School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei, 230601, China; Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, Hefei, 230061, China; Key Laboratory of Water Pollution Control and Wastewater Reuse of Anhui Province, Hefei, 230061, China.
School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, Guangdong, China.
Chemosphere. 2021 Sep;278:130368. doi: 10.1016/j.chemosphere.2021.130368. Epub 2021 Apr 2.
Carbamazepine (CBZ) antibiotic organic contamination wastewater poses a huge threat to environmental safety. An advanced oxidation technology (Fe/PDS/US) of using ultrasound (US) enhanced zero-valent iron/potassium persulfate (Fe/PDS) can remove CBZ effectively. The optimal reaction conditions were determined by exploring the effect of single-factor experimental conditions such as ultrasonic power, ultrasonic frequency, CBZ concentration, solution pH, PDS dosage, and Fe dosage on the removal of CBZ. In addition, we also investigated into the effect of background ions (PO, HCO, Cl and HA) on Fe/PDS/US and analyzed the related results. The mechanism of CBZ removal in Fe/PDS/US were explored by analyzing CBZ removal efficiency and reaction rates, the ion concentration of SO, SO, Fe and Fe, pH and the active radicals. The result indicates that US can improve the efficiency of activated PDS and expand the pH range of Fe/PDS. It has prominent performance in catalytically degrading CBZ when the pH is 10.0. SO, OH and O all coexist in the Fe/PDS/US and make contribution to CBZ removal, whereas the SO plays a key role. US can greatly promotes the degradation of target pollutant CBZ by speeding up the dissolution of the outer portion of iron powder, producing sufficient amount of Fe with a continuous and stable way, and better activating SO to generate sufficient SO radicals. The degradation of CBZ may embrace three reaction processes, in which organic intermediate products with low molecular weight and biological toxicity is produced, boosting further mineralization and biodegradation of products. The Fe/PDS/US is of great potential application value in removal of organic pollution and environmental purification.
卡马西平（CBZ）抗生素有机污染废水对环境安全构成巨大威胁。一种利用超声波（US）增强零价铁/过硫酸钾（Fe/PDS）的高级氧化技术（Fe/PDS/US）可以有效地去除 CBZ。通过探索超声功率、超声频率、CBZ 浓度、溶液 pH 值、过二硫酸盐（PDS）用量和铁用量等单因素实验条件对 CBZ 去除效果的影响，确定了最佳反应条件。此外，我们还研究了背景离子（PO、HCO、Cl 和 HA）对 Fe/PDS/US 的影响，并分析了相关结果。通过分析 CBZ 去除效率和反应速率、SO、SO、Fe 和 Fe 的离子浓度、pH 值和活性自由基，探讨了 CBZ 在 Fe/PDS/US 中的去除机制。结果表明，US 可以提高 PDS 的活化效率，扩大 Fe/PDS 的 pH 范围。当 pH 值为 10.0 时，它在催化降解 CBZ 方面表现出突出的性能。SO、OH 和 O 都存在于 Fe/PDS/US 中，对 CBZ 的去除都有贡献，而 SO 起关键作用。US 可以通过加速铁粉外部分解、以连续稳定的方式产生足够量的 Fe、更好地激活 SO 生成足够的 SO 自由基，从而大大促进目标污染物 CBZ 的降解。CBZ 的降解可能包含三个反应过程，其中会产生低分子量和生物毒性的有机中间产物，从而促进产物的进一步矿化和生物降解。Fe/PDS/US 在去除有机污染和环境净化方面具有巨大的潜在应用价值。
