National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China.
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China.
J Hazard Mater. 2024 May 5;469:133869. doi: 10.1016/j.jhazmat.2024.133869. Epub 2024 Feb 24.
Whether it's necessary to extra chemical synthesis steps to modify nZVI in peroxymonosulfate (PMS) activation process are worth to further investigation. The 56 mg/L nZVI/153.65 mg/L PMS and 56 mg/L sulfidated nZVI (S-nZVI) (S/Fe molar ratio = 1:5)/153.65 mg/L PMS) processes could effectively attain 97.7% (with k of 3.7817 min) and 97.0% (with k of 3.4966 min) of the degradation of 20 mg/L sulfadiazine (SDZ) in 1 min, respectively. The nZVI/PMS system could quickly achieve 85.5% degradation of 20 mg/L SDZ in 1 min and effectively inactivate 99.99% of coexisting Pseudomonas. HLS-6 (5.81-log) in 30 min. Electron paramagnetic resonance tests and radical quenching experiments determined SO, HO•, O and O were responsible for SDZ degradation. The nZVI/PMS system could still achieve the satisfactory degradation efficiency of SDZ under the influence of humic acid (exceeded 96.1%), common anions (exceeded 67.3%), synthetic wastewater effluent (exceeded 90.7%) and real wastewater effluent (exceeded 78.7%). The high degradation efficiency of tetracycline (exceeded 98.9%) and five common disinfectants (exceeded 96.3%) confirmed the applicability of the two systems for pollutants removal. It's no necessary to extra chemical synthesis steps to modify nZVI for PMS activation to remove both chemical and biological pollutants.
是否需要额外的化学合成步骤来修饰 nZVI 以在过一硫酸盐（PMS）活化过程中，这值得进一步研究。56mg/L nZVI/153.65mg/L PMS 和 56mg/L 硫化 nZVI（S-nZVI）（S/Fe 摩尔比=1:5）/153.65mg/L PMS）工艺可以分别有效地在 1 分钟内将 20mg/L 磺胺嘧啶（SDZ）的降解率提高到 97.7%（k 值为 3.7817 min）和 97.0%（k 值为 3.4966 min）。nZVI/PMS 体系可以在 1 分钟内迅速将 20mg/L SDZ 的降解率达到 85.5%，并有效地使共存的假单胞菌失活 99.99%。在 30 分钟内达到 5.81-log。电子顺磁共振测试和自由基淬灭实验确定 SO、HO•、O 和 O 是 SDZ 降解的原因。在腐殖酸（超过 96.1%）、常见阴离子（超过 67.3%）、合成废水流出物（超过 90.7%）和实际废水流出物（超过 78.7%）的影响下，nZVI/PMS 体系仍能达到 SDZ 的令人满意的降解效率。两种体系对四环素（超过 98.9%）和五种常见消毒剂（超过 96.3%）的高降解效率证实了它们对污染物去除的适用性。为了去除化学和生物污染物，不需要额外的化学合成步骤来修饰 nZVI 以激活 PMS。
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