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.
School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China.
J Colloid Interface Sci. 2021 Mar;585:400-407. doi: 10.1016/j.jcis.2020.11.106. Epub 2020 Dec 8.
Using natural minerals as persulfate activators can develop effective and economical in situ chemical oxidation technology for environmental remediation. Yet, few natural minerals can provide a high activation efficiency. Here, we demonstrate that brochantite (CuSO(OH)), a natural mineral, can be used as a persulfate activator for the rapid degradation of tetracycline hydrochloride (TC-H). Approximately 70% of TC-H was removed in CuSO(OH)/PDS within 5 min, which much higher than that of CuP (61.99%), CuO (29.75%), CNT (25.83%), FeO, (14.48%) and MnO (9.76%). Experiments and theoretical calculations suggested that surface copper acts as active sites induce the production of free radicals. The synergistic effect of Cu/S promotes the cycle between Cu/Cu. Sulfate radicals and hydroxyl radicals are the main reactive oxygen species that are responsible for the rapid removal of TC-H. The findings of this work show a novel persulfate/brochantite system and provide useful information for the environmental remediation.
利用天然矿物作为过硫酸盐的激活剂可以开发出有效且经济的原位化学氧化技术，用于环境修复。然而，很少有天然矿物能够提供高的激活效率。在这里，我们证明了蓝铜矿（CuSO(OH)），一种天然矿物，可以用作过硫酸盐的激活剂，用于快速降解盐酸四环素（TC-H）。在 CuSO(OH)/PDS 中，大约 70%的 TC-H 在 5 分钟内被去除，这远高于 CuP（61.99%）、CuO（29.75%）、CNT（25.83%）、FeO（14.48%）和 MnO（9.76%）。实验和理论计算表明，表面铜作为活性位点诱导自由基的产生。Cu/S 的协同作用促进了 Cu/Cu 之间的循环。硫酸根自由基和羟基自由基是主要的反应性氧物种，负责 TC-H 的快速去除。这项工作的发现展示了一种新的过硫酸盐/蓝铜矿体系，并为环境修复提供了有用的信息。
