| 张昊龙,方国东,戴竞,赵远.纳米零价铁活化高碘酸盐去除水解尿液中磺胺嘧啶的机制[J].农业环境科学学报,2025,44(12):3222-3229. |
| 纳米零价铁活化高碘酸盐去除水解尿液中磺胺嘧啶的机制 |
| Mechanistic on sulfadiazine removal from hydrolyzed urine by nano zero-valent iron activated periodate |
| 投稿时间：2025-01-22 |
| DOI：10.11654/jaes.2025-0080 |
| 中文关键词: 高碘酸盐 纳米零价铁 水解尿液 磺胺嘧啶 高价金属 |
| 英文关键词: periodate nanoscale zero-valent iron hydrolyzed urine sulfadiazine high-valent metal |
| 基金项目:国家重点研发计划项目（2022YFC3702103）；国家自然科学基金项目（42107382，42130707）；土壤研究所145项目（ISSASIP2213） |
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| 中文摘要: |
| 为了探索抗生素污染物的高效降解技术，本文基于高碘酸盐高级氧化技术（PI-AOPs）可高效降解有机污染物的特点，研究了纳米零价铁（nZVI）活化高碘酸盐（PI）对于水解尿液中典型抗生素磺胺嘧啶（SDZ）的处理效果及机制。结果表明：相较于nZVI活化过硫酸盐（nZVI/PS），nZVI/PI去除SDZ的速率更快，可达0.09 h-1。尿液组分中的HCO3-和NH4+对于SDZ的降解具有显著的抑制作用，而Cl-的影响不显著。活性物种鉴定实验表明，高价金属[Fe（Ⅳ）]和碘自由基（·IO3）共同驱动了尿液中SDZ的去除。质谱显示，SDZ通过嘧啶开环、S N键断裂、C N键断裂和分子重排等途径分解。分解产物分析发现，反应后大多数产物的生态毒性相较于SDZ明显减弱，证明了nZVI/PI的环境友好性。 |
| 英文摘要: |
| Periodate-based advanced oxidation processes（PI-AOPs）showed efficient elimination efficiency towards organic pollutants. To explore efficient degradation technologies for antibiotic pollutants, this study investigated the treatment efficiency and mechanisms of sulfadiazine（SDZ）degradation by nanoscalezero-valentiron（nZVI）activated periodate（PI）oxidation processes. The results demonstrate that nZVI/PI system achieved a faster SDZ removal rate（0.09 h-1）compared with nZVI/PS system. The presence of HCO3- and NH4+ in urine significantly inhibited the degradation of SDZ, while Cl- had a negligible effect. Active species identification experiments indicated that high-valent iron[Fe（Ⅳ）] and iodate radical（·IO3）collectively drived the removal of SDZ from urine. Mass spectrometry indicates that SDZ decomposes through pathways such as pyrimidine ring opening, S—N bond cleavage, C—N bond cleavage, and molecular rearrangement.Product analysis revealed that major degradation products exhibited significantly lower ecological toxicity compared to the parent compound, demonstrating the environmental friendliness of nZVI/PI. |
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