镧钴矿钙钛矿异相活化过一硫酸盐降解卡马西平：性能、机制与毒性。
Carbamazepine degradation by heterogeneous activation of peroxymonosulfate with lanthanum cobaltite perovskite: Performance, mechanism and toxicity.
机构信息
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Key Laboratory of Yangtze River Water Environment for Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
出版信息
J Environ Sci (China). 2020 May;91:10-21. doi: 10.1016/j.jes.2020.01.003. Epub 2020 Jan 17.
The widely used carbamazepine (CBZ) is one of the most persistent pharmaceuticals and suffers insufficient removal efficiency by conventional wastewater treatment. A synthesized Co-based perovskite (LaCoO) was used to activate peroxymonosulfate (PMS) in order to degrade CBZ. Results showed that LaCoO exhibited an excellent performance in PMS activation and CBZ degradation at neutral pH, with low cobalt leaching. The results of FT-IR and XPS verified the high structurally and chemically stability of LaCoO in PMS activation. Electron spin resonance (ESR) analysis suggested the generation of radical species, such as sulfate radicals (SO) and hydroxyl radicals (OH). Radical quenching experiments further revealed the responsibility of SO as the dominant oxidant for CBZ oxidation. Ten products were detected via the oxidation of CBZ, with the olefinic double bond attacked by SO as the initial step. Hydroxylation, hydrolysis, cyclization and dehydration were involved along the transformation of CBZ. The toxicity of CBZ solution was significantly reduced after treating by PMS/LaCoO.
卡马西平（CBZ）是一种广泛应用的药物，其在常规废水处理中去除效率较低。本文合成了一种基于钴的钙钛矿（LaCoO），用于激活过一硫酸盐（PMS）以降解 CBZ。结果表明，LaCoO 在中性 pH 值下具有良好的 PMS 激活和 CBZ 降解性能，且钴浸出率较低。FT-IR 和 XPS 的结果证实了 LaCoO 在 PMS 激活过程中具有较高的结构和化学稳定性。电子自旋共振（ESR）分析表明，产生了自由基物质，如硫酸根自由基（SO）和羟基自由基（OH）。自由基猝灭实验进一步表明，SO 是 CBZ 氧化的主要氧化剂。通过 CBZ 的氧化检测到了 10 种产物，SO 攻击烯烃双键是初始步骤。在 CBZ 的转化过程中涉及羟基化、水解、环化和脱水。PMS/LaCoO 处理后，CBZ 溶液的毒性显著降低。
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