS 体系对 TC-H 的去除率仍保持在 77.35%。同时，还研究了机制，发现单线态氧（O）在 PDS/MKBC 体系中降解 TC-H 中占据主导地位。本研究探索了一种新颖、无溶剂且经济的方法来提出这种非凡的生物炭，为生物炭的未来研究提供了新策略。
