IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Xixi Di, Xia Zeng, Xiaoyu Zhang, Tian Tang, Zuoping Zhao, Wei Wang, Zhifeng Liu, Lingxia Jin, Xiaohui Ji, Xianzhao Shao
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引用次数: 0

摘要

本研究旨在开发一种一步热解工艺,通过生产氮磷掺杂碳材料(NPTC3-800),高效活化过硫酸盐(PMS)并降解盐酸四环素(TCH)。此外,它还具有较高的比表面积(658 cm2g-1)、较大的孔隙体积(0.3 cm3g-1)和一定的杂原子(氮和磷)含量。经 PMS 活化的 NPTC3-800 在 40 分钟内对 TCH 的去除率超过 90%,观察到的速率常数(kobs)为 0.0307 min-1。同样,这些材料也表现出了很强的抗离子干扰能力,在各种水体中具有广泛的适用性。为了进一步评估催化剂的稳定性(92%,40 小时),还进行了迁移实验。电子顺磁共振(EPR)观察和自由基淬灭实验证明,非自由基氧化途径,尤其是单线态氧(1O2),在 TCH 降解过程中发挥了主导作用。理论计算表明,与纯生物炭相比,N 和 P 共掺域大大提高了 TCH 的去除率。最后,确定了 TCH 的拟议降解途径,由此产生的降解产物显示出较低的生物毒性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nitrogen-phosphorus codoped biochar prepared from tannic acid for degradation of trace antibiotics in wastewater.

This study was designed to develop a one-step pyrolysis process that could efficiently activate peroxymonosulfate (PMS) and degrade tetracycline hydrochloride (TCH) by producing N, and P codoped carbon materials (NPTC3-800). Furthermore, it exhibited a high specific surface area (658 cm2 g-1), a larger pore volume (0.3 cm3 g-1), and a certain content of heteroatoms (nitrogen and phosphorus). PMS-activated NPTC3-800 attained a TCH removal efficiency of over 90% within 40 min, with an observed rate constant (kobs) of 0.0307 min-1. Similarly, the materials exhibited strong resistance to ionic interferences and showed broad applicability across various water bodies. Mobility experiments were conducted to further assess the stability of catalyst (92%, 40 h). Non-radical oxidation pathways, particularly including the singlet oxygen (1O2), were evidenced to play dominant roles in TCH degradation, as demonstrated by electron paramagnetic resonance (EPR) observations and experiments with free radical quenching. Theoretical calculations demonstrated that the N and P codoped domains substantially improve TCH removal compared to pure biochar. Finally, the proposed degradation pathways for TCH were identified, and the resulting degradation products demonstrated reduced biological toxicity.

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来源期刊
Environmental Research
Environmental Research 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
12.60
自引率
8.40%
发文量
2480
审稿时长
4.7 months
期刊介绍: The Environmental Research journal presents a broad range of interdisciplinary research, focused on addressing worldwide environmental concerns and featuring innovative findings. Our publication strives to explore relevant anthropogenic issues across various environmental sectors, showcasing practical applications in real-life settings.
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